常温常压水解预处理高盐度高质量浓度有机磷农药废水  

Pretreatment of high-salinity and high-concentration organophosphorus pesticide wastewater by hydrolysis method at normal temperature and pressure

作　　者：刘立芬[1,2] 茅佩卿[1] 徐德志[1] 阮慧敏[1] 

机构地区：[1]浙江工业大学绿色化学合成技术国家重点实验室培育基地,浙江杭州310032 [2]浙江大学化学工程与生物工程学系,浙江杭州310027

出　　处：《浙江工业大学学报》2011年第2期127-130,173,共5页Journal of Zhejiang University of Technology

基　　金：浙江省自然科学基金资助项目(Y506026)

摘　　要：在常温常压下串联酸解和碱解两大水解过程对高盐度高质量浓度有机磷农药废水如毒死蜱生产废水进行预处理,可去除废水中的绝大部分有机盐,并回收原料吡啶酚钠,同时降低废水CODcr浓度,为后续电渗析过程去除无机盐扫清障碍.环合废水先酸解后碱解,缩合废水则先碱解后酸解.研究表明:pH值是水解过程的重要影响因素.经常温常压水解处理后,环合废水与缩合废水的CODcr去除率分别达45.5%与43.5%,且吡啶酚钠盐回收率可达80%以上.Combination of acidic and basic hydrolysis processes at normal temperature and pressure was proposed to pretreat the high-salinity and high-concentration organophosphorus pesticide wastewater such as the chlorpyrifos production wastewater.This can not only remove the great majority of organic salts in wastewater and recover the material of 3,5,6-trichloropyridin-2-ol,but also reduce the CODcr concentration of wastewater,which made the electrodialytic desalination process easy.The cyclization wastewater was treated first with acidic hydrolysis and then by basic hydrolysis,while the condensation wastewater was hydrolyzed first with alkali and then with acid.The results showed that the pH of wastewater had an important impact on the hydrolyzation process.After hydralysis at normal temperature and pressure,the CODcr rejection ratios of cyclization wastewater and condensation wastewater were 45.5% and 43.5% respectively,and the recovery ratio of 3,5,6-trichloropyridin-2-ol salt in cyclization wastewater may reach 80%.

关 键 词：高含盐 高质量浓度 毒死蜱生产废水 水解 PH 

分 类 号：X703[环境科学与工程—环境工程]