Bioremediation of Chlorinated Solvents
Training
Upcoming Bioremediation of Chlorinated Solvents Courses and Conferences and Archived Online Events
CLU-IN's Upcoming Courses and Conferences area features events related to innovative treatment and site characterization technologies, while the CLU-IN Studio contains live and archived videos, internet seminars, and conference webcasts.
Suggest a New Training Course or Conference
Biodegradation of DNAPL through Bioaugmentation
U.S. Navy, Naval Facilities Engineering Command, Environmental Restoration Technology Transfer, Multimedia Training Tools website, 20 pp, 2005.
In bioaugmentation, non-native microbial cultures that have demonstrated the ability to dechlorinate chlorinated organics completely down to ethene are injected into ground water near the DNAPL/water interface. Dechlorination is then achieved by supplying the added microorganisms with appropriate electron donor(s) and nutrients. The dechlorination process can occur via several metabolic pathways, but dehalorespiration is the primary pathway currently exploited for bioaugmentation. This Web Tool summarizes the concepts behind the use of bioaugmentation for DNAPL treatment and provides an overview of on-going Navy efforts in technology development.
DCE Stall Tool
U.S. Navy, Naval Facilities Engineering Command, Environmental Restoration Technology Transfer, Multimedia Training Tools website.
The reductive dechlorination of perchloroethene (PCE) and trichloroethene (TCE) yields dichloroethene (DCE), vinyl chloride (VC), and ethene. When the reductive dechlorination process is incomplete, the levels of DCE and VC in ground water can build up over time. This process is referred to as DCE stall, and it can limit the ability to meet cleanup goals and obtain site closure. This training tool discusses the suspected causes of DCE stall, along with potential solutions for this problem. DCE stall is typically caused by insufficient electron donor to achieve strongly reducing conditions. Under less reducing conditions, the DCE concentrations in ground water may accumulate without the apparent accumulation of VC, ethene, or ethane. At these sites, biological activity may be hindered by lack of sufficient electron donor or affected by pH, the presence of biotoxins, micronutrient limitations, and other factors. It also is possible that the expected products of VC and ethene are not formed because microbial oxidation or abiotic pathways are dominant (e.g., DCE transformation directly to carbon dioxide). All of these factors should be carefully considered before exploring a biostimulation or bioaugmentation approach at a given site.
Innovative Treatment Technologies Course
CERCLA Education Center (CEC).
3-Day Course or 1-Day short course. The in-depth, three-day course offered by the CERCLA Education Center (CEC) provides information about technical, financial, and practical factors to be considered when determining the appropriateness of innovative treatment technologies for application in various cleanup projects. The one-day course provides a comprehensive overview of a number of innovative technologies, including bioremediation (various types), soil vapor extraction enhancements, thermal desorption, soil washing, air sparging, passive treatment walls, base-catalyzed dechlorination, surfactant flushing, and thermally enhanced extraction. Visit the TRAINING EXCHANGE web site for schedules and locations.
Low-Cost Remediation Strategies for Contaminated Soil and Ground Water
Technologies to be covered in this course include natural attenuation, enhanced bioremediation, air sparging, and phytoremediation for remediation of contaminated ground water; bioventing for remediation of contaminated soil; and bioslurping for removal of light nonaqueous-phase liquid. Dates and locations are subject to change. For details, please visit the web site and click on Education. Or call (800) 551-7379 or (614) 898-7791, or FAX (614) 898-7786.
