重庆大学学报2026，Vol.49Issue(6)：39-49,11.DOI:10.11835/j.issn.1000-582X.2025.261
溶解氧对不同进水有机物好氧颗粒污泥系统的影响
Effects of dissolved oxygen on aerobic granular sludge systems under different influent organic loads
摘要
Abstract
This study aims to elucidate the effects of dissolved oxygen(DO)on aerobic granular sludge(AGS)systems treating influent with different organic matter concentrations.Two AGS reactors,i.e.R1(low organic load)and R2(high organic load),were operated under DO ranges of 4 mg/L to 6 mg/L and 2 mg/L to 4 mg/L to investigate differences in pollutant removal performance,microbial community structure,and functional gene profiles.The results show that after reducing the DO concentration maintained high removal efficiencies of chemical oxygen demand(COD)and total phosphorus(TP)in both reactors.Meanwhile,the rates of endogenous denitrification coupled with simultaneous nitrification increased by 17.54%and 7.05%in R1 and R2,respectively,with corresponding increases of 9.84%and 6.11%in their contribution to total nitrogen removal.Lower DO levels also induced shifts in microbial community structure,enriching functional microorganisms associated with nitrogen and phosphorus removal.In addition,the abundance of genes related to denitrification and intracellular carbon utilization increased,promoting enhanced nutrient removal performance in the AGS systems.Furthermore,DO variation exerted a more pronounced effect on the low-organic system(R1),indicating that more accurate DO control is required in such conditions for optimal operation.关键词
好氧颗粒污泥/溶解氧/有机物浓度/微生物群落/功能预测Key words
aerobic granular sludge/dissolved oxygen/organic loading/microbial community/functional genes分类
资源环境引用本文复制引用
陈泽宇,杨蕤,姜莉雯,童美菱,方芳,郭劲松..溶解氧对不同进水有机物好氧颗粒污泥系统的影响[J].重庆大学学报,2026,49(6):39-49,11.基金项目
国家自然科学基金(52470027,51878091) （52470027,51878091）
中央高校基本科研业务费(2023CDJKYJH010).Supported by National Natural Science Foundation of China(52470027,51878091)and the Fundamental Research Funds for the Central Universities grant(2023CDJKYJH010). （2023CDJKYJH010）
