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Foaming polyvinyl formal microbial carrier and preparation method thereof

A polyvinyl formal, microbial carrier technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. Microorganisms, small specific surface area of ​​carriers, etc., to achieve the effect of promoting nitrification and denitrification, improving treatment efficiency, and simple production steps

Inactive Publication Date: 2014-01-22
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of the current porous carriers cannot effectively immobilize microorganisms due to their small specific surface area and poor bioaffinity, and cannot stably form diverse environments in the carrier.

Method used

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  • Foaming polyvinyl formal microbial carrier and preparation method thereof
  • Foaming polyvinyl formal microbial carrier and preparation method thereof
  • Foaming polyvinyl formal microbial carrier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0062] Step 10. Place 200g of polyvinyl alcohol aqueous solution in a 2000ml water bath at 90°C, stir mechanically until transparent, add 50ml of ethylene glycol, and add 80ml of 4.7mol / l sulfuric acid.

[0063] Step 20. Stir the above solution evenly at 65°C and 200rpm (10min), then slowly add 80ml of formaldehyde, at the same time rapidly increase the stirring speed to 540rpm, and control the reaction time to 20min.

[0064] Step 30, adding activated carbon particles with a mass fraction of 6.3% as a cell agent and a reinforcing agent, stirring at a speed of 270 rpm for 10 minutes to form a foam solution. The foam solution is poured into the mold and reacted at 65°C for about 20 hours to obtain the foamed polyvinyl formal microbial carrier product, and the foamed polyvinyl formal microbial carrier product is rinsed with clean water.

[0065] The obtained carrier is machined into shape as required to obtain the finished product.

[0066] Density of the foamed polyvinyl forma...

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Abstract

The invention provides a foaming polyvinyl formal microbial carrier and a preparation method thereof. The preparation method comprises the following steps of placing starch and a PVA (Polyvinyl Alcohol) water solution into a water bath at 90 DEG C, mechanically stirring till dissolution, and then adding glycol and 4-5 mol / L of sulfuric acid; step 20, uniformly stirring the solution at 60-80 DEG C, slowly adding formaldehyde, adding a carrier elasticity reinforcing agent, fast increasing the stirring speed to 450-700 rpm, and controlling reaction time to 20 minutes to form a foam solution; pouring the foam solution into a mould, and reacting under the condition of 60-80 DEG C for 18-22 hours to obtain the foaming polyvinyl formal microbial carrier. The foaming polyvinyl formal microbial carrier provided by the invention has the advantages of good elasticity, good hydrophilicity, large specific area, high porosity, high biological binding force and the like.

Description

【Technical field】 [0001] The invention relates to a foamed polyvinyl formal 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] In recent years, porous polymer carrier is a new type of carrier that has attracted much attention. It is mainly used for the growth of microbial membranes and increases the total amo...

Claims

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Application Information

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IPC IPC(8): C08F116/06C08F8/28C08K7/24C08K3/04C08K3/34C08K3/36C08J9/30C08L29/14C02F3/00
Inventor 洪俊明李伟博
Owner HUAQIAO UNIVERSITY
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