总溶解性固体(TDS)对微孔曝气氧总转移系数的影响研究  

STUDY ON EFFECTS OF TDS ON OXYGEN MASS TRANSFER COEFFICENT OF FINE BUBBLE AERATION SYSTEM

作　　者：庄健[1] 齐鲁[1] 刘国华[1] 李美娣[1] 张晓军[1] 王洪臣[1] 

机构地区：[1]中国人民大学环境学院,北京100872

出　　处：《环境工程》2013年第6期45-48,共4页Environmental Engineering

基　　金：国家高技术研究发展计划(863)项目(2009AA063804);国家重大科技专项--水体污染控制与治理(2011ZX07316-001)

摘　　要：鼓风曝气时的氧传质影响因素的探究一直是污水处理领域的研究热点,总溶解性固体(TDS)是影响微孔曝气氧传质的重要因素之一。通过中试试验,研究了TDS浓度对微孔曝气器氧总转移系数(K La)的影响,并推导了微孔曝气器氧总转移系数关于TDS浓度的经验公式。结果表明:K La随TDS浓度的增大而增大,其经验公式为K La=0.0090(72.4934+0.2334TDS)0.2569。The research on the impact factors of oxygen mass transfer has received considerable attention in wastewater treatment field. Total dissolved solid （TDS） is one of the important factors affecting oxygen mass transfer of a fine bubble aeration system. The impact of TDS concentration on overall oxygen transfer coefficient （KLa） was evaluated through a pilot test. The results indicated that the KLa increased with increasing the concentration of TDS, whose empiric formula of KLa and TDS can be described as KLo =0. 0090（72. 4934 ＋0. 2334TDS）0.2569.

关 键 词：微孔曝气器 TDS 氧总转移系数 表面张力 气泡直径 

分 类 号：X703[环境科学与工程—环境工程]