Title: Dynamic changes in microbial diversity of aerobic granules

Authors: Hai-Lou Xu, Shao Bing Johanan Aow, Jing Wei Samuel Chua, Yu Liu

Addresses: School of Chemical and Life Sciences, Singapore Polytechnic, 500 Dover Road, 139651 Singapore. ' School of Chemical and Life Sciences, Singapore Polytechnic, 500 Dover Road, 139651 Singapore. ' School of Chemical and Life Sciences, Singapore Polytechnic, 500 Dover Road, 139651 Singapore. ' School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore

Abstract: The bacterial diversity and their population changes were investigated in acetate-fed aerobic granules cultivated in two Sequencing Batch Reactors (SBRs), A and B. The top nine dominant bacteria were isolated, and their growths were tracked in another two SBRs (C and D) which were cultivating granules without selection pressures. The nine bacterial population in C and D were compared to the references obtained from A and B. The failure to cultivate granules in C and D was attributed to the nine isolates being outcompeted by poor settling fast growing bacteria and failing to reach a critical population size.

Keywords: aerobic granules; aerobic granulation; SBR; sequencing batch reactors; bacterial diversity; bacterial identification; wastewater treatment.

DOI: 10.1504/WRSTSD.2009.031838

World Review of Science, Technology and Sustainable Development, 2009 Vol.6 No.2/3/4, pp.166 - 172

Published online: 25 Feb 2010 *

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