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A method of strengthening biological treatment of volatile organic compounds

A technology of volatile organic compounds and biological methods, applied in chemical instruments and methods, separation methods, and separation of dispersed particles, etc., can solve the problem that the degradation effect of hydrophobic VOCs needs to be improved, and the removal efficiency of high-concentration hydrophobic organic pollutants is not ideal. To solve the problem of high investment cost, to achieve the effect of increasing capacity, improving efficiency and improving removal rate

Active Publication Date: 2021-07-16
江门市邑凯环保服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biological method is generally only suitable for the treatment of VOCs with good water solubility, and the removal efficiency of high-concentration hydrophobic organic pollutants is not ideal, and requires larger equipment and floor space, and the input cost is higher. Therefore, The degradation effect of biological methods on hydrophobic VOCs needs to be improved

Method used

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  • A method of strengthening biological treatment of volatile organic compounds
  • A method of strengthening biological treatment of volatile organic compounds
  • A method of strengthening biological treatment of volatile organic compounds

Examples

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Effect test

Embodiment 1

[0033] A method for strengthening biological treatment of volatile organic compounds, comprising the following steps:

[0034] (1) Mix the composite surfactant, undecanol and bacterial liquid in a mass ratio of 0.008:0.15:1 to obtain a composite absorption liquid, the pH of the composite absorption liquid is controlled to be 7, and the composite surfactant includes sophorolipids and seaweed Sugar tetralipid, and the mass ratio of sophorolipid and trehalose tetralipid is 2:1;

[0035]The bacteria liquid includes a nutrient solution and bacterial strains, and the bacterial strains include Rhodococcus erythrococcus CICC 23622, Achromobacter sp. The number ratio of bacteria CICC24046 is 2:1:1;

[0036] (2) After the composite absorption solution of step (1) is added in the bioreactor, the volatile organic waste gas is passed into the bioreactor for processing, the intake rate is 75L / h, and the residence time of the reactor is 60s. The temperature of the reactor was set at 25°C, ...

Embodiment 2

[0038] A method for strengthening biological treatment of volatile organic compounds, comprising the following steps:

[0039] (1) Mix the composite surfactant, undecanol and bacterial liquid in a mass ratio of 0.008:0.15:1 to obtain a composite absorption liquid, the pH of the composite absorption liquid is controlled to be 7, and the composite surfactant includes sophorolipids and seaweed Sugar tetralipid, and the mass ratio of sophorolipid and trehalose tetralipid is 3:1;

[0040] The bacteria liquid includes a nutrient solution and bacterial strains, and the bacterial strains include Rhodococcus erythrococcus CICC 23622, Achromobacter sp. The number ratio of bacteria CICC24046 is 2:1:1;

[0041] (2) After the composite absorption solution of step (1) is added in the bioreactor, the volatile organic waste gas is passed into the bioreactor for processing, the intake rate is 75L / h, and the residence time of the reactor is 60s. The temperature of the reactor was set at 25°C,...

Embodiment 3

[0043] A method for strengthening biological treatment of volatile organic compounds, comprising the following steps:

[0044] (1) Mix the composite surfactant, undecanol and bacterial liquid in a mass ratio of 0.008:0.15:1 to obtain a composite absorption liquid, the pH of the composite absorption liquid is controlled to be 7, and the composite surfactant includes sophorolipids and seaweed Sugar tetralipid, and the mass ratio of sophorolipid and trehalose tetralipid is 5:1;

[0045] The bacteria liquid includes a nutrient solution and bacterial strains, and the bacterial strains include Rhodococcus erythrococcus CICC 23622, Achromobacter sp. The number ratio of bacteria CICC24046 is 2:1:1;

[0046] (2) After the composite absorption solution of step (1) is added in the bioreactor, the volatile organic waste gas is passed into the bioreactor for processing, the intake rate is 75L / h, and the residence time of the reactor is 60s. The temperature of the reactor was set at 25°C,...

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Abstract

The invention discloses a method for strengthening biological treatment of volatile organic compounds. In the present invention, the complex of sophorolipid and trehalose tetralipid is screened, and the ratio of the two is optimized, which can effectively improve the compatibilization effect on organic matter, and synergistically improve the removal rate of bioreactors for hydrophobic waste gas cumene and ethylene, and It itself can be completely degraded by microorganisms, and has the effect of non-toxicity and no secondary pollution; adding undecyl alcohol to the bacterial liquid forms a two-liquid phase distribution system of non-aqueous phase and water phase, which can improve the transfer of organic waste gas from the gas phase to the diffusion to the The ability of the liquid phase, VOCs with poor water solubility can be dissolved in undecyl alcohol first, and then diffused into the water phase by mass transfer, improving the ability of microorganisms to capture organic matter as a carbon source, thereby improving the efficiency of biodegradation of hydrophobic VOCs.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to a method for strengthening biological treatment of volatile organic compounds. Background technique [0002] Volatile organic compounds (VOCs) refer to organic compounds with a pungent odor at normal temperature with a saturated vapor pressure greater than 70.91Pa and a boiling point at normal pressure between 50 and 260°C, mainly including hydrocarbons, oxygen hydrocarbons, halogenated hydrocarbons, nitrogen Hydrocarbons, sulfur hydrocarbons and low-boiling polycyclic aromatic hydrocarbons, etc. With the rapid development of the chemical industry, a large amount of organic waste gas is discharged into the atmosphere. Although the concentration of VOCs in the entire atmospheric system is low, there are various types and complex components, which pose a serious threat to human life and health. The harm to human beings cannot be ignored if the ecological system is dest...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/84B01D53/44
CPCB01D53/44B01D53/84B01D2251/95Y02A50/20
Inventor 周武李镇江
Owner 江门市邑凯环保服务有限公司
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