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Novel environment-friendly packing for mobile bed biofilm method and preparation method thereof

A biofilm method and fluid bed technology, applied in sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problem of poor hydrophilic performance and biological affinity, complicated molding processing steps, and easy aging of fillers. and other problems, to achieve the effect of improving permeability, improving material exchange capacity, and completely degrading

Active Publication Date: 2018-10-26
四川维思达医疗器械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, due to the poor hydrophilicity and bio-affinity of the common polyvinyl chloride biofillers on the market, there are deficiencies in the film-hanging speed, the amount of film-hanging, and the tightness between the film and the filler. Substances) Add appropriate substances to the filler for blending modification, which is expected to improve the mass transfer, 2 film formation and water treatment performance of the filler
In addition, the impact strength of PVC is only 2-5kJ / m, which has the disadvantages of low impact strength and poor thermal stability, which makes the filler easy to age and has a short service life.
And the molding process steps are cumbersome, resulting in a lot of waste of raw materials, so it is urgent to develop an environmentally friendly filler with simple structure, high processing efficiency and strong durability

Method used

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  • Novel environment-friendly packing for mobile bed biofilm method and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method of the novel environment-friendly packing used in the fluidized bed biofilm method is characterized in that it comprises the following steps: (1) pulverizing carbonized rice husk powder, diatomaceous earth, and calcium hydroxyphosphate until the particle size is below 200 mesh, and carbonizing Mix 7.5 parts of rice husk powder, 7.5 parts of diatomaceous earth, 7.5 parts of calcium hydroxyphosphate, 50 parts of PVC elastomer, 30 parts of polyvinyl alcohol resin, 4 parts of hard acid, 3 parts of polyacrylamide, and 15 parts of isopropyl chloride Stir evenly and at high speed, add the above-mentioned mixture into the foam molding machine to melt and foam; (2) Then inject it into the mold to form inner layer filled microspheres with a diameter of 1.5cm; (3) Fill the inner layer with 60 pieces The filled microspheres are added to the outer mesh bag with a mesh diameter of 0.5cm. The material of the outer mesh bag is thermoplastic resin, which is polypro...

Embodiment 2

[0024] The preparation method of the novel environment-friendly packing used in the fluidized bed biofilm method is characterized in that it comprises the following steps: (1) pulverizing carbonized rice husk powder, diatomaceous earth, and calcium hydroxyphosphate until the particle size is below 200 mesh, and carbonizing Mix 10 parts of rice husk powder, 5 parts of diatomaceous earth, 10 parts of calcium hydroxyphosphate, 40 parts of PVC elastomer, 40 parts of polyvinyl alcohol resin, 2 parts of hard acid, 5 parts of polyacrylamide, and 10 parts of isopropyl chloride Stir evenly and at high speed, add the above mixture into the foam molding machine to melt and foam; (2) Then inject it into the mold to form inner layer filled microspheres with a diameter of 2cm; (3) Fill the inner layer with 20 The microspheres are added to the outer mesh bag with a mesh diameter of 0.6cm. The material of the outer mesh bag is thermoplastic resin and polypropylene, which is fixed so that it ca...

Embodiment 3

[0026] The preparation method of the new environment-friendly packing used in the fluidized bed biofilm method is characterized in that it comprises the following steps: (1) pulverizing carbonized rice husk powder, diatomaceous earth, and calcium hydroxyphosphate until the particle size is below 200 mesh, and carbonizing Mix 5 parts of rice husk powder, 10 parts of diatomaceous earth, 5 parts of calcium hydroxyphosphate, 60 parts of PVC elastomer, 20 parts of polyvinyl alcohol resin, 6 parts of hard acid, 1 part of polyacrylamide, and 20 parts of isopropyl chloride Stir evenly and at high speed, add the above-mentioned mixture into the foam molding machine to melt and foam; (2) Then inject it into the mold to form inner layer filled microspheres with a diameter of 1cm; (3) Fill 100 inner layer The microspheres are added to the outer mesh bag with a mesh diameter of 0.3cm. The material of the outer mesh bag is thermoplastic resin and polypropylene, fixed to a point where it cann...

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Abstract

The invention provides novel environment-friendly packing for a mobile bed biofilm method. The novel environment-friendly packing for the mobile bed biofilm method is characterized by comprising an external-layer mesh bag and inner-layer filling microspheres; the inner-layer filling microspheres comprise, by mass, 5-10 parts of carbonized rice husk powder, 5-10 parts of diatomite, 5-10 parts of hydroxy calcium phosphate, 40-60 parts of PVC elastomer, 20-40 parts of polyvinyl alcohol resin, 2-6 parts of stearic acid, 1-5 parts of polyacrylamide and 10-20 parts of foaming agent; the external-layer mesh bag is thermoplastic resin and adheres to the surfaces of the inner-layer filling microspheres through thermal treatment. The novel environment-friendly packing for the mobile bed biofilm method is simple in structure, can lower the production cost, and is environmentally friendly, easy to degrade, large in hanging film amount, and high in sewage treatment efficiency.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a novel environmentally friendly filler used in a fluidized bed biofilm method and a preparation method thereof. Background technique [0002] Ammonia nitrogen in sewage is the main pollution source. At present, the main removal methods for ammonia nitrogen include physical adsorption, catalytic oxidation and biological pretreatment. Ammonia nitrogen is a polar molecule, so it is necessary to modify common adsorbents, such as activated carbon, zeolite, ceramsite, etc., and the adsorption effect is limited, and it needs to be regenerated when it reaches saturation. The comprehensive treatment effect and economy are more suitable for sudden pollution. As a conventional treatment method; ammonia nitrogen is extremely stable in water bodies, and it is difficult to oxidize it with general oxidants. Catalytic oxidation is generally used, but the effect is not good and the op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/10C08J9/14C08J3/28C08L27/06C08L29/04C08L33/26C08K13/04C08K7/26C08K3/04C08K3/32C08K5/09
CPCC02F3/00C02F3/105C02F3/108C02F2003/001C08J3/28C08J9/0023C08J9/0061C08J9/0066C08J9/0085C08J9/145C08J2203/142C08J2327/06C08J2429/04C08J2433/26C08K3/04C08K5/09C08K7/26C08K13/04C08K2003/325C08K2201/003Y02W10/10
Inventor 徐雄剑
Owner 四川维思达医疗器械有限公司
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