Community structure and function in a H2-based membrane biofilm reactor capable of bioreduction of selenate and chromate

Jinwook Chung, Hodon Ryu, Morteza Abbaszadegan, Bruce Rittmann

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Two different H2-based, denitrifying membrane-biofilm reactors (MBfRs) initially reduced Se(VI) or Cr(VI) stably to Se0 or Cr(III). When the oxidized contaminants in the influent were switched, each new oxidized contaminant was reduced immediately, and its reduction soon was approximately the same or greater than it had been in its original MBfR. The precipitation of reduced selenium and chromium in the biofilm was verified by scanning electron microscopy and energy dispersive X-ray analysis. These results on selenate and chromate reduction are consistent with the interpretation that the H 2-based biofilm community had a high level of functional diversity. The communities' structures were assessed by cloning analysis. Dechloromonas spp., a known perchlorate-reducing bacteria, dominated the clones from both reactors during selenate and chromate reductions, which suggests that it may have functional diversity capable of reducing selenate and chromate as secondary and dissimilatory acceptors.

Original languageEnglish (US)
Pages (from-to)1330-1339
Number of pages10
JournalApplied Microbiology and Biotechnology
Volume72
Issue number6
DOIs
StatePublished - Oct 1 2006

ASJC Scopus subject areas

  • Biotechnology
  • Applied Microbiology and Biotechnology

Fingerprint Dive into the research topics of 'Community structure and function in a H<sub>2</sub>-based membrane biofilm reactor capable of bioreduction of selenate and chromate'. Together they form a unique fingerprint.

Cite this