Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China; Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, Shanghai 200241, China; Shanghai Institute of Pollution Control and Ecological Security, 1515 North Zhongshan Rd. (No. 2), Shanghai 200092, China; Technology Innovation Center for Land Spatial Eco-restoration in Metropolitan Area, Ministry of Natural Resources, 3663 N. Zhongshan Road, Shanghai 200062, China.
Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China.
Bioresour Technol. 2023 Jun;377:128939. doi: 10.1016/j.biortech.2023.128939. Epub 2023 Mar 21.
Membrane fouling remains a big challenge hindering the wide-application of anaerobic membrane bioreactor (AnMBR) technology. In this study, an electrochemical anaerobic membrane bioreactor (EC-AnMBR) was developed by coupling electrochemical regulation to enhance co-digestion of sewage sludge and food waste and mitigate membrane fouling. The highest methane production (0.12 ± 0.02 L/L/day) and net energy recovery (31.82 kJ/day) were achieved under the optimum conditions of 0.8 V, hydraulic retention time of 10 days and solids retention time of 50 days. Electrochemical regulation accelerated the mineralization of high-molecular-weight organics and reinforced the membrane antifouling ability by inducing electrostatic repulsive force and electrochemical oxidation. Besides, symbiotic relationships among functional microorganisms (Spirochaetes, Methanolinea, etc.) were enhanced, improving the hydrolysis and methanogenesis processes of complex organics and the long-term stability. This study confirms the technical feasibility of EC-AnMBR in treating high-solid biowastes, and provides the fundamental data to support its application in real-world scenarios.
膜污染仍然是阻碍厌氧膜生物反应器（AnMBR）技术广泛应用的一大挑战。在这项研究中，通过将电化学调控与协同处理污水污泥和食物废物以及减轻膜污染相结合，开发了一种电化学厌氧膜生物反应器（EC-AnMBR）。在 0.8V、水力停留时间 10 天和固体停留时间 50 天的最佳条件下，获得了最高的甲烷产量（0.12±0.02L/L/天）和净能量回收（31.82kJ/天）。电化学调控通过诱导静电斥力和电化学氧化加速了高分子有机物的矿化，并增强了膜的抗污染能力。此外，功能微生物（螺旋体、产甲烷菌等）之间的共生关系得到增强，改善了复杂有机物的水解和产甲烷过程及其长期稳定性。本研究证实了 EC-AnMBR 处理高固体生物废物的技术可行性，并为其在实际应用中提供了支持的基础数据。
