摘要
反硝化滤池可直接应用于污水二级生化处理,也可应用于二沉池后作为深度处理单元,分为下向流和上向流两种池型。下向流滤池采用滤砖进行布水布气,出水浊度稳定;上向流滤池滤速高,处理效果优。通过调研发现下向流反硝化深床滤池中Denite滤池应用较多,处理规模较大;上向流反硝化滤池中生物陶粒滤料设备投资较低,而轻质滤料滤池运行费用较低。下向流反硝化深床滤池适用于二沉池出水TN不达标,后续需要进一步脱氮的情况;而上向流反硝化滤池可应用于二级生化处理,也可应用于二沉池后作为深度处理单元。工程设计时需结合地质条件、水质要求、运行管理等因素合理选择池型结构,并指出上向流陶粒反硝化滤池可作为今后设计选型时的一种优选工艺。
The denitrification filter can be directly applied to the secondary biochemical treatment of wastewater,and can also be used as the advanced treatment unit after the secondary sedimentation tank.The denitrification filter includes down-flow and up-flow types.The down-flow filter uses blocks for influent and air distribution,and the effluent turbidity is stable.The up-flow filter has the characteristics of high filtering velocity and treatment efficiency.The survey showed that the Denite filter is widely used in down-flow denitrification deep bed filter,and the treatment scale is large.The investment of the up-flow ceramsite filter is low,and the operating cost of the light filtering material is relatively low.The down-flow denitrification deep bed filter can be used in the process following the secondary sedimentation when the TN couldnot meet the effluent standards and further denitrification is needed.The up-flow denitrification filter can be used both in the secondary biochemical treatment and the advanced treatment after the secondary sedimentation tank.The geological conditions,the water quality requirement,operation,etc.,need to be considered in the design of the filter.It is considered that the up-flow ceramsite denitrification filter can be the optimization type in the future.
作者
栗文明
高敏
周军
孙蓉
LI Wen-ming;GAO Min;ZHOU Jun;SUN Rong(Jiangsu Key Laboratory of Environmental Engineering,Jiangsu Provincial Academy of Environmental Science,Nanjing 210036,China;Jiangsu Provincial Academy of Environmental Science Co.Ltd.,Nanjing 210036,China;Wuhai City Construction Investment Group Co.Ltd.,Wuhai 016000,China;Townwater Municipal Engineering Design Co.Ltd.,Nanjing 210019,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2020年第22期100-105,共6页
China Water & Wastewater
基金
江苏省环境工程重点实验室课题(ZX2017001)。
关键词
反硝化滤池
上向流
下向流
上向流陶粒反硝化滤池
下向流反硝化深床滤池
denitrification filter
up-flow
down-flow
up-flow ceramsite denitrification filter
down-flow denitrification deep bed filter
