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Device and method for treating organic waste gas by coupling ultraviolet light catalysis with microorganisms

A technology for microbial treatment and organic waste gas, applied in chemical instruments and methods, chemical/physical processes, separation methods, etc., can solve the difficulty of biological treatment of organic pollutants, the loss of advantages of advanced oxidation-biodegradation, and the difficulty in controlling intermediate products. and other problems, to achieve the effect of shortening the processing cycle, compact structure and simple operation

Active Publication Date: 2021-10-01
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Advanced oxidation pretreatment aims to improve the biodegradability, however, its reaction speed is very fast, it is very difficult to control the intermediate products to the biodegradable stage, and the excessive oxidation of pollutants makes it difficult for the biological treatment of organic pollutants to play a role, making advanced oxidation-biological Degradation loses its advantages and increases processing costs

Method used

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  • Device and method for treating organic waste gas by coupling ultraviolet light catalysis with microorganisms
  • Device and method for treating organic waste gas by coupling ultraviolet light catalysis with microorganisms
  • Device and method for treating organic waste gas by coupling ultraviolet light catalysis with microorganisms

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Effect test

Embodiment 1

[0033] like figure 1 , figure 2 As shown, a device for treating organic waste gas with ultraviolet photocatalytic coupling microorganisms of the present invention includes an ultraviolet photocatalytic coupling microbial reactor, a circulating liquid storage tank 17 and a circulation pump 18, and the ultraviolet photocatalytic coupling microbial reactor includes a housing 5. The housing 5 is made of plexiglass, the bottom of the housing 5 is provided with an air inlet 1 and a liquid outlet 15, and the top of the housing 5 is provided with an air outlet 8 and a liquid inlet 19. The upper part of the casing 5 is also provided with a spraying device 9, which communicates with the liquid inlet 19. The spraying device 9 in this embodiment is preferably cross-shaped, and the spraying is more uniform.

[0034]The inside of the housing 5 is provided with at least two filler layers sequentially from bottom to top, and the filler layers are loaded with highly efficient degrading bacte...

Embodiment 2

[0053] Utilize the treatment device of embodiment 1 to carry out chlorobenzene waste gas treatment, set only ultraviolet light irradiation as control group, experimental group is set to ultraviolet+Ag / WO 3 (UV Photocatalytic Oxidation), UV+Efficient Degrading Bacteria (Biodegradation), UV+Ag / WO 3 +Efficient degrading bacteria (UV photocatalytic oxidation-biological direct coupling).

[0054] The circulating fluid flow rate is 2.95×10 -5 m 3 / s, the column temperature is kept at 25°C, the empty bed residence time (EBRT) is controlled at 120s, and the initial concentration of chlorobenzene is 160mg / m 3 Under the condition of reaction 10h, the concentration of chlorobenzene in the control group basically did not change.

[0055] From 0 to 4 hours, the concentration of chlorobenzene in the experimental group loaded with biofilm almost did not decrease. After 4 hours of adaptation, the degradation effect of biofilm on chlorobenzene increased slowly.

[0056] UV+Ag / WO 3 The deg...

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PUM

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Abstract

The invention discloses a device and method for treating organic waste gas through ultraviolet light catalysis coupling microorganisms. The device comprises an ultraviolet light catalysis coupling microorganism reactor, a circulating liquid storage tank and a circulating pump, and at least two filler layers are sequentially arranged in the reactor from bottom to top; the filler layer is a sponge carrier loaded with an efficient degrading flora and an Ag / WO3 catalyst. According to the invention, on the basis of ultraviolet light catalytic oxidation enhanced biodegradation, organic gas can be synchronously treated in three modes of ultraviolet light catalytic oxidation, biodegradation and ultraviolet light catalytic oxidation-biodegradation direct coupling, the structure is simple and compact, and the operation is simple; the device can operate continuously and efficiently, is low in energy consumption and cost, and has high organic gas purification efficiency.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to a treatment of organic waste gas, in particular to a device and a treatment method for treating organic waste gas with ultraviolet photocatalysis coupled with microorganisms. Background technique [0002] Volatile organic compounds (Volatile Organic Compounds) are important precursors of atmospheric compound pollution such as urban haze, ozone pollution and photochemical smog. They are harmful to the ecological environment, have a wide range of sources, are difficult to degrade, are bioaccumulative and toxic, and are carcinogenic to the human body. effect. [0003] At present, the advanced oxidation process is commonly used to improve the biodegradability of organic gases, and then the biological method is used to further degrade the intermediate product by indirect coupling method. Advanced oxidation pretreatment aims to improve the biodegradability, however, its reaction ...

Claims

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Application Information

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IPC IPC(8): B01D53/00B01D53/85B01D53/86B01D53/44B01J31/34B01J35/04
CPCB01J31/34B01D53/007B01D53/85B01D53/8687B01D2255/104B01D2255/20776B01D2255/802B01D2257/708B01D2251/95B01D2259/804B01J35/56B01J35/39Y02A50/20
Inventor 王丽萍李丹黄少萌赵雅琴何士龙
Owner CHINA UNIV OF MINING & TECH
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