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A kind of magnetic biological carrier for biofilm reactor and preparation method thereof

A biofilm reactor, biological carrier technology, applied in chemical instruments and methods, immobilized on or in inorganic carriers, immobilized on/in organic carriers, etc. Problems such as poor water and biological affinity, and low number of microbes hanging on the film can achieve the effect of easy promotion and application, simple steps, and improved water treatment effect.

Active Publication Date: 2021-07-27
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used biofilm carriers are polystyrene, polyethylene, polyurethane, etc., artificially synthesized organic carriers, which have the advantages of light density, large specific surface area, easy control of shape, and low energy consumption for reactor start-up, but there are also some disadvantages. : Poor hydrophilicity and bio-affinity, low number of membrane-hanging microorganisms, and poor activity; the surface is too smooth, and the biofilm attached to the surface of the carrier is easy to slip off, etc.
These problems greatly affect the use efficiency of biofilm carriers and increase operating costs

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0027] A preparation method for a magnetic biocarrier for a biofilm reactor, comprising the steps of:

[0028] 1) adding styrene, coupling agent, magnetic substance and biological modifier to a three-necked flask equipped with a stirring device, a condenser tube and a constant pressure dropping funnel for pre-polymerization to obtain a mixed solution A;

[0029] 2) adding an initiator and a porogen to solution A through a constant pressure dropping funnel, adjusting the rotation speed of the stirring device, controlling the temperature of the water bath, and the reaction time to obtain a mixed solution B;

[0030] 3) Centrifuge and wash the mixed solution B, and pour it into a spherical mold;

[0031] 4) Put the mold above into a constant temperature drying oven at 55°C for 5-10 hours, dry and demould to obtain product C;

[0032] 5) Put the dried product C in a Soxhlet extractor, extract it with petroleum ether with a boiling range of 60-90°C, take it out after 8h, and dry i...

Embodiment 1

[0036] Formula: styrene 60g, initiator 0.8g, coupling agent 0.5g, magnetic substance 18g, porogen 30g, biological modifier 15g. Among them, 5g of starch and 10g of sodium carboxymethylcellulose in the biological modifier.

[0037] Preparation:

[0038] (1) Styrene, coupling agent, magnetic substance and biological modifier are added to a three-necked flask equipped with a stirring device, a condenser tube and a constant pressure dropping funnel for pre-polymerization to obtain a mixed solution A;

[0039] (2) Add initiator and porogen to solution A through a constant pressure dropping funnel, adjust the rotation speed of the stirring device, control the temperature of the water bath to 75° C., and the reaction time for 8 hours to obtain mixed solution B;

[0040] (3) Solution B is centrifuged at a speed of 8000rmp, washed 5 times with ethanol, and injected into the mold;

[0041] (4) Put the mold above into a constant temperature drying oven at 55°C for 8 hours, dry and demo...

Embodiment 2

[0045] Recipe: 60g of styrene, 1g of initiator, 0.5g of coupling agent, 15g of magnetic substance, 25g of porogen, and 12g of biological modifier. Among them, 4g of starch and 8g of sodium carboxymethylcellulose in the biological modifier.

[0046] Preparation:

[0047] (1) Styrene, coupling agent, magnetic substance and biological modifier are added to a three-necked flask equipped with a stirring device, a condenser tube and a constant pressure dropping funnel for pre-polymerization to obtain a mixed solution A;

[0048] (2) Add initiator and porogen to solution A through a constant pressure dropping funnel, adjust the rotation speed of the stirring device, control the temperature of the water bath to 70° C., and react for 9 hours to obtain mixed solution B;

[0049] (3) Solution B is centrifuged at a speed of 9000rmp, washed with ethanol 4 times, and injected into the mold;

[0050] (4) Put the mold above into a constant temperature drying oven at 55°C for 8 hours, dry an...

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PUM

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Abstract

The invention discloses a magnetic biological carrier for a biofilm reactor, which belongs to the technical field of biofilm water treatment, and is prepared from the following components in percentage by weight: styrene 50-60%, initiator 0.5%-1%, coupling 0.3%-0.6% agent, 5%-15% magnetic substance, 20%-30% porogen and 10%-15% biological modifier. The invention also discloses its preparation method. The present invention modifies the traditional polystyrene biocarrier by adding a biomodifier, improves its hydrophilicity and bio-affinity, increases its porosity and roughness by adding a porogen, and solves the problem of the traditional polystyrene carrier The smooth surface is not easy to bio-adhesion, the bio-affinity is poor, the amount of microbial adhesion is small, and the biological activity is not high. The water treatment effect has been significantly improved, and it has good economic benefits.

Description

technical field [0001] The invention belongs to the technical field of biofilm water treatment, and in particular relates to a magnetic biological carrier for a biofilm reactor and a preparation method thereof. Background technique [0002] Biofilm method is one of the main technologies for biological treatment of sewage, and it is a sewage biological treatment technology with a long history and continuous development. At the end of the nineteenth century, biological filters came out and began to be used for sewage treatment. In the 1960s, new organic synthetic materials with large specific surface area and porosity. Organic carriers such as polyethylene and polystyrene have gradually replaced traditional inorganic carriers such as gravel and slag, and biofilm methods have gained new development. In the 1970s, in addition to biological filters, biological turntables, submerged biological filters and biological fluidized bed technologies have been more researched and applie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N11/14C12N11/12C12N11/10C02F3/34
CPCC02F3/34C12N11/10C12N11/12C12N11/14
Inventor 祝建中苏雅李明陈靓张欢
Owner HOHAI UNIV