流出物
药品和个人护理产品的环境影响
环境科学
湿地
废水
污水处理
人工湿地
环境工程
水力停留时间
制浆造纸工业
生态学
工程类
生物
作者
Jiaxi Wang,Yunqiang Wang,Hui Lin,Wang Jiu-si,Liping Chen,Yanzhou Ding,Shuai Feng,Jingjing Zhang,Beibei Ye,Xiping Kan,Qian Sui
标识
DOI:10.1016/j.jhazmat.2023.131095
摘要
Constructed wetlands (CWs) are usually operated at low hydraulic load rates (HLRs) of < 0.5 m3/m2/d, and can efficiently remove pharmaceuticals and personal care products (PPCPs) from wastewaters. They however often occupy a large area of land, especially when treating the secondary effluent from wastewater treatment plants (WWTPs) in megacities. High-load CWs (HCWs) with an HLR ≥ 1 m3/m2/d, requiring smaller land areas, are a good option for urban areas. However, their performance for PPCP removal is not clear. In this study, we evaluated the performance of three full-scale HCWs (HLR: 1.0-1.3 m3/m2/d) to remove 60 PPCPs, and found they had a stable removal performance and a higher areal removal capacity than the previously reported CWs operated at low HLRs. We verified the advantages of HCWs by testing the efficiency of two identical CWs at a low HLR (0.15 m3/m2/d) and a high HLR (1.3 m3/m2/d) fed with the same secondary effluent. The areal removal capacity during the high-HLR operation was 6-9 times higher than that during the low-HLR operation. A high dissolved oxygen content, and low COD and NH4-N concentrations in the secondary effluent were critical for the robust PPCP removal by tertiary treatment HCWs.
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