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Simultaneous nitrogen and carbon removal from low-C/N municipal wastewater via membrane aerated biofilm reactor and oxygen transfer performance
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Xing JIANG1, 2, Chun-hai WEI1, 3, *, Zhe YUAN1, Xin-yu ZHAI1, Zhi-hui PAN1, 3, Tao LIU1, 3, Li-qiu ZHANG1, 3, **
China Environmental Science | 2025, 45(8) : 4286 - 4293
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China Environmental Science | 2025, 45(8): 4286-4293
• Water Pollution Control •
Simultaneous nitrogen and carbon removal from low-C/N municipal wastewater via membrane aerated biofilm reactor and oxygen transfer performance
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Xing JIANG1, 2, Chun-hai WEI1, 3, *, Zhe YUAN1, Xin-yu ZHAI1, Zhi-hui PAN1, 3, Tao LIU1, 3, Li-qiu ZHANG1, 3, **
Affiliations
  • 1.School of Civil Engineering and Transportation, Guangzhou University, Guangzhou 510006, China
  • 2.Zhanjiang Economic and Technological Development Zone Agency for Construction Projects Administration, Zhanjiang 52406, China
  • 3.Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou 510006, China
Published: 2025-08-20
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The typical low-C/N municipal wastewater (COD, ammonia, total nitrogen of 258.1, 30.5, 36.8mg/L) in South China was treated by membrane aerated biofilm reactor (MABR) process. By means of synchronously reducing hydraulic retention time (HRT) and increasing aeration pressure, the results showed that effluent COD met the discharge standard of level I class B, and effluent ammonia and total nitrogen met the discharge standard of level I class A at the individual HRT and selected aeration pressure combinations of 24h and 5kPa, 12h and 7kPa, 8h and 8kPa, 6h and 10kPa, 4h and 12kPa. The maximum surface and volume load removal of COD, ammonia nitrogen, total nitrogen achieved 19.2, 2.26, 2.53g/(m2·d) and 1.6, 0.19, 0.21g/(L·d), respectively, which showed significantly better performance of MABR than conventional biofilm and activated sludge processes. Oxygen transfer characterization showed that biofilm significantly enhanced the oxygen transfer rate (19.5~40.6gO2/(m2·d)), oxygen transfer efficiency (30.9%~59.8%) and aeration efficiency (34.2~48.3kgO2/kWh) of the investigated hollow fiber aeration membrane, implying the autonomous respiration of biofilm (i.e., automatically withdrawing the oxygen demand via aeration membrane to match the oxygen consumption caused by the influent load of ammonia nitrogen and COD). Thus, there is a significant potential for reducing pollution, carbon emission, energy consumption and cost for municipal wastewater treatment via MABR coupling intermittent aeration, synchronous coagulation, periodical detachment of excessive thick outer biofilm, adjustment of aeration flow and inlet/outlet pressure of membrane module to match the pollutants load.

MABR  /  low-C/N municipal wastewater  /  simultaneous nitrification and denitrification  /  oxygen transfer rate  /  oxygen transfer efficiency  /  aeration efficiency
江兴, 魏春海, 袁喆, 翟心瑜, 潘志辉, 刘涛, 张立秋. MABR处理低C/N市政污水的除碳脱氮及传氧效能. 中国环境科学, 2025 , 45 (8) : 4286 -4293 .
Xing JIANG, Chun-hai WEI, Zhe YUAN, Xin-yu ZHAI, Zhi-hui PAN, Tao LIU, Li-qiu ZHANG. Simultaneous nitrogen and carbon removal from low-C/N municipal wastewater via membrane aerated biofilm reactor and oxygen transfer performance[J]. China Environmental Science, 2025 , 45 (8) : 4286 -4293 .
Appendix
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Year 2025 volume 45 Issue 8
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  • Receive Date：2024-12-22
  • Online Date：2026-10-08
  • Published：2025-08-20
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  • Received：2024-12-22
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Affiliations
    1.School of Civil Engineering and Transportation, Guangzhou University, Guangzhou 510006, China
    2.Zhanjiang Economic and Technological Development Zone Agency for Construction Projects Administration, Zhanjiang 52406, China
    3.Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou 510006, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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