A Study Towards Treatment Of Glyphosate Waste Water Based On Microwave-fenton Technology

Glyphosate is a kind of broad spectrum herbicide, which has high efficiency, low toxicity, safety, inner-absorption and transport properties, and has the biggest production and use currently in the world. The production scale of glyphosate has been on the rise in recent years, the main production method of glyphosate production is method IDA and glycine according to the sources of the raw materials. The production waste-water of glyphosate which has high concentration of pollutants, high salinity, high content of persistent compounds and large discharge is toxic and difficult to dispose, it caused great harm to the environment because of its difficult disposing, and posed a serious threat to people’s normal production and life. The production process of glyphosate will produce large amounts of waste water, which has great difference, but have a common characteristic that the salt content and phosphorus content is relatively high, according to the different production processes. The physical degradation method adopting that concentration after desalting configured 10% glyphosate is the main treatment method currently according to the production process of glyphosate, which easily producing the result that a large number of crystal salt containing organic impurities caused by viscous soil problems exist at the same time. Therefore, the combination treatment process to explore efficient and effective treatment of glyphosate is one of the key issue of this paper in this research.The systematical and overall grooming is applied based on traditional oxidation treatment of glyphosate waste-water process in this paper, aimed at the main problem and shortcomings in treatment process, such as large amount of discharge, complex composition, high COD concentration, hard to degrading by common biochemical methods. The method of microwave irradiation and fenton reagent to deal with glyphosate production wastewater process and device is researched in this paper, and the optimal experimental conditions and process flow is determined finally. The main work of this paper is as follows:(1) According to the characteristics of different enterprises of glyphosate production process, further processing of concentrated liquid, through the oxidation of phosphite in the filtrate, effectively reduce the concentration of COD and TP in the residual solution, reduce environmental pollution; under appropriate conditions, the separation and extraction of glyphosate from wastewater by crystallization, by adding Ca (OH) 2 crystallization method of residual filtrate P, will be converted to calcium phosphate for further use.(2) Through the treatment of glyphosate wastewater used the fenton reagent in Jinan pesticide production enterprises, to discuss affection of the fenton reagent in treatment of glyphosate wastewater. The effects of various factors on the degradation process with fenton reagent and coagulation process were analyzed in order to determine the optimum reaction conditions, and then the orthogonal experiment method was applied to determine the optimum experiment conditions.(3) To study the effect of various factors on the degradation of glyphosate wastewater by microwave irradiation-fenton reagent, and then determine the optimum reaction conditions, and finally construct the pilot scale test system, and investigate the effect of the pilot test, and ensure the treatment of glyphosate wastewater reached the Jinan industrial wastewater discharge standard.(4) Throughout the analysis of result real operation of the synthesis of glyphosate treatment process, shows that the efficiency of the method put forward in this paper, to build the foundation of large-scale industrializing according to the treatment effect tracking.