Continuous dechlorination of tetrachloroethene in an upflow anaerobic sludge blanket reactor

Biotechnology Letters
Ching-Shyung Hwu, Chih-Jen Lu

Abstract

Influences of hydraulic retention time (HRT) on dechlorination of tetrachloroethene (PCE) were investigated in an upflow anaerobic sludge blanket (UASB) reactor inoculated with anaerobic granular sludge non-pre-exposed to chlorinated compounds. PCE was introduced into the reactor at a loading rate of 3 mg/l d. PCE removal increased from 51+/-5% to 87+/-3% when HRT increased from 1 to 4 d, corresponding to an increase in the PCE biotransformation rate from 10.5+/-2.3 to 21.3+/-3.7 micromol/d. A higher ethene production rate, 0.9+/-0.2 micromol/d, was attained without accumulation of dichloroethenes at the HRT of 4 d. Dehalococcoides-like species were detected in sludge granules by fluorescence in situ hybridization, with signal strength in proportion to the extent of PCE dechlorination.

References

Jun 1, 1992·Applied and Environmental Microbiology·W P de BruinA J Zehnder
Apr 29, 2004·Environmental Science & Technology·Donna E FennellMax M Häggblom
Jan 27, 2005·Applied Microbiology and Biotechnology·Chunlong Zhang, George N Bennett

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Citations

Jan 17, 2012·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Debolina Basu, Shyam R Asolekar
Sep 16, 2017·Environmental Science & Technology·Anca G DelgadoRosa Krajmalnik-Brown

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