环境工程学报2025，Vol.19Issue(3)：586-594,9.DOI:10.12030/j.cjee.202409101
MABR对初期雨水中的污染物去除特征及微生物群落分析
Pollutant removal characteristics from initial rainwater treated by MABR and its microbial community analysis
摘要
Abstract
In view of the characteristics of large pollution load,strong impact of initial rainwater,a type of dense non-porous membrane was used to build the membrane aerated biofilm reactor(MABR),the treatment effect of initial rainwater by it was investigated,and the characteristics of extracellular polymer substances(EPS)and microbial community in the MABR system were analyzed.The results demonstrated that the average removal rates of COD,NH4+-N,and TN were 90.90％,79.75％,and 43.75％,respectively,and the corresponding removal loads were 1.99 g·(m2·d)-1,0.30 g·(m2·d)-1,and 0.21 g·(m2·d)-1.These findings indicated that MABR had a good performance on the simultaneous removal of nitrogen and carbon.Compared with the inoculated sludge,the content of protein and polysaccharide in EPS increased by 19.37 mg·g-1 and 7.12 mg·g-1,respectively,indicating that more enzymes and nutrients were released during the activity of microorganisms.The increase of PN/PS contributed to maintain the stability of biofilm morphology.The three-dimensional excitation-emission matrix spectroscopy spectra of EPS revealed that the primary components of soluble-EPS(S-EPS),loosely bound-EPS(LB-EPS)and tightly bound-EPS(TB-EPS)were tyrosine,which was beneficial to the formation of biofilms.The microbial community analysis revealed that the biofilm harbored a diverse range of bacteria,including those involved in anaerobic ammonia oxidation,nitrification,and denitrification.The results of functional gene prediction showed that a significant increase in nitrogen removal genes within the MABR,which could accelerate both nitrification and denitrification processes.This research provides valuable insights for the engineering application of MABR in treating initial rainwater.关键词
膜曝气生物膜反应器/初期雨水/胞外聚合物/微生物群落/功能基因Key words
membrane aerated biofilm reactor/initial rainwater/extracellular polymer substances/microbial community/functional genes分类
环境科学引用本文复制引用
曹方禹,张浏,冯景伟,夏绍凤..MABR对初期雨水中的污染物去除特征及微生物群落分析[J].环境工程学报,2025,19(3):586-594,9.基金项目
安徽省住房城乡建设科学技术计划项目(2023-YF116) （2023-YF116）
