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A series catalytic oxidation process for industrial organic wastewater treatment

A technology for catalytic oxidation and organic wastewater, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of increasing the difficulty of treatment, refractory biodegradation, and difficult treatment , to achieve the effect of improving processing efficiency, improving utilization efficiency and reducing operating costs

Inactive Publication Date: 2011-12-14
WUHAN TEXTILE UNIV
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  • Abstract
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Problems solved by technology

In the process of use, this method of simply using a single catalyst to catalyze and oxidize complex organic pollutants also has the phenomenon that the oxidant has different treatment activities for different organic pollutants, and the treatment types are limited. Industrial organic wastewater, Especially the organic wastewater in industrial parks has complex sources and components, and the organic pollutants in it are often refractory organic matter, which is difficult to treat and is refractory organic wastewater.
The COD in this part is usually greater than 2000mg / L, with a benzene ring structure, and a large proportion of stable organic pollutants, which increases the difficulty of treatment
Therefore, the method of combining multiple oxidation methods for treatment has gradually been applied in industrial practical applications, such as adding FeSO4 in the early stage, degrading the precipitate, and then performing oxidation of the oxidant, but for considering the synergistic effect between different oxidants, The process of improving the utilization rate of oxidant and improving the treatment effect has not been reported yet.

Method used

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  • A series catalytic oxidation process for industrial organic wastewater treatment
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Experimental program
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Effect test

Embodiment 1

[0018] Embodiment one: by above-mentioned technological process:

[0019]The organic wastewater is pharmaceutical wastewater, the index is: the treatment capacity is 1T, and the concentration is COD: 2000mg / L; the pretreatment of the organic wastewater includes the homogenization and aeration process of the wastewater and the neutralization coagulation sedimentation process, and the homogenization and aeration process The uniform and aeration tank is adopted, and the air aeration intensity is controlled by the uniform and aeration tank to 7m 3 / m 2 .h, fully homogeneous; the neutralization coagulation sedimentation process adopts a neutralization coagulation sedimentation tank, and a shut-off valve is used in the neutralization area to add slaked lime or hydrochloric acid or hydrochloric acid to adjust the pH value. % Coagulant aid PAC, the dosage is controlled at 8mg / L; most of the suspended solids and oil in the wastewater are removed through the pretreatment process.

[0...

Embodiment 2

[0022] Embodiment two: by above-mentioned technological process:

[0023] The organic wastewater is pharmaceutical wastewater, the index is: the treatment capacity is 1T, and the concentration is COD: 2000mg / L. The pretreatment of the organic wastewater includes the homogenization and aeration process of the wastewater and the neutralization coagulation sedimentation process, and the homogenization and aeration process Uniform and aeration tanks are used, and the uniform and aeration tank controls the air aeration intensity to 6m 3 / m 2 .h, fully homogeneous; the neutralization coagulation sedimentation process adopts a neutralization coagulation sedimentation tank, and a cut-off valve is used to add slaked lime or hydrochloric acid to adjust the pH value in the neutralization area, and the pH value is controlled at 6-9, followed by adding 0.5% auxiliary Coagulant PAC, the dosage is controlled at 5mg / L; most of the suspended solids and oil in the wastewater are removed throug...

Embodiment 3

[0026] Embodiment three: by above-mentioned technological process:

[0027] The organic wastewater is pharmaceutical wastewater, the index is: the treatment capacity is 1T, and the concentration is COD: 2000mg / L. The pretreatment of the organic wastewater includes the homogenization and aeration process of the wastewater and the neutralization coagulation sedimentation process, and the homogenization and aeration process Uniform and aeration tanks are used, and the uniform and aeration tanks control the air aeration intensity to 1m 3 / m 2 .h, fully homogeneous; the neutralization coagulation sedimentation process adopts a neutralization coagulation sedimentation tank, and a cut-off valve is used to add slaked lime or hydrochloric acid to adjust the pH value in the neutralization area, and the pH value is controlled at 6-9, followed by adding 0.5% auxiliary Coagulant PAC, the dosage is controlled at 1mg / L; most of the suspended solids and oil in the wastewater are removed thro...

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Abstract

The invention relates to a series catalytic oxidation process for treating industrial organic wastewater, which belongs to the technical field of environmental protection. The serial catalytic oxidation treatment process of industrial organic wastewater of the present invention adopts the serial and synergistic mode of catalytic ozonation and catalytic hydrogen peroxide hydration for pretreated industrial organic wastewater, and realizes synergy among oxidants and rapid treatment of complex organic pollutants. deal with. In the first catalytic oxidation process, ozone catalytic oxidation generates a large number of hydroxyl radicals, which oxidize and decompose organic matter in wastewater; the remaining ozone and remaining organic pollutants enter the second hydrogen peroxide catalytic decomposition process to degrade organic pollutants and activate The degradation effect of hydrogen peroxide and ozone is realized, and the synergistic reaction achieves the purpose of rapidly degrading organic pollutants. The serial catalytic oxidation process of the present invention for treating industrial organic wastewater not only improves the treatment capacity of refractory organic pollutants, but also improves the utilization efficiency of oxidants, and can effectively reduce operating costs.

Description

technical field [0001] The invention relates to a series catalytic oxidation process for treating industrial organic wastewater, which belongs to the technical field of environmental protection. Background technique [0002] Wastewater from industrial parks is difficult to treat, with complex sources and components. The organic pollutants in it are often refractory to biodegradable organic matter, which is difficult to treat. The COD in this part is usually greater than 2000mg / L, with a benzene ring structure, and a large proportion of stable organic pollutants, which increases the difficulty of treatment. Currently, industrial park wastewater is treated with a single oxidant: H 2 o 2 Catalytic oxidation method or O 3 Catalytic oxidation method, which oxidizes and decomposes organic matter in wastewater into small molecule organic matter or CO 2 and H 2 O, thereby removing organic pollutants in wastewater. The traditional chemical oxidation method often cannot achieve ...

Claims

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Application Information

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IPC IPC(8): C02F9/04
Inventor 夏东升曾庆福杨俊阮新潮杨小俊
Owner WUHAN TEXTILE UNIV
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