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Purification for stink and organic waste gas

A technology for organic waste gas and odor, applied in chemical instruments and methods, separation methods, air quality improvement, etc., can solve the problems of limited removal load, poor impact resistance, easy blockage of fillers, etc., to ensure continuous normal operation and impact resistance. Enhances, enhances the effect of purification

Active Publication Date: 2007-10-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the fixed flora is a single thiobacterium, there are the following disadvantages: the purification process is carried out on the biological filler with a single flora, and when the malodorous exhaust gas contains other types of malodorous components other than sulfides such as phenols, For odorous exhaust gas such as benzene, good results cannot be achieved. In addition, the removal load is also limited. For odorous exhaust gas with a large air volume, the consumption of nutrients will be large, and the economy will be reduced.
This method cannot solve the problem that the packing is easy to clog and the pressure drop increases during long-term operation
JP494733 discloses a net peat filler shaping technology, adding one or several organic or inorganic additives to the peat, which better solves the problems of easy plugging and large pressure drop of the filler
However, if the filler is formed first and then the microorganisms are mounted, the mounting strength of the microbial film on the microbial filler is low, it is easy to fall off, the growth environment of the microorganism is unstable, and the impact resistance is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0042] Examples 1-3 The immobilized microbial filler used in the present invention and its preparation process.

Embodiment 1

[0044] With peat fiber as carrier, the preparation method of microbial filler is as follows:

[0045] The activated sludge taken from the biochemical aeration reaction tank of the sewage treatment plant was used to contain 0.4w% beef extract, 0.3w% peptone, 0.2w% NaCl, 0.1w% Na 2 S 2 o 3 and 0.1M phosphate buffer medium were aerated for 4 days at pH 7.0 and 25°C, and the residual sludge was centrifuged to obtain a bacterial solution rich in purified microorganisms, which was used to completely impregnate the peat fiber. Add 0.4w% yeast extract, 2w% NH 4 Cl, 0.1w% Na 2 S 2 o 3 and 0.001mol of Fe + and Mg + , 0.01w% vitamins and other ingredients, adjust the pH to 7.0, and cultivate it in an aerobic way (stirring operation) at 25°C for 6 days, so that the purified microorganisms in the bacterial solution can fully grow and attach to the peat fiber, and then the peat fiber Take it out, use 0.4w% beef extract, 0.3w% peptone and Na + 、K + The nutrient solution of 0.1M pho...

Embodiment 2

[0049] Microbial filler with activated carbon particles as the carrier. The preparation method of microbial filler is as follows:

[0050] The activated sludge that will be taken from the sewage treatment facility is used to contain 0.4w% beef extract, 0.2w% (NH 4 ) 2 SO 4 , 0.2w% NaCl, and 0.1M phosphate buffer medium were aerated at pH 7.0 and 25°C for 4 days, and the bacterial liquid rich in purified microorganisms obtained after centrifugation was used to completely decompose the activated carbon particles For immersion, continue to use the above medium and add 0.001mol of Fe + , Mg + and 0.01w% vitamins and other ingredients, the pH was adjusted to 7.0, and after aerobic culture at 20-30°C for 6 days, the activated carbon particles were taken out, and the activated carbon particles were used to contain 0.4w% beef extract, 0.01w% Na 2 S 2 o 3 and Na + 、K + The 0.1M phosphate buffer nutrient solution was used to perform circular washing of the above-mentioned activ...

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PUM

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Abstract

A process for treating the offensive smell in petrochemical sewage treating plant and cleaning the low-concentration waste organic gas features use of immobilized microbial membrane as filler and 1-3 stages of microbial treatment. It includes such steps as wet dusting for pre-treating, microbial treating and post-treating by absorbent.

Description

technical field [0001] The invention relates to a method for purifying waste gas containing malodorous substances, in particular to a method for purifying malodorous and organic waste gas with low concentration, complex components and no recovery value. Background technique [0002] During the refining of crude oil with high sulfur content and the processing of related products in petrochemical enterprises, relatively serious odor pollution often occurs. These odor-containing components are mainly sulfur-based odors such as hydrogen sulfide, mercaptan, and sulfide. Ammonia, organic amine, thiophene and other odor pollution. On the other hand, the discharge of various toxic and harmful exhaust gases is also seriously endangering people's health. Such as benzene, toluene, xylene, styrene and other aromatic hydrocarbons and other hydrocarbon pollution. [0003] Odor pollution is an unpleasant feeling caused by people's sense of smell, and even a sensory pollution that affects...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/85B01D53/72B01D53/52
CPCY02A50/20
Inventor 郭兵兵
Owner CHINA PETROLEUM & CHEM CORP
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