Method for continuously processing degradation-resistant wastewater by means of microwave catalysis

A technology for wastewater treatment and refractory degradation, applied in the direction of light water/sewage treatment, etc., can solve the problems of small amount of treated water, difficult solid-liquid separation, short service life of catalysts, etc., to achieve large treatment capacity, improve treatment efficiency, and increase treatment capacity Effect

Inactive Publication Date: 2013-12-04
SICHUAN UNIV
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  • Abstract
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Problems solved by technology

[0006] In view of the deficiencies in the existing technology of using microwaves and carbon-based catalysts to treat refractory wastewater, the first purpose of the present invention is to provide a method for catalytically and continuously treating refractory wastewater under microwaves. The second purpose of the present invention is to provide a An implementation device for catalytically and continuously treating refractory wastewater under microwaves to solve the problems of difficult solid-liquid separation, small amount of treated water, and short service life of catalysts in the treatment of refractory wastewater in the prior art

Method used

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  • Method for continuously processing degradation-resistant wastewater by means of microwave catalysis

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Effect test

Embodiment 1

[0022] The walnut shell is ground and carbonized to make carbonized material mixed with binder, which is molded in a molding machine, dried and activated, and then cut into granular activated carbon catalysts with a diameter of about 2mm.

[0023] The above granular activated carbon catalyst was filled into a quartz tube with a diameter of 24 mm to a height of 80 mm to form a fixed bed of granular activated carbon catalyst. A fixed bed of granular activated carbon catalyst was set perpendicular to the microwave direction and the ground in a microwave field with a microwave power of 500 W. The 2000mg / l simulated ammonia nitrogen wastewater was passed into the fixed bed at a flow rate of 20ml / min. The ammonia nitrogen concentration before and after treatment was determined by Nessler reagent spectrophotometry. The ammonia nitrogen concentration after treatment was 140 mg / l, and the ammonia nitrogen removal rate was 94%; after the same batch of granular activated carbon was conti...

Embodiment 2

[0025] The walnut shell is ground and carbonized to make carbonized material mixed with binder, which is molded in a molding machine, dried and activated, and then cut into granular activated carbon catalysts with a diameter of about 2mm.

[0026] The above granular activated carbon catalyst was filled into a quartz tube with a diameter of 24 mm to a height of 80 mm to form a fixed bed of granular activated carbon catalyst. A fixed bed of granular activated carbon catalyst was set perpendicular to the microwave direction and the ground in a microwave field with a microwave power of 500 W. The 2000mg / l simulated ammonia nitrogen wastewater was passed into the granular activated carbon column at a flow rate of 40ml / min. The ammonia nitrogen concentration before and after treatment was measured by Nessler reagent spectrophotometry, and the ammonia nitrogen removal rate was 91%.

Embodiment 3

[0028]The walnut shell is ground and carbonized to make carbonized material mixed with binder, which is molded in a molding machine, dried and activated, and then cut into granular activated carbon catalysts with a diameter of about 2mm.

[0029] The above granular activated carbon catalyst was filled into a quartz tube with a diameter of 24 mm to a height of 80 mm to form a fixed bed of granular activated carbon catalyst. The granular activated carbon catalyst fixed bed was set perpendicular to the microwave direction and the ground in a microwave field with a microwave power of 800 W. The actual coking wastewater was passed through the granular activated carbon column at a flow rate of 20 ml / min. The ammonia nitrogen concentration before and after the reaction was determined by Nessler reagent spectrophotometry. The ammonia nitrogen concentration before the reaction was 6270 mg / L, and the concentration after the reaction was 420 mg / L. The ammonia nitrogen removal efficiency ...

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Abstract

The invention discloses a method for continuously processing degradation-resistant wastewater by means of microwave catalysis and an implementation device thereof. Granular catalyst is filled into quartz tubes to form quartz tube catalyst columns; the quartz tube catalyst columns are placed into a microwave field to form catalyst fixing beds, wherein the intersection angle of the axial direction of the quartz tube catalyst columns and the direction of the irradiation microwave is not less than 45 degrees; wastewater to be processed continuously flows through the catalyst fixing beds, so that pollutants in the wastewater can be removed under the combined action of the microwave and the granular catalyst; processed water and gas produced during wastewater treatment are discharged; the granular catalyst is husk-like granular activated carbon prepared through carbonization, smashing, bonding formation and carbon dioxide activating treatment. With adoption of the method, continuous industrialized degradation of degradation-resistant wastewater can be realized, the operation is simple, the automatic control is facilitated, the application to different wastewater processing amounts can be realized by means of increasing or decreasing the number of the quartz tube catalyst columns, the investment and the operation cost are low, and the removal efficiency is high.

Description

technical field [0001] The invention relates to wastewater purification and treatment technology, and more particularly, to a process method and an implementing device for continuously treating refractory wastewater by using microwaves and catalyst fixed beds. Background technique [0002] Wastewater generated in the process of living and production, especially the wastewater that is difficult to degrade and treat, seriously pollutes the living environment of people and brings great harm to people's health. Wastewater has always been a major survival issue faced by people. [0003] High-concentration ammonia nitrogen wastewater is a kind of refractory wastewater. At present, stripping process is often used in industry to treat ammonia nitrogen wastewater with obvious effect. However, the implementation of this method is huge, requires a large amount of steam to operate, and has high operating costs. Some researchers have begun to use microwave irradiation to treat wastewate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30
Inventor 蒋文举彭丽
Owner SICHUAN UNIV
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