Microbial flue gas desulfurizer

A desulfurizer and microorganism technology, applied in the field of microbial flue gas desulfurizer, can solve the problems of unsatisfactory, secondary pollution desulfurization rate, inability to implement industrialization promotion, etc. Effect

Inactive Publication Date: 2011-09-14
TIANJIN INST OF IND BIOTECH CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using pyrolusite to remove SO from flue gas 2 There have been relevant studies carried out as early as the 1990s, but it is still troubled by secondary pollution caused by the high by-product manganese dithionate and unsatisfactory desulfurization rate, and it is impossible to implement industrial promotion

Method used

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  • Microbial flue gas desulfurizer

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Effect test

preparation example Construction

[0019] 2. Preparation of desulfurizer

[0020] SO in existing pyrolusite 2 During the removal process, a high concentration of manganese ions (0.75% to 7.5%) will be produced. In order to enable the flora to perform its physiological functions normally in a high-concentration manganese ion environment, you can choose to adapt the flora to manganese ions. sexual domestication.

[0021] (1) The domesticated flora adapts to different concentrations of manganese ions:

[0022] Alicyclobacillus BM and acidophilic bacteria using reduced sulfur as an energy source were inoculated into Leatheren or 9K medium with a pH value of 4-5, respectively. Then culture at 30°C, 180rpm to OD 600 =0.5~0.6, then according to the ratio of Alicyclobacillus BM and acidophilic bacteria using reduced sulfur as the energy source, the ratio of 1:2 to 3 is mixed to make a mixed solution, and then the mixed solution is mixed with a ratio of 1:10 Add the ratio to the new Leatheren or 9K medium, and culti...

Embodiment 1

[0027] Alicyclobacillus BM and Thiobacillus thiooxidans were respectively cultured in leathern medium, and mixed according to the ratio of the number of bacteria to 1:3 to prepare 100L of desulfurizer, in which the concentration of viable bacteria was 1.5×10 9 CFU / ml. Add 10% pyrolusite powder in the desulfurizer, that is, 10 kg of pyrolusite powder (containing 15% manganese) is contained in 100L desulfurizer

Embodiment 2

[0029] After Alicyclobacillus BM, Thiobacillus thiooxidans and Thiobacillus ferrooxidans were cultured in 9K medium respectively, they were mixed according to the number of bacteria in a ratio of 1:2:2 to make a desulfurizer, and the concentration of viable bacteria was 2.9× 10 9 CFU / ml. Add 10 kg of pyrolusite (containing 15% manganese) into 100 L of desulfurizer.

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Abstract

The invention relates to a microbial flue gas desulfurizer, which is characterized by comprising bacterial solution of active bacteria of Alicyclobacillus BM No.CGMCC 4500 and active bacteria of any one or more acidophilic bacteria which get energy from ferrous ions and/or reduced sulfur and/or element sulfur. Compared with the conventional pure-pyrolusite desulfurizer, the desulfurizer provided by the invention can improve the SO2 oxidization rate due to the addition of microbes which can oxide the reduced sulfur and fermentation liquor containing rich iron ions, improves the yield of manganese(II) dithionate serving as a byproduct and thus improves removal rate.

Description

technical field [0001] The invention belongs to the technical field of flue gas desulfurization, and in particular relates to a microbial flue gas desulfurizer, that is, a desulfurizer mainly composed of iron-sulfur oxidizing microorganisms, which removes sulfur dioxide in flue gas. technical background [0002] SO in the atmosphere 2 It is the main factor for the formation of acid rain. The global agricultural, economic and cultural losses caused by acid rain are huge every year. At the same time, acid rain causes surface, groundwater, and soil acidification, causing damage to the environment. Among them, SO in the flue gas emitted by thermal power generation 2 is SO in the atmosphere 2 main source of . my country's coal resources are characterized by high sulfur content, SO in the flue gas produced after combustion 2 content is higher. Although the government has adopted a series of energy-saving and emission-reduction measures, SO 2 Combined emissions still exceed th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/85B01D53/50
CPCY02A50/20
Inventor 韩一凡郑承纲张小霞温丹黄志勇
Owner TIANJIN INST OF IND BIOTECH CHINESE ACADEMY OF SCI
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