High-concentration cymoxanil wastewater treatment system and method

Abstract

The invention provides a high-concentration cymoxanil wastewater treatment system and a high-concentration cymoxanil wastewater treatment method using the system. The system comprises a cymoxanil wastewater oxidizer, a micro-interface generator, an evaporation unit 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 a 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 cymoxanil wastewater to form a gas-liquid mixture, the contact area of a gas phase and a liquid phase is increased, the cymoxanil wastewater is fully oxidized and decomposed under a relatively low preset condition, the treatment effect of the high-concentration cymoxanil wastewater is optimized, meanwhile, as no catalyst is used, the treatment cost of the high-concentration cymoxanil wastewater is reduced.

Description

technical field [0001] The present invention generally relates to the field of pesticide wastewater treatment, and more specifically relates to a treatment system and method for high-concentration cymoxanil wastewater. Background technique [0002] Cymoxanil is a high-efficiency fungicide with systemic effect, and it can increase the residual activity when mixed with protective fungicides. It is effective against Peronospora fungi (Phytophthora, Peronospora, and Plasmopara). Cymoxanil production wastewater contains complex components such as chloroacetic acid, hydroacetic acid, acetic acid, sodium chloride, ethyl urea, cyanoacetyl ethyl urea, sodium methoxysulfonate, cymoxanil, among which COD CR The mass concentration value is as high as 100,000-300,000 mg / L, and the salt content is large, the color is large, and it is difficult to directly biodegrade. [0003] Catalytic wet oxidation treatment of cymoxanil wastewater is relatively economical and can achieve ideal treatme...

AI Technical Summary

Problems solved by technology

[0006] 1. During the contact process between air or oxygen and liquid phase wastewater, the gas and liquid are mixed to produce larger and more bubbles. Due to the large number of bubbles, the gas and liquid cannot be fully mixed, resulting in the oxidation of macromolecular organic matter in the wastewater The efficiency of decomposition is low, and the oxidative decomposition is not sufficient, resulting in poor treatment effect of high-concentration cymoxanil wastewater

[0007] 2. The application amount of catalyst is relatively large, resulting in high cost of treatment of high-concentration cymoxanil wastewater

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