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Polyurethane/ceramic composite biological filler for sewage treatment and preparation method

A bio-filler and ceramic composite technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, ceramic products, etc., can solve problems such as poor hydrophilicity and insufficient mechanical strength of organic fillers, and achieve enhanced bio-affinity performance, realize the utilization of resources, and improve the effect of mechanical strength

Inactive Publication Date: 2021-01-15
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of poor hydrophilicity of common inorganic fillers and insufficient mechanical strength of organic fillers, the present invention proposes a polyurethane / ceramic composite biological filler for sewage treatment and its preparation method, using urban sludge to prepare porous ceramics, then compounding with water-based polyurethane, and foaming Preparation of polyurethane / ceramic bio-filler, the bio-filler prepared by the present invention has good bio-affinity, easy film formation, high strength, easy backwashing and other superior properties

Method used

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  • Polyurethane/ceramic composite biological filler for sewage treatment and preparation method

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Experimental program
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Effect test

Embodiment 1

[0030] (1) Mix the anionic chain extender dimethylolpropionic acid (DMPA), dicyclohexylmethane diisocyanate, and polyethylene glycol 600 with a mass ratio of 0.05:0.5:1, and set the polymerization reaction temperature at 55°C. Add a triethylenediamine liquid catalyst with a ratio of 0.7:1 to the anionic chain extender to react to prepare a polyurethane prepolymer;

[0031] (2) According to the mass ratio of triethylamine, lactide and polyurethane prepolymer of 0.65:0.19:10, take triethylamine and lactide, and add an appropriate amount of polyurethane prepolymer prepared in step (1) Acetone, the amount of acetone added is 8% of the mass of the polyurethane prepolymer, then the temperature is lowered to 20°C, triethylamine and lactide are added and stirring is continued to obtain water-based polyurethane;

[0032] (3) After deodorizing the municipal sludge, put it into a blast drying oven at a temperature of 108°C for drying, crush and sieve the dried municipal sludge to obtain ...

Embodiment 2

[0036] (1) Mix the anionic chain extender 1,4-butanediol-2-sulfonate sodium, diphenylmethane diisocyanate and polyethylene glycol 600 with a mass ratio of 0.04:1.5:1, and set the polymerization reaction temperature At 75°C, add a triethylenediamine liquid catalyst with a mass ratio of 0.9:1 to the anionic chain extender to react to prepare a polyurethane prepolymer;

[0037] (2) According to the mass ratio of triethylamine, lactide and polyurethane prepolymer of 0.45:0.19:10, take triethylamine and lactide, and add an appropriate amount of polyurethane prepolymer prepared in step (1) Acetone, the amount of acetone added is 5% of the mass of the polyurethane prepolymer, then the temperature is lowered to 25°C, and triethylamine and lactide are added to continue stirring and emulsification to obtain a water-based composite polyurethane;

[0038] (3) After deodorizing the municipal sludge, put it into a blast drying oven at a temperature of 105°C for drying, crush and sieve the d...

Embodiment 3

[0042] (1) Mix the anionic chain extender dimethylolbutyric acid (DMBA), dicyclohexylmethane diisocyanate, and polyethylene glycol 600 with a mass ratio of 0.05:2.5:1, and set the polymerization reaction temperature at 40°C. Add a triethylenediamine liquid catalyst with a mass ratio of 1.3:1 to the anionic chain extender to react to prepare a polyurethane prepolymer;

[0043] (2) According to the mass ratio of triethylamine, lactide and polyurethane prepolymer of 0.72:0.21:10, take triethylamine and lactide, and add an appropriate amount of polyurethane prepolymer prepared in step (1) acetone, the amount of acetone added is 10% of the mass of the polyurethane prepolymer, then cooled to 25°C, adding triethylamine and lactide to continue stirring and emulsification to obtain a water-based composite polyurethane;

[0044] (3) After deodorizing the municipal sludge, put it into a blast drying oven at a temperature of 110°C for drying, crush and sieve the dried municipal sludge to ...

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Abstract

The invention provides a polyurethane / ceramic composite biological filler for sewage treatment and a preparation method. The preparation method comprises the following steps: mixing an anionic chain extender, isocyanate and polyethylene glycol, adding a triethylene diamine liquid catalyst, and carrying out reaction to prepare a polyurethane prepolymer; adding a proper amount of acetone, performingcooling, adding triethylamine and lactide, and performing stirring to obtain waterborne polyurethane; pre-treating municipal sludge, mixing pre-treated municipal sludge with natural magnesium aluminum silicate and aluminum oxide, carrying out dry ball milling, and performing treating to obtain ceramic with abundant porous structures; and placing the porous ceramic in a mixed solution of sodium alginate and absolute ethyl alcohol to be mixed, and then adding waterborne polyurethane, wherein the biocompatibility of the material can be enhanced through the waterborne polyurethane and the sodiumalginate. Therefore, the polyurethane / ceramic composite material prepared by the method integrates the advantages of high mechanical strength, large specific surface area and high porosity of the porous ceramic, and has the advantages of good biocompatibility, easiness in biofilm formation, high strength, easiness in backwashing and the like when being used as a biological filler.

Description

technical field [0001] The invention relates to the field of sewage treatment materials, in particular to a polyurethane / ceramic composite biological filler for sewage treatment and a preparation method thereof. Background technique [0002] Water is an indispensable and irreplaceable precious material resource in human life and production activities. With the development of the economy and the increase of the population, the human demand for water resources continues to increase, coupled with the unreasonable exploitation and utilization of water resources, many countries and regions have experienced water shortages to varying degrees. With the increase in the use of water resources, the discharge of sewage is also increasing. The shortage of water resources and the pollution of water environment have become the bottleneck restricting the social and economic development of our country. [0003] In sewage treatment technology, biofilm method is a kind of aerobic biological...

Claims

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Application Information

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IPC IPC(8): C02F3/00C04B33/132C04B38/00C04B38/02C04B38/06
CPCC02F3/00C04B33/1321C04B38/0025C04B38/02C04B38/0645C04B2235/3217C04B2235/3427Y02P40/60
Inventor 陈庆曾军堂司文彬白涛
Owner CHENDU NEW KELI CHEM SCI CO LTD
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