WANG Zhuo-yi,ZHANG Hong-tao,LI Dong-ling,et al.Application of A2/O and MBR Combined Process for Wastewater Treatment in Cold Area[J].China Water & Wastewater,2020,36(18 18):70-74.
Application of A2/O and MBR Combined Process for Wastewater Treatment in Cold Area
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
18 18
Page:
70-74
Column:
Date of publication:
2020-09-17
- Keywords:
- cold area; A2/O+MBR; three-stage reverse-flow
- Abstract:
- Taking the project of Jinshan wastewater treatment plant in Karaqin Banner, Chifeng City, Inner Mongolia as an example, the applicability of A2/O and MBR combined process in cold area and the design experience were discussed. The recent treatment capacity of Jinshan wastewater treatment plant was 20 000 m3/d. Three-stage reverse-flow A2/O and MBR combined process was adopted. The design water temperature in winter was 9 ℃, the thermal insulation design for cold areas was adopted. The frame enclosure structure or color steel plate were adopted to keep warm in all the buildings and structures. The results showed that when the sludge concentration was kept high (the sludge concentration in anoxic tank was controlled at about 8 g/L) and the aeration volume was increased properly (the DO at the end of aerobic tank was controlled at more than 4 mg/L), the effluent water quality could reach and superior to the first level A standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002).
Last Update:
2020-09-17