中国生态农业学报2011，Vol.19Issue(4)：912-917,6.DOI:10.3724/SP.J.1011.2011.00912
垂直流人工湿地出水口位置与植物种类对农村生活污水净化效果的影响
Effects of outlet positions and plant species on rural domestic sewage purification in engineered vertical flow wetland
摘要
Abstract
In this study, four different types of engineered vertical flow constructed wetland (VF-CW) - Canna indica Linn wetland (M), Penmsetum alopecuroides (Linn.) Sprcng wetland (L), Sorghum sudanense (Piper) Stapf wetland (S) and control wetland without plant (CK) - were used to determine the effects of outlet positions (high, middle and low position) and plant species on pollutant removal efficiency in rural domestic sewages. Domestic sewages from anaerobic tanks in the Changshu Agro-ecological Experimental Station were intermittently used to irrigate VF-CW at hydraulic loading rate of 0.15 m3m-2d-1. Results showed that the outlet position significantly determined the removal efficiency of NH4+-N, NO3 -N and COD (chemical oxygen demand) in rural domestic sewages. The removal rate of NH4+-N significantly increased with lowering of the outlet position. The maximum removal rate of NH4-N was 98.3%. However, the removal rate of NO3~-N and COD significantly decreased with lowering of the outlet position. The removal rates of NO3~-N and COD of the highest outlet were -47.4% and 64.5%, respectively. The removal rate of total nitrogen (TN) of the high outlet increased by 22.5%~27.6% compared with that of the middle and low outlets. On the contrary, the removal efficiency of total phosphorus (TP) of the high outlet was 20.6%~28.9% lower than that of middle and low outlets. Compared with the control treatment (CK), the removal rates of NO3~-N, TN, TP and COD in VF-CW with C. Indica, P. Alopecurvidesand S. Sudanense significantly increased by 74.4%~98.6%, I1.3%~17.8%, 8.60%~16.3% and 14.1%~I9.O%, respeclively. However, no significant differences were noted among VF-CWs with three plant species regarding the removal of NCV -N, TN, TP and COD. In term of the removal rate of NH/-N, C. Indica wetland performed significantly less than the other plant species VF-CWs. These results suggested that pollutant removal efficiency improved by controlling outlet position and growing plants in VF-CW systems.关键词
垂直流人工湿地/出水口位置/植物种类/生活污水/污染物去除率Key words
Engineered vertical flow wetland/ Outlet position/ Plant species/ Domestic sewage/ Pollutant removal efficiency分类
资源环境引用本文复制引用
刘芬芬,王德建..垂直流人工湿地出水口位置与植物种类对农村生活污水净化效果的影响[J].中国生态农业学报,2011,19(4):912-917,6.基金项目
中国科学院知识创新工程项目(KZCX2-YW-440)和国家科技支撑计划项目(2006BAJ10B06)资助 （KZCX2-YW-440）
