三段A/O工艺处理发制品产业集聚区综合废水

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Abstract

A three step feed A/O process was utilized as a secondary biological treatment unit to treat comprehensive wastewater from hair product production cluster area. The removals of chemical oxygen demand (COD), TN, PO₄^3--P and the features of microbial communities were investigated at different inflow distribution and sludge return. With volume distribution ratio of anoxic and oxic zone 1:1, solid residence time (SRT) 20d, hydraulic retention time (HRT) 16h, inflow distribution and sludge return were 60%:25%:15% and 75%, average TN and COD concentrations were 14.85mg/L and less than 40mg/L, respectivekly, in effluents from the three step feed A/O process. At the same time, removal efficiency of PO₄^3--P reached the maximum value of 56.21%. Relative abundances of Proteobacteria and Bacteroidetes, the dominating phyla for treating comprehensive wastewater, were 45.63%~60.13% and 16.65%~30.55%. The increasing relative abundances of Denitratisoma, Thauera, uncultured -f -Saprospiraceae, Sulfuritalea, et al. was the essential embodiment that removal efficiency of TN increased with the increase of inflow distribution in the first step or the decrease of sludge return.

Key words： step feed A/O process hair product inflow distribution sludge return nitrogen and phosphorus removal

Received: 24 September 2017

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	Articles by authors
	XIAO Cai-lin
	SHEN Jian-hua
	YANG Yang
	LI Rui-hua

Cite this article:

XIAO Cai-lin,SHEN Jian-hua,YANG Yang等. Utilizing three step feed A/O process to treate comprehensive wastewater from hair product production cluster area[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(4): 1304-1311.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I4/1304

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