United States
Environmental Protection
Agency
EPA/540/M5-89/005
August 1989
&EPA
SUPERFUND INNOVATIVE
TECHNOLOGY EVALUATION
Demonstration Bulletin
Solidification/Stabilization Process
Soliditech, Inc.
TECHNOLOGY DESCRIPTION: The Soliditech
solidification/stabilization technology mixes hazardous
waste materials in soils or sludges with pozzolanic
material (cement, fly ash, or kiln dust), a proprietary
additive called Urrichem, other proprietary additives,
and water. The process is designed to aid in the
physical and chemical immobilization of the hazardous
waste constituents by binding them in a leach-
resistant matrix.
After the contaminated waste material is collected and
screened to remove oversized material, it is
introduced to a batch mixer. Each waste material is
mixed with proprietary chemical reagents and
additives, water, and cement. Figure 1 is a schematic
of the process.
Figure 1. Soliditech process schematic.
Once thoroughly mixed, the treated waste is
discharged from the mixer and allowed to harden. The
treated waste is a solidified mass with significant
unconfined compressive strength, high stability, and a
rigid texture similar to concrete. Batch mixers of
various capacities are available to treat different
volumes of waste.
WASTE APPLICABILITY: This technology is intended
for the treatment of soils and sludges contaminated
with organic compounds, metals, inorganic
compounds, and oil and grease.
DEMONSTRATION RESULTS: The Soliditech
process was demonstrated December 5-8, 1988, at
the Imperial Oil Company/Champion Chemicals
Superfund site in Morganville, New Jersey. In the
past, this location contained both chemical processing
and oil reclamation facilities.
Physical test results of the solidified waste samples
were very good. Unconfined compressive strengths
ranged from 390 to 860 psi. Wet/dry and freeze/thaw
durability test results were excellent, showing no or
very little weight loss after 12 cycles. Permeability of
the treated waste was very low.
TCLP extraction tests indicated reduced leaching of all
metals except those contributed by the cement or
other additives (aluminum, calcium, chromium, and
sodium). No volatile organic compounds were
detected in the TCLP leachates of the treated wastes.
Several semivolatile organic compounds (phenols)
were detected in the treated wastes that were either
not present or present at lower concentrations in the
untreated waste. The presence of these compounds
has not been explained but may be due to a chemical
reaction. Oil and grease was found to leach from the
treated waste at the same or at slightly higher
concentrations than from the untreated waste. Raw
-------
United States
Environmental Protection
Agency
EPA/540/M5-89/005
August 1989
EPA
SUPERFUND INNOVATIVE
TECHNOLOGY EVALUATION
Demonstration Bulletin
Solidification/Stabilization Process
Soliditech, Inc.
TECHNOLOGY DESCRIPTION: The Soliditech
solidification/stabilization technology mixes hazardous
waste materials in soils or sludges with pozzolanic
material (cement, fly ash, or kiln dust), a proprietary
additive called Urrichem, other proprietary additives,
and water. The process is designed to aid in the
physical and chemical immobilization of the hazardous
waste constituents by binding them in a leach-
resistant matrix.
After the contaminated waste material is collected and
screened to remove oversized material, it is
introduced to a batch mixer. Each waste material is
mixed with proprietary chemical reagents and
additives, water, and cement. Figure 1 is a schematic
of the process.
Figure 1. Soliditech process schematic.
Once thoroughly mixed, the treated waste is
discharged from the mixer and allowed to harden. The
treated waste is a solidified mass with significant
unconfined compressive strength, high stability, and a
rigid texture similar to concrete. Batch mixers of
various capacities are available to treat different
volumes of waste.
WASTE APPLICABILITY: This technology is intended
for the treatment of soils and sludges contaminated
with organic compounds, metals, inorganic
compounds, and oil and grease.
DEMONSTRATION RESULTS: The Soliditech
process was demonstrated December 5-8, 1988, at
the Imperial Oil Company/Champion Chemicals
Superfund site in Morganville, New Jersey. In the
past, this location contained both chemical processing
and oil reclamation facilities.
Physical test results of the solidified waste samples
were very good. Unconfined compressive strengths
ranged from 390 to 860 psi. Wet/dry and freeze/thaw
durability test results were excellent, showing no or
very little weight loss after 12 cycles. Permeability of
the treated waste was very low.
TCLP extraction tests indicated reduced leaching of all
metals except those contributed by the cement or
other additives (aluminum, calcium, chromium, and
sodium). No volatile organic compounds were
detected in the TCLP leachates of the treated wastes.
Several semivolatile organic compounds (phenols)
were detected in the treated wastes that were either
not present or present at lower concentrations in the
untreated waste. The presence of these compounds
has not been explained but may be due to a chemical
reaction. Oil and grease was found to leach from the
treated waste at the same or at slightly higher
concentrations than from the untreated waste. Raw
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