阶段流入式多级A/O生物脱氮工艺设计及应用

阐述了阶段流入式多级A/O生物脱氮工艺的原理和特点。结合国内外的设计、运行经验,对脱氮率、反应器级数、配水比、各级容积比、污泥回流比等工艺参数的设计计算进行探讨。在此基础上,对该工艺在我国首个应用案例(设计水量2万m3/d,出水达到GB18918-2002一级A标准)的工艺设计进行简要介绍,为该工艺的推广应用提供了依据。

DESIGN AND APPLICATION OF STEP-FEED MULTISTAGE A/O BIOLOGICAL NITROGEN REMOVAL PROCESS

The principle and characteristics of step-feed multistage A /O biological nitrogen removal process were described.Combined with design and operation experiences of domestic and overseas,design and calculation of parameters such as nitrogen removal efficiency,stages of reactor,distribution ratio of feed water,the volumetric ratio of each stage and the sludge reflux ratio were also discussed.On this basis,the design and calculation of parameters of the first project application using this process in China was briefly introduced,the design flow was 20,000m3 /d and the effluent quality could meet A level of first order of GB18918-2002,which provided a basis for the application extension of the process.