Zhong Fei, Wu Juan, Dai Yanran, Xiang Dongfang, Cheng Shuiping, Ji Hongjiu
State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail:
Marine Fisheries Research Institute of Jiangsu Province, Nantong 226007, China.
Water Sci Technol. 2015;71(9):1317-24. doi: 10.2166/wst.2015.090.
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.
利用三对（有或无微曝气）填充有沸石、陶粒或石英砂的水平潜流（HSSF）人工湿地（CWs），探究了微曝气和基质选择对生活污水处理性能的影响。评估了微曝气和基质选择对实验规模HSSF CWs净化性能的单独和联合影响。结果表明，微曝气显著提高了HSSF CWs对化学需氧量、总氮、总磷（TP）、正磷酸盐（PO4(3-)-P）和铵态氮（NH4+-N）的处理效率，而基质选择显著影响了TP、PO4(3-)-P和NH4+-N的去除效率（p<0.05）。双向方差分析（ANOVA）表明，对于NH4+-N的去除存在显著的交互项（即微曝气×基质选择）（p<0.05）。在三种基质中，陶粒是使用HSSF CWs处理生活污水的最佳基质。因此，本研究结果表明，带微曝气的填充陶粒的HSSF CW可能是分散式生活污水处理的最佳配置。
