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Catalytic ozone oxidizing method for industrial wastewater deep treatment

A technology for advanced treatment of industrial wastewater, applied in chemical instruments and methods, oxidized water/sewage treatment, physical/chemical process catalysts, etc., can solve the problems of low cost of fillers, etc., to overcome poor catalytic effect, simple and reliable process, and improve The effect of catalytic efficiency

Active Publication Date: 2014-09-10
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 in a reducing atmosphere. Metals and compounds 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, 0.5 mol / L of HNO 3 , shaker reaction 0.50 hr.

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

Embodiment 3

[0023] Medium-intensity, short-term modification of the raw material described in Example 1: at a temperature of 40°C, 1.0 mol / L of HNO 3 , shaker reaction 0.50 hr.

[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 100 mg / L. o 3 The residence time of catalytic oxidation pool is 20min; O 3 The dosage is 20mg / L. After the reaction, the COD was 80 mg / L, and the COD removal rate after catalysis was 20%, which was 15% higher than that before catalysis.

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PUM

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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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IPC IPC(8): C02F1/78B01J27/24
Inventor 马鲁铭
Owner TONGJI UNIV
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