WangDong,LiaoJing,ZhangBohong.Pilot Scale Test of Enhanced Nitrogen Removal by Side-stream Hydrolysis/ Two-stage AO Coupled MABR Process[J].China Water & Wastewater,2026,42(15):15-20.
Pilot Scale Test of Enhanced Nitrogen Removal by Side-stream Hydrolysis/ Two-stage AO Coupled MABR Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第42卷
Number:
第15期
Page:
15-20
Column:
Date of publication:
2026-08-01
- Abstract:
- In order to develop an energy-saving and low-consumption biological treatment process, a pilot-scale study on the side-stream hydrolysis/two-stage AO coupled MABR process was carried out in a municipal wastewater treatment plant in a southern city of China. The biological denitrification effect and performance of MABR process were analyzed in detail. The results showed that when the gas supply of MABR was 4.4 L/(m2·h), the total nitrogen concentration in the effluent of the pilot system could remain stable below 10 mg/L, while the average value reached below 5 mg/L. The MABR achieved an average nitrogen removal efficiency of about 23.9%, a unit membrane area total nitrogen removal load of 2.7 g/(m2·d), and a unit membrane area ammonia nitrogen removal load of 2.8 g/(m2·d). The pilot system demonstrated buffering performance against fluctuations in influent ammonia nitrogen concentration. Based on the dissolution and diffusion process theory of oxygen on membrane materials and the characteristics of MABR reactors, it is proposed that the reactor should be placed in an area with high nitrogen concentration in engineering applications to maintain a high nitrogen removal efficiency.
Last Update:
2026-08-01