Method for deeply transforming perchlorate contained in water through synergistic effect of electrochemistry and biological hydrogen autotrophy and reactor

A perchlorate, electrochemical technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of plant growth difficulties, flammable and explosive hydrogen, soil salt Alkalization and other problems, to achieve the effect of expanding processing capacity, high current efficiency, and fast reaction speed

Active Publication Date: 2015-08-19
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, hydrogen has the problems of being flammable and explosive, difficult to transport, and low solubility.
It should be pointed out that for the biological reduction of perchlorate technology, the product of perchlorate reduction is chloride ions, and the presence of high concentrations of chloride ions in aqueous solutions will still cause bitter and salty water, soil salinization, and pipelines. Corrosion, difficult plant growth, etc.

Method used

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  • Method for deeply transforming perchlorate contained in water through synergistic effect of electrochemistry and biological hydrogen autotrophy and reactor
  • Method for deeply transforming perchlorate contained in water through synergistic effect of electrochemistry and biological hydrogen autotrophy and reactor

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Embodiment 1

[0017] The effective volume of the cathode compartment of the reactor is 600 mL. The porous nickel plate is used as the cathode and the titanium ruthenium mesh is used as the anode. The hydrogen autotrophic perchlorate degraded sludge concentration in the cathode compartment is maintained at 5000 mg / L. The applied current is 50 mA. 4 - When the initial concentration is 10mg / L and the residence time is 11h, the reactor ClO 4 - The removal rate is more than 90%, and the active chlorine conversion rate is more than 95%.

Embodiment 2

[0019] The effective volume of the cathode compartment of the reactor is 600 mL. The stainless steel plate is used as the cathode and the titanium ruthenium mesh is used as the anode. The hydrogen autotrophic perchlorate sludge concentration in the cathode chamber is maintained at 1000 mg / L. The applied current is 100 mA. When ClO 4 - Initial concentration 10mg / L, residence time 8h, reactor ClO 4 - The removal rate>95%, the conversion rate of active chlorine>98%, and there is no accumulation of intermediate products.

Embodiment 3

[0021] A continuous degassing internal circulation reactor is adopted, titanium plate is used as cathode, titanium ruthenium mesh is used as anode, the effective volume of the cathode chamber of the reactor is 600 mL, the concentration of hydrogen autotrophic perchlorate degradation sludge in the cathode chamber is 1000 mg / L, and the applied current is 50 mA. When ClO 4 - When the initial concentration is 20mg / L, the internal circulation ratio is 0.5, and the residence time is 16h, the reactor ClO 4 - The removal rate>95%, the conversion rate of active chlorine>98%, and there is no accumulation of intermediate products.

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Abstract

The invention relates to a method for deeply transforming water pollutant perchlorate and a reactor, and belongs to the field of application of a water treatment technology. According to a technical principle, electrochemical reaction and microbial hydrogen autotrophy are organically combined; the perchlorate is firstly reduced into a chloride ion under the action of a cathode producing hydrogen and hydrogen autotrophic bacteria through electrolysis, then the chloride ion is oxidized into active chlorine under the action of electrochemical anodic oxidation, so that the deep transformation from the perchlorate to the chloride ion to the active chlorine is realized. The method disclosed by the invention can be used for thoroughly transforming the perchlorate into the active chlorine by organically combining the process with microbial hydrogen autotrophy reduction by sufficiently utilizing two aspects of reaction, namely electrochemical cathodic reduction and anodic oxidation, and can be used for further enhancing the quality of effluent water because the active chlorine has bactericidal effect. The method disclosed by the invention can be used for sufficiently overcoming the defects of non-thorough perchlorate transformation of the tradition biological technology and the like and realizing the thorough transformation of the perchlorate. The reactor disclosed by the invention has the advantages of high time and space efficiency and easy management and maintenance.

Description

Technical field [0001] The invention relates to a method for removing perchlorate in water and belongs to the application field of water treatment technology. The present invention proposes a method and reactor for the deep removal of perchlorate from water by the synergistic effect of electrochemistry and biohydrogen autotrophic action. Specifically, the electrochemical reaction is organically combined with microbial hydrogen autotrophic. Perchlorate is first electrolyzed at the cathode Hydrogen-producing and hydrogen-autotrophic bacteria are reduced to chloride ions, and then chloride ions are oxidized under the action of electrochemical anodization to generate active chlorine. Active chlorine has the function of sterilizing and improving water quality, thereby realizing perchlorate → Chlorine ion → deep conversion of active chlorine. technical background [0002] At present, due to the development of modern industry, perchlorate-containing substances are widely used. They are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 万东锦牛振华肖书虎刘永德王依依张健
Owner HENAN UNIVERSITY OF TECHNOLOGY
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