A kind of exclusive bacteria and its removal process for organic sulfur in high-sulfur coal mines

An organic sulfur removal technology is applied in the field of exclusive bacteria and its culture, and the removal process of organic sulfur in high-sulfur coal mines, which can solve the problems of low organic sulfur removal rate, insufficient bacterial stability, and single desulfurization mode. Achieve the effect of improving the comprehensive recovery level, expanding the scope of resource utilization, and expanding the amount of utilization

Active Publication Date: 2019-09-03
有研资源环境技术研究院(北京)有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, in terms of organic sulfur removal, there are still bottleneck technical problems such as single desulfurization mode, insufficient bacterial stability, and long cycle, resulting in low organic sulfur removal rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The coal ore used comes from a sulfur-containing coal mine in Inner Mongolia. The sulfur in the coal ore mainly exists in the form of pyrite, followed by organic sulfur, and the sulfur in the form of sulfate is less. The specific content is shown in Table 1.

[0036] Table 1 Sulfur content in coal mines

[0037] Total sulfur pyrite sulfur organic sulfur sulfate sulfur Content / wt% 3.35 2.21 0.82 0.32

[0038] condition:

[0039] Slurry concentration 5%, pH value 2.0-3.0, Retech TS-I bacterial inoculum 10%, Retech Organosulfur-I 10% inoculum, shaker speed 140r / min, temperature 30-40°C, leaching cycle 15d.

[0040] result:

[0041] Table 2 Test results

[0042] Total sulfur organic sulfur pyrite sulfur Removal rate / wt% 76.72 56.48 86.26

[0043] The test was carried out according to the above conditions, the pretreatment for 15 days, the total sulfur removal rate reached 76.72%, of which the organic sulfur remova...

Embodiment 2

[0045] The coal ore used comes from a sulfur-containing coal mine in Outer Mongolia. The sulfur in the coal ore mainly exists in the form of pyrite, followed by organic sulfur and sulfate. The specific content is shown in Table 3.

[0046] Table 3 Sulfur content in coal mines

[0047] Total sulfur pyrite sulfur organic sulfur sulfate sulfur Content / wt% 3.12 1.60 0.68 0.74

[0048] condition:

[0049] Slurry concentration 5%, pH value 2.0-3.0, Retech TS-I bacterial inoculum 10%, Retech Organosulfur-I 10% inoculum, shaker speed 140r / min, temperature 30-40°C, leaching cycle 15d.

[0050] result:

[0051] Table 4 test results

[0052] Total sulfur organic sulfur pyrite sulfur Removal rate / wt% 75.24 60.18 85.14

[0053] The test was carried out according to the above conditions, the pretreatment for 15 days, the total sulfur removal rate reached 75.24%, of which the organic sulfur removal rate was 60.18%, the sulfur remov...

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PUM

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Abstract

The invention discloses exclusive bacteria and a technology for removing organic sulfur in high sulfur coal mine through the exclusive bacteria. The exclusive bacteria have a class name of Bacillus subtilis Retech Organosulfur-I, are preserved in the China general microbiological culture collection center in the microbiology institute with the address of No. 3, Beichen West Road, Chaoyang District, Beijing, China on the collection date of May 28, 2015, and has a preservation number of CGMCC No. 10933. The bacillus can degrade the organic sulfur in the coal mine under acidic and aerobic conditions, and through combination of the bacillus and the high efficiency desulfurization mixed strain Retech TS-I, inorganic sulfur is removed and effective total sulfur removal of high sulfur coal mine is realized. Compared with the conventional physical and chemical methods, the technology has the advantages of mild conditions, low cost and no harmful gas emission, and has a wide application prospect in the field of coal mine desulfurization.

Description

technical field [0001] The invention relates to the technical field of biological hydrometallurgy, in particular to an exclusive bacterium and its cultivation, which is applied to the removal process of organic sulfur in high-sulfur coal mines. Background technique [0002] Coal is the main energy source in our country, and the sulfur dioxide released from coal combustion seriously pollutes the environment. The average sulfur content of coal in my country is about 1.61wt%, and the sulfur content spans a large range, from ultra-low sulfur coal with a sulfur content of 0.04wt% to high-sulfur coal with a sulfur content of 9.62wt%. The sulfur content in coal is closely related to the depositional environment when coal was formed. The average sulfur content in coal is 3.23% in Southwest China, 3.05% in Northwest China, 2.02% in Central South China, 1.65% in North China, and 2% in Shandong Province. above. The combustion process of coal mines emits a large amount of soot, SO 2 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/20C10L9/00C12R1/125
Inventor 武彪尚鹤莫晓兰温建康
Owner 有研资源环境技术研究院(北京)有限公司
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