System and method for degrading biotoxicity in wastewater

Abstract

The invention discloses a system and method for degrading biotoxicity in wastewater. The system comprises a storage system, a collection tank, an electrochemical reaction system, a buffer tank and a biochemical treatment system, wherein the electrochemical reaction system comprises an electrochemical reactor and a PLC control device; the electrochemical reactor comprises a water inlet, a water outlet, a water distribution chamber, a water outlet chamber, an overflow port and a plurality of reaction chambers; electrodes are arranged in the reaction chamber; a part of the electrodes are Ti / Ru series electrodes, and the rest of the electrodes are Ti / Ir electrodes; the Ti / Ru series electrodes and the Ti / Ir electrodes are separately connected with PLC control equipment; and the PLC control equipment is used for controlling the anodic-cathodic switching of two electrodes during an electrochemical reaction. The system of the invention is good in bactericide wastewater treatment effect, realizes automatic operation in the whole process, and effectively overcomes the defects of low treatment efficiency, high operation cost, and generation of solid waste and VOC pollution in the prior art.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a system and method for degrading biological toxicity in wastewater. Background technique [0002] In recent years, the proportion of the production and usage of fungicides has gradually increased. In fungicides (such as dyson, methoxyacrylates, cymoxanil, difenoconazole, thiacloprid, pyrimethanil, etc.) The mother liquor wastewater produced in the production process has the characteristics of high organic matter and high salt, low biodegradability and certain biological toxicity, and is not easy to be biodegraded. After the mother liquor wastewater is separated and desalinated through a certain pretreatment process, the distilled water still needs to be further treated to meet the requirements of biochemistry. [0003] At present, the pretreatment methods for degrading fungicide wastewater include adding oxidizing agents, adsorbent adsorption, micro-ele...

AI Technical Summary

Problems solved by technology

This method has the following defects: 1) The cathode uses Ti electrodes, the wastewater components are complex, and the electrode surface is prone to passivation problems; 2) The fixed cathode and anode and the anion and yang chamber have dead ends in the reactor, which cannot ensure uniform reaction, and the operation is relatively complicated; 3) The ion-exchange membrane is a consumable, resulting in secondary pollution; 4) There is no waste gas collection and treatment system

This method has the following defects: 1) The cathode uses a stainless steel plate electrode, and the cathode and anode are fixed, and the electrode surface is prone to corrosion and passivation problems; 2) Additional Fenton agents and ion electrodes need to be added, resulting in secondary pollution; 3) The use of The aeration method mixes the wastewater and produces a large amount of waste gas, and there is no waste gas collection and treatment system

This system still has the problems of fixed cathode and anode, the need to add ion electrodes, the use of aeration to mix wastewater, and no waste gas collection and treatment devices.

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