Preparation method and application of porous hydrophilic denitrification biological carrier

A biological carrier and hydrophilic technology, applied in the direction of sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve problems such as hindering popularization and application, large volume, and difficulty in applying a magnetic field, and achieve remarkable results. Effect of high self-acidification rate and increased oxygen concentration

Active Publication Date: 2011-09-07
ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large volume of the actual sewage biological treatment equipment, it is still difficult to apply a magnetic field, which hinders its popularization and application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0013] The preparation method of the porous hydrophilic denitrification biological carrier is: polyether polyol, polymer polyol, black slurry, dichloromethane , surfactant, amine catalyst, tin catalyst and water are added to the reaction kettle and stirred. The temperature in the reaction kettle is 23-27°C. After adding 52.5 parts by mass of activator, the second stirring is carried out. After the second stirring is uniform , adding 62.5 parts by mass of toluene diisocyanate, stirring for three times evenly, and then forming by reaction, putting the polyurethane foam formed by the reaction into a stripping tank for blasting and stripping to obtain a magnetic biological denitrification carrier.

[0014] The composition mass parts of the active agent are: 1:2-5:0-3:2-5 nano-iron, modified substance, powdered activated carbon, and the modified substance is modified bentonite or zeolite.

[0015] The porous hydrophilic denitrification biological carrier is used for the biochemical...

Embodiment 1

[0027] The mass parts are: 75:25:3:2:0.25:0.25:0.3:5 polyether polyol, polymer polyol, black pulp, methylene chloride, surfactant, amine catalyst, tin catalyst and water are added In the reaction kettle, stir, the temperature in the reaction kettle is 23°C, add mass parts: 52.5 active agent and then carry out the second stirring, after the second stirring is uniform, add mass parts: 62.5 toluene diisocyanate, stir three times evenly After reaction molding, put the reaction-molded polyurethane foam into a stripping tank for blasting stripping to obtain a magnetic biological denitrification carrier. Divide the bulky carrier into small porous net-like hydrophilic, magnetic, and catalytic oxidation denitrification biological carriers through a cutting machine as needed. The composition mass parts of the active agent are: 1:2-5:0-5 nano-iron, modified bentonite, powdered activated carbon.

[0028] The porous hydrophilic denitrification biological carrier is used for the biochemica...

Embodiment 2

[0030] The mass parts are: 75:25:3:2:0.25:0.25:0.3:5 polyether polyol, polymer polyol, black pulp, methylene chloride, surfactant, amine catalyst, tin catalyst and water are added In the reaction kettle, stir, the temperature in the reaction kettle is 27°C, add mass parts: 52.5 active agents and then perform secondary stirring. After the secondary stirring is uniform, add mass parts: 62.5 toluene diisocyanate, and stir three times evenly After reaction molding, put the reaction-molded polyurethane foam into a stripping tank for blasting stripping to obtain a magnetic biological denitrification carrier. Divide the bulky carrier into small porous networked hydrophilic and magnetic total nitrogen removal biological carriers through a cutting machine as needed. The composition mass parts of the active agent are: 1:2-3:2-5 nano-iron, zeolite, powdered activated carbon.

[0031] The porous hydrophilic denitrification biological carrier is used for the biochemical treatment of refra...

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PUM

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Abstract

The invention discloses a preparation method and application of a porous hydrophilic denitrification biological carrier. The method comprises the following steps of: adding 75 mass parts of polyether polyol, 25 mass parts of polymer polyol, 3 mass parts of blackwash, 2 mass parts of dichloromethane, 0.25 mass part of surfactant, 0.25 mass part of amine catalyst, 0.3 mass part of tin catalyst and 5 mass parts of water into a 23 to 27 DEG C reaction kettle, and stirring; adding 52.5 mass parts of active agent, and uniformly stirring; adding 62.5 mass parts of toluene diisocynate, uniformly stirring, and performing reaction molding; and putting polyurethane foam subjected to reaction molding into a demolding tank, and blasting for demolding to obtain a magnetic biological denitrification carrier. The carrier prepared by the method has adsorption and catalytic oxidation effects and large specific surface area, a highly active biological film can be quickly formed, microbial cells can reproduce and grow on the huge surface of the carrier and absorb and degrade toxic or inhibiting substances, the carrier has a strong nitrification effect and a certain denitrification effect and can remove total nitrogen, and the residual sludge is obviously reduced.

Description

technical field [0001] The invention relates to the technical fields of bioengineering, materials and environmental engineering, in particular to a preparation method and application of a porous hydrophilic denitrification biological carrier. Background technique [0002] The source of ammonia nitrogen wastewater is the discharge of industrial wastewater and the wastewater generated in people's daily life, such as chemical fertilizers, coking, petrochemicals, pharmaceuticals, food, landfills, etc., all produce a large amount of high-concentration ammonia nitrogen wastewater; while the concentration of ammonia nitrogen in domestic wastewater is low, at 25- 50mg / L, but because of its large discharge, it also poses a great threat to the environment. Ammonia nitrogen has a high oxygen consumption, it is toxic to aquatic organisms, and can stimulate its entropy change. The water body contains a large amount of ammonia nitrogen, which causes the water body to produce eutrophicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08K9/00C08K3/08C08K3/34C08K3/04C08G18/48C02F3/10C08G101/00
CPCY02W10/10
Inventor 梅荣武韦彦斐陆建海王付超沈浙萍李欲如
Owner ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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