静态条件下沉水植物净化污水厂尾水能力研究

为了解沉水植物对污水处理厂尾水水质净化效果,研究了滇池流域常见的5种沉水植物对昆明市第五污水处理厂尾水的净化能力。通过室外模拟、实验室测定,分析了单一种沉水植物对水环境质量的改善能力。结果表明:5种沉水植物均有一定能力去除水体中总磷、总氮、氨氮、COD,但随着沉水植物的生长,其叶片的腐烂分解又提高了水体氮磷等有机物的含量。该研究从水体水质的多个指标可见,苦草、马来眼子菜和金鱼藻在各方面表现能力均较强,可作为滇池流域河道水体修复优先选用的物种。以污水厂活性污泥和红壤混合物作为底质,在静态条件下菹草和浮叶眼子菜在污水厂尾水中很难长期存活下来,作为构建富营养化水体生态修复方案还需进一步研究。

Expermiental Study on Tailwater Purification with Submerged Macrophyte Under Static Conditions

In order to understand the purification effects to tailwater with submerged macrophyte,in the field of the wastewater plant in Kunming County,an experiment was carried out to investigate.The result showed that,submerged macrophyte had the capacity of removing total nitrogen,total phosphorus,ammonia,COD,but with the growth of submerged macrophyte and its leaf decomposition,the content of nitrogen,phosphorus and organic matter was increased.This research can be seen from multiple indicators of water quality,the performance ability of Ceratophyllum demersum,Potamogeton malaianu and Vallisneris spiralis were strong and can be used as the preferred species in Dianchi watershed Under static conditions Potamogeton crispus Linn and Potamogeton natans were difficult to survive,and the construction of ecological restoration of eutrophic programme required further study.