Method for double-frequency composite ultrasonic degradation of phenol in rural sewage

A composite ultrasonic and rural sewage technology, applied in chemical instruments and methods, neutralized water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of low ultrasonic degradation rate and achieve the effect of enhanced degradation technology

Inactive Publication Date: 2019-12-31
SOUTH CHINA UNIV OF TECH +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, so far, the problem of low sonication rate has not been solved

Method used

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  • Method for double-frequency composite ultrasonic degradation of phenol in rural sewage
  • Method for double-frequency composite ultrasonic degradation of phenol in rural sewage
  • Method for double-frequency composite ultrasonic degradation of phenol in rural sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Influencing factors of embodiment 1 probe type ultrasonic degradation of phenol

[0043] 1.1 Influence of ultrasonic power

[0044] Adjust the ultrasonic power to 200W, 240W, 280W, 320W, and 360W, sequentially take 80mL of 4mg / L phenol solution into a 150mL beaker, and use probe-type ultrasonic treatment for 20min. Experimental results such as figure 1 shown.

[0045] Depend on figure 1It can be seen that with the increase of ultrasonic power, the degradation rate of phenol decreases. When the power is 200W and 360W, the corresponding degradation rates are 6.59% and 3.75%. The possible reason is: when the ultrasonic power reaches a certain level, the cavitation bubble grows too large, causing the cavitation bubble to be compressed to collapse before it is too late. In addition, when the sound energy is too large, when the negative phase of the sound wave is too large to inhibit the formation of cavitation bubbles, the cavitation bubbles will form a shielding effect...

Embodiment 2

[0054] Influencing factors of embodiment 2 tank type ultrasonic degradation of phenol

[0055] 2.1 Influence of ultrasonic power

[0056] Use a graduated cylinder to measure 80 mL of phenol solution with a concentration of 4 mg / L into a glass test tube, and sonicate at 200 W, 240 W, 280 W, 320 W, and 360 W ultrasonic power for 20 minutes. The result is as Figure 4 shown.

[0057] Depend on Figure 4 It can be seen that the degradation rate is 6.20% when the power is 200W, 5.10% when the power is 240W, and 2.40% when the power is 360W. In general, the degradation rate of phenol is not high by using ultrasonic bath alone. This may be because at a certain ultrasonic power, the cavitation bubble grows too large, causing the cavitation bubble to be compressed to collapse before it is too late.

[0058] 2.2 Effect of initial concentration

[0059] Accurately pipette the phenol standard intermediate solution in turn to prepare solutions with initial concentrations of 2.00, 4.0...

Embodiment 3

[0066] Influencing factors of embodiment 3 dual-frequency composite ultrasonic degradation of phenol

[0067] Since the power of the dual-frequency composite ultrasound can be combined in many ways, the embodiment of the present invention adopts a fixed slot-type ultrasound power of 160W, and only changes the power of the probe-type ultrasound in the process.

[0068] 3.1 Influence of ultrasonic power

[0069] Use a graduated cylinder to measure 80 mL of the sample solution into a glass test tube, fix the power of the tank-type ultrasound to 160W, adjust the power of the probe-type ultrasound to 40W, 80W, 120W, 160W, and 200W, and ultrasound for 20 minutes. The result is as Figure 7 shown.

[0070] Depend on Figure 7 It can be seen that the degradation effect of dual-frequency composite ultrasound decreases with the increase of power. The degradation rate was 4.90% when the ultrasonic power was 200W, and decreased to 0.97% when the ultrasonic power was 360W.

[0071] 3....

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Abstract

The invention discloses a method for double-frequency composite ultrasonic degradation of phenol in rural sewage, and belongs to the technical field of phenol degradation. According to the method, double-frequency composite ultrasonic treatment is adopted to perform ultrasonic treatment on a to-be-degraded phenol solution for 10-30 min; the double-frequency composite ultrasonic degradation rate onphenol can reach 83.74%, and is improved by 45.23% and 51.11% compared with the degradation rate of single probe type ultrasonic treatment and single groove type ultrasonic treatment. Therefore, it is obviously shown that the degradation effect of dual-frequency composite ultrasonic synergistic degradation on phenol in water is ideal.

Description

technical field [0001] The invention relates to the field of phenol degradation, in particular to a method for degrading phenol in rural sewage by dual-frequency composite ultrasound. Background technique [0002] With the rapid development of the current national economy, the discharge of industrial wastewater in my country has also increased sharply. Due to the high cost of adopting the existing treatment technology, many enterprises will discount the treatment link when the supervision is not strict. When the wastewater containing a large amount of refractory organic pollutants is directly discharged into the nature, it will be harmful to human health and survival. The environment poses serious threats. How to deal with these toxic and refractory organic compounds has become one of the difficulties in the research of water pollution prevention and control circles. [0003] Phenol-containing wastewater is a kind of industrial wastewater with wide sources, large water vol...

Claims

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Application Information

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IPC IPC(8): C02F1/36C02F101/34
CPCC02F1/36C02F2101/345C02F1/66C02F2103/34
Inventor 周少奇贲永光
Owner SOUTH CHINA UNIV OF TECH
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