微米气泡强化再生水臭氧消毒的中试研究  

Enhanced Ozone Disinfection of Reclaimed Water by Micro-bubble

作　　者：孙勇[1] 张朋锋[1,2] 徐俊[1] 白宇[3] 赵金[4] 

机构地区：[1]哈尔滨工程大学航天与建筑工程学院,黑龙江哈尔滨150001 [2]威立雅水务设施技术管理<北京>有限责任公司,北京100004 [3]北京城市排水集团有限责任公司,北京100022 [4]中国恩菲工程技术有限公司,北京100038

出　　处：《中国给水排水》2012年第21期58-60,65,共4页China Water & Wastewater

基　　金：中央高校基本科研业务费专项资金资助项目(HEUCFZ1124)

摘　　要：以再生水为研究对象,考察了微米气泡强化臭氧消毒的效果。在微米气泡发生器中,控制水气比在3.5～6.5之间时臭氧的传质效率最佳,此时液相臭氧浓度最高可达6.4 mg/L。在相同投量下,臭氧在微米气泡形式下的传质效率是毫米气泡(鼓泡曝气)形式下的2～3.5倍,并且微米气泡形式下臭氧在水中的停留时间更长,从而导致臭氧对色度、UV254和TOC的去除率更高,相比毫米气泡形式可分别提高30%、9%和5%以上。另外,达到相同的消毒效果时,微米气泡形式下所需的臭氧投量更少。在微米气泡形式下,当臭氧投量为8 mg/L时,出水中的总大肠菌群可降至10个/L以下,粪大肠菌群未检出,细菌总数可降至2个/mL。The enhanced ozone disinfection of reclaimed water by micro-bubble was investigated. When the water-gas ratio was between 3.5 and 6.5 in micro-bubble aeration, the dissolved ozone concentration was up to 6.4 mg/L. With the same dose, ozone micro-bubble dissolution rate was increased by 1 to 2.5 times more than mm-bubble. Due to longer HRT of micro-bubble ozone, the removal rates of eolor, UV254 and TOC were increased by above 30% , 9% and 5% respectively compared with those of mmbubble ozone. The demand for micro-bubble ozone was lower to achieve the same disinfection effect. When the micro-bubble ozone dose was 8 mg/L, the total coliforms in the effluent were less than 10 CFU/L, fecal coliforms were not detected, and the total bacterial count was decreased to 2 CFU/mL.

关 键 词：再生水 臭氧消毒 微米气泡 毫米气泡 

分 类 号：X703[环境科学与工程—环境工程]