摘要
在连续运行条件下,采用水平潜流人工湿地净化低浓度的生活污水,考察了其净化效果。结果表明,该系统能够有效的降低生活污水中的COD、TN、TP,适合于城镇生活污水的处理。在0.1、0.2 m3/(m2.d)的水力负荷条件下,系统较容易出现死水区;当0.3 m3/(m2·d)的水力负荷条件下,水流呈推流状态,有效容积和水力效率得到提高,去除率分别为90.3%、86.6%和96.7%。试验表明,适当增加水力负荷,有利于污染物的去除。
The subsurface flow artificial wetland under continuous-flow operation condition was used for purifying low concentration domestic sewage.The purification efficiency and influencing factors were investigated.The results show that the system which is suitable for urban domestic sewage treatment can remove the organic substance,nitrogen and phosphorus.Under hydraulic load of 0.3 m^3/（m^2·d）,the removal rates of COD,TN and TP are 90.3%,86.6% and 96.7%,respectively.The water flow is in the plug-flow state and can obtain higher effective capacity and flow rate comparing with the hydraulic load of 0.1,0.2 m3/（m^2·d）when dead zones easily appeared.Increasing the hydraulic load is beneficial to contamination removal.
出处
《环境科学与管理》
CAS
2012年第5期72-74,共3页
Environmental Science and Management
关键词
人工湿地
生活污水
水力负荷
artificial wetland
domestic sewage
hydraulic load
