CANON生物膜载体储存及活性恢复研究

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Abstract

The activity recovery effect of CANON-MBBR reactor which had experienced short-term storage at low temperature (20days, 15℃) and low load operation at room temperature (25℃) was studied by using different recovery methods. The results showed that the recovery rate of TN removal load reached 102% by recovering the temperature first and then slowly increasing the influent load. If the influent load was directly raised to the original level without the increase of temperature, the detachment of biofilms of the suspended carriers could happen due to the decrement of EPS content, therefore the recovery rate of TN removal load was lowered to 84%. In addition, the recovery rate of TN removal load reached 96% after 25days of SBR operation under low load and normal temperature (25℃) by the same recovery method. The dominant functional microorganisms in CANON-MBBR system were identified as Nitrosomonas and Candidatus Kuenenia. The relative abundance of both genus could reach over 11% and 27% respectively after the system entered the stable operation by appropriate recovery methods. The microbial composition of biofilms was not significantly influenced by the biofilm detachment.

Key words： CANON MBBR suspended carrier storage low load operation activity recovery

Received: 14 October 2019

PACS:

X703.5

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	Articles by authors
	HAN Wen-jie
	WU Di
	ZHOU Jia-zhong
	HUANGPU Xiao-liu
	LI Guo
	HE Qiang
	KAN Yu-jiao

Cite this article:

HAN Wen-jie,WU Di,ZHOU Jia-zhong等. Research on the storage and activity recovery of CANON suspended carrier biofilm[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(5): 2062-2072.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I5/2062

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