Method for treating copper-containing printing ink wastewater

A technology of ink wastewater and treatment methods, applied in the field of industrial sewage, can solve the problems of high cost, no recycling value, high copper ion content, etc., and achieve the effect of low cost and high recycling value

Inactive Publication Date: 2021-07-23
FAIR RAYS ELECTRONICS TECH SHENZHEN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional wastewater treatment method is to use acid and alkali to neutralize coagulation and sedimentation directly in a large comprehensive collection pool, then settle through inclined tubes, and then press filter. The water that comes out is clear water quality. Return to neutral and then discharge, the cost of the traditional method is high, and the content of copper ions in the treated water is high, which does not have the value of recycling

Method used

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  • Method for treating copper-containing printing ink wastewater
  • Method for treating copper-containing printing ink wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The treatment method of this copper-containing ink wastewater comprises the steps:

[0026] S1: Filtration of ink and suspended solids: pump the pretreated copper-containing ink wastewater from the storage tank to the acidification tank at a flow rate of 150L / H, add acid until the pH is 2.5 and stir, and then stay for 30 minutes after stirring evenly, after acidification After the copper-containing ink wastewater, most of the ink and suspended matter will float on the surface. After filtering, the ink and suspended matter floating on the surface will be filtered out. Only a small part of the ink and copper-containing ink dissolved in the wastewater will be present in the wastewater. waste water;

[0027] S2: Precipitation of copper ions: the filtered pretreated wastewater is pumped into a sedimentation tank with a volume of 2 cubic meters according to the flow rate of 150L / H, and ferrous sulfate powder is added to the sedimentation tank according to the ratio of 1 kg / cu...

Embodiment 2

[0031] The treatment method of this copper-containing ink wastewater comprises the steps:

[0032] S1: Filtration of ink and suspended solids: pump the pretreated copper-containing ink wastewater from the storage tank to the acidification tank at a flow rate of 170L / H, add acid until the pH is at 2, stir, and stay for 20 minutes after stirring evenly, after acidification After the copper-containing ink wastewater, most of the ink and suspended matter will float on the surface. After filtering, the ink and suspended matter floating on the surface will be filtered out. Only a small part of the ink and copper-containing ink dissolved in the wastewater will be present in the wastewater. waste water;

[0033]S2: Precipitation of copper ions: the filtered pretreated wastewater is pumped into a sedimentation tank with a volume of 2 cubic meters according to the flow rate of 170L / H, and ferrous sulfate powder is added to the sedimentation tank according to the ratio of 0.8 kg / cubic wa...

Embodiment 3

[0037] The treatment method of this copper-containing ink wastewater comprises the steps:

[0038] S1: Filtration of ink and suspended solids: pump the pretreated copper-containing ink wastewater from the storage tank to the acidification tank at a flow rate of 200L / H, add acid until the PH is at 3 and stir, stir evenly and stay for 30 minutes, after acidification After the copper-containing ink wastewater, most of the ink and suspended matter will float on the surface. After filtering, the ink and suspended matter floating on the surface will be filtered out. Only a small part of the ink and copper-containing ink dissolved in the wastewater will be present in the wastewater. waste water;

[0039] S2: Precipitation of copper ions: the filtered pretreated wastewater is pumped into a sedimentation tank with a volume of 2 cubic meters according to the flow rate of 200L / H, and ferrous sulfate powder is added to the sedimentation tank according to the ratio of 1.2 kg / cubic wastewat...

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Abstract

The invention discloses a method for treating copper-containing printing ink wastewater, which belongs to the technical field of industrial wastewater and comprises the following steps that filtered pretreated wastewater is pumped into a sedimentation tank, ferrous sulfate powder is added into the sedimentation tank, copper ions are replaced in the wastewater by iron ions, flow-separated copper ions are formed in the wastewater, meanwhile, caustic soda flakes are added into the sedimentation tank to automatically adjust the PH value, a sulfur-containing high-molecular compound is added into the wastewater, metal ion copper reacts with the sulfur-containing high-molecular compound to be fixed, a copper sulfide solid which is not easy to dissolve in water is formed and floats in the wastewater, then a coagulant aid is added into the wastewater, electrification is carried out for neutralization and flocculation, and precipitation of floating solids is promoted. According to the method, organic matter printing ink in the copper-containing printing ink wastewater is removed through acidification, COD is degraded, a large number of copper ions in the wastewater are removed through a chemical precipitation method, the cost is low, and the generated copper-containing sludge is high in recycling value.

Description

technical field [0001] The invention relates to the technical field of industrial sewage, in particular to a treatment method for copper-containing ink wastewater. Background technique [0002] Copper is a widely distributed element in nature and one of the elements commonly used in industry. Copper is the earliest metal used by humans. In 1874, Harless pointed out that copper plays an important role in molluscs; in 1878, Ferderig extracted from the protein complex in octopus blood Copper was isolated and the protein was called ceruloplasmin. In 1928, Hart discovered that copper was an essential trace element in living organisms. Copper is widely used in both industrial and agricultural production. Copper is used in transformers, electroplating, optical instruments, and circuit boards of automotive electrical appliances such as electric power manufacturing. Copper and its copper compounds are non-degradable environmental pollutants, which can flow into the environment in l...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/20C02F101/30
CPCC02F9/00C02F2101/20C02F2101/30C02F1/66C02F1/001C02F1/5236C02F7/00C02F1/56C02F1/281C02F2301/08
Inventor 曾超文
Owner FAIR RAYS ELECTRONICS TECH SHENZHEN LTD
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