臭氧微气泡协同氧化处理己内酰胺生产废水的效能研究  

Treatment efficiency of caprolactam production wastewater by microbubble ozone combined with oxidation

作　　者：孙景彤 梁家豪 盛丹娜 刘永泽 SUN Jingtong;LIANG Jiahao;SHENG Danna;LIU Yongze(Beijing Key Lab for Source Control Technology of Water Pollution,College of Environmental Science and Engineering,Beijing Forestry University,Beijing 100083,China;Engineering Research Center for Water Pollution Source Control&Eco-remediation,College of Environmental Science and Engineering,Beijing Forestry University,Beijing 100083,China)

机构地区：[1]北京林业大学环境科学与工程学院水体污染源控制技术北京市重点实验室,北京100083 [2]北京林业大学环境科学与工程学院污染水体源控制与生态修复技术北京市高等学校工程研究中心,北京100083

出　　处：《化工环保》2024年第4期495-502,共8页Environmental Protection of Chemical Industry

基　　金：国家自然科学基金项目(52070014)。

摘　　要：以己内酰胺生产废水中的环己酮肟为目标污染物,优化了微气泡产生方式、臭氧微气泡协同氧化工艺及工艺参数,探究了废水的处理效能和降解机理。从降解效果、臭氧利用率及能耗等角度在加压溶气、机械剪切和微孔曝气盘3种臭氧微气泡产生方式中优选出微孔曝气盘方式,其环己酮肟降解率可由常规大气泡的45.7%升至72.0%。在H_(2)O_(2)、过一硫酸盐(PMS)以及活性γ-Al_(2)O_(3)小球催化剂与臭氧微气泡的协同氧化工艺中,臭氧微气泡协同PMS氧化工艺对环己酮肟的降解效果最好,降解速率常数可达0.1830 min^(-1)。臭氧微气泡协同PMS氧化工艺的最佳PMS投加量为5μmol/L、臭氧投加量为10.0 mg/min、废水pH为9,该条件下反应15 min,环己酮肟降解率可达95%以上。Cyclohexanone oxime in caprolactam production wastewater was taken as the target pollutant,and the microbubble generation method,collaborative oxidation process of microbubble ozone,and operation parameters were optimized,so as to explore the wastewater treatment efficiency and degradation mechanism.From the perspective of degradation efficiency,ozone utilization rate,and energy consumption,the micro-porous aeration disk was selected as the optimal method among the three microbubble ozone generation methods,with the other two methods of pressurized gas dissolution and mechanical shearing.The degradation rate of cyclohexanone oxime could be increased from 45.7%of conventional large bubbles to 72.0%.Among the collaborative oxidation processes of microbubble ozone with H_(2)O_(2),peroxymonosulfate(PMS),and activeγ-Al_(2)O_(3)catalyst,the collaborative oxidation process of microbubble ozone with PMS had the best degradation efficiency on cyclohexanone oxime,with a degradation rate constant of 0.1830 min^(-1).The optimal PMS dosage for the collaborative oxidation process of microbubble ozone with PMS was 5μmol/L;the optimal ozone dosage was 10.0 mg/min,and the optimal wastewater pH was 9.Under these conditions,the degradation rate of cyclohexanone oxime could reach over 95%after 15 min of reaction.

关 键 词：微气泡 臭氧 催化氧化 己内酰胺 过一硫酸盐 环己酮肟 

分 类 号：X703[环境科学与工程—环境工程]