Degradation method for treating phenolic wastewater by ultrasonic collaborative pulse electric field

A technology of pulsed electric field and phenol wastewater, applied in the fields of magnetic field/electric field water/sewage treatment, water/sludge/sewage treatment, mechanical oscillation water/sewage treatment, etc., can solve the problem of increased power consumption, change of electrode surface properties, and electrode activity Decrease and other problems, to achieve the effect of accelerated reduction, increased concentration, and fast degradation

Inactive Publication Date: 2014-11-19
LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, in the electrolytic treatment of organic wastewater, when the organic matter is oxidized or reduced on the electrode, a polymer film will be formed on the surface of the electrode, thereby changing the surface properties of the electrode, resulting in a decrease in electrode activity and an increase in power consumption.
[0010] At present, there is no report on the synergistic effect of ultrasound and pulse electrochemistry on the treatment of phenolic wastewater.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: A kind of ultrasound synergistic pulse electric field treatment phenol-containing wastewater degradation method, its operation steps are as follows: in the phenol-containing wastewater to be degraded, add the NaCl electrolyte that concentration is 1mol / L, control the concentration of NaCl electrolyte in phenol-containing wastewater 0.1 ~ 1mol / L, and then use hydrochloric acid with a concentration of 1mol / L to adjust the pH of the phenol-containing wastewater to 4; the concentration of phenol in the phenol-containing wastewater is 200 mg / L. In the tank, the distance between the electrodes is 20mm, the constant voltage of the pulse power supply is 10V, and the pulse period is 10ms; then an ultrasonic head is inserted into the wastewater containing phenol, and the ultrasonic output power is adjusted to 300W, the frequency is 25kHz, the ultrasonic time is 10s, and the interval time is 8s , and then simultaneously turn on the ultrasonic wave and pulse electric f...

Embodiment 2

[0030] Embodiment 2: a kind of ultrasonic synergistic pulse electric field treatment phenol-containing wastewater degradation method, its operation steps are as follows: in the phenol-containing wastewater to be degraded, add the KCl electrolyte that concentration is 0.5mol / L, control the KCl electrolyte in phenol-containing wastewater The concentration is 0.1-1mol / L, and then the aqueous sodium hydroxide solution with a concentration of 0.1mol / L adjusts the pH of the phenol-containing wastewater to 10; the phenol concentration in the phenol-containing wastewater is 200 mg / L, and the plate-shaped copper electrode is placed in the container In the reaction tank containing phenolic wastewater, the distance between the electrodes is 10mm, the pulse power supply is controlled at a constant voltage of 8V, and the pulse period is 1ms; then an ultrasonic head is inserted into the phenolic wastewater, and the ultrasonic output power is adjusted to 50W, the frequency is 20kHz, and the in...

Embodiment 3

[0031] Embodiment 3: A kind of ultrasound synergistic pulse electric field treatment phenol-containing wastewater degradation method, its operation steps are as follows: in the phenol-containing wastewater to be degraded, add the sodium sulfate electrolyte that concentration is 0.7mol / L, control sodium sulfate electrolyte in phenol-containing wastewater The concentration in the phenol-containing wastewater is 0.1-1mol / L, and then the concentration is 0.5mol / L hydrochloric acid to adjust the pH of the phenol-containing wastewater to 5; the phenol concentration in the phenol-containing wastewater is 200 mg / L, and the mesh iron-aluminum-titanium electrode is placed Put it into the reaction tank containing phenol-containing wastewater, the distance between the electrodes is 35mm, control the pulse power supply with a constant voltage of 12V, and the pulse period is 10ms; then insert an ultrasonic head into the phenol-containing wastewater, adjust the ultrasonic output power to 300W,...

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Abstract

The invention relates to a degradation method for treating phenolic wastewater by ultrasonic collaborative pulse electric field. The degradation method comprises the steps of: adding sodium salt or potassium salt electrolyte into the phenolic wastewater to be degraded, and adjusting the pH value to be 4-10 by using acid or alkali; putting electrodes into the phenolic wastewater, wherein the distances among the electrodes are within the range of 10-35mm, and controlling the constant voltage of a pulsed power supply to be 8-12V and the pulse period to be 0.1-10ms; inserting an ultrasonic head into the phenolic wastewater, and adjusting the ultrasonic output power to be 50-900W and the frequency to be 20-25kHz, the ultrasonic time to be 0.5-10s and the interval time to be 0.5-10s; and then, starting ultrasonic wave and the pulse electric field for degradation. The degradation efficiency of phenol is improved by the synergistic effect of the ultrasonic wave and the pulse electric field; and under the same pulse electric field, the degradation rate is obviously increased compared with the pure pulse electric field or ultrasonic field. The degradation method is simple in operation, the electrodes used by the method are low in cost and easily obtained, the phenol can be completely degraded, and the degradation process is safe and environment-friendly.

Description

technical field [0001] The invention relates to a degradation method for treating phenol-containing wastewater, in particular to a degradation method for treating phenol-containing wastewater by ultrasonic and pulsed electric field. 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 industr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/36C02F1/48C02F101/34
Inventor 史永刚土明林王帅
Owner LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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