Bioremediation of Chlorinated Solvents

Overview Guidance Application Training Additional Resources

Additional Resources

AFCEE Source Zone Initiative
Air Force Center for Environmental Excellence (AFCEE), 234 pp +appendix (273 pp), 2007

Appendices (3.9 MB/253pp/PDF)

Key elements include a description of governing processes, illustrative laboratory studies, predictive models, and demonstrative field data, including a review of source control measures taken for TCE at Air Force Plant 4, near the former Carswell Air Force Base, TX. Results from this work indicate that transverse diffusion can drive contaminants into low permeability zones. Initially, this has the effect of attenuating contaminants in transmissive layers. After the DNAPL has been depleted, back diffusion from low permeability zones can sustain contaminant concentrations in transmissive layers in source zones and plumes.

Air Force Center for Engineering and the Environment Source Zone Treatment Web Site

The AFCEE Source Zone Treatment technology roadmap is intended to assist Air Force environmental managers in identifying and applying more effective methods for remediating and managing sites with contamination source zones. The web site offers a background on source zone remediation, the relevant issues, 'how-to' tools and knowledge, resources, links, and timely state-of-the-art technology reviews.

Bioremediation Discussion Group and Mailing List

The BioGroup is a global forum for discussing the technical aspects of bioremediation science and engineering. The Internet mailing list is hosted and moderated by GZA GeoEnvironmental, Inc.

Bioremediation of Chlorinated Solvents Consortium

The Consortium is one of seven Action Teams of the Remediation Technologies Development Forum (RTDF). It was established in May 1993, when representatives from various companies, universities, EPA, DoD, and DOE met to discuss their mutual interest in developing in situ bioremediation technologies to degrade chlorinated solvents in soils and ground water. The historical information concerning the consortium is available through the RTDF home page.

In 2004, the RTDF - Bioremediation Consortium initiated Phase III of its research activities when it joined forces with a multinational team to launch the In Situ Source Area Bioremediation project (SABRE). This project, which is being conducted in the United Kingdom, is scheduled to be completed in 2008 and has a budget of nearly $6 million, financed by industrial members and the DTI LINK Bioremediation program in the UK. The goal is to demonstrate the efficacy of accelerated anaerobic bioremediation as a treatment alternative for source areas contaminated with chlorinated solvent dense non-aqueous phase liquids (DNAPLs). The SABRE project team comprises: Archon Environmental; British Geological Survey (BGS); Celanese Acetate; Chevron; CL:AIRE; DuPont; ESI; GE; Geosyntec Consultants, Inc.; Golder Associates; Honeywell; ICI; Scientifics; SERDP; Shell; SiREM; Terra Systems, Inc; University of Edinburgh; and University of Sheffield. The Environment Agency (EA) of England and Wales and US EPA are also included. In addition, the University of Birmingham and BGS are conducting a complimentary research project (Streamtube) in the SABRE test cell. The project has completed initial characterization of DNAPL source zones, a laboratory microcosm study, installation of the test cell, and baseline data collection. Column studies are well advanced, and modelling is occurring throughout the project. Biostimulation and bioaugmentation of the test cell occurred in the Spring of 2007.

Center for Microbial Ecology at Michigan State University: Bioremediation Research Initiative

The Effect of Concentrated Electron Donors on the Solubility of Trichloroethene
E. Hood, D. Major, and G. Driedger.
Ground Water Monitoring & Remediation , Vol 27 No 4, p 93-98, 2007

Although recent vendor claims suggest that the addition of highly concentrated electron donor solutions to increase the aqueous solubility of TCE during enhanced in situ bioremediation is a significant mechanism of contaminant mass removal, the results of experimental measurements of the solubility of TCE in aqueous solution with 8 typical electron donors suggest that due to the small changes in TCE solubility in comparison to the high electron donor concentrations employed, it is difficult to envision circumstances justifying the use of a high electron donor concentration to enhance TCE solubility as part of a bioremediation strategy, though the use of more concentrated (e.g., 50 to 95%) ethanol solutions would be appropriate for cosolvent flooding.

In Situ Bioremediation of Chlorinated Ethene DNAPL Source Zones: A Resource Guide
Interstate Technology & Regulatory Council (ITRC) Bioremediation of DNAPLs Team, 46 pp, 2007

This resource guide provides a compilation of relevant scientific and technical literature on the bioremediation of chlorinated ethene DNAPLs designed to help regulators, technology practitioners, site owners, and others develop a consistent approach to the basic principles, terminology, and technical features of bioremediation. The guide attempts to address the most critical aspects of the technology, but it is not intended to be an exhaustive treatise on the subject either in breadth or depth.

Technology Innovation News Survey
2004

The Technology Innovation News Survey contains market/commercialization information; reports on demonstrations, feasibility studies and research; and other news relevant to the hazardous waste community interested in technology development. This report is updated every two weeks.

Treatment Technologies for Site Cleanup: Annual Status Report (ASR), Twelfth Edition
EPA 542-R-07-012, 2007

The Twelfth Edition of this report, published by the EPA Office of Superfund Remediation and Technology Innovation (OSRTI) in September 2007, documents treatment technology applications at more than 1,900 soil and groundwater cleanup projects at National Priorities List (NPL) sites. The status of more than 1,200 projects included in the ASR Eleventh Edition is updated, and information about 192 new projects derived from Records of Decision (ROD) signed from 2002 through 2005 is added. The report also includes a special section about on-site containment remedies. The ASR is based on the analysis of nearly 3,000 RODs signed since 1982 at 1,536 NPL sites. The online version includes new downloadable spreadsheets with the data for several of the key tables and figures in the report. Specific information about each technology application included in the ASR Twelfth Edition is available in the ASR Remediation Database.

University Consortium for Field Focused Groundwater Contamination Research

The Consortium Program was the first major research effort focused on the problems of chlorinated solvents in groundwater. The Consortium Program maintains its leading edge and unique position through its research emphasis on new concepts, site investigative and remedial technologies in intensive field studies supported by laboratory experiments and mathematical models.

The University of Minnesota Biocatalysis/Biodegradation Database

This web site provides graphic and text-based information concerning microbial biocatalytic reactions and biodegradation pathways for, primarily, xenobiotic chemical compounds. Instead of focusing on an organism, the starting point of this database is a chemical, such as trichloroethylene or chlorobenzene.

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Last updated on Monday, July 28, 2008