基于微波-fenton法处理草甘膦废水工艺技术研究

发布时间：2018-04-15 06:27

本文选题：草甘膦 + 氧化降解　；参考：《山东大学》2015年硕士论文

【摘要】：草甘膦是一种高效、低毒、安全的广谱除草剂,内吸、传导性能优良,是当前使用剂量最大的除草剂产品。草甘膦的生产废水具有排放量大、污染物浓度高、含盐量高、难降解化合物含量高和治理难度大等问题,这些残留液体或者难降解的产物对环境造成了极大的危害,对人们的正常生产和生活构成了严重的威胁。根据草甘膦的生产工艺,当前的草甘膦废水处理工艺主要是采用浓缩除盐后配置成10%的草甘膦水剂通过水解、沉淀等物理方法进行处理,极易产生大量含有机杂质的结晶盐而造成土壤粘滞的问题,同时这些传统的处理工艺存在反应回收率和纯度较低、处理成本较高的问题。因此,探索高效节能的组合处理工艺实现草甘膦有效处理是本论文的关键问题也是主要研究内容之一。本文对传统的氧化沉淀等草甘膦废水处理工艺进行了系统全面的梳理,针对济南市某农药生产厂家草甘膦生产废水排放量大、成分复杂、COD质量浓度高,普通生化方法难以降解等的问题,研究分析利用微波辐照-fenton试剂协同处理草甘膦生产废水的工艺流程和装置,确定最佳实验条件和工艺流程。主要开展如下工作：(1)针对不同企业草甘膦生产工艺的特点,进一步处理浓缩液,通过氧化法降解滤液中的亚磷酸,有效降低剩余溶液中COD和总磷的浓度,通过结晶将草甘膦从废水中分离提取,通过添加Ca(OH)2的方法结晶剩余滤液,将磷转化成磷酸钙盐以待进一步利用。(2)通过对济南市某农药生产厂家产生的草甘膦生产废水进行fenton试剂-混凝处理,探讨fenton试剂和混凝法处理济南市某农药生产企业在草甘膦生产过程中产生的废液的处理工艺和技术,分析在fenton试剂和混凝法处理草甘膦废水过程中的影响因素,通过正交实验确定最佳实验条件和工艺流程。(3)研究微波辐照-fenton试剂协同方法处理草甘膦废水过程中各种影响因素对降解效果的影响,进而确定最佳反应条件,最终构建大规模推广的中试处理系统,并考察中试试验效果,确保经过处理的草甘膦废水达到了济南市工业废水排放标准。(4)通过对合成草甘膦处理工艺的实际运行结果验证本文提出的草甘膦处理方法的效率,跟踪处理效果,进而为大规模工厂化实施奠定基础。
[Abstract]:Glyphosate is a kind of high efficiency, low toxicity, safe broad-spectrum herbicide with good internal absorption and good conductivity.The wastewater from glyphosate production has many problems, such as large discharge, high pollutant concentration, high salt content, high content of refractory compounds and difficult to treat. These residual liquids or refractory products have caused great harm to the environment.It poses a serious threat to the normal production and life of people.According to the production process of glyphosate, the current treatment process of glyphosate wastewater is mainly treated by physical methods such as hydrolysis, precipitation and so on.It is easy to produce a large amount of crystalline salt containing organic impurities and cause the problem of soil viscosity. At the same time these traditional treatment processes have the problems of low reaction recovery and purity and high treatment cost.Therefore, it is the key problem and one of the main research contents to explore the combination treatment process of high efficiency and energy saving to realize glyphosate effective treatment.In this paper, the traditional treatment process of glyphosate wastewater, such as oxidation and precipitation, is systematically and comprehensively combed. The wastewater from glyphosate production in a pesticide factory in Jinan has a large amount of discharge and a high concentration of COD with complex composition.The common biochemical methods are difficult to degrade. The technological process and equipment for the synergistic treatment of glyphosate wastewater by microwave irradiation with fenton reagent are studied and the optimum experimental conditions and technological process are determined.The main work is as follows: (1) according to the characteristics of glyphosate production process in different enterprises, the concentrated solution is further treated, the phosphorous acid in the filtrate is degraded by oxidation, and the concentration of COD and total phosphorus in the remaining solution is effectively reduced.Glyphosate was separated and extracted from wastewater by crystallization, and residual filtrate was crystallized by adding Ca(OH)2.Conversion of phosphorus to calcium Phosphate to be further utilized. Treatment of glyphosate wastewater produced by a pesticide manufacturer in Jinan by fenton reagent coagulation.This paper discusses the treatment process and technology of waste liquid produced in glyphosate production process in a pesticide production enterprise in Jinan by fenton reagent and coagulation method, and analyzes the influencing factors in the treatment of glyphosate wastewater by fenton reagent and coagulation method.The optimum experimental conditions and technological process were determined by orthogonal experiment.) the effects of various factors on the degradation of glyphosate wastewater treated by microwave irradiation-fenton reagent synergistic method were studied, and the optimum reaction conditions were determined.Finally, the pilot-scale pilot treatment system was constructed, and the effect of the pilot test was investigated.To ensure that the treated glyphosate wastewater meets the discharge standard of industrial wastewater of Jinan City, the efficiency of the method proposed in this paper is verified by the actual operation results of synthetic glyphosate treatment process, and the effect of the treatment is tracked.And then lay the foundation for the implementation of large-scale factory.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X786

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