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SBR工艺污水生物脱氮过程中N2O的释放特征

刘国华 庞毓旻 齐鲁 王洪臣

刘国华, 庞毓旻, 齐鲁, 王洪臣. SBR工艺污水生物脱氮过程中N2O的释放特征[J]. 环境工程, 2020, 38(7): 51-57. doi: 10.13205/j.hjgc.202007008
引用本文: 刘国华, 庞毓旻, 齐鲁, 王洪臣. SBR工艺污水生物脱氮过程中N2O的释放特征[J]. 环境工程, 2020, 38(7): 51-57. doi: 10.13205/j.hjgc.202007008
LIU Guo-hua, PANG Yu-min, QI Lu, WANG Hong-chen. N2O EMISSION CHARACTERISTICS DURING BIOLOGICAL NITROGEN REMOVAL FROM WASTEWATER IN A SBR SYSTEM[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(7): 51-57. doi: 10.13205/j.hjgc.202007008
Citation: LIU Guo-hua, PANG Yu-min, QI Lu, WANG Hong-chen. N2O EMISSION CHARACTERISTICS DURING BIOLOGICAL NITROGEN REMOVAL FROM WASTEWATER IN A SBR SYSTEM[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(7): 51-57. doi: 10.13205/j.hjgc.202007008

SBR工艺污水生物脱氮过程中N2O的释放特征

doi: 10.13205/j.hjgc.202007008
基金项目: 

中国人民大学教师教学发展改革项目(A类)。

详细信息
    作者简介:

    刘国华(1976-),男,副教授,水污染控制。lgh@ruc.edu.cn

    通讯作者:

    王洪臣,教授。whc@ruc.edu.cn

N2O EMISSION CHARACTERISTICS DURING BIOLOGICAL NITROGEN REMOVAL FROM WASTEWATER IN A SBR SYSTEM

  • 摘要: N2O是一种可以导致严重全球变暖的主要温室气体,污水的生物除氮处理过程被认为是N2O释放的重要来源。探究了缺氧-好氧(A/O)模式下SBR系统中N2O的释放特征和主要来源。结果表明:N2O的释放主要发生在SBR系统的好氧阶段,其最大释放速率达到2.02 μg/(min·g),累积释放量为8.2 mg,好氧运行120 min时,测得NO2--N的累积浓度达到了最高值7.5 mg/L,NO2--N的积累和N2O的释放呈正相关性。细菌群落分析发现,A/O-SBR系统好氧阶段的一些优势菌被鉴定为黄杆菌(Flavobacteria),它们中的部分种群具有好氧反硝化的作用,然而NO2--N累积会抑制该类细菌的亚硝酸还原酶(Nos)活性,进而使N2O进一步还原为N2的途径受阻而释放N2O。因此,在污水生物处理过程中,应减少或避免NO2--N的积累。
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  • 收稿日期:  2020-04-05

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