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Method for biofiltration processing of soot exhaust gas on basis of roofing greening nutritive soil

A technology of roof greening and biological filtration, which is applied in chemical instruments and methods, separation methods, air quality improvement, etc., can solve the problems of land occupation, unstable initial operation, single strain of bioreactor, etc. Market development prospects, the effect of high mass transfer efficiency

Inactive Publication Date: 2010-05-19
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the deficiencies in the existing waste gas treatment technology, such as single species of bioreactor bacteria, unstable initial operation, and special occupation of land, the present invention provides a method for treating oil fume waste gas based on roof greening nutrient soil biological filtration

Method used

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  • Method for biofiltration processing of soot exhaust gas on basis of roofing greening nutritive soil
  • Method for biofiltration processing of soot exhaust gas on basis of roofing greening nutritive soil
  • Method for biofiltration processing of soot exhaust gas on basis of roofing greening nutritive soil

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Embodiment 1

[0033] The embodiment and working principle of the present invention are as follows: oil fume exhaust gas containing VOC concentrations of 15.0mg / L, 20.0mg / L, 25.0mg / L, 30.0mg / L, 35.0mg / L and 40.0mg / L, based on the roof The biofiltration treatment experiment is carried out on the nutrient soil layer of the greening project. The main reactor of the treatment device is divided into a support layer, an air distribution partition layer, a nutrient soil layer and a turf layer. The nutrient soil layer is composed of various substances (cinder, loess, peat, and perlite are mixed in a volume ratio of 1:1:1:0.2, and the diameter of the mixed particles is 2-50mm). Exhaust gas enters from the bottom, disperses through the inverted air distribution plate to form tiny bubbles, and fully contacts with the biofilm on the nutrient soil layer. After completing the gas-liquid mass transfer process, the pollutants are decomposed into CO under the action of microbial oxidation and decomposition. ...

Embodiment 2

[0038] The embodiment and working principle of the present invention are as follows: other conditions are the same as in Example 1, and at a VOC concentration of 30.0 mg / L, see Table 2 for the effects of different residence times (EBRT) on the fume exhaust gas treatment results.

[0039] Table 2: Results of oil fume exhaust gas treatment at different residence times (EBRT)

[0040]

[0041]The results in Table 2 show that, when the residence time (EBRT) is 10s, 15s, 20s, 25s, 30s and 35s, the removal rate of VOC in oil fume by this process is 76.5%, 84.5%, 90.5%, 92.7%, 94.2% respectively and 96.3%.

Embodiment 3

[0043] The embodiment and working principle of the present invention are: other conditions are the same as in Example 1, the residence time (EBRT) is 20s, and the VOC concentration is 30.0mg / L.

[0044] Table 3: Results of oil fume exhaust gas treatment at different temperatures

[0045]

[0046]

[0047] The results in Table 3 show that at temperatures of 10°C, 15°C, 20°C, 25°C, 30°C, 35°C, 40°C, 45°C, and 50°C, the removal rates of oil fume by this process are 64.5%, 72.5%, and 80.5%, 88.4%, 92.5%, 93.6%, 70.3%, 62.6% and 52.1%.

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Abstract

The invention provides a method for biofiltration processing of soot exhaust gas on basis of roofing greening nutritive soil, comprising the following steps: taking roofing greening vegetation and the nutritive soil thereof as biological filler; arranging a supporting layer and a gas distribution device below the biological filler; spraying nutrient solution onto the biological filler; and when liquid phase pH is 6.0-7.5 and temperature is 20-35 DEG C, processing soot exhaust gas. The method of the invention has the advantages of large biomass, high mass transfer efficiency, small possibility of blocking, easy operation and control and the like; the invention expands the application of the roofing greening engineering, combines roofing greening with the processing of soot exhaust gas with a biological method and saves operation cost and floor space.

Description

(1) Technical field [0001] The invention relates to a method for treating oil fume waste gas based on roof greening nutrient soil biological filtration. (2) Background technology [0002] There are at least 300 kinds of organic waste in the fume exhaust gas, mainly fatty acids, alkanes, alkenes, aldehydes, ketones, alcohols, esters, aromatic compounds and heterocyclic compounds. The aldehyde compounds contained in the oil fume are very harmful to the human body, and often cause various symptoms of the eyes and respiratory mucosa. Higher concentrations of fumes are pulmonary toxic. There are also cytogenetic toxic substances in different biology such as gene mutation, DNA damage and chromosome damage in the fume exhaust gas, which are not only genotoxic, but also potentially carcinogenic. [0003] Foreign oil fume purification and separation technologies mainly include inertial separation, washing, adsorption, electrostatic deposition, thermal oxidation incineration, and ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/84
CPCY02A50/20
Inventor 於建明沙昊雷李伟东施炯
Owner ZHEJIANG UNIV OF TECH
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