人工湿地处理农村分散性生活污水的效能研究

Effects of Constructed Wetland in Treating the Countryside Scattered Sewerage Water

利用一个自行构建的小型示范性人工湿地,考察其对分散性生活污水的处理效能,以便为水量少、波动大、污水成分相对简单的分散性污水处理提供一条经济有效的途径.结果表明:湿地系统植物移栽20天后恢复良好,栽植培育1个月后即可连续满负荷进水.稳定运行后,水力停留时间为48h,人工湿地对COD、氨氮和总磷的平均去除率分别超过80%、55%和55%,出水可达标排放.结果表明,对于分散性生活污水,可采用人工湿地的方法对其进行处理,以弥补分散性生活不便收集、多数直接排入地表水体,一些地区污水处理率较低的问题.

By constructing a normal wetland its effect in treating scattered sewerage water was conducted.Therefore an economic and effective waste water treatment method will provide for it, which has the characteristics of total water yield being little and big fluctuation, constituent being simple relatively.The results show. the transplants flourished in constructed wetland after 20 days; After 30 day plant breeding the wetland could operate under full load.During stable operation period the mean removal rates of wetland for COD, NH4＋-N and TP were 80~//0,55% and 55 ~ respectively when the HRT was 48 hours. And the wetland effluent reached the discharge standard of sewage. These results demonstrate that scattered sewerage water can be treated with constructed wetland so that the problems of scattered sewerage water as collection being of difficulty, most sewerage discharging directly and treatment rate of sewerage of some areas being too low will be solved.