催化臭氧氧化处理中药废水生化工段出水效能  

Treating Efficiency of Effluent from Biochemical Section of Traditional Chinese Medicine Wastewater by Catalytic Ozonation

作　　者：赵海梅 刘嘉仪 棠钟艺 杨涛[1] 万兆刚 莫龙飞 Zhao Haimei;Liu Jiayi;Tang Zhongyi;Yang Tao*;Wan Zhaogang;Mo Longfei(Jiangxi Province Engineering Research Center of Ecological Chemical Industry,Jiujiang University,Jiujiang 332005,China;Sichuan Zhongde Shengda Environmental Engineering Co.,Ltd.,Chengdu 443099,China)

机构地区：[1]九江学院江西省生态化工工程技术研究中心,江西九江332005 [2]四川中德盛达环境工程有限公司,四川成都443099

出　　处：《山东化工》2022年第17期201-204,共4页Shandong Chemical Industry

基　　金：国家自然科学基金项目(22068015);大学生创新创业训练计划项目(X2021111843195,X2021111843196)。

摘　　要：利用催化臭氧氧化技术对青黛加工废水生化工段出水进行处理,对催化臭氧剂进行筛选并进行工艺优化,探讨了催化臭氧氧化工艺运行可行性。结果表明:采用贵金属负载的多孔陶粒基催化剂催化效率最优,增加催化剂的用量并调节pH值至9,可以有效提高催化臭氧氧化效率,在工艺运行初期,其色度去除速率明显高于COD_(Cr),60 min后色度便可达到标准限值。相比不投加催化剂而言,COD_(Cr)去除率可以提高25%,色度可以提前90 min到达国家排放标准。工艺运行0~120 min内,催化臭氧氧化反应速率较快,为传质控制过程,后期催化氧化速率不断减低,逐步变为反应控制而导致臭氧利用率不断降低。The catalytic ozone oxidation technology was applied for the treatment of effluent from the biochemical section of indigo naturalis processing.The ozone catalysts were screened and the processes were optimized in the study.The feasibility of ozone catalytic oxidation process was discussed.The results showed that the noble metal based catalyst supported on porous ceramsite showed the best catalytic efficiency.Increasing the amount of catalyst and adjusting the pH value to 9 effectively improved the efficiency of ozone catalytic oxidation.In the initial stage of process operation,the color removal rate was significantly higher than that of COD_(Cr),and the color meeted the emission standard after 60 minutes.Compared with no catalyst,the COD_(Cr) removal rate improved 25%,and the color could meet the national emission standard 90 minutes in advance.Within 0~120 minutes of process operation,the ozone catalytic oxidation reaction rate was much fast due to a mass transfer control process.In the later stage,the catalytic oxidation rate decreased continuously and was gradually changed into a reaction control process resulting in the continuous reduction of ozone utilization.

关 键 词：臭氧 催化氧化 青黛加工废水 脱色 

分 类 号：X703.1[环境科学与工程—环境工程] TQ028.8[化学工程]