布洛芬对好氧颗粒污泥的影响及其去除机理

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Abstract The mechanism of ibuprofen's (IBP) effect on aerobic granular sludge (AGS) was explored and the efficacy and mechanism of IBP removal by AGS system were analyzed. The presence of IBP had little effect on ammonia nitrogen removal in AGS system, and slightly inhibited the removal of organic matter, total nitrogen, and phosphorus. The AGS system was highly resistant to 0.5mg/L IBP, whereas 1.0~5.0mg/L IBP reduced the secretion of EPS, lowered the performance of sludge settleability, and affected the enrichment of functional bacteria, which was detrimental to the stability of the AGS system. The results of 120 consecutive days of experiment showed that AGS could remove 0.5~5.0mg/L of IBP through adsorption and degradation. Adsorption isotherm modelling indicated that AGS adsorbed IBP mainly through multilayer adsorption. The degradation pathways of IBP include decarboxylation and hydroxylation. The prolonged presence of IBP enhanced the proliferation of drug-resistant microorganisms, but altered the community structure and reduced microbial diversity and abundance, with Thiothrix, in particular, becoming the dominant genus. In conclusion, AGS technology has good application prospects for treating wastewater containing anti-inflammatory drugs (IBP), but the high concentration of IBP has a large negative effect on the performance of the AGS system, which requires more attentions.

Key words： aerobic granular sludge ibuprofen physicochemical properties adsorptive and degradation microbial community structure

Received: 19 March 2024

PACS:

X703.1

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	TANG Yi
	ZHANG Bing
	FAN Jia-wei
	SHI Wen-xin

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TANG Yi,ZHANG Bing,FAN Jia-wei等. Unravelling the mechanism of ibuprofen's effect on aerobic granular sludge and its removal mechanism[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(11): 6077-6087.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I11/6077

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