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以亚硝酸盐为电子受体的反硝化除磷过程中N2O积累的影响因素

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苗志加, 李宁, 高会杰, 赵俊娜, 黄娟, 李再兴. 以亚硝酸盐为电子受体的反硝化除磷过程中N2O积累的影响因素[J]. 环境工程学报, 2016, 10(6): 2807-2812. doi: 10.12030/j.cjee.201501094
引用本文: 苗志加, 李宁, 高会杰, 赵俊娜, 黄娟, 李再兴. 以亚硝酸盐为电子受体的反硝化除磷过程中N2O积累的影响因素[J]. 环境工程学报, 2016, 10(6): 2807-2812. doi: 10.12030/j.cjee.201501094
shu
Miao Zhijia, Li Ning, Gao Huijie, Zhao Junna, Huang Juan, Li Zaixing. Influencing factors of N2O accumulation in process of denitrifying phosphorus removal with nitrite as electron acceptor[J]. Chinese Journal of Environmental Engineering, 2016, 10(6): 2807-2812. doi: 10.12030/j.cjee.201501094
Citation: Miao Zhijia, Li Ning, Gao Huijie, Zhao Junna, Huang Juan, Li Zaixing. Influencing factors of N2O accumulation in process of denitrifying phosphorus removal with nitrite as electron acceptor[J]. Chinese Journal of Environmental Engineering, 2016, 10(6): 2807-2812. doi: 10.12030/j.cjee.201501094
shu

以亚硝酸盐为电子受体的反硝化除磷过程中N2O积累的影响因素

  • 1.

    石家庄经济学院水资源与环境学院, 石家庄 050031

  • 2.

    河北科技大学环境科学与工程学院, 石家庄 050018

  • 3.

    河北省石家庄市环境保护局, 石家庄 050021

  • 基金项目:

    国家科技支撑计划课题资助项目(2013BAJ10B09-3)

    河北省高等学校科学技术研究青年基金资助项目(QN2014037)

    石家庄经济学院博士科研启动基金项目

    河北省自然科学基金青年科学基金项目(E2016403035)

  • 中图分类号: X703

Influencing factors of N2O accumulation in process of denitrifying phosphorus removal with nitrite as electron acceptor

  • 1.

    School of Water Resources and Environment, Shijiazhuang University of Economics, Shijiazhuang 050031, China

  • 2.

    School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China

  • 3.

    Shijiazhuang Environment Protection Agency of Hebei, Shijiazhuang 050021, China

  • Fund Project:

  • 摘要: 接种稳定运行140 d的反硝化除磷污泥,通过批次实验,研究了亚硝态氮投加方式、进水COD浓度和pH对反硝化除磷过程N2O代谢的影响。结果表明,60 mg/L的亚硝态氮均分3次投加与1次投加相比,系统内N2O最大积累量从14.23 mg/L降低为2.90 mg/L,经缺氧吸磷后N2O剩余量由8.20 mg/L降低至0.02 mg/L,表明多次投加亚硝态氮可有效避免N2O的积累。当初始进水COD浓度为150、300和450 mg/L时,经3 h缺氧代谢后出水中N2O剩余量分别为11.70和7.59、4.77 mg/L,较高进水COD浓度可有效降低N2O的产量。不同pH值的实验结果表明,较高pH可促进N2O的代谢,并最终减少N2O的产生量。
    Abstract: In order to investigate the influence of nitrite dosing, influent COD and pH on nitrous oxide (N2O) metabolic characteristics in the process of denitrifying phosphorus removal, batch tests were conducted, each of which was inoculated with DPAOs activated sludge. Results showed that with three doses per round of 60 mg/L of nitrite rather than once, the maximum N2O accumulation decreased from 14.23 mg/L to 2.90 mg/L, the residual N2O decreased from 8.20 mg/L to 0.02 mg/L until over the three hours anoxic phase. This indicates that multiple dosing can effectively eliminate N2O accumulation. When the initial influent COD concentrations were 150, 300 and 450 mg/L, the residual N2O in the effluent remained 11.70, 7.59 and 4.77 mg/L during the three-hour anoxic phase, respectively, which indicates that the higher influent COD concentration can effectively reduce the production of N2O. We also studied the N2O metabolic characteristics at different pH values, the results show that the higher pH is advantageous for the metabolism of N2O and can be used to reduce N2O production in the effluent.
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  • 收稿日期:  2015-03-01
  • 刊出日期:  2016-06-03
苗志加, 李宁, 高会杰, 赵俊娜, 黄娟, 李再兴. 以亚硝酸盐为电子受体的反硝化除磷过程中N2O积累的影响因素[J]. 环境工程学报, 2016, 10(6): 2807-2812. doi: 10.12030/j.cjee.201501094
引用本文: 苗志加, 李宁, 高会杰, 赵俊娜, 黄娟, 李再兴. 以亚硝酸盐为电子受体的反硝化除磷过程中N2O积累的影响因素[J]. 环境工程学报, 2016, 10(6): 2807-2812. doi: 10.12030/j.cjee.201501094
shu
Miao Zhijia, Li Ning, Gao Huijie, Zhao Junna, Huang Juan, Li Zaixing. Influencing factors of N2O accumulation in process of denitrifying phosphorus removal with nitrite as electron acceptor[J]. Chinese Journal of Environmental Engineering, 2016, 10(6): 2807-2812. doi: 10.12030/j.cjee.201501094
Citation: Miao Zhijia, Li Ning, Gao Huijie, Zhao Junna, Huang Juan, Li Zaixing. Influencing factors of N2O accumulation in process of denitrifying phosphorus removal with nitrite as electron acceptor[J]. Chinese Journal of Environmental Engineering, 2016, 10(6): 2807-2812. doi: 10.12030/j.cjee.201501094
shu

以亚硝酸盐为电子受体的反硝化除磷过程中N2O积累的影响因素

  • 1. 石家庄经济学院水资源与环境学院, 石家庄 050031
  • 2. 河北科技大学环境科学与工程学院, 石家庄 050018
  • 3. 河北省石家庄市环境保护局, 石家庄 050021
  • 收稿日期:  2015-03-01
基金项目:

国家科技支撑计划课题资助项目(2013BAJ10B09-3)

河北省高等学校科学技术研究青年基金资助项目(QN2014037)

石家庄经济学院博士科研启动基金项目

河北省自然科学基金青年科学基金项目(E2016403035)

摘要: 接种稳定运行140 d的反硝化除磷污泥,通过批次实验,研究了亚硝态氮投加方式、进水COD浓度和pH对反硝化除磷过程N2O代谢的影响。结果表明,60 mg/L的亚硝态氮均分3次投加与1次投加相比,系统内N2O最大积累量从14.23 mg/L降低为2.90 mg/L,经缺氧吸磷后N2O剩余量由8.20 mg/L降低至0.02 mg/L,表明多次投加亚硝态氮可有效避免N2O的积累。当初始进水COD浓度为150、300和450 mg/L时,经3 h缺氧代谢后出水中N2O剩余量分别为11.70和7.59、4.77 mg/L,较高进水COD浓度可有效降低N2O的产量。不同pH值的实验结果表明,较高pH可促进N2O的代谢,并最终减少N2O的产生量。

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