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Ultraviolet-biological coordinate process for controlling hard-to-degrade organic gas

A combined process and organic gas technology, applied in the field of ultraviolet-biological combined process, can solve the problems of large footprint ultraviolet light oxidation technology, low processing efficiency of biological filtration technology, and production of toxic products, etc., to improve air environment quality, significantly Social and economic benefits, good stability

Inactive Publication Date: 2008-12-24
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcomings of traditional biological filtration technology, such as low treatment efficiency, large footprint, incomplete decomposition and toxic products produced by ultraviolet light oxidation technology, in the process of processing refractory organic gases, and to provide a method that can efficiently and safely remove A New Combined Process for Refractory Organic Gases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The ultraviolet pretreatment unit (cylindrical ultraviolet photooxidation reactor) with an effective volume of 2.3L and the biological filtration unit (biological filtration device) of 3.4L constitute a combined ultraviolet-biological filtration system to treat chlorobenzene gas, and the radiation inside the ultraviolet pretreatment unit The energy absorption rate is 38W·m -3 , the biomass of the biological filtration unit is 200kg / m 3 -filler. At gas flow rate 0.3m 3 / h, the empty tower residence time of the UV pretreatment unit and the biological filtration unit are 27s and 41s respectively, and the concentration of chlorobenzene at the inlet is 150mg-C / m 3 , under the condition of air relative humidity of 80%, the concentration of chlorobenzene in the outlet was not detected, and the removal rate was close to 100%. Under the same conditions, the outlet chlorobenzene concentration of a single biological filter unit is about 75mg-C / m 3 , the removal rate was 50%. ...

Embodiment 2

[0013] The ultraviolet pretreatment unit with an effective volume of 2.3L and the biological filtration unit of 3.4L constitute a combined ultraviolet-biological filtration system to treat chlorobenzene gas, and the radiation energy absorption rate inside the ultraviolet pretreatment unit is 38W·m -3 , the biomass of the biological filtration unit is 200kg / m 3 -filler. At gas flow rate 0.3m 3 / h (under this condition, the empty tower residence time of the ultraviolet pretreatment unit and the biological filtration unit are 27s and 41s respectively), and the concentration of chlorobenzene at the inlet is 580mg-C / m 3 , under the condition of air relative humidity of 80%, the outlet concentration of chlorobenzene is 170mg-C / m 3 , The removal rate reaches more than 70%. Under the same conditions, the outlet chlorobenzene concentration of a single biological filter device is about 400mg-C / m 3 , the removal rate is 30%.

Embodiment 3

[0015] The UV pretreatment unit with an effective volume of 2.3L and the biological filtration unit with a volume of 3.4L constitute a combined UV-biological filtration system to treat chlorobenzene gas. The average radiation intensity inside the UV pretreatment unit is 38W·m -3 , the biomass of the biological filtration unit is 200kg / m 3 -filler. At gas flow rate 0.3m 3 / h (under this condition, the empty tower residence time of the ultraviolet pretreatment unit and the biological filter unit are 27s and 41s respectively), and the concentration of chlorobenzene at the inlet is 960mg-C / m 3 , under the condition of air relative humidity of 80%, the outlet concentration of chlorobenzene is 570mg-C / m 3 , The removal rate reaches more than 40%. And under the same conditions, the outlet chlorobenzene concentration of a single biological filter device is about 760mg-C / m 3 , the removal rate was 20%.

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Abstract

The present invention discloses an ultraviolet-organism combinational process that belongs to the environmental governing technical field and controls the organic gas that is difficult to be degraded. The ultraviolet oxidation technology is adopted as the pre-treatment unit; the organism filtering technology is adopted as the main process to form an ultraviolet-organism combinational process. Compared with the single organism filtering technology and the single ultraviolet oxidation technology, the ultraviolet-organism combinational process overcomes the weaknesses that the traditional organism filtering technology has low treatment efficiency, and takes large land areas, etc. during processing the organic gas that is difficult to be degraded and has high concentration. At the same time, the combinational process can effectively overcome the weakness that the ultraviolet oxidation technology has incomplete decomposition and produces the toxic product, and reduces the hidden danger for the surrounding environment and the health of the human body.

Description

technical field [0001] The invention belongs to the technical field of environmental treatment, and in particular relates to an ultraviolet-biological combined process for controlling refractory organic gas with high concentration of volatile organic gas. Background technique [0002] Volatile organic compound pollution is one of the main reasons for the deterioration of people's living environment and air quality. Among them, the control technology for a class of refractory volatile organic compounds that are difficult to recycle has become the difficulty and focus of current research in this field. Among the traditional VOC pollution control technologies, biological filtration technology and ultraviolet photooxidation technology are two important control technologies. Biofiltration technology mainly removes volatile organic compounds through the biodegradation of microorganisms attached to the surface of the filler. However, when a single biofiltration technology is used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/84A62D3/176A62D3/02A62D101/20
CPCY02A50/20
Inventor 胡洪营席劲瑛王灿
Owner TSINGHUA UNIV
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