Biologic filtration method and device for purifying industrial organic waste gas

A technology of organic waste gas and biological filtration, applied in chemical instruments and methods, separation methods, air quality improvement and other directions, can solve the problems of affecting the biodegradation of functional microorganisms, cannot guarantee the treatment efficiency, and is not suitable for dealing with volatility, etc., and achieves stability. and efficient purification effect, improve stability and microbial diversity, avoid clogging effect

Inactive Publication Date: 2010-05-19

GUANGDONG INST OF MICROORGANISM

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AI-Extracted Technical Summary

Problems solved by technology

The filler used in the biological filter is an organic filler, which contains nutrients and does not need to be supplemented. Therefore, the management and daily maintenance of the equipment are convenient, but the filler has a short service life and needs to be replaced regularly.

Biotrickling filter packing has a long service life, but the packing is prone to clogging

Compared with the above two processes, the biggest advantage of the biological washing tank is that there is no problem of filler clogging, but it is not suitable for processing highly volatile substan...

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Abstract

The invention provides a biologic filtration method and a device for purifying industrial organic waste gas, which has high efficiency, less investment, low running cost and extensive application range of equipment. The method comprises the following steps: (1) the industrial organic waste gas is sprayed and processed in a spraying tower with a tap water spraying system to remove solid particles; (2) the waste gas enters a biologic trickling filtration tower filled with a biologic filler filled with a composite material for carrying out biologic filtration; inorganic salt nutrition liquid and active sludge which are stored in an aeration tank are evenly sprayed into the biologic trickling filtration tower by a pipeline and a spraying device, and the industrial organic waste gas is adsorbed, absorbed and degraded biologically by a biologic film attached to the surface of the biologic filler and the active sludge from the aeration tank; and (3) the industrial waste gas after being purified is discharged from a waste gas discharge port at the top of the biologic trickling filtration tower, and the active sludge is recirculated into the aeration tank for recycle after being regenerated. The invention has higher processing effect to various industrial mixed organic waste gases and wide application range, and the processed industrial mixed organic waste gases can reach the national emission standard or the emission standard of a manufacturer.

Application Domain

Dispersed particle separationAir quality improvement

Technology Topic

Spray towerIndustrial waste +10

Image

Examples

Experimental program(2)

Example Embodiment

[0064] Example 1: Treatment of waste gas from production workshops in the paint and coating industry

[0065] In this embodiment, the biological trickling filter tower C has a height of 2000 mm, a length of 1500 mm, and a width of 1500 mm, and the filling height of the filler is 1200 mm. Aeration tank volume is 0.5m 3. Treatment of industrial waste gas is 400m 3 /h, the residence time of the gas in the combined packing is 15 seconds. The biological filter device is filled with composite fillers and used for the treatment of waste gas in the paint production workshop after the degradation of bacterial strains and domestication. When the average concentration of TVOCs (total volatile organic compounds) in the waste gas is about 58ppm, it drops to 3.48ppm after treatment. The average removal rate is 94%.

Example Embodiment

[0066] Example 2: Treatment of common industrial waste gas

[0067] In this embodiment, after the bio-tricking filter tower C is filled with inorganic fillers, it is used to treat common industrial waste gas components such as toluene, xylene, styrene, acetone, methyl ethyl ketone, chloroform, etc. The biological trickling filter tower is 800mm high, with an inner diameter of 190mm, and filler The filling height is 340mm, and the aeration tank volume is 8L. The gas residence time in the empty bed of the combined packed bed is 30s. The treatment effect is shown in Table 1:

[0068] Table 1 Purification effect of biological filter device on different common industrial waste gas (mg/m 3 )

[0069]

[0070]

[0071] The above results show that the removal rate of common industrial waste gas is gradually increased by using the method and device of the present invention to treat industrial organic waste gas. After 5 days, the removal rate of easily degradable volatile organic waste gas by the biological treatment device is between 98% and 100%. The removal rate of refractory components such as styrene and chloroform has also reached more than 90%, and refractory gases require a longer acclimation period.

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Description & Claims & Application Information

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