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Two-stage dielectric barrier discharge plasma wastewater treatment device

A technology of dielectric barrier discharge and wastewater treatment, which is applied in the field of environmental pollution control, can solve the problems of small treatment capacity and difficult amplification, and achieve the effect of simple treatment process, good removal effect and easy control

Active Publication Date: 2017-01-04
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although there have been many discussions on the application principle of DBD plasma in wastewater treatment at home and abroad, the design of the plasma wastewater treatment device only focuses on experimental research, and the treatment capacity is small, so it is difficult to enlarge it to the actual project.
There is no research or report on the use of two-stage new dielectric barrier discharge plasma to treat wastewater at home and abroad.

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  • Two-stage dielectric barrier discharge plasma wastewater treatment device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Wastewater species: methylene blue wastewater

[0035] Treatment method: Prepare 100mg / L methylene blue wastewater with a conductivity of 17.82μs / cm and a pH of 5.60, enter the plasma reactor at a flow rate of 150mL / min, adjust the voltage to 100V, and the current to 1.75A.

[0036] process result:

[0037] Original solution, COD=103.488mg / L, absorbance A=2.667.

[0038] After 2.5 hours of reaction, COD=19.712 mg / L, absorbance A=0.059.

[0039] The COD degradation rate is 80.95%, and the decolorization rate is 97.79%.

Embodiment 2

[0041] Wastewater species: chrome black T

[0042] Treatment method: Prepare 75mg / L of chrome black T wastewater with a conductivity of 47.30μs / cm and a pH of 5.30, enter the plasma reactor at a flow rate of 150mL / min, adjust the voltage to 90V, and the current to 1.85A.

[0043] process result:

[0044] Original solution, COD=108.664mg / L, absorbance A=0.164.

[0045] After reacting for 0.5h, COD=102.272 mg / L, absorbance A=0.

[0046] The COD degradation rate is 6%, and the decolorization rate is 100%.

[0047] After 4 hours of reaction, COD=60.085 mg / L, absorbance A=0.

[0048] The COD degradation rate was 44%, and the decolorization rate was 100%.

Embodiment 3

[0050] Wastewater type: acid orange Ⅱ wastewater

[0051] Treatment method: Prepare 200mg / L acid orange II wastewater with a conductivity of 35.30μs / cm and a pH of 6.40, enter the plasma reactor at a flow rate of 150mL / min, adjust the voltage to 90V, and the current to 1.10A.

[0052] process result:

[0053] Original solution, COD=177.480mg / L, absorbance A=1.463.

[0054] After 5 hours of reaction, COD=126.000 mg / L, absorbance A=0.020.

[0055] The COD degradation rate was 29.01%, and the decolorization rate was 98.63%.

[0056] Through the exquisite design of the inner and outer sleeves, two-stage discharge is realized to obtain the largest possible space utilization and the contact area between plasma and wastewater, and to solve the treatment of continuous flow wastewater. No long residence time is required, and the pollutant removal effect is good. During waste water treatment, there is no need to add reaction reagents, the treatment process is simple, and the control...

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Abstract

The invention discloses a novel two-stage dielectric barrier discharge plasma wastewater treatment device, which comprises a device support and a reactor installed on the device support; the reactor adopts a mutually perpendicular two-stage discharge electrode structure. The invention can continuously treat waste water through the two-stage novel dielectric barrier discharge plasma waste water treatment device, does not need a long residence time, and has good pollutant removal effect. During waste water treatment, there is no need to add reaction reagents, the treatment process is simple, and the control is easy to realize.

Description

technical field [0001] The invention relates to a novel two-stage dielectric barrier discharge plasma wastewater treatment device, which belongs to the technical field of environmental pollution control. Background technique [0002] Water pollution is a serious challenge facing the world today. With the development of the world economy and technological level, a large amount of refractory organic industrial wastewater produced in printing and dyeing, pharmaceutical, chemical, petroleum and other industries has caused serious environmental pollution. The comprehensive treatment of refractory organic industrial wastewater has always been an important topic in the field of environmental protection. . [0003] At present, the methods for treating wastewater mainly include physical treatment, chemical treatment, biological treatment and combined process. Physical and chemical methods are effective in treating wastewater, but they only transfer pollutants from one phase to anot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/46C02F1/32C02F1/78
Inventor 陶旭梅黄亮叶庆国
Owner QINGDAO UNIV OF SCI & TECH