为了研究短程硝化反硝化工艺过程中产生的N2 O,采用控制序批式活性污泥法运行中的氨氧化阶段的pH值为8~8.3,DO浓度小于1.5 mg·L-1,反硝化阶段停止曝气的方法,成功启动了短程硝化反硝化反应器.并且在稳定运行过程中,对反应周期内N2 O产生量进行了测定分析.结果表明:N2 O主要产生在氨氧化阶段,且随着NO-2-N的积累,产量增大;反硝化阶段产生的N2 O量较少.要控制系统产生的N2 O,可以通过在氨氧化阶段投加能抑制NH2 OH转化为N2 O酶活性的物质和严格控制反硝化过程中的DO来实现.%In order to study N2 O production in the process of shortcut nitrification and denitrification, the SBR reactor was launched successfully by controlling the pH ranging from 8 to 8.3 and DO less than 1 .5 mg·L- 1 at the stage of ammonia oxidation,and by stopping aeration in the denitrification stage.N2 O production was analyzed in the stable operation.The results show that N2 O is produced mainly at the ammonia oxidation stage,increasing with the accumulation of NO-2 -N,and that the production of N2 O is small in the denitrification stage.The amount of N2 O is controlled by adding some material which can inhibit NH2 OH from converting into the enzyme activity of N2 O at the ammonia oxidation stage and by controlling DO strictly at the denitrification stage.
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