摘要
研究出水口位置对垂直潜流人工湿地净化的影响。垂直潜流人工湿地以间歇进水方式运行,进水水力负荷为0.125m3/(m2.d),进水来自南宁市琅东污水处理厂初沉池出水。研究结果表明,出水口位置对垂直潜流人工湿地净化有显著影响。与底部出水相比,中部出水的TN、SS和COD去除率分别提高了8.01%、8.48%、7.99%,出水NO-3-N质量浓度降低了9.38 mg/L;但NH+4-N去除率则降低了26.25%,TP去除率降低了21.21%。
The aim of this investigation was to study the effect of the outlet position on the removal efficiency of vertical subsurface-flow constructed wetlands （VF CWs）. Intermittent feeding was carried out with a hydraulic loading rate of 0. 125 m3/（m2 · d） in the experiment. The wetland was fed with settled urban wastewater, which was ob- tained from the primary sedimentation tank of Langdong sewage treatment plant. The results of the study indicated that the outlet position played a great role on the removal efficiency of VF CWs. Compared with the bottom outlet op- eration, the removal rate of the middle outlet operation increased by 8.01 %, 8.48 % and 7.99 % for TN,SS, COD re- spectively, decreased by 26. 25% and 21. 21% for NH＋-N and TP respectively, and the mass concentrations of NOs-N decreased 9.38 mg/L.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2010年第3期64-66,70,共4页
Environmental Pollution & Control
基金
广西科学研究与技术开发计划项目(桂科攻0663001-6)
关键词
垂直潜流人工湿地
出水口位置
饱和水层
vertical subsurface-flow constructed wetlands
outlet position
saturated zone
