响应面法优化UV/O_(3)催化氧化RO浓水处理工艺参数  

Optimized UV/O_(3)Catalytic Oxidation Process Parameters by Response Surface Methodology for RO Concentrated Water Treatment

作　　者：朱晓岩 ZHU Xiaoyan(Shanghai Water Engineering Design&Reasearch Institute Co.,Ltd.,Shanghai 200232,China)

机构地区：[1]上海市水利工程设计研究院有限公司,上海200232

出　　处：《净水技术》2025年第2期139-147,165,共10页Water Purification Technology

摘　　要：【目的】该研究将紫外(UV)与臭氧(O_(3))催化氧化工艺相耦合,以上海某化工厂生产废水处理工艺产生的二级反渗透(RO)浓水为研究对象进行研究,探究不同温度、初始pH和O_(3)投加量对二级RO浓水COD_(Cr)、UV_(254)去除率的影响,并进一步优化工艺参数,得到最佳的处理效果。【方法】在单因素试验的基础上,采用响应面优化法(RSM)分析温度、初始pH和O_(3)投加量3种主要因素及其交互作用对二级RO浓水COD_(Cr)、UV_(254)去除率的影响,并对该工艺参数进行优化。【结果】试验结果表明,温度、初始pH和O_(3)投加量这3种因素对UV/O_(3)催化氧化耦合工艺的影响程度为:温度>初始pH>O_(3)投加量。对于COD_(Cr)去除率,各因素两两之间交互作用的显著强弱顺序为:温度与O_(3)投加量>初始pH与O_(3)投加量>温度与初始pH。对于UV_(254)去除率,各因素两两之间交互作用的显著强弱顺序为:温度与O_(3)投加量>温度与初始pH>初始pH与O_(3)投加量。在O_(3)催化剂为20mg/L,UV光照强度为50μW/cm^(2),反应时间为60min的反应条件下,温度为23.2℃、初始pH值为10.6、O_(3)投加量为14g/h时RO浓水处理效果最佳,COD_(Cr)、UV_(254)去除率分别能达到63.27%、73.01%。【结论】通过模型验证,证实了box-behnken设计(BBD)响应面模型可有效优化UV/O_(3)催化氧化工艺参数。[Objective]In this study,the coupling of ultraviolet(UV)and ozone(O_(3))catalytic oxidation process is studied on the secondary reverse osmosis(RO)concentrated water produced by the production wastewater treatment process of a chemical plant in Shandong province.The study investigates the effects of different temperatures,initial pH values,and O_(3)dosages on removal rates of COD_(Cr)and UV254 in secondary RO concentrated water,and further optimizes process parameters to achieve the best treatment effect.[Methods]On the basis of single factor experiments,response surface methodology(RSM)was used to analyze the effects of three main factors including temperature,initial pH value and O_(3)dosage,and their interactions on removal rates of COD_(Cr)and UV254 in secondary RO concentrated water,and optimized the process parameters.[Results]The experimental results indicated that the degree of influence of temperature,initial pH value,and O_(3)dosage on the UV/O_(3)catalytic oxidation coupling process was as follows:temperature>initial pH value>O_(3)dosage.For COD_(Cr)removal rate,the significant order of interaction between each factor was:temperature and O_(3)dosage>initial pH and O_(3)dosage>temperature and initial pH.For removal rate of UV254,the significant order of interaction between each factor was:temperature and O_(3)dosage>temperature and initial pH>initial pH and O_(3)dosage.Under the reaction conditions of 20 mg/L O_(3)catalyst,50μW/cm^(2)ultraviolet light intensity,and 60 minutes of reaction time,the optimal RO concentrated water treatment effect was achieved at a temperature of 23.2℃,an initial pH value of 10.6,and an ozone dosage of 14 g/h.The COD_(Cr)and UV254 removal rates can reach 63.27%and 73.01%,respectively.[Conclusion]Through model validation,it has been confirmed that the box-behnken design(BBD)response surface model can effectively optimize the process parameters of UV/O_(3)catalytic oxidation.

关 键 词：反渗透(RO)浓水 响应面法 紫外(UV)/臭氧(O_(3)) 催化氧化 box-behnken设计(BBD)优化法 

分 类 号：X703[环境科学与工程—环境工程]