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Resource utilization method of strong acid wastewater containing phosphorus and sulfur

Active Publication Date: 2021-11-23
ZHEJIANG LINJIANG CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of wastewater has strong acidity, high phosphorus and high salt. If it is discharged directly, the environmental pollution will be quite large, and it will easily cause eutrophication of the water body.
Moreover, the waste water contains a large amount of phosphorus and sulfur elements, and it is a great waste if it is not used as a resource.

Method used

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  • Resource utilization method of strong acid wastewater containing phosphorus and sulfur
  • Resource utilization method of strong acid wastewater containing phosphorus and sulfur

Examples

Experimental program
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Effect test

Embodiment 1

[0035] see Figure 1-2 , a method for resource utilization of waste water, comprising using waste water from the production of pharmaceutical intermediates as raw materials, the content of phosphate ions in the waste water is 1.8-2.8 mol / L, the content of sulfate ions is 8.0-10.0 mol / L, and the concentration of hydrogen ions is 18.0~26.0mol / L; the steps are as follows:

[0036] (1) Take a certain volume of the above wastewater, adjust the pH value of the wastewater with magnesium oxide, add a mixture of iron powder and activated carbon, and aerate the beaker for 1.5~2.5 hours to degrade the organic impurities in the wastewater by iron-carbon micro-electrolysis, and then filter , Activated carbon can be reused.

[0037] (2) Add a certain volume of 30% hydrogen peroxide to the filtrate obtained in step (1), stir for 0.5 to 3 hours, perform Fenton oxidation to degrade the remaining organic impurities in the wastewater, and then filter.

[0038] (3) Slowly add a certain volume o...

Embodiment 2

[0044]Specifically recommend the resource utilization method of the phosphorous and sulfur-containing strong acid wastewater of the present invention: use the production wastewater of pharmaceutical intermediates as raw material, the content of phosphate ion in the wastewater is 1.8 ~ 2.8mol / L, and the content of sulfate ion is 8.0 ~ 10.0mol / L, hydrogen ion concentration 17.0~20.0mol / L; take a certain volume of the above wastewater, use magnesium oxide to adjust the pH value of the wastewater to 0.3~0.8, add a mixture of iron powder and activated carbon, the iron powder and phosphate ion The amount ratio of the substance is 1:1, the mass ratio of the iron powder and activated carbon is 1~2:1, aeration is carried out in the beaker for 1.5~2.5 hours, and the organic impurities in the waste water are degraded by iron-carbon micro-electrolysis, and then filtered, Activated carbon can be reused; add a certain volume of 30% concentration of hydrogen peroxide to the filtrate, the volu...

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Abstract

The invention discloses a resource utilization method of strong acid wastewater containing phosphorus and sulfur, and belongs to the field of wastewater utilization. The resource utilization method of the strong acid wastewater containing phosphorus and sulfur comprises the following steps: using production wastewater of medical intermediates as a raw material, firstly adjusting the pH value of the wastewater, adding a mixture of iron powder and activated carbon, carrying out iron-carbon micro-electrolysis, and filtering to remove the activated carbon, and adding hydrogen peroxide to carry out Fenton oxidation; and further oxidizing the ferrous ions into iron ions, adjusting the pH value of the solution by magnesium oxide, and preparing iron phosphate dihydrate and magnesium sulfate heptahydrate by a series of post-treatment methods. According to the method, the iron phosphate dehydrate and the magnesium sulfate heptahydrate are prepared by taking the phosphorus and sulfur-containing strongly acidic production wastewater of a medical intermediate as a raw material, so that the treatment cost of the wastewater can be reduced, and the pollution of the wastewater to the environment is avoided.

Description

technical field [0001] The invention relates to the field of waste water utilization, and more specifically, relates to a resource utilization method of phosphorous and sulfur-containing strongly acidic waste water. Background technique [0002] Pharmaceutical intermediate wastewater is produced during the production of pharmaceutical intermediates through chemical synthesis and other methods. In recent years, with the gradual strengthening of environmental protection awareness and pressure in developed countries, the production and trade of pharmaceutical intermediates has gradually shifted to developing countries. The rapid development of the pharmaceutical intermediate industry in my country has also brought serious environmental pollution problems. With the rapid development of my country's modernization and urbanization, and the gradual enhancement of environmental protection awareness, environmental protection and resource conservation have become my country's basic n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C01B25/37C01F5/40
CPCC02F9/00C01B25/375C01F5/40C02F1/66C02F1/46176C02F1/722C02F1/001C02F2301/08C02F2305/026C02F2209/18C02F2209/19C02F2209/06
Inventor 易克炎杨江宇尹凯徐伟伟罗文利阮浩华杨小云尹文旭李美超刘听说张永生张政毛伟贾成国
Owner ZHEJIANG LINJIANG CHEM