BAI Yu-hua,ZHANG Xin-yu,HUANG Zheng-xin,et al.AAOA-MBR Enhanced Denitrification Process for Upgrading and Reconstruction of a Wastewater Treatment Plant in Neijiang[J].China Water & Wastewater,2020,36(24 24):87-91.
AAOA-MBR Enhanced Denitrification Process for Upgrading and Reconstruction of a Wastewater Treatment Plant in Neijiang
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
24 24
Page:
87-91
Column:
Date of publication:
2020-12-17
- Abstract:
- The total treatment capacity of a wastewater treatment plant in Neijiang City, Sichuan Province is 1.8×104 m3/d, and the treatment capacity of the first phase project is 0.9×104 m3/d. The AAO-MBR was used as the original wastewater treatment process, and the effluent quality implemented the first class A standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). The treatment capacity of the upgrading project remains as same as the original project, and the effluent quality should meet the discharge standard of the municipal wastewater treatment plant in the Discharge Standard of Water Pollutants in Minjiang and Tuojiang River Basins of Sichuan Province (DB 51/2311-2016). The reduction of total nitrogen to 10 mg/L was the key technical difficulty. Therefore, the AAOA-MBR enhanced denitrification process was adopted to achieve the effective removal of total nitrogen without adding land or stopping production, mainly through the transformation of the AAO biological unit to expand the volume of the anoxic zone, addition of new carbon source dosing system, and adoption of new precise aeration system. Since the project was completed and put into operation, it has been in good operating condition, and the effluent quality has reached the design standard.
Last Update:
2020-12-17