摘要
针对广西玉林某工业园区污水处理厂二级工艺处理后的印染废水,利用铁刨花原位改性制备的铁基催化剂进行催化臭氧氧化中试,考察催化臭氧氧化技术对印染废水COD和色度的处理效果。实验结果表明:在本研究所使用的催化臭氧氧化反应器和反应条件下,进水COD在40~60 mg·L^(-1)范围,色度在80~120度范围,pH在6~9的印染废水,经过该工艺的处理可使出水水质稳定达到《纺织染整行业回用水水质》(FZ/T 01107—2011)标准。当进水COD维持在40 mg·L^(-1)以下时,出水COD可降至30 mg·L^(-1)甚至20 mg·L^(-1)以下,出水水质满足《地表水环境质量标准》(GB 3838—2002)Ⅳ类水标准。水力停留时间对处理效果的影响呈正态分布,建议值为60 min。铁基催化剂的活性组分和“微通道”结构,有利于臭氧与催化组分的结合以及羟基自由基的释放与作用,从而提高了臭氧利用率,使O_(3)/ΔCOD的值基本控制在2以下。
A pilot-scale catalytic ozonation was conducted for the advanced treatment of dyeing wastewater from the secondary treatment process in a sewage treatment plant in Yulin,Guangxi Province.An iron-based catalyst derived from in-situ modification of iron shavings was used to investigate the performance of catalytic ozonation on COD and color removal of dyeing wastewater.The results showed that with the catalytic ozonation reactor and reaction conditions used in this study,the influent COD ranged from 40 to 60 mg·L^(-1),the color ranged from 80 to 120 PCU,and the pH value ranged from 6 to 9.The effluent water quality was stabilized to meet the Reusing Water for Textile Dyeing and Finishing(FZ/T 01107—2011)standard after undergoing this treatment process.Especially when the influent COD was maintained below 40 mg·L^(-1),the effluent COD could be reduced to 30 mg·L^(-1) or even 20 mg·L^(-1),and the effluent water quality met the Environmental Quality Standards for Surface Water(GB 3838—2002)Class IV water standard.The hydraulic retention time(HRT)on the treatment effect followed normal distribution.Under the experimental conditions,the optimal HRT for this wastewater was 60 min.The active components and the"micro-channel"structure of the iron-based catalyst were conducive to the combination of ozone and the catalytic components,and also promoted the release and action of hydroxyl radicals.Therefore,the ozone utilization rate was improved,with the O_(3)/ΔCOD value remaining below 2.
作者
樊金红
阳钰玮
马鲁铭
FAN Jinhong;YANG Yuwei;MA Luming(College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China)
出处
《能源环境保护》
2024年第1期128-133,共6页
Energy Environmental Protection
基金
国家重点研发计划资助项目(2022YFC3203302)。
关键词
铁基催化剂
催化臭氧
印染废水
运行参数
Iron-based catalyst
Catalytic ozonation
Dyeing wastewater
Operating parameters
