Method for electrolysis-catalytic oxidation joint treatment on salt-containing organic wastewater

A technology of organic wastewater and catalytic oxidation, which is applied in the fields of oxidized water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc. safe effect

Inactive Publication Date: 2010-09-29
NANJING UNIV OF TECH
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  • Abstract
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Problems solved by technology

However, these methods undoubtedly increase the process and the processing cost is relatively high.

Method used

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  • Method for electrolysis-catalytic oxidation joint treatment on salt-containing organic wastewater
  • Method for electrolysis-catalytic oxidation joint treatment on salt-containing organic wastewater
  • Method for electrolysis-catalytic oxidation joint treatment on salt-containing organic wastewater

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Embodiment 1

[0029] Pass 10L of high-salt organic wastewater with an initial COD of 10,000 mg / L into the electrolytic cell, adjust the voltage to 20V, and electrolyze for 20 minutes. Use a peristaltic pump to pump the electrolyzed wastewater into a fixed-bed reactor with 120g of catalyst at a space velocity of 1.6h -1 Continuous flow through the bed for catalytic oxidation reaction. The results are compared with the high-salt wastewater with a certain amount of sodium hypochlorite as an oxidant that is directly catalyzed and oxidized through a fixed bed.

[0030] In the comparative direct oxidation treatment by sodium hypochlorite, the amount of sodium hypochlorite added is determined by the initial COD value of high-salt organic wastewater. Usually calculated as follows:

[0031]

[0032] In practical applications, use 1.2 times the calculation amount.

[0033] COD was determined by the national standard GB11914-89 dichromate method in wastewater. The formula for calculating COD re...

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Abstract

The invention discloses a method for electrolysis-catalytic oxidation joint treatment on salt-containing organic wastewater, which can effectively utilize salt content in the organic wastewater, treat wastes with wastes and has the characteristics of stable effect, low cost, easy industrial application and the like while meeting the treatment requirements. The method for electrolysis-catalytic oxidation joint treatment on salt-containing organic wastewater comprises the following main steps: adding high-salt organic wastewater into an electrolytic bath to electrolyze for 20-140min; introducing the electrolyzed wastewater into a fixed bed reactor filled with catalysts; and continuously flowing the wastewater through a bed layer at the airspeed of 1.6-2.4h<-1> for a catalytic oxidation reaction.

Description

technical field [0001] The invention relates to a treatment method for industrial waste water, and more specifically to a method for combined electrolysis-catalytic oxidation treatment of salt-containing organic waste water. Background technique [0002] With the development of my country's industry, the wastewater discharged by many industries and enterprises is becoming more and more complex, especially the large amount of wastewater produced in chemical production such as pesticides, dyes, and pharmaceuticals. In addition to the characteristics of heavy weight, it also contains high concentrations of salt substances, which is one of the difficulties in water treatment at present. [0003] At present, methods such as incineration, reverse osmosis, ion exchange, and distillation are mostly used to treat such wastewater. The incineration method is widely used abroad. Japan (JP-A-49-46576) proposes to adopt a vertical quenching incineration method, which needs to be carried ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F1/461C02F1/72
Inventor 梅华贾苏惠邓海燕郑平
Owner NANJING UNIV OF TECH
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