上海老港纳滤浓缩液再生制备除臭剂工艺研究  

Research of Recycling Deodorant Production on Concentrated Leachate in Laogang,Shanghai

作　　者：林小淇 申哲民[1] LIN Xiaoqi;SHEN Zhemin(School of Environmental Science and Engineering,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]上海交通大学环境科学与工程学院,上海200240

出　　处：《环境科学与技术》2021年第2期113-121,共9页Environmental Science & Technology

基　　金：环境保护部水体污染控制与治理专项(2017ZX07202005-005);上海交通大学医工交叉研究基金重点项目(YG2017ZD15)。

摘　　要：为探究垃圾渗滤液浓缩液资源化利用的新途径,该文以上海老港综合填埋场内产生的纳滤浓缩液为研究对象,采用芬顿氧化-絮凝沉淀相结合的方式对其进行降解预处理,后采用电解处理将浓缩液中的氯离子转化为氯酸根离子。分别使用响应面法和单因素法确定了芬顿氧化反应和絮凝反应的一系列理想反应条件,并对芬顿氧化反应中各因素之间的关联作用进行研究并拟合了回归公式。预处理出水的COD和TOC的平均去除率分别为95.3%和96.1%。在电解反应中最佳条件为pH=7.0,板间距离=1.0 cm,电流密度=18 A/dm2,电解时间=150 min,可制得最大浓度为(5.1±0.3)g/L的氯酸钠除臭剂。渗滤液出水的各项水质指标符合相关排放标准。在避免了人体健康隐患下进行了为期3个月的实地实验以评估生产除臭剂的功效,当地的空气报警概率和H2S浓度在使用该除臭剂后显著下降。该工艺在有效去除纳滤浓缩液污染物实现污水净化的同时可制备高氯除臭剂,实现了资源化再利用的目的。In order to explore a new method for recycling utilization of concentrated leachate,a series of experiments were employed on the nanofiltration(NF)concentrated leachate generated in Shanghai Laogang landfill.The whole treatment includes the Fenton-flocculation process for decontamination and electrolysis process for strong oxidizing agents production.The response surface and single-factor methodologies were utilized for optimizing Fenton process and flocculation process,respectively.A series of optimum conditions of Fenton process and flocculation process was selected.The interactions among the factors of Fenton process were analyzed and regression equation was subsequently fitted.The COD and TOC removal rate of the effluent was 95.3% and 96.1%.A non-diaphragm electrolysis was employed and the optimal conditions were distinguished which the maximum chlorate concentration of 5.1 g/L could be available.The deodorant was evaluated for testifying the effectiveness via a three-month in site experiment without any human body risk as the standard of landfill site was not surpassed.A significant decline in the H2S content and the warning probability of air was able to be observed.The process could achieve the removal of pollution validly and the production of deodorant,as well as the recycling of resource.

关 键 词：纳滤浓缩液 响应面法 芬顿絮凝 电解 

分 类 号：X703.5[环境科学与工程—环境工程]