后置臭氧-下向流活性炭工艺中臭氧投加量的中试优化  

Pilot-Scale Optimization of Ozone Dosage in Rear Ozone Downflow Activated Carbon Process

作　　者：武珉辉 钱庆玲 刘爽 陈志辉 WU Minhui;QIAN Qingling;LIU Shuang;CHEN Zhihui(Shanghai National Engineering Research Center of Urban Water Resources Co.,Ltd.,Shanghai 200082,China;College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China;Shanghai Water Production Branch of SMIW,Shanghai 200086,China;Shanghai Waterworks Fengxian Co.,Ltd.,Shanghai 201400,China)

机构地区：[1]上海城市水资源开发利用国家工程中心有限公司,上海200082 [2]同济大学环境科学与工程学院,上海200092 [3]上海城投水务〈集团〉有限公司制水分公司,上海200086 [4]上海市自来水奉贤有限公司,上海201400

出　　处：《净水技术》2021年第10期49-55,共7页Water Purification Technology

基　　金：闵行水厂深度处理工艺评估与参数优化(KY.ZS.18.0004);上海市“超级博士后”资助(2019256)。

摘　　要：为实现采取"后置臭氧-下向流活性炭"工艺的金泽水厂中臭氧投加量的优化,依托中试装置研究了臭氧投加量对各构筑物处理效率的影响,并采用中心复合设计的(CCD)响应面模型优化了臭氧投加,同时,简析了该工艺对金泽原水中常见微污染物的处理效果。试验结果表明,水中UV254的去除主要发生在臭氧接触、混凝沉淀及活性炭单元,而高锰酸盐指数(CODMn)及总有机碳(TOC)的去除主要发生在混凝沉淀及活性炭单元。臭氧投加量的增加可提高臭氧接触池对有机物的去除效率,但过高的臭氧投加量不利于混凝沉淀及活性炭单元对有机物的去除。通过响应面模型预测了活性炭滤池出水中CODMn去除率最优值为65.4%,此时预臭氧及后臭氧投加量分别为1.02、1.36 mg/L。该工艺对金泽原水中常见抗生素及除去1,4-二氯苯、乙苯外的致嗅物质有较高去除率。In order to optimize ozone dosage in post ozone-downward flow activated carbon process for water works taking raw water from Jinze reservoir,pilot-scale experiments were conducted to study the impact of ozone dosages on the processing efficiency of each unit.Central composite response surface design was adopted to optimize ozone addition,meanwhile,the removal efficiency of micropollutants in water of Jinze reservoir was also analyzed.Results showed that the removal of UV254 mainly occurred in ozonation contact reactor,coagulation and sedimentation basin and activated carbon filter,while the removal of CODMn and TOC mainly occurred in coagulation and sedimentation basin and activated carbon filter.Increase of ozone dosage is beneficial to the removal of organics in ozonation contact reactor,however,excessive ozone injection is not conducive to the removal of organics in coagulation and sedimentation basin and activated carbon filter.Optimal removal rate of CODMn for activated carbon filter compared to raw water was 65.4%predicted by the response surface model,under the condition that pre-ozone and post-ozone dosage was 1.02 and 1.36 mg/L,respectively.Moreover,pilot-scale process is highly effective in removing typical antibiotics and odor compounds except 1,4-dichlorobenzene and ethylbenzene in Jinze reservoir.

关 键 词：臭氧氧化 臭氧投加量 混凝沉淀 活性炭池 响应面模型 

分 类 号：TU991.2[建筑科学—市政工程]