Comparison of alternative electron donors to sustain PCE anaerobic reductive dechlorination
- Cornell Univ., Ithaca, NY (United States)
- DHHS/PHS/Indian Health Service, Oneida, NY (United States). New York District Office
Anaerobic reductive dechlorination of tetrachloroethane (PCE) to ethene (ETH) appears to use hydrogen as the direct electron donor. Hydrogen addition may be problematic for large-scale treatment systems. Adding an electron donor which is fermented to hydrogen may be more practical. Competition for substrate or reduction equivalents by methanogens should be minimized. Studies were performed with methanol, ethanol, lactic acid, and butyric acid to determine their suitability for maintaining reductive dechlorination by an anaerobic mixed culture. Electron donors were examined in semicontinuously operated serum bottles with a nominal PCE concentration of 110 {micro}mol/L and a 2:1 ratio of electron donor to PCE on an equivalent basis. The patterns of electron donor degradation, hydrogen formation, dechlorination, and methanogenesis were determined for each substrate. Dechlorination was sustained better with butyric acid, lactic acid, or ethanol than with methanol.
- OSTI ID:
- 474258
- Report Number(s):
- CONF-950483-; ISBN 1-57477-005-5; TRN: IM9723%%148
- Resource Relation:
- Conference: 3. international in situ and on-site bioreclamation symposium, San Diego, CA (United States), 24-27 Apr 1995; Other Information: PBD: 1995; Related Information: Is Part Of Bioremediation of chlorinated solvents; Hinchee, R.E.; Leeson, A. [eds.] [Battelle Memorial Inst., Columbus, OH (United States)]; Semprini, L. [ed.] [Oregon State Univ., Corvallis, OR (United States)]; PB: 348 p.; Bioremediation, Volume 3(4)
- Country of Publication:
- United States
- Language:
- English
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