高羊茅和结缕草对地下渗滤系统中氮磷的去除研究

研究了高羊茅和结缕草覆盖的地下渗滤系统处理生活污水过程两种草坪草对氮、磷的去除作用。研究结果表明:高羊茅含有的总氮浓度在46.8～52.7 g/kg变化,且显著高于结缕草的总氮浓度;高羊茅含有的总磷浓度在4.64～5.89 g/kg之间变化,两种草坪草之间没有显著差异;高羊茅的日平均氮带出量在不同的月份分别为0.237,0.180,0.118 g/(m2.d),显著高于结缕草的日平均氮带出量;高羊茅对生活污水中的氮去除率在2011年9月、10月及11月分别为21.4%,、13.1%和11.8%;高羊茅的日平均磷带出量在不同的月份分别为23.4,15.1,13.8 mg/(m2.d),显著高于结缕草的日平均磷带出量;高羊茅对生活污水中的磷去除率在2011年9月、10月及11月分别为30.2%、24.4%和22.4%。

REMOVAL EFFECTS OF N AND P IN SUBSURFACE WASTEWATER INFILTRATION SYSTEM BY FESTUCA AROUNDINACES SCHREB AND ZOYSIA JAPONICA STEUD

Domestic sewage was treated with subsurface wastewater infiltration system covered by two different turf grasses,namely,Festuca aroundinaces Schres and Zoysia japonica Steud to study the removal effects of N and P.The result show that TN concentration of Festuca aroundinaces Schres varies from 46.8 to 52.7 g/kg and it is significantly higher than that of Zoysia japonica Steud.The TP concentration of Festuca aroundinaces Schres varies from 4.64 to 5.89 g/kg and there are no prominent differences between the two turf grasses.The average nitrogen amount taken out by Festuca aroundinaces Schreb is 0.237,0.180 and 0.118 g/(m2·d) in different month which is significantly higher than that of Zoysia japonica Steud.The nitrogen removal rates of Festuca aroundinaces Schres are 21.4%,13.1% and 11.8% in September,October and November of 2011 respectively.The average phosphorous amount taken out by Festuca aroundinaces Schres is 23.4,15.1and 13.8 mg/(m2·d) in different month which is significantly higher than that of Zoysia japonica Steud.The phosphorous removal rates of Festuca aroundinaces Schres are 30.2%,24.4% and 22.4% in September,October and November of 2011 respectively.