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Nanosecond pulse discharge plasma treatment equipment for refractory organic sewage

A discharge plasma and nanosecond pulse technology, which is applied in the fields of plasma, light water/sewage treatment, oxidized water/sewage treatment, etc. problem, to achieve the effect of low treatment cost, favorable for subsequent biochemical degradation, and favorable biochemical degradation

Inactive Publication Date: 2012-02-08
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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  • Nanosecond pulse discharge plasma treatment equipment for refractory organic sewage
  • Nanosecond pulse discharge plasma treatment equipment for refractory organic sewage

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 technical field of sewage treatment, in particular to a device for treating refractory organic sewage with nanosecond pulse discharge plasma. The equipment consists of a tower reactor, a nanosecond pulse power source, and a gas compression pump connected by pipelines; the upper part of the tower reactor is a water grid, the middle part is a discharge electrode, the bottom is a clean water tank, the top is equipped with a sewage inlet, and the bottom is set There is a clean water outlet; the discharge electrode in the middle is connected to an external nanosecond pulse power source, and the outer wall of the tower reactor is grounded; the lower part of the tower reactor is connected to an air compression pump through a pipeline, and the pipeline is equipped with a barometer, and the air is compressed The pump is provided with a reaction gas recovery port, the middle pipe is provided with a one-way air valve, and the air compression pump is provided with an air inlet. The invention can effectively reduce COD of organic waste water, increase BOD / COD, facilitate biochemical degradation, realize up-to-standard discharge and even recycling of refractory organic waste water, and is energy-saving and low in 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 Patents(China)
IPC IPC(8): H05H1/18C02F1/78C02F1/32
Inventor 刘克富邱剑赵海洋
Owner FUDAN UNIV