硫自养短程反硝化探究及响应面法回收单质硫

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Abstract The effects of HRT, pH and temperature on the reaction process were investigated by batch test using the partial sulfide autotrophic denitrifying sludge successfully started by the author's laboratory as inoculated sludge. The results showed that when the control parameters HRT was 5h, pH 7.5and temperature 30℃, the accumulation of nitrite and elemental sulfur reached 92.53% and 59.36%, respectively, and the optimal accumulation effect of target products was achieved. High-throughput analysis of microbial samples from sludge under optimal conditions showed that Proteobacteria was the main bacterium in autotrophic denitrification with a abundance of 91.44%, while Thiobacillus was 66.04%, which was the main contributor to the stabilization of sulfur and nitrite in the partial sulfide autotrophic denitrification process. The results of response surface optimization indicated that when the dosage of PAC was 7.73mL/L, pH was 4.53, and stirring speed was 220r/min, the best matching parameters for biological sulfur flocculation were achieved. The average sulfur flocculation rate (SFE) was 88.1%.

Key words： partial sulfide autotrophic denitrification HRT nitrite accumulation response surface methodology recovery of biological elemental sulfur

Received: 20 June 2022

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X703

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	LI Wei-wei
	ZHANG Yong-xian
	YUAN Zhong-ling
	WU He-long
	CHEN Yong-zhi

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LI Wei-wei,ZHANG Yong-xian,YUAN Zhong-ling等. Study on influencing factors of partial sulfide autotrophic denitrification and response surface methodology for recovery of biological elemental sulfur[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(1): 217-224.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I1/217

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