Colorant wastewater treatment agent and colorant wastewater treatment method

Abstract

The invention discloses a dye penetrant inspection wastewater treatment agent, which is prepared from the following components in parts by weight: 2 to 4 parts of peroxide, 0.2 to 0.4 part of soluble ferrous salt and 0.8 to 3 parts of aluminum salt, wherein the peroxide is selected from any one or two of magnesium peroxide, zinc peroxide, calcium peroxide and sodium peroxide; the soluble ferrous salt is any one or more of ferrous sulfate, ferrous chloride and ferrous nitrate; and the aluminum salt is one or two of aluminum chloride or aluminum sulfate. According to the invention, a Fenton system is formed by .OH generated by the reaction of peroxide and water and the ferrous salt, COD in the dye penetrant inspection wastewater is removed, and the peroxide, the ferrous salt and the aluminum salt in the components of the treatment agent for the dye penetrant inspection wastewater are all solids, so that the treatment agent is convenient to store and low in cost. The invention also discloses a method for treating colorant wastewater by using pickling wastewater, which utilizes the pickling wastewater generated in the inspection and maintenance process of metal workpieces to treat wastes with wastes and reduce the waste treatment cost.

Description

Technical field [0001] The present disclosure relates to a colorant wastewater treatment agent and a colorant wastewater treatment method. Background technique [0002] When there is defects or cracks in metal parts and equipment, it will affect its service life, which will also cause a certain safety hazard. Therefore, it is necessary to do diagnosis of loss, coloring penetration flaw is a simple and effective test method. The basic principle is to utilize capillaries to penetrate the permeate into defects, and the surface osmosis is removed, while the penetration residual residue in the defect, the purpose of adsorbing the residual permeation in the defect with the capillary action of the developer. The basic operation process is: coating the red penetrating agent in a metal part or device, if there is a defect, in the capillary, red penetrant penetrate into the defect, then remove excess red penetrant on the inspection surface, and then Applying a layer of imaging agent, the p...

AI Technical Summary

Problems solved by technology

Using this method to inspect metal parts and equipment will produce a large amount of waste liquid, and because the waste liquid contains red penetrant and imaging agent, it appears red, has high turbidity, and contains a large amount of organic matter. The chemical oxygen demand (hereinafter referred to as COD) is about 2000mg / L. The wastewater has low biodegradability and lacks nutrients such as nitrogen and phosphorus. When it is treated with biological treatment methods such as activated sludge method and biological contact oxidation method, the effluent High COD, difficult to meet emission standards