VR-P2MF-01-04
March 2002
Revision 0
Environmental Technology
Verification Report
Evaluation of Hadwaco MVR
Evaporator
Prepared by
Concurrent Technologies Corporation
Under a Cooperative Agreement with
A EPA
U.S. Environmental Protection Agency
Revision 0
etVetVetY

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NOTICE
This publication was developed under Cooperative .Agreement No. CR826492-01-0 awarded by
the U.S. Environmental Protection Agency (EPA). The Agency reviewed this document. The
Agency made comments and suggestions on the document intended to improve the scientific
analysis and technical accuracy of the statements contained in the document. Concurrent
Technologies Corporation (CTC) accommodated EPA's comments and suggestions. However,
the views expressed in this document are those of Concurrent Technologies Corporation, and
EPA does not endorse any products or commercial services mentioned in this publication. The
document will be maintained by Concurrent Technologies Corporation in accordance with the
Environmental Technology Verification Program Metal Finishing Technologies Quality
Management Plan. Document control elements include unique issue numbers, document
identification, numbered pages, document distribution records, tracking of revisions, a document
master filing and retrieval system, and a document archiving system.
1

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VR-P2MF-01-04
March 2002
Revision 0
Environmental Technology
Verification Report
Evaluation of Hadwaco MVR
Evaporator
Prepared by
Project Manager
Peter A. Gallerani
Integrated Technologies, Inc.
Danville, VT 05828
ETV-MF Program Manager
Donn Brown
Concurrent Technologies Corporation
Largo, FL 33773
EPA ETV Center Manager
George Moore
National Risk Management Research Laboratory
Cincinnati, OH 45628
11

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FOREWORD
The Environmental Technology Verification (ETV) Program has been established by the U.S.
Environmental Protection Agency (EPA) to evaluate the performance characteristics of
innovative environmental technologies for any media and to report this objective information to
the states, local governments, buyers, and users of environmental technology.
EPA's ETV Program, through the National Risk Management Research Laboratory (NRMRL),
has partnered with CTC under the Environmental Technology Verification Program for Metal
Finishing Pollution Prevention (P2) Technologies (ETV-MF) Center. The ETV-MF Center, in
association with EPA's Metal Finishing Strategic Goals Program, was initiated to identify
promising and innovative metal finishing pollution prevention technologies through EPA-
supported performance verifications. The following report describes the verification of the
performance of Hadwaco's Mechanical Vapor Recompression (MVR) Evaporator as applied at a
metal finishing facility.
Ill

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ACRONYM and ABBREVIATION LIST
CAN	Canadian
COC	Chain-of-Custody
CTC	Concurrent Technologies Corporation
Cu	Copper
°C	Degrees Celsius
DOT	Department of Transportation
EPA	U.S. Environmental Protection Agency
ETV	Environmental Technology Verification
ETV-MF	Environmental Technology Verification Program for Metal Finishing
Pollution Prevention Technologies
gal	Gallon
gpd	Gallons per Day
HDPE	High Density Polyethylene
ICP-AES	Inductively Coupled Plasma - Atomic Emission Spectroscopy
ID	Identification
IDL	Instrument Detection Limit
kWh	Kilowatt Hours
L	Liter
L/day	Liters per Day
m3	Cubic Meter
MCC	Motor Control Center
MDL	Method Detection Limit
mg/L	Milligram per Liter
MRL	Method Reporting Limit
Ms	Millisiemen
MSD	Matrix Spike Duplicate
MVR	Mechanical Vapor Recompression
?	Micron
? S	Microsiemens
NA	Not Applicable
NC	Not Calculated
ND	Not Detected
NPDES	National Pollutant Discharge Elimination System
NR	Not Regulated
NRMRL	National Risk Management Research Laboratory
O&M	Operation and Maintenance
ORD	Office of Research & Development
OSHA	Occupational Safety and Health Administration
P2	Pollution Prevention
P	Percent Recovery
PARCCS	Precision, Accuracy, Representativeness, Comparability, Completeness, and
Sensitivity
Pb	Lead
PE	Polyethylene
iv

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ACRONYM and ABBREVIATION LIST (continued)
pH
Value used to express acidity or alkalinity
psi
Pounds per Square Inch
QA
Quality Assurance
QC
Quality Control
QMP
Quality Management Plan
Ref.
Reference
RPD
Relative Percent Difference
SR
Sample Result
SSR
Spiked Sample Result
STL
Severn Trent Laboratories
T
Total
IDS
Total Dissolved Solids
TS
Total Solids
TSA
Technical Systems Audit
TSS
Total Suspended Solids
U.S.
United States
V

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ACKNOWLEDGEMENTS
This is to acknowledge Percy Peltzer, Scott Maurer, and Valerie Whitman of CTC for their help
in preparing this document. CTC also acknowledges the support of all those who helped plan
and implement the verification activities and prepare this report. In particular, a special thanks to
George Moore, Ph.D., EPA ETV Center Manager, and Lauren Drees, EPA Quality Assurance
Manager. CTC also expresses sincere gratitude to Hadwaco, the manufacturer of the MVR
Evaporator, for their participation in and support of this program. In particular, CTC thanks
David Thomas, General Manager of Hadwaco. CTC also wants to thank Normand Bedard of
Laboratorire des Technologies Electrochimiques et des Electrotechnologies of Hydro Quebec for
his participation in the testing.
V]

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I lll ENVIRONMENTAL TECHNOLOGY VERIFICATION PROGRAM
oEPA
Concurrent
CK .*3 Tecltiwlt>p>ies
Corporation
U.S. Environmental Protection Agency	Concurrent Technologies Corporation
ETV VERIFICATION STATEMENT
TECHNOLOGY TYPE:
WASTEWATER TREATMENT

APPLICATION:
RINSE WATER RECYCLING

TECHNOLOGY NAME:
Hadwaco MVR Evaporator

COMPANY:
Hadwaco US, Inc.

POC:
David Thomas

ADDRESS:
2310 Peachford Road PHONE:
(770) 457-4429

Atlanta, GA 30338 FAX:
(770) 457-4420
E-MAIL:
david.thomas@hadwaco.com

The United States Environmental Protection Agency (EPA) has created the Environmental Technology
Verification (ETV) Program to facilitate the deployment of innovative or improved environmental technologies
through performance verification and dissemination of information. The goal of the ETV Program is to further
environmental protection by substantially accelerating the acceptance and use of improved, cost-effective
technologies. ETV seeks to achieve this goal by providing high-quality, peer-reviewed data on technology
performance to those involved in the design, distribution, financing, permitting, purchase, and use of
environmental technologies.
ETV works in partnership with recognized standards and testing organizations, stakeholder groups consisting of
buyers, vendor organizations, states, and others with the full participation of individual technology developers.
The program evaluates the performance of innovative technologies by developing test plans that are responsive to
the needs of stakeholders, conducting field or laboratory tests (as appropriate), collecting and analyzing data, and
preparing peer-reviewed reports. All evaluations are conducted in accordance with rigorous quality assurance
protocols to ensure that data of known and adequate quality are generated, and that the results are credible.
The ETV P2 Metal Finishing Technologies (ETV-MF) Program, one of 12 technology focus areas under the ETV
Program, is operated by Concurrent Technologies Corporation, in cooperation with EPA's National Risk
Management Research Laboratory. The ETV-MF Program has evaluated the performance of a wastewater
treatment system for processing wastewater containing dissolved metals. This verification statement provides a
summary of the test results for the Hadwaco Mechanical Vapor Recompression (MVR) Evaporator.
VS-P2MF-01-04

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VERIFICATION TEST DESCRIPTION
The Hadwaco MVR Evaporator was tested, under actual production conditions, processing copper pickling
wastewater, at a test site in Canada. The verification test evaluated the ability of the Hadwaco MVR Evaporator
to recycle wastewater and recover process chemistry.
The test plan was designed for four days of testing, and data were collected on three different streams:
?? Evaporator Feed (process rinse water)
?? Evaporator Distillate or Condensate (rinse water makeup)
?? Evaporator Concentrate (process makeup).
Electricity and water usage data were collected to perform the cost analysis.
TECHNOLOGY DESCRIPTION
The Hadwaco MVR Evaporator tested is a standard unit, which has a capacity of 92,500 gallons per day (gpd).
The unit was permanently installed on a full-scale production line. The evaporator tested contains 24 individual
heat transfer cartridges: each cartridge is comprised of 46 individual heat transfer elements. The metal-containing
wastewater is pumped into the circulating stream. The circulated stream is pumped onto the heat transfer
cartridge where the liquid boils, thus separating water (vapor) from the concentrating liquid. A part of the
concentrating liquid is pumped off as concentrate and the rest is recirculated with some feed wastewater back to
the heat transfer cartridge. MVR Evaporators recycle all vapors as heating steam by adding energy via vapor
compression with high-pressure fans.
VERIFICATION OF PERFORMANCE
Grab samples were collected twice daily over a four day period from the Hadwaco MVR Evaporator feed,
condensate, and concentrate. Samples were analyzed to determine the chemical characteristics of the feed,
condensate, and concentrate. The data from Hadwaco's MVR Evaporator in-process computer were used to
obtain the flow rates of feed, condensate, and concentrate to determine evaporator workload, concentration factor,
and recovery efficiency. Both the chemical characteristics and the flow rates were used to determine the mass
balances and separation efficiencies.
Average analytical results for the chemical parameters are shown in Table i. Chemical parameters of concern are
copper, lead, pH, sulfate, acidity (as CaC03), total suspended solids (TSS), and total dissolved solids (TDS).
VS-P2MF-01-04

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Anal
ysis Method

Sample
Total
Suspended
Solids
mg/L
(EPA
160.2)
Total
Dissolved
Solids
mg/L
(EPA 160.1)
pH*
(EPA
150.1)
Copper
mg/L
(EPA
200.7)
Lead
mg/L
(EPA
200.7)
Acidity
(as
caco3)
mg/L
(EPA
305.1)
Sulfate
mg/L
(EPA
300.0)
Conductivity
Temp
C?
#1 Day 1 Feed
<5.0
680
2.0
97.0
0.099
1100
1400
4.64 ms
51.8
#1 Day 1 Condensate
<5.0
46
1.9
1.9
<0.005
36
13.2
138.0 fj.s
25.2
#1 Day 1 Concentrate
50.0
23000
1.1
6800
2.700
37000
45000
>19.99 ms
54.8
#2 Day 1 Feed
12.0
2600
1.5
790
0.380
3400
6300
11.99 ms
42.6
#2 Day 1 Condensate
<5.0
28
3.7
1.9
<0.005
46
7.2
108.7 [is
37.8
#2 Day 1 Concentrate
69.0
27000
1.0
6400
2.600
45000
38000
>19.99 ms
53.8
#2 Day 1 Dup. Feed
15.0
3100
1.8
780
0.400
3600
3300
11.99 ms
42.6
#2 Day 1 Dup.
Condensate
<5.0
50
3.2
2.0
<0.005
130
13.4
108.7 \is
37.8
#2 Day 1 Dup.
Concentrate
78.0
25000
1.2
6700
<2.500
23000
46000
>19.99 ms
53.8
#1 Day 2 Feed
7.2
760
1.4
260
0.110
1300
1400
5.26 ms
42.9
#1 Day 2 Condensate
<5.0
50
1.9
3.0
<0.005
51
13.5
131.9 |is
46.5
# 1 Day 2 Concentrate
89.0
34000
<1.0
8800
3.400
56000
50000
>19.9 ms
58.8
#2 Day 2 Feed
8.4
1100
2.3
220
0.098
1500
1500
6.07 ms
45.6
#2 Day 2 Condensate
<5.0
48
2.1
3.3
<0.005
28
15.0
146.4 fj.s
46.2
#2 Day 2 Concentrate
87.0
37000
<1.0
9300
3.400
50000
60000
>19.9 ms
49.9
#1 Day 3 Feed
<5.0
660
1.6
100
<0.050
870
980
4.01 ms
46.2
#1 Day 3 Condensate
<5.0
22
1.9
1.6
<0.005
17
6.4
103.9 [is
46.9
# 1 Day 3 Concentrate
56.0
22000
1.0
4900
<2.500
34000
30000
>19.9 ms
56.9
#2 Day 3 Feed
<5.0
1100
1.8
240
0.078
2100
1900
7.89 ms
47.7
#2 Day 3 Condensate
<5.0
28
2.9
1.8
<0.005
54
9.1
108.7 \is
47.5
#2 Day 3 Concentrate
63.0
24000
1.0
5600
<2.500
36000
44000
>19.9 ms
51.7
#1 Day 4 Feed
5.2
740
1.6
150
<0.005
1100
1200
4.98 ms
48.0
#1 Day 4 Condensate
<5.0
92
1.8
1.8
<0.005
20
12.1
132.2 [is
48.2
# 1 Day 4 Concentrate
85.0
33000
<1.0
6700
<2.500
50000
46000
>19.9 ms
55.8
#2 Day 4 Feed
9.2
1200
1.7
260
0.080
1900
1800
7.05 ms
48.3
#2 Day 4 Condensate
<5.0
30
2.2
1.7
<0.005
74
11.7
130.8 ms
50.3
#2 Day 4 Concentrate
91.0
80000
1.0
6800
<2.500
54000
60000
>19.9 ms
54.1
*pH units
Table i. Summary of Analytical Results
Mass Balance. The mass balances were calculated by adding condensate constituent mass and concentrate
constituent mass and dividing by feed constituent mass for each day, then multiplying the results by 100 percent
and are shown in Table ii. The mass balances for the first day were below the mass balance accuracy criterion of
75 percent to 125 percent. These values were low because the MVR Evaporator was operated in recycle mode
(the condensate and concentrate streams were returned to the feed tank) due to a transfer pump between the
process and the evaporator being out of service. For the other three days, the mass balances ranged from 78.9
percent (acidity - day 3) to 201.4 percent (TDS - day 4). The mass balances for the TDS were a little over 125
percent for day 2 and well over 125 percent for day 4. Over all, the mass balance calculations indicate that all of
the mass can be accounted for within a reasonable error and the system was operating without major upset on
days 2-4. The mass balance calculation is affected by normal concentration variations in the feed and
concentration variations in the concentrate inherent in the operation of the evaporator. The mass balances for lead
and TSS were not calculated because the feed concentration for them was below detection limits.
VS-P2MF-01-04

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Date
Copper
Sulfate
TDS
Acidity

%
%
%
%
09/25/01
48.6
35.2
51.6
60.8
09/26/01
120.6
121.0
125.9
122.7
09/27/01
101.3
84.0
87.6
78.9
09/28/01
111.2
119.2
201.4
119.3
Table ii. Mass Balance
Evaporator Workload. The evaporator workload was determined by the volume of condensate recovered per
day. The evaporator workload is shown in Table iii.
Date
Evaporator Workload L/day (gpd)
09/25/01
338,000 (89,300)
09/26/01
345,000 (91,100)
09/27/01
337,000 (89,000)
09/28/01
217,000 (57,300)*
*9/27/01 test was for 16 hours
Table iii. Evaporator Workload
Concentration Factor. The concentration factors were calculated on a daily basis as a quantitative measure of
system performance. The concentration factors for the evaporator were calculated by dividing the feed volume by
concentrate volume. The concentration factors range from 29.8 to 31.6 as shown in Table iv.
Date
Concentration Factor
09/25/01
30.9
09/26/01
31.6
09/27/01
30.8
09/28/01
29.8
Table iv. Concentration Factor
Recovery Efficiency. The recovery efficiency was determined by dividing the volume of water recovered as
condensate by the volume of water in the feed and multiplying by 100 percent for each day. The recovery
efficiencies for the evaporator range from 96.6 percent to 96.8 percent and are shown in Table v.
Date
Recovery Efficiency %
09/25/01
96.8
09/26/01
96.6
09/27/01
96.8
09/28/01
96.6
Table v. Recovery Efficiency
Separation Efficiency. The separation efficiencies were calculated on a daily basis. They were calculated by
subtracting the condensate constituent mass from the feed constituent mass, dividing the result by the feed
constituent mass times, and then multiply by 100 percent. Separation efficiencies for the parameters ranged from
93.9 percent (TDS - day 4) to 99.7 percent (Sulfate - day 1). The separation efficiencies are shown in Table vi.
VS-P2MF-01-04	X

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Copper
Sulfate
TDS
Acidity
Date
%
%
%
%
09/25/01
99.6
99.7
97.8
98.2
09/26/01
98.7
99.1
94.9
97.3
09/27/01
99.0
99.5
97.3
97.7
09/28/01
99.2
99.2
93.9
97.0
Table vi. Separation Efficiency
Energy and Water Use. The power consumption of the Hadwaco MVR Evaporator unit was 12.0 kWh per 1000
liters of condensate produced. There were 152 liters of noncontact cooling water used per 1000 liters of
condensate produced. To produce steam for the system, 1.9 kWh of power were required per 1000 liters of
condensate.
Operation and Maintenance Labor Analysis. The labor costs are minimal because of the fully automated
design; therefore, the operator was only required to make daily inspections of the unit and check the system
operation parameters during the test. These tasks are projected to require a total of approximately three hours of
operation and maintenance labor per week.
Cost of Operation. The costs of the operation are figured on the costs of producing a thousand liters of
condensate. The energy cost is based on 13.9 kWh electricity per thousand liters of condensate at a cost of
$0.015/kWh based on an exchange rate of $1.00 (Canadian) = $0,627 (US Dollars) as of 1/15/02. The energy cost
calculated for a thousand liters of condensate is $0,209. The system noncontact cooling water cost is $0,029 per
thousand liters of condensate. This is based on using 152 L of noncontact cooling water per thousand liters of
condensate with a water cost of $0,194 per thousand liters. There was an expenditure of 1.6 hours of labor at a
cost of $31.35/hour. Dividing by the total volume of condensate recovered. This results in labor cost of $0,041
per thousand liters of condensate. Total costs for a thousand liters of condensate during the test run is calculated
by summing the individual cost elements: $0,209 + $0,029 +$0,041 = $0,279.
Environmental. The evaporator is operated as a totally automated closed-loop system; both the concentrate and
condensate are returned to the process. The energy costs are very low because the system utilizes the latent heat
in the condensing distillate and feed (feed temperature is approximately 46°C). The system uses no materials
other than steam and noncontact cooling water. The only waste stream produced is noncontact cooling water.
Based on the host facility's seven days/forty-eight weeks of operation, the Hadwaco MVR Evaporator system is
projected to eliminate the need to treat 116,600,000 L per year of process wastewater. In addition, 112,900,000 L
of water per year is projected to be saved by using the condensate as makeup water for the process. The
evaporator system produces a concentrate that allows the host facility to effectively electrowinn metallic copper
for reclaiming. Thus, it is projected lhat the host facility evaporator system in combination with electrowinning
could prevent approximately 23,900 kg/year of copper and 170,700 kg/year of sulfate from being treated as waste.
The copper is recovered as metallic copper through electrowinning aid sold as scrap metal, and a projected
99,700 L of recovered sulfuric acid is reused in the process.
VS-P2MF-01-04

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SUMMARY
The test results show that the Hadwaco MVR Evaporator system provides an environmental benefit by
evaporating the host facility wastewater for reuse within the process, thereby reducing the amount of fresh
makeup water required each day. The Hadwaco MVR Evaporator system achieved a very high recovery of the
treated water (96 percent). The major economic benefit associated with this technology is in reduced waste
disposal costs and raw water purchase costs associated with the recycling of the wastewater back to the process.
As with any technology selection, the end user must select appropriate wastewater treatment equipment and
chemistry for a process that can meet their associated environmental restrictions, productivity, and water quality
requirements.
Original Signed By:
E. Timothy Oppelt	
E. Timothy Oppelt
Director
National Risk Management Research Laboratory
Office of Research and Development
U.S. Environmental Protection Agency
Original Signed By:
Donn W. Brown	
Donn W. Brown
Manager
P2 Metal Finishing Technologies Program
Concurrent Technologies Corporation
NOTICE: EPA verifications are based on evaluations of technology performance under specific, predetermined
criteria and appropriate quality assurance procedures. EPA and CTC make no expressed or implied warranties as
to the performance of the technology and do not certify that a technology will always operate as verified. The
end user is solely responsible for complying with any and all applicable federal, state, and local requirements.
Mention of commercial product names does not imply endorsement.
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TABLE OF CONTENTS
1.0 INTRODUCTION	1
2.0 DESCRIPTION OF THE HADWACO MVR EVAPORATOR	1
2.1	Hadwaco MVR Evaporator	1
2.2	Test Site Installation	2
3.0 METHODS AND PROCEDURES	3
3.1	Test Objectives	3
3.2	Test Procedure	4
3.2.1	System Set-Up and Initialization Procedure	4
3.2.2	System Operation	4
3.2.3	Testing	4
3.2.4	Process Measurements and Information Collection	5
3.2.4.1	Process Stream Flow Rate and Volume Processed	5
3.2.4.2	Conductivity and pH of Process Stream	5
3.2.4.3	Temperature of Process Streams	5
3.2.4.4	Additional Information	6
3.3	Quality Assurance/Quality Control	6
3.3.1	Data Entry	6
3.3.2	Sample Collection and Handling	6
4.0 VERIFICATION DATA	6
4.1	Analytical Results	6
4.2	Calculation of Data Quality Indicators	8
4.2.1	Precision	8
4.2.2	Accuracy	8
4.2.3	Completeness	9
4.2.4	Comparability	9
4.2.5	Representativeness	9
4.2.6	Sensitivity	10
4.3	Process Measurements	12
4.3.1	Flow Measurements	12
4.3.2	Operation and Maintenance Labor	12
4.3.3	Additional Information	12
xiii

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5.0 EVALUATION OF RESULTS	13
5.1	Mass Balance	13
5.2	Evaporator Workload	14
5.3	C oncentrati on F actor	14
5.4	Recovery Efficiency	15
5.5	Separation Efficiency	15
5.6	Energy and Water Use	17
5.7	Operation and Maintenance Labor Analysis	18
5.8	Cost Analysis	18
5.9	Environmental Benefit	20
5.10	Proj ect Responsibilities/Audits	20
6.0 REFERENCES	21
LIST OF FIGURES
Figure 1. Hadwaco MVR Evaporator Cartridge	1
Figure 2. MVR Operating Principle	2
Figure 3. Separation Efficiency	16
LIST OF TABLES
Table 1. Raw Wastewater (Feed) Data	3
Table 2. Test Objectives and Related Test Measurements for Evaluation of the
Hadwaco MVR Evaporator System	4
Table 3. Summary of Analytical Results	7
Table 4. QA Objectives	11
Table 5. Volumes of Wastewater Treated	12
Table 6. Mass Balance	13
Table 7. Evaporator Workload	14
Table 8. Concentration Factor	14
Table 9. Recovery Efficiency	15
xiv

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Table 10. Separation Efficiency	17
Table 11. Annual Operating Cost	19
LIST OF APPENDICES
APPENDIX A: Precision Calculations	 A-l
APPENDIX B: Accuracy Calculations	 B-l
APPENDIX C: Representativeness Calculations	 C-l
xv

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1.0 INTRODUCTION
For the testing facility, the Hadwaco Mechanical Vapor Recompression (MVR) Evaporator is
designed to process wastewaters containing dissolved metals. The unit that was tested is
permanently installed on a full-scale production line. The evaporator unit was tested by CTC
under the U.S. Environmental Protection Agency's (EPA's) Environmental Technology
Verification Program for Metal Finishing Pollution Prevention (P2) Technologies (ETV-MF).
The purpose of this report is to present the results of the verification test.
The Hadwaco MVR Evaporator system was tested to evaluate and characterize the operation of
the evaporator through measurement of the various operation and aqueous streams. Testing of
the Hadwaco MVR Evaporator system was conducted at a facility that has requested anonymity.
The host facility is a major global manufacturer of copper product. The industrial operations that
generate wastewater at this location include copper pickling.
2.0 DESCRIPTION OF THE HADWACO MVR EVAPORATOR
2.1 Hadwaco MVR Evaporator
The Hadwaco MVR Evaporator that was tested is a standard unit that has a capacity of
92,500 gallons per day (gpd). The unit was permanently installed on a full-scale
production line.
The Hadwaco MVR Evaporator consists of 24 individual heat transfer modules
cartridges. Each cartridge is comprised of 46 individual heat transfer elements, as shown
in Figure 1.
4
TO
CONDENSATE
TANK
VAPOR FROM FAN
FROM
CIRCULATION
mill llll PUMP
t
TO
CIRCULATION
PUMP
TION
| VAPOR TO FAN
Figure 1. Hadwaco MVR Evaporator Cartridge
1

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The overall operation flow of the liquid in evaporate is shown in Figure 2 The metal-
containing wastewater is pumped into the circulating stream. The circulated stream is
distributed onto the outer surface of the heat transfer cartridge where liquid is boiled
separating water vapor from the concentrating liquid that is collected in the lower portion
of the vessel. A part of the concentrating liquid is pumped off as concentrate and the rest
is recirculated with some feed wastewater.
POLYMERIC
HEAT TRANSFER
SURFACE
0,176 bar(a)
2.55 psia
135.1T
6 7,3eC
?T= 2,3°C
4.1V
131'F
29 pa/a
?p = 0,018 bar
~180 mmwg (~7 "WG)
CONDENSATE
CONCENTRATE
Note: European notation; comma serves as decimal point
Figure 2. MVR Operating Principle
The generated vapor has its energy (pressure and temperature) increased via mechanical
compression. The compressed vapor is then condensed on the inner surface of the heat
transfer surface, giving up its latent heat. This heat is transferred to the outer surface
where it is used to continue the boiling process.
2.2 Test Site Installation
The Hadwaco MVR Evaporator system is installed at a manufacturing site that has
requested anonymity. This facility manufactures copper product. The copper p-oduct is
pickled in sulfuric acid to remove heat scale. The facility generates up to 400 cubic
meters (m3) or 105,680 gallons (gal) of rinse water for recycle per day. The equipment
serves to process a wastewater feed stream characterized by data generated by the test
site, shown in Table 1. Due to the characteristics and acidity of the waste stream, total
suspended solids (TSS) is very low and the total dissolved solids (IDS) is high.
2

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Parameter
Average Concentration
Maximum Concentration
Copper
1100 mg/L
1500 mg/L
Acidity
1600 mg/L
6300 mg/L
TDS
1100 mg/L
3000 mg/L
TSS
<10 mg/L
<20 mg/L
pH
<2
<1
mg/L = milligrams per Liter
Table 1. Raw Wastewater (Feed) Data
3.0 METHODS AND PROCEDURES
3.1 Test Objectives
The overall goal of this ETV-MF project was to evaluate the ability of the Hadwaco
MVR Evaporator to operate as the main step in a zero-wastewater discharge system in a
metal finishing plant. The following is a summary of primary project objectives:
?? Conduct verification testing in order to:
1)	Determine the evaporator separation efficiency
2)	Evaluate the evaporator workload
3)	Determine the evaporator energy usage
4)	Determine concentration factor
5)	Determine recovery efficiency
?? Determine the cost of operating the Hadwaco MVR Evaporator system for the
specific conditions encountered during testing:
1)	Identify operation and maintenance (O&M) tasks
2)	Determine the cost of energy consumed by operating the system
3)	Determine the cost savings associated with the recovered copper, sulfuric acid,
and water
?? Quantify the environmental benefit by determining the recovered amount of copper
(Cu), sulfuric acid (H2SO4), and water (H2O)
Test objectives and measurements are summarized in Table 2.
3

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Test Objective
Test Measurement
Determine the workload,
separation efficiency, energy
use, and O&M requirements
-Daily raw wastewater feed volume (liters (L))
-Daily recovered condensate (distillate) (L)
-Daily recovered concentrate (L)
-Energy use (kilowatt-hour per 1000 L (kWh/1000 L))
-Chemical characteristics of feed, condensate, and
concentrate streams (mg/L of Cu, Lead (Pb), sulfate,
TDS, TSS, and acidity (as CaCCh); pH, and
conductivity)
-Temperature
-City water flow volume (L)
-O&M labor tasks
Table 2. Test Objectives and Related Test Measurements for Evaluation
of the Hadwaco MVR Evaporator System
3.2 Test Procedure
3.2.1	System Set-Up and Initialization Procedure
The unit used is a full-scale Hadwaco MVR Evaporator Model No. E340,
permanently installed on a full-scale production line. The source of raw
wastewater is untreated process wastewater from the copper pickling process.
Sampling ports were preinstalled in the feed, condensate, and concentrate piping
loops.
3.2.2	System Operation
The host facility operated the Hadwaco MVR Evaporator system according to the
procedures found in the verification test plan [Ref 1], The unit was observed for a
day before the testing, and samples were collected during the following four days.
3.2.3	Testing
This verification test was originally designed to have continuous feed from the
acid pickling first rinse during the test period. During the first day of sampling,
the transfer pump between the process and the evaporator failed and it had to be
repaired. Therefore, the condensate and concentrate streams were returned back
to the evaporator until the transfer pump was replaced. The transfer pump was
replaced and returned to normal operating conditions just minutes before the
second sampling. For the rest of the test period, the operation of the evaporator
was according to the test plan.
4

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3.2.4 Process Measurements and Information Collection
Process measurements and other information were collected to provide the
following data: flow operation and maintenance activities, and historical
discharge data. The methods that were used for process measurements and
information collection are discussed in the following sections.
3.2.4.1	Process Stream Flow Rate and Volume Processed
The volume of process streams processed during the test run was
measured using a Rosemount 8712 series flowmeter/totalizer. This
instrumentation is presently installed in the Hadwaco MVR Evaporator
system and is factory calibrated. The factory calibration certificates were
inspected and were found to be current. The flow totalizer reading of each
stream was obtained from the evaporator in-process control computer.
The in-process control computer records the reading every five minutes,
and these readings were used in this report.
3.2.4.2	Conductivity and pH of Process Stream
Wastewater conductivity was measured with an Oakton Acorn? Series
CON 5 microprocessor-controlled, automatic temperature-compensated
conductivity meter. The digital conductivity meter was calibrated at the
start of each sampling day by the ETV-MF Project Manager. The
following calibration information was collected and recorded in the field
logbook. Wastewater pH was to be measured on-site with a Davis
Instruments Model #9214 microprocessor-controlled, automatic
temperature-compensated pH meter, and the second day the probe broke.
A test modification was written to have the pH measurement performed by
the analytical lab (Severn Trent Laboratories (STL)), using EPA Method
150.1.
3.2.4.3	Temperature of Process Streams
The temperature of the water processed during the test run was measured
using a Rosemount 644 series temperature meter. This instrumentation is
presently installed in the Hadwaco MVR Evaporator system and is factory
calibrated. A factory calibration certificate was inspected and found to be
current. The instantaneous temperature was read two times per day
(morning and afternoon) during the test run. Those readings were
recorded in the field logbook.
5

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3.2.4.4 Additional Information
Other information collected during the verification test included: 1) energy
- kilowatt-hours (kWh) usage, 2) city water usage, and 3) evaporator
O&M tasks. Cost data were obtained from the host site.
3.3 Quality Assurance/Quality Control
3.3.1	Data Entry
Sampling events, process measurements, and other data were recorded by the
ETV-MF Project Manager in a field logbook. Note that a Test Plan Modification
was written to collect the information in the field logbook instead of the form in
the verification test plan [Ref. 1],
3.3.2	Sample Collection and Handling
Grab samples were collected twice daily (the first set of samples was collected in
the morning between nine and ten and the second set was collected between three
and four in the afternoon) from each of the sampling locations (feed, condensate,
and concentrate). These samples were collected into high-density polyethylene
(HDPE) containers.
At the time of sampling, each sample container was labeled with the date, time,
test parameter required, and sample identification (ID) number. Samples to be
analyzed at an off-site laboratory were accompanied by a chain-of-custody (COC)
form; the ETV-MF Project Manager generated the COC form, which provides the
following information: project name, project address, sampler's name, sample
numbers, date/time samples were collected, matrix, required analyses, and
appropriate COC signatures. All samples were transported in coolers with
packing and blue ice to the lab by two-day express service. The transport
containers were secured with COC tape to ensure sample integrity during the
delivery process to the analytical laboratory. The ETV-MF Project Manager
performed sampling and labeling, and ensured that samples were properly secured
and shipped in accordance with Department of Transportation (DOT) and
Occupational Safety and Health Administration (OSHA) regulations to the
laboratory for analysis.
4.0 VERIFICATION DATA
4.1 Analytical Results
A summary of analytical data is presented in Table 3. Grab samples of the evaporator
feed, condensate (distillate), and concentrate were collected twice a day for four days and
analyzed for total dissolved solids (TDS), total suspended solids (TSS), pH, copper (Cu),
lead (Pb), acidity, and sulfate.
6

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Analy
sis Method





Total
Total








Suspended
Dissolved

Copper
Lead
Acidity (as
Sulfate



Solids
Solids

mg/L
mg/L
caco3)
mg/L


Sample
mg/L
mg/L
pH*
(EPA
(EPA
mg/L
(EPA
Conductivity
Temperature

(EPA 160.2)
(EPA 160.1)
(EPA 150.1)
200.7)
200.7)
(EPA 305.1)
300.0)

C?
#1 Day 1 Feed
<5.0
680
2.0
97.0
0.099
1100
1400
4.64 ms
51.8
#1 Day 1 Condensate
<5.0
46
1.9
1.9
<0.005
36
13.2
138.0 (is
25.2
#1 Day 1 Concentrate
50.0
23000
1.1
6800
2.700
37000
45000
>19.99 ms
54.8
#2 Day 1 Feed
12.0
2600
1.5
790
0.380
3400
6300
11.99 ms
42.6
#2 Day 1 Condensate
<5.0
28
3.7
1.9
<0.005
46
7.2
108.7 \is
37.8
#2 Day 1 Concentrate
69.0
27000
1.0
6400
2.600
45000
38000
>19.99 ms
53.8
#2 Day 1 Dup. Feed
15.0
3100
1.8
780
0.400
3600
3300
11.99 ms
42.6
#2 Day 1 Dup. Condensate
<5.0
50
3.2
2.0
<0.005
130
13.4
108.7 \is
37.8
#2 Day 1 Dup. Concentrate
78.0
25000
1.2
6700
<2.500
23000
46000
>19.99 ms
53.8
#1 Day 2 Feed
7.2
760
1.4
260
0.110
1300
1400
5.26 ms
42.9
#1 Day 2 Condensate
<5.0
50
1.9
3.0
<0.005
51
13.5
131.9 lis
46.5
#1 Day 2 Concentrate
89.0
34000
<1.0
8800
3.400
56000
50000
>19.9 ms
58.8
#2 Day 2 Feed
8.4
1100
2.3
220
0.098
1500
1500
6.07 ms
45.6
#2 Day 2 Condensate
<5.0
48
2.1
3.3
<0.005
28
15.0
146.4 (is
46.2
#2 Day 2 Concentrate
87.0
37000
<1.0
9300
3.400
50000
60000
>19.9 ms
49.9
#1 Day 3 Feed
<5.0
660
1.6
100
<0.050
870
980
4.01 ms
46.2
#1 Day 3 Condensate
<5.0
22
1.9
1.6
<0.005
17
6.4
103.9 lis
46.9
#1 Day 3 Concentrate
56.0
22000
1.0
4900
<2.500
34000
30000
>19.9 ms
56.9
#2 Day 3 Feed
<5.0
1100
1.8
240
0.078
2100
1900
7.89 ms
47.7
#2 Day 3 Condensate
<5.0
28
2.9
1.8
<0.005
54
9.1
108.7 lis
47.5
#2 Day 3 Concentrate
63.0
24000
1.0
5600
<2.500
36000
44000
>19.9 ms
51.7
#1 Day 4 Feed
5.2
740
1.6
150
<0.050
1100
1200
4.98 ms
48.0
#1 Day 4 Condensate
<5.0
92
1.8
1.8
<0.005
20
12.1
132.2 lis
48.2
#1 Day 4 Concentrate
85.0
33000
<1.0
6700
<2.500
50000
46000
>19.9 ms
55.8
#2 Day 4 Feed
9.2
1200
1.7
260
0.080
1900
1800
7.05 ms
48.3
#2 Day 4 Condensate
<5.0
30
2.2
1.7
<0.005
74
11.7
130.8 ms
50.3
#2 Day 4 Concentrate
91.0
80000
1.0
6800
<2.500
54000
60000
>19.9 ms
54.1
Field Blank
<5.0
<5
6.8
<0.2
<0.005
<10
<5.0


*pH units
Table 3. Summary of Analytical Results
7

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4.2 Calculation of Data Quality Indicators
Data reduction, validation, and reporting were conducted according to the verification
test plan [Ref. 1] and the ETV-MF Quality Management Plan (QMP) [Ref. 2],
Calculations of data quality indicators are discussed in the following sections.
4.2.1	Precision
Precision is a measure of the agreement or repeatability of a set of replicate results
obtained from duplicate analyses under identical conditions. Precision is
estimated from analytical data and cannot be measured directly. To satisfy the
precision objectives, the replicate analyses must agree within defined relative
percent deviation limits.
Relative Percent Difference (RPD) is calculated as follows:
? ?
? |X?X2| ?
RPD = ? 7v 9 v ')?xl00%
9 • Ai • A2 1 9
? 2 ?
where:
Xi = larger of the two observed values
X2 = smaller of the two observed values
The analytical laboratory performed a total of 25 precision evaluations on the
samples. All except for one (pH) of the results were within the precision limits
identified in the verification test plan [Ref. 1], The results of the precision
calculations are summarized in Appendix A
4.2.2	Accuracy
Accuracy is a measure of the agreement between an experimental determination
and the true value of the parameter being measured. Analyses with spiked
samples were performed to determine percent recoveries as a means of checking
method accuracy. The percent recovery (P), expressed as a percentage, is
calculated as follows:
??SSR-SR??
P = •?	?xl00%
9 SA 9
where:
SSR = spiked sample result
SR = sample result (native)
SA = the concentration added to the spiked sample
Quality Assurance (QA) objectives are satisfied for accuracy if the average
recovery is within selected goals. The analytical laboratory performed 28

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accuracy evaluations on the samples. All results were within the limits identified
in the verification test plan [Ref. 1], The results of the accuracy calculations are
summarized in Appendix R
4.2.3	Completeness
Completeness is defined as the percentage of measurements judged to be valid
compared to the total number of measurements made for a specific sample matrix
and analysis. Completeness, expressed as a percentage, is calculated using the
following formula:
Completeness = Valid Measurements ? 100%
Total Measurements
QA objectives are satisfied if the percent completeness is 90 percent or greater.
All measurements made during this verification project were determined to be
valid, and completeness was greater than 90 percent. Therefore, the completeness
objective was satisfied.
4.2.4	Comparability
Comparability is a qualitative measure designed to express the confidence with
which one data set may be compared to another. Sample collection and handling
techniques, sample matrix type, and analytical method all affect comparability.
Comparability was achieved during this verification test by the use of consistent
methods during sampling and analysis, and traceability of standards to a reliable
source.
4.2.5	Representativeness
Representativeness refers to the degree to which the data accurately and precisely
represent the conditions or characteristics of the parameter being tested. For this
verification project, one field duplicate sample was collected from each sample
location and sent to the laboratory for analysis. Representativeness was
calculated as an RPD of these field duplicates. The results of these calculations
are shown in Appendix C. Sixteen out of 21 of the samples were within the
target RPD values.
The IDS for condensate sulfate for feed and condensate, and acidity for
condensate and concentrate RPDs were above their respective values. The IDS
RPD values for the two daily samples on the duplicate sampling day range from
117.0 to 16.0. The sulfate RPD values for the two daily samples on the duplicate
sampling day range from 127.3 to 16.9. The acidity RPD values for the two daily
samples on the duplicate sampling day range from 102.2 to 19.0. Variation
between the sample and the duplicate, while not extreme in nature or detrimental
9

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to the test site's process indicate variation inherent in the operation of the
evaporator
4.2.6 Sensitivity
Sensitivity is the measure of the concentration at which an analytical method can
positively identify and report analytical results. The sensitivity of a given method
is commonly referred to as the detection limit. Although there is no single
definition of this term, the following terms and definitions of detection were used
for this project.
Instrument Detection Limit (IDL) is the minimum concentration that can be
differentiated from instrument background noise; that is, the minimum
concentration detectable by the measuring instrument.
Method Detection Limit (MDL) is a statistically determined concentration. It is
the minimum concentration of an analyte that can be measured and reported with
99 percent confidence that the analyte concentration is greater than zero, as
determined in the same or a similar sample matrix.
Method Reporting Limit (MRL) is the concentration of the target analyte that
the laboratory has demonstrated the ability to measure within specified limits of
precision and accuracy during routine laboratory operating conditions. An MRL
is the lowest concentration that can be reported with confidence. The MRLs for
this verification project are shown in Table 4.
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Parameters
Test Method
Reporting
Method of
MRL
Precision
Accuracy
Completeness


Units
Determination

(RPD %)
(% Recovery)
%
Copper
EPA 200.7
mg/L
ICP-AES
0.02
<20
75-125
90
Lead
EPA 200.7
mg/L
ICP-AES
0.005
<20
75-125
90
Acidity
EPA 305.1
mg/L as
CaC03
Titration
10
<30
80-120
90
Sulfate
EPA 300.0
mg/L
Ion
chromatography
0.1
<30
90-110
90
IDS
EPA 160.1
mg/L
Gravimetric
5.0
<25
NA
90
TSS
EPA 160.2
mg/L
Gravimetric
5.0
<25
NA
90
Flow
Flow
Totalizer
L/hr
Flowmeter
0.01 L/hr
<10
NA
90
pH
EPA 150.1
pH
Electrometric
0.1
<0.2
NA
90
Conductivity
EPA 9050A
? S/cm
Wheatstone
Bridge-Type
1.0 ?s
<2
NA
90
Temperature
Electrometric
?C
Electrometric
1.0 ?c
<10
NA
90
EPA: EPA Methods and Guidance for Analysis of Water
NA = Not Applicable
Table 4. Quality Assurance Objectives
11

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4.3 Process Measurements
Process measurements and other information were collected to provide the following
data: flow, electricity use, O&M, activities, and historical discharge data. The methods
that were used for process measurements and information collection are discussed in
section 3.2.4. Certain key process measurements are discussed in the following sections.
4.3.1 Flow Measurements
The volume of wastewater processed during each sampling period was measured
using a flowmeter/totalizer. These daily results are presented in Table 5.
Dates
Volume Treated Liters (gal)
9/25/01
349,000 (92,200)
9/26/01
357,000 (94,300)
9/27/01
348,000 (91,900)
9/28/01
227,000 (59,900)*
Total
1,281,000 (338,300)
*9/28/01 test was for 16 hours
Table 5. Volumes of Wastewater Treated
4.3.2	Operation and Maintenance Labor
Site personnel operated the MVR evaporator during verification testing. The
MVR evaporator normally runs unattended. The startup and shutdown
procedures are summarized in the verification test plan [Ref. 1],
During the first day of the test, the MVR evaporator was operated in recycle mode
(the condensate and concentrate streams were returned to the feed tank) because a
transfer pump between the process and the evaporator was out of service. This
transfer pump is not a part of the MVR evaporator system. The MVR evaporator
was fully operational and no maintenance tasks were required.
4.3.3	Additional Information
Other key information was collected at the time of the verification test. The cost
of electricity was $0.0242 Canadian (CAN) ($0,015 United States (US))1 per
kWh. The cost of water was $0 .31 CAN ($0,194 US)1 per 1000 L. The labor
cost with burden was $50.00 CAN/hour ($31.35 US/hour)1.
1 Based on exchange rate - $1.00 (Canadian) = $0,627 (US Dollars) as of 1/15/02.
12

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EVALUATION OF RESULTS
5.1 Mass Balance
Mass balance calculations were performed for the constituents in the wastewater. These
results will be used as an indicator of the accuracy of the verification test. The mass
balance criterion will be satisfied when the mass balance is within the range of 75 percent
to 125 percent. The mass balance equation for calculating each constituent parameter is
shown below and the results are shown in Table 6.
mass balance (%)	=	[((Ce x Ve) + (C3 x V3)) / (Ci x Vi)] x 100%
where:
Ce	=	average condensate constituent concentration (mg/L)
Ve	=	condensate volume processed during the test period (L)
C3	=	average concentrate constituent concentration (mg/L)
V3	=	concentrate volume processed during the test period (L)
Ci	=	average feed constituent concentration (mg/L)
Vi	=	feed volume processed during the test period (L)
Example: Copper mass balance for day 2 (09/26/01) of the test
Copper mass bal. (%) = [((3.15 mg/L x 345,000 L) + (9050 mg/L x 11,300 L)) /
(240 mg/L x 357,000 L)] x 100% = 120.6%




Acidity
Date
Copper
Sulfate
TDS
(as CaC03

%
%
%
%
09/25/01
48.6
35.2
51.6
60.8
09/26/01
120.6
121.0
125.9
122.7
09/27/01
101.3
84.0
87.6
78.9
09/28/01
111.2
119.2
201.4
119.3
Table 6. Mass Balance
The mass balances are calculated on a daily bases. The mass balances for the first day
were below the mass balance accuracy criterion of 75 percent to 125 percent. This was
because the MVR evaporator was operated in recycle mode (the condensate and
concentrate streams were returned to the feed tank) due to a transfer pump between the
process and the evaporator being out of service. For the other three days, the mass
balances ranged from 78.9 percent (acidity - day three) to 201.4 percent (TDS - day
four). The mass balances for the TDS were a little over 125 percent for day two and well
over the 125 percent for day four. Over all, the mass balance calculations indicate that dl
of the mass can be accounted for within a reasonable error and the system was operating
without major upset on days 2-4. The mass balance calculation is affected by normal
concentration variations in the feed and concentration variations in the concentrate
13

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inherent in the operation of the evaporator. The mass balances for lead and TSS were not
calculated because the feed concentration for them was below detection limits. The mass
balance for lead and TSS were not calculated because the feed concentrations for these
parameters were below their detection limits.
5.2 Evaporator Workload
The evaporator workload was determined by the volume of condensate recovered per
day. The volume of the feed, condensate, and concentrate was calculated using the
computer record for the period of the testing. The computer records the flow rate every
five minutes. These data points were averaged and then used to calculate the flow rate
for a twenty-four hour period on days one, two, and three and for a sixteen hour period
for day four. The evaporator workload is shown below in Table 7.
Date
Evaporator Workload L/day (gpd.)
09/25/01
338,000 (89,300)
09/26/01
345,000 (91,100)
09/27/01
337,000 (89,000)
09/28/01
217,000 (57,300)*
Total
1,237,000 (326,700)
* 09/28/01 test was for 16 hours
Table 7. Evaporator Workload
5.3 Concentration Factor
The concentration factors are calculated on a daily basis as a qualitative measure of
system performance. The concentrate volume for a typical twenty four hour day is
11,300 L. Therefore, the concentrate volume for the day 1,2, and 3 is 11,300 L per day
and for day 4 is 7,500 L for sixteen hours. The equation for the concentration factor is
shown below and the concentration factor results are shown in Table 8.
Concentration Factor = Feed volume/Concentrate volume
Example: Concentration Factor for day 2 (09/26/01) of the test
Concentration Factor = (357,000 L) / (11,300 L) = 31.6
Date
Concentration Factor
09/25/01
30.9
09/26/01
31.6
09/27/01
30.8
09/28/01
29.8
Table 8. Concentration Factor
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5.4 Recovery Efficiency
The evaporator recovery efficiency is calculated by comparing the volume of water
recovered as condensate to the volume of water in the feed. These calculations were
performed for each daily set of analytical results. The equation for water recovery
calculation is shown below and the results are shown in Table 9.
Weff (%)	=	[(Vc/d) / (Vf)] X 100%
where:
Weff	=	water recovery efficiency
Vc/d	=	volume of condensate recovered during the test period (L)
Vf	=	feed volume processed during the test period (L)
Example: Evaporate recovery efficiency for day 2 (09/26/01) of the test
Weff(%)	=	[(345,000 L)/(357,000)] x 100%= 96.6%
Date
Recovery Efficiency %
09/25/01
96.8
09/26/01
96.6
09/27/01
96.8
09/28/01
96.6
Table 9. Recovery Efficiency
The recovery efficiencies are calculated on daily bases. The recovery efficiencies for the
evaporator range from 96.6 percent to 96.8 percent.
5.5 Separation Efficiency
The separation efficiency is calculated based on a comparison of feed and condensate
concentrations for each pollutant parameter.2 These calculations are performed for each
daily set of analytical results. The separation efficiency rate for each constituent
parameter was separately calculated. These include copper, lead, sulfate, TSS, IDS,
acidity. The equation for the separation efficiency is shown below and the results are
shown in Figure 3 and in Table 10.
2 Separation efficiency will be calculated only for parameters that are found at concentrations above reporting limits
in the feed.
15

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Cr
[((Ci X Vi) - (Cc X Vc/t)) / (Ci X Vi)] X 100%
where:
Cremove	=	average constituent separation efficiency
Ci	=	average feed constituent concentration (mg/L)
Vi	=	feed volume processed during the test period (L)
Cc =	average condensate constituent concentration (mg/L)
Vc/t	=	condensate volume processed during the test period (L)
Example: Copper separation efficiency for day 2 (09/26/01) of the test
Cr
0) = [((240 mg/L X 357,000 L)-(3.15 mg/L X 345,000 L)/(240
mg/L x 357,000 L))] x 100% = 98.7%
Copper
Separation Efficiency
100%
9/25/01
9/26/01
9/27/01
9/28/01
Date
-Sulfate
TDS
Acidity
Figure 3. Separation Efficiency
16

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Copper
Sulfate
TDS
Acidity
Date
%
%
%
%
09/25/01
99.6
99.7
97.8
98.2
09/26/01
98.7
99.1
94.9
97.3
09/27/01
99.0
99.5
97.3
97.7
09/28/01
99.2
99.2
93.9
97.0
Table 10. Separation Efficiency
The separation efficiencies are calculated on a daily bases. Pollutant separation
efficiency for the parameters ranged from 93.9 percent (IDS - day four) to 99.7 percent
(Sulfate - day one). The separation efficiencies for lead and TSS were not calculated
because the feed concentrations for these parameters were below method reporting limits.
5.6 Energy and Water Use
Energy requirements for the Hadwaco MVR Evaporator system were calculated by
summing each component of power (kW) and dividing by the volume of condensate
recovered (L) per hour. To find the energy requirements per kWh/1000 L of condensate
recovered, this total energy result was divided by 1,000. Laboratoire des Technologies
Electrochimiques et des Electrotechnologies of Hydro Quebec measured the power isage
for the four day period. The average power requirement for the four day period for the
fan = 107.5 kW, and for the mechanical control center (MCC) = 59.6 kW. The average
power requirement for the four day period to produce steam = 29 kW. For the test period
of 88 hours a total of 1,237,000 L of condensate was produced. This results in 14,100 L
of condensate being produced per hour.
where:
Pt/1,000L
[(Ef + Emcc + Es)/Vc]/1000
Pt
power for Hadwaco MVR evaporator system

(kW)
Ef
energy of fan (kW)
Emcc
energy of motor control center (kW)
Es
energy for steam (kW)
vc
volume of condensate per hour (L/hr)
Pt/1,000L
[(107.5 kW + 59.6 kW + 29.0 kW) /

14,100. L/h]/1000
Pt/1,000L
13.9 kWh/1000 L
Water use and reuse was evaluated in terms of city water consumed (L) and condensate
recovered (L). During the four day test, 187,600 L of noncontact cooling water was used
and 1,237,000 L of condensate was recovered.
17

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5.7 Operation and Maintenance Labor Analysis
The labor costs are minimal because of the fully automated design; therefore, the operator
was only required to make daily inspections of the unit and check the system operation
parameters during the test. These tasks are projected to require approximately three
hours of O&M labor per week.
5.8 Cost Analysis
This analysis is to determine the operating cost of the Hadwaco MVR Evaporator system
considering the following cost parameters: materials (e.g., filters), electricity, labor, and
water usage. Costs were calculated separately for each cost parameter for the test run and
expressed in dollars3 per thousand liters processed ($/1000 L) by dividing the cost by the
total volume of condensate processed for a given test run. The cost is based on an 88-
hour period of testing.
The energy cost is based on 13.9 kWh electricity used for a thousand liters of condensate
at a cost of $0,015 /kWh. The energy cost is calculated to be $0,209 by multiplying 13.9
kWh/1000 L times $0,015 /kWh to give an electric cost per thousand liters of condensate.
The system noncontact cooling water cost is $0,029 per thousand liters of condensate.
This is based on using 152 L of noncontact cooling water per thousand liters of
condensate with water cost of $0,194/1000 L. There was an expenditure of 1.6 hours of
labor during testing at a cost of $31.35/hour. Dividing by the total volume of condensate
recovered, this results in a labor cost of $0,041 per thousand liters of condensate.
Total costs for a thousand liters of condensate during the test run is calculated by
summing the individual cost elements. The calculation of treatment cost for the test run
is shown below.
where:
Cevaporation cost	[M + E + W + L]
Cevaporation cost	=	total operating cost for test run ($/1000 L)
M	=	cost of materials for test run ($/l 000 L)
E	=	cost of electricity for test run ($/l 000 L)
W	=	cost of water for test run ($/1000 L)
L	=	labor cost for test run ($/1000L)
Cevaporation cost = 0 + $0.209/1000 L + $0.029/1000 L + $0,041 /1000 L
= $0,279/1000 L
The host facility installation is a separate installation in a stand-alone structure with a
capital cost of $1,400,0004 (US) for the Hadwaco MVR Evaporator. The cost includes
the Hadwaco MVR Evaporator, storage tanks, climate control building, interconnecting
piping and electrical conduit, electrical control room automation/instrumentation,
3
Based on an exchange rate of $1.00 (Canadian) = $0,627 (US Dollars) as of 1/15/02.
The data was provided by the host facility and was not verified.
18

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programmable logic controller (PLC), and total integration into the existing plant control
system.
The annual operating cost of the Hadwaco evaporator system is $31,700. The individual
cost elements are shown in Table 11.
Item

Units
Unit Cost
$/unit
Cost
$
Electricity for evaporator
system
1,569,310
kWh/1000 L
0.0152
23,854
O&M labor
144
hr
31.35
4,515
Cooling water
17161
L/1000L
0.194
3,329
Total



31,698
Table 11. Annual Operating Cost
The savings and benefits5 of the Hadwaco MVR Evaporator at the host facility are
included below.
The amount of cleaner used in the process was reduced because the evaporator provides
cleaner water for rinsing after the pickling operation with significantly less dragout into
the cleaner. The number of cleaner changes was reduced from once per week to once
every six weeks. This also reduced the amount of spent cleaner generated that required
treatment as hazardous waste.
The evaporator system efficiently recovers heat from the process resulting in a significant
reduction in energy lost in the overall system. The entire operating temperature was
reduced by nearly 20°C because of the installation of the evaporator system. This
resulted in an approximately thirty five percent reduction in steam consumption used by
the host facility. In addition, warm condensate, which comes from the evaporator,
performs better in removing contaminant from the product.
The above two items resulted in reducing rejected product by approximately one to four
percent and make it possible in the future to increase the process line production rate by
approximately ten percent without additional rinsing equipment or flow..
The main reasons the host facility purchased the Hadwaco MVR Evaporator were to
improve the quality of the product, improve output of the process, reduce chemical usage,
and reduce wastewater treatment. They did not justify the purchase with just the
reduction of waste treatment costs. With this evaporator, the host facility achieved their
goal of reducing product reject through improving cleaning of the product. They also
achieved other benefits such as reduction in plant energy consumption, reduction of
process makeup water (from a reverse osmosis system), and reduction of potentaial
pollutant releases to the atmosphere.
5 The data was provided by the host facility and was not verified.
19

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5.9	Environmental Benefit
The environmental benefit of the evaporator is calculated by extrapolating annual water
and material savings from test period data and estimating the kilograms of waste that
would have been generated without the evaporator.
The evaporator is operated as a totally automated closed-loop system; both the
concentrate and condensate are returned to the process. The energy costs are very low
because the system utilizes the latent heat in the feed and the condensate (feed
temperature is approximately 46°C). The system uses no materials other than some
steam and noncontact cooling water. The only waste stream produced is noncontact
cooling water.
Using the average data of the last three days of the testing and based on the host facility's
seven days/forty-eight weeks of operation, the Hadwaco MVR Evaporator system had the
following material saving. The system could eliminate the need to treat 116,600,000 L
per year of process wastewater. In addition, 112,900,000 L of water per year is projected
to be saved by using the condensate as make-up water for the process. The evaporator
system produces a condensate that allows the host facility to effectively electrowinn
copper from the concentrate waste stream. Thus, it is projected that the host facility
evaporator system in combination with electrowinning could prevent approximately
23,900 kg/year of copper (based on an average feed concentration of 205 mg/L) and
170,700 kg/year of sulfate (based on an average feed concentration of 1462 mg/L) from
being treated as wastes. The copper maybe recovered as metallic copper through
electrowinning and sold as scrap metal, and a projected 99,700 L of recovered sulfuric
acid is reused in the process.
5.10	Project Responsibilities/Audits
Verification testing activities and sample analysis were performed according to section
6.0 of the verification test plan [Ref. 1],
The audit conducted on this verification test was an internal CTC Technical Systems
Audit (TSA) conducted by Mr. John R. Thorns, CTC Quality Assurance, on September
25-26, 2001. Mr. Thorns identified no Findings, five Observations, and three Additional
Technical Comments. All corrective actions were complete as of the end of the
verification test.
20

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6.0 REFERENCES
1.	Concurrent Technologies Corporation, "Environmental Technology Verification
Program for Metal Finishing Pollution Prevention Technologies Verification Test
Plan, Evaluation of Hadwaco MVR Evaporator for the Metal Finishing Industry,"
September 20, 2001.
2.	Concurrent Technologies Corporation, 'Environmental Technology Verification
Program Metal Finishing Technologies Quality Management Plan" Revision
1, March 26, 2001.
21

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APPENDIX A
PRECISION CALCULATIONS

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PRECISION CALCULATIONS
Laboratory II)
CTC ID
Parameter
Units
Sample
Value
Duplicate
Value
RPD %
RPD %
Limits
RPD Met?
Y/N
52359-37
D2.2
PH
NA
2.1
2.2
4.7
<40
Y
52359-21
C2.2
PH
NA
<1.0
<1.0
0.0
<40
Y
52359-38
D3.1
PH
NA
1.9
2.9
43.0
<40
N
52359-22
C3.1
PH
NA
1.0
1.0
0.0
<20
Y
53259-9
F1.2Dup.
TDS
mg/L
3100
2620
16.8
<25
Y
53259-42
D1.2 Dup.
TDS
mg/L
50
50
0.1
<25
Y
53259-26
CI.2 Dup.
TDS
mg/L
25000
24100
3.7
<25
Y
53259-35
F1.2
TSS
mg/L
<5.0
<5.0
0.0
<25
Y
53259-9
F 1.2 Dup.
TSS
mg/L
12.0
15
22.2
<25
Y
53259-26
CI.2 Dup.
TSS
mg/L
78
96
20.7
<25
Y
52359-12

Sulfate
mg/L
10267
10165
1.0
<30
Y
52359-44

Sulfate
mg/L
10164
10184
0.2
<30
Y
53259-39
D3.2
Acidity
mg/L
54
56
3.6
<30
Y
NA = Not Applicable
Laboratory II)
CTC ID
Parameter
Units
Sample
+ Spike
Value
Duplicate
+ Spike
Value
RPD
%
RPD %
Limits
RPD Met?
Y/N
53259-14& 15
Fl.lDup.
TDS
mg/L
12660
12640
0.2
<25
Y
53259-46&47
D1.2 Dup.
TDS
mg/L
10150
10010
1.4
<25
Y
53259-30&31
CI.2 Dup.
TDS
mg/L
34810
34820
0.1
<25
Y
53259-14& 15
Fl.l
Sulfate
mg/L
2963
2999
1.2
<30
Y
53259-30&31
Cl.l
Sulfate
mg/L
a.
a.
NC
<30
NC
53259-46&47
D1.2
Sulfate
mg/L
202
213
5.3
<30
Y
53259-14& 15
Fl.l
Metal Copper
mg/L
a.
a.
NC
<20
NC
53259-14& 15
Fl.l
Metal Lead
mg/L
1.021
1.031
0.1
<20
Y
53259-46&47
Dl.l
Metal Copper
mg/L
1.167
1.156
2.0
<20
Y
53259-46&47
Dl.l
Metal Lead
mg/L
1.052
1.030
1.6
<20
Y
53259-10
Field Blank
Metal Copper
mg/L
1.009
0.993
0.1
<20
Y
53259-10
Field Blank
Metal Lead
mg/L
1.005
0.990
1.5
<20
Y
a. = The recoveries of the matrix spikes are outside advisory limits due to abundance of target analyte in sample.
NC = Not Calculated
A-l

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APPENDIX B
ACCURACY CALCULATIONS

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ACCURACY CALCULATIONS
CTC
Parameter
Units
Sample
Sample
Spike
Recovery
Target %
Accuracy
Sample


Value
+Spike
Value
%
Recovery
Met? Y/N
ID



Value




F 1.1
Lead
mg/L
0.099
1.021
0.922
92
80 -120
Y
F 1.1
Lead
mg/L
0.099
1.031
0.932
93
80 - 120
Y
C 1.1
Lead
mg/L
2.7
a.
1.000
119
80 - 120
NC
C 1.1
Lead
mg/L
2.7
a.
1.000
118
80 - 120
NC
D 1.1
Lead
mg/L
<0.005
1.052
1.000
105
80 - 120
Y
D 1.1
Lead
mg/L
<0.005
1.030
1.000
103
80 - 120
Y
Field Blank
Lead
mg/L
<0.005
1.005
1.000
100
80 - 120
Y
Field Blank
Lead
mg/L
<0.005
0.992
1.000
99
80-100
Y
F 1.1
Copper
mg/L
97
a.
1.000
NC
80 -120
NC
F 1.1
Copper
mg/L
97
a.
1.000
NC
80 - 120
NC
C 1.1
Copper
mg/L
6800
a.
1.000
NC
80 - 120
NC
C 1.1
Copper
mg/L
6800
a.
1.000
NC
80 - 120
NC
D 1.1
Copper
mg/L
0.194
1.167
0.973
97
80 -120
Y
D 1.1
Copper
mg/L
0.194
1.156
0.962
96
80 - 120
Y
Field Blank
Copper
mg/L
<0.2
1.009
1.000
101
80 - 120
Y
Field Blank
Copper
mg/L
<0.2
0.999
1.000
100
80 - 120
Y
F 1.2 Dup.
TDS
mg/L
2620
12660
10000
100
80 - 120
Y
F 1.2 Dup.
TDS
mg/L
2600
12640
10000
100
80-100
Y
C 1.2 Dup.
TDS
mg/L
24100
34810
10000
107
80 - 120
Y
C 1.2 Dup.
TDS
mg/L
24100
34820
10000
107
80 - 120
Y
D 1.2 Dup
TDS
mg/L
50
10150
10000
101
80 - 120
Y
D 1.2 Dup.
TDS
mg/L
50
10010
10000
100
80 - 120
Y
F 1.1
Sulfate
mg/L
1361
2963
1600
100
75 - 125
Y
F 1.1
Sulfate
mg/L
1361
2999
1600
102
75 - 125
Y
C 1.1
Sulfate
mg/L
44000
a.
4000
NC
75 - 125
NC
C 1.1
Sulfate
mg/L
44000
a.
4000
NC
75 - 125
NC
D 1.1
Sulfate
mg/L
13.2
202
200
94
75 - 125
Y
D 1.1
Sulfate
mg/L
13.2
213
200
100
75 - 125
Y
a. = The recoveries of the spikes are outside advisory limits due to abundance of target analyte in sample.
NC = Not Calculated
B-l

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APPENDIX C
REPRESENTATIVENESS CALCULATIONS

-------
RESPRESENTATIVENESS CALCULATIONS
CTC
Parameter
Units
Sample
Duplicate
Duplicate
%
RPD %
RPD Met?
ID


Value
crcro
Value
Difference
Limits
Y/N
F 1.2
PH
NA
1.5
F 1.2 Dup.
1.8
18.2
20
Y
D 1.2
PH
NA
3.7
D 1.2 Dup.
3.2
14.5
20
Y
C 1.2
PH
NA
1.0
C 1.2 Dup.
1.2
18.2
20
Y
F 1.2
TDS
mg/L
2600
F 1.2 Dup.
3100
17.5
25
Y
D 1.2
TDS
mg/L
28
D 1.2 Dup.
50
56.4
25
N
C 1.2
TDS
mg/L
27000
C 1.2 Dup.
25000
7.7
25
Y
F 1.2
TSS
mg/L
12
F 1.2 Dup.
15
22.2
25
Y
D 1.2
TSS
mg/L
<5.0
D 1.2 Dup.
<5.0
0.0
25
Y
C 1.2
TSS
mg/L
69
C 1.2 Dup.
78
12.2
25
Y
F 1.2
Sulfate
mg/L
6300
F 1.2 Dup.
3300
62.5
30
N
D 1.2
Sulfate
mg/L
7.2
D 1.2 Dup.
13.4
60.2
30
N
C 1.2
Sulfate
mg/L
38000
C 1.2 Dup.
46000
27.3
30
Y
F 1.2
Acidity
mg/L
3400
F 1.2 Dup.
3600
5.7
30
Y
D 1.2
Acidity
mg/L
46
D 1.2 Dup.
130
95
30
N
C 1.2
Acidity
mg/L
45000
C 1.2 Dup.
23000
64.7
30
N
F 1.2
Copper
mg/L
790
F 1.2 Dup.
780
1.3
20
Y
D 1.2
Copper
mg/L
1.9
D 1.2 Dup.
2.0
5.1
20
Y
C 1.2
Copper
mg/L
6400
C 1.2 Dup.
6700
4.5
20
Y
F 1.2
Lead
mg/L
0.38
F 1.2 Dup.
0.40
5.1
20
Y
D 1.2
Lead
mg/L
<0.005
D 1.2 Dup.
<0.005
0.0
20
Y
C 1.2
Lead
mg/L
2.6
C 1.2 Dup.
<2.5
3.9
20
Y
NA = Not Applicable
C-l

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