Method for water treatment through ozone oxidation catalyzed by hydroxyl iron oxide

A technology of iron oxyhydroxide and ozone oxidation, applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem of insufficient contact between solid catalyst and sewage, and achieve full and thorough catalysis Effects of oxidation, prolongation of time, and increased chance of contact

Inactive Publication Date: 2018-03-09
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Therefore, the technical problem to be solved in the present invention is to overcome the problem of insufficient contact between solid catalyst and sewage in the existing heterogeneous catalytic ozonation reaction system, thereby providing a method that can ensure full contact between catalyst and sewage and COD removal efficiency Catalytic ozonation water treatment method with high efficiency and simplified treatment steps

Method used

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  • Method for water treatment through ozone oxidation catalyzed by hydroxyl iron oxide
  • Method for water treatment through ozone oxidation catalyzed by hydroxyl iron oxide
  • Method for water treatment through ozone oxidation catalyzed by hydroxyl iron oxide

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The specific surface area is 226m 2 / g, the iron oxyhydroxide with particle diameter of Φ2mm is filled in two fixed-bed reactors connected in series with a height-to-diameter ratio of 8:1, such as figure 1 As shown, ozone is continuously introduced into the sewage to be treated with a COD concentration value of 1300mg / L. Ozone is generated by oxygen through an ozone generator, and the ozone flow rate is 60mL / min; Pass it into the aforementioned fixed-bed reactor, and monitor the COD concentration values ​​at the outlets of the two fixed-beds when reacting for 1h, 2h, and 9h. The monitoring results are shown in Table 1.

[0036] Table 1

[0037]

[0038] It can be seen from the above table 1 that after two stages of fixed beds, the COD concentration of sewage is greatly reduced, and after 2 hours, it is lower than 100mg / L, which can reach the discharge standard.

Embodiment 2

[0040] The specific surface area is 180m 2 / g, the iron oxyhydroxide particle size of Φ1mm is packed in two fixed-bed reactors connected in series with a height-to-diameter ratio of 6:1, such as figure 1 As shown, ozone is continuously introduced into the sewage to be treated with a COD concentration value of 800mg / L. Ozone is generated by oxygen through an ozone generator, and the ozone flow rate is 30mL / min; Pass it into the aforementioned fixed-bed reactor, and monitor the COD concentration values ​​at the outlets of the two fixed-beds when reacting for 1h, 2h, and 9h. The monitoring results are shown in Table 2.

[0041] Table 2

[0042]

[0043] It can be seen from the above table 2 that after two stages of fixed beds, the COD concentration of sewage is greatly reduced, and after 2 hours, it is lower than 100mg / L, which can meet the discharge standard.

Embodiment 3

[0045] The specific surface area is 239m 2 / g, particle size of Φ3mm ferric oxyhydroxide is filled in two fixed-bed reactors connected in series with a height-to-diameter ratio of 7:1, such as figure 1As shown, ozone is continuously introduced into the sewage to be treated with a COD concentration value of 1000mg / L. Ozone is generated by oxygen through an ozone generator, and the ozone flow rate is 45mL / min; Pass it into the aforementioned fixed-bed reactor, and monitor the COD concentration values ​​at the outlets of the two fixed-beds when reacting for 1h, 2h, and 9h. The monitoring results are shown in Table 3.

[0046] table 3

[0047]

[0048] It can be seen from the above table 3 that after two stages of fixed bed, the COD concentration of sewage is greatly reduced, and after 2 hours, it is lower than 100mg / L, which can reach the discharge standard.

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Abstract

The invention belongs to the technical field of water treatment and discloses an ozone oxidation water treatment method with high-specific-area hydroxyl iron oxide as a catalyst. The method includes:(1) continuously feeding ozone into sewage; (2) feeding the sewage treated in the step (1) into a fixed bed reactor filled with hydroxyl iron oxide. The method for water treatment through ozone oxidation catalyzed by hydroxyl iron oxide has advantages that by feeding the sewage continuously fed with ozone into the fixed bed reactor filled with hydroxyl iron oxide, organic pollutant components andozone in water can be completely contacted with the catalyst while a step of catalyst separation is saved, so that COD (chemical oxygen demand) removal efficiency can be improved while treatment procedures are simplified, and large-scale continuous water treatment requirements can be met.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an ozone oxidation water treatment method using high specific surface iron oxyhydroxide as a catalyst. Background technique [0002] With the progress of society and the development of industrial and agricultural economy, the discharge of sewage containing organic pollutants is increasing, especially the sewage from chemical, chemical, pesticide, printing and dyeing industries, which contains a variety of aromatic substances that are highly toxic and difficult to degrade The components of organic pollutants pose a great threat to the ecological environment and human life safety and health; among them, phenol, an organic pollutant, has been listed as one of the priority pollutants by the US Environmental Protection Agency. Therefore, how to effectively treat this kind of wastewater has attracted people's attention. [0003] Advanced oxidation technology refers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78C02F101/30
Inventor 王立贤樊俐王鲁璐崔永君
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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