六箱一体化活性污泥工艺对脱氮除磷处理的强化
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摘要
通过调整进水碳氮比(C/N)和进水端厌氧池和缺氧池的进水流量配比,重点考察了六箱一体化活性污泥工艺脱氮除磷效果。结果表明:在试验条件下,C/N的提高可增强脱氮除磷效果,C/N比值为4时,碳源明显不足,出水TN和IP的质量浓度分别为15.52mg/L和1.02mg/L;C/N比值增加至5时,TN出水效果较好,质量浓度为12.87mg/L,而出水TP的质量浓度仍然在0.5~0.6mg/L左右;当C/N比值≥6时,出水氮磷浓度均能达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)一级A标准。控制C/N比值为5,优化工艺进水碳源分配可以提高碳源利用率,当厌氧池和缺氧池进水流量比为2时,出水TN质量浓度保持在13.5mg/L以下,出水TP质量浓度降低至0.36mg/L,整体出水水质优于GB 18918一2002一级A标准,强化了脱氮除磷效果。
The effect of nitrogen and phosphorus removal of STIASP is investigated by regulating C/N radio in influent and distribution ratio of influent in the anaerobic and anoxic tanks.Results indicate that there is a positive correlation between C/N radio and removal efficiency of nitrogen and phosphorus under experimental conditions.The concentrations of TN and TP in the effluent are 15.52 mg/L and 1.02 mg/L when C/N radio is 4,which carbon source is obviously insufficient.By adding C/N radio to 5 concentrations of TN is decreased to 12.87 mg/L while the concentrations of TP in the effluent is still 0.5-0.6 mg/L.When the C/N radio is higher than 7,the effluent of the system can stably meet the first grade A standards of Urban Sewage Disposal Plant Contamination Integrated Discharge Standard.Utilization efficiency of carbon source can be improved by adjusting C/N radio to 5 and optimizing influent flow rate distribution ratio.The quality of effluent water is better than Standard A of the first class in GB 18918—2002,which the concentration of TN and TP in the effluent are lower than 13.5 mg/L and 0.36 mg/L.Effect of nitrogen and phosphorus removal would be strength when the influent distribution ratio is 2 in anaerobic and anoxic tanks.
The effect of nitrogen and phosphorus removal of STIASP is investigated by regulating C/N radio in influent and distribution ratio of influent in the anaerobic and anoxic tanks.Results indicate that there is a positive correlation between C/N radio and removal efficiency of nitrogen and phosphorus under experimental conditions.The concentrations of TN and TP in the effluent are 15.52 mg/L and 1.02 mg/L when C/N radio is 4,which carbon source is obviously insufficient.By adding C/N radio to 5 concentrations of TN is decreased to 12.87 mg/L while the concentrations of TP in the effluent is still 0.5-0.6 mg/L.When the C/N radio is higher than 7,the effluent of the system can stably meet the first grade A standards of Urban Sewage Disposal Plant Contamination Integrated Discharge Standard.Utilization efficiency of carbon source can be improved by adjusting C/N radio to 5 and optimizing influent flow rate distribution ratio.The quality of effluent water is better than Standard A of the first class in GB 18918—2002,which the concentration of TN and TP in the effluent are lower than 13.5 mg/L and 0.36 mg/L.Effect of nitrogen and phosphorus removal would be strength when the influent distribution ratio is 2 in anaerobic and anoxic tanks.
引文
[1]徐洪斌.多点交替进水五箱一体化活性污泥法脱氮除磷工艺研究[D].南京:东南大学,2005.
[2]徐春晖.五箱一体化活性污泥法生活污水除磷脱氮技术[D].南京:东南大学,2004.
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[7]Her Jiunn-Jye,Huang Ju-Sheng.Influences of carbon source and ratio on nitrate/nitrate denitrification and car-bon breakthrough[J].Bioresource Technology,1995,54(1):45-51.
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[9]Kuba T,van Loosdrecht M C M,Heijnen J J.Phosphorus and nitrogen removal with minimal COD requirement by integration of denitrifying dephosphatation and nitrification in a two-sludge system[J].Water Research,1996,30(7):1702-1710.
[10]侯红娟,王洪洋,周琪.进水COD浓度及C/N值对脱氮效果的影响[J].中国给水排水,2005,21(12):19-23.
[11]Olsson G,Nielsen M,Yuan Z,et al.Instrumentation,Control and Automation in Wastewater Systems[M].London:IWA Publishing,2005.
[12]国家环境保护总局.水和废水监测分析方法[J].北京:中国环境科学出版社,2002.
[2]徐春晖.五箱一体化活性污泥法生活污水除磷脱氮技术[D].南京:东南大学,2004.
[3]乔红杰.五箱一体化活性污泥组合工艺除磷脱氮研究[D].南京:东南大学,2005.
[4]Janssen P M.Operating experience on two full-scale plants,Retrofitted for biological phosphorus removal nutrient removal from wastewaters[M].Pennsyl vania:Technomic Publishing Company,Inc,1994.
[5]Andrew J S,David J.Enhanced biological phosphorus removal from wastewater by biomass with different phosphorus contents,part I:Experimental results and comparison with metabolic models[J].Water Environment Research.2003,75(6):485-498.
[6]王翠,章北平,杨高华.碳氮比对A-O-N工艺脱氮效果的影响[J].工业用水与废水,2008,39(4):32-35.
[7]Her Jiunn-Jye,Huang Ju-Sheng.Influences of carbon source and ratio on nitrate/nitrate denitrification and car-bon breakthrough[J].Bioresource Technology,1995,54(1):45-51.
[8]Gomez M A,G onzd lez-Lopez J,Hontoria-Garc E.Influ-ence of carbon source on nitrate removalof contaminated groundwater in a denitrifying submerged filter[J].Journal of Hazardous Materials,2000,80(1-3):69-80.
[9]Kuba T,van Loosdrecht M C M,Heijnen J J.Phosphorus and nitrogen removal with minimal COD requirement by integration of denitrifying dephosphatation and nitrification in a two-sludge system[J].Water Research,1996,30(7):1702-1710.
[10]侯红娟,王洪洋,周琪.进水COD浓度及C/N值对脱氮效果的影响[J].中国给水排水,2005,21(12):19-23.
[11]Olsson G,Nielsen M,Yuan Z,et al.Instrumentation,Control and Automation in Wastewater Systems[M].London:IWA Publishing,2005.
[12]国家环境保护总局.水和废水监测分析方法[J].北京:中国环境科学出版社,2002.