化工学报2026，Vol.77Issue(2)：869-879,11.DOI:10.11949/0438-1157.20250827
MABR中泥-膜复合系统的协同脱氮机制与低碳运行特性研究
Study on the synergistic nitrogen removal mechanisms between biofilms and activated sludge and the low-carbon operational characteristics of MABR
摘要
Abstract
In recent years,the membrane aerated biofilm reactor(MABR)has increasingly become a key development direction in urban wastewater treatment technology due to its high oxygen utilization efficiency and low operational energy consumption.Studies have shown that the composite system of biofilm and activated sludge in MABRs can significantly improve biological denitrification efficiency,but the synergistic mechanism of microbial communities among different sludge morphologies remains unclear.This study investigated the feasibility of initiating a synchronous nitrification and denitrification(SND)process in MABR for treating simulated municipal wastewater through coordinated regulation of influent loading and nitrogen composition.The reactor performance,biofilm growth dynamics,and functional structure of the microbial community were systematically analyzed.Results indicated that the SND function was successfully established after 20 d of operation under an influent carbon to nitrogen mass ratio(COD/TN)of 5.When the influent nitrogen loading rate per unit membrane area was increased to 3.59 g N·(m2·d)-1,the removal efficiencies of COD and TN reached 89.07%±0.57%and 88.37%±0.36%,respectively.Furthermore,the nitrogen removal loading rate per unit membrane area in the MABR was significantly higher than the average value reported in previous studies[1.89 g N·(m2·d)-1].High-throughput sequencing and functional gene analysis revealed that under high-load conditions,ammonia-oxidizing bacteria(e.g.,Nitrosomonas),nitrite-oxidizing bacteria(e.g.,Nitrospira),and denitrifying bacteria(e.g.,Flavobacterium)were simultaneously enriched in the biofilm,whereas the suspended sludge was predominantly composed of heterotrophic bacteria.The calculation results demonstrated that the operational energy consumption and whole-process carbon emission intensity of the MABR system per cubic meter of wastewater treated were 0.18 kW·h·m-3 and 0.27 kg CO2 eq·m-3,respectively,which are considerably lower than those associated with the conventional activated sludge method.These findings indicate that MABR offers both high treatment efficiency and low-carbon operation,highlighting its promising potential for widespread application and promotion.关键词
膜曝气生物膜反应器/市政污水/泥-膜复合系统/同步硝化反硝化/低碳运行Key words
membrane aeration biofilm reactor/municipal wastewater/biofilm-activated sludge composite system/simultaneous nitrification and denitrification/low-carbon operation分类
资源环境引用本文复制引用
洪锦波,陆美杰,胡洋,袁隆昊,刘锋,钱飞跃..MABR中泥-膜复合系统的协同脱氮机制与低碳运行特性研究[J].化工学报,2026,77(2):869-879,11.基金项目
江苏省自然科学基金项目(BK20211339) （BK20211339）
江苏省科技副总选派项目(FZ20240796) （FZ20240796）
