Effect of Filling Rate on Oxygen Transfer Coefficient of Different Diffusers in MBBR Process

• 作 者: Sun Lifeng Zhang Feng Liu Changqing Li Shuai Liu Ying
• 机 构: School of Computer Engineering,Qingdao Technological University,Qingdao 266033
• 出 处: 2015(第十届)青岛国际脱盐大会暨全国冶金节水与废水利用技术研讨会
• 发表日期: 2015年3期
• 关键词: filling rate diffuser oxygen transfer coefficient MBBR process

　　This paper mainly discussed the effect of filling rate on oxygen transfer coefficient of different diffusers in MBBR process.The result shows, because of the cutting action on micro bubbles and improving for microscopic hydrodynamic flow regime of reactor, the fillers can increase oxygen transfer coefficient of micro porous membrane diffuser whether in clean water or in mixed liquor test.Compare to the blank test without fillers, dosing filler can increase oxygen transfer coefficient of micro porous membrane diffuser at most 10.78% in clean water test and 10.17% in mixed liquor test.Dosing filler can increase oxygen transfer coefficient of campanulate corundum aerator and perforated pipe more than micro porous membrane diffuser.Compare to the blank test, dosing filler can increase KLa of campanulate corundum aerator and perforated pipe diffuser at most 13.40%, 17.74% in clean water test and 10.97%, 20.14% in mixed liquor test respectively.