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A method for treating hydrophobic organic waste gas by using silicone oil to strengthen biological method

An organic waste gas, hydrophobic technology, applied in chemical instruments and methods, separation methods, air quality improvement and other directions, can solve problems such as cumbersome operation, insoluble in water, mass transfer rate limitation, etc., to improve treatment efficiency, increase Scope of application, effect of a wide range of applications

Active Publication Date: 2015-11-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, due to the low concentration of organic waste gas, most of which are hydrophobic organic substances, large concentration fluctuations, generally toxic, and difficult to dissolve in water, the mass transfer rate between gas and liquid is affected by the biological treatment process. Restrictions hinder the treatment efficiency of biological methods and limit the ability of biological methods to treat organic waste gas, so some strengthening measures are needed to make up for these limitations
[0007] In the industry, many improvements are made from the perspective of the reactor, but there are often problems such as complex process structure, cumbersome operation, and increased energy consumption.

Method used

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  • A method for treating hydrophobic organic waste gas by using silicone oil to strengthen biological method
  • A method for treating hydrophobic organic waste gas by using silicone oil to strengthen biological method
  • A method for treating hydrophobic organic waste gas by using silicone oil to strengthen biological method

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Effect test

Embodiment 1

[0045] Experimental conditions: The simulated organic waste gas in the experiment is xylene waste gas, gas composition: xylene + air, obtained by bubbling with an air pump. The concentration of organic waste gas is controlled at 200-2000mg / m 3 between. The bioreactor in the experiment is an airlift bioreactor, such as figure 1 shown. The diameter of the outer cylinder of the reactor is 60mm, and the height is 630mm; the diameter of the guide cylinder is 30mm, and the height is 400mm. The volume of the whole reactor is 1.78L. The bacteria solution is composed of Pandoraea strains and nutrient solution. Inorganic salt nutrient solution (MineralSaltMedium, MSM) was obtained by diluting 10mL of LA solution and 20mL of B solution to 1L. Among them, liquid A contains 200g (NH4) 2 SO 4 ,10gMgCl 2 ·6H 2 O, 1gEDTA, 0.2gZnSO 4 ·7H 2 O,0.1gCaCl 2 2H 2 O,0.5gFeSO 4 ·7H 2 O,0.02gNa 2 MoO 4 2H 2 O,0.02gCuSO 4 ·5H 2 O,0.04gCoCl 2 ·6H 2 O and 0.1 gMnCl 2 2H 2 O, etc., ...

Embodiment 2

[0050] Experimental conditions: The simulated exhaust gas in the experiment is xylene exhaust gas, the gas composition: xylene + air, obtained by bubbling with an air pump. The concentration is controlled at 200~2000mg / m 3 between. The bioreactor in the experiment is an airlift reactor, such as figure 1 shown. The diameter of the outer cylinder is 60mm and the height is 630mm; the diameter of the guide cylinder is 30mm and the height is 400mm. The volume of the whole reactor is 1.78L. The bacteria solution is composed of Pandoraea strains and nutrient solution. Inorganic salt nutrient solution (MineralSaltMedium, MSM) was obtained by diluting 10mL of LA solution and 20mL of B solution to 1L. Among them, liquid A contains 200g (NH4) 2 SO 4 ,10gMgCl 2 ·6H 2 O, 1gEDTA, 0.2gZnSO 4 ·7H 2 O,0.1gCaCl 2 2H 2 O,0.5gFeSO 4 ·7H 2 O,0.02gNa 2 MoO 4 2H 2 O,0.02gCuSO 4 ·5H 2 O,0.04gCoCl 2 ·6H 2 O and 0.1 gMnCl 2 2H 2 O, etc., dilute to 1L after dissolving; B solution...

Embodiment 3

[0054] Experimental conditions: The simulated exhaust gas in the experiment is xylene exhaust gas, the gas composition: xylene + air, obtained by bubbling with an air pump. The concentration is controlled at 200~2000mg / m 3 between. The bioreactor in the experiment is an airlift reactor, such as figure 1 shown. The diameter of the outer cylinder is 60mm and the height is 630mm; the diameter of the guide cylinder is 30mm and the height is 400mm. The volume of the whole reactor is 1.78L. The bacteria solution is composed of Pandoraea strains and nutrient solution. In the two air-lift bioreactors that are stable under the same conditions, add the absorption liquid mixed with bacteria liquid and silicone oil to one of the reactors, and the amount of silicone oil added accounts for 5% (volume) of the total absorption liquid. Ratio), add a separate bacterial solution without silicone oil to another reactor. Inorganic salt nutrient solution (MineralSaltMedium, MSM) was obtained ...

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Abstract

The invention discloses a method for treating hydrophobic organic waste gas by utilizing a silicone oil reinforced biological method. The method comprises the following steps: (1) mixing strain fluid and silicone oil to obtain absorption liquid; (2) adding the absorption liquid into a bioreactor; and (3) introducing the hydrophobic organic waste gas into the bioreactor for treatment, wherein the hydrophobic organic waste gas is organic waste gas with solubility lower than 0.1g in 100g water at 25 DEG C. According to the method, the gas-liquid mass transfer efficiency can be well improved when the silicone oil is added into the absorption liquid, the degrading activity of microorganisms can be sufficiently played, and the treatment efficiency of organic waste gas can be greatly improved. Furthermore, the silicone oil has a certain storing capability to organic waste gas, the organic waste gas with higher air flow or concentration can be treated, and the application range of biologically treated organic waste gas can be expanded. Meanwhile, addition of the silicone oil has a certain promotion effect on the growth of the microorganisms, the stability of a reaction device can be improved, and the capability of the device for resisting temporary impact can be improved.

Description

technical field [0001] The invention relates to the biological treatment technology of organic waste gas, in particular to a method for treating hydrophobic organic waste gas by using silicone oil to strengthen the biological method. Background technique [0002] Volatile organic compounds (Volatile Organic Compounds, VOCs) are the main pollutants in petrochemical, paint decoration, printing industry, electronics manufacturing, surface anticorrosion, shoemaking, transportation and various chemical production processes. Volatile organic compounds refer to hydrocarbons and their derivatives with a saturated vapor pressure greater than 70Pa at normal temperature and a boiling point lower than 260°C at normal pressure, including hydrocarbons, aromatic hydrocarbons, alcohols, aldehydes, ketones, esters Classes, amines, organic acids, etc. The entry of VOCs into the environment will not only cause a great waste of resources, but also seriously pollute the environment, endangering...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/84
CPCY02A50/20
Inventor 李伟徐百龙王向前王俏丽
Owner ZHEJIANG UNIV
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