Bacterium strain of reducing trivalence ferric and application thereof

A technology of ferric iron and bacteria strains, applied in the direction of bacteria, microorganism-based methods, biochemical equipment and methods, etc., can solve the problems of high cost, easy catalyst failure, high investment and daily operation costs, etc.

Inactive Publication Date: 2006-06-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these two technologies still have obvious disadvantages: ① High investment and operation costs, NH 3 It is a toxic and corrosive gas. It is troublesome to store and transport. It has high requirements for pipeline equipment and is expensive. ② It is easy to cause NH 3 Secondary pollution
③Easy to leak, NH 3 It may also be related to the SO in the flue gas 2 reaction, forming corrosive NH 4 HSO 4 , ④NH 3 The reduction of N is not complete, and it is easy to produce toxic and strong greenhouse effect N 2 O, ⑤The catalyst is prone to failure, and the catalyst may also be blocked by powdery f

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] This kind of bacteria has the characteristics of taking ferric iron as the final electron acceptor. After activating the preserved bacteria, inoculate 120mg / L into a 50ml sealed Erlenmeyer flask containing medium, and add 12mmol / L Fe(III)EDTA And 1000mg / L of glucose, at a temperature of 40°C, a shaker speed of 140rpm, and an initial pH value of 6-8, after 13 hours, 70% of Fe(III)EDTA was reduced to Fe(II) EDTA, the treatment load is about 5.4mmol Fe(III)EDTA / (h·g bacteria), so that the Fe(II)EDTA solution can be effectively regenerated and recycled in the flue gas denitrification process.

Embodiment 2

[0021] This kind of bacteria has the characteristics of taking ferric iron as the final electron acceptor. After activating the preserved bacteria, inoculate 200mg / L into a 50ml sealed Erlenmeyer flask containing medium, and add 6mmol / L Fe(III)EDTA And 1000mg / L of glucose, under the condition that the temperature is 40°C, the rotating speed of the shaker is 140rpm, and the initial pH value is 6-8, after 5.5 hours, the reduction rate of Fe(III)EDTA is 73%, and the processing load is about It is 4.0mmol Fe(III)EDTA / (h·g bacteria), so that the Fe(II)EDTA solution can be effectively regenerated and recycled in the flue gas denitrification process.

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PUM

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Abstract

The invention discloses reducing ferric iron bacteria strain and its using. It belongs to klebsiella trevisan sp. It is baculiform, single, pairs or short chain arrangement, non spore, and capsule. Gram staining is negative. Concurrently character does not like oxygen. Ferric iron is the final electron acceptor. The invention regenerates Fe(II)EDTA solution by biology method. In NOx complexation absorption process, part of the Fe(II)EDTA is oxidized to Fe(III)EDTA. And the Fe(III)EDTA is reduced to Fe(II)EDTA to regenerate to realize the cyclic utilization of the complexation absorption process.

Description

technical field [0001] The present invention relates to a bacterial strain for reducing ferric iron and its application. Background technique [0002] With the rapid development of industrialization, a large amount of nitrogen oxides (NO X ) emission is one of the main causes of a series of serious air pollution problems such as acid rain and photochemical smog. NO x It mainly comes from fuel combustion process and various industrial production processes, of which more than 90% comes from fuel combustion. With the gradual increase of its emissions and the continuous improvement of people's requirements for environmental quality, many countries have formulated relatively strict NO x emission regulations. Due to the large amount of flue gas emissions and the NO in the flue gas x The main component NO (accounting for 95%) has very low solubility in water, which increases its processing difficulty. Some existing flue gas denitrification technologies have defects such as hi...

Claims

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Application Information

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IPC IPC(8): C12N1/20B01D53/84C12R1/22
CPCY02A50/20
Inventor 李伟施耀荆国华吴成志
Owner ZHEJIANG UNIV
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