响应面法优化亚硝酸型同步脱氮除硫工艺研究

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Abstract The simultaneous sulfide and nitrite removal process was carried out in the EGSB reactor. Based on the response surface experimental design, the interaction effects of substrate concentration, HRT and circulation ratio on the performance of substrate removal and elemental sulfur yield were investigated, furthermore operating conditions of the process were optimized according to the model results. The results revealed that substrate concentration had a significant effect on the substrate removal performance and elemental sulfur yield of the process. High substrate concentration led to elemental sulfur formation but not to substrate removal, whereas increases in HRT and circulation ratio helped to mitigate the negative effects of high substrate concentration. In view of response surface model optimization, the optimal operating conditions of the process were: influent sulfide concentration of 640.00mg S/L, HRT of 2h and circulation ratio of 30, sulfide and nitrite removal percentage could reach (99.90%±0.03%) and 100.00%, and the elemental sulfur yield could reach (77.75%±0.84%).

Key words： simultaneous sulfide and nitrite removal process substrate concentration HRT recycle ratio response surface methodology

Received: 15 February 2023

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X52

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	Articles by authors
	WANG Kai-quan
	LIANG Na
	ZHU Xiao-peng
	ZHANG Kai-yu
	CAI Jing

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WANG Kai-quan,LIANG Na,ZHU Xiao-peng等. Optimization of simultaneous sulfide and nitrite removal process based on response surface methodology[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(S1): 103-109.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/IS1/103

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