• 关键词：非甾体抗炎药  移动床生物膜反应器  填料  比表面积  去除

• 基金项目：江苏省自然科学基金（No.BK20180010）；国家自然科学基金（No.21677071，51978327）

• 吴刚
• 南京大学环境学院, 污染控制与资源化研究国家重点实验室, 南京 210023

• 耿金菊
• 南京大学环境学院, 污染控制与资源化研究国家重点实验室, 南京 210023

• 沈国宸
• 南京大学环境学院, 污染控制与资源化研究国家重点实验室, 南京 210023

• 任洪强
• 南京大学环境学院, 污染控制与资源化研究国家重点实验室, 南京 210023

• 摘要：非甾体抗炎药（Nonsteroidal anti-inflammatory pharmaceuticals，NSAIDs）是污水中高频检出的新兴污染物.污水处理厂对其去除效果不佳，出水中的NSAIDs会对水生生态系统造成潜在不利影响.移动床生物膜反应器（Moving bed biofilm reactors，MBBRs）是一种去除污水中新兴污染物极有潜力的生物处理技术.MBBRs中填料的比表面积对NSAIDs去除影响较大.本研究选用3组不同比表面积的填料（S填料：460 m²·m^-3，M填料：800 m²·m^-3，L填料：1200 m²·m^-3），采用实验室规模的MBBRs运行150 d去除环境浓度（50 μg·L^-1）的NSAIDs—双氯芬酸（Diclofenac，DCF）、萘普生（Naproxen，NPX）和布洛芬（Ibuprofen，IBP），考察了填料比表面积对MBBRs中NSAIDs去除的影响及其潜在的影响机制.结果表明，填料的比表面积对NPX、IBP的去除具有显著影响（p<0.05），对DCF去除效果影响不明显.S、L填料有利于提高生物膜的活性（ATP浓度和脱氢酶活性），而ATP浓度和脱氢酶活性与NPX和IBP的去除呈正相关.门水平上的变形菌门及属水平上的Steroidobacter、Acinetobacter的相对丰度随比表面积增加而提高，且变形菌门及Steroidobacter、Acinetobacter的相对分度与NPX、IBP去除规律一致.本研究揭示了MBBRs中填料比表面积通过影响微生物活性及群落结构从而影响NSAIDs去除的潜在机制，为MBBRs对新兴污染物的去除提供了参考.

• Abstract：Nonsteroidal anti-inflammatory pharmaceuticals (NSAIDs), as a kind of emerging contaminants, were detected frequently in wastewater. NSAIDs cannot be removed efficiently during wastewater treatment process, and the remains of NSAIDs in effluent would cause ecosystem risks toward downside water bodies. Moving bed biofilm reactors (MBBRs) are a promising technology to remove emerging contaminants in wastewater. The specific surface area of biofilm carriers could affect the removal of contaminants in MBBRs. To investigate the effects of specific surface area of biofilm carriers on NSAIDs removal, three laboratory scale MBBRs filled with different specific surface area of biofilm carriers (S carrier: 460 m²·m^-3, M carrier: 800 m²·m^-3 and L carrier: 1200 m²·m^-3) were carried out to remove three NSAIDs-diclofenac (DCF), naproxen (NPX) and ibuprofen (IBP) at the influent concentration of 50 μg·L^-1. The removal of three NSAIDs, biofilm characteristics, microorganism activity and microbial community in MBBRs was investigated. Results indicated that the specific surface area of biofilm carriers significantly affected the removal of NPX and IBP, while not enough to affect the removal of DCF. S and L carrier was beneficial to the enhancement of bioactivity according to the analysis of ATP concentration and TTC-DHA activity. The removal of NPX correlated positively with both the ATP concentration and the TTC-DHA activity. The relative abundance of both Proteobacteria at phyla level and Steroidobacter and Acinetobacter at genus level correlated positively with the specific surface area of biofilm carriers. Proteobacteria, Steroidobacter and Acinetobacter may contribute to the removal of NPX and IBP. Present study revealed that the specific surface area of biofilm carriers affected the NSAIDs removal through altering the microorganism activity and community, which provides insights into the removal of emerging contaminants in MBBRs.

• Key words：nonsteroidal anti-inflammatory pharmaceuticals  MBBRs  biofilm carriers  specific surface area  removal

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