Microbial treatment of high-strength perchlorate wastewater

Seong Jin Nor, Sang Hyon Lee, Kyung Suk Cho, Daniel K. Cha, Kang In Lee, Hee Wook Ryu

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

To treat wastewater containing high concentrations of perchlorate, a perchlorate reducing-bacterial consortium was obtained by enrichment culture grown on high-strength perchlorate (1200mgL-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 (35-90mgL-1h-1) and stable removal efficiency over 200-day operations. The maximum specific perchlorate reduction rate (qmax), half saturation constant (Ks), and optimal pH range were 0.67mg-perchlorate mg-dry cell weight-1h-1, 193.8mg-perchlorateL-1, and pH 7-9, respectively. The perchlorate reduction yield was 0.48mol-perchloratemol-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%), Ideonella sp. (28%), and Dechloromonas sp. (19%).

Original languageEnglish
Pages (from-to)835-841
Number of pages7
JournalBioresource Technology
Volume102
Issue number2
DOIs
StatePublished - Jan 2011

Keywords

  • Cld Gene
  • High-strength
  • Perchlorate
  • Perchlorate reducing bacteria
  • Sequence-batch reactor

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