Ceramic flat membrane for perishable waste sewage treatment and preparation method thereof

A technology for sewage treatment and flat membrane, applied in the field of membrane materials, can solve the problems of low water flux, poor hydrophilicity, low anti-pollution performance, etc., and achieve good pore size uniformity, excellent mechanical strength, and steric hindrance. big effect

Active Publication Date: 2022-06-21
HANGZHOU NAXI ECOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing ceramic flat membranes have defects such as poor hydrophilicity, low water flux, and low anti-pollution performance.

Method used

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  • Ceramic flat membrane for perishable waste sewage treatment and preparation method thereof
  • Ceramic flat membrane for perishable waste sewage treatment and preparation method thereof
  • Ceramic flat membrane for perishable waste sewage treatment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Example 1: A ceramic flat membrane for perishable waste sewage treatment:

[0059] The present embodiment provides a ceramic flat membrane for perishable waste sewage treatment, which is prepared by the following method:

[0060] 1) Preparation of support body:

[0061] Disperse 10g of sodium polyacrylate into 200g of water, add 750g of alumina, ball mill at 150r / min for 30min to obtain a mixture, then add 40g of silica sol, 120g of aluminum dihydrogen phosphate sol, and 80g of starch, ultrasonically treat for 30min, and the ultrasonic frequency is 20kW , the power density is 0.3W / cm 2 , put the mixture in an airtight container for 24 hours, cold isostatic pressing at 100MPa, vacuum drying at 60°C, heating up to 850°C at a rate of 10°C / min and holding for 20 minutes, and then heating at a rate of 5°C / min to 1150°C and kept for 10min to obtain an alumina ceramic flat membrane support;

[0062] 2) Preparation of separation membrane layer:

[0063] Mix 80g calcite powd...

Embodiment 2

[0066] Example 2: Another ceramic flat membrane for perishable waste sewage treatment:

[0067] This embodiment provides another ceramic flat membrane for perishable waste sewage treatment, the preparation method of which is basically the same as that of embodiment 1, the difference is that in this embodiment, the specific steps of the process of preparing the separation membrane layer are:

[0068] Disperse 10g of sodium polyacrylate into 450g of water, add 120g of alumina powder, 80g of calcite, 20g of silica sol, 30g of aluminum dihydrogen phosphate sol, 30g of starch, ball mill at 500r / min for 4h to obtain the separation membrane slurry, and then the support The body was immersed in the separation membrane layer slurry for 1 min, dried at room temperature, and then heated to 1250 °C for 30 min at a rate of 8 °C / min to obtain a ceramic flat membrane with a separation membrane layer supported on the surface; Sexual calcite.

Embodiment 3

[0069] Example 3: Another ceramic flat membrane for perishable waste sewage treatment:

[0070] This embodiment provides another ceramic flat membrane for perishable waste sewage treatment, the preparation method of which is basically the same as that of embodiment 1, the difference is that in this embodiment, the specific steps of the process of preparing the separation membrane layer are:

[0071] Disperse 10g of sodium polyacrylate into 450g of water, add 120g of alumina powder, 20g of silica sol, 30g of aluminum dihydrogen phosphate sol, 30g of starch, ball mill at 500r / min for 4h to obtain the separation membrane layer slurry, and then immerse the support in The separation membrane layer was placed in the slurry for 1 min, dried at room temperature, and then heated to 1250 °C for 30 min at a rate of 8 °C / min to obtain a ceramic flat membrane with a separation membrane layer supported on the surface; that is, no ethylene oxide modified calcite was added.

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Abstract

The invention belongs to the technical field of inorganic membrane materials, and in particular relates to a ceramic flat membrane for perishable waste sewage treatment and a preparation method thereof. The invention provides a ceramic flat membrane for perishable waste sewage treatment, comprising an alumina ceramic flat membrane support body, a separation membrane layer and a polymer membrane layer coated on the outer surface of the ceramic flat membrane support body; Aluminum powder, binder, dispersant, and pore-forming agent; the separation membrane layer includes alumina powder, styrene oxide modified calcite powder, binder, dispersant, and pore-forming agent; the polymer membrane layer is perfluorinated Polyether carboxylic acid cross-linked dehydroabietic amine; the surface of ceramic flat membrane has good hydrophilicity, high water flux, high mechanical strength, good filtration performance, excellent anti-pollution performance and long service life.

Description

technical field [0001] The invention belongs to the technical field of membrane materials, and in particular relates to a ceramic flat membrane for perishable garbage sewage treatment and a preparation method thereof. Background technique [0002] In recent years, with the development of our society and the growth of population, the speed of urbanization has accelerated, and there have been scattered sources of domestic sewage such as new university towns, tourist resorts, residential quarters around the city, and expressway living service areas. The time-varying coefficient of water quality and quantity is relatively large, the concentration of pollutants is usually lower than that of urban sewage, and its biodegradability is better. At present, the technologies for the treatment of distributed domestic sewage mainly include biological treatment, constructed wetlands, membrane bioreactors, etc. [0003] Membrane Bioreactor (MBR) water treatment technology is a new type of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/02B01D71/76B01D67/00B01D69/02B01D69/06B01D69/10B01D61/00C02F1/44
CPCB01D71/025B01D71/76B01D69/06B01D69/02B01D69/10B01D67/0079B01D61/00C02F1/44B01D2325/36B01D2325/12
Inventor 徐坚麟付源艾亮建
Owner HANGZHOU NAXI ECOLOGICAL TECH CO LTD
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