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Method for treating biological filler from waste hollow fiber ultrafiltration membrane or microfiltration membrane as matrix

A technology of biological fillers and ultrafiltration membranes, which is applied in the treatment of granular microbial carriers, biological water/sewage treatment, chemical instruments and methods, etc. Reduce environmental hazards and reduce the effect of production

Inactive Publication Date: 2018-07-31
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Biological filler is an industry with relatively low profits and a relatively short service life. However, a large amount of waste filler is produced in the process of preparation and use every year, which also causes great pollution to the environment.

Method used

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  • Method for treating biological filler from waste hollow fiber ultrafiltration membrane or microfiltration membrane as matrix
  • Method for treating biological filler from waste hollow fiber ultrafiltration membrane or microfiltration membrane as matrix
  • Method for treating biological filler from waste hollow fiber ultrafiltration membrane or microfiltration membrane as matrix

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The discarded hollow fiber membranes in this example come from the membrane bioreactor of the municipal sewage treatment plant, and its material is polyvinylidene fluoride. The hollow fiber membranes have been in operation for about three years. At this time, the flux of the hollow fiber membranes is very serious. Already lower than the flow rate involved in the membrane bioreactor, a thick layer of microbial or pollutant deposits has been deposited on the membrane surface.

[0038] Clean the discarded hollow fiber membrane under the action of 100 KHz ultrasound for 1 hour to remove the microorganisms that are relatively easy to fall off the surface, then dry the membrane in an oven at 80-90°C, and cut it into 15 cm long In the short section, hollow fiber membrane fillers were prepared by preparing traditional biological fillers. In order to test the effect of film formation, the traditional fillers and the prepared waste hollow fiber membrane fillers were placed in two ...

Embodiment 2

[0040] The discarded hollow fiber membranes in this example come from MBR membranes used in the treatment of printing and dyeing wastewater. The material of the membranes is polyvinylidene fluoride. After analysis, the main pollutants on the surface of the hollow fiber membranes are not only some microorganisms, but also many dyes. related organic matter, and there may be a small amount of toxic and harmful substances in printing and dyeing wastewater. First, use 1% sodium hypochlorite solution to clean the membrane module again. The cleaning and soaking time is 10 hours to remove the pollutants on the surface of the membrane, and then soak in water for 1 hour, and then the entire membrane material is sterilized by high temperature. The environment for disinfection is 121 ℃, and the time is 30 minutes. It mainly uses high temperature to digest some toxic and harmful substances. Then one end of the hollow fiber membrane filler is fixed, and the other end is spread out to form a...

Embodiment 3

[0042] The waste hollow fiber membranes in this example are taken from the membrane filaments in the waterworks, and the material is polyvinyl chloride, because the relative pollution degree of the membrane filaments is relatively low, but in order to further improve the membrane-hanging performance of the membrane filaments, the surface of the membrane filaments is hydrophilic modification. The specific process is as follows:

[0043] (1) Fully wet and soak the membrane filaments of the discarded hollow fiber membranes first, generally using tap water for 2-4 hours;

[0044] (2) Surface hydroxylation modification. Put the membrane filament in step (1) into 10% hydrogen peroxide solution for 20 minutes, then take it out and put it into 3% polyvinyl alcohol solution, so that the polyvinyl alcohol can fully cross-link on the membrane surface , and the reaction time is 10 min. Now the film surface has formed a macromolecular hydrophilic layer, and the contact angle of the film...

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Abstract

The invention relates to a method for treating a biological filler from a waste hollow fiber ultrafiltration membrane or a microfiltration membrane as a matrix, wherein a raw material of the biological filler adopts the waste hollow fiber ultrafiltration membrane or the microfiltration membrane, according to the source and the pollution situation of the raw material of the biological filler, different physical or chemical cleaning methods are adopted, and the surface roughness, the initial microbial amount or the hydrophilic property of the raw material of the biological filler can be controlled by a surface hydrophilization modification method or nano material in-situ polymerization modification method, so that the biological filler has a faster film-hanging speed compared with a conventional the biological filler; according to the source and the pollution situation of the raw material of the biological filler, a path of recycling of the waste hollow fiber membrane is realized, and hazard of waste polymers to the environment can be greatly reduced. Through use of the waste hollow fiber membrane for the preparation of the biological filler, the preparation cost of the filler can begreatly reduced, and the preparation cost of the filler is mainly due to the cost of the raw material of the biological filler and energy consumption during the preparation process.

Description

technical field [0001] The invention belongs to the field of sewage treatment, focuses on the recycling of resources, and in particular relates to a treatment method for biological fillers based on waste hollow fiber ultrafiltration membranes or microfiltration membranes. Background technique [0002] Membrane technology is known as the water treatment technology of the 21st century because of its high separation efficiency, small footprint and simple operation. Indeed, with the rapid development of the membrane industry in China, the membrane technology has become more and more mature and stable, the performance of the membrane has been continuously improved, and the price of the membrane has been continuously reduced, making the membrane separation technology with ultrafiltration and microfiltration membrane technology as the core or Membrane bioreactor technology has been widely used in the fields of oil extraction wastewater, municipal sewage treatment plants, and deep p...

Claims

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Application Information

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IPC IPC(8): C02F3/00
CPCC02F3/00C02F2003/001
Inventor 周雪飞于振江张亚雷褚华强蒋淑红张勇
Owner TONGJI UNIV
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