Enhanced nitrogen and phosphorus removal in gravity driven membrane bioreactor: Performance and mechanism

被引：0
|
作者：
Du, Xing [1 ]
Liang, Zhenhao [1 ]
Yu, Nan [1 ]
Song, Wei [1 ]
Wang, Zhihong [1 ]
Hu, Mingming [2 ]
Yuan, Tugui [3 ]
Shaw, Dario Rangel [4 ]
Saikaly, Pascal E. [4 ]
Zhang, Wenxiang [2 ]
机构：
[1] School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou,510006, China
[2] Research Centre of Ecology & Environment for Coastal Area and Deep Sea, Southern Marine Science and Engineering Guangdong Laboraroty (Guangzhou), China
[3] Beijing University of Civil, Engineering and Architecture, Beijing,100044, China
[4] Water Desalination and Reuse Center (WDRC), King Abdullah University of Science and Technology (KAUST), Thuwal,23955-6900, Saudi Arabia
来源：
Separation and Purification Technology | 2025年 / 362卷
基金：
中国国家自然科学基金;
关键词：
Aerobic bacteria - Biofilms - Biological water treatment - Bioremediation - Coagulation - Denitrification - Nafion membranes - Nitrogen removal - Tanks (containers) - Water filtration;
D O I：
10.1016/j.seppur.2025.131688
中图分类号：
学科分类号：
摘要：
The effective removal of nitrogen and phosphorus is a technical bottleneck in rural wastewater treatment. In this work, Gravity-Driven Membrane Bioreactor (GDMBR) was upgraded by integrating electrocoagulation (EC), aerobic-anaerobic (OA) tanks and ceramic membrane to fabricate EC-OA-GDMBR. This enhancement aimed to improve the long-term and stable removal efficiency of nitrogen and phosphorus in rural wastewater treatment. First, Fe3+ generated from EC facilitated Anammox (Candidatus Brocadia and Candidatus Kuenenia) and Feammox (Pseudomonas, Exiguobacterium, Geobacteria, and Geobacteria) in the anaerobic tank. Denitrification occurred either in the anaerobic tank or in the deep layer of biofilm in the aerobic tank, resulting in a synergy on the nitrogen removal even at low carbon source. Second, EC enhanced the phosphorus removal by combining with PO43- to form insoluble phosphate precipitates. Additionally, the carriers created more attachment areas for microbial growth in the aerobic tank, promoting organic degradation. Accordingly, the EC, biodegradation, Anammox/Feammox and denitrification in EC-OA-GDMBR synergistically improved water purification efficiency, achieving CODCr 3-N © 2025 Elsevier B.V.
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