Sewage treatment device based on electrochemistry

Abstract

The invention discloses a sewage treatment device based on electrochemistry. The sewage treatment device comprises a first filtering pool, a first pH value adjusting pool, a photocatalytic sewage treatment unit, a first settling pool used for settling and filtering suspended matters in sewage, a second pH value adjusting pool, an electrochemical sewage treatment unit, an aeration pool, an air floatation pool, a second settling pool and a second filtering pool. According to the invention, the photocatalytic sewage treatment unit is utilized to degrade organic matters; the electrochemical sewagetreatment unit is utilized to recover heavy metal ions in sewage; meanwhile, the electrochemical sewage treatment unit can also be utilized to degrade and eliminate untreated organic matters in the sewage, so the treatment pressure of the aeration pool and the air floatation pool in subsequent steps can be reduced.

Description

technical field [0001] The invention relates to the technical field of sewage treatment. Specifically, it is a sewage treatment device based on electrochemistry. Background technique [0002] With the development of social economy and the improvement of people's living standards, manufacturing enterprises generate more and more wastewater, which cannot be discharged directly, especially the wastewater generated by metal processing and manufacturing. The wastewater produced by the metal processing industry contains a large amount of heavy metal ions. If it is discharged directly, it will not cause serious pollution to the natural environment, but will also cause serious harm to humans and animals. For example, Minamata disease occurred in Minamata Bay, Japan in 1956. Because the wastewater discharged into Minamata Bay contains a large amount of methylmercury. The wastewater generated in the production process of many metal processing enterprises not only contains heavy meta...

AI Technical Summary

Problems solved by technology

However, the capacity of existing sewage treatment equipment generally focuses on one direction, such as reducing the content of organic matter in sewage and reducing the content of heavy metal ions in sewage. For sewage with relatively large content of organic matter and heavy metal ions, the two devices are usually mixed. This not only caused a sharp increase in the cost of sewage treatment equipment for enterprises, but also increased the cost of sewage treatment

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