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Device for treating refractory organic sewage with nanosecond pulse discharge plasma

A technology of discharge plasma and nanosecond pulse, which is applied in illumination water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of high treatment cost, poor effect of macromolecular organic matter, and difficulty in general promotion and application. Low treatment cost, beneficial to subsequent biochemical degradation, and beneficial effect of biochemical degradation

Inactive Publication Date: 2009-10-28
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the conventional treatment methods for refractory organic wastewater at home and abroad mainly include biological methods, physicochemical methods, and oxidation methods, etc., but these methods have poor effects on toxic and harmful high-molecular organic substances, and the treatment costs are high, so it is difficult to be widely used.

Method used

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  • Device for treating refractory organic sewage with nanosecond pulse discharge plasma

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In this example, the shell of the sewage treatment equipment reaction tower is made of plexiglass, with a size of 400mm×400mm×1000mm cuboid. The electrodes are copper wires with a length of 500mm and a diameter of 2mm, covered with a 2mm thick glass tube. A total of 21 pairs of electrodes are arranged evenly in three layers. , a pair of electrodes spaced 7mm, using a positive pulse power source 25Kv, power 50W.

[0023] The compressed air flow rate is 12L / min, and 4 liters of rhodamine B (Rhodamine B, C28H31ClN2O3) is selected as the sewage sample, and the effect test is carried out by the nanosecond pulse plasma discharge treatment equipment shown in the attached drawing. The steps are as follows:

[0024] 4 liters of rhodamine B reagents are passed into the reactor 1 and enter the clean water tank 12.

[0025] Turn on the air compressor pump to feed compressed air, turn on the circulation pump between the clean water outlet and the sewage inlet, turn on the pulse pow...

Embodiment 2

[0029] In this example, the power supply parameters are the same as in Example 1, and 4 liters of municipal garbage leachate is used as the test sample, and the test procedure is as in Example 1.

[0030] The initial concentration of COD in the municipal garbage leachate is 1040, and after being treated by the equipment of the present invention for 10 minutes, the COD is reduced by 70%, which can be further biochemically treated.

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Abstract

The invention belongs to the sewage treatment technology field, in particular relates to a device for treating refractory organic sewage with nanosecond pulse discharge plasma, comprising a tower reactor, a nanosecond pulse power supply and an air compressor pump which are connected by pipelines. The upper part of the tower reactor is provided with a water lattice, the middle part is provided with discharge electrodes, the bottom part is provided with a clear water tank, the top part is provided with a sewage inlet, and the bottom part is provided with a clear water outlet; the discharge electrodes of the middle part are connected with the external nanosecond pulse power supply, and the outer wall of the tower reactor is grounded; the lower part of the tower reactor is connected with the air compressor pump through a pipeline on which a gas-pressure meter is arranged, and the air compressor pump is provided with a reaction gas recovery port, the middle pipeline is provided with a one-way gas valve; and the air compressor pump is provided with an air inlet. The invention can effectively reduce the COD of organic waste water, improve BOD / COD, is good to biochemical degradation, can realize the discharge of organic waste water meeting standards and even the recycling use, is energy-saving, and has low treatment cost.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to equipment for treating refractory organic sewage with nanosecond pulse discharge plasma. Background technique [0002] High concentration of refractory organic matter contains many toxic and harmful substances, such as chlorophenol, polychlorinated biphenyl, etc., which have great harm to the environment and local residents. These sewages continue to accumulate through natural media such as water bodies and soils, constantly breaking the original balance of the ecosystem, and posing a huge threat to the environment on which human beings depend. It enters organisms through the food chain and gradually enriches, and finally enters the human body, endangering human health. Cause irreversible changes to human cells, induce carcinogenic, teratogenic, and mutagenic effects. At present, the conventional treatment methods for refractory organic wastewater at home a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78C02F1/32
Inventor 刘克富邱剑赵海洋
Owner FUDAN UNIV
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