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Method for removing VOCs by UV light catalytic oxidation cooperating with biofiltration

A catalytic oxidation and biological filtration technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of slow degradation of refractory organic matter, and achieve efficient and rapid degradation, promote permeability, and high specific surface area Effect

Active Publication Date: 2012-04-25
广州狮岭皮革皮具产业研究中心有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the biological method is limited in practical application due to the slow degradation rate of microorganisms on refractory organic matter. For example, it takes 28 days for the standard activated sludge method to completely mineralize 50% of the phthalate pollutants PAEs. Become the focus of current research on biological methods

Method used

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  • Method for removing VOCs by UV light catalytic oxidation cooperating with biofiltration
  • Method for removing VOCs by UV light catalytic oxidation cooperating with biofiltration
  • Method for removing VOCs by UV light catalytic oxidation cooperating with biofiltration

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Experimental program
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Effect test

Embodiment 1

[0033] VOCs use o-dichlorobenzene with a higher boiling point; after the successful and stable operation of the biofiltration tower, the organic gas is passed into the spray tower at a flow rate of 1.5m 3 / min, the initial concentration of o-dichlorobenzene is 500mg / m 3 , after being pretreated by the spray tower, it enters the photocatalyst and stays for 60s, and the photocatalyst contains 10.0g nanometer Na 2 Ti 6 o 13 / TiO 2 Catalyst, irradiated with a 30W ultraviolet lamp, the partially oxidized organic waste gas after photocatalysis enters the biological filter tower, and the volume of the packing in the tower is 1m 3 , discharge after staying for 30s, the reflux flow rate of the nutrient solution is 3.5L / h, and the outlet concentration of o-dichlorobenzene in the organic gas is 4.5mg / m 3 , VOCs removal rate is 99.1%.

Embodiment 2

[0035] VOCs use o-dichlorobenzene with a higher boiling point; after the successful and stable operation of the biofiltration tower, the organic gas is passed into the spray tower at a flow rate of 3.0m 3 / min, the initial concentration of o-dichlorobenzene is 500mg / m 3 , after being pretreated by the spray tower, it enters the photocatalyst and stays for 60s. The photocatalyst contains nano-Na 2 Ti 6 o 13 / TiO 2 Catalyst 20.0g, irradiated with a 60W ultraviolet lamp, the partially oxidized organic waste gas after photocatalysis enters the biological filter tower, and the volume of the filler in the tower is 2m 3 , stay for 60s, the reflux flow rate of the nutrient solution is 3.5L / h, and the outlet concentration of o-dichlorobenzene in the organic gas is 3.5mg / m 3 , The removal rate of VOCs is 99.3%.

Embodiment 3

[0037] VOCs use toluene with a higher boiling point; after the successful and stable operation of the biofiltration tower, the organic gas is passed into the spray tower at a flow rate of 1.5m 3 / min, the initial concentration of toluene is 500mg / m 3 , after being pretreated by the spray tower, it enters the photocatalyst and stays for 60s. The photocatalyst contains nano-Na 2 Ti 6 o 13 / TiO 2 Catalyst 10.0g, irradiated with a 30W ultraviolet lamp, the partially oxidized organic waste gas after photocatalysis enters the biological filter tower, and the volume of the filler in the tower is 1m 3 , stay for 180s, the reflux flow rate of the nutrient solution is 3.5L / h, and the outlet concentration of toluene in the organic gas is 2mg / m 3 , The removal rate of VOCs is 99.6%.

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Abstract

The invention, belonging to the technical field of air environmental pollution treatment, biofiltration and environmental pollution treatment, discloses a method for removing volatile organic chemicals (VOCs) by using nano Na2Ti6O13 / TiO2 UV light catalytic oxidation cooperating with biofiltration. The method comprises the following steps that: organic waste gases enter into a photocatalytic device through a spray tower for catalyzing, then the gases enter into a biofiltering tower for filtering from the bottom of the biofiltering tower, wherein, the organic waste gases enter into the photocatalytic device for catalytic reaction, and partial VOCs are subject to photocatalytic oxidation by a nano Na2Ti6O13 / TiO2 catalyst to form a water-soluble compound; in the biofiltering tower, the rest VOCs are degraded into CO2 and water and then discharged by specific biological bacterial species, and the biofiltering tower is communicated with a microbe activity regulation system to regulate the activity of the bacteria. The invention can efficiently decompose the VOCs in industrial waste gases, and can widely applied in treating the industrial gases containing VOCs.

Description

technical field [0001] The invention belongs to the technical field of atmospheric environmental pollution control, biological filtration and environmental pollution control, and specifically relates to a 2 Ti 6 o 13 / TiO 2 It is a method for removing VOCs by ultraviolet photocatalytic oxidation of catalysts and biological filtration. Background technique [0002] Volatile organic compounds (VOCs) are important pollutants that cause gray clouds over the Pearl River Delta, seriously affecting air quality, animal and plant growth, and human health, and pose a safety hazard. It mainly comes from the main pollutants in the exhaust gas of machinery industry, surface anticorrosion, antirust treatment, plastic product production, household appliances, insulating materials, artificial leather industry, petrochemical industry, pharmaceutical industry, printing industry, food packaging and other industries. According to reports, in 2007, the haze days in Guangdong Province reached...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/44
CPCY02A50/20
Inventor 焦利敏黄少斌周云云周南陈静周丽嫦简子聪刘杰
Owner 广州狮岭皮革皮具产业研究中心有限公司
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