Waste water treatment electrolytic apparatus and method

Abstract

The present invention is characterized by that on the bottom of reactive tank an anode is set, a compound gas diffusion electrode is used as cathode, and placed over the anode, and on the anode the air intake pipes with aeration microporous structure are distributed, and the catalyst is distributed between the diffision electrode and anode. The electrolysis process is implemented at normal temp. and normal pressure, and D.C. voltage of 3-20 V is applied, and the proper current density and gas diffusion density are controlled. Said invention adopts the compound gas diffusion electrode as cothode of electrolysis process, and utilizes the diffusion action of oxygen gas or air, etc. to reduce energy consumption for reaction, so that it has the advantages of stable operation, low cost, long service life of equipment and good treatment effect.

Description

Technical field: [0001] The invention relates to an electrolysis device and method for wastewater treatment, belonging to the technical field of water treatment. Background technique: [0002] With the development of industry, production wastewater has become one of the main sources of water pollution. Some industrial wastewater is difficult to treat, such as dye wastewater. This type of wastewater has complex components, including organic dyes, deep color, high concentration of aromatic organic substances, strong toxicity, refractory degradation (low BOD / COD), large pH fluctuations, large component changes, and large water volume. At present, there are coagulation and biochemical methods commonly used to treat this kind of wastewater at home and abroad. The coagulation method has a poor removal rate for soluble dyes and other soluble N and P compounds in water. The microorganisms used in the biochemical method have certain requirements on nutrients, pH, temperature and o...

AI Technical Summary

Problems solved by technology

However, electrochemical methods generally have the disadvantages of high energy consumption, high cost, and side reactions such as oxygen evolution and hydrogen evolution, which limit the practical application range of wastewater treatment.

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