TY - JOUR
T1 - Community structure and function in a H2-based membrane biofilm reactor capable of bioreduction of selenate and chromate
AU - Chung, Jinwook
AU - Ryu, Hodon
AU - Abbaszadegan, Morteza
AU - Rittmann, Bruce
N1 - Funding Information:
H. Ryu . M. Abbaszadegan National Science Foundation Water Quality Center, Department of Civil and Environmental Engineering, Arizona State University, P.O. Box 875306, Tempe, AZ 85287-5306, USA
PY - 2006/10
Y1 - 2006/10
N2 - 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.
AB - 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.
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U2 - 10.1007/s00253-006-0439-x
DO - 10.1007/s00253-006-0439-x
M3 - Article
C2 - 16673108
AN - SCOPUS:33749845311
SN - 0175-7598
VL - 72
SP - 1330
EP - 1339
JO - Applied Microbiology and Biotechnology
JF - Applied Microbiology and Biotechnology
IS - 6
ER -