无机絮凝剂对SBR系统中活性污泥的影响研究

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Abstract

This study explored the addition of two inorganic flocculants, polyaluminum chloride (PAC) and polyferric chloride (PFC), to the activated sludge in a SBR system. The influences on the sludge shape, floc size, sedimentation performance, biomass, EPS component, microbial activity and diversity were systematically investigated. The results showed that sludge floc were both more compact and marginalized after addition of these two inorganic flocculants. The floc median particle size respectively increased by 34.78% and 12.90% after addition of PAC and PFC.However,the sludge sedimentation performance and sludge activity deteriorated due to the accumulation of PAC and PFC. It was also found that the addition of inorganic flocculants had reduced the microbial activity and diversity, hence deceased the EPS secreted by microorganisms.

Key words： flocculant polyaluminum chloride polyferric chloride SBR activated sludge

Received: 28 November 2019

PACS:

X703

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	Articles by authors
	QIAN Yu-lan
	LI Yan
	QIAO Liang
	LI Ying-xue

Cite this article:

QIAN Yu-lan,LI Yan,QIAO Liang等. Effect of the addition of inorganic flocculants on the activated sludge in a SBR system[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(6): 2445-2453.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I6/2445

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