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Strategies for Cost-Effective In-situ Mixing of Contaminants and Additives in Bioremediation
EPA Grant Number: R828772C002Subproject: this is subproject number 002 , established and managed by the Center Director under grant R828772
(EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).
Center: HSRC (2001) - Western Region Hazardous Substance Research Center for Developing In-Situ Processes for VOC Remediation in Groundwater and Soils
Center Director: Semprini, Lewis
Title: Strategies for Cost-Effective In-situ Mixing of Contaminants and Additives in Bioremediation
Investigators: Kitanidis, Peter K. , Criddle, Craig C.
Institution: Stanford University
EPA Project Officer: Lasat, Mitch
Project Period: September 1, 2001 through August 31, 2003
Project Amount: Refer to main center abstract for funding details.
RFA: Hazardous Substance Research Centers - HSRC (2001)
Research Category: Hazardous Waste/Remediation
Description:
Objective:To develop and evaluate cost-effective methods of chemical addition and mixing for in-situ remediation. Such methods will employ recirculation units, pairs of extraction-injection wells, sparging systems, biocurtains, and time- and space-sequenced operations. The research will evaluate specific methods of chemical delivery and mixing and compare them on the same basis in terms of effectiveness and cost. This study will produce a set of tools and guidelines for the design of effective in-situ delivery and mixing systems. The PIs will field test developed methodologies at their own sites and/or collaborate with other researchers who design field-scale in-situ remediation projects. Approach:
This study will synthesize available knowledge and previous experience about flow, transport, and biochemical reactions; and will utilize results from field-scale studies at sites such as Schoolcraft, Michigan. The overall approach consists of: (1) identification of key remediation problems, such as bioremediation of organic solvents or metals, (2) development of a suite of remediation strategies based on biogeochemical process understanding, (3) assessment of the feasibility and cost of innovative chemical delivery and mixing methods using mathematical modeling of geologic-media hydrodynamics, transport, and biogeochemical relations together with cost-based objective functions. Expected Results:
Effective and economical methods for chemical delivery and mixing are the key to successful field-scale application of remediation technologies. Belowground reactors deserve special attention because they are more complex, less well characterized, and more difficult to control and manipulate than engineered aboveground reactors. At the field scale, the effectiveness of the mixing schemes is as important as the effectiveness of the underlying remediation process itself. The proposed work will develop new methods for chemical delivery and mixing and will provide guidelines on the scope of existing and new methods. Most importantly, this study will advance the development of a scientific theory and methodology for the design of in-situ reactors. Supplemental Keywords:
In-situ bioremediation, groundwater, chemical delivery, mixing, biostimulation, cost-benefit, risk management. , Scientific Discipline, Waste, RFA, Remediation, Hazardous Waste, Biochemistry, Environmental Engineering, Environmental Chemistry, Hazardous, Bioremediation, heavy metals, biodegradation, biotransformation, geochemistry, extraction of metals, in-situ biotransformation, fate and transport modeling, field scale studies, chlorinated solvents, metal compounds, biostimulation, in-situ bioremediation, metal wastes, field studies, mathematical models, mathmatical modeling, hazardous waste treatment, organic solvents, sparging systems, in situ remediation, recirculation
Progress and Final Reports:
2002 Progress Report
2003 Progress Report
Main Center Abstract and Reports:
R828772 HSRC (2001) - Western Region Hazardous Substance Research Center for Developing In-Situ Processes for VOC Remediation in Groundwater and Soils
Subprojects under this Center:
(EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).
R828772C001 Developing and Optimizing Biotransformation Kinetics for the Bio- remediation of Trichloroethylene at NAPL Source Zone Concentrations
R828772C002 Strategies for Cost-Effective In-situ Mixing of Contaminants
and Additives in Bioremediation
R828772C003 Aerobic Cometabolism of Chlorinated Aliphatic Hydrocarbon Compounds with Butane-Grown Microorganisms
R828772C004 Chemical, Physical, and Biological Processes at the Surface of Palladium Catalysts Under Groundwater Treatment Conditions
R828772C005 Effects of Sorbent Microporosity on Multicomponent Fate
and Transport in Contaminated Groundwater Aquifers
R828772C006 Development of the Push-Pull Test to Monitor Bioaugmentation
with Dehalogenating Cultures
R828772C007 Development and Evaluation of Field Sensors for Monitoring
Bioaugmentation with Anaerobic Dehalogenating Cultures for In-Situ Treatment of
TCE
R828772C008 Training and Technology Transfer
R828772C009 Technical Outreach Services for Communities (TOSC) and Technical Assistance to Brownfields Communities (TAB) Programs
R828772C010 Aerobic Cometabolism of Chlorinated Ethenes by Microorganisms that Grow on Organic Acids and Alcohols
R828772C011 Development and Evaluation of Field Sensors for Monitoring Anaerobic Dehalogenation after Bioaugmentation for In Situ Treatment of PCE and TCE
R828772C012 Continuous-Flow Column Studies of Reductive Dehalogenation with Two Different Enriched Cultures: Kinetics, Inhibition, and Monitoring of Microbial Activity
R828772C013 Novel Methods for Laboratory Measurement of Transverse Dispersion in Porous Media
R828772C014 The Role of Micropore Structure in Contaminant Sorption and Desorption