Banknote printing gravure ink wastewater treatment process

Abstract

The invention provides a banknote printing gravure ink wastewater treatment process, and belongs to the field of hazardous wastewater treatment. The wastewater treatment process comprises the following steps: a raw material storage and conveying process, a wastewater pretreatment process, a pretreated wastewater transiting process, a solid-liquid separation process, a wastewater final post-treatment process and a post-hazardous wastewater treatment process. The ink wastewater solid residues treated by the method basically do not contain water, and are treated as hazardous wastes, the volume and mass are greatly reduced, the treatment cost is reduced therefore, leakage during the transportation process is prevented, the environment is protected, and the safety is guaranteed. The SS contentof the treated filtrate is low, various indexes are reduced, and the processed wastewater can be discharged into a factory water treatment master station. The separated liquid meets the discharge requirements, added calcium chloride reduces the content of chloride ions in water, the corrosion to equipment is reduced, the environment is not polluted, the pH value of the treated liquid is reduced, the COD is reduced, and the subsequent water treatment cost is also reduced.

Description

technical field [0001] The invention belongs to the technical field of hazardous waste sewage treatment, and in particular relates to a process for treating banknote printing gravure printing ink wastewater. Background technique [0002] At present, the closest existing technology: With the increasingly severe domestic environmental protection, the requirements for wastewater treatment are getting higher and higher. The concentrated waste liquid mainly contains ink components, with a solid content of 8%-13%. Since the waste liquid is strongly alkaline and contains surfactants, the ink is extremely stable in the waste liquid and is not easy to be disposed of. Its high PH, COD, NH3-N, Tp, etc. can not achieve rapid solid-liquid separation with traditional treatment processes and methods, the separated liquid can be discharged, and the solid residue can basically contain no water. [0003] In recent years, environmental protection requirements have become more and more stringe...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above technical problems, the present invention provides a waste water treatment process for banknote printing gravure printing ink to solve the problem that the separated liquid cannot meet the discharge requirements in the existing waste water treatment process, and open-top stacking causes serious air pollution and high labor intensity. Unable to guarantee its normal production and the high cost of hazardous waste treatment in the later stage, a banknote printing gravure printing ink wastewater treatment process specifically includes the following steps:

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