Authors: Yanchen Liu Qian Dong Chen Wu Xiaohong Zhou Hanchang Shi
Publish Date: 2015/01/17
Volume: 22, Issue: 12, Pages: 9250-9259
Abstract
The biological reaction process of sulfur in biofilms and sediments causes serious problems of corrosion and odor in sewage systems This study aims to reveal the distribution and shift of microbial diversity that survives inside the sediment in response to surrounding changes in sewage systems The successions of microbial community were compared via denaturing gradient gel electrophoresis and by constructing phylogenetic trees via maximum likelihood method The results indicated that the shift of microbial diversity is not significant along the vertical layer inside the sediment The influences of sediment accumulation time on the shift in microbial diversity are evident particularly with the switch of the accumulation stage Implementing a control strategy for oxygen injection and nitrate addition evidently inhibits and stimulates some dominant sulfatereducing bacterial strains in the sediment The diversity in the total bacteria is positively related with ORP dissolved oxygen and sulfide concentrationThis research was supported by the National Natural Science Foundation of China No 50908131 Major Science and Technology Program for Water Pollution Control and Treatment of China No 2011ZX07301002 State Environmental Protection Key Laboratory of Microorganism Application and Risk Control Open Fund No MARC2012D003 and Tsinghua University Initiative Scientific Research Program No 20121087922
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