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交替好氧缺氧短程硝化及其特性

Keywords: 交替好氧缺氧,短程硝化,实际生活污水,比氨氧化速率

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Abstract:

为了完善交替好氧缺氧短程硝化研究,以低ρ(COD)/ρ(TN)实际生活污水为研究对象,采用2组SBR反应器,考察了交替好氧缺氧短程硝化的实现及其特性.结果表明:在温度(24±2)℃、污泥龄为35d且不限制溶解氧的条件下,以不同的好氧缺氧时间比运行的2组反应器均实现了稳定的短程硝化,出水的亚硝酸盐积累率达90%以上,氨氮质量浓度接近0mg/L,硝酸盐质量浓度在2mg/L以下;以交替好氧缺氧模式运行200d后,2组反应器比氨氧化速率分别是普通好氧缺氧模式的2倍和1郾8倍,在不影响出水水质的情况下,显著减少了曝气时间,降低了曝气能耗;交替模式运行的反应器污染物去除效果良好,氨氮去除率达100%,COD去除率在80%左右,TN去除率高于普通好氧缺氧模式的去除率,达70%.

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