污水芦苇湿地处理系统示范工程的研究

Study on an Examplary Project of Wetland Waste Water Treatment.

该示范工程处理水量500m^3/d,在水力负荷为5cm/d条件下,BOD^5、SS、总氮和大肠杆菌的去除率分别为85.8％、93.8％、64.6％和99.9％。出水平均值分别为17.8mg/L、17.0mg/L、5.1mg/L和<8.1个/100ml。系统运行稳定,抗冲击负荷能力较强,投资和运行费用仅是常规二级处理的1/2—1/5。本文还研究了该系统对污水中主要污染物的去除机理和反应动力学。对工程的设计参数和技术参数进行了优化筛选,建立了湿地生态模式。

The examplary project under study possessed a capacity for treating 500m3 of municipal and industrial waste water a day.The study demostrated that the average removal rates for BOD5, SS, total nitrogen and coliform could reach 85.8%, 93.8%, 64.6% and 99.9% respectively, at a hydrolic loading me of 5cm/d. The average effluent concentration of BOD5, SS, total nitrogen and coliform were 17.8 mg/L, 17.0mg/L, 5.1 mg/L and<8.1/100ml, respectively. The total operation cost of this system accounted for only 1/5-1/2 of the cost of conventional sewage treatment processes. Studies on the mechanism and kinetic of the reactions involved in the process were also carried out. The design and technique parameters of the project were sereened and optimized and a wetland ecological model was built.