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不同水质条件下污水管道甲烷排放规律及微生物作用机制

赵刚 蒋明 韦志成 王凤 罗景阳 唐建国

赵刚, 蒋明, 韦志成, 王凤, 罗景阳, 唐建国. 不同水质条件下污水管道甲烷排放规律及微生物作用机制[J]. 环境工程, 2024, 42(4): 22-30. doi: 10.13205/j.hjgc.202404003
引用本文: 赵刚, 蒋明, 韦志成, 王凤, 罗景阳, 唐建国. 不同水质条件下污水管道甲烷排放规律及微生物作用机制[J]. 环境工程, 2024, 42(4): 22-30. doi: 10.13205/j.hjgc.202404003
ZHAO Gang, JIANG Ming, WEI Zhicheng, WANG Feng, LUO Jingyang, TANG Jianguo. IMPACTS OF SEWAGE CONCENTRATION ON METHANE EMISSION AND MICROBIOLOGICAL MECHANISMS IN SEWAGE COLLECTION SYSTEMS[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(4): 22-30. doi: 10.13205/j.hjgc.202404003
Citation: ZHAO Gang, JIANG Ming, WEI Zhicheng, WANG Feng, LUO Jingyang, TANG Jianguo. IMPACTS OF SEWAGE CONCENTRATION ON METHANE EMISSION AND MICROBIOLOGICAL MECHANISMS IN SEWAGE COLLECTION SYSTEMS[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(4): 22-30. doi: 10.13205/j.hjgc.202404003

不同水质条件下污水管道甲烷排放规律及微生物作用机制

doi: 10.13205/j.hjgc.202404003
详细信息
    作者简介:

    赵刚(1990-),男,博士,主要研究方向为水污染控制工程。zhaogang@sucdri.com

    通讯作者:

    蒋明(1979-),男,博士,主要研究方向为城市排水系统提质增效。jiangming@sucdri.com

IMPACTS OF SEWAGE CONCENTRATION ON METHANE EMISSION AND MICROBIOLOGICAL MECHANISMS IN SEWAGE COLLECTION SYSTEMS

  • 摘要: 城市污水管道是甲烷等温室气体的重要潜在来源,影响因素繁多。目前,不同水质条件对管道甲烷产排特性、底物的转化规律和微生物作用机制仍有待进一步解析。通过静态模拟试验探究了污水管道系统中不同污水浓度下(100~700 mg COD/L)挥发性脂肪酸(VFAs)含量及甲烷排放特征。结果表明:管道系统中污水COD浓度越高,VFAs和甲烷产量越高。与低浓度污水(100 mg COD/L)相比,高浓度污水管道系统中(500,700 mg COD/L)VFAs产量增长了2.4,4.1倍,甲烷排放量增加了8.1,21.0倍。机理分析发现,管道系统内高浓度污水有利于水解、酸化和产甲烷等厌氧微生物的富集,并导致与胞外水解(如dacC)、胞内代谢(如yhdR)、脂肪酸生成(如pta)和甲烷生成(ftr、fwd)等相关的功能基因表达的上调,进而提升微生物产甲烷代谢活性。偏最小二乘路径模型(PLS-PM)分析表明:功能微生物群落(λ=0.721)和相关代谢基因的表达(λ=0.640)是影响污水管道甲烷产排的主要因素,而污水COD浓度为次要因子(λ=0.623)。
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出版历程
  • 收稿日期:  2024-02-20
  • 网络出版日期:  2024-06-01

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