生物吸附/MBR/硫铁自养反硝化组合工艺优化研究

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Abstract In order to realize the effect of deep nitrogen and phosphorus removal, a combined biological adsorption-MBR-sulfur/iron autotrophic denitrification process was optimized, and the influence of HRT and volume ratio of sulfur-iron to nitrogen and phosphorus removal were both investigated. The experimental results showed that the optimal contaminants removal performance was achieved when the respective HRT of MBR and sulfur/iron autotrophic denitrification filter was 9h and 3h, and 63% of COD was adsorbed by biological adsorption process. The average effluent COD, NH₄⁺-N, NO₃^--N and TN were 18.9, 0.36, 0 and 3.3mg/L, respectively, which was beneficial for deep nitrogen and phosphorus removal. In addition, the average effluent TP was as low as 0.29mg/L as the volume ratio of sulfur and iron was 3:1 in the sulfur/iron autotrophic denitrification filter. Most of nitrate was reduced in the region of 10 to 30cm height in the sulfur/iron autotrophic denitrification filter, and the corresponding nitrogen removal rate was 46.1gNO₃^--N/(m³×h). Furthermore, it was found that the membrane fouling could be effectively alleviated by providing intermittent suction to membrane module and high aeration rate to MBR process.

Key words： biological adsorption membrane fouling sulfur autotrophic denitrification chemical phosphorus removal

Received: 30 October 2017

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Corresponding Authors: 王硕,副教授,shuowang@jiangnan.edu.cn E-mail: shuowang@jiangnan.edu.cn

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	ZHI Yao
	ZHANG Guang-sheng
	QIAN Kai
	LI Ji
	WANG Shuo

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ZHI Yao,ZHANG Guang-sheng,QIAN Kai等. Research on optimal operation by a combined biological adsorption-MBR-Sulfur/Iron autotrophic denitrification process[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(6): 2097-2104.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I6/2097

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