杨树林地生活污水生态处理研究

Study on Domestic Wastewater Treatment with Poplar Woodland

选择了4种杨树品种作为污水处理的植物材料,利用杨树林地处理污水,对杨树林地生活污水生态处理技术进行了研究。结果表明:2001杨、107杨与72杨适合于作为污水处理的植物材料,杨树林地生活污水处理的适宜水力负荷为600~900 m^3/(hm^2·周),46杨不适合于作为污水处理植物材料。根据村镇生活污水排放量与不同杨树品种对生活污水的处理能力,确定所需林地面积,建沉淀池、贮水池,安装污水消毒设备,对生活污水进行预处理,每周投配1次,根据地下水水质变化调节污水水力负荷。该项技术提高了杨树与林下植物生长量,净化了农村生活污水,适用于那些没有建立污水处理厂或污水量达不到建立污水处理厂的要求的村镇。

Four poplar varieties were selected as plant material for domestic wastewater treatment, and poplar woodland was used for domestic wastewater disposal sites. The results showed that the three poplar varieties include poplar 2001, 107 and 72 were suited as wastewater plant material. The suitable hydraulic loading rates was from 600 to 900 m3/（hm^-2.week）in slow rate system. Poplar 46 was not suitable for wastewater plant material. The poplar woodland area was determined and sedimentation tank was constructed according to wastewater discharge and disposal effectiveness of different poplar varieties. Then pretreatment of domestic wastewater was implemented. The hydraulic loading rates were adjusted according to the change of groundwater quality. The technique implement increased growth of poplar and understory plant, purified domestic wastewater. The technology was suitable to apply for villages and small towns which wastewater treatment works were not set up or wastewater volume was short of require setting up wastewater treatment works.