Treatment of chlorinated solvents in a bioreactor employing methane-oxidizing bacteria. Final report
Researchers have developed and tested a treatment process utilizing methane-oxidizing bacteria in a biological reactor. Trichloroethylene (TCE) and dichloroethylene (DCE), and mixtures of these compounds, such as often found in contaminated ground water or waste waters, can be efficiently degraded in this bioreactor. As methane is the sole source of carbon that can be utilized by these aerobic bacteria, the reactor was designed to provide efficient gas transfer of methane, as well as oxygen, to the biomass. The control and monitoring of gas input allowed determination of the effect of the concentrations and ratios of these gases on methanotrophic growth and biodegradation of the chlorinated aliphatics. Batch RBC experiments showed that the methanotrophic bacterial consortium could form a viable biofilm on a number of surface materials. Methane, TCE, and DCE biodegradation data from both batch and continuous RBC experiments indicated that completely mixed flow conditions and first order kinetics could be assumed for scale up predictions. The results showed that overall microbial activity was controlled by the methane concentration and the relative amount of oxygen made available.
- Research Organization:
- ABB Environmental Services, Inc., Wakefield, MA (United States). Bioremediation Systems Div.
- OSTI ID:
- 6097148
- Report Number(s):
- PB-92-113984/XAB; CNN: NSF-ISI87-03753
- Resource Relation:
- Other Information: Sponsored by National Science Foundation, Washington, DC
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHLORINATED ALIPHATIC HYDROCARBONS
BIODEGRADATION
GROUND WATER
DECONTAMINATION
METHANOTROPHIC BACTERIA
GROWTH
WASTE WATER
BATCH CULTURE
BIOREACTORS
CONTINUOUS CULTURE
METHANE
ORGANIC SOLVENTS
WATER POLLUTION CONTROL
ALKANES
BACTERIA
CHEMICAL REACTIONS
CLEANING
CONTROL
DECOMPOSITION
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROCARBONS
HYDROGEN COMPOUNDS
LIQUID WASTES
MICROORGANISMS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXYGEN COMPOUNDS
POLLUTION CONTROL
SOLVENTS
WASTES
WATER
560300* - Chemicals Metabolism & Toxicology