中文关键词短程硝化交替模式好氧/缺氧时间比温度物料衡算 英文关键词shortcut nitrificationalternating modeaerobic/anoxic time ratiotemperaturematerial balance

作者	单位	E-mail
刘安迪	兰州交通大学环境与市政工程学院, 兰州 730070	529663036@qq.com
赵凯亮	兰州交通大学环境与市政工程学院, 兰州 730070
刘宏	兰州交通大学环境与市政工程学院, 兰州 730070
黄利	兰州铁道设计院有限公司, 兰州 730000
倪蓉	兰州交通大学环境与市政工程学院, 兰州 730070
陈永志	兰州交通大学环境与市政工程学院, 兰州 730070	476411589@qq.com

中文摘要 试验采用SBR反应器处理低C/N生活污水，在温度为（25±0.5）℃时，分别采用交替缺氧/好氧4次、交替好氧/缺氧5次和交替好氧/缺氧4次，时间比均为30 min∶30 min，NO₂^--N积累率在69、63和58周期分别达到96.79%、98.80%和98.78%；同样温度下，控制好氧/缺氧时间比分别为30 min∶30 min、40 min∶20 min和30 min∶60 min，单周期交替次数为5、3和5时，NO₂^--N积累率于63、73及78周期时达到最大，其分别为98.81%、97.71%和94.64%，对应AOB活性分别为96.30、99.27及102.26，对其进行物料衡算，3种好氧/缺氧时间比下均存在同步硝化反硝化，同步硝化反硝化去除总氮分别为29.89、28.77及29.78 mg·L^-1.调整温度分别为18、25和30℃，在好氧/缺氧时间比为30 min∶30 min时，在第90、64和61周期时NO₂^--N积累率分别为99.58%、99.21%和95.93%，污泥活性（f）达到最大所需时间分别为64、40及48周期，且污泥沉降性能均良好. 英文摘要 Low C/N domestic sewage was treated in a SBR. With an operating temperature of (25±0.5)℃, NO₂^--N accumulation rates reached 96.79%, 98.80%, and 98.78% after 69, 63, and 58 cycles, respectively. In each case, alternating modes of hypoxia/aerobic (four times), aerobic/anoxic (five times), and aerobic/anoxic (four times) were applied, respectively, with an alternating time of 30 min. At the same temperature, when the aerobic/anoxic time ratios were 30 min:30 min, 40 min:20 min, and 30 min:60 min, and the single-cycle alternating times were 5, 3, and 5, respectively, stable NO₂^--N accumulation rates reached 98.81%, 97.71%, and 94.64% after 63, 73, and 78 cycles, respectively. The activity of AOB was 96.30, 99.27, and 102.26, respectively. Simultaneous nitrification and denitrification occurred under the three aerobic/anoxic time ratios. The total amounts of nitrogen removed by synchronous nitrification and denitrification were 29.89, 28.77, and 29.78 mg·L^-1. When temperatures were adjusted to 18, 25, and 30℃, and when the aerobic/anoxic time ratio was 30 min:30 min, the NO₂^--N accumulation rates were 99.58%, 99.21%, and 95.93% after 90, 64, and 61 cycles, respectively. The activity of the sludge (f) peaked when after 64, 40, and 48 cycles, while the sludge-settling performance was good.

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