布洛芬对好氧颗粒污泥的影响及其去除机理  

Unravelling the mechanism of ibuprofen's effect on aerobic granular sludge and its removal mechanism

作　　者：唐怡 张冰[1] 樊佳炜 时文歆 TANG Yi;ZHANG Bing;FAN Jia-wei;SHI Wen-xin(Key Laboratory of Three Gorges Reservoir Region’s Eco-Environment,Ministry of Education,College of Environment and Ecology,Chongqing University,Chongqing 400045,China)

机构地区：[1]重庆大学环境与生态学院,三峡库区生态环境教育部重点实验室,重庆400045

出　　处：《中国环境科学》2024年第11期6077-6087,共11页China Environmental Science

基　　金：国家自然科学基金资助项目(52270025)。

摘　　要：探索了布洛芬(IBP)对好氧颗粒污泥(AGS)的影响机制,分析了AGS系统去除IBP的效能及机理.结果表明,IBP的存在对AGS体系的氨氮去除率几乎没有影响,对有机物、总氮和磷的去除轻微抑制.AGS系统对0.5mg/L的IBP具有较强抗性,而1.0~5.0mg/L IBP会减少EPS分泌,降低污泥沉降性能,影响功能菌富集,从而不利于AGS系统的稳定.连续120d的测试结果表明,AGS可以通过吸附和降解去除0.5~5.0mg/L的IBP.吸附等温线模型表明AGS主要通过多层吸附作用吸附IBP.IBP的降解途径包括脱羧和羟基化.IBP的长期存在增强了耐药性微生物的增殖,但改变了群落结构,降低了微生物多样性和丰富度,尤其是丝硫菌属(Thiothrix)成为优势属.AGS技术用于处理含抗炎药物(IBP)污水具有良好的应用前景,但高浓度的IBP对AGS系统的性能产生了较大的不利影响,需要引起重视.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.

关 键 词：好氧颗粒污泥 布洛芬 理化特性 吸附降解 微生物群落结构 

分 类 号：X703.1[环境科学与工程—环境工程]