August 2013 Emerging Technologies
Emerging Technologies
for Wastewater Treatment and
In-Plant Wet Weather Management
Prepared by:
Office of Wastewater Management
U.S. Environmental Protection Agency
Washington, D.C.
EPA 832-R-12-011 Addendum
August 2013
&EPA
United States
Environmental Protection
Agency
Wastewater Treatment and In-Plant Wet Weather Management AD-1
-------
Emerging Technologies
Preface
The U.S. Environmental Protection Agency (U.S. EPA) is charged by Congress with protecting
the nation's land, air, and water resources. Under a mandate of environmental laws, the
Agency strives to formulate and implement actions leading to a balance between human
activities and the ability of natural systems to support and sustain life. To meet this mandate,
the Office of Wastewater Management (OWM) provides information and technical support to
solve environmental problems today and to build a knowledge base necessary to protect public
health and the environment in the future.
The original document was published in February 2008 under document number EPA 832-R-
06-006, and the first update to this document with the new document number EPA 832-R-12-
011, was released in March 2013. The March 2013 publication was produced, under contract
to the U.S. EPA, by the Tetra Tech Corporation, and it provides current information and state of
development as of the publication date. It is expected that this document will be revised
periodically to reflect advances in this rapidly evolving area. This addendum, published in
August 2013, was developed by the Office of Wastewater Management, US EPA to reflect new
and more current information. The new information has been supplied by the manufactures or
vendors and has not been verified by the EPA, Tetra-Tech, or the technical review expert
panel.
For this addendum, information, interviews, and data development were conducted by the U.S.
EPA. Some of the information, especially related to emerging technologies, was provided by
the manufacturer or vendor of the equipment or technology, and could not be verified or
supported by full scale case studies. In some cases, cost data were based on estimated
savings without actual field data. When evaluating technologies, estimated costs, and stated
performance, efforts should be made to collect up to date information.
The mention of trade names, specific vendors, or products does not constitute an actual or
presumed endorsement, preference, or acceptance by the U.S. EPA or the Federal
Government. Stated results, conclusions, usage, or practices do not necessarily represent the
views or policies of the U.S. EPA.
Wastewater Treatment and In-Plant Wet Weather Management AD-2
-------
Emerging Technologies
Overview
This addendum has been developed to provide the latest updates to technologies included in
the EPA's Emerging Technologies for Wastewater Treatment and In Plant Wet Weather
Management (EPA 832-R-12-011) published in March of 2013. New information was received
on the following technologies after the publication date. However, the EPA believes that the
new information is important and/or better represents the actual performance of the
technologies.
Compressible Media Filtration (FlexFilter™ and Bio-Flex Filter™ manufactured by
WWETCO®). This addendum provides information that replaces and updated the
information found in Chapter 2, pages 2-10 to 13 and Chapter 4, pages 4-4 to 4-7
of the March 2013 edition to the document.
Biological Double-efficiency Process (manufactured by BDP EnvirroTech®). This
addendum provides new information that was not available at time of publication.
This new information supplements the information found in Chapter 3 of the March 2013
edition to the document.
Alternative Disinfection (Solyay Chemicals NA/PERAGreen Solutions™). This
addendum provides new contact information for Solvay Chemicals Chemical and
replaces the information found in Chapter 2, page 2-27 and Chapter 4, page 4-17 of the
March 2013 edition to the document.
Additional updates and/or addendums to this document will be considered as new technologies
or more current information becomes available.
Wastewater Treatment and In-Plant Wet Weather Management AD-3
-------
Emerging Technologies
Contents
Preface AD-2
Overview AD-3
List of Figures AD-4
Compressed Media Filtration (CMF) revised fact sheet (see Emerging Technologies for
Wastewater Treatment and In-Plant Wet Weather Management EPA 832-R-12-011)
published March 2013 (replaces pages 2-10 to 2-13 and pages 4-4 to 4-7) AD-5
Biological Double-efficiency Process (BDP) new fact sheet AD-10
Alternative Disinfection [Peracetic Acid (PAA) and BCDMH] revised fact
sheet (see Emerging Technologies for Wastewater Treatment and In-Plant
Wet Weather Management EPA 832-R-12-011) published March 2013
(replaces pages 2-27 and 4-17) AD-15
List of Figures
Figure 1: Multi-Function FlexFilter™ for Tertiary Filtration and Excessive
CSO/SSO Flow Treatment AD-6
Figure 2: Multi-Function Bio-FlexFilter™ As Enhanced Primary and Excess
Wet Weather Flow Treatment AD-6
Figure 3: BDPtm Hydraulic Circulations System Compared To Conventional Processes
Circulation Systems AD-12
Figure 4: Nonstop and Simple Aeration Operation AD-12
FigureS: Influent/Effluent Data After Upgrade To The Tianjin WWTP AD-13
Figure 6: After Upgrading Original A/0 Basins by BDP™ Technology, BAF
Tanks And Secondary Sedimentation Tanks Are Eliminate And The Footprint
Is Cut In Half AD-13
Wastewater Treatment and In-Plant Wet Weather Management AD-4
-------
August 2013
Emerging Technologies
Treatment
prepared 2013
Technology Summary
State of Development:
Innovative.
Compressible Media Filtration (CMF)
Objective:
Multifunction, passive, high-rate filtration for wet-
and dry-weather treatment applications.
Description:
The Compressible Media Filtration (CMF) technology was originally developed in the mid-1980's as a tertiary
treatment process. In the mid 90's the technology was first implemented as a treatment method to process
combined sewer overflows (CSOs) before UV disinfection in Columbus, GA, under an EPA funded grant and
its performance was peer reviewed by the Water Environment Research Foundation (WERF, 2001).
This pioneering application by the Columbus Waterworks, Columbus, GA, through the use of the CMF
technology as part of the Columbus CSO Advanced Demonstration Facility, was recognized by EPA, WERF
and other public, professional and technical groups as a scientific and engineering innovation for controlling,
treating and disinfecting combined sewer system discharges. The CMF technology has since been applied to
other CSO systems, storm water controls, and is being considered for control and treatment of separate
sanitary sewer overflows (SSOs).
High rate media bed filtration technologies similar to CMF are currently being used for wet weather treatment
in Japan in at least 20 installations with capacities ranging up to approximately 100 MGD (Fitzpatrick et al.,
2012). Two CMF facilities treating CSO's have been operational in Atlanta, GA, (20 and 85 MGD) since mid-
2000. The CMF was applied to storm water in 2007 (WWETCO, 2008). The largest CMF facility in the US
(100 MGD) is under construction in Springfield, OH for CSO treatment with provisions for tertiary filtration and
phosphorous control in the future (Fitzpatrick et al., 2011).
The two CMF technologies are the Fuzzy Filter™ manufactured by Schreiber and the FlexFilter™,
manufactured by WesTech Engineering. The Fuzzy Filter™ was developed along the Japanese model in
which the media is compressed in the direction of flow whereas the FlexFilter
The FlexFilter™ will be highlighted in this Technology Summary.
.TM
uses a lateral compression.
The WWETCO FlexFilter™ and Bio-FlexFilter™ use a synthetic fiber media bed that is passively compressed
from the sides by the head of the incoming water. The lateral compression forms a cone-shaped porosity
gradient that allows the stratification and removal of large and small particles from the top to the bottom of the
media bed. The porosity gradient through the media bed, with its ability to handle heavy solids loading, gives
the technology a wide range of uses. The filter can be used to:
1. Produce a reuse quality effluent as a tertiary filter including direct metal salt addition for phosphorous
trimming;
2. Increase the organic removal capacity of a facility, and/or reduce its power consumption as an
enhanced primary process; and
3. Treat excess wet-weather flow including biological treatment, when coupled with one of the two dry
weather process operations as delineated in 1 and 2, above.
The first two functions are accomplished during dry weather, usually by a portion of the filter matrix. Dual-use
filter concepts are shown in Figures 1 & 2. The entire matrix is sized for the worst case solids loading. Under
one dual-use process train, during dry weather, part of the matrix acts as a tertiary filter (Figure 1 - left side)
and the remaining portion is used for the common wet weather events (Figure 1 - right side). Generally, the
entire filter matrix would be sized to handle the peak events. The tertiary filter cells can also be utilized to
effectively remove or trim phosphate created by addition of metal salts directly to the filter influent, if and when
needed. The filter cells are easily switched from one function to the other as the excess flow increases or
decreases.
Another dual-use function is shown in Figure 2 where the filter is operated to enhance primary treatment and
thus reduce loadings to the secondary portion of the plant. There are sufficient nutrients and oxygen cycling
Wastewater Treatment and In-Plant Wet Weather Management
AD-5
-------
August 2013
Emerging Technologies
Compressible Media Filtration (CMF) (continued)
Dry Weather Tertiary Filtration
including Phosphorous Control
Preliminary
Treatment
Filtration of CSOs/SSOs using All or a
Portion of the Filter Cell Matrix
Excess Wet Weather
Flow (WWF)
Preliminary
Treatment
Primary
Clarifier
Biological
Treatment
Secondary
Clarifier
Disinfection
Backwash
A
Seco
Efflu
i
FlexFilter™
rtdary
ent
•/ Metal Salt for
Phosphorous
Removal
\
\
Reuse Quality
Filter Effluent
Primary
Clarifier
Biological
Treatment
Secondary
Clarifier
Disinfection
Backwa
Filtered Wet Weather
Effluent (TSSOO mg/l)
Figure 1. Multi-Function FlexFilter™ for Tertiary Filtration and Excessive
CSO/SSO Flow Treatment.
Dry Weather Enhanced Primary Treatment
for Energy Savings and Organic Capacity
Preliminary
Treatment
Primary
Clarifier
Biological
Treatment
Biological Filter Treatment of
Excess Wet Weather Flow
V
s
\
f
Bio-FlexFilter™
Backwash
Secondary
Clarifier
Disinfection
0
Thickening &
Anaerobic
Digestion
Preliminary
Treatment
Primary
Clarifier
Biological
Treatment
Secondary
Clarifier
Disinfection
Excess Wet Weather
Flow (WWF)
Thickening &
Anaerobic
Digestion
Figure 2. Multi-Function Bio-FlexFilter™ as Enhanced Primary
and Excess Wet Weather Flow Treatment.
Wastewater Treatment and In-Plant Wet Weather Management
AD-6
-------
August 2013
Emerging Technologies
Compressible Media Filtration (CMF) (continued)
from the operation of the Bio-FlexFilter™ that it supports a healthy biofilm population in the media bed that
reduces soluble organics as well as particulates from both dry and wet weather flows. The removals during
wet weather conditions are generally sufficient to satisfy sanitary system secondary effluent limits.
One continuous treatment trial filtering primary influent for6-months, impacted by CSOs, showed a consistent
38% soluble and a 70% total carbonaceous biochemical oxygen demand (CBOD5)) removal (WWETCO,
2012). The filter performance in this comprehensive study compared favorably to that of other high-rate
treatment technologies that have successfully demonstrated their long term ability to increase the peak flow
treatment capacity of secondary treatment facilities (Fitzpatrick et al., 2008).
One of the advantages of the FlexFilter™ is that it does not require chemicals to treat the excess flow. It also
operates as a safety net behind secondary clarifiers to push higher flows through the secondary without the
risk of losing plant biomass, which is captured by the filter and returned (Fitzpatrick et al., 2012).
A filter cell treating wet weather or primary type solids uses the neighboring filter effluent for backwash supply.
When treating a waste with low solids (primary or secondary effluent), the filter cell can use the influent water
as backwash supply. Low head air scrubs the media and lifts the spent backwash into the backwash trough to
waste. Backwash from the filter would normally be routed to the plant influent; backwash from the biofilter
would normally be sent to solids processing. Excess biological growth is controlled with a dilute chlorine
(3 mg/L) solution added to the backwash.
The passively operated matrix of the FlexFilter™ cells works with simple flow and level logic controls, open-
close valves, and a low-head blower for cleaning and pumping the spent backwash water to waste. The
multifunction filter makes this technology very attractive for satisfying current and future regulatory mandates
for phosphorous control, excess wet-weather treatment and as an intermediate wastewater treatment step to
reduce overall plant energy consumption and/or increase plant organic treatment capacity. A trial in Atlanta,
GA, (McKern, 2004), showed that the FlexFilter™ is suitable for removal of TSS from raw CSO flow (75% to
94%) and sedimentation basin effluent (35%). The Bio-FlexFilter™ is suitable for meeting secondary
treatment effluent criteria for CBOD5 and TSS (effluent less than 30 mg/L each) for wet-weather flows
(WWETCO 2012).
Sizing of the filter matrix is a function of hydraulic and solids loading and the available head. Peak hydraulic
loading rates (HLRs) range from 10 to 20 gpm/sq ft, with the lower end for high-strength wastewaters like
CSOs and primary influent sewage. The higher HLR would apply to the more dilute solids concentrations such
as for tertiary filtration or for dilute wet weather filtration. Chemically assisted phosphorous removal HLR is 5 to
10 gpm/sq ft, depending on the concentration of metal salt/soluble phosphorous precipitate required.
Biological treatment was demonstrated at 5 gpm/sq ft HLR.
For CSO or primary influent applications, the footprint of the concrete filter structure (10 MGD) including
influent/effluent channels and operating and backwashing cell chambers would be less than 210 sq ft per
MGD (WWETCO, 2012). A smaller footprint would be used for SSO or tertiary applications. For plants larger
than 10 MGD, the filter system footprint decreases with increasing flows. Also according to the manufacturer,
the filter matrix footprint can be reduced by about one-third by incorporating the influent and effluent channels
above the filter cells. Further consolidation can be realized by placing the disinfection facilities above and
backwash attenuation below the filter structure. The depth of the typical high solids filter is about 14 feet, but
can be reduced by 30% with the consolidation described above. Steel tank tertiary filters are 6 feet tall.
Existing filter basins at 6- and 7-foot depths can typically be retrofitted to accommodate multiple cells at one-
half the area of a typical structure.
Comparison to Established Technologies:
According to Frank and Smith (2006) the WWETCO FlexFilter™ technology provided comparable effluent
TSS (49 mg/L to 52 mg/L) with the ballasted flocculation systems in side-by-side testing. However,
ballasted flocculation requires chemicals and ramp-up time (15 to 30 minutes) to achieve performance
objectives.
Wastewater Treatment and In-Plant Wet Weather Management
AD-7
-------
August 2013
Emerging Technologies
Compressible Media Filtration (CMF) (continued)
In treating high strength CSOs (flush concentrations greater than 500 mg/l TSS) for 16 events, the maximum
effluent Total Suspended Solids (TSS) was 36 mg/l; the 80th percentile was 22 mg/l and the 60th percentile
was 50 mg/l. For the same testing the Carbonaceous Biochemical Oxygen Demand (CBOD5) had an average
value of 26 mg/l with a standard deviation of 15 mg/l (Fitzpatrick et al, 2011). The VWVETCO FlexFilter™ can
meet similar or better TSS removals, requires no chemicals, and immediately achieves performance
objectives.
The FlexFilter™ starts drained and ends drained without odor issues, without special startup protocols, and
without special attention to mechanical equipment. Although the WWETCO filter footprint is generally
somewhat larger than the footprint for ballasted sedimentation, it is roughly half as deep. Further consolidation is
possible, as described above, and the wet weather treatment structure including disinfection can be located
below ground in a smaller footprint than comparable technologies, and it is amenable to remote satellite
applications. Remote unmanned wet weather treatment technologies that meet water quality criteria require far
less infrastructure capital and operation resources than storage/transport/treatment solutions. The FlexFilter™
throughput for tertiary filtration is in the order of 98 percent (WWETCO, 2012). Average throughput for CSO is
about 95 percent (< 5% backwash per McKern, 2004). The throughput for chemically assisted phosphorous
filtration and biofiltration is in the order of 90 and 80 percent respectively (WWETCO, 2012).
Available Cost Information:
Approximate Capital Cost: Equipment includes the filter media bed (all internal structural metals, media,
compression bladder, and airdiffuser), complete controls, valves/gates and actuators and blower package
with redundancy. Equipment costs vary with the scale of the facility. Smaller flows will result in greater
redundancy because of the minimum size of the equipment. Unit costs decrease with increasing flows above
10 MGD. Equipment costs for the 10-MGD filter matrix can be generalized as follows:
Application
Tertiary filter
SSO and primary effluent
CSO and influent
Estimated equipment cost ($ per gallon capacity)
Less than $0.06
Less than $0.07
Less than $0.09
Approximate O&M Costs: Operation costs are summarized as follows (WWETCO, 2012):
1. Tertiary filtration - 10 kW per MGD treated (20 mg/L TSS influent)
2. SSO or primary effluent - 35 kW per MGD treated (100 mg/L TSS influent)
3. CSO or primary influent - 60 kW per MGD treated (200 mg/L TSS influent)
Vendor Name
WWETCO, LLC
3665 South West Temple
Salt Lake City, UT84115
Telephone: (801) 265-1000
Attention: Mark Boner
Email: info@westech-inc.com
Web Site: http:/www.wwetco.com
Installations
FlexFilter™
Columbus, GA
Heard County Water Authority, Franklin, GA
Lamar, MO
Springfield, OH (2012)
Bioi-FlexFilter™
Manila, Philippines
Wastewater Treatment and In-Plant Wet Weather Management
AD-8
-------
August 2013
Emerging Technologies
Compressible Media Filtration (CMF) (continued)
Key Words for Internet Search:
Wet weather filtration, CSO, SSO, bio-filtration, enhanced primary filtration, intermediate wastewater treatment,
roughing filter, HRT - High Rate Treatment, phosphorus removal, tertiary filtration, CMF - compressible media
filter.
Data Sources:
Arnett, C.A., et al., "Bacteria TMDL Solution To Protect Public Health And Delisting Process in Columbus, GA,"
WEFTEC, 2006.
Fitzpatrick, J.; Long, M.; Wagner, D.; Middlebrough, C. (2008) Meeting Secondary Effluent Standards at Peaking
Factors of Five and Higher, Proceedings of the 81st Annual Water Environment Federation Technical Exhibition
and Conference, Chicago, IL.
Fitzpatrick J.; Gilpin, D.; Kadava, A.; Kliewer, A.; Pekarek, S.; Schlaman, J.; Tarallo, S. (2010) Wet-Weather Pilot
Studies Demonstrate Effectiveness of High-Rate Filtration Technologies. Proceedings of the 2010 Water
Environment Federation Technical Exhibition and Conference; New Orleans, Louisiana.
Fitzpatrick J.; Weaver, T.; Boner, M.; Anderson, M.; O'Bryan, C.; Tarallo, S. (2011) Wet-Weather Piloting Toward
the Largest Compressible Media Filter on the Planet. Proceedings of the 2011 Water Environment Federation
Technical Exhibition and Conference; Los Angeles, California.
Fitzpatrick J.; Bradley, P.J.; Duchene, C.R.; Gellner II, J.; O'Bryan Jr., C.R.; Ott, D.; Sandino, J.; Tabor, C.W.;
Tarallo, S. (2012) Preparing for a Rainy Day - Overview of Treatment Technology Options for Wet-Weather Flow
Management. Proceedings of the 2012 Water Environment Federation Technical Exhibition and Conference;
New Orleans, Louisiana.
Frank, D.A., and Smith III, T.F.; "Side by Side by Side, The Evaluation of Three High Rate Process Technologies
for Wet Weather Treatment," WEFTEC, 2006.
McKern, R. et al., "Atlanta CSO Pilot Plant Performance Results," WEFTEC, 2004.
WERF, Peer Review: Wet Weather Demonstration Project in Columbus, Georgia, Co-published: Water
Environment Research Foundation, Alexandria, VA, and IWA Publishing, London, U.K., 2003.
WWETCO, Boner, M., personal communication with Tetra-Tech, 2012.
WWETCO, Boner, M., personal communication with James Wheeler, EPA, 2013.
Treatment
prepared 2013
Technology Summary
Wastewater Treatment and In-Plant Wet Weather Management
AD-9
-------
August 2013
Emerging Technologies
Biological Double-efficiency Process (BDP)®
State of Development
Innovative.
Objectives:
The Biological Double-efficiency Process (BDP®) is a
continuous biological wastewater treatment technology
incorporating full Simultaneous Nitrification/Denitrification (SND).
•v- Increase the efficiency by at least 100% or more for biological organic matters removal, including nitrogen
removal from nitrogenous streams (e.g., municipal sewage, industrial wastewater).
•v- Reduce energy consumption by 50% or more.
•v- Reduce carbon dioxide emissions by 50% or more.
•v- Reduce the amount of sewage sludge produced during treatment by 40% or more compared to other
conventional processes.
•v- Reduce the footprint by about 50%.
> Reduce O&M cost by about 30%.
State of Development:
Over 20 full-scale installations have been installed in China, including domestic sewage treatment plants
(WWTPs) and industrial wastewater treatment facilities (e.g., petrochemical, oil refinery, textile and dyestuff,
Pharmaceuticals and personal care products, industrial wastewater with high concentrations of toxic chemicals,
etc.).
Description:
The Biological Double-efficiency Process (BDP®) is the world's first full range Simultaneous
Nitrification/Denitrification (SND) process. The BDP® technology involves both nitrification and denitrification
occurring in a single bioreactor. The most common biological process completes the objective of nitrogen removal
by both ammonia oxidation and nitrate/nitrite reduction to nitrogen gas. The autotrophic organisms use oxygen as
the electron acceptor, to oxidize the ammonia in the aerobic environment. The heterotrophic organisms use
nitrate/nitrite as the electron and carbon from organic compounds, prefer low to zero dissolved oxygen (DO), and
are responsible for denitrification. The biological processes commonly used to remove the biological nitrogen
consist of an aerobic process for nitrification and an anoxic process for denitrification. By controlling and keeping
the DO concentration at a very low level (at an average of 0.3 mg/L), an oxygen concentration gradient across the
floe-forming bacteria will be created. The activated-sludge floe will be only partially aerobic. Denitrification occurs
in the anoxic zones established within the floe particles due to oxygen depletion. Therefore, both aerobic and
anoxic conditions can be established inside a single bioreactor. Under these conditions, both the nitrification and
denitrification microorganisms can prevail in performing their associated biological transformations. The SND
process results in a reduction of the footprint, carbon, oxygen, energy, and alkalinity consumption compared to a
conventional biological nitrogen removal process.
During long-term pilot project testing, the short-cut nitrification/denitrification also occurred in the SND process
system (short-cut SND represents 40% of the total SND). Ammonia was just oxidized to nitrite. Without nitrate as
the intermediate, nitrite will be reduced to nitrogen gas directly. These processes are termed short-cut
nitrification/denitrification. According to the stoichiometry, the short-cut nitrification can reduce the oxygen
consumption by 25% and the carbon consumption by 40% compared to a conventional nitrification/denitrification
process.
Applications:
The BDP® process has been successfully implemented as a main stream biological treatment process for
retrofitting and building new domestic sewage treatment plants and industrial wastewater treatment facilities (e.g.,
petrochemical, oil refinery, textile and dyestuff, Pharmaceuticals and personal care products, industrial
wastewater with high concentrations of toxic chemicals, etc.).
Process Control:
The main process controls include tracking: dissolved oxygen (DO at around 0.3 mg/L) and sludge concentration
(MLSS at around 8 mg/L). A special aeration system is applied in the BDP® process as the oxygen distributer to
create a low DO and micro-mixed condition. The monitored dissolved oxygen is also used for the automatic
control of the blow volume of blowers and reflux ratio. A high sludge concentration with low food/microorganisms
Wastewater Treatment and In-Plant Wet Weather Management
AD-1O
-------
August 2013
Emerging Technologies
Biological Double-efficiency Process (BDP) ® (continued)
ratio, results in smaller sludge floes that can maintain a just sufficient aerobic condition in a low dissolved oxygen
concentration. Ammonia oxidizing bacteria (AOB) are not inhibited by low DO conditions. In addition, for the
denitrification process, insufficient carbon can inhibit the heterotrophic denitrifiers, which need carbon as electron
donor under low oxygen concentration. According to full-scale application, the BDP process can work at a Carbon
to Nitrogen (C/N) ratio as low as 0.17; however, a higher C/N ratio will lead to a higher nitrogen removal rate.
Configuration:
The BDP® process uses a bioreactor (basin) with a specific architecture enabling the simultaneous
nitrification/denitrification. The BDP® process can be directly installed after the pre-treatment process, as a main
stream biological wastewater treatment process, to substantially degrade chemical oxygen demand (COD) and
nitrogen of organic pollutants. Some tertiary treatment is added after the BDP process for water saving purposes
and/or reclamation.
Comparison to Established Technologies:
The BDP® process saves energy and carbon compared to conventional processes. Due to a highly efficient
aeration system and hydraulic reflux system, the BDP® process can achieve up to an 80% reduction in power
consumption. Based on the 7-8 years of full-scale applications and long-term data collection, the biomass
production is reduced by an average of 40% compared to other conventional processes. Moreover, the high
activated sludge concentration and improved simultaneous removal of nitrogen result in an average of a 50%
smaller footprint. Also, O&M costs are reduced by an average of 30% over a 2-8 year period of operations
monitoring.
Similar processes, such as DEMON®, SHARON®, ANAMMOX® and others, have been successfully demonstrated
for treating high strength side streams. Full-scale side stream systems have been operated in Europe for several
years. There are nine full-scale DEMON side-stream installations in the Netherlands, Austria, Germany,
Switzerland, Finland, and Hungary. The first U.S. side stream installation became operational in 2013 at the
Hampton Roads Sanitation District (HRSD) in Virginia. Several other projects in the United States are in the
design phase or are under construction including: the HRSD's York River WWTP in Seaford, VA; and the
Alexandria Renew Enterprise WWTP in Alexandria, VA.
These processes have not yet been installed in the main liquid stream process at full scale deammonification, due
to the difficulty in inhibiting nitrite oxidizing bacteria (NOB) growth in the full stream, the relatively lower
temperature and ammonia concentration in the full stream influent, and the need for selective retention of the
ANAMMOX bacteria. However, a full-scale full-plant deammonification demonstration has been installed at the
Strass WWTP in Austria, where a side stream deammonification process provides seed for bioaugmentation in
the full-plant testing. Full-plant deammonification has also been pilot tested at plants in Washington, DC and
Virginia. Additional information can be found on innovative side stream nitrification and denitrification treatment
technologies in the EPA's document on Emerging Technologies for Wastewater Treatment and In-Plant Wet
Weather Management (EPA-832-R-12-011, March 2013), Chapters, pages 3-16 to 3-21.
Key Words for Internet Search:
Ammonification, deammonification, Biological Double-efficiency Process (BDP), Simultaneous
Nitrification/Denitrification (SND).
Vendor Name:
BDP®- BDP EnviroTech Limited
Eric JG Li
Ste.1506 Tower B-1, Golden Tower,
No. 82, East 4th Ring Middle Rd.,
Beijing 100124, China
Telephone: +86 10 5208 8022
Email: liiianguo@bdp-tech.com
Web site: http://www. Bdp-tech.com
Installations:
Over 20 full-scale application installations in China are in operation.
The largest installation currently is over 13 MGD.
5 domestic sewage treatment installations have been operated since
2005 in:Anhui, mainland China
Tianjin, mainland China
Jiangsu, mainland China
1 domestic sewage treatment plant is under construction
Tianjin, mainland China .
Biological Double-efficiency Process (BDP)®
(continued)
Wastewater Treatment and In-Plant Wet Weather Management
AD-11
-------
August 2013
Emerging Technologies
There have been numerous full-scale industrial wastewater treatment installations since 2005, such as
petrochemical, oil refinery, textile and dyestuff, Pharmaceuticals and personal care products, industrial
wastewater with high concentrations of toxic chemicals, etc. The largest installation currently is over 53 MGD (i.e.
1 million pounds CODCrper day). BDP EnviroTech is working on the first pilot project in the US. The technology is
available commercially.
Influent
1000COD
Inflow 1Q
Influent
1OOOCOD
Inflow 1Q
1 : 1 550COD
Mixture circulation 2Q
Sludge
circulation 1Q
Effluent 50COD
Outflow 1Q
Mixture flow2Q
Conventional processes circulation system
20 : 1 9SCOD
V
Mixture circulation 2OQ
Outflow 1Q
Effluent 5OCOD
— ® BDP® Hydraulic Circulation System
EfWiroTech wwnv.bdp-tech. com
Figure 1: BDP* Hydraulic Circulation System Compared To Conventional Processes
Circulation System
Nonstop and Simple Aeration Operation
Nonstop Maintenance Anti-clociciinci Operation System aeration system is installed
with functionality of "self-cleaning".
Nonstop Aerator Replacement System: single aerator is changeable within 1O
minutes, while theWWTP's operation is not interrupted.
Nonstop Aerator Replacement System
Nonstop Maintenance Anti-clogging
O perati o n System
Figure 2: Nonstop and Simple Aeration Operation
Biological Double-efficiency Process (BDP)®
(continued)
Wastewater Treatment and In-Plant Wet Weather Management
AD-12
-------
August 2013
Emerging Technologies
Treatment capacity: 10,000m3/d (2,640,000gpd)
Process flow before upgrading: coarse grid + pump station + fine grid + grit chamber +
[ A/O + BAF tank + Second sediment tank ] + UV disinfection
Process flow after upgrading: coarse grid + pump station + fine grid + grit chamber + [ BDP® basin ]
+ UV disinfection
Technical Data :
Quality
Effluent before Effluent after
Index Influent ( mg/L ) upgrading upgrading
(mg/L) (mg/L)
CODcr 250 - 500 100 37
BODS 100 - 200 20 < "
SS 100 - 200 30 < 10
EnviroTech
www.bdp-tech.com
Figure 3: Influent/Effluent Data After Upgrade To The Tianjin WWTP
BDP® Basin
— ^ —'
BDP
E n v i r oTec h
www.bdp-tech.com
Figure 4: After Upgrading Original A/O Basin by BDP Technology, BAF Tank and Second
Sediment Tank are Eliminated and Footprint is Cut in Half
Biological Double-efficiency Process (BDP)®
(continued)
Wastewater Treatment and In-Plant Wet Weather Management
AD-13
-------
August 2013
Data Sources:
Emerging Technologies
Housing and Urban-Rural Development Bureau of Jiangsu Province, Technical Guidebook of Upgrading
Construction of Wastewater Treatment Plant in Taihu Lake Basin, Jiangsu Province, 2010.
Science and Technology Department, Ministry of Housing and Urban-Rural Development of the People's Republic
of China, Technical Certification Report, 2010.
Hehai University, Research Report of Upgrading Construction of WWTP in the Taihu Lake Basin, Jiangsu
Province, 2008
Pan, J., et al,. "Study and Application of BDP Process for Cyanic Wastewater Treatment," China Water &
Wastewater, Vol. 34(11), 2008.
Li, J., et al,. "Application of BDP Process in the Field of Petrochemical Wastewater Treatment," Water-Industry
Market, Vol.5, 2012.
Zhang, P., et al., "Simultaneous Nitrification and De-nitrification in Activated Sludge System Under Low Oxygen
Concentration," Frontiers of Environmental Science and Engineering in China, Vol. 1(1): 49-52, 2007.
Liu, Y., et al., "Study of Operational Conditions of Simultaneous Nitrification and De-nitrification in a Carrousel
Oxidation Ditch for Domestic Wastewater Treatment," Bioresource Technology, Vol. 101: 901-906, 2010.
Treatment
prepared 2013
Technology Summary
Wastewater Treatment and In-Plant Wet Weather Management
AD-14
-------
August 2013
Emerging Technologies
Alternative Disinfection [Peracetic Acid (PAA) and BCDMH]
Objective:
Alternatives to chlorine disinfection using disinfection
products such as peracetic acid (PAA, also known
as peroxyacetic acid [CH3CO3H]), or
Bromo Chloro Dimethylhydantoin (1-Bromo-3-Chloro-5,5) [BCDMH]).
State of Development:
Emerging.
Description:
Alternative disinfectants are being applied to wet-weather flows because of their ability to act as high-rate
disinfectants. PAA is a stronger oxidant than hypochlorite or chlorine dioxide, but not as strong as ozone. In
parts of Europe and Canada, chlorine is not used because of the potential to form disinfection byproducts (DBPs).
PAA is a strong oxidizing agent that can be used as a routine wastewater disinfectant. PAA does not affect
effluent toxicity, so it does not need to be removed as with chlorine. Recently approved by EPA specifically as a
wastewater disinfectant (Proxitane WW-12®), PAA is a clear, colorless liquid available at a concentration of 12 to
15 percent. With stabilizers to prevent degradation in storage it exhibits less than 1 percent decrease in activity
per year. At the 12 percent concentration, its freezing point is approximately-40 °C. Although it is explosive at
higher concentrations, at 15 percent or less, PAA does not explode. The solution is acidic (pH 2) and requires
care in handling, transport, and storage. PAA has been used successfully in combination with UV disinfection,
allowing reductions in lamp intensity and less frequent lamp cleaning. It is available in totes or in bulk, should
be stored near the point of application, and should be well mixed where it is introduced. The dosage used for
disinfecting secondary effluent depends on the target organisms, the water quality, and the level of inactivation
required. For example, a dosage of 5 mg/L 15 percent PAA, with contact time of 20 minutes, can reduce fecal
and total coliform by 4 to 5 logs in secondary effluent (Morris 1993). Dosage of 1-2 mg/L PAA is typical for
secondary effluents. Note, however, that PAA is less effective for inactivation of spores, viruses, and protozoa
including Giardia and Cryptosporidium (Koivunen et al. 2005; Liberti and Notarnicola 1999).
BCDMH is a chemical disinfectant used to treat drinking water. It is a crystalline substance, insoluble in water,
but soluble in acetone. It reacts slowly with water, releasing hypochlorous acid and hypobromous acid.
EBARA has devised a system to liquefy the BCDMH powder in a mixer with an injection device. The solution
is injected directly into the wastewater, and it relies on the turbulence of the process to mix into the
disinfection process.
Comparison to Established Technologies:
Compared to disinfection with chlorine compounds, PAA does not form harmful by-products after reacting with
wastewater when using dosages typical for secondary effluent. For example, during the trial at St. Augustine, FL,
(Keough and Tran 2011), an average PAA dose of 1.5 mg/L provided similar fecal coliform reduction as a
7 mg/L chlorine dose (both meeting the 200 cfu/00 mL limit), but the chlorine resulted in 170 ug/L total THM
compared to 0.6 ug/L TTHM for PAA. With tertiary treatment, PAA can meet effluent limits of less than 10 cfu/mL
but achieving very low (less than 2 cfu/100 mL) fecal coliform limits required high PAA doses (Leong et al. 2008).
However, a residual of acetic acid could be present and might exert an oxygen demand or provide substrate
for bacterial regrowth. Dosages and contact times are no more than required for disinfection with chlorine, so
existing contact tanks should be adequate for conversion to PAA.
BCDMH has a small footprint and is easier to store than chlorine disinfection products. The feed stock is
BCDMH powder, which is liquefied as needed by feeding through a dissolution mixer with clean water to form
a solution that is injected into the wastewater. The BCDMH powder is reportedly highly stable, with a shelf life
of longer than one year, making it potentially attractive for use in CSO applications that are characterized by
intermittent operation. BCDMH is an effective disinfectant that can achieve bacterial reductions comparable
to sodium hypochlorite, but it acts in a shorter amount of contact time (typically 3 minutes compared to 5 minutes
for sodium hypochlorite), thereby reducing the size of the contact chamber, which can result in capital cost
savings. Similar to sodium hypochlorite, BCDMH also produces disinfection byproducts (DBPs) and disinfection
residuals, potentially requiring the use of a reducing agent.
Available Cost Information:
Approximate Capital Cost: Equipment required is similar to that used for hypochlorite systems.
Approximate O&M Costs: The cost of PAA is approximately $1.00/lb.
Wastewater Treatment and In-Plant Wet Weather Management
AD-15
-------
August 2013
Emerging Technologies
Alternative Disinfection [Peracetic Acid (PAA) and BCDMH] (Continued)
Vendor Name(s):
Peracetic Acid
FMC Corporation
Minh Iran
1735 Market St
Philadelphia, PA 19103
Telephone: 609-951-3180 or 267-357-1645
Email: Minh.Tran@fmc.com
Web site: http://www.microbialcontrol.fmc.com
Solvay Chemicals NA/PERAGreen Solutions
John Maziuk
Technical Development Manager
3333 Richmond Avenue
Houston, TX 77098
Telephone: 713-525-6815
Cell Phone: 832-527-3211
Email: John.maziuk@solvay.com
Web site: www.solvaychemicals.us
BCDMH
EBARA Engineering Service Corporation
Shinagawa, NSS-11 Building
2-13-34 Konan, Minato-Ku, Tokyo, Japan
Telephone: 81-3-5461-6111 (switchboard)
Web site: http://www.ebara.co.jp/en/
Installation(s):
Peracetic Acid
Many applications are in Europe, including:
Milan/Taranto, Italy
Kuopio, Finland
Canadian applications:
Niagara Falls, Ontario
Chateauguay, Quebec
La Prairie, Quebec
U.S. Pilots:
Hannibal, MO
Steubenville, OH
Jefferson City, MO
St Augustine, FL
Largo, FL
BCDMH
Columbus, GA
Akron, OH
Key Words for Internet Search:
Alternative disinfectant, CSO disinfection, Peracetic Acid, PAA, peroxyacetic acid, BCDMH, Bromo Chloro
Dimethylhydantoin (1-Bromo-3-Chloro-5,5) [BCDMH]).
Data Sources:
Brian, K., and Tran, M., "Old City, New Ideas: Peracetic Acid in Wastewater Disinfection at St.Augustine,"
Florida Water Resources Journal, April, 2011.
Leong, et al., "Disinfection of Wastewater Effluent: Comparison of Alternative Technologies," Water
Environment Research Foundation (WERF) Report 04-HHE-4, 2008.
Rossi, S., et al., "Peracetic Acid Disinfection: A Feasible Alternative to Wastewater Chlorination," Water
Environment Research Foundation, Vol. 79, No. 4, pp. 341-350, 2007.
Moffa, P.E., et al., "Alternative Disinfection Technology Demonstrates Advantages for Wet Weather
Applications," Water Environment and Technology, January 2007.
Combined Sewer Overflow Technology Fact Sheet Alternative Disinfection Methods web site:
www.epa.gov/owmitnet/mtb/altdis.pdf.
Gehr, R., et al., "Disinfection Efficiency of Peracetic Acid, UV and Ozone after Enhanced Primary Treatment
of Municipal Wastewater," Water Research, Vol. 37, No. 19, pp. 4573-4586, 2003.
Morris, R., "Reduction of Microbial Levels in Sewage Effluents Using Chlorine and Peracetic Acid
Disinfectants," Water Science and Technology, Vol. 27, 1993.
Koivunen, J., and Heinonen-Tanski, H., "Inactivation of Enteric Microorganisms with Chemical Disinfectants,
UV Irradiation and Combined Chemical/UV Treatments," Water Research, Vol. 39, No. 8, pp.1519-1526, 2005.
Wastewater Treatment and In-Plant Wet Weather Management
AD-16
-------
August 2013
Emerging Technologies
Alternative Disinfection [Peracetic Acid (PAA) and BCDMH] (continued)
WERF, Wet Weather Demonstration Project in Columbus, Georgia, 98-WWR1P.
Kitis, M., "Disinfection of Wastewater with Peracetic Acid: A Review," Environment International, Vol. 30,
pp. 47-55, 2004.
Liberti, L, and Notarnicola, M., "Advanced Treatment and Disinfection for Municipal Wastewater Reuse in
Agriculture," Water Science and Technology, Vol. 40, No. 4-5, pp. 235-245, 1999.
Meakim, J.T., et al., "Peroxyacetic Acid Restores Design Capacity for Fecal Coliform Compliance in an
Underperforming UV Disinfection Wastewater System with No Capital Upgrade," Proceedings WEF Specialty
Conference on Disinfection, 2009.
Wastewater Treatment and In-Plant Wet Weather Management
AD-17
------- |