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Bubbling cavitation method for degrading organic pollutants in wastewater

A technology for organic pollutants and wastewater, applied in the direction of oxidized water/sewage treatment, etc., can solve the problems of difficult to achieve industrialization, low degradation efficiency, lack of ultrasonic cavitation technology, etc.

Inactive Publication Date: 2012-08-22
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of comprehensive utilization of relevant professional knowledge of ultrasonic cavitation technology, it is difficult to realize industrialization
Hydrodynamic cavitation technology is still in its infancy, and its degradation efficiency is relatively low, so it cannot be applied in practice

Method used

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  • Bubbling cavitation method for degrading organic pollutants in wastewater
  • Bubbling cavitation method for degrading organic pollutants in wastewater
  • Bubbling cavitation method for degrading organic pollutants in wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 Degradation of Organic Pollutants in Wastewater by Bubbling Cavitation——Effect of Bubbling Time on Degradation Rate

[0031] Proceed as follows:

[0032] 1) Glass beads with a diameter of 2.0-2.5 mm are added to the degrader, and the amount of glass beads added is three quarters of the volume of the degrader;

[0033] 2) Adjust the concentration of acid red B aqueous solution to 10 mg L -1 , the acidity is pH=6.0, add in the degrader, the addition is 3cm higher than the glass beads;

[0034] 3) Gas is introduced from the bottom of the degrader, and the gas flow rate is controlled at 4.5 L min -1 , react for 1 to 5 hours. Samples were taken at different times to measure the UV-vis spectrum, and the concentration of the acid red B aqueous solution was determined. Quantitative analysis was carried out by UV-vis spectrophotometry. A series of acid red B solutions were scanned by UV-vis spectrum to determine the wavelength of the maximum absorption peak (λ...

Embodiment 2

[0037] Example 2 Degradation of Organic Pollutants in Wastewater by Bubbling Cavitation——Effect of Glass Bead Diameter on Degradation Rate

[0038] Proceed as follows:

[0039] 1) Glass beads with a diameter of 1.0-1.5 mm, 2.0-2.5 mm, 3.0-3.5 mm and 4.0-4.5 mm are added to the degrader, and the amount of glass beads added is three quarters of the volume of the degrader;

[0040] 2) Adjust the concentration of acid red B aqueous solution to 10 mg L -1 , the acidity is pH=6.0, add in the degrader, the addition is 3cm higher than the glass beads;

[0041] 3) Gas is introduced from the bottom of the degrader, and the gas flow rate is controlled at 4.5 L min -1 , reacted for 3 hours. Using UV-vis spectrophotometry (λ max = 510 nm) to measure the concentration of the solution, and calculate the degradation rate of acid red B from the concentration change. The result is as image 3 .

[0042] The diameter of the glass beads determines the size and number of air bubbles blow...

Embodiment 3

[0043] Example 3 Degradation of Organic Pollutants in Wastewater by Bubbling Cavitation——Influence of Initial Concentration on Degradation Rate

[0044] Proceed as follows:

[0045] 1) Glass beads with a diameter of 2.0-2.5 mm are added to the degrader, and the amount of glass beads added is three quarters of the volume of the degrader;

[0046] 2) Adjust the initial concentration of acid red B aqueous solution to 5 mg·L respectively -1 , 10mg·L -1 , 15mg·L -1 , 20mg·L -1 , 25mg·L -1 , the acidity is pH=6.0, add in the degrader, the addition is 3 cm higher than the glass beads;

[0047] 3) Gas is introduced from the bottom of the degrader, and the gas flow rate is controlled at 4.5 L min -1 , reacted for 3 hours. Using UV-vis spectrophotometry (λ max = 510 nm) to measure the concentration of the solution, and calculate the degradation rate of acid red B from the concentration change. The result is as Figure 4 .

[0048] The initial concentration of wastewater s...

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Abstract

The invention relates to a bubbling cavitation method for degrading organic pollutants in wastewater to solve the problem of water pollution. The technical scheme adopted in the invention comprises the following steps of: adding glass beads into a degradation device; adding wastewater containing organic pollutants into the degradation device with the wastewater level being over the glass beads; letting a gas enter from the bottom of the degradation device, and reacting for 3-5 hours. By the combined action of glass beads and air bubbling, organic pollutants such as acid red B in wastewater can be effectively degraded with the degradation rate being more than 97%. The bubbling cavitation method provided by the invention is a high efficient and energy-saving sewage processing method with nosecondary pollution, requires simple equipment, has practical values, and can be utilized to process various wastewaters on a large scale.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a method for degrading organic pollutants in waste water by adopting a bubbling cavitation method. Background technique [0002] In recent years, with the growth of population and the development of social economy, the discharge of various pollutants has also increased day by day, especially the pollution of water by pollutants has constituted a serious threat to human survival and social development. In recent years, people have begun to pay attention to the problem of water pollution. Preventing the deterioration of water bodies and protecting water resources have become the common goals of human beings. In terms of water treatment, as a treatment method for refractory wastewater, cavitation technology can not only effectively remove various toxic substances, but also has many advantages such as no secondary pollution, simple reaction device and obvious degra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/74
Inventor 金旭东王君高敬群
Owner LIAONING UNIVERSITY
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