混凝滤布过滤-缺氧滤池／生物滴滤工艺处理生活污水

Treatment of domestic wastewater by combined processes of coagulation cloth media filtration-anaerobic filter／trickling filter

摘要:

为实现小城镇污水高效、节能、低耗处理,建立混凝滤布过滤-缺氧滤池／生物滴滤污水处理组合工艺．在优选实验装置及材料的基础上,探究各部分工艺最优运行参数. 在研究系统对常规污染物去除的同时,重点分析生物滤池启动过程对氨氮和总氮的去除能力．结果表明:当粉煤灰基混凝剂投加量为1 mL／L时,混凝-滤布过滤对COD_cr的去除率可达54％,对TP的去除率达81％,且具有工作周期长、耗能少等特点;生物滤池在水力负荷为15 L／d、硝化液回流比为150％时运行效果最好,可保证系统出水氨氮、COD_cr、TP、TN均达到GB18918—2002的一级A标准．

Abstract:

In order to treat the small town sewage wastewater with high efficiency, energy saving and low power consumption, a combined coagulation cloth media filtration-anaerobic filter／trickling filter system was established at experimental condition. Via the experimental optimization of equipments and materials, the optimal operation parameters of each part, especially the nitrogen removal ability during the start-up of the trickling filter had been investigated. Experimental results showed that at 1 mL／L fly ash coagulant dosage, 54％ removal of COD_cr and 81％ of TP would be removed by the combined system. The optimal hydraulic loading was 15 L／d and the optimal reflux ratio was 150％, which would guarantee the effluent ammonia, COD_cr, TP reach A standard.