表面活性剂对填料曝气塔充氧性能的影响.pdf

文档介绍：11 1
中国环境科学 2010,30(8):1073~1078 China Environmental Science
表面活性剂对填料曝气塔充氧性能的影响
张硕,王栋,姜春莉(大连理大学环境科学与技术学院,辽宁大连 16024) 1
摘要:针对废水中表面活性剂对曝气充氧能力的影响,研究了 ,十一二
烷基苯磺酸钠(SDBS)显著降低了传氧系数(2o),且在 7x10smol/L浓度附近札。I20)(CTAB)在
~×10 mol/L浓度区间却提高了曝气塔的传质系数 ,发现填料对传氧系
数 KLa(20)均有提高,海绵填料相比清水环境对体系 La∞、提高了约 ,离子型表面活性剂分子的双电层结构以及液相表面张力对
传质效果有影响,生物填料也是提高曝气过程传氧的方法之一‘.
关键词:曝气塔;表面活性剂;生物填料;传质系数
中图分类号: 文献标识码:A 文章编号: 1000—6923(2010)08 1073—06
Effect of surfactants on oxygenation capacity inbubbling Shuo,WANG Dong’,JIANG
Chun—li(School6024,China). Environmental andofScience Technology,DalianTechnology,Dalian1 of University 1
ChinaEnvironmentalScience,2010,3O(8):1073~1078
Abstract:Toofsurfactants onoxygenation effect studythe capacity,oxygen a inWas efficiency investigated mass transfer
three—phase aeration reactorwhere fourkinds ofgranular bio—media as well assurfactants Was found that
the oxygenationefficiency decreased obviously by SDBSand the reached 2o1 minimuma when theconcentration was
around 7~10 mol/,the mass transfer coefficient Was enhanced in the presence of CTAB where its
concentration Was in the range of ~×10 mol/ to parative investigation ofeffects on
oxygenationefficiencyamong granulardifferent bio—media,it Can be