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Microbial filler and production thereof

A technology of microorganisms and microbial membranes, applied in the direction of sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problems of easy plugging, poor impact resistance, and easy shedding of fillers, etc., to ensure continuous normal operation, Effects of enhanced impact resistance and enhanced structural strength

Active Publication Date: 2006-03-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

[0021] The biochemical aeration reaction tank of the sewage treatment plant often emits waste gas containing hydrogen sulfide, benzene, and volatile hydrocarbons. The microbial purification process can be used to purify the exhaust gas.

[0022] The microbial purification process device is filled with microbial fillers using peat fibers as carriers. The preparation method of microbial fillers is as follows:

[0023] 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...

Embodiment 2

[0027] The microbial purification process is used to treat the exhaust gas containing hydrogen sulfide and organic sulfide odor. The purification device is filled with activated carbon particles as the carrier of microbial fillers. The preparation method of microbial filler is as follows:

[0028] 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% bee...

Embodiment 3

[0032] According to the preparation process described in Example 1, the peat was replaced by a mixed carrier material with a volume ratio of peat and activated carbon of 3:1. The processes of dipping in the microbial bacterial liquid and spraying the nutrient solution are the same as those in the examples. The cross-linking agent uses the mixture of chitosan and calcium hydroxide (weight ratio 2: 1), adds 0.05 grams of cross-linking agent per gram of dry filler, mixes evenly, and mixes the water twice the volume of the loading body evenly, at 50 ℃ for The microbial film is cross-linked and solidified for 30 hours, and the excess water is drained. After forming, it can be stabilized at 70°C for 2 days.

[0033] The performance parameters of the immobilized microbial filler prepared by the above process are shown in the following table:

[0034] intensity

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PUM

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Abstract

Fixed microbial filler and its production are disclosed. The process is carried out by taking animals, plant, carbon, textile and particle or fiber of engineering plastic as skeleton of filler, immersing bacterial liquid from cultured active sludge, washing, curing, sizing and obtaining fixed microbial filler with purified microbial membrane. The filler is particle or fibrous mixture and consists of peat, active carbon, mixture of various plants stems or leaves, hollow plastics and mixture of above various substances.

Description

technical field [0001] The invention relates to a microbial filler and a preparation method thereof, in particular to an immobilized microbial filler body and a preparation method thereof. Background technique [0002] Various industrial wastewater and domestic sewage treatment facilities (hereinafter referred to as water treatment facilities), in the production process, often produce some toxic and harmful substances, especially odorous substances, such as: sulfide (hydrogen sulfide, low molecular mercaptan, sulfide, Dimethyl disulfide, etc.), volatile organic compounds (benzene series, phenolic compounds, etc.), ammonia, low molecular weight organic amines, etc. These toxic and harmful substances are discharged along with the exhaust of water treatment facilities (hereinafter referred to as waste gas), polluting the surrounding area and producing environmental pollution such as stench. [0003] As we all know, the use of microbial purification technology (such as CN 97121...

Claims

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Application Information

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IPC IPC(8): C02F3/10
CPCY02W10/10
Inventor 郭兵兵刘丽
Owner CHINA PETROLEUM & CHEM CORP
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