A kind of porous polyurethane foam particle filler suitable for moving bed biofilm reactor and preparation method thereof

A moving bed biofilm, polyurethane foam technology, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve problems such as rare research on filler modification, and achieve good dispersion , Good uniformity and strong rigidity

Active Publication Date: 2021-08-06
浙江工业大学上虞研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the above existing technologies that at present, multifunctional materials are mostly mixed with traditional fillers to improve the specific surface area and hydrophilicity of fillers, but there are few studies on the modification of fillers themselves.

Method used

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  • A kind of porous polyurethane foam particle filler suitable for moving bed biofilm reactor and preparation method thereof
  • A kind of porous polyurethane foam particle filler suitable for moving bed biofilm reactor and preparation method thereof
  • A kind of porous polyurethane foam particle filler suitable for moving bed biofilm reactor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Add cellulose microcrystals in 65% zinc chloride solution, and dissolve for 1 hour at 25°C with a stirring rate of 4000r / min, add carboxymethylcellulose sodium that accounts for 1wt% of the total amount of the system, and Process in an ultrasonic cell pulverizer with a power of 500W for 3s, with an interval of 5s, and a total working time of 15min. Continue to dissolve and filter to obtain nanocellulose sol.

[0028] (2) After mixing the nano-cellulose sol with a particle size of 800-1200nm and the silk protein solution with a molecular weight of 12-25kDa evenly, wherein the mass ratio of the nano-cellulose to the silk protein is 0.2:0.5, after freeze-drying, grind , forming ultrafine mixed powder of nanocellulose / regenerated silk fibroin with a particle size of 20-800 μm.

[0029] (3) In parts by weight, add 1-15 parts of nanocellulose / regenerated silk fibroin ultrafine mixed powder to 50 parts of polyether polyol, 10 parts of ethylene glycol, and 3 parts in a mass...

Embodiment 2

[0032] (1) Add cellulose microcrystals in 70% zinc chloride solution, dissolve 3h at 40°C with a stirring rate of 6000r / min, add carboxymethylcellulose sodium that accounts for 3wt% of the total system, and Process in an ultrasonic cell pulverizer with a power of 700W for 5s, with an interval of 8s, and a total working time of 20min. Continue to dissolve and filter to obtain nanocellulose sol.

[0033] (2) After mixing the nano-cellulose sol with a particle size of 800-1200nm and the silk protein solution with a molecular weight of 12-25kDa evenly, the mass ratio of the nano-cellulose to the silk protein is 3:2, after freeze-drying, grind , forming ultrafine mixed powder of nanocellulose / regenerated silk fibroin with a particle size of 20-800 μm.

[0034] (3) In parts by weight, add 15 parts of nanocellulose / regenerated silk fibroin ultrafine mixed powder into 70 parts of polyether polyol, 15 parts of ethylene glycol, 6 parts of amines with a mass ratio of 1:1 Add 75 parts of c...

Embodiment 3

[0037] (1) Add cellulose microcrystals in 65% zinc chloride solution, dissolve 3h at 40°C with a stirring rate of 4000r / min, add carboxymethylcellulose sodium that accounts for 1wt% of the total system, and Process in an ultrasonic cell pulverizer with a power of 700W for 3s, with an interval of 8s, and a total working time of 15min. Continue to dissolve and filter to obtain nanocellulose sol.

[0038] (2) After mixing the nano-cellulose sol with a particle size of 800-1200nm and the silk protein solution with a molecular weight of 12-25kDa evenly, the mass ratio of the nano-cellulose to the silk protein is 3:0.5, freeze-dried, and ground , forming ultrafine mixed powder of nanocellulose / regenerated silk fibroin with a particle size of 20-800 μm.

[0039] (3) In parts by weight, add 15 parts of nanocellulose / regenerated silk fibroin ultrafine mixed powder into 50 parts of polyether polyol, 15 parts of ethylene glycol, and 3 parts of amine with a mass ratio of 1:1 Add 60 parts...

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Abstract

The invention provides a porous polyurethane foam particle filler suitable for a moving bed biofilm reactor and a preparation method thereof. Ultrasonic cell pulverizer continues to dissolve and filter to obtain nanocellulose sol; after mixing nanocellulose sol and silk protein solution evenly, freeze-drying, and grinding to form nanocellulose / regenerated silk fibroin ultrafine mixed powder; nanofiber Add polyether polyol, ethylene glycol, amine catalyst triethylenediamine and tin catalyst dibutyltin dilaurate into the superfine mixed powder of fibroin / regenerated silk fibroin, stir evenly, add curing agent 4,4-diphenylmethane The diisocyanate is heat-preserved and vigorously stirred, poured into a spherical abrasive tool, sealed, aged at room temperature, and finally subjected to micro-etching treatment to prepare a porous polyurethane foam particle filler suitable for a moving bed biofilm reactor.

Description

technical field [0001] The invention belongs to the technical field of biofilm reactor materials, and in particular relates to a porous polyurethane foam particle filler suitable for moving bed biofilm reactors and a preparation method thereof. Background technique [0002] The moving bed biofilm reactor uses special plastic as the biofilm filler. The plastic filler is suspended in the reactor through aeration disturbance, liquid reflux or mechanical mixing. Microorganisms provide nutrients to make the sewage evolve. Therefore, the moving bed biofilm reactor has the advantages of both the activated sludge method and the biofilm method. It not only occupies a small area, but also has a high biomass in the reactor. Pollutants have good removal efficiency, the suspended carrier is in a state of continuous flow, no need to set up sludge return device or circular backwashing, it can automatically perform biofilm metabolism, stable operation, impact load resistance, no sludge bulk...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/00
CPCC02F3/00C02F3/104C02F3/108C02F3/2806C02F2003/001Y02W10/10
Inventor 叶青许萌罗书平王哲
Owner 浙江工业大学上虞研究院有限公司
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