摘要
针对臭氧在水中不易溶解的现象,采用自制静态螺旋切割装置强化臭氧氧化苯酚废水,考察了臭氧进气流量、液体流量以及初始pH对苯酚降解率的影响,并对比了不同气液混合方式下臭氧传质效果及苯酚降解率。结果表明,静态螺旋切割装置可以强化臭氧在水中的传质,9min后液相臭氧质量浓度可达12mg/L左右,远高于常规曝气及循环气液混合方式下的液相臭氧浓度。在臭氧进气流量为2.0L/min、液体流量6L/min、初始pH为7时,反应12min,螺旋切割强化臭氧氧化的苯酚降解率可达97.09%,比常规曝气和循环气液混合下的苯酚降解率分别提升64.21百分点和35.53百分点。
In order to increase the solubility of ozone in water,a new self-made spiral cutting device was developed to enhanced the ozone mass transfer so as to improve oxidation of ozone for phenol wastewater treatment.The effects of ozone inlet flow rate,liquid flow rate and initial pH on phenol degradation rate were investigated.Also,the effects of ozone mass transfer in different aeration ways and phenol oxidation degradation were compared.The results showed that the new type of spatial spiral cutter enhanced the mass transfer of ozone in water signficantly,the concentration of ozone in water was up to about 12 mg/L after 9 min,which was higher than the conventional aeration and circulating mixure.The degradation rate of phenol reached 97.09% under the condition of 2.0 L/min ozone inlet flow rate,6 L/min liquid flow rate and initial pH of 7.Compared with the bubbling oxidation of ozone,the degradation rate of phenol was greatly improved by 64.21 percent point and 35.53 percent point respectively.
作者
吴璨
赵枫
崔政伟
WU Can;ZHAO Feng;CUI Zhengwei(Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology,School of Mechanical Engineering,Jiangnan University,Wuxi Jiangsu 214122)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2018年第11期1239-1242,共4页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.21606109)
江苏省研究生科研创新计划项目(No.KYCX17-1474)
关键词
苯酚废水
螺旋切割器
臭氧氧化
phenol wastewater
spiral cutting device
ozone oxidation
