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Immobilized desulfurization strain and method for treating sulfur dioxide-containing gas

A technology of silica and bacterial strains, applied in the direction of fixing on or in inorganic carriers, fixing on/in organic carriers, chemical instruments and methods, etc., can solve secondary pollution, high energy consumption, waste water and Sludge disposal is difficult and other problems, to achieve the effect of high conversion efficiency, simple preparation and good stability

Inactive Publication Date: 2020-09-01
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The desulfurization process has been developed for a long time. At present, there are mainly two types of wet desulfurization and dry desulfurization. Both processes have their own advantages and disadvantages. The main problems can be roughly summarized as high energy consumption, difficult disposal of wastewater and sludge, and secondary pollution. And other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Preparation of immobilized carrier:

[0026] Using macroporous resin as a fixed template, silica particles are prepared by burning and hydrolyzing silicate, and SiO with a particle size of 0.3cm is screened. 2 as spare pellets. Preparation of standard chitosan acetic acid aqueous solution: Weigh 1g acetic acid and 1g chitosan, add distilled water to dissolve, then transfer to a 1000mL volumetric flask, and distill the volume to the mark with distilled water to obtain the required standard solution. Weigh 20g of the above silicon dioxide and dry it at 80°C for 2h, then put it into 800mL chitosan acetic acid aqueous solution, shake it at room temperature for 4h, filter out the solid, and dry it in vacuum. Put the above-mentioned dried solid into 0.1g / L glutaraldehyde aqueous solution and vibrate for 2h, then filter out the solid, rinse repeatedly, and vacuum-dry to obtain the chitosan / silicon dioxide composite material. Repeat the above steps to obtain a large amount ...

Embodiment 2

[0034] 1. Preparation of immobilized carrier:

[0035] Using macroporous resin as a fixed template, silica particles are prepared by burning and hydrolyzing silicate, and SiO with a particle size of 0.4cm is screened. 2 as spare pellets. Preparation of standard chitosan acetic acid aqueous solution: Weigh 1.5g acetic acid and 1.2g chitosan, add distilled water to dissolve, then transfer to a 1000mL volumetric flask, and dilute to the mark with distilled water to obtain the required standard solution. Weigh 35g of the above silicon dioxide and dry it at 80°C for 2.5h, then put it into 900mL chitosan acetic acid aqueous solution, shake at room temperature for 4.5h, filter out the solid, and dry in vacuum. Put the above-mentioned dried solid into 0.3g / L glutaraldehyde aqueous solution and shake for 2.5h, then filter out the solid, rinse repeatedly, and vacuum-dry to obtain the chitosan / silicon dioxide composite material, and repeat the above steps to obtain A large number of im...

Embodiment 3

[0043] 1. Preparation of immobilized carrier:

[0044] Using macroporous resin as a fixed template, silica particles are prepared by burning and hydrolyzing silicate, and SiO with a particle size of 0.5 cm is screened. 2 as spare pellets. Preparation of standard chitosan acetic acid aqueous solution: Weigh 2 g of acetic acid and 1.5 g of chitosan, add distilled water to dissolve, then transfer to a 1000 mL volumetric flask, and dilute to the mark with distilled water to obtain the required standard solution. Weigh 50g of the above silicon dioxide and dry at 80°C for 3h, then put it into 1000mL chitosan acetic acid aqueous solution, shake at room temperature for 5h, filter out the solid, and dry in vacuum. Put the above dried solid into 0.5g / L glutaraldehyde aqueous solution and vibrate for 3h, then filter out the solid, rinse repeatedly, and vacuum dry to obtain the chitosan / silicon dioxide composite material. Repeat the above steps to obtain a large amount of immobilized ca...

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PUM

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Abstract

The invention relates to an immobilized desulfurization strain and a method for treating sulfur dioxide-containing gas, mainly SO2 gas. The immobilized desulfurization strain is obtained by preparation of an immobilized carrier and immobilized culture of desulfurization microorganisms; and the treatment method comprises the following steps: absorbing sulfur-containing gas by alkali liquor to obtain a sulfur-rich solution, carrying out anaerobic reduction to obtain an S2-solution, putting the immobilized desulfurization strain into a biotrickling filter, carrying out trickling filtration by using the S2-solution, carrying out full contact reaction with the immobilized strain, oxidizing sulfur ions in the sulfur-containing gas to generate elemental sulfur, and recovering the elemental sulfur. Materials used in the method are easy to prepare, the operation process is clear, the purification effect is good, the sulfur pollution gas conversion efficiency is high, and the continuous treatment capacity is achieved.

Description

technical field [0001] The invention relates to the treatment of industrial waste gas, in particular to an immobilized desulfurization strain and a method for treating gas containing sulfur dioxide. Background technique [0002] During the extraction, refining and use of fossil energy, the sulfur-containing substances in it will be converted into SO 2 Emissions in other forms have a greater impact on the quality of the atmospheric environment and are considered to be the main cause of frequent smog weather. The desulfurization process has been developed for a long time. At present, there are mainly two types of wet desulfurization and dry desulfurization. Both processes have their own advantages and disadvantages. The main problems can be roughly summarized as high energy consumption, difficult disposal of wastewater and sludge, and secondary pollution. And other issues. [0003] With the increasingly stringent environmental protection regulations and the improvement of th...

Claims

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Application Information

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IPC IPC(8): C12N11/14C12N11/10B01D53/50B01D53/84B01D53/78C12R1/01
CPCC12N11/14C12N11/10B01D53/501B01D53/50B01D53/84B01D2251/95Y02A50/20
Inventor 胡永红刘鑫鑫徐强杨文革姚亮李海涛
Owner NANJING UNIV OF TECH
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