Microbial treatment of high-strength perchlorate wastewater
- Authors
- Nor, Seong Jin; Lee, Sang Hyon; Cho, Kyung-Suk; Cha, Daniel K.; Lee, Kang In; Ryu, Hee Wook
- Issue Date
- Jan-2011
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Perchlorate; Perchlorate reducing bacteria; High-strength; Sequence-batch reactor; cld Gene
- Citation
- BIORESOURCE TECHNOLOGY, v.102, no.2, pp.835 - 841
- Journal Title
- BIORESOURCE TECHNOLOGY
- Volume
- 102
- Number
- 2
- Start Page
- 835
- End Page
- 841
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/5455
- DOI
- 10.1016/j.biortech.2010.08.127
- ISSN
- 0960-8524
- Abstract
- To treat wastewater containing high concentrations of perchlorate, a perchlorate reducing-bacterial consortium was obtained by enrichment culture grown on high-strength perchlorate (1200 mg L(-1)) feed medium, and was characterized in a sequence batch reactor (SBR) over a long-time operation. The consortium removed perchlorate in the SBR with high reduction rates (35-90 mg L(-1) h(-1)) and stable removal efficiency over 200-day operations. The maximum specific perchlorate reduction rate (q(max)), half saturation constant (K(s)), and optimal pH range were 0.67 mg-perchlorate mg-dry cell weight(-1) h(-1), 193.8 mg-perchlorate L(-1), and pH 7-9, respectively. The perchlorate reduction yield was 0.48 mol-perchlorate mol-acetate(-1). A clone library prepared using the amplicons of cld gene encoding chlorate dismutase showed that the dominant (per)chlorate reducing bacteria in the consortium were Dechlorosoma sp. (53%), Ideo-nella sp. (28%), and Dechloromonas sp. (19%). (C) 2010 Elsevier Ltd. All rights reserved.
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