净水技术2024，Vol.43Issue(4)：104-113,10.DOI:10.15890/j.cnki.jsjs.2024.04.013
夏冬两季AAO工艺微孔曝气系统性能测定与评价
Determination Measurement and Evaluation of Aeration Performance of Fine-Pore Aeration System for AAO Process in Summer and Winter
摘要
Abstract
A municipal wastewater treatment plant(WWTP)in Shanghai was taken as the research object.The pollutant removal effect and aeration system performance were systematically measured and evaluated through field tests along the aerobic tank in summer and winter.Results showed that the effluent quality in both summer and winter met the first class A discharge standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002),because the hydraulic load was less in winter than in summer and the aerobic tank had longer hydraulic residence time and adequate aeration,which offset the negative effect of low temperature on nitrification.Compared with those in summer,the total oxygen demand of the biological treatment process in winter was higher and the oxygen transfer efficiency of the fine-pore aeration system was lower,resulting in a higher required air supply and lower aeration efficiency.The oxygen supply was 38.99%and 7.07%higher than the oxygen demand in summer and winter,respectively,with a higher energy saving potential in summer.The pollutant concentration of aerobic tank gradually decreases along the tank,and the pollutant concentration at the end remains almost the same,while the dissolved oxygen concentration at the end was much higher than the front end,which meant that the oxygen supply at the end was not used for CODCr oxidation and ammonia oxidation,therefore over-aeration occurs,so the air supply at the end of aerobic tank can be reduced.关键词
AAO工艺/微孔曝气系统/曝气能耗/氧传质效率/尾气测试Key words
AAO process/fine-pore aeration/aeration energy consumption/oxygen transfer efficiency/off-gas test分类
建筑与水利引用本文复制引用
李云辉,张振健,陈柳宇,张鸣,蒋路漫,周振..夏冬两季AAO工艺微孔曝气系统性能测定与评价[J].净水技术,2024,43(4):104-113,10.基金项目
国家自然科学基金青年项目(51808332) （51808332）
