Glyphosate production wastewater treatment system and method

Abstract

The invention provides a glyphosate production wastewater treatment system and a glyphosate production wastewater treatment method using the system. The glyphosate production wastewater treatment system comprises a glyphosate wastewater oxidizer, a micro-interface generator, a primary filtration sedimentation tank and the like; oxygen is broken through a micro-interface generator to form micron-sized bubbles, the micron-sized bubbles have physicochemical properties which conventional bubbles do not have, and it can be known from a calculation formula of the volume and the surface area of the sphere that the total surface area of the bubbles is inversely proportional to the diameter of a single bubble under the condition that the total volume is not changed; therefore, the total surface area of the micron-sized bubbles is huge, so that the micron-sized bubbles are mixed with the glyphosate wastewater to form a gas-liquid mixture, the contact area of the gas phase and the liquid phase is increased, the glyphosate wastewater is fully oxidized and decomposed under a relatively low preset condition, and the industrialization difficulty of glyphosate production wastewater treatment is effectively reduced.

Description

technical field [0001] The present invention generally relates to the field of pesticide wastewater treatment, and more particularly relates to a treatment system and method for glyphosate production wastewater. Background technique [0002] Glyphosate, as an efficient and low-toxic herbicide, has been widely used in current agricultural production. Its chemical name is N-phosphine carboxymethyl glycine, also known as Zhencao Ning, phosphoglycine. At present, the domestic production capacity of glyphosate is about 600,000 t / year, and it is still growing at a rapid growth rate of 10% per year. The main production processes of glyphosate are DIA method and dimethyl ester method. According to statistics, every 1 ton of glyphosate is produced The glyphosate produced in this process produces about 4.5t of glyphosate mother liquor and 10 to 12t of phosphorus-containing wastewater, and the wastewater has high organic content, salt content, COD, etc., and is difficult to degrade. ...

AI Technical Summary

Problems solved by technology

The treatment methods for glyphosate wastewater include oxidation method, precipitation method, resin adsorption method, micro-electrolysis method and biological method, among which the pressurized air or oxygen oxidation method is carried out at a temperature above 200°C and strong acid conditions by feeding air or oxygen Oxidative decomposition reaction decomposes macromolecular organic matter in glyphosate wastewater, most of organic phosphorus is oxidized to phosphoric acid and its salts, the treatment effect is good, and the cost of oxidant is low, but this method has high requirements for equipment, high pressure and high temperature , strong acidity, high energy consumption, and difficult industrialization

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