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污泥浓度对双重后置反硝化工艺脱氮除磷的影响

邓仁健 张金松 曲志军

邓仁健, 张金松, 曲志军. 污泥浓度对双重后置反硝化工艺脱氮除磷的影响[J]. 环境科学研究, 2014, 27(7): 797-803.
引用本文: 邓仁健, 张金松, 曲志军. 污泥浓度对双重后置反硝化工艺脱氮除磷的影响[J]. 环境科学研究, 2014, 27(7): 797-803.
DENG Ren-jian, ZHANG Jin-song, QU Zhi-jun. Characteristics of Nitrogen and Phosphorus Removal in Multiple Post-Denitrification Processes with Different Sludge Concentrations[J]. Research of Environmental Sciences, 2014, 27(7): 797-803.
Citation: DENG Ren-jian, ZHANG Jin-song, QU Zhi-jun. Characteristics of Nitrogen and Phosphorus Removal in Multiple Post-Denitrification Processes with Different Sludge Concentrations[J]. Research of Environmental Sciences, 2014, 27(7): 797-803.

污泥浓度对双重后置反硝化工艺脱氮除磷的影响

基金项目: 国家高技术研究发展计划(863)项目(2009AA064704);深圳水务(集团)有限公司科研立项课题

Characteristics of Nitrogen and Phosphorus Removal in Multiple Post-Denitrification Processes with Different Sludge Concentrations

  • 摘要: 利用城市实际污水考察了ρ(MLSS)在2 400、3 350、4 300和5 250 mg/L 4种工况下SBR反应器(厌氧/好氧/缺氧/再好氧/沉淀/排水/预缺氧运行模式)的脱氮除磷效果,并分析了反应器单个周期内有机物、氮和磷的转化过程及污泥产量. 结果表明:ρ(MLSS)由2 400 mg/L升至5 250 mg/L时,系统TN去除率由52.5%升至66.6%;后续缺氧及预缺氧工序的脱氮比例(该工序TN去除量占系统TN总去除量的比例)由12.7%增至23.1%;ρ(MLSS)为4 300 mg/L时系统TP去除率(75.6%)达到最大. 后续缺氧及预缺氧工序中,ρ(MLSS)与内源反硝化速率呈正相关(R2=0.703 7);提高ρ(MLSS)可使PAOs(聚磷菌)在下一个周期内获得更多的碳源,使厌氧释磷量由1.62 mg/L升至9.10 mg/L,但PAOs吸磷动力会减弱,对除磷不利. 在后置反硝化、污泥衰减、能量解偶联等减量机制共同作用下,ρ(MLSS)为4 300 mg/L时系统污泥减量可提高24.4%. 从脱氮除磷及污泥减量效果综合考虑,ρ(MLSS)是双重后置反硝化工艺重要的控制参数,在该研究条件下控制在4 300 mg/L最优.

     

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出版历程
  • 收稿日期:  2013-08-16
  • 修回日期:  2013-12-10
  • 刊出日期:  2014-07-25

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