膜科学与技术

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Research on the performance optimization and stability of
PG/PEI co-deposition modified hollow fiber aeration membrane
facilitated by sodium periodate

Authors： LI Yixin, ZHOU Junhao, LIU Ziqiang, WU Qiang, WANG Xuan, LYU Xiaolong, ZHANG Mengmeng, HU Haonan

Units： State Key Laboratory of Advanced Separation Membranes Materials, School of Materials Science and Engineering, Institute of Biochemical Engineering, Tiangong University, Tianjin 300387,China

KeyWords： membrane aerated biofilm reactor; hydrophobic membrane; pyrogallol; polyethyleneimine; co-deposition; sodium periodate

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2025,45(3):170-178

Abstract：

The membrane aerated biofilm reactor (MABR) demonstrates high efficiency, cost-effectiveness, and environmental friendliness in wastewater treatment. As the core component of MABR systems, membrane materials require superior oxygen transfer performance and stability. To address the limitations of hydrophobic polyvinylidene fluoride (PVDF) microporous membranes in oxygen transfer efficiency and stability in existing MABR research, this study employed a surface co-deposition modification method using pyrogallol (PG) and polyethyleneimine (PEI) on self-made hydrophobic PVDF microporous membranes, with the introduction of sodium periodate (SP) as an oxidant. Results revealed that the modified membrane exhibited enhanced hydrophilicity compared to the original membrane, with the water contact angle decreasing from 89.7° to 52.5°, bubble point pressure increasing from 8 kPa to 66 kPa, and oxygen transfer coefficient rising from 0.76×10-2 /min to 1.47×10-2 /min (a 1.93-fold improvement), indicating significantly enhanced oxygen transfer performance. Furthermore, the addition of SP substantially reduced co-deposition time and improved membrane stability. Under ultrasonic treatment and in strong acid, neutral, strong alkaline, and high-salt solutions, the oxygen transfer performance decay rates of modified membranes without SP were 14.9%, 13.0%, 3.2%, 26.0%, and 24.7%, respectively. With SP addition, these decay rates decreased to 11.6%, 2.0%, 0.7%, 16.3%, and 3.4%, respectively, demonstrating improved stability across all conditions, with particularly superior performance in high-salt environments.

Funds：

国家自然科学基金项目（51978466）；天津市科技计划项目（21ZYJDJC00050）

AuthorIntro：

李一心（2000-），男，甘肃庆阳人，从事疏水性PVDF膜表面改性及MABR应用研究

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