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Synergistic Utilization of Dichloroethylene as Sole Carbon Source by Bacterial Consortia Isolated from Contaminated Sites in Africa
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  • Synergistic Utilization of Dichloroethylene as Sole Carbon Source by Bacterial Consortia Isolated from Contaminated Sites in Africa
  • Synergistic Utilization of Dichloroethylene as Sole Carbon Source by Bacterial Consortia Isolated from Contaminated Sites in Africa
저자명
Olaniran. Ademola O.,Mfumo. Nokukhanya H.,Pillay. Dorsamy,Pillay. Balakrishna
간행물명
Biotechnology and bioprocess engineering
권/호정보
2006년|11권 3호|pp.205-210 (6 pages)
발행정보
한국생물공학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

The widespread use and distribution of chloroethylene organic compounds is of serious concern owing to their carcinogenicity and toxicity to humans and wildlife. In an effort to develop active bacterial consortia that could be useful for bioremediation of chloroethylene-contaminated sites in Africa, 16 combinations of 5 dichloroethylene (DCE)-utilizing bacteria, isolated from South Africa and Nigeria, were assessed for their ability to degrade cis- and trans- DCEs as the sole carbon source. Three combinations of these isolates were able to remove up to 72% of the compounds within 7 days. Specific growth rate constants of the bacterial consortia ranged between 0.465 and $0.716;d^{-1}$ while the degradation rate constants ranged between 0.184 and $0.205;d^{-1}$ with $86.36{sim}93.53;and;87.47{sim}97.12%$ of the stoichiometric-expected chloride released during growth of the bacterial consortia in cis- and trans-DCE, respectively. Succession studies of the individual isolates present in the consortium revealed that the biodegradation process was initially dominated by Achromobacter xylosoxidans and subsequently by Acinetobacter sp. and Bacillus sp., respectively. The results of this study suggest that consortia of bacteria are more efficient than monocultures in the aerobic biodegradation of DCEs, degrading the compounds to levels that are up to 60% below the maximum allowable limits in drinking water.