Environmental Engineering Reference
In-Depth Information
•
Design and test mixing capacity of low-water-content bioreactor (~1/
5 scale) for the treatment of PCB-contaminated soils.
•
Perform economic analysis of bioreactor system and compare costs
to competing technologies based on site-specific information.
•
Optimize anaerobic-aerobic reactor treatment scheme, including ma-
terials handling; the addition of bulking agents, biocarriers, and nu-
trients; and disposal procedures.
•
Conduct surfactant performance tests using PCB-contaminated soils
to test the potential for surfactant sorption losses and PCB phase
distribution and PCB desorption rates.
•
Assist in scale-up of the bioreactor and implementation of pilot-scale
tests.
•
Assist in regulatory compliance with regard to PCBs and genetically
engineered microorganisms (GEMs) handling and disposal procedures.
•
Coordinate interaction among PCB thrust area PIs (J. Tiedje at MSU,
K. Pennel at Georgia Tech, and L. Hansen at WES) and incorporate
laboratory results into field-scale reactor design and operation.
•
Evaluate mixing performance and materials addition of full-scale
reactor during operation.
6.2.4
Field-Test Phase Objectives
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Evaluate the effects of vermiculite and Fe(II) on survival and activity
of GEMs in soil.
•
Evaluate survivability and PCB degradative activity of GEMs in con-
taminated soils.
•
Develop protocol for preparation and delivery of GEMs in pilot-scale
reactors.
•
Conduct laboratory-scale experiments to evaluate the effects of sur-
factant additions on PCB desorption and biodegradation under mix-
ing regimes similar to those utilized in the pilot-scale reactors.
•
Develop and evaluate mathematical models designed to simulate
PCB desorption and biodegradation in the presence and absence of
surfactants.
•
Validate the design and strategy for two-phase anaerobic-aerobic
bioremediation of PCB-contaminated soils using laboratory-scale soil
microcosms.
•
Evaluate the use of PCB-growing GEMs in combination with en-
hanced anaerobic dechlorination and surfactants for bioremediating
PCB-contaminated soils.
•
Design pilot-scale treatment systems, including slurry and
land-farming reactors, to test PCB remediation technologies.
•
Develop cost estimates for pilot-scale treatment systems and perform
economic analysis of full-scale implementation with comparisons to
conventional PCB treatment technologies.
