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|標題:||Continuous dechlorination of tetrachloroethene in an upflow anaerobic sludge blanket reactor||作者:||Hwu, C.S.
|關鍵字:||anaerobic granular sludge;dechlorination;tetrachloroethene;UASB;reactor;granular sludge;waste-water;biodegradation||Project:||Biotechnology Letters||期刊/報告no：:||Biotechnology Letters, Volume 30, Issue 9, Page(s) 1589-1593.||摘要:||
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 mu mol/d. A higher ethene production rate, 0.9 +/- 0.2 mu mol/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.
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