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Method for treating industrial wastewater by low temperature using plasma and treating equipment

A low-temperature plasma and industrial wastewater technology, applied in water/sewage treatment, chemical instruments and methods, neutralization of water/sewage treatment, etc., can solve the problems of difficult control of microbial performance, low degradation rate of organic matter, large amount of coagulant, etc. , to achieve the effect of saving energy consumption, occupying a small area and low cost

Inactive Publication Date: 2007-10-10
广州精浦环保科技有限公司
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Problems solved by technology

Its disadvantages are: the amount of coagulant used is large, the degradation rate of organic matter is low, and the effect on highly toxic and refractory sewage is even worse; the electrolytic coagulation method is basically the same as the chemical coagulation method, that is, to remove the charge on the colloid and make it coagulate. The disadvantage is that it consumes a lot of power and the equipment is complicated
The biological treatment method is to transform the sewage solution, colloid, micro-suspended organic matter, toxic substances and other pollutants into stable and harmless substances through the metabolism of microorganisms. The biological treatment method is divided into aerobic treatment and anaerobic treatment. There are two methods of treatment. The aerobic treatment method is currently commonly used with activated sludge method, biological filter and oxidation pond. The anaerobic treatment method is also called biological reduction treatment method, which is mainly used to treat high-concentration organic wastewater and sludge. The equipment used is mainly a digester, etc. The disadvantages are high cost of cultivation, small range of use, and difficult control of the performance of microorganisms

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  • Method for treating industrial wastewater by low temperature using plasma and treating equipment

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Experimental program
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Effect test

Embodiment 1

[0023] Conditions: the distance between the centers of the cathode and anode electrodes is 5 cm, and the area ratio of the cathode electrode to the anode electrode is: 1:20.

[0024] Wastewater species: leather treatment and processing wastewater.

[0025] Treatment method: take 200ml of leather wastewater, adjust its conductivity to 15ms / cm with hydrochloric acid, pour it into a plasma reactor, and adjust the voltage at 150V to make the wastewater transition from conventional electrolysis to glow plasma electrolysis until the gas sheath around the cathode electrode The layer is broken down to form a glow plasma; adjust the voltage to 600V, at this time, under the action of the plasma, the wastewater boils violently, the substances in the wastewater are quickly decomposed, and the reaction time is 10 minutes; the treated wastewater is discharged and statically Set aside for 30min, at this time the solution was separated, and the supernatant was taken to measure its chromaticit...

Embodiment 2

[0031] Conditions: the distance between the centers of the cathode and anode electrodes is 4 cm, and the area ratio of the cathode electrode to the anode electrode is: 1:20.

[0032] Types of wastewater: printing and dyeing treatment and processing wastewater

[0033] Treatment method: Take 200ml of textile wastewater, adjust its conductivity to 20ms / cm with calcium hydroxide, pour it into a plasma reactor, and adjust the voltage at 100V to make the wastewater transition from conventional electrolysis to glow plasma electrolysis until the gas sheath around the cathode The layer is broken down to form a glow plasma; adjust the voltage to 600V, at this time, under the action of the plasma, the wastewater boils violently, the substances in the wastewater are quickly decomposed, and the reaction time is 10 minutes; the treated wastewater is discharged and statically Set aside for 30min, at this time the solution was separated, and the supernatant was taken to measure its chromatic...

Embodiment 3

[0039] Conditions: the distance between the centers of the cathode and anode electrodes is 4 cm, and the area ratio of the cathode electrode to the anode electrode is: 1:20.

[0040] Types of wastewater: Papermaking processing wastewater.

[0041] Take 200ml of papermaking wastewater, use sodium hydroxide to adjust its conductivity to 20ms / cm, pour it into a plasma reactor, and adjust the voltage at 100V to make the wastewater transition from conventional electrolysis to glow plasma electrolysis until the gas sheath around the cathode is Break down to form a glow plasma; adjust the voltage to 600V, at this time, under the action of the plasma, the wastewater boils violently, and the substances in the wastewater are quickly decomposed, and the reaction time is 10 minutes; discharge the treated wastewater and let it stand for 30 minutes At this time, the solution was separated, and the supernatant was taken to measure its chromaticity and COD value respectively.

[0042] The re...

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Abstract

This invention discloses method and apparatus for treating industrial wastewater by using low-temperature plasma. The method comprises: adjusting the electric conductivity of wastewater, intermittently introducing wastewater into a plasma reactor, applying a voltage of 100-700 V to the plasma reactor to form glow plasma, treating wastewater with the glow plasma for 10-30 min, and discharging treated wastewater, standing, separating and discharging. The apparatus is composed of a power source and a plasma reactor. The surface area rati of the cathode and the anode in the plasma reactor is 1 :( 1.5-50), and the central distance between them is 4-5 cm. The method has such advantages as low energy consumption, short time and high efficiency.

Description

technical field [0001] The invention relates to an industrial wastewater treatment technology, in particular to a method for treating industrial wastewater by using low-temperature plasma, and also relates to a treatment device for implementing the method. Background technique [0002] With the development of social economy, the increase of population and the continuous improvement of living standards, the demand and consumption of fresh water resources are increasing worldwide, and the discharge of corresponding urban sewage and industrial wastewater is also increasing; Lagging and insufficient control of pollution sources have caused serious global water pollution, and fresh water resources are facing major problems. With the rapid growth of my country's economy and the continuous improvement of the level of urbanization, we are also facing the same problem. The problem of water pollution is becoming more and more serious. According to statistics, in 1999, the total discha...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/46C02F1/66
Inventor 黄会峰
Owner 广州精浦环保科技有限公司
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