SONG Tian-yi.Bardenpho+Biofiltration(DN+CN) Process Used in Wastewater Treatment Plant with Effluent of Quasi-Ⅳ Water Standard[J].China Water & Wastewater,2020,36(22 22):106-109.
Bardenpho+Biofiltration(DN+CN) Process Used in Wastewater Treatment Plant with Effluent of Quasi-Ⅳ Water Standard
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
22 22
Page:
106-109
Column:
Date of publication:
2020-11-17
- Keywords:
- quasi-Ⅳ water quality; multi-stage AO process; denitrification filter (DN); biological aerated filter (CN)
- Abstract:
- The current treatment scale of a county wastewater treatment plant of Sanmenxia City in Henan Province was 3×104 m3/d. The combination process of CAST+flocculation sedimentation+fiber rotary table filtration process was applied, and the effluent quality was required as first class A discharge standard. The project was required to improve the effluent quality to quasi-Ⅳ level. In view of the high concentration of NH3-N and TN in the influent, the transformation focused on the enhancement of denitrification performance, i.e. the biochemical system CAST process was transformed into Bardenpho process(A2O+AO), while the advanced treatment system was added with denitrification filter (DN tank) and biological aerated filter (CN tank). After the reconstruction of the project, the production operation is stable and the effect is good. The effluent quality is better than the quasiⅣ water quality standard.
Last Update:
2020-11-17