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A biological fluidized bed filler for waste gas purification and preparation method thereof

A bio-fluidized bed and bio-catalysis technology, applied in the field of waste gas treatment containing VOCs, can solve the problems of increasing the weight of fillers and improving the difficulty of fluidization, and achieve the effects of high hydrophobicity, reducing the difficulty of fluidization, and tolerance to dry environments.

Active Publication Date: 2021-03-26
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The filler needs to be able to absorb enough water for the growth of microorganisms on the surface, which requires a good hydrophilicity on the surface of the filler, which leads to the increase in the weight of the filler itself and the difficulty of fluidization

Method used

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  • A biological fluidized bed filler for waste gas purification and preparation method thereof

Examples

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Effect test

Embodiment 1

[0039] This embodiment provides a filler for a biological fluidized bed for exhaust gas purification. The filler uses polystyrene with a particle size of 1-2 mm as the skeleton, and the surface of the polystyrene is uniformly coated with a load of 0.5-0.8 mm in thickness. Bran layer for pollutant-degrading bacteria and nutrients;

[0040] The wheat bran loaded with pollutant-degrading bacteria and nutrients in the wheat bran layer is prepared in the following manner:

[0041] 1), after grinding the wheat bran, pass through a 100-mesh sieve;

[0042] 2), inoculating the pollutant-degrading bacteria into the potato glucose nutrient solution according to the inoculum size of 2% to 3% of the nutrient solution volume, and then adding 2 to 3 g of sieved wheat bran according to 1 mL of the potato glucose nutrient solution, After fermenting for 48 hours at a temperature of 30°C, a mixed solution is obtained;

[0043] 3), after described mixed solution is naturally dried, grind, cros...

Embodiment 2

[0045]This embodiment provides a filler for a biological fluidized bed for exhaust gas purification. The filler uses polystyrene with a particle size of 1-2 mm as the skeleton, and the surface of the polystyrene is uniformly coated with a load of 0.5-0.8 mm in thickness. Sawdust layer of pollutant-degrading bacteria and nutrients;

[0046] The sawdust loaded with pollutant-degrading bacteria and nutrients in the sawdust layer is obtained in the following manner:

[0047] 1), after the sawdust is ground, pass through a 100-mesh sieve;

[0048] 2), inoculate the potato glucose nutrient solution with an inoculum size of 2% to 3% of the nutrient solution volume by the pollutant-degrading bacteria, then add 2 to 3 g of sieved sawdust to the 1 mL potato glucose nutrient solution, After fermenting for 48 hours at a temperature of 30°C, a mixed liquor is obtained;

[0049] 3), after said mixed solution is naturally dried, grind, cross 100 mesh sieves, obtain the sawdust of loading p...

Embodiment 3

[0051] This embodiment provides a filler for a biological fluidized bed for exhaust gas purification. The filler uses polystyrene with a particle size of 1-2 mm as the skeleton, and the surface of the polystyrene is uniformly coated with a load of 0.5-0.8 mm in thickness. Coir layer of pollutant-degrading bacteria and nutrients;

[0052] The coconut shell fiber loaded with pollutant degrading bacteria and nutrients in the coconut shell fiber layer is prepared in the following manner:

[0053] 1), after the coconut shell fiber is ground, pass through a 100-mesh sieve;

[0054] 2), inoculate the potato glucose nutrient solution with an inoculum size of 2% to 3% of the nutrient solution volume by the pollutant-degrading bacteria, and then add 2 to 3 g of sieved coconut shell fiber according to 1 mL of the potato glucose nutrient solution , at a temperature of 30°C, after fermentation for 48 hours, a mixed solution was obtained;

[0055] 3), after described mixed solution is dri...

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Abstract

The invention relates to a biological fluidized bed filler for exhaust gas purification and a preparation method thereof, wherein the filler has a framework made of a polymer lightweight material withparticle diameter of 0.5-5 mm, and the surface of the polymer lightweight material is at least partially coated with a solid biocatalytic reaction layer carrying pollutant degrading bacteria and nutrients with the thickness of 0.1-2 mm. The high-efficiency degrading bacteria can be firmly adhered to the reaction layer on the surface of the filler, and the volatile organic compounds (VOCs) and gaseous pollutants like odorous substances are utilized in degradation. The filler has the bulk density of 10-50 kg / m3, and can be fluidized when the superficial gas velocity is 0.1-0.2 m / s. In biological fluidized bed applications, the pressure drop is less than 2 Pa / cm, and the capability to remove gaseous pollutants is high. The filler is used in a biological fluidized bed, and has the outstandingadvantages of no inoculation, tolerance to dry environment, uniform distribution of microorganism growth and high mass transfer efficiency.

Description

technical field [0001] The invention belongs to the technical field of VOCs-containing waste gas treatment, in particular to a biological fluidized bed filler for waste gas purification and a preparation method thereof. Background technique [0002] In recent years, the problem of air pollution has become more and more serious. The massive emission of volatile organic compounds (Volatile Organic Compounds, VOCs) has caused regional atmospheric environmental problems such as urban haze and photochemical smog, seriously disturbing the daily life of residents, and threatening human health and ecological security. In 2016, Shanghai, Beijing, Guangdong and other provinces and cities have started to collect VOCs emission fees. In recent years, the monitoring of VOCs emissions has become increasingly standardized. Therefore, the research on effective treatment technology of industrial VOCs exhaust gas has become one of the hot spots of current scientific research. However, VOCs-c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/85B01D53/44
CPCB01D53/44B01D53/85B01D2251/95B01D2257/708Y02A50/20
Inventor 席劲瑛陆李超郑倩
Owner TSINGHUA UNIV