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Method for treating waste water containing sulfate radical

A treatment method, technology containing sulfuric acid, applied in water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of unpublished removal of sulfate radicals, high price, etc., to achieve optimal use, Easy to control and realize the effect of resources

Inactive Publication Date: 2017-07-21
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method works better, but the resin used needs to be imported from Germany or Japan, and the price is higher
[0007] It can be seen that the published methods for removing sulfate radicals are nothing more than chemical precipitation, ion exchange and pressurized oxygen treatment, and there is no published method for removing sulfate radicals by direct electrolysis.

Method used

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  • Method for treating waste water containing sulfate radical
  • Method for treating waste water containing sulfate radical
  • Method for treating waste water containing sulfate radical

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The sulfate-containing wastewater is wastewater from a dyeing factory, and the water quality is shown in Table 1:

[0038] Table 1 Dyeing plant wastewater and effluent quality after treatment

[0039]

[0040] Adjust the pH of wastewater to 4 to 10cm 2 The square lead plate is the anode, and the stainless steel of the same size is used as the cathode. The voltage is 5V and the current density is 0.25A / cm under the condition that the anode and cathode are directly opposite and the pole distance is kept 20cm. 2 Under electrolysis for 300 minutes, adjust the pH to 6.7, and the effluent water quality meets the discharge standard, see Table 1. SO in wastewater 4 2- The removal rate is 98.44%.

Embodiment 2

[0042] The sulfate wastewater is wastewater from a power plant, and the water quality is shown in Table 2:

[0043] Table 2 Power plant wastewater and effluent quality after treatment

[0044]

[0045] Adjust the pH of the wastewater to 4.5, to 20cm 2 The square lead plate is the anode, and the graphite plate of the same size is used as the cathode. The voltage is 3V and the current density is 0.4A / cm under the condition that the anode and the cathode are directly opposite and the pole distance is kept 10cm. 2 Under electrolysis for 60 minutes, adjust the pH to 7, and the effluent quality reaches the discharge standard, see Table 2. SO in wastewater 4 2- The removal rate is 90.24%.

Embodiment 3

[0047] The sulfate-containing wastewater is wastewater from an electroplating plant. The water quality is shown in Table 3:

[0048] Table 3 Electroplating wastewater and water quality after treatment

[0049]

[0050] Adjust the pH of the wastewater to 5.5, to 25cm 2 The square lead plate is the anode, the metal titanium plate of the same size is used as the cathode, and the voltage is 5V and the current density is 0.6A / cm under the condition that the anode and the cathode are directly opposite and the pole distance is kept 20cm. 2 Under electrolysis for 30 minutes, adjust the pH to 7.3, and the effluent quality reaches the discharge standard, see Table 3. SO in wastewater 4 2- The removal rate is 90.76%.

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Abstract

The invention relates to the technical field of waste water treatment, in particular to a method for treating waste water containing the sulfate radical. The method for treating the waste water containing the sulfate radical is characterized in that in the treatment process, a lead sheet is taken as an anode, an inert conductive material is taken as a cathode, the waste water containing the sulfate radical is subjected to electrolytic treatment, Pb<2+> produced by anode lead sheet reaction and the sulfate radical form PbSO4 sediment, the sediment is separated by filtration, and the waste water is discharged after the pH of the filtrate is adjusted. According to the method, the technological process is simple, control is easy, closed cycle is easy to establish, the method is environment-friendly, no secondary pollution is produced, waste residues can be recycled, optimization utilization of the resources is realized, and the waste water treatment cost is reduced.

Description

Technical field [0001] The invention relates to a method for treating wastewater containing sulfate radicals, which relates to sewage treatment, particularly a method for treating industrial wastewater containing sulfate radicals. Background technique [0002] As one of the most common inorganic acids, sulfuric acid is not only widely used in the chemical fertilizer industry, metallurgical industry, petroleum industry, machinery industry, pharmaceutical industry, detergent production, military industry, atomic energy industry and aerospace industry and other industrial sectors, but also It produces dyes, pesticides, chemical fibers, plastics, coatings, and various basic organic and inorganic chemical products. The wastewater discharged by these related enterprises often contains a large amount of sulfate radicals. Since most of the sulfates are highly soluble and stable in nature, they are difficult to remove by natural purification. Discharge of sulfate-containing wastewater in...

Claims

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Application Information

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IPC IPC(8): C02F1/463C02F101/10
CPCC02F1/46104C02F1/463C02F2101/101
Inventor 刘万超孙凤娟闫琨李学鹏张朝普和新忠练以诚雷树喜刘中凯苏钟杨
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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