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Biomass conductive carbon double-fluidized-bed electrode reactor for treating low-concentration metallic wastewater

An electrode reactor and double fluidized bed technology, applied in chemical instruments and methods, adsorption water/sewage treatment, chemical/physical processes, etc., can solve the problems of slow metal ion reduction deposition rate and limited capacity, and achieve electrical conductivity Good, strong adsorption capacity, high current density effect

Inactive Publication Date: 2011-07-06
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the concentration of metal ions is very low, the rate of metal ion reductive deposition is very slow, so the conventional fluidized bed electrode has very limited ability in the treatment of low concentration metal wastewater

Method used

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  • Biomass conductive carbon double-fluidized-bed electrode reactor for treating low-concentration metallic wastewater
  • Biomass conductive carbon double-fluidized-bed electrode reactor for treating low-concentration metallic wastewater

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Experimental program
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Effect test

Embodiment 1

[0044] The cross-section of the wastewater purification reaction bed of the biomass conductive carbon double fluidized bed electrode reactor is a square of 0.4m×0.4m, and the height is 0.6m. The cross-section of the anode reaction zone is 0.4m×0.09m, the cross-section of the cathode reaction zone is 0.4m×0.3m, the insulating permeable diaphragm is a glass fiber plate with a thickness of 0.01m, and the inclination angle between the inclined distribution plate and the horizontal plane is 30°. The treated wastewater is copper-containing electroplating wastewater, the concentration of copper ions is 5.3mg / L, and the liquid flow rate is 4m 3 / h. The cathode and anode voltage of the fluidized bed electrode for wastewater purification is 3V; the cathode feeding electrode is three uniformly arranged 0.35m×0.50m pure copper plates with a thickness of 5mm; the anode is a piece of lead-antimony alloy with a size of 0.35m×0.50m and a thickness of 5mm. In the cathode reaction zone of the...

Embodiment 2

[0049] The cross-section of the wastewater purification reaction bed of the biomass conductive carbon double fluidized bed electrode reactor is a square of 0.4m×0.4m, and the height is 0.6m. The cross-section of the anode reaction zone is 0.4m×0.09m, the cross-section of the cathode reaction zone is 0.4m×0.3m, the insulating permeable diaphragm is a glass fiber plate with a thickness of 0.01m, and the inclination angle between the inclined distribution plate and the horizontal plane is 30°. The treated wastewater is copper-containing electroplating wastewater, the copper ion concentration is 2.1mg / L, and the liquid flow rate is 3.5m 3 / h. The negative and positive pole voltage of the fluidized bed electrode for wastewater purification is 5V; the cathode feeding electrode is three uniformly arranged 0.35m×0.50m pure copper plates with a thickness of 5mm; the anode is a piece of lead-antimony alloy with a size of 0.35m×0.50m and a thickness of 5mm. The particle size of biomass...

Embodiment 3

[0054] The cross-section of the wastewater purification reaction bed of the biomass conductive carbon double fluidized bed electrode reactor is a square of 0.4m×0.4m, and the height is 0.6m. The cross-section of the anode reaction zone is 0.4m×0.09m, the cross-section of the cathode reaction zone is 0.4m×0.3m, the insulating permeable diaphragm is a glass fiber plate with a thickness of 0.01m, and the inclination angle between the inclined distribution plate and the horizontal plane is 30°. The treated wastewater is silver-containing wastewater with a silver ion concentration of 0.9mg / L and a liquid flow rate of 2.5m 3 / h. The negative and positive voltage of the fluidized bed electrode for wastewater purification is 20V; the cathode feeding electrode is three uniformly arranged 0.35m×0.50m pure copper plates with a thickness of 5mm; the anode is a piece of lead-antimony alloy with a size of 0.35m×0.50m and a thickness of 5mm. The particle size of biomass conductive carbon p...

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Abstract

The invention discloses a biomass conductive carbon double-fluidized-bed electrode reactor for treating low-concentration metallic wastewater. The electrode reactor comprises a wastewater purifying reaction bed and a metal recovering reaction bed, wherein the wastewater purifying reaction bed comprises a purifying reaction bed body, a wastewater header, a fluidized distribution pipe and a first DC converter; the metal recovering reaction bed comprises a metal recovering reaction bed body, an air chamber header, a fluidizing air pipe and a second DC converter. Compared with the prior art, the electrode reactor adopts biomass conductive carbon to replace conventional metal particles or active carbon and also has the advantages of metal and the active carbon. On one hand, the biomass conductive carbon has good electric conductivity, and the fluidized bed electrode reactor formed by using the biomass conductive carbon has high current density; on the other hand, the specific surface area of the conductive carbon is large, thus the conductive carbon has strong adsorption capacity and can adsorb metal ions first and then reduce the metal ions so as to greatly improve the current efficiency, and the conductive carbon is particularly effective for wastewater containing metal ions.

Description

Technical field: [0001] The invention relates to a biomass conductive carbon dual-fluidized bed electrode device for treating low-concentration metal wastewater and a method for efficiently recovering metal, and is particularly suitable for treating industrial wastewater with low metal ion content and high metal recovery value. The invention belongs to the technical field of electrochemical treatment of industrial wastewater by fluidized bed electrodes. Background technique: [0002] my country's manufacturing industry is developed, and the discharge of industrial wastewater ranks first in the world. Industrial wastewater (such as metallurgy, electroplating, precious metal processing, printing and dyeing, leather and other industrial wastewater) usually contains a large amount of metal ions, such as gold, silver, copper, lead, cadmium, chromium, zinc, etc. Although the concentration of these metal ions in wastewater is very low, due to their great harm to the environment an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F1/469B01J8/26
Inventor 肖刚金保升左武
Owner SOUTHEAST UNIV