%0 Journal Article
%T Theoretical Analysis and Experimental Research of Ozone Gas Mass Transfer Efficiency in Activated Sludge<br>活性污泥中臭氧传质效率的理论分析与实验研究
%A WANG Zheng
%A WANG Lin
%A WANG Bao-zhen
%A JIANG Yi-feng
%A LIU Shuo
%A ZHU Ge-fu
%A <br>王正
%A 王琳
%A 王宝贞
%A 蒋轶锋
%A 刘硕
%A 朱葛夫
%J 环境科学
%D 2007
%I 
%X Based on theoretical analysis, a mathematics model was primarily set up to describe the relationship between the ozone mass transfer efficiency (U) and the systematic factors, including sludge concentration, input gas concentration, mixed liquor height h, observed gas velocity uobs and the bubble diameter d. By different experimental design, furthermore, the contribution of these factors for transfer efficiency was investigated respectively. The results show that the mixed liquor height h and bubble diameter d impacted the mass transfer efficiency of ozone more significantly, as compared to the other factors of sludge concentration, input gas concentration and observed gas velocity uobs. When mixed liquor height h was 0.2m, the ozone gas utilization U was only 0.45; when h was 0.8m, U increased to 0.883; when h was 1.4, U was almost up to 1. The U and h show strong index relationship. For mixed liquor with h 0.8m, when bubble diameter d decreased from 0.0075 to 0.005, U increased from 0.89 to 0.96, and, for mixed liquor with h 0.6m, similar increase from 0.8 to 0.93 was observed. According to the acquired experimental data, a quantitative expression among mass transfer efficiency U, mixed liquor height h and mean bubble diameter d, with R2 equal to 0.8616, was finally obtained, as a reference tool for project design.
%K sludge reduction
%K ozone gas
%K mass transfer efficiency
%K affecting factors
%K activated sludge<br>污泥减量
%K 臭氧
%K 传质效率
%K 影响因素
%K 活性污泥
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=15BD448442B396A3BBBB9E4D3142CDF6&yid=A732AF04DDA03BB3&vid=D3E34374A0D77D7F&iid=5D311CA918CA9A03&sid=10AEA069F4433410&eid=E8941A3800A46ABD&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=21