沉水植物塘对生活污水的净化效果

Purifying effect of domestic sewage by using a submerged macrophyte pond

分别种植8种植物组成静态模拟沉水植物塘，研究其对生活污水中各种形态氮、磷及有机物的去除效果和规律，其中金鱼藻和水蕴草处理效果最优，可作为沉水植物塘优选植种。实验结果表明：沉水植物塘对污染物具有良好的处理效果，对TP、TDP、PO4-P、TN、NH3-N、COD去除率分别为58．26％～79．34％、60．00％-83．91％、61．32％-86．79％-44．05％-61．54％、35．71％-71．13％、44．35％-72．18％。

Eight kinds of plants have been planted separately, composing a static simulated submerged macrophyte pond. Its removing effects on various forms of nitrogen, phosphorus and organic matter from domestic sewage and their rules have been studied. Hornwort and waterweed have better purifying effect on domestic sewage, and, there- fore, can be used as optimal plants for the submerged macrophyte pond. The results show that the submerged macro- phyte pond has good treatment efficacy. Its TP,TDP,PO43--P,TN,NH3-N,and COD removing rates are 58.26%- 79.34%, 60.00%-83.91%. 61.32%-86.79%, 44.05%-61.54%, 35.71%-71.13 %o and 44.35 %-72.18%, resoectivelv.