气提回流A/O-MBBR双泥系统脱氮除磷研究

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中图分类号： X52 文献标志码：ADOI：10.13338/j. issn. 1674-649x. 2025.01.015

Study on nitrogen and phosphorus removal by air stripping reflux A2 /O-MBBR with double sludge system

ZHOU Yuhong ，YU Xiang ，ZHOU Kaile ，CHENG Gang （School of Environmental and Chemical Engineering，Xi'an Polytechnic University，Xi'an 71048，China）

Abstract In order to improve the efficiency of nitrogen and phosphorus removal of traditional A2/O and reduce energy consumption，the nitrification mixed liquid and sludge were refluxed by air stripping，and the filler was added to the aerobic pond to form an air stripping reflux A2/O. MBBR double sludge system. Thus the sludge age of nitrifying bacteria and phosphorus accumulation bacteria was independent of each other to strengthen the effect of denitrification and phosphorus removal，while achieving the purpose of reducing energy consumption. The effects of nitrification liquid reflux ratio，sludge reflux ratio and dissolved oxygen （DO） by air stripping reflux A2 /O-MBBR were researched. The results show that the average removal rates of TN and TP were 81.51% and 78% ，respectively，when the nitrification liquid reflux ratio was 300% . The average removal rates of TN and TP were 80.12% and 75.36% ，respectively，when sludge reflux ratio was 100% . The average removal rates of TN and TP were 82.59% and 77.07% ，respectively，when DO ranges from 2.0mg/L to 2.5mg/L

Keywords A2/O-MBBR ; air stripping reflux; double sludge system； nitrogen and phosphorus removal

0引言

移动床生物膜反应器（movingbedbiofilmre-actor，MBBR）是一种新型生物膜反应器，它在固定床反应器、流化床反应器和生物滤池的基础上发展起来，是一种改进的新型复合生物膜反应器。（剩余12422字）