焦亚硫酸钠法保险粉生产废水的预处理工艺
2016-01-15周玉红,伊学农,王俊超等
焦亚硫酸钠法保险粉生产废水的预处理工艺
周玉红1,伊学农2,王俊超2,王玉琳2
(1. 安阳九久化学科技有限公司,河南安阳455100;2.上海理工大学环境与建筑学院,上海200093)
摘要采用微电解、芬顿、微电解-芬顿、芬顿-微电解四种工艺对焦亚硫酸钠法保险粉生产废水进行预处理试验。结果表明芬顿或芬顿与微电解组合工艺处理效果较佳,尤其是微电解-芬顿组合工艺效果最好;组合工艺的最佳参数: 微电解初始pH为3.5,反应时间为2 h;芬顿初始pH为4,30%的H2O2投加量为40 mL/L,H2O2/Fe2+物质的量比为3∶1,反应时间为1 h。在此条件下,TOC去除率为43.8%,B/C比从0.13提高至0.21。GC-MS谱图表明去除的有机物主要有多烯烃、单烯烃、硅醇烃类。
关键词保险粉生产废水焦亚硫酸钠法微电解芬顿氧化预处理
中图分类号:X703.1文献标识码: A
[收稿日期]2015-06-06
[作者简介]周玉红(1984—),女,助理工程师,学士,研究方向为化学工程与工艺。电话: 18625820651;E-mail: zhouyuhong1020@163.com。
[通讯作者]伊学农,电话: 13761080299;E-mail: jackyixn@126.com。
Pretreatment Process of Production Wastewater of Sodium Hydrosulfite Produced from Sodium Pyrosulfite Method
Zhou Yuhong1, Yi Xuenong2, Wang Junchao2, Wang Yulin2
(1.AnyangChemicalIndustryLimitedLiabilityCompany,Anyang455100,China;
2.SchoolofEnvironmentandArchitectureEngineering,UniversityofShanghaiforScienceandTechnology,Shanghai200093,China)
AbstractThe processes such as microelectrolysis, Fenton, microelectrolysis-Fenton and Fenton-microelectrolysis were used to treat wastewater of sodium hydrosulfite produced from sodium pyrosulfite method in this paper. The results show that the process of Fenton or Fenton combined microelectrolysis has better treatment effect, especially the process of microelectrolysis-Fenton. The removal rate of TOC is up to 43.8% under the optimal conditions, which are as follows: initial pH of microelectrolysis is 3.5, reaction time is 2 h; initial pH of Fenton is 4, dosage of 30 %H2O2is 40 mL/L, H2O2 / Fe2+molar ratio is 3, reaction time is 1 h. Then ratio of B/C reaches from 0.13 to 0.21. GC-MS spectra shows organics such as olefins, polyene and silanol are removed mainly.
Keywordssodium hydrosulfiteproduction wastewatersodium pyrosulfite methodmicroelectrolysisFenton oxidationpretreatment

保险粉学名连二亚硫酸钠,是一种强还原剂,在纺织工业中作为助染剂及漂白剂,在食品医药造纸等行业中作为漂白剂等[1-3],其生产废水中除含有生产原料外,还包括甲酸钠、二氧化硫、甲醇、焦亚硫酸钠及环氧乙烷等。有关该类废水的处理,普遍采用两种方法: (1)分步回收;(2)先焚烧,后生化处理的方法。这两种方法中废水处理装置投资大,运行费用高,令中、小型企业难以承受[4]。
Fenton氧化法属于高级氧化技术,通过向废水中投加H2O2,以Fe2+作催化剂,产生具有强氧化性的·OH来氧化降解废水中的有机物[5-7]。微电解法(也叫内电解法)是在废水中投加铁屑和活性炭(或焦炭)形成无数微小原电池,利用原电池所产生的新生态[H]、Fe2+与污染物发生还原反应,从而实现对污染物的去除[8,9]。……
