人工湿地
废水
环境科学
污水处理
反硝化
曝气
环境工程
营养物
湿地
制浆造纸工业
废物管理
化学
生态学
生物
工程类
氮气
有机化学
作者
Rui Zhang,Xianchang Liu,Lutian Wang,Pan Xu,Kai Li,Xiaoxiao Chen,Meng Rong,Yuewu Pu,Xuetong Yang,Diederik P.L. Rousseau,Stijn Van Hulle
标识
DOI:10.1016/j.cej.2022.140906
摘要
A novel waterfall aeration biofilm reactor integrated with a constructed wetland (WABR-CW) system was developed to meet the challenge of decentralized wastewater treatment with a focus on nutrient removal. In a lab-scale experiment of 70 days, the WABR-CW showed a high removal efficiency for COD (85–98 %), NH4+-N (100 %), TN (60–90 %) and TP (85 %-95 %), even when different organic loading rates (OLR) were used. The CW was responsible for improving the overall performance in view of an increased nutrient removal. The CW offers denitrification capacity when the OLR is not optimal for the WABR. Based on the lab-scale experiment, a pilot-scale WABR-CW was built and tested for aquaculture wastewater treatment and reuse. A total of 63 m3 wastewater was treated of which 56.7 m3 was reused. Furthermore, the microbial structure of the WABR-CW system was investigated. A metabolic analysis highlighted the N and C metabolic pathways and functional genes distribution in the WABR-CW system. Next generation sequencing not only linked the pollutants removal performance and microbial encoding genes but also disclosed the potential ability of WABR-CW to treat more polluted and more complex wastewater. The outcomes of this study provide scale-up results and a better understanding of the functioning of the WABR-CW.
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