LI Wen-ming,GAO Min,ZHOU Jun,et al.Application Survey and Design Points of the Denitrification Filter in Wastewater Treatment Process[J].China Water & Wastewater,2020,36(22 22):100-105.
Application Survey and Design Points of the Denitrification Filter in Wastewater Treatment Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
22 22
Page:
100-105
Column:
Date of publication:
2020-11-17
- Keywords:
- denitrification filter; up-flow; down-flow; up-flow ceramsite denitrification filter; down-flow denitrification deep bed filter
- Abstract:
- 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.
Last Update:
2020-11-17