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Method for pre-treating Fischer-Tropsch synthesis wastewater through catalytic ozone oxidation

A technology for Fischer-Tropsch synthesis of wastewater and ozone oxidation, which is applied in oxidation water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc. Reduce COD, good effect

Inactive Publication Date: 2019-11-29
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the treatment of Fischer-Tropsch synthetic wastewater mainly has three steps: pretreatment, biochemical treatment, and advanced treatment. Good, but because the COD is too high, after three steps of treatment, the standard effluent still cannot be obtained

Method used

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  • Method for pre-treating Fischer-Tropsch synthesis wastewater through catalytic ozone oxidation
  • Method for pre-treating Fischer-Tropsch synthesis wastewater through catalytic ozone oxidation
  • Method for pre-treating Fischer-Tropsch synthesis wastewater through catalytic ozone oxidation

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Effect test

Embodiment 1

[0031] A method for catalytic ozonation pretreatment of Fischer-Tropsch synthesis wastewater, comprising the steps of:

[0032] Take 100mL of Fischer-Tropsch synthetic wastewater with a COD concentration of 10000mg / L, put it into a reaction device with a capacity of 250ml, and weigh the powdered MnO 2 Catalyst 0.1g is put into reaction device, and reaction device access ozone output is the ozone generator of 10g / h, quantitatively feeds ozone in reaction device. Samples were taken at 30 min, 60 min, 90 min, and 120 min of reaction, and the samples were filtered through needle filters to obtain processed samples. The COD concentration of the treated sample was measured according to the potassium dichromate titration method (GB11914-89), and finally the COD removal efficiency of the Fischer-Tropsch synthesis wastewater was calculated. The result is as figure 1 shown.

Embodiment 2

[0034] A method for catalytic ozonation pretreatment of Fischer-Tropsch synthesis wastewater, comprising the steps of:

[0035] Take 100mL of Fischer-Tropsch synthetic wastewater with a COD concentration of 10000mg / L, put it into a reaction device with a capacity of 250ml, and weigh the powdered MnO 2 Catalyst 0.2g is put into reaction device, and reaction device access ozone output is the ozone generator of 10g / h, quantitatively feeds ozone in reaction device. Samples were taken at 30 min, 60 min, 90 min, and 120 min of reaction, and the samples were filtered through needle filters to obtain processed samples. The COD concentration of the treated sample was measured according to the potassium dichromate titration method (GB11914-89), and finally the COD removal efficiency of the Fischer-Tropsch synthesis wastewater was calculated. The result is as figure 1 shown.

Embodiment 3

[0037] A method for catalytic ozonation pretreatment of Fischer-Tropsch synthesis wastewater, comprising the steps of:

[0038] Take 100mL of Fischer-Tropsch synthetic wastewater with a COD concentration of 10000mg / L, put it into a reaction device with a capacity of 250ml, and weigh the powdered MnO 2 Catalyst 0.3g is put into reaction device, and reaction device access ozone output is the ozone generator of 10g / h, quantitatively feeds ozone in reaction device. Samples were taken at 30 min, 60 min, 90 min, and 120 min of reaction, and the samples were filtered through needle filters to obtain processed samples. The COD concentration of the treated sample was measured according to the potassium dichromate titration method (GB11914-89), and finally the COD removal efficiency of the Fischer-Tropsch synthesis wastewater was calculated. The result is as figure 1 shown.

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Abstract

The invention discloses a method for pre-treating Fischer-Tropsch synthesis wastewater through catalytic ozone oxidation. The method comprises: 1, taking Fischer-Tropsch synthesis wastewater, and placing into a reaction device; 2, weighing a powdery MnO2 catalyst or supported MnO2 catalyst, placing into the reaction device, and introducing ozone into the reaction device through an ozone generator;3, sampling, and filtering the sample through a needle filter to obtain a treated sample; and 4, determining the COD concentration of the treated sample obtained in the step 3 by using a potassium dichromate titration method, and calculating the COD removal efficiency of the Fischer-Tropsch synthesis wastewater. According to the present invention, with the method, the Fischer-Tropsch synthesis wastewater is pre-treated through the MnO2 catalytic ozone oxidation technology, such that the COD degradation efficiency is high, the effect is good, and the subsequent deep treatment is easily achieved so as to obtain the standard effluent.

Description

technical field [0001] The invention belongs to the technical field of catalytic ozonation, and in particular relates to a method for pretreating Fischer-Tropsch synthesis wastewater by catalytic ozonation. Background technique [0002] Ozone oxidation has a high oxidation-reduction potential, and its environmental friendliness and potential application have attracted more and more attention. Ozone decomposition produces extremely strong oxidizing hydroxyl radicals, which react with organic substances such as substitution, addition, electron transfer, and bond breaking. When oxidizing organic pollutants, there is no selectivity and no secondary pollution. It can decompose macromolecules. Degrade organic pollutants and reduce them into low-toxic or non-toxic small molecular substances, improving the biodegradability of wastewater. Catalytic ozonation technology is a new oxidation technology, through the catalyst to enhance the decomposition of ozone and the generation of hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/78
CPCC02F1/725C02F1/78
Inventor 贾青竹陈彦新任慧宇张鸿敏
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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