title: Performance evaluation of wastewater treatment using horizontal subsurface flow constructed wetlands optimized by micro-aeration and substrate selection.
abstract: The effects of micro-aeration and substrate selection on domestic sewage treatment performance were explored using three pairs (with or without micro-aeration) of horizontal subsurface flow (HSSF) constructed wetlands (CWs) filled with zeolite, ceramsite or quartz granules. The individual and combined effects of micro-aeration and substrate selection on the purification performance of the experimental-scale HSSF CWs were evaluated. The results showed that micro-aeration significantly increased the treatment efficiencies for chemical oxygen demand, total nitrogen, total phosphorus (TP), ortho-phosphate (PO4(3-)-P) and ammonium nitrogen (NH4+-N) using HSSF CWs, while the substrate selection significantly affected the TP, PO4(3-)-P and NH4+-N removal efficiencies (p<0.05). A two-way analysis of variance (ANOVA) indicated that there was a significant interaction term (i.e. micro-aeration×substrate selection) for NH4+-N removal (p<0.05). Among the three substrates, ceramsite was the best substrate for the treatment of domestic sewage using HSSF CWs. Therefore, the results of this study suggest that a ceramsite-filled HSSF CW with micro-aeration could be the optimal configuration for decentralized domestic sewage treatment.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail: shpcheng@tongji.edu.cn; Marine Fisheries Research Institute of Jiangsu Province, Nantong 226007, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Zhong
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail: shpcheng@tongji.edu.cn.
authors.forename: Juan
authors.initials: J
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail: shpcheng@tongji.edu.cn.
authors.forename: Yanran
authors.initials: Y
authors.lastname: Dai
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail: shpcheng@tongji.edu.cn.
authors.forename: Dongfang
authors.initials: D
authors.lastname: Xiang
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail: shpcheng@tongji.edu.cn.
authors.forename: Shuiping
authors.initials: S
authors.lastname: Cheng
authors.affiliation: Marine Fisheries Research Institute of Jiangsu Province, Nantong 226007, China.
authors.forename: Hongjiu
authors.initials: H
authors.lastname: Ji
mesh_terms: D057919:Biological Oxygen Demand Analysis; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D012722:Sewage / Q000032:analysis; D062065:Wastewater; D018508:Water Purification / Q000379:methods*; D060753:Water Quality; D053833:Wetlands; D017641:Zeolites
chemical_list: D009584:Nitrogen; D010758:Phosphorus; D012722:Sewage; D062065:Wastewater; D017641:Zeolites