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Water-based ink wastewater treatment process

A treatment process, water-based ink technology, applied in the direction of water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of not very good effect, high treatment cost, high chroma of COD value and other problems, to achieve the effect of high chroma removal rate and COD removal rate, high production and application value, and reduced treatment cost

Inactive Publication Date: 2015-04-08
SUZHOU ZHONGYA INK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Water-based ink will produce a lot of sewage in the process of production and application. The main components of these sewage are acrylic resin, hydrophilic pigments and some other additives, so water-based ink sewage has a higher COD value and higher chroma , if discharged directly into the environment, it will cause serious environmental pollution
At present, in the treatment of water-based ink sewage, the effect of some conventional methods is not very good, and the treatment cost is high and the treatment is difficult. Especially for the treatment of sewage chroma, commonly used biological methods are difficult to degrade

Method used

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  • Water-based ink wastewater treatment process

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Effect test

Embodiment 1

[0018] The specific processing method is as follows:

[0019] a) Pretreatment of ink sewage, because the water-based ink sewage contains a large amount of acrylic resin, which is very hydrophilic and is particularly sensitive to pH, so first neutralize the ink sewage with a certain amount of hydrochloric acid, and put The pH value of the sewage is adjusted to 3.5; then the sewage is left to stand at room temperature of 20°C for 2 hours, so as to separate the suspended colloidal substances in the sewage and reduce the waste residue content in the sewage. According to the actual test, the COD value of the pretreated ink sewage can be reduced to 900mg / L, and the chroma can be reduced by about 150 times.

[0020] b) Activation treatment of waste cast iron chips, first wash the waste cast iron chips with a certain amount of 10% sodium hydroxide solution to remove the oil on the surface of the waste cast iron chips; then soak the waste cast iron chips with a certain amount of 3% hyd...

Embodiment 2

[0024] The specific processing method is as follows:

[0025] a) Pretreatment of ink sewage, because the water-based ink sewage contains a large amount of acrylic resin, which is very hydrophilic and is particularly sensitive to pH, so first neutralize the ink sewage with a certain amount of hydrochloric acid, and put The pH value of the sewage is adjusted to 4; then the sewage is left to stand at room temperature of 20°C for 3 hours, so as to separate the suspended colloidal substances in the sewage and reduce the waste residue content in the sewage. According to the actual test, the COD value of the pretreated ink sewage can be reduced to 800mg / L, and the chroma can be reduced by about 150 times.

[0026] b) Activation treatment of waste cast iron chips, first wash the waste cast iron chips with a certain amount of 10% sodium hydroxide solution to remove the oil on the surface of the waste cast iron chips; then soak the waste cast iron chips with a certain amount of 3% hydro...

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Abstract

The invention provides a water-based ink wastewater treatment process which uses micro electrolysis method and comprises the following steps: a) ink wastewater pretreatment, b) activation treatment of waste cast iron chip, c) micro electrolysis treatment of ink wastewater and d) neutralization and precipitation. The water-based ink wastewater treatment process is simple in operation, the chroma removing rate and COD removal rate of the ink wastewater are very high, the processing cost is greatly reduced by treating wastes by use of waste, and the process has the very high application value.

Description

technical field [0001] The invention relates to a treatment process, in particular to a water-based ink sewage treatment process, which belongs to the technical field of ink. Background technique [0002] Ink is an important material for printing. It expresses patterns and characters on the substrate through printing. Ink is generally composed of pigments, binders, solvents and additives. These components are evenly mixed and rolled repeatedly to form a viscous colloidal fluid. Ink is widely used in various printings such as books, periodicals, packaging and decoration, architectural decoration, etc. With the increase of social demand, the variety and output of ink have also expanded and increased accordingly. Water-based ink is a new type of green printing material. It uses water as a solvent and contains very little organic solvent. It has the characteristics of non-flammability, no residue, and no harm to the human body, so it is widely used in the printing industry. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06
CPCC02F9/00C02F1/461
Inventor 张东明
Owner SUZHOU ZHONGYA INK
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