改良填料生物滞留池处理初期雨水性能探究

Study on the performance of the improved media biological retention basin for initial rainwater treatment

针对目前生物滞留池对N、P去除波动较大以及如何进一步提高生物滞留池处理性能的问题,开展了改良填料生物滞留池处理初期雨水的研究。首先探讨了传统生物滞留池填料和粉煤灰+椰糠、沸石+椰糠、给水厂污泥+椰糠、沸石+给水厂污泥等4种改良生物滞留池填料对N、P吸附和解吸附特性,再通过模拟柱试验分析了含有不同填料的生物滞留池对初期雨水的处理性能。结果显示,改良填料能明显提升生物滞留池对TP、NH_(3)-N、TN、COD的去除效果,对SS去除效果也有一定提升;4种改良填料生物滞留池中给水厂污泥+椰糠改良填料生物滞留池处理初期雨水的综合性能更优。

In view of the large fluctuations in the removal of N and P in the current biological retention basin and how to further improve the treatment performance of the biological retention basin,a study on the treatment of initial rainwater by an improved media biological retention basin was carried out.Firstly,it discusses the adsorption and desorption of N and P by the traditional biological retention basin media and four modified bio-retention basin media,i.e.,the traditional biological retention basin media with fly ash+coconut bran,zeolite+coconut bran,water supply plant sludge+coconut bran,and zeolite+water supply plant sludge,respectively.Characteristics were then analyzed by evaluating the initial rainwater treatment performance of biological retention basin containing different media through simulated column tests.The results show that the improved media can significantly enhance the removal effect of TP,NH_(3)-N,TN,COD in the biological retention basin,and also enhance the removal effect of SS;among the four modified media in the biological retention basin,water supply plant sludge+coconut bran modified media shows the best general performance on the initial rainwater treatment.