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	Unveiling organic loading shock-resistant mechanism in a pilot-scale moving bed biofilm reactor-assisted dual-anaerobic-anoxic/oxic system for effective municipal wastewater treatment
	Li, Jia1,2,3; Zheng, Lei2; Ye, Changbing3; Zhou, Zhiming3; Ni, Baosen3; Zhang, Xiaomei4; Liu, Hong2
	2022-03-01
摘要	Microbial biomass and activity are frequently subjected to organic loading shock (OLS) from decentralized municipal wastewater. A hybrid moving bed biofilm reactor-assisted dual-anaerobic-anoxic/oxic system (D-A(2)MBBR) was established by integrating dual-anaerobic-anoxic/oxic with moving bed biofilm reactor to resist OLS for stable nutrients removal. The D-A(2)MBBR achieved 91.57% of chemical oxygen demand, 93.33% of ammonia-nitrogen, 80.20% of total nitrogen and 92.68% of total phosphorus removal, respectively, under the fluctuation of organic loading rate from 417.9 to 812.0 g COD m(-3) d(-1). The 16S rRNA gene sequencing revealed that Gemmobacter (7.28%) was identified as dominating anoxic denitrifying genus in oxic chamber, confirming the coexistence of aerobic and anaerobic/anoxic micro-environments. This circumstance boosted simultaneous nitrification-denitrification and phosphorus removal and the microbial community evolution inside the multilayer biocarrier-attached biofilms. In general, the D-A(2)MBBR was able to provide unique, cooperative and robust bacterial consortia to form a buffer against OLS, and ensuring effluent stability.
关键词	Organic loading shock Biocarrier-attached biofilms Microbial structure Nutrients removal
DOI	10.1016/j.biortech.2021.126339
发表期刊	BIORESOURCE TECHNOLOGY
ISSN	0960-8524
卷号	347页码:11
通讯作者	Liu, Hong(liuhong@cigit.ac.cn)
收录类别	SCI
WOS记录号	WOS:000784288700001
语种	英语