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Degradation of Tetrachloroethylene (PCE) by a Dechlorinating Enrichment Culture Fixed in an Anaerobic Reactor  

Lee Tae Ho (부산대학교 환경기술산업개발연구소)
Publication Information
Journal of Soil and Groundwater Environment / v.9, no.3, 2004 , pp. 49-55 More about this Journal
Abstract
A soil enrichment LYF-1 culture from a contaminated site, which could reductively dechlorinate 900 $\mu$M (ca. 150 mg/L) of tetrachloroethylene (PCE) stoichimetrically into cis-1,2-dichloroethylene (cis-DCE), was established and characterized. The enrichment culture can use yeast extract, peptone, formate, acetate, lactate, pyruvate, citrate, succinate, glucose, sucrose, and ethanol as electron donors for dechlorination of PCE. Addition of NO$_2$$^{[-10]}$ and NO$_3$$^{[-10]}$ as alternative electron acceptors showed complete inhibition of PCE dechlorination, but S$_2$O$_3$$^{-2}$ , SO$_3$$^{-2}$ and SO$_4$$^{-2}$ had no significant effect on PCE dechlorination. The enrichment culture was attached to ceramic media in an anaerobic fixed-bed reactor. The fixed-bed reactor showed more than 99％ of PCE degradation in the range of PCE loading rate of 0.13-0.78 $\mu$moles/L/hr. The major end product of PCE dechlorination was cis-DCE.
Keywords
Tetrachloroethylene(PCE); Dechlorination; Soil enrichment culture; Anaerobic liked bed reactor;
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