Method for utilizing semiconductor membrane to process wastewater

Abstract

A method for utilizing a semiconductor membrane to process wastewater comprises the following steps: enabling waterwater to pass through a 5-mu m paper tape filter to perform primary filtering; enabling wastewater to enter a feeding circulation tank; adjusting the amount of wastewater entering the feeding circulation tank by a valve; raising the temperature of wastewater to 600 DEG C; conveying wastewater subjected to temperature raising to a semiconductor membrane unit system to perform oil-water separation; dividing wastewater into a clear liquid and a dense liquid; enabling the clear liquid to flow to a storage tank from membrane apertures of the semiconductor membrane; enabling the dense liquid to flow back to the feeding circulation tank; conveying the clear liquid into a pulse combined electrolysis apparatus and guaranteeing the clear liquid COD to be 500 mg / L or less; and discharging the clear liquid. Compared with the prior art, the method has the following technological advantages that a relatively high filtering yield can be obtained under the condition of relatively less dialysis water; water processed by employing the method is clear and transparent and is guaranteed to reach the standard; and the method is simple in operation and small in occupied area, and the processing cost is less than one-third of the processing cost of a conventional technology.

Description

technical field [0001] The invention relates to a waste water treatment process, in particular to a method for treating waste water by using a semiconductor film. Background technique [0002] At present, waste water comes from a wide range of sources, mainly from petroleum, masonry, steel, mechanical processing and other industries. Many of these wastewaters contain emulsions. O / W type emulsified particles are easily formed by the waste oil in the emulsion due to the surfactant. The particle size is less than 1 μm, and the surface is often covered with a layer of negatively charged electric double layer. The system is relatively stable and is not easy to float on the water surface. The demulsification of this wastewater and the degradation of COD are more difficult and become a more difficult problem to solve. [0003] In the treatment of emulsion, it is generally considered that "demulsification" is the key process. The demulsification methods often used at home and abr...

AI Technical Summary

Problems solved by technology

However, the ceramic membrane is limited by the material, it is difficult to adapt to temperature changes, and it is prone to breakage and damage during use.

Due to the small area of ​​the unit membrane element of the ceramic membrane, a large number of sealing rings are required in the system connection, and leakage is very easy to occur in the industrial production process

In addition, in the process of emulsion treatment using membrane technology, caustic soda is often used for cleaning and regeneration of the membrane, and the ceramic membrane substrate contains silicate components that react with caustic soda to form water glass, and long-term operation will cause serious damage to the membrane elements. destroy

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