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Method for treating phosphorus/phosphine-containing electroplating wastewater

A technology for electroplating wastewater and treatment methods, which is applied in metallurgical wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., and can solve the problems of non-consideration, little consideration of phosphorus/phosphonate removal, total phosphorus exceeding the standard and other issues, to achieve the effect of reducing production, reducing sludge production and chemical dosage, and reducing treatment costs

Active Publication Date: 2015-06-10
石泰山
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the emphasis on the removal of heavy metal ions, the removal of phosphorus / phosphonate is often not considered or rarely considered, and there is a possibility that the heavy metal ions in the wastewater meet the standards but the total phosphorus exceeds the standard

Method used

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  • Method for treating phosphorus/phosphine-containing electroplating wastewater
  • Method for treating phosphorus/phosphine-containing electroplating wastewater
  • Method for treating phosphorus/phosphine-containing electroplating wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Example 1 (see figure 1 )

[0026] Classified collection, acid copper electroplating wastewater and pyrophosphate electroplating wastewater are combined and collected in the copper-containing wastewater collection tank, and chromium-containing electroplating wastewater, chemical nickel, phosphine-containing electroplating wastewater, and pre-treatment wastewater are collected separately.

[0027] Chromium-containing electroplating wastewater is pumped into the hexavalent chromium reduction reaction tank after adjusting the water quality and quantity in the chromium-containing electroplating wastewater collection tank. One or more of copper electroplating wastewater, chemical nickel wastewater, phosphine-containing electroplating wastewater, etc.), plus a solution of lime milk or alkaline substances such as sodium hydroxide or sodium carbonate to adjust the pH value to 6.5 ~ 11.5, add polychlorinated After the aluminum / polyacrylamide coagulation / flocculation reaction, t...

Embodiment 2

[0029] Example 2 (see figure 2 )

[0030] Mixed collection, coke copper electroplating wastewater, acid copper electroplating wastewater, chromium-containing electroplating wastewater, phosphine-containing electroplating wastewater, chemical nickel wastewater, and phosphine-containing electroplating wastewater are combined and collected in the chromium-containing wastewater collection tank.

[0031] The mixed electroplating wastewater collected by mixing is pumped into the hexavalent chromium reduction reaction tank (secondary reduction) after adjusting the water quality and quantity in the chromium-containing wastewater collection tank. Sodium carbonate and other alkaline substances adjust the pH value to 6.5~11.5. After adding polyaluminum chloride / polyacrylamide for coagulation / flocculation, the wastewater flows into the sedimentation tank for sedimentation, the supernatant flows into the comprehensive wastewater collection tank at night, and the sludge in the sedimentatio...

Embodiment 3

[0033] Example 3 (see image 3 )

[0034] Acid copper electroplating wastewater and chromium-containing electroplating wastewater are collected in the chromium-containing wastewater collection tank, and phosphorus / phosphine-containing wastewater is mixed and collected in the phosphorus / phosphorus-containing electroplating wastewater collection tank (such as coke copper electroplating wastewater, chemical nickel wastewater, phosphorus-containing electroplating wastewater Wait). The phosphorus / phosphine-containing electroplating wastewater is pumped into the oxidation tank, and an oxidant such as sodium hypochlorite solution or hydrogen peroxide or ozone is added to react, and the redox potential is controlled to 450mV ~ 750mV. Phosphorus / phosphine-containing electroplating wastewater is discharged into the chromium-containing wastewater collection tank after oxidation pretreatment.

[0035] The wastewater in the collection tank of chromium-containing wastewater is pumped into t...

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Abstract

The invention discloses a method for treating phosphorus / phosphine-containing electroplating wastewater and relates to electroplating wastewater treatment. The method comprises the following steps: collecting the phosphorus / phosphine-containing electroplating wastewater, chromium-containing electroplating wastewater and acid copper electroplating wastewater in a wastewater collection pool, and performing mud-water separation. The general acid / base in the electroplating wastewater is fully utilized, calcium / magnesium / iron / aluminum and other metal ions needing to be added in the conventional electroplating wastewater treatment can be replaced by heavy metal ions contained in the electroplating wastewater, and total phosphorus in the phosphorus / phosphine-containing electroplating wastewater is removed. The addition amount of metal salt / base in electroplating wastewater treatment can be reduced, the sludge yield and dosage are reduced, the dissolved solids in the wastewater are obviously reduced, the generation amount of electroplating sludge is reduced, the sludge is low in moisture content and is easily subjected to filter pressing, the treatment cost of the electroplating wastewater is reduced, the environmental pollution is reduced, the wastewater recycling rate is improved, the sludge can be reduced by 25-50 percent, and the treatment cost can be reduced by about 25-50 percent.

Description

technical field [0001] The invention relates to the treatment of electroplating wastewater, in particular to a method for treating phosphorus / phosphine-containing electroplating wastewater. Background technique [0002] Electroplating wastewater treatment emphasizes the removal of heavy metal ions while ignoring the removal of anions, especially coordination anions, in electroplating wastewater. [0003] The hydroxide precipitation method is a common method for the treatment of electroplating wastewater, and the common treatment processes are the mixed treatment process and the quality separation treatment process. The mixed treatment process is to collect cyanide-containing electroplating wastewater and hexavalent chromium-containing electroplating wastewater separately, and mix it with other heavy metal-containing electroplating wastewater after oxidation and reduction. The pH value of the optimum precipitation is different, and multi-stage reaction and multi-stage precip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/10C02F101/30C02F103/16
Inventor 石泰山
Owner 石泰山
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