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.
出处
《环境科学》
EI
CAS
CSCD
北大核心
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)
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
microporous aerator
operation condition
off-gas method
oxygen mass transfer coefficient
oxygenating capacity
oxygen utilization ratio
