Complete reductive dechlorination of tetrachloroethene to ethene by anaerobic microbial enrichment culture developed from sediment |
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| Authors: | Byung-Hyuk Kim Kyung-Hwa Baek Dae-Hyun Cho Youlboong Sung Sung-Cheol Koh Chi-Yong Ahn Hee-Mock Oh Hee-Sik Kim |
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| Institution: | (1) Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 305-333, Republic of Korea;(2) Environ & Energy Research Center, Research Institute of Science and Technology (RIST), Gwangyang-Si, Chollanam-Do, 545-090, Republic of Korea;(3) Department of Environmental Engineering, Korea Maritime University, Busan, 606-791, Republic of Korea; |
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| Abstract: | A mixed, anaerobic microbial enrichment culture, AMEC-4P, was developed that uses lactate as the electron donor for the reductive
dechlorination of tetrachloroethene (PCE) to ethene. AMEC-4P consistently and completely converted 2 mM PCE to cis-1,2-dichloroethene (cis-DCE) within 13 days, and the intermediate, cis-DCE, was then completely dechlorinated to ethene after 130 days. Dechlorination rates for PCE to cis-DCE, cis-DCE to VC, and VC to ethene were 243, 27, and 41 μmol/l/day, respectively. Geobacter lovleyi and a Dehalococcoides sp. were identified from their 16S rRNA sequences to be the dominant phylotypes in AMEC-4P. |
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