利用氫氣自營性薄膜生物反應槽進行氯酚脫氯之研究
Date Issued
2004-07-31
Date
2004-07-31
Author(s)
曾四恭
DOI
922211E002029
Abstract
The reductive dechlorination is the main metabolic pathway for chlorophenols
under anaerobic conditions. The addition of external organics or hydrogen are the
most usage to enhance dechlorination. In which, the hydrogen has no secondary
pollution, and thus suit for the remediation of polluted groundwater. A
gas-permeable silicone membrane bioreactor was used to cultivate the biofilm under
hydrogenotrophic condition for reductive dechlorination of 2-chlorophenol (2-CP).
After acclimating for about 4 months, the bioreactor showed a high dechlorinating
performance. H2 was used as electron donor for dechlorinating 2-CP, and produced
the dechlorinating intermediate, phenol. Both nitrate and sulfate inhibited the 2-CP
dechlorination, but the inhibition levels were different. Nitrate completely inhibited
the dechlorination at once, while sulfate took longer time to reach completely
inhibition, only after the bacteria having adapted to the sulfate-reducing condition.
Both inhibitions were accomplished by taking the place of 2-CP as electron acceptors.Results of this study demonstrated that nitrate competed with 2-CP as the electron
acceptor, while sulfate retarded the activity of hydrogen-dechlorinating bacteria and
thus inhibited the 2-CP dechlorination.
Subjects
hydrogenotrophic
chlorophenol
phenol
dechlorination
biofilm
bioreactor
Publisher
臺北市：國立臺灣大學環境工程學研究所
Type
report
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