Printing wastewater purifying and reusing method

A waste water purification and waste water technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Cost, effect of reducing the amount of drug

Inactive Publication Date: 2019-06-07
安徽同和印刷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flushing process will generate a large amount of wastewater, and direct discharge will cause certain damage to environmental resources. Now, the treatment methods for printing wastewater are mostly simple treatment and direct discharge after reaching the national discharge standard, resulting in a large amount of waste of water resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for purifying and reusing printing wastewater, the method for purifying and reusing printing wastewater comprises the following steps:

[0025] (1) Waste water collection: transport the waste water generated during the printing process of the printing equipment to the waste water collection pool through the filter;

[0026] (2) Wastewater sedimentation: Put the wastewater in the wastewater collection tank to settle for 1 day, then pass it into the sedimentation tank, add a precipitant to continue the precipitation for 2 hours, and then filter the wastewater again to obtain the filtrate for use;

[0027] (3) Decolorization of wastewater: add the above filtrate to decolorizer to decolorize the wastewater. The decolorization time is 2 hours. After the decolorization is complete, the decolorized waste liquid is used for later use;

[0028] (4) Multi-stage oxidation treatment: Add the above-mentioned decolorized waste liquid to the first-level oxidant and first-leve...

Embodiment 2

[0032] A method for purifying and reusing printing wastewater, the method for purifying and reusing printing wastewater comprises the following steps:

[0033] (1) Waste water collection: transport the waste water generated during the printing process of the printing equipment to the waste water collection pool through the filter;

[0034] (2) Wastewater sedimentation: put the waste water in the waste water collection tank to settle for 2 days, then pass it into the sedimentation tank, add a precipitant to continue the precipitation for 4 hours, and then filter the waste water again to obtain the filtrate for use;

[0035] (3) Decolorization of wastewater: add the above filtrate to decolorizer to decolorize the wastewater. The decolorization time is 2-3 hours. After the decolorization is complete, the decolorized waste liquid is used for later use;

[0036] (4) Multi-stage oxidation treatment: Add the above-mentioned decolorized waste liquid to the first-level oxidant and firs...

Embodiment 3

[0040] A method for purifying and reusing printing wastewater, the method for purifying and reusing printing wastewater comprises the following steps:

[0041] (1) Waste water collection: transport the waste water generated during the printing process of the printing equipment to the waste water collection pool through the filter;

[0042] (2) Wastewater sedimentation: Put the wastewater in the wastewater collection tank to settle for 1.5 days, then pass it into the sedimentation tank, add a precipitant to continue the precipitation for 3 hours, and then filter the wastewater again to obtain the filtrate for use;

[0043] (3) Decolorization of wastewater: add the above filtrate to decolorizer to decolorize the wastewater. The decolorization time is 2.5 hours. After the decolorization is complete, the decolorized waste liquid is used for later use;

[0044] (4) Multi-stage oxidation treatment: Add the above-mentioned decolorized waste liquid to the first-level oxidant and first...

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PUM

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Abstract

The invention provides a printing wastewater purifying and reusing method, and relates to the technical field of printing wastewater treatment. The printing wastewater purifying and reusing method comprises the steps of wastewater collection, wastewater precipitation, wastewater decoloration, multistage oxidation treatment, PH adjustment and the like. By means of the printing wastewater purifyingand reusing method, the defects of the prior art are overcome, the efficiency of treating traditional printing wastewater is improved, and meanwhile, the treated wastewater can be recycled, so that water resources are saved, the producing printing cost is reduced, economic benefits are improved, and the printing wastewater purifying and reusing method is suitable for application and popularization.

Description

technical field [0001] The invention relates to the technical field of printing wastewater treatment, in particular to a method for purifying and reusing printing wastewater. Background technique [0002] Printed products can be seen everywhere in daily life. During the printing process of various printed products, printing wastewater will be generated. For example, plate printing, because there will be residues such as developer solution or impurities during the printing process, these residues will affect the printing effect, and then affect the quality of the printed product. Therefore, during the printing process, it is necessary to rinse the printed plate to remove the residue on the plate. The flushing process will generate a large amount of wastewater, and direct discharge will cause certain damage to environmental resources. Currently, the treatment methods for printing wastewater are mostly simple treatment and direct discharge after reaching the national discharge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 滕博
Owner 安徽同和印刷有限公司
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