WU Yun-sheng.Upgrading and Reconstruction Technology of WWTPs Based on “Seven-segment” Biochemical Combined Process[J].China Water & Wastewater,2021,37(18 18):20-24.
Upgrading and Reconstruction Technology of WWTPs Based on “Seven-segment” Biochemical Combined Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
18 18
Page:
20-24
Column:
Date of publication:
2021-09-17
- Keywords:
- upgrading and reconstruction; technical decision; biochemical treatment; “seven-segment” biochemical combined process
- Abstract:
- According to the complicated situation of water inflow and limited land for upgrading, the technical decision-making roadmap for upgrading of WWTPs is made. Its core is the biochemical treatment unit, which is “seven-segment” biochemical combined process in this work. Based on the traditional Bardenpho process, pre-anoxic tank and deoxygenation tank are added to improve the removal efficiency of nitrogen and phosphorus. Meanwhile, the layout of tank type is improved to realize the swtich between traditional A2O and two-stage AO to perform multi-mode operation. Thus, we could solve the problems such as remarkable fluctuation of influent quality, high standard of effluent quality and high concentration of influent pollutant. The engineering case shows that the denitrification rate can reach 74%. Compared with the traditional A2O, the cost of carbon source agent is saved by 0.06 yuan/m3, and the cost of phosphorus removal agent is saved by 0.02 yuan/m3.
Last Update:
2021-09-17