Effect of artificial aeration on the performance of vertical-flow constructed wetland treating heavily polluted river water

作     者：Huiyu Dong Zhimin Qiang Tinggang Li Hui Jin Weidong Chen 

作者机构：State Key Laboratory of Environmental Aquatic ChemistryResearch Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Environmental Protection Bureau of Lin'an CityZhejiang Province 311300China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2012年第24卷第4期

页      面：596-601页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：support from the Ministry of Environmental Protection (No.2008ZX07101-006-08) the Ministry of Science and Technology of China (No. 2009BAC57B02) 

主　　题：vertical-flow constructed wetland artificial aeration polluted fiver water hydraulic loading rate 

摘      要：Three lab-scale vertical-flow constructed wetlands （VFCWs）, including the non-aerated （NA）, intermittently aerated （IA） and continuously aerated （CA） ones, were operated at different hydraulic loading rates （HLRs） to evaluate the effect of artificial aeration on the treatment efficiency of heavily polluted river water. Results indicated that artificial aeration increased the dissolved oxygen （DO） concentrations in IA and CA, which significantly favored the removal of organic matter and NH4＋-N. The DO grads caused by intermittent aeration formed aerobic and anoxic regions in IA and thus promoted the removal of total nitrogen （TN）. Although the removal efficiencies of CODEr, NH4＋-N and TN in the three VFCWs all decreased with an increase in HLR, artificial aeration enhanced the reactor resistance to the fluctuation of pollutant loadings. The maximal removal efficiencies of CODEr, NH4＋-N and total phosphorus （TP） （i.e., 81%, 87% and 37%, respectively） were observed in CA at 19 cm/day HLR, while the maximal TN removal （i.e., 57%） was achieved in IA. Although the improvement of artificial aeration on TP removal was limited, this study has demonstrated the feasibility of applying artificial aeration to VFCWs treating polluted river water, particularly at a high HLR.