污水厂微孔曝气系统工况下充氧性能测试与分析  

Measurement and Analysis of Micropore Aeration System's Oxygenating Ability Under Operation Condition in Waste Water Treatment Plant

作　　者：吴媛媛[1,2] 周小红[1] 施汉昌[1] 邱勇[1] 

机构地区：[1]清华大学环境学院,北京100084 [2]北京交通大学土木建筑工程学院,北京100044

出　　处：《环境科学》2013年第1期194-197,共4页Environmental Science

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07313-003)

摘　　要：以无锡芦村污水处理厂四期曝气池为研究背景,采用尾气法测定了微孔曝气头在实际污水厂正常运行工况下的充氧性能参数,与理论清水中该值比较,评价曝气头运行情况.结果表明,在污水处理厂曝气池不同廊道分布的曝气头氧传质性能存在显著差异,同一廊道的曝气头在一天内的氧传质能力变化不大.与清水条件相比,实际工况下曝气池中的微孔曝气头充氧性能下降较大,其中氧传质系数KLa、充氧能力OC和氧利用率Ea分别下降了43%、57%和76%.Using the aeration pool in the fourth-stage at Wuxi Lucun Waste Water Treatment Plant（WWTP） as experimental setup,off-gas method was selected to measure the oxygenating ability parameters of micropore aerators in a real WWTP operating condition and these values were compared with those in fresh water to evaluate the performance of the micropore aerators.Results showed that the micropore aerators which were distributed in different galleries of the aeration pool had significantly different oxygenating abilities under operation condition.The oxygenating ability of the micropore aerators distributed in the same gallery changed slightly during one day.Comparing with the oxygenating ability in fresh water,it decreased a lot in the real aeration pool,in more details,under the real WWTP operating condition,the values of oxygen transfer coefficient KLa,oxygenation capacity OC and oxygen utilization Ea decreased by 43%,57% and 76%,respectively.

关 键 词：微孔曝气头 工况 尾气法 氧传质系数 充氧能力 氧利用率 

分 类 号：X703.1[环境科学与工程—环境工程]