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Iron-carbon inner electrolysis-Fenton oxidation-electrolytic electrocatalytic oxidation combined wastewater treatment method and device

An electrolytic catalytic oxidation and electrocatalytic oxidation technology, applied in the field of composite treatment, can solve problems such as limiting the practical application of wastewater treatment, and achieve the effects of improving biodegradability, saving resources, and feasible operation

Inactive Publication Date: 2015-07-15
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] These three wastewater treatment methods have been widely studied, but each has some shortcomings that limit the practical application of wastewater treatment

Method used

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  • Iron-carbon inner electrolysis-Fenton oxidation-electrolytic electrocatalytic oxidation combined wastewater treatment method and device

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Experimental program
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Effect test

Embodiment 1

[0027] 1. Put 1L of waste water with an initial COD content of 32000mg / L and BOD / COD less than 0.1 into the inner electrolysis packed tower by an air pump. The filler uses self-made mixed particles with a volume ratio of iron and carbon of 1:1, and adjusts the pH to 2.5. Aeration, after treatment; through the Fenton pool, add 20g H 2 o 2 Solution, adjust the pH to 2 for oxidation reaction, after the reaction is completed; enter the electrolytic cell for electrolytic oxidation, the electrolytic anode material is made of titanium-based doped Pr metal oxide material, the preparation method refers to Z.He, C.Huang, Q . Wang, Z. Jiang, J. Chen, S. Song, Int. J. Electrochem. Sci. 6 (2011) 4341–4354. Control the current density, electrolysis voltage, adjust the electrolysis process, and the treatment is completed; adjust the pH to 8.5, and discharge through the effluent pool after the coagulation and sedimentation process is completed in the effluent coagulation sedimentation tank. ...

Embodiment 2

[0029] Put 1L of waste water with an initial COD content of 33000mg / L and BOD / COD less than 0.1 into the inner electrolytic packing tower by an air pump. The filler uses self-made mixed particles with a volume ratio of iron to carbon of 1:2.5, adjusts the pH to 2.5, and aerates , after the treatment is completed; through the Fenton oxidation process, add 20g H 2 o 2 Solution, adjust the pH to 3, after the reaction is complete; carry out electrolysis, the electrolysis anode material adopts the titanium-based doped Bi metal oxide material made by oneself, and the preparation method refers to C.A.Martínez-Huitle, E.Brillas, Appl.Catal.B:Environ .87 (2009) 105–145. Control the current density and electrolysis voltage, adjust the electrolysis process, and the treatment is completed; adjust the pH to 8, and the coagulation and precipitation process is completed. The COD content of the effluent is 8200mg / L, the COD removal rate is 75.2%, and the BOD / COD is 0.38.

Embodiment 3

[0031] Put 1L of waste water with an initial COD content of 34000mg / L and BOD / COD less than 0.1 into the inner electrolysis packing tower by an air pump. The filler uses self-made mixed particles with an iron-carbon volume ratio of 1:5, adjusts the pH to 2.5, and aerates , after the treatment is completed; through the Fenton oxidation process, add 20g H 2 o 2 Solution, adjust the pH to 6, after the reaction is completed; carry out electrolysis, the electrolysis anode material adopts titanium-based doped Ta metal oxide and Pr metal oxide materials made by oneself, and the preparation method refers to G.Chen, Sep.Purif.Technol.38 (2004) 11–41., the mass ratio of Ta metal oxide and Pr metal oxide is 2:1. Control the current density, electrolysis voltage, adjust the electrolysis process, and the treatment is completed; adjust the pH to 8.5, and the coagulation and precipitation process is completed. The COD content of the effluent is 7400mg / L, the COD removal rate is 78.2%, and ...

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Abstract

The invention relates to an iron-carbon inner electrolysis-Fenton oxidation-electrolytic electrocatalytic oxidation combined wastewater treatment method and device. According to the invention, iron-carbon inner electrolysis-Fenton oxidation-electrolytic electrocatalytic oxidation is adopted. Wastewater is subjected to iron-carbon inner electrolysis in an iron-carbon inner electrolysis filling material tower, and is subjected to Fenton-method treatment, such that residual Fe<2+> in the solution obtained after iron-carbon inner electrolysis is subjected to a sufficient oxidation reaction; an electrolytic electrocatalytic oxidation reaction is carried out, such that heterocyclic organics in the wastewater are thoroughly decomposed. The method causes no secondary pollution. With the method, various organics in high-salt wastewater can be highly efficiently degraded, a COD removal rate can be higher than 75%, and biodegradable BOD5 / CODcr is increased from 0.03 to higher than 0.3, such that biodegradability is substantially improved. Outlet water has the advantages of low salt content, low chromaticity and low ammonia nitrogen content.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to a composite treatment of waste water containing pyridine, cyanide, alkanes, benzoquinones, imidazolones, and high-salt water by using iron-carbon internal electrolysis-Fenton oxidation-electrolytic electrocatalytic oxidation method Approach. Background technique [0002] The national industry discharges about 100 million tons of wastewater every year. Wastewater has the characteristics of high concentration of organic matter, high toxicity, complex pollutant components, many refractory biodegradable substances, and frequent fluctuations in water quality and quantity. Among them, those that have been processed account for 7% of the total, and those that meet the standards only account for 1% of the processed ones. These wastewaters are discharged into rivers and rivers, which directly cause the total phosphorus and ammonia nitrogen in the environment to exceed the ...

Claims

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Application Information

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IPC IPC(8): C02F9/08C02F1/72
Inventor 王怡红姚琛田亮章仟益
Owner SOUTHEAST UNIV
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