MBBR及UVC高级氧化技术深度处理典型医药品微污染物效能  

BIODEGRADATION AND TERTIARY TREATMENT EFFICIENCIES OF TYPICAL PHARMACEUTICAL MICROPOLLUTANTS BY MBBR AND UVC-BASED ADVANCED OXIDATION PROCESSES

作　　者：周康 王贞凯 张桂成 陈新安 程艳 罗刚 孙胜鹏 ZHOU Kang;WANG Zhen-kai;ZHANG Gui-cheng;CHEN Xin-an;CHENG Yan;LUO Gang;SUN Sheng-peng(School of Chemical and Environmental Engineering,College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou 215123,China;Ningbo Sentrol Environmental Conservation Equipment Co.,Ltd,Ningbo 315000,China;Department of Environmental Science and Engineering,Fudan University,Shanghai 200438,China)

机构地区：[1]苏州大学材料与化学化工学部化工与环境工程学院,江苏苏州215123 [2]宁波神筹环保设备有限公司,浙江宁波315000 [3]复旦大学环境科学与工程系,上海200438

出　　处：《环境工程》2022年第5期37-43,共7页Environmental Engineering

基　　金：江苏高校优势学科建设工程项目(PAPD)宁波国家高新区(新材料科技城)重大科技专项(20181CX050011)。

摘　　要：研究了移动床生物膜反应器(MBBR)对废水中6种典型医药品微污染物的生化去除特性,对比探究了短波紫外光(UVC)活化H_(2)O_(2)、HSO^(-)_(5)和S_(2)O_(8)^(2-)工艺在连续流模式下对MBBR生化出水中残余目标医药品的深度处理效能。结果显示:MBBR能有效降解避蚊胺、吉非罗齐和布洛芬,其平均降解速率分别为835.5,889.2,653.3μg/(L·d),但难以有效去除卡马西平、克罗米通和甲氧苄啶。目标医药品微污染物对MBBR中有机碳源去除和氨氮的硝化过程影响较小。高通量基因测序结果表明:MBBR中的优势菌群包括变形菌门(65.6%)、浮霉菌门(14.8%)、拟杆菌门(7.4%)和绿弯菌门(4.2%);优势菌属包括生丝微菌属(31.6%)、甲基娇养杆菌属(10.7%)、SMIA02(9.6%)和OLB12(4.9%)。UVC活化H_(2)O_(2)、HSO^(-)_(5)和S_(2)O_(8)^(2-)工艺能够有效降解MBBR出水中残余的目标医药品微污染物,在氧化剂浓度为1.0 mmol/L的条件下,目标医药品去除率达到92.7%~99.4%。与UVC/H_(2)O_(2)工艺相比,UVC/S_(2)O_(8)^(2-)和UVC/HSO^(-)_(5)工艺对目标医药品微污染物的去除具有更明显的选择性。This study investigated the biological degradation behavior of 6 typical pharmaceutical micropollutants in wastewater by a moving bed biofilm reactor(MBBR).The tertiary treatment of the residual target micropollutants from the MBBR effluents by UVC-activated H_(2)O_(2),HSO^(-)_(5) and S_(2)O_(8)^(2-) processes were further investigated under a continuous-flow mode.The results showed that the MBBR process was capable of efficiently degrading N,N-diethyl-meta-toluamide,gemfibrozil and ibuprofen(e.g.,their mean degradation rates achieved 835.5,889.2,653.3μg/(L·d),respectively);which however was inefficient in degrading carbamazepine,crotamiton and trimethoprim.The presence of the target pharmaceuticals exhibited negligible impacts on the organic carbon source removal and ammonium nitrification in the MBBR.The high-throughput sequencing results indicated that the majority of microbial communities in the MBBR were classified to the phylum Proteobacteria(65.6%),Planctomycetes(14.8%),Bacteroidetes(7.4%)and Chloroflexi(4.2%);and the major genera included Hyphomicrobium(31.6%),Methylotenera(10.7%),SMIA02(9.6%)and OLB12(4.9%).UVC-activated H_(2)O_(2),HSO^(-)_(5) and S_(2)O_(8)^(2-) processes could efficiently degrade the residual pharmaceutical micropollutants from the MBBR effluent,92.7%~99.4%degradation efficiencies of the target pharmaceuticals were obtained by using 1.0 mmol/L of oxidants under the given conditions.In comparison with UVC/H_(2)O_(2) process,UVC/S_(2)O_(8)^(2-) and UVC/HSO^(-)_(5) processes exhibited higher selectivity toward the degradation of the target pharmaceutical micropollutants.

关 键 词：微污染物 医药品 MBBR 高级氧化 深度处理 

分 类 号：X799.5[环境科学与工程—环境工程]