Method of using active persulphate for processing difficult-biodegradability organic waste water

A technology for activating persulfate and organic waste water, applied in oxidation water/sewage treatment, light water/sewage treatment, etc., can solve problems such as hindering the application of thermally activated persulfate, complex heating system, serious heat loss, etc. Start and stop heating quickly, no secondary pollution, uniform heating effect

Inactive Publication Date: 2009-09-09
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing heat-activated persulfate technology has complex heating systems, uneven heating, serious heat loss, and high cost, which hinder the application of heat-activated persulfate technology in organic wastewater treatment.

Method used

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  • Method of using active persulphate for processing difficult-biodegradability organic waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Treatment example of low concentration organic wastewater golden orange II solution.

[0015] Get 250mL of the golden orange II solution of printing and dyeing wastewater, the concentration is 20mg / L; the amount of sodium persulfate is 0.034g (10:1 with the golden orange II molar ratio); first put the sodium persulfate into the reaction container filled with the golden orange II solution After mixing and dissolving, it is placed in a microwave generator with a frequency of 2450 MHz and a power of 800 W for 2-8 minutes to complete radiation heating.

[0016] Experimental results

[0017] Microwave radiation time (min)

Embodiment 2

[0019] An example of the treatment of high-concentration organic wastewater golden orange II solution.

[0020] Get 250mL of printing and dyeing wastewater Golden Orange II solution, the concentration is 1000mg / L; the amount of sodium persulfate is 4.247g (molar ratio with Golden Orange II is 25:1); first put sodium persulfate into the reaction container filled with Golden Orange II solution , after mixing and dissolving, put it in the above-mentioned microwave generator and heat it for 2-8 minutes to complete.

[0021] Experimental results

[0022] Microwave radiation time (min)

Embodiment 3

[0024] Catalyst added to the treatment example of high-concentration organic wastewater golden orange II solution.

[0025] Take 250mL of printing and dyeing wastewater golden orange II solution, the concentration is 500mg / L; the amount of sodium persulfate is 4.247g (molar ratio to golden orange II is 50:1); add catalyst activated carbon 0.025g, 0.25g; put sodium persulfate and activated carbon first Put it into the reaction vessel containing the golden orange II solution, mix it, place it in the above-mentioned microwave generator and heat it by radiation for 2-8 minutes, and then complete.

[0026] Experimental results

[0027]

[0028] Obviously, the degradation rate of Golden Orange II was further improved after adding catalyst activated carbon before microwave activation of sodium persulfate to treat organic wastewater Golden Orange II solution.

[0029] Above-mentioned microwave generator can be refitted with domestic microwave oven.

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Abstract

The invention relates to a method of using active persulphate for processing difficult-biodegradability organic waste water, which is characterized in that persulphate is firstly thrown into a reaction container containing organic waste water, after mixing and dissolving, the mixture is placed into a microwave generator with the frequency of 2450 MHz and the power of 800 W to be radiated for several minutes to be completed, wherein the biodegradability index BOD5 / COD of the organic waste water is lower than 0.2, and the mol ratio of the throwing amount of the persulphate and the organic matter in the organic waste water is 10:1 to 50:1. The persulphate includes peroxy-monosulphate and peroxydisulphate. To improve the degrading efficiency of the organic waste water, before using the microwave active persulphate for processing the difficult-biodegradability organic waste water, a catalyst is added, wherein the ratio of the weight of the catalyst and the volume of the organic waste water is 0.1 to 1, and the added catalyst is active carbon, and the like. The invention has the characteristics of short processing time, no secondary pollution and small occupied land area of the equipment, and can obtain an excellent processing effect on the difficult-biodegradability organic waste water.

Description

technical field [0001] The invention belongs to the organic wastewater treatment technology, and in particular relates to a method for treating biochemically difficult organic wastewater by activating persulfate. Background technique [0002] Refractory organic wastewater refers to wastewater that is difficult to degrade by ordinary biodegradation, and its biochemical index BOD 5 / COD is less than 0.2. Current treatment methods include physical, chemical and biological methods. Biological treatment methods are widely used in wastewater treatment due to the advantages of simple equipment and low operating costs. However, the equipment occupies a large area and the treatment cycle is long. Especially for some refractory organic substances, it is difficult to achieve good treatment by ordinary biological methods. The treatment effect requires the domestication of special strains, and the treatment is more complicated. However, traditional physical and chemical methods such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/30
Inventor 杨世迎杨鑫韦光单良张文义王萍
Owner OCEAN UNIV OF CHINA
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