水渣滤料-曝气生物滤池去除生活污水中污染物的效能研究

为解决水渣对环境的污染及综合利用的问题,以水渣为主要原料,添加黏结剂和成孔剂,经混合、成球、养护制成免烧型水渣滤料.在直径为150 mm,滤料层高为1 500 mm的水渣滤料曝气生物滤池(WBAF)中处理生活污水.结果表明,在温度为20～27℃,pH为7.0～8.0,气水比为5∶1,进水ρCODcr=167.58 mg/L、浊度=34.60 NTU、ρ(NH 4+-N)=36.45 mg/L时,相应的出水指标为ρCODcr=37.73 mg/L、浊度=7.57 NTU、ρ(NH 4+-N)=5.39 mg/L,符合国家污水综合排放标准(GB8978—1996)一级标准.氨氮去除效果明显是因为水渣滤料能溶出碱性物质,为硝化反应提供了碱度.

Research on Removal Efficiency of Contamination in Domestic Sewage by Water Quenched Slag Filter Medium Biological Aerated Filter

In order to dipose of the enviromental pollution caused by blast furnace water quenched slag and its comprehensive utilization,water quenched slag was adopted as dominating material mixed with bond and pore-forming agent by commingle,conglobate and conseve to make avoiding-burning water quenchde slag filter medium.A pilot scale Water quenched slag filter medium Biological Aerated Filter(WBAF) of 150mm in diameter and 1500mm in media height was tested to treat domestic Sewage.The results showed that ρCODcr=37.73 mg/L、turbidity =7.57NTU、ρ(NH+4-N) 5.39mg/L when the corresponding influent concentration was 167.58mg/L、34.60NTU 、36.45mg/L,respectively,under the conditions of T=20～27℃,pH=7.0～8.0 and gas/ liquid=5∶1.The quality indexes of the domestic sewage after treatment conform with the national discharge standards.The water quenched slag filter medium has higher ammonia nitrogen removal efficiency that because it can sufficiently supply alkalinity by dissolving alkaline substances.