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Preparation method of magnetic microbial carrier

A technology of magnetic microorganisms and carriers, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems that porous carriers cannot be effectively immobilized, microorganisms and carriers are difficult to form a diverse environment, etc. , to achieve the effect of promoting nitrification and denitrification, rich cell structure and large specific area

Active Publication Date: 2014-12-03
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 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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  • Preparation method of magnetic microbial carrier

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Effect test

preparation example Construction

[0053] 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:

[0054] 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;

[0055] 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;

[0056] 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.

[0057] The preparation method of the silicon-coated magnetic powder is as follows: disperse the f...

Embodiment 1

[0063] The synthesis of the carrier is through polycondensation reaction. The polycondensation steps are as follows: heat 20g of starch and 200g of PVA in a water bath to 90°C, stir and dissolve in 2000ml of distilled water. After the components are completely dissolved, add 80ml of sulfuric acid (4.7M) and composite strengthening components. The temperature of the water bath was lowered to 65°C and stabilized 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%-2.5%, and stir for 10 minutes. Pour the foaming solution into the forming mold, and react and form it in a blast drying oven at 65°C for 20 hours. The obtained carrier is properly cut (0.002×0.002m×m) to obtain the finished product, and the state of the surface of the magnetic microbial carrier under the electron microscope is as follows: figure 1 shown.

[0064] The preparation method of the silicon-coat...

Embodiment 2

[0066] Check the effect of sewage treatment:

[0067] 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.

[0068] The filter column effluent concentration of above-mentioned...

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Abstract

The invention provides a preparation method of a magnetic microbial carrier. The magnetic microbial carrier has a magnetic crosslinked-structure high-molecular polymer and silicon coating magnetic powder, wherein the high-molecular polymer is polyvinyl formal which is foamed and modified by a composite reinforcing component; and the composite reinforcing component is composed of at least one of activated carbon particle, kieselguhr, kaolin, fly ash and hydrophilic silicon dioxide. The preparation process is simple and easy to operate; and the prepared magnetic microbial carrier can solve the problems that the existing porous carrier can not effectively fix the microbes and a diversified environment can not be easily formed in the carrier.

Description

[0001] This application is a divisional application of "a magnetic microbial carrier and its preparation method". The filing date of the original application is July 8, 2013, and the application number is: 201310284367.6. 【Technical field】 [0002] The invention relates to a magnetic microbial carrier and a preparation method thereof. 【Background technique】 [0003] 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 biolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/30
Inventor 洪俊明李伟博
Owner HUAQIAO UNIVERSITY
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