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Method for treating organic sewage by synergy of cavitation effect and sulfuric acid free radicals

A cavitation effect and organic sewage technology, which is applied in chemical instruments and methods, oxidized water/sewage treatment, light water/sewage treatment, etc., can solve the problem of uncontrollable industrialization promotion, large amount of oxidant hydrogen peroxide, and poor treatment effect It is very ideal to achieve the effect of promoting contact, fast degradation rate and wide application range of pH value

Inactive Publication Date: 2011-04-13
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sewage treatment methods disclosed in the above two patent documents both need to pre-adjust the pH value, and the pollutants in the water are oxidized and degraded by the generated hydroxyl radicals, and the amount of the oxidant hydrogen peroxide is relatively large, and the treatment effect is not very ideal.
The patent application document with the application number 200810139592.X discloses a method of coupling hydraulic cavitation and ozone to treat sewage, but the cost of ozone is high and has a pungent special smell. The problem of this method has brought a certain degree of uncontrollability to the industrialization of this method.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Containing 100ml of golden orange II solution in the reactor, wherein golden orange II concentration is 30mg / L (0.086mM), potassium hydrogen persulfate compound salt (2KHSO 5 ·KHSO 4 ·K 2 SO 4 ) concentration is 0.4g / L (0.65mM) and 0.01gCo 3 o 4 . Stir vigorously and process under the action of ultrasonic waves. The ultrasonic frequency is 20KHz, the power is 150W, and the reaction temperature is 25°C. After 60 minutes, the degradation rate of Golden Orange II is about 76.5%.

Embodiment 2

[0028] Contain 100ml of 2,4-dichlorophenol solution in the reactor, wherein 2,4-dichlorophenol concentration is 80mg / L (0.49mM), sodium persulfate concentration is 11600mg / L (48.74mM), AgNO 3 The concentration is 8.5mg / L (0.050mM). Stir vigorously and process under the action of ultrasonic waves. The ultrasonic frequency is 631KHz, the power is 500W, and the reaction temperature is 40°C. After 60 minutes, the degradation rate of 2,4-dichlorophenol is about 92.0%.

[0029] Comparative Example 1: The above system is not subjected to ultrasonic treatment, and other reaction conditions are the same, and sewage treatment is performed, the degradation rate of 2,4-dichlorophenol is about 78.5% after 60 minutes.

[0030] Comparative example two: in the solution with the same concentration of 2,4-dichlorophenol, add 48.74mM H 2 o 2 and 0.050mM FeSO 4 , the ultrasonic frequency is 631KHz, the power is 500W, and the reaction temperature is 40°C for reaction degradation. After 60 minu...

Embodiment 3

[0032] Contain 100ml of 2-chlorobiphenyl solution in the reactor, wherein 2-chlorobiphenyl concentration is 5.0mg / L (0.026mM), potassium persulfate compound salt (2KHSO 5 ·KHSO 4 ·K 2 SO 4 ) concentration is 0.2g / L (0.33mM), potassium persulfate concentration is 100mg / L (0.37mM), AgNO 3 The concentration is 20mg / L (0.12mM) and 0.01g CO 3 o 4 . Stir vigorously and process under the action of ultrasonic waves. The ultrasonic frequency is 1200KHz, the power is 900W, and the reaction temperature is 85°C. After 60 minutes, the degradation rate of 2-chlorobiphenyl is about 83.5%.

[0033] Comparative example 1: the above system is not subjected to ultrasonic treatment, and other reaction conditions are the same, and sewage treatment is performed, the degradation rate of 2-chlorobiphenyl is about 52.6% after 60 minutes.

[0034] Comparative example two: In the solution with the same concentration of 2-chlorobiphenyl, add 1.03mM H 2 o 2 and 0.12mM FeSO 4 , the ultrasonic fre...

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Abstract

The invention relates to a method for treating sewage, in particular to a method for treating organic sewage by the synergy of a cavitation effect and sulfuric acid free radicals. The method comprises the following steps of: adding an oxidant and a catalyst into organic pollutant-containing sewage, and performing oxidative degradation on organic pollutants under the action of the cavitation effect. The cavitation effect is an ultrasonic or hydraulic cavitation effect, preferably the hydraulic cavitation effect; the hydraulic cavitation effect is a jet cavitation effect or an eddy cavitation effect; the jet cavitation effect is generated through a pipe of which the diameter is changed rapidly; and the eddy cavitation effect is generated through a cylinder type eddy cavitation bin. The cavitation effect is applied to the process of treating the sewage by the sulfuric acid free radicals, so that the generation efficiency of the sulfuric acid free radicals is improved, and the degradation rate of the organic pollutants in water is improved; in the method, reaction conditions are simple and mild, a high temperature and ultraviolet ray and gamma ray irradiation are not needed, and a pH value has a wide application range and does not need to be adjusted; and the reaction speed is high, and the using amount of the oxidant is reduced; and the treatment efficiency is high, and the method is suitable for treating a large amount of the sewage.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a method for treating organic sewage with cavitation effect and sulfuric acid free radicals. Background technique [0002] With the rapid development of our country's economy, the environmental problems caused by it are becoming more and more obvious, especially the increasing amount of industrial waste water, which has brought serious water pollution problems. Due to the shortage of water resources per capita in our country, coupled with the increasingly serious water pollution, water supply has become a key factor restricting economic and social development. Although our country has achieved a certain degree of development in environmental protection while developing its economy, it is undeniable that our country's environmental situation is still quite severe. Therefore, further strengthening environmental protection and improving water quality have become an urgent issue. [000...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/32C02F101/30
Inventor 马振民国伟林刘本华吴恩江李庆国张慧申开永梅
Owner UNIV OF JINAN
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