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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

Keywords: 水渣,免烧,曝气生物滤池,生活污水

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Abstract:

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150mm,滤料层高为1500mm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=167.58mg/L、浊度=34.60NTU、ρ(NH4+-N)=36.45mg/L时,相应的出水指标为ρCODcr=37.73mg/L、浊度=7.57NTU、ρ(NH4+-N)=5.39mg/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.

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