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A kind of composite carrier material for biological fluidized bed and preparation method thereof

A biological fluidized bed and composite carrier technology, which is applied in the field of composite carrier materials for biological fluidized beds and its preparation, can solve the problems of weak binding strength, low adsorption performance, and poor pertinence of a single carrier, and is conducive to the growth of film growth , short film-hanging time and moderate density

Active Publication Date: 2022-03-04
JIANGSU TONGHUAN ENVIRONMENTAL PROTECTION EQUIP
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AI Technical Summary

Problems solved by technology

With the development of social science and technology and social progress, a single microbial immobilization carrier can no longer meet social needs. The composite carrier material is a combination of inorganic and organic carriers, which can improve the overall performance of immobilized microorganisms and obtain higher immobilization strength. It can also guarantee its microbial activity under certain circumstances, and improves the problem of weak binding force and low adsorption performance of a single carrier. When the carrier material is used in combination, it is easily affected by the volume of the fluidized bed, fluidization velocity, etc.

Method used

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  • A kind of composite carrier material for biological fluidized bed and preparation method thereof

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preparation example Construction

[0026] A preparation method for a composite carrier material for a biological fluidized bed, comprising the steps of:

[0027] 1) Weigh diatomaceous earth, put it in 1mol / L sodium hydroxide solution, soak it at 40°C for 1h, take it out, wash it with water until the surface is neutral, and then calcinate it at 450°C for 2h; after cooling to room temperature Add it into 1mol / L hydrochloric acid solution, soak it at 40°C for 1h, take it out, wash it with water until the surface becomes neutral, calcinate it at 450°C for 1h, wash it with water and dry it to obtain purified diatomite;

[0028] 2) Take purified diatomite and KH570 and add them to anhydrous toluene at a mass ratio of 1:2, ultrasonically disperse them evenly, heat and reflux for 4-5 hours, and centrifuge after natural cooling, collect the solids, wash with ethanol, dry, and grind , to obtain modified diatomite powder;

[0029] 3) Add equal volumes of ethanol and water into the reaction flask respectively, under the p...

Embodiment 2

[0033] 1) Weigh diatomaceous earth, put it in 1mol / L sodium hydroxide solution, soak it at 40°C for 1h, take it out, wash it with water until the surface is neutral, and then calcinate it at 450°C for 2h; after cooling to room temperature Add it into 1mol / L hydrochloric acid solution, soak it at 40°C for 1h, take it out, wash it with water until the surface becomes neutral, calcinate it at 450°C for 1h, wash it with water and dry it to obtain purified diatomite;

[0034] 2) Add purified diatomite and KH570 into 50ml of anhydrous toluene at a mass ratio of 1:2, disperse evenly with ultrasound, heat and reflux for 4-5h, and centrifuge after natural cooling, collect the solids, wash with ethanol, and dry. Grinding to obtain modified diatomite powder;

[0035]3) Add equal volumes of ethanol and water into the reaction flask respectively, under the protection of nitrogen, add the modified diatomite powder into the reaction flask, stir to make it evenly dispersed, and then continue ...

Embodiment 3

[0038] Same as Example 2, the difference is that KH570 is replaced by KH560.

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Abstract

This case involves a composite carrier material for a biological fluidized bed and its preparation method. Diatomite is first purified by alkali etching-calcination-acid etching-calcination; it is grafted and modified with a silane coupling agent; Polymerization reaction with acrylamide and polyethylene glycol methacrylate to obtain polymer graft modified diatomite powder; the obtained product is dispersed in ethanol and spray-dried with activated carbon to obtain a composite carrier material for a biological fluidized bed. The composite carrier material of the present invention exerts the characteristics of the material together as a whole, enhances the adhesion with microorganisms, facilitates the growth of microbial film formation, and has a short film formation time, which improves water treatment efficiency; it is less affected by the water environment, and the density is moderate and easy Fluidization: In addition to being a place for microorganisms to attach and grow, the carrier material itself also has certain adsorption and flocculation capabilities, which can effectively adsorb metal ions and organic pollutants in wastewater, and then make water treatment more thorough through microbial degradation.

Description

technical field [0001] The invention relates to a carrier material for water treatment, in particular to a composite carrier material for a biological fluidized bed and a preparation method thereof. Background technique [0002] Wastewater treatment usually includes adsorption method, flocculation sedimentation method, biodegradation method, etc., and good results have been achieved in past research. However, with the continuous development of society, treatment methods and treatment agents also need to be updated. At the beginning of the 19th century, biological contact oxidation ponds appeared, which used gravel, slag, etc. as biological fillers to treat domestic sewage. For the anaerobic filter, since the anaerobic section cannot be aerated and stirred, the density requirements of the carrier are very strict. If the carrier density is too high, it will cause suspension difficulties, and if it is too small, it is not conducive to the fluidization of the carrier; at the sa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/08C02F1/28C02F1/56C02F101/30
CPCC02F3/085C02F2101/30C02F1/281C02F1/283C02F1/56Y02W10/10
Inventor 杨瑞洪马裕华雍达明
Owner JIANGSU TONGHUAN ENVIRONMENTAL PROTECTION EQUIP
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