| MBBR及UVC高级氧化技术深度处理典型医药品微污染物效能 |
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| 引用本文： | 周康,王贞凯,张桂成,陈新安,程艳,罗刚,孙胜鹏.MBBR及UVC高级氧化技术深度处理典型医药品微污染物效能[J].环境工程,2022,40(5):37-43. |
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| 作者姓名： | 周康 王贞凯 张桂成 陈新安 程艳 罗刚 孙胜鹏 |
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| 作者单位： | 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; |
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| 基金项目： | 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) |
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| 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H2O2、HSO-5和S2O2-8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H2O2、HSO-5和S2O2-8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/H2O2工艺相比,UVC/S2O2-8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。
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| 关 键 词： | 微污染物 医药品 MBBR 高级氧化 深度处理 |
| 收稿时间： | 2021-07-09 |
BIODEGRADATION AND TERTIARY TREATMENT EFFICIENCIES OF TYPICAL PHARMACEUTICAL MICROPOLLUTANTS BY MBBR AND UVC-BASED ADVANCED OXIDATION PROCESSES |
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| Affiliation: | 1. School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China;2. Ningbo Sentrol Environmental Conservation Equipment Co., Ltd, Ningbo 315000, China;3. Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China |
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| Abstract: | 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 H2O2, HSO-5 and S2O2-8 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, 653.3 μg/(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 H2O2, HSO-5 and S2O2-8 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/H2O2 process, UVC/S2O2-8 and UVC/HSO-5 processes exhibited higher selectivity toward the degradation of the target pharmaceutical micropollutants. |
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