Ceramic flat sheet membrane for perishable garbage sewage treatment and preparation method thereof

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

Active Publication Date: 2021-08-03
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 sheet membrane for perishable garbage sewage treatment and preparation method thereof
  • Ceramic flat sheet membrane for perishable garbage sewage treatment and preparation method thereof
  • Ceramic flat sheet membrane for perishable garbage sewage treatment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Embodiment 1: A kind of ceramic flat membrane for perishable garbage sewage treatment:

[0059] This example provides a ceramic flat membrane for perishable garbage sewage treatment, which is prepared by the following method:

[0060] 1) Support body preparation:

[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, and ultrasonicate for 30min at an ultrasonic frequency of 20kW , the power density is 0.3W / cm 2 , put the mixture in a closed container to stale for 24 hours, cold isostatic pressing at 100MPa, vacuum drying at 60°C, heat up to 850°C at a rate of 10°C / min and hold for 20 minutes, and then heat up at a rate of 5°C / min to 1150°C and keep it warm for 10 minutes to obtain an alumina ceramic flat membrane support;

[0062] 2) Preparation of separation membrane layer:

[0063] 80g of calc...

Embodiment 2

[0066] Embodiment 2: another kind of ceramic flat membrane for perishable garbage sewage treatment:

[0067] This embodiment provides another kind of ceramic flat membrane for perishable waste sewage treatment. Its preparation method is basically the same as that of Embodiment 1, the difference is that in this embodiment, the specific steps in 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, and 30g of starch, and ball mill at 500r / min for 4 hours to obtain the separation membrane layer slurry, and then put the support Immerse the body in the separation membrane layer slurry for 1min, dry at room temperature, and then heat up to 1250°C at a rate of 8°C / min and sinter for 30min to obtain a ceramic flat membrane with a separation membrane layer on the surface; that is, use calcite instead of styrene ox...

Embodiment 3

[0069] Embodiment 3: another kind of ceramic flat membrane for perishable garbage sewage treatment:

[0070] This embodiment provides another kind of ceramic flat membrane for perishable waste sewage treatment. Its preparation method is basically the same as that of Embodiment 1, the difference is that in this embodiment, the specific steps in 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, and 30g of starch, and ball mill at 500r / min for 4h to obtain the separation membrane layer slurry, and then immerse the support in Put the separation membrane layer in the slurry for 1 min, dry at room temperature, and then heat up to 1250 °C at a rate of 8 °C / min and sinter for 30 min to obtain a ceramic flat membrane with a separation membrane layer on the surface; that is, no styrene oxide modified calcite is added.

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Abstract

The invention belongs to the technical field of inorganic membrane materials, and particularly relates to a ceramic flat sheet membrane for perishable garbage sewage treatment and a preparation method thereof. The invention provides the ceramic flat sheet membrane for perishable garbage sewage treatment. The ceramic flat sheet membrane comprises an aluminum oxide ceramic flat sheet membrane support body, a separation membrane layer and a polymer membrane layer, wherein the outer surface of the ceramic flat sheet membrane support body is coated with the separation membrane layer; the support body comprises aluminum oxide powder, a binding agent, a dispersing agent and a pore forming agent; the separation membrane layer comprises aluminum oxide powder, styrene oxide modified calcite powder, a binding agent, a dispersing agent and a pore forming agent; and the polymer film layer is perfluoropolyether carboxylic acid cross-linked dehydroabietylamine. The ceramic flat sheet membrane is good in surface hydrophilicity, high in water flux, high in mechanical strength, good in filtering performance, excellent in anti-pollution performance and long in 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 waste sewage treatment and a preparation method thereof. Background technique [0002] In recent years, with the development of our country's society and the growth of population, the speed of urbanization has accelerated, and there have been distributed domestic sewage water sources such as new university towns, tourist resorts, residential quarters around the city, and highway 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 treating distributed domestic sewage mainly include biological treatment, constructed wetlands, and membrane bioreactors. [0003] Membrane Bioreactor (MBR) water treatment technology is a new water treatmen...

Claims

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Application Information

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Patent Type & Authority Applications(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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