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Process for biological oxidation treatment of waste gas containing nitrogen oxide

A technology of nitric oxide and biological oxidation, which is applied in chemical instruments and methods, separation methods, air quality improvement, etc., can solve problems such as cost problems, and achieve the effects of small pressure drop of packing, simple operating conditions, economical and practical effects

Inactive Publication Date: 2007-10-24
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the cost problem of waste gas treatment catalysts in the prior art, the present invention provides a biological treatment method for waste gas containing nitric oxide that does not require a catalyst and has high removal efficiency

Method used

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  • Process for biological oxidation treatment of waste gas containing nitrogen oxide
  • Process for biological oxidation treatment of waste gas containing nitrogen oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] step:

[0027] (1) Add culture medium to activated sludge (5L), which contains (NH 4 ) 3 SO 4 (10g), FeSO 4 (1g), K 2 HPO 4 (5g), MgSO 4 (2.5g), NaCl (10g), CaCO 3 (5g), and add 133.93mg / m mixed in a mass ratio of 5:1 3 NaNO 2 -N and 2.67mg / m 3 K 2 HPO 4 - Nutrient solution mixture of P, NaNO 2 and K 2 HPO 4 They are respectively used as nitrogen source and phosphorus source, and then continuous aeration is carried out in the culture bottle at a temperature of 25°C, and oxygen is continuously introduced to domesticate and cultivate the nitrifying bacteria in the activated sludge.

[0028] (2) After about 20 days, the target product (NaNO 3 ) appears, continue to culture, add 5g of glucose, enrich culture.

[0029] (3) Film-hanging stage: Pour the bacterial solution obtained in step (2) into the inoculation basin, which is made of plexiglass, as shown in Figure 1, the bacterial solution is pressurized by the pump, and then sprinkled to the On the biofil...

Embodiment 2

[0033] step:

[0034] (1) Add medium to the extract mixture (5L) of soil and water around exhaust gas pollution, which contains (NH 4 ) 3 SO 4 (10g), FeSO 4 (1g), K 2 HPO 4 (5g), MgSO 4 (2.5g), NaCl (10g), CaCO 3 (5g), and add 133.93mg / m mixed in a mass ratio of 5:1 3 NaNO 2 -N and 2.67mg / m 3 K 2 HPO 4 - Nutrient solution mixture of P, NaNO 2 and K 2 HPO 4 They are respectively used as nitrogen source and phosphorus source, and then continuous aeration is carried out in the culture bottle at a temperature of 25°C, and oxygen is continuously introduced to domesticate and cultivate the nitrifying bacteria in the activated sludge.

[0035] (2) After about 15 days, the target product (NaNO 3) appeared, continue to culture, add 5g of glucose, and enrich the culture.

[0036] (3) Film-hanging stage: Pour the domesticated bacterial solution into the inoculation basin, which is made of plexiglass, as shown in Figure 1. The filler is a porous carbonaceous material na...

Embodiment 3

[0040] step:

[0041] (1) In 5L medium containing (NH 4 ) 3 SO 4 (10g), FeSO 4 (1g), K 2 HPO 4 (5g), MgSO 4 (2.5g), NaCl (10g), CaCO 3 (5g), add 50mL of a mixture of nitrifying bacteria strains and activated sludge supernatant in a mass ratio of 1:1, and add 133.93mg / m3 mixed in a mass ratio of 5:1 3 NaNO 2 -N and 2.67mg / m 3 K 2 HPO 4 - Nutrient solution mixture of P, NaNO 2 and K 2 HPO 4 They are respectively used as nitrogen source and phosphorus source, and then continuous aeration is carried out in the culture bottle at a temperature of 25°C, and oxygen is continuously introduced to domesticate and cultivate the nitrifying bacteria in the activated sludge.

[0042] (2) After about 15 days, the target product (NaNO 3 ) appeared, continue to cultivate, add a certain amount of 5g of glucose, and enrich the culture.

[0043] (3) Film-hanging stage: Pour the bacterial solution obtained in step (2) into the inoculation basin, which is made of plexiglass, as sho...

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Abstract

A bio-oxidizing process for treating the waste gas containing NO includes such steps as culturing nitrifying bacteria for reproducing them, spraying the obtained bacterial liquid onto biologic filler, and making said waste gas flow through the filler with a bio-membrane to remove NO. Its advantage is high effect (70-90%).

Description

(1) Technical field [0001] The invention relates to a biological treatment method for waste gas, in particular to a biological treatment method for waste gas containing nitric oxide. (2) Background technology [0002] Nitrogen oxides (NOx) in the gas are colorless NO, reddish-brown NO 2 General term for gases and their mixtures. NOx is mainly harmful to the human body through the respiratory tract. NOx in the atmosphere of residential areas (converted into NO 2 ) The maximum allowable concentration once determined is 0.15mg / m 3 . [0003] NOx emissions are receiving more and more attention. Most of NOx is produced by the oxidation of nitrogen in fuel and air during high-temperature combustion. Generally, NO and NO 2 The proportions in NOx are 95% and 5%, respectively. Acid rain and photochemical smog are mainly caused by atmospheric pollutants such as sulfur oxides, NOx and volatile organic compounds, and the changes to soil and water ecosystems are irreversible. In r...

Claims

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Application Information

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IPC IPC(8): B01D53/84B01D53/56
CPCY02A50/20
Inventor 陈建孟王家德钟卫鸿马建峰陈浚朱润晔
Owner ZHEJIANG UNIV OF TECH
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