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Catalytic ozone oxidation method for advanced treatment of industrial wastewater

A technology for industrial wastewater and advanced treatment, applied in chemical instruments and methods, oxidized water/sewage treatment, physical/chemical process catalysts, etc., can solve problems such as the cost disadvantage of fillers, overcome poor catalytic effect, and achieve cheap and easy-to-obtain materials. , the effect of improving the catalytic efficiency

Active Publication Date: 2015-11-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the electrochemical reduction method based on iron filings, this type of filler is at a disadvantage in terms of cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Choose the filler with iron and carbon as the main components and bake it under reducing atmosphere. And compound 5~25wt.%. The transition metals and their compounds are Cu, Mn, Co, Ni, Ti, Ag elemental metals, metal oxides, and compounds.

Embodiment 2

[0019] Weak strength and short-term modification of the raw materials described in Example 1: at a temperature of 30°C, 0.5mol / L of HNO 3 , Shaker reaction 0.50hr.

[0020] Characterization of modification: The reduction rate of nitrite in half an hour increased from about 5% before modification to 50%; the adsorption value of methylene blue increased from 15% to 35%.

[0021] Catalytic performance after modification: COD of the secondary biochemical effluent of a sewage treatment plant in a chemical industry park is 95mg / L. o 3 The residence time of catalytic oxidation pool is 20min; O 3 The dosage is 20mg / L. After the reaction, the COD is 80mg / L, and the COD removal rate after the catalysis reaches 15%, which is 10% higher than that before the catalysis.

Embodiment 3

[0023] The raw material described in Example 1 is modified in a medium-strength and short-term: at a temperature of 40°C, 1.0mol / L of HNO 3 , Shaker reaction 0.50hr.

[0024] Characterization of modification: The reduction rate of nitrite in half an hour increased from about 5% before modification to 55%; the adsorption value of methylene blue increased from 15% to 40%.

[0025] Catalytic performance after modification: COD of the secondary biochemical effluent of a sewage treatment plant in a chemical industry park is 100mg / L. o 3 The residence time of catalytic oxidation pool is 20min; O 3 The dosage is 20mg / L. After the reaction, the COD is 80mg / L, and the COD removal rate after catalysis reaches 20%, which is 15% higher than that before catalysis.

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Abstract

The invention relates to a catalytic ozone oxidizing method for industrial wastewater deep treatment. The method comprises the following steps: calcining raw material mainly containing iron and carbon in the reducing atmosphere to form iron-carbon filler, wherein the filler finished product is of particle shapes, has a particle diameter phi of 5-15mm, and comprises the following effective components in percentage by weight: 40-65 percent of reduction-state iron, 15-25 percent of carbon, 5-25 percent of transition metal; performing acid and oxidation modifying on the iron-carbon filler: reacting on a table for 0.5-5.0 hours in HNO3 with concentration of 0.5-5mol / L at 30-60 DEG C; forming a filling table by using the modified particles, arranging an ozone distribution device under the filling to form a catalytic zone reaction tank; catalyzing ozone to form an advanced oxidizing method in the neutral condition by using secondary bio-treated effluent as a processing object so as to deep remove organic matters out of the industrial waste water, wherien the hydraulic staying time is controlled to be 20-360min.

Description

technical field [0001] The invention relates to the field of water pollution control, in particular to a catalytic ozone oxidation method for advanced treatment of industrial wastewater. Background technique [0002] The application of ozone in water treatment has a long history. In the field of water supply treatment: as a disinfectant, ozone can effectively kill pathogenic microorganisms, and can avoid the chlorinated disinfection by-products produced during disinfection with chlorine gas. A mature ozone disinfection process has been formed; adding ozone at the front end of biological activated carbon can It plays the role of algae and deodorization, and at the same time, it oxidizes and decomposes the macromolecular organic matter existing in natural water bodies into small molecular organic matter, which helps the subsequent degradation of microorganisms in biological activated carbon, forming an ozone-biological activated carbon process. In the field of sewage treatmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/78B01J27/24
Inventor 马鲁铭
Owner TONGJI UNIV
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