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Plasma water treatment method

A technology of plasma and water treatment method, applied in the field of water treatment, can solve the problems of not taking measures to improve and not fully reflecting the superiority.

Inactive Publication Date: 2002-09-04
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing reports, no measures have been taken to improve the contribution of high-temperature pyrolysis, photochemical oxidation, hydroelectric cavitation degradation, and supercritical water oxidation to water treatment during the discharge process. The superiority of the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The pulse peak voltage is 14 kV, the pulse rise time is 20-40 nanoseconds, the pulse width is 300-500 nanoseconds, and the pulse discharge repetition frequency is 90 Hz. The power supply is 150-200 watts. The effective volume of the discharge reaction chamber is 200 milliliters. The distance between the ground electrode and the discharge electrode is 30mm. The outer diameter of the discharge electrode is 0.9 mm. The air flow rate is 60 ml / min. The temperature of the water to be treated is 25°C. The discharge time is 60 minutes. When there is no TiO 2 When the catalyst is used, the decolorization rate of direct blue 2B dye in wastewater is 26.7%. When mixed with TiO 2 When the concentration is 250mg / L, the decolorization rate of Direct Blue 2B dye in wastewater is 35.9%. The decolorization rate is relatively increased by 34.4%.

Embodiment 2

[0014] The pulse peak voltage is 32 kV, the pulse rise time is 20-40 nanoseconds, the pulse width is 300-500 nanoseconds, and the pulse discharge repetition frequency is 60 Hz. The power supply is 150-200 watts. The effective volume of the discharge reaction chamber is 200 milliliters. The distance between the grounding electrode and the discharge electrode is 50mm. The outer diameter of the discharge electrode is 0.6 mm. The oxygen influx rate is 200 ml / min. The temperature of the wastewater is 25°C and the discharge time is 180 minutes. When there is no water treatment agent, the phenol content is reduced from 100ppm to 65.6ppm, and the degradation rate is 34.4%. When the concentration of sodium phosphate was 65mg / L, the content of phenol decreased from 100ppm to 58.1ppm, and the degradation rate was 41.9%. The degradation rate of phenol is relatively increased by 21.8%.

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Abstract

In the water to be treated, a soluble phosphate and / or a photocatalyst of mixture formed from Pt, Ag, Pd, Au or Ru metal and sulfur compound as active component or sulfur compound in which the metal ions of Fe(3+), V(4+) or Ru (3+) is doped are added, the above-mentioned materials can raise the effects of high-temp. pyrolysis, photochemical oxidation, hydroelectric cavitation degradation and supercritical water oxidation produced in the discharge process so as to greatly raise the water treatment effect.

Description

technical field [0001] The invention relates to a water treatment method, in particular to a high-voltage pulse discharge plasma water treatment method. Background technique [0002] For microorganisms and / or soluble toxic organics in raw water and wastewater, the existing treatment methods include chlorine disinfection or ozone oxidation for raw water, gas degassing and oxidation or biodegradation for wastewater, etc. Most trace organic substances in raw water will be chlorinated into more toxic chlorinated substances when disinfected with chlorine, and the cost of ozone oxidation is relatively high. The gas stripping method can only transfer toxic organic substances from the water phase to the atmosphere and cause secondary pollution. Oxidation of traces of toxic organics in the aqueous phase with chemical reagents is costly. When biodegradation is used, many toxic organic substances in the water phase will inhibit the growth and reproduction of biol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/48C02F1/72
Inventor 陈银生张新胜戴迎春袁渭康
Owner EAST CHINA UNIV OF SCI & TECH
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