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Combined packing for immobilized microorganism technology

A technology of immobilized microorganisms and combined fillers, applied in biological treatment devices, sustainable biological treatment, biological water/sewage treatment, etc., can solve problems such as deterioration of treatment effect, easy extrusion deformation, short flow of water treatment devices, etc.

Inactive Publication Date: 2019-07-05
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It is worth noting that although polyurethane fillers have excellent microbial immobilization capabilities, there are also problems such as easy clogging, easy extrusion deformation, short flow in water treatment devices, and deterioration of treatment effects.

Method used

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  • Combined packing for immobilized microorganism technology
  • Combined packing for immobilized microorganism technology
  • Combined packing for immobilized microorganism technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 A preparation method for a filler for a biological aerated filter A kind of filler for a biological aerated filter, comprising an outer frame and a porous polyurethane carrier, wherein the outer frame is a sphere formed by injection molding of a filler mold , the spherical surface is a meridian-like structure, and the gap size of the network structure is 0.5-1mm 2 , the two hemispheres are fixed by ring buckles, the diameter is 80mm-150mm, and the material is polyolefin, selected from polyethylene, polypropylene, polybutene, polybutadiene, polyisoprene or styrene. The porous polyurethane carrier is a regular hexahedron structure formed by foaming polyurethane foam, with a side length of 10-40mm. Schematic see figure 2 , wherein, 1 outer frame body, 2 porous polyurethane carrier;

[0026] The new type of polyurethane foam is made by fully stirring polyether polyol, N-methyldiethanolamine, catalyst tetramethylethylenediamine, foam stabilizer, methylene chlori...

Embodiment 2 comparative test example

[0032]By comparing with commercially available polyurethane fillers, the adsorption film formation performance and denitrification performance of the polyurethane fillers of the present invention are determined. Commercially available polyurethane filler 1 and commercially available polyurethane filler 2 were purchased, and together with the polyurethane filler of the present invention, they were sheared into cubes of about 1 cm. Take an equal amount of carrier and put it in a 250ml Erlenmeyer flask, add an equal amount of activated sludge and simulated water, put it in a shaker at 25°C and 150rpm for cultivation, change 10ml of the medium every day for film-hanging, and last for one month. After successful film-hanging, take out the carrier and divide the carrier evenly into two parts, one part is added with normal simulated wastewater containing 20mg / L ammonia nitrogen and 200mg / L COD; the other part is only added with nitration medium containing 20mg / L ammonia nitrogen , to...

Embodiment 3

[0034] Embodiment 3 Utilize the polyurethane combination filler of the present application to treat urban sewage A biological aerated filter (BAF) reactor device for a distributed rural sewage treatment purpose is composed of the polyurethane combination filler of the present invention, water inlet pump, backwash pump, blower, inlet It is composed of water flow meter, air flow meter and other equipment. Under the condition of hydraulic retention time of 4 hours, it can realize the surface IV discharge standard of effluent ammonia nitrogen and COD lower than 1.0mg / L and 30mg / L respectively. The start-up of the device is divided into three stages: (1) Inoculation stage: After the carrier is filled into the device, the activated sludge inoculation method is used to hang the film; (2) Suffocation stage: The BAF device is suffocated for 48 hours to make the advantages of the BAF Bacteria grow to the logarithmic phase, that is, the number reaches the maximum; (3) Continuous operation...

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Abstract

The invention provides a combined packing for an immobilized microorganism technology. The combined packing comprises an outer frame body and a porous polyurethane carrier, wherein the outer frame body is a sphere injection-molded by a packing mould; and the porous polyurethane carrier is of a regular hexahedron structure formed by foaming and cutting polyurethane foaming plastic. By using the packing provided by the invention, the starting time of a biochemical system can be remarkably shortened, and the treatment effect can be improved; and meanwhile, the combined packing is also relativelyhigh in porosity and mechanical strength, capable of providing relatively large attachment area for microorganisms, good in wear resistance in a long-term wastewater treatment process and free of loss.

Description

technical field [0001] The invention belongs to the field of microbial application, and in particular relates to a combined filler for immobilized microbial technology, which can be used in sewage treatment systems such as moving bed membrane bioreactors, biological contact oxygen tanks, and biological aerated filters, and can also be used in receiving In the bioremediation of polluted environmental water bodies, it is used as a carrier for microbial attachment and growth. Background technique [0002] Immobilized microorganism technology is a new and efficient water treatment technology developed in recent years. Filler is the core component of immobilized microorganism technology, it is the place where microorganisms inhabit and reproduce, and at the same time, it plays the role of intercepting suspended matter in the process of water treatment. There are various types of fillers, and their material composition and surface properties will directly affect the attachment, g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F3/28C02F3/34C08J9/42C08L75/08
CPCC02F3/12C02F3/2806C02F3/341C02F2203/004C08J9/42C08J2375/08C08J2479/08Y02A20/402Y02W10/10
Inventor 郑茂盛赵志荣王祥科
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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