Metal salt-converting method for treating high concentration phosphor-containing wastewater

A treatment method and high-concentration technology, applied in the direction of oxidation water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problem that the P content cannot meet the national discharge standards, and achieve the effect of low treatment and operation costs

Inactive Publication Date: 2009-05-27
TRIPOD WUXI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Neither of these two processes can make the P content in the effluent meet the national discharge standards when treating the high-concentration P-containing wastewater of chemical gold.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] On October 20, 2008, the high-concentration P-containing wastewater discharged from the chemical gold line in the workshop entered the collection tank for treatment, and the following process steps were adopted:

[0021] 1. Catalytic oxidation reaction: The PH value in the wastewater is tested to be 1.0~1.5, and the total phosphorus content is about 85~100mg / L. After the wastewater is filled with the oxidation sedimentation tank, the aeration is turned on (the amount of air blasting is 0.12M 3 / S), using temperature control and automatic dosing system to add steam and calcium hydroxide (steam addition 0.2T / M 3 , the amount of calcium hydroxide added is 0.8g / L), the temperature of the wastewater is adjusted to 30°C, and the pH value is adjusted to 2.5; according to the volume of the tank, ferrous sulfate (4.0KG / M 3 ) and hydrogen peroxide (5.5KG / M 3 ), the wastewater is fully mixed and reacted for 1 hour in the oxidation sedimentation tank, the aeration is stopped for 1...

Embodiment 2

[0025] On October 27, 2008, the high-concentration P-containing wastewater discharged from the chemical gold wire in the workshop entered the collection tank for treatment, and the following process steps were adopted:

[0026] 1. Catalytic oxidation reaction: The PH value in the wastewater is tested to be 1.0-1.5, and the total phosphorus content is about 85-100mg / L. After the wastewater is filled with the oxidation sedimentation tank, open the air (air blasting volume is 0.12M 3 / S), using temperature control and automatic dosing system to add steam and calcium hydroxide (steam addition 0.3T / M 3 , the amount of calcium hydroxide added is 1.0g / L), the temperature of the wastewater is adjusted to 35°C, and the pH value is adjusted to 3.3; according to the volume of the tank, ferrous sulfate (4.5KG / M 3 ) and hydrogen peroxide (6.25KG / M 3 ), the wastewater is fully mixed and reacted for 1 hour in the oxidation sedimentation tank, the aeration is stopped for 1.0 hour of precipit...

Embodiment 3

[0030] On November 5, 2008, the high-concentration P-containing wastewater discharged from the chemical gold line in the workshop entered the collection tank for treatment, and the following process steps were adopted:

[0031] 1. Catalytic oxidation reaction: The PH value in the wastewater is tested to be 1.0-1.5, and the total phosphorus content is about 85-100mg / L. After the wastewater is filled with the oxidation sedimentation tank, the aeration is turned on (the amount of air blasting is 0.12M 3 / S), using temperature control and automatic dosing system to add steam and calcium hydroxide (steam addition 0.4T / M 3 , the amount of calcium hydroxide added is 1.2g / L), the temperature of the wastewater is adjusted to 38°C, and the pH value is adjusted to 4.0; according to the volume of the tank, ferrous sulfate (5.0KG / M 3 ) and hydrogen peroxide (7.0KG / M 3 ), the wastewater is fully aerated and mixed for one hour in the oxidation sedimentation tank, then the aeration is stoppe...

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Abstract

The invention relates to a treatment method for chemical gold high concentration P-contained wastewater. The method is characterized in that the method comprises the following steps: lifting the wastewater from a collecting tank to an oxidation precipitation tank, opening the oxidation precipitation tank for aeration, adding steam, calcium hydroxide, ferrous sulfate and hydrogen peroxide solution into the wastewater for reaction, leading the supernatant into a subsequent physiochemical system for treatment, and pumping the precipitant into a sludge concentration tank for treatment through a sludge pump; after the catalytic oxidation reaction is completed, leading the supernatant into a physiochemical treatment neutralization tank, adding calcium hydroxide into the neutralization tank, leading the supernatant into a flocculating tank after a polyaluminium chloride reaction, adding polyacrylamide into the flocculating tank for intensive agitation, mixing and reaction, then leading the supernatant into a precipitation tank for solid-liquid separation, discharging the supernatant into the next flow, and pumping the sludge to the sludge concentration tank for treatment. A catalytic oxidation method is used to oxidize the stable hypophosphorous acid radical into the phosphate radical capable of easily reacting with metallic salts and producing precipitant; and then a physiochemical method is used to precipitate and remove the phosphate radical, thereby enabling the P content in the outputted water to reach the state emission standard.

Description

technical field [0001] The invention relates to a treatment method for high-concentration P-containing wastewater of chemical gold, in particular to the treatment of P in high-concentration gold chemical wastewater, and belongs to the technical field of sewage treatment. Background technique [0002] The chemical gold process section in the PCB industry will produce a large amount of high-concentration P-containing wastewater. This type of wastewater contains hypophosphite radicals that are difficult to remove by ordinary wastewater treatment processes. The up-to-standard discharge of wastewater has seriously affected the development of the industry. [0003] The high-concentration P-containing wastewater of chemical gold refers to the wastewater generated during the process of depositing nickel ions in the chemical solution on the copper surface that has been catalyzed by palladium metal to form a nickel layer (including nickel chemical, washing after nickel chemical, etc.)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58C02F9/04C02F1/72C02F1/52
Inventor 魏明磊董学涛史来勇刘丽川
Owner TRIPOD WUXI ELECTRONICS
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