Effects of dissolved oxygen on performance and microbial community structure in a micro-aerobic hydrolysis sludge in situ reduction process

Water Research
Tianhao NiuJijun Zhou

Abstract

A sludge process reduction activated sludge (SPRAS), with a sludge process reduction module composed of a micro-aerobic tank and a settler positioned before conventional activated sludge process, showed good performance of pollutant removal and sludge reduction. Two SPRAS systems were operated to investigate effects of micro-aeration on sludge reduction performance and microbial community structure. When dissolved oxygen (DO) concentration in the micro-aerobic tank decreased from 2.5 (SPH) to 0.5 (SPL) mg/L, the sludge reduction efficiency increased from 42.9% to 68.3%. Compared to SPH, activated sludge in SPL showed higher contents of extracellular polymeric substances and dissolved organic matter. Destabilization of floc structure in the settler, and cell lysis in the sludge process reduction module were two major reasons for sludge reduction. Illumina-MiSeq sequencing showed that microbial diversity decreased under high DO concentration. Proteobacteria, Bacteroidetes and Chloroflexi were the most abundant phyla in the SPRAS. Specific comparisons down to the class and genus level showed that fermentative, predatory and slow-growing bacteria in SPL community were more abundant than in SPH. The results revealed that micro-aerat...Continue Reading

References

May 8, 2010·Environmental Science & Technology·Xiao-Meng LiuHan-Qing Yu
Jul 5, 2011·Water Research·Anwar Khursheed, A A Kazmi
Jul 26, 2012·World Journal of Microbiology & Biotechnology·Juliana Cardinali-RezendeAndréa M A Nascimento
Aug 2, 2012·Bioresource Technology·Si-Kyung ChoDong-Hoon Kim
Mar 8, 2013·Biotechnology Advances·Zhiwei WangZhichao Wu
Mar 14, 2014·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Zhen ZhouLuochun Wang
Apr 23, 2014·FEMS Microbiology Ecology·Prem P KandelEdouard Jurkevitch
May 24, 2015·Water Research·Guoqiang Liu, Jianmin Wang

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Citations

Jul 13, 2016·Environmental Technology·Lu CaiXiao-Ming Wan
Oct 11, 2016·Journal of Hazardous Materials·Umamaheswari B, Rama Rajaram
Jul 14, 2017·The Science of the Total Environment·Galilee U SemblanteLong D Nghiem
Mar 10, 2018·International Journal of Environmental Research and Public Health·Xiao BianKaijun Wang
Jul 25, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Yonglei WangZedong Zheng
Jul 1, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·L P SunM Wang
May 1, 2020·Frontiers in Microbiology·Eleni BratanisEwa Bukowska-Faniband
Feb 26, 2021·Archaea : an International Microbiological Journal·Viola CorbelliniFrancesca Malpei
Jan 11, 2020·The Science of the Total Environment·Qing ChenZihao Zhao

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