LIYi-huan,DONGYu-ming,GAOFang.Application of AAOA-MBR Process in Sewage Treatment Plant Upgrading and Expansion[J].China Water & Wastewater,2022,38(18):114-119.
Application of AAOA-MBR Process in Sewage Treatment Plant Upgrading and Expansion
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第18期
Page:
114-119
Column:
Date of publication:
2022-09-17
- Keywords:
- AAOA-MBR process; sludge inoculation; commissioning operation; nitrogen and phosphorus removal
- Abstract:
- The AAOA-MBR process is used in the fifth phase upgrading and expansion project of a municipal sewage treatment plant in Wuxi. The process flow, main structures and equipment parameters are introduced. The sludge inoculation method, operation experience and effluent data during commissioning are summarized. An appropriate membrane cleaning scheme is proposed, and its effect is analyzed. The influent and effluent COD, TP, ammonia nitrogen and TN test data during 5 months of stable operation are analyzed to evaluate the sewage treatment effect. The results show that the AAOA-MBR process has a good nitrogen and phosphorus removal effect. The average effluent COD, TP, ammonia nitrogen and TN are 15.6 mg/L, 0.128 mg/L, 0.472 mg/L, 8.69 mg/L, respectively, and the corresponding removal rates are 92.9%, 97.3%, 97.8%, and 73.1%, respectively, which are better than the design standard. The nitrification liquid reflux ratio of the biochemical pond is controlled at 160%-200%, the sludge reflux ratio of the membrane tank is controlled at 300%-500%, and the DO at the end of the biochemical tank is controlled at 2-4 mg/L. The dosage of phosphorus removal agent is 2.0-2.5 t/d, which can obtain good sewage treatment effect.
Last Update:
2022-09-17