Department of Civil and Environmental Engineering, Water Technology Center, Hong Kong Branch of Chinese National Engineering Research Centre for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, PR China.
Department of Civil and Environmental Engineering, Water Technology Center, Hong Kong Branch of Chinese National Engineering Research Centre for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, PR China; Center for Environment and Energy Research, Ghent University Global Campus, Incheon, Republic of Korea; Department of Green Chemistry and Technology, Ghent University, Ghent, Belgium.
Bioresour Technol. 2022 Feb;345:126554. doi: 10.1016/j.biortech.2021.126554. Epub 2021 Dec 11.
The membrane aerated biofilm reactor (MABR) is a novel bioreactor technology, facilitating single-stage autotrophic nitrogen removal. Two laboratory-scale MABRs equipped with non-woven fabrics were operated simultaneously without and with a self-forming dynamic membrane (SFDM) filtration module. After 87 days of operation (system start-up), the reactor incorporated with SFDM filtration showed better performance in terms of total nitrogen removal (>80%) and effluent suspended solid (less than1 mg/L) than the MABR in the up flow anaerobic sludge blanket (UASB) configuration (i.e., without SFDM). The incorporation of SFDM has the ability to retain more slow growing biomass (anammox) inside the reactor. Microbial characterization by 16S rRNA-based amplicon sequencing shows that the abundance and composition of microbial communities in two MABR systems were different, i.e., the genusRhodanobacterwas abundant in UASB-MABR, while Calorithrixwas dominant in SFDM-MABR. PCA-based statistical analysis demonstrated a positive association between reactor performance, membrane characteristics and microbial communities.
膜曝气生物膜反应器（MABR）是一种新型的生物反应器技术，可实现单一阶段的自养脱氮。两个配备无纺纤维的实验室规模 MABR 同时运行，一个配备自形成动态膜（SFDM）过滤模块，另一个不配备。在 87 天的运行（系统启动）后，与 SFDM 过滤相结合的反应器在总氮去除（>80%）和出水悬浮固体（小于 1mg/L）方面的性能优于上流式厌氧污泥床（UASB）配置的 MABR（即，不配备 SFDM）。SFDM 的加入能够在反应器内保留更多生长缓慢的生物量（厌氧氨氧化菌）。基于 16S rRNA 扩增子测序的微生物特征表明，两个 MABR 系统中的微生物群落的丰度和组成不同，即 Rhodanobacter 属在 UASB-MABR 中丰富，而 Calorithrix 属在 SFDM-MABR 中占优势。基于 PCA 的统计分析表明，反应器性能、膜特性和微生物群落之间存在正相关关系。
