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Magnetic microbial carrier and preparation method thereof

A technology of magnetic microorganisms and carriers, which is applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems that microorganisms and carriers are difficult to form a diverse environment, and porous carriers cannot be effectively fixed. , to achieve rich cell structure, promote nitrification and denitrification effect, and high biocompatibility

Active Publication Date: 2013-10-16
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is to provide a magnetic microbial carrier, which can solve the problems that the existing porous carrier cannot effectively immobilize microorganisms and that it is difficult to form a diverse environment in the carrier.

Method used

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  • Magnetic microbial carrier and preparation method thereof

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preparation example Construction

[0052] The present invention also relates to a method for preparing the above-mentioned magnetic microbial carrier, the steps of the preparation method are as follows:

[0053] Step 10, put starch and polyvinyl alcohol aqueous solution in a water bath at 90°C, mechanically stir until dissolved, then add ethylene glycol and sulfuric acid as an acid catalyst;

[0054] Step 20. Stir the above solution evenly at 55-75°C, slowly add formaldehyde, and add composite reinforcement components, and at the same time rapidly increase the stirring speed, control the reaction time for 20 minutes, then add silicon-coated magnetic powder, and stir for 10 minutes to form a foam solution;

[0055] Step 30: Pour the foam liquid into the mold and react at 55-75°C for about 18-22 hours to obtain the magnetic microbial carrier formed by polycondensation reaction of polyvinyl alcohol and formaldehyde.

[0056] The preparation method of the silicon-coated magnetic powder is as follows: disperse the f...

Embodiment 1

[0062] The synthesis of the carrier is through polycondensation reaction. The polycondensation steps are as follows: 20g starch and 200g PVA water bath are heated to 90°C, stirred and dissolved in 2000ml distilled water. After the components are completely dissolved, add 80ml of sulfuric acid (4.7M) and composite reinforcement components. Lower the temperature of the water bath to 65°C and stabilize for 10 minutes, stir and add 80ml of formaldehyde solution (40wt.%), and react at 65°C for 20 minutes, add silicon-coated magnetic powder with a mass fraction of 1.67% to 2.5%, and stir for 10 minutes. The foaming liquid is poured into the molding mold, and reacted and molded in a blast drying oven at 65°C for 20h. The obtained carrier is properly cut (0.002×0.002m×m) to obtain the finished product. The state of the surface of the magnetic microbial carrier under the electron microscope is as follows: figure 1 shown.

[0063] The preparation method of silicon-coated magnetic powd...

Embodiment 2

[0065] Check the effect of sewage treatment:

[0066] A filter column was designed to explore the effect of the carrier on the treatment of mariculture wastewater. The filter column has a bottom diameter of 2×10 -3 m polystyrene pipe, the filling height of the filter material is 0.228m, and the top has a super height of 0.1m, such as figure 2 shown. Simulated sewage components, COD Mn The concentration is 108-165mg·L -1 , TN concentration 13.9-14.8mg·L -1， NH 4 + -N concentration 4.7-5.1mg·L -1 , NO3 - -N concentration 9.3-9.5mg·L -1 , with a salinity of 35g·L -1 . The concentration in 20ml is 5167mg·L -1 The activated sludge is added to the filter column as a hanging film. Monitor the concentration of total nitrogen, ammonia nitrogen, nitrate nitrogen, and nitrite nitrogen in the effluent of the filter column, and analyze the pollutant removal effect under the influence of different carriers.

[0067] The filter column effluent concentration of above-mentioned ...

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Abstract

The invention provides a magnetic microbial carrier and a preparation method thereof. The magnetic microbial carrier is a macromoleclar polymer with a magnetic cross-linked structure, the macromoleclar polymer is polyvinyl formal, the polyvinyl formal is foamed and modified through a composite enhancing component and comprises silicon packaged magnetic powder, and the composite enhancing component is made of at least one of activated charcoal particles, siliceous marl, kaolinite, coal ash and hydrophilic silicon dioxide. According to the invention, the preparation process is simple, the operation is easy, and the prepared magnetic microbial carrier can solve the problems that a conventional porous carrier can not effectively fix microbes and diversified environments in carriers are hard to be formed.

Description

【Technical field】 [0001] The invention relates to a magnetic microbial carrier and a preparation method thereof. 【Background technique】 [0002] In the process of biofilm method and activated sludge-biofilm method, the carrier is used as the place for immobilizing microorganisms, which has a high degree of bioconcentration. Commonly used biological carriers include glass materials, zeolite, ceramsite, activated carbon, diatomaceous earth, various resins, plastics, fibers, etc. However, these carriers can only form biofilm on the surface of the carrier, the biomass is relatively small, the microbial environment is relatively single, and there are disadvantages such as insufficient strength, poor wear resistance, small specific surface area, and poor biological stability. [0003] The magnetic field effect can greatly improve the biodegradation efficiency of wastewater. The possible mechanism of magnetic field enhanced wastewater biological treatment is: under the action of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34
Inventor 洪俊明李伟博
Owner HUAQIAO UNIVERSITY
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