摘要
通过对西安市第四污水处理厂A^2/O工艺中生物反应池(厌氧池、缺氧池、好氧池)以及二沉池中氮的组分及污泥硝化活性的测定,评价A^2/O工艺的脱氮性能。结果表明,二沉池作为A^2/O系统的分离单元,对总氮去除的贡献率高达13%^60%,脱氮机理主要是内源反硝化;污泥浓度对TN去除效果具有重要影响,当污泥浓度较高时,TN平均去除率为89%,当污泥浓度较低时,TN平均去除率为69%。二沉池中的内源反硝化脱氮可为我国城市污水处理厂高效生物脱氮工艺的设计、运行及提质增效提供参考。
In order to evaluate the denitrification performance of A^2/O process in Xi’an Fourth Wastewater Treatment Plant,the nitrogen components and nitrification activity in the biological reaction tanks(anaerobic tank,anoxic tank and aerobic tank)and secondary sedimentation tank were determined.As the separation unit of the A^2/O process,the secondary sedimentation tank contributed as high as 13%-60%of the TN removal,and the removal mechanism was endogenous denitrification.Sludge concentration had an important influence on the TN removal.When the sludge concentration was high,the average TN removal rate was 89%;when the sludge concentration was low,the average TN removal rate was 69%.The endogenous denitrification process in the secondary sedimentation tank can provide an important reference for design and operation of efficient biological nitrogen removal process and the improvement of effluent quality and treatment efficiency of WWTPs.
作者
田敏
崔涛
吕恺
赵文钊
彭党聪
TIAN Min;CUI Tao;Lü Kai;ZHAO Wen-zhao;PENG Dang-cong(Xi'an Sewage Treatment Co.Ltd.,Xi'an 710024,China;School of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2020年第13期1-6,共6页
China Water & Wastewater
基金
陕西省重点研发计划项目(2019ZDLSF06-05)。
关键词
A^2/O工艺
生物脱氮
二沉池
内源反硝化
A^2/O process
biological nitrogen removal
secondary sedimentation tank
endogenous denitrification
