Device and method for purifying waste gas containing volatile organic compounds by applying dominant microorganism bacterial communities

A technology of volatile organic and dominant flora, applied in chemical instruments and methods, separation methods, air quality improvement, etc., can solve problems such as high investment and operating costs, difficult operation, secondary pollution, etc., and achieve thorough decomposition and selection. The effect of good performance and low operating cost

Active Publication Date: 2015-11-11
HUNAN AIRBLUER ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to different physical and chemical properties, purification methods include condensation, combustion, absorption, adsorption and catalytic conversion, etc. These methods are complex in technology, high in investment and operation costs, difficult to operate, and easily cause secondary pollution

Method used

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  • Device and method for purifying waste gas containing volatile organic compounds by applying dominant microorganism bacterial communities
  • Device and method for purifying waste gas containing volatile organic compounds by applying dominant microorganism bacterial communities

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Such as figure 1 , figure 2 As shown, the device of the present invention for purifying volatile organic waste gas by using microbial dominant flora includes a bacteria incubator 1, a gas biological purification tower 2, a bacterial liquid circulation pump 3, a waste gas induced draft fan 4, a purified gas induced draft fan 5 and Exhaust cylinder 6;

[0049] The interior of the gas biological purification tower 2 is sequentially provided with a mist eliminator 2-1, a bacterial liquid distributor 2-2, a first-level biological contact filler 2-3, and a first-level biological contact filler 2-3 from the top of the tower to the bottom of the tower. Primary support grid 2-4 for contact packing 2-3, bacteria liquid redistributor 2-5, secondary biological contact packing 2-6, secondary support grid for supporting secondary biological contact packing 2-6 2-7 and bacterial liquid circulation tank 2-8; the top of the gas biological purification tower 2 is provided with a gas o...

Embodiment 2

[0055] The method for purifying volatile organic waste gas by using microbial dominant flora, using the device described in Example 1, specifically comprises the following steps:

[0056] (1) Selection and isolation of dominant bacterial species

[0057] Sludge samples were collected from the sewer of a styrene workshop in a petrochemical company. The strains degrading volatile organic compounds (VOCs) obtained through laboratory separation and screening were Pseudomonas, Flavobactterum, and Bacillus (Bacillus), Arthrobacter and other four strains were dominant strains.

[0058] (2) Domestication of bacterial strains

[0059] Using solid medium for domestication and cultivation: ①Activate the strains; ②Prepare the acclimation solution of each bacterium according to the volume ratio of sewage: bacteria acclimatization solution (that is, take 10mL of sewage and put it into a conical flask, then put it into 90mL Bacterial culture solution, mixed into 100mL bacterial culture and...

Embodiment 3

[0070] Use the method and device of the present invention to treat waste gas containing volatile organic compounds (VOCs) discharged by a petrochemical enterprise. The waste gas mainly contains alcohol, ethanol, phenol, cresol, indole, fatty acid, acetaldehyde, ketone, carbon disulfide, ammonia , amines and sulfides.

[0071] Intake volume is 1200m 3 / h, the concentration of hydrogen sulfide is 160mg / m 3 , Ammonia 6mg / m 3 , VOCs mixed gas concentration 1200 (dimensionless), control PH6.5-7.5, dissolved oxygen DO≤0.3mg / L, temperature 25-28℃, hydrogen sulfide after treatment is 0.1mg / m 3 , ammonia 1.6mg / m 3 , VOCs mixed gas concentration 22 (dimensionless), good treatment effect.

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Abstract

The invention discloses a device and a method for purifying waste gas containing volatile organic compounds by applying dominant microorganism bacterial communities. The device comprises a bacteria cultivation box (1), a biological gas purifying tower (2), a bacteria liquid circulating pump (3), a waste gas induced draft fan (4), a purified gas induced draft fan (5), and a gas discharging barrel (6). The method comprises the following steps: (1), selecting and separating dominant bacteria; (2), taming the bacteria from the step (1); (3), preparing bacteria liquid; and (4), forming films on filler in the biological gas purifying tower, debugging and running. The device and the method have the advantages of high treatment efficiency, low investment and running cost and no secondary pollution, and are easy to operate and environmentally friendly.

Description

technical field [0001] The invention belongs to the field of air pollution prevention and control, in particular to a device and method for purifying waste gas containing volatile organic waste by using microbial dominant flora. Background technique [0002] The types of exhaust gases containing volatile organic compounds (VOCs) that cause air pollution include hydrocarbons: benzene, xylene, ethane, naphtha, cyclohexane, etc.; halogenated hydrocarbons: dichloroethylene, tetrachloroethylene, trichloroethane , dichloromethane, trichlorobenzene, chloroform, carbon tetrachloride, etc.; ketones: acetone, cyclohexanone, etc.; lipids: ethyl acetate, butyl acetate, methylcycloethane, etc.; ethers: Ethyl acetate, dioxane, furfural, methyl cellosolve, etc.; alcohols: methanol, ethanol, isopropanol, butanol, etc.; monomolecular objects for superposition: vinyl chloride, acrylic acid, acrylate, benzene Ethylene, vinyl acetate, etc. [0003] The main source of waste gas containing vola...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/84B01D53/44
CPCY02A50/20
Inventor 钟儒波游建军胡志鑫唐传祥
Owner HUNAN AIRBLUER ENVIRONMENTAL PROTECTION TECH
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