微孔曝气器孔径与运行气量对微孔曝气氧传质的影响研究  

Effects of pore diameter and air flow rate on oxygen mass transfer in fine pore aeration

作　　者：贾荣畅[1] 刘颖[2] 朱燕[3] 庄健[3] 尹训飞 齐鲁[3] 王洪臣[3] 张源凯[3] 

机构地区：[1]山东省化工研究院,山东济南250014 [2]中国科学院生态环境研究中心,北京100085 [3]中国人民大学环境学院,北京100872

出　　处：《环境污染与防治》2015年第8期75-79,共5页Environmental Pollution & Control

摘　　要：曝气是污水生物处理最重要的单元之一,也是能耗最高的单元,微孔曝气氧传质影响因素的探究一直是污水处理领域的研究热点。微孔曝气器的孔径与其运行气量是影响微孔曝气氧传质的重要因素。在1.5m水深条件下对不同孔径的钟罩型刚玉微孔曝气器在不同运行气量条件下的充氧性能进行了评价。结果表明,随微孔曝气器孔径增大,标准氧总转移系数(KLas)、标准氧转移速率(SOTR)、阻力损失(RL)、标准氧转移效率(SOTE)及理论动力效率(SAE)减小;随运行气量增大,KLas、SOTR、RL显著增大,而SAE、SOTE减小。Aeration system was one of the most important parts in the wastewater treatment plants,and accoun- ted for the largest fraction of energy consumption. Research on the impact factors of oxygen mass transfer had re- ceived considerable attention in wastewater treatment field. Pore diameter and air flow rate were two important factors that affected the oxygenation performance. The paper studied the impacts through a pilot test using the corundum bell-type fine bubble diffusers at 1.5 m water depth. The results showed that KLas ,SOTR, RL, SOTE and SAE de- creased with the pore diameter increasing;however, KLas, SOTR, RL increased with the air flow rate increasing and SAE,SOTE decreased with air flow rate increasing.

关 键 词：微孔曝气 氧传质 孔径 运行气量 充氧性能 

分 类 号：X703[环境科学与工程—环境工程]