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Method for treating galvanization sewage

A treatment method and technology for sewage, which are applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, metallurgical wastewater treatment, etc. The effect of content and COD

Active Publication Date: 2014-07-30
SUZHOU GANNZ ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Technical problem to be solved: After galvanized sewage is treated by conventional treatment methods, the content of zinc ions is less reduced, the reduction of chemical oxygen consumption is limited, and the discharge will still seriously pollute the environment.

Method used

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  • Method for treating galvanization sewage

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Experimental program
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Effect test

Embodiment 1

[0008] (1) drop into ferrous sulfate and ferric chloride in galvanized sewage, the addition of ferrous sulfate is 3.7wt% of sewage weight, the addition of ferric chloride is 0.6wt% of sewage weight; (2) After adding ferrous sulfate and ferric chloride flocculants, the sewage is subjected to ultrasonic treatment, the ultrasonic power is 1200w, and the ultrasonic time is 40min; (3) After the ultrasonic is finished, stand for clarification, remove the bottom sediment, and obtain galvanized sewage (4) Pass the supernatant of the galvanized sewage after ultrasonic and flocculation through the D751 chelating ion exchange resin, the weight ratio of the loading amount to the D751 resin is 5:1, and the loading flow rate is 1.8BV / h; (5) collect the exchanged sewage effluent, and then pass it through SP825 macroporous adsorption resin, the weight ratio of sample loading to SP825 macroporous adsorption resin is 4:1, and the sample loading flow rate is 1.4BV / h; (6) Finally, the treated ga...

Embodiment 2

[0010] (1) drop into ferrous sulfate and ferric chloride in galvanized sewage, the addition of ferrous sulfate is 3.3wt% of sewage weight, the addition of ferric chloride is 1.2wt% of sewage weight; (2) After adding ferrous sulfate and ferric chloride flocculant, the sewage is subjected to ultrasonic treatment, the ultrasonic power is 1000w, and the ultrasonic time is 40min; (3) After the ultrasonic is finished, it is left to clarify and remove the bottom sediment to obtain galvanized sewage (4) Pass the supernatant of the galvanized sewage after ultrasonication and flocculation through the D751 chelating ion exchange resin, the weight ratio of the loading amount to the D751 resin is 5:1, and the loading flow rate is 0.8BV / h; (5) collect the exchanged sewage effluent, and then pass it through SP825 macroporous adsorption resin, the weight ratio of sample loading to SP825 macroporous adsorption resin is 4:1, and the sample loading flow rate is 2.0BV / h; (6) Finally, the treated...

Embodiment 3

[0012] (1) drop into ferrous sulfate and ferric chloride in galvanized sewage, the addition of ferrous sulfate is 3.5wt% of sewage weight, and the addition of ferric chloride is 0.9wt% of sewage weight; (2) After adding ferrous sulfate and ferric chloride flocculants, the sewage was subjected to ultrasonic treatment, the ultrasonic power was 1100w, and the ultrasonic time was 40min; (3) After the ultrasonic was finished, it was left to clarify and the bottom sediment was removed to obtain galvanized sewage (4) Pass the supernatant of the galvanized sewage after ultrasonication and flocculation through D751 chelating ion exchange resin, the weight ratio of the loading amount to the D751 resin is 5:1, and the loading flow rate is 1.4BV / h; (5) collect the exchanged sewage effluent, and then pass it through SP825 macroporous adsorption resin, the weight ratio of sample loading to SP825 macroporous adsorption resin is 4:1, and the sample loading flow rate is 1.7BV / h; (6) Finally, ...

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Abstract

The invention provides a method for treating galvanization sewage. The method comprises the following steps: (1) putting ferrous sulfate and ferric trichloride in the galvanization sewage to carry out flocculation; (2) after flocculation, carrying out ultrasonic treatment on the sewage; (3) after the ultrasonic treatment is finished, carrying out standing and clarifying, and removing the precipitate of the bottom layer, thereby obtaining the liquid supernatant of the galvanization sewage; (4) enabling the liquid supernatant of the galvanization sewage subjected to the ultrasonic treatment and the flocculation treatment to pass through a D751 chelating ion exchange resin; (5) collecting a sewage effluent after exchange and enabling the sewage effluent to pass through an SP825 macroporous adsorption resin; (6) finally, collecting the treated galvanization sewage. The content of zinc ions in the treated galvanization sewage is reduced to the range of 12-17mg / L from 107mg / L and the chemical oxygen demand value of the sewage is reduced to the range from 38mg / L to 44mg / L from 264mg / L, and therefore, the zinc content of the sewage and the chemical oxygen demand are remarkably reduced.

Description

technical field [0001] The invention relates to a treatment method for sewage, in particular to a treatment method for galvanized sewage. Background technique [0002] Usually, the metal surface will rust and oxidize after being exposed to various environments for a long time. Galvanizing the metal surface is to solve this problem. Therefore, the galvanizing process is a common preparation process in the traditional manufacturing industry, which brings more galvanized sewage. Not only the zinc content in these galvanized sewage is high, but the chemical oxygen demand value of the sewage is also high. , if it is directly discharged into the environment, it will cause great damage to the environment around the sewage discharge. It is very necessary to reduce the zinc content and chemical oxygen demand in sewage. Conventional ion exchange methods have a limited effect on reducing these two values, and cannot significantly and effectively reduce the hazards of galvanized sewage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F103/16
Inventor 戴晓宸
Owner SUZHOU GANNZ ELECTRONICS TECH CO LTD
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