河北科技大学学报2012，Vol.33Issue(5)：469-474,6.
典型污染物对微气泡曝气中氧传质特性的影响
Effect of typical contaminants on oxygen transfer in microbubble aeration
摘要
Abstract
Microbubble aeration is a new type of bubble aeration, and contaminants in waste water has great influence on oxygen transfer in microbubble aeratioa The effects of different typical contaminants on oxygen transfer in microbubble aeration were investigated by using a gas-water circulation type microbubble generator, including surfactants, soybean oil, phenol and nitrobenzene as well as suspended solid (kaolin). The results indicate that different from traditional bubble aeration, microbubble aeration seems like milk-turbid due to very small bubble size. The soluble organic contaminants improve generation and stability of microbubbles, resulting in higher gas holdup and gas retention time. The range of oxygen transfer coefficient Kla is 7. 44～11. 56 h-1 , and the range of α-factors is 0. 77～1. 20 in microbubble aeration with the typical contaminants under all test conditions, larger than those in traditional bubble aeration. The improvement of microbubble generation and stability in presence of the contaminants should be responsible for the reduction of negative effect of contaminants on oxygen transfer.The gas hold-up and contaminant type are the important influencing factors for oxygen transfer in microbubble aeratioa.关键词
微气泡曝气/典型污染物/气含率/氧传质系数/α因子Key words
microbubble aeration/ typical contaminants/ gas holdup/ oxygen transfer coefficient/ or factor分类
资源环境引用本文复制引用
吕越,刘春,杨枭,吴克宏..典型污染物对微气泡曝气中氧传质特性的影响[J].河北科技大学学报,2012,33(5):469-474,6.基金项目
河北省应用基础研究计划重点基础研究项目(11966726D) （11966726D）
