廊道式人工湿地处理新农村生活污水的应用研究

摘要

[Objective] The aim was to study on application of channels constructed wetland in treatment of domestic sewage in new countryside. [Method] Supported by construction of new rural area project in China, we made survey on new rural areas in Gannan, Jiangxi Province , summarized source, characteristics and treatment of domestic sewage in countryside, and designed channels constructed wetland for sewage treatment. [Result] The technique is proved effective in sewage treatment. After the technique was conducted for a trial run for four months, removal rates of COD, TP and 77V averaged 73.07% , 73.25% and 72. 36% , respectively. After continuous sampling for six times, COD was 20 -35 mg/L, TP was 0.60 - 1.19 mg/L and 77V was 6. 88 - 11.21 mg/L, which proved the indices of discharged water were better than that of Standard 1B ruled by Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant. [ Conclusion] Thanks for low investment, channels constructed wetland can be realized by transformation of bottom land, proving a good way for treatment of diffuse pollution source and control of water non-point pollution.%[目的]对廊道式人工湿地处理新农村生活污水的应用进行研究.[方法]依托国家新农村建设项目对江西赣南地区的新农村调查,对农村生活污水的来源、特征和处理要求进行总结,并设计利用一种改进性人工湿地——廊道式人工湿地处理农村生活污水,并对其效果进行考察.[结果]该工艺对农村生活污水具有良好的处理效果,试运行4个月后对COD、TP、TN的平均去除率分别为73.07％、73.25％、72.36％,连续6次采样分析其出水COD为20～35 mg/L、TP为0.60～1.19 mg/L、TN为6.88～11.21 mg/L,出水指标优于《城镇污水处理厂污染物排放标准》一级B标准.[结论]廊道式人工湿地造价低廉,可通过低洼地改造实现,是处理农村分散污染源,控制流域面污染的很好补充.