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Suspended biological filter bed for treating organic waste gas

A biological filter bed, organic waste gas technology, applied in air quality improvement, dispersed particle separation, chemical instruments and methods, etc. The effect of increasing the specific surface area and high space-time efficiency

Inactive Publication Date: 2015-04-15
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, traditional biological methods, such as biotrickling filter towers and biofilter microbial systems, have the problems of small mass transfer area, low space-time efficiency, easy clogging and large air resistance.

Method used

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  • Suspended biological filter bed for treating organic waste gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] refer to figure 1 As shown, a suspended biological filter bed for treating organic waste gas includes a vertically arranged container 1, and the bottom and top of the container 1 are respectively provided with a waste gas inlet 4 and a purified gas outlet 5, and the waste gas inlet is provided with an aeration Device 3, the bottom of the container 1 is provided with a mud discharge port 7, the side wall of the container 1 is provided with a nutrient solution dosing port 6, the inside of the container 1 is provided with a nutrient solution, the nutrient solution is provided with a suspended filler 2, and the suspended filler 2 Immersed in the nutrient solution, the microorganisms attach and grow on the suspended filler, and the deflector 8 is arranged in the suspended filler. In a preferred mode of the present invention, a porous resin layer is arranged on the surface of the suspended filler, the thickness of the porous resin layer is preferably 4 mm, and the filling rat...

Embodiment 2

[0021] The difference between this embodiment and embodiment 1 is that the thickness of the porous resin layer is 3 mm, and the filling rate is 70%.

[0022] The waste gas source used is toluene, the toluene gas concentration is 155.3ppm, the flow rate is 160 L / h, the empty bed residence time of the reactor is 200s, and the nutrient solution is updated every 24h by 1L. The large aeration rate of 300L / h continues to stir the packing layer for 3 minutes, the sludge discharge period is 15 days, and the normal operation is 11 days. The average removal rate of toluene is 97.8%.

Embodiment 3

[0024] The difference between this embodiment and embodiment 1 is that the thickness of the porous resin layer is 5mm, and the filling rate is 50%.

[0025] The exhaust gas source used is toluene, the toluene gas concentration is 277.7ppmv, the flow rate is 160L / h, the empty bed residence time of the filter bed is 200s, the nutrient solution is updated every 24h by 1L, and the suspended biological filter bed is running at 300L / h every 5d. The large aeration volume of h continuously stirred the packing layer for 3 minutes, and it operated normally for 11 days, and the average removal rate of toluene was 85.3%.

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Abstract

The invention discloses a suspended biological filter bed for treating organic waste gas, which comprises a container arranged vertically, wherein the bottom and the top of the container are respectively provided with a waste gas inlet and a purified gas outlet; a mud outlet is formed on the bottom of the container; a nutrient solution adding port is formed on the sidewall of the container; nutrient solution is filled inside the container; a plastic suspended filler layer is arranged in the nutrient solution; microorganisms are attached and grow on the suspended filler; and the suspended biological filter bed is convenient to use and good in the filtration effect.

Description

technical field [0001] The invention belongs to the field of environmental protection technology and equipment, and in particular relates to a device for purifying triphenyl waste gas by using biofilm. Background technique [0002] Chemical raw materials or solvents widely used in industries such as dyestuffs, pesticides, fragrance production, paint making, spray painting, pharmaceuticals, shoemaking, furniture manufacturing, etc. They will produce organic waste gas during the production process, polluting the environment, especially benzene, toluene, di Toluene, commonly known as "triphenyl" exhaust gas in the industry, their influence on the central nervous system, causing people to have strong nerve excitement or inhibition, such as restlessness, daze, lethargy, etc.; and the toxic effects of xylene are mainly divided into nephrotoxicity, embryo or reproductive toxicity and neurotoxicity. In recent years, triphenyl waste gas has posed a considerable environmental threat ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/85B01D53/72
CPCY02A50/20
Inventor 熊亚陈欣田双红王新宇
Owner SUN YAT SEN UNIV
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