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自热式高温好氧消化工艺的氧化还原电位研究

程洁红 周全法 朱南文

程洁红, 周全法, 朱南文. 自热式高温好氧消化工艺的氧化还原电位研究[J]. 环境科学研究, 2009, 22(4): 484-489.
引用本文: 程洁红, 周全法, 朱南文. 自热式高温好氧消化工艺的氧化还原电位研究[J]. 环境科学研究, 2009, 22(4): 484-489.
CHENG Jie-hong, ZHOU Quan-fa, ZHU Nan-wen. Study of Oxidation-Reduction Potential ORP on Autothermal Thermophilic Aerobic Digestion Process[J]. Research of Environmental Sciences, 2009, 22(4): 484-489.
Citation: CHENG Jie-hong, ZHOU Quan-fa, ZHU Nan-wen. Study of Oxidation-Reduction Potential ORP on Autothermal Thermophilic Aerobic Digestion Process[J]. Research of Environmental Sciences, 2009, 22(4): 484-489.

自热式高温好氧消化工艺的氧化还原电位研究

基金项目: 国家“十一五”科技支撑计划项目(2008BAC46B04);江苏省科技厅自然基金项目(BK2008547);江苏省高校自然科学基础研究面上项目(07KJB610027);江苏省环境保护厅项目(2008020);常州市科技型中小企业技术创新基金项目(CN2008055)

Study of Oxidation-Reduction Potential ORP on Autothermal Thermophilic Aerobic Digestion Process

  • 摘要: 采用自热式高温好氧消化(ATAD)中试工艺系统,通过间歇式运行,改变进泥初始ρ(VSS)和曝气强度,考察了系统中氧化还原电位(ORP)的变化情况.对进泥初始ρ(VSS)为45.4和34.2 g/L的曝气强度恒定在1.0 m3/h,搅拌转速为95r/min,停留时间为25 d;初始ρ(VSS)为40.7 g/L污泥的曝气强度在0.4~1.0 m3/h间由大到小进行调节,搅拌转速为95 r/min,停留时间为44 d.结果表明,初始ρ(VSS)与曝气强度对ORP有影响,当曝气强度充足时,ORP呈先下降再回升趋势,最终ORP能达到0 mV以上.对于pH的变化,初始ρ(VSS)为45.4和34.2 g/L的污泥规律相似,均呈先上升后下降趋势,初始ρ(VSS)为34.2 g/L的污泥pH从开始的6.01上升到8.11,然后下降到5.60~6.03.但初始ρ(VSS)为40.7 g/L的污泥pH的变化规律有所不同,pH一直呈上升趋势,从开始的7.33到最终的9.16.表明由于溶胞作用,系统中ρ(总氮),ρ(氨氮),ρ(总磷)较高,pH上升,若曝气强度充足,pH随后下降,ORP回升;若曝气强度较低,pH则一直呈上升趋势,ORP则处于较低值.因此ORP与进泥初始ρ(VSS),曝气强度,反应温度,ρ(氨氮)和pH等因素有关.从ORP的测试结果看,ATAD系统处于厌氧到微好氧之间的状态.

     

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出版历程
  • 收稿日期:  2008-08-18
  • 修回日期:  2008-09-25
  • 刊出日期:  2009-04-25

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