High-efficiency and novel biological carrier for sewage biological treatment and preparation method thereof

A technology for biological sewage treatment and biological carrier, which is applied in the field of high-efficiency new biological carrier for biological sewage treatment and its preparation, can solve the problems of poor adhesion of microorganisms, high cost, small specific surface area, etc. The effect of large specific surface area

Inactive Publication Date: 2009-09-23
常州华钛化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They generally have the disadvantages of high energy consumption for circulatory reflux, small specific surface area, difficult carrier stripping, complex preparation process, high raw material cost and high use cost, etc.
[0004] The magnetic biological carrier used in the sewage treatment of activated sludge method is added to the aeration tank to help increase the biological concentration and improve the efficiency of sewage treatment. Disadvantages of high cost and poor microbial adhesion
CN101254976A discloses magnetic biocarrier, its component is magnetic particle 7~21wt%; High molecular polymer 79~93wt%, described high mole

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Polypropylene (resin) (2500g), 10% maleic anhydride vinyl acetate (wherein the ratio of maleic anhydride to vinyl acetate 1:1) is co-grafted with polypropylene resin (500g), nano-scale silica (1500g) ), hemp fiber (500g), waste rubber fine powder (500g), and trace antioxidant 1010 are fully mixed by a high-speed mixer, and then added to the injection molding machine. In the barrel of the injection molding machine, the polypropylene resin, horse Co-grafted polypropylene resin and SiO with acid anhydride and vinyl acetate 2 Fully mix with hemp fiber and waste rubber powder, after extrusion, two injection molding or direct injection molding into a solid elastic packing, combined packing, folding packing, hexagonal honeycomb packing or soft packing, the density is about 1.03g / cm 3 Biological carrier S-01. Can be used for biological contact oxidation.

Embodiment 2

[0043] Polypropylene resin (3750g), 15% maleic anhydride acrylic acid (ratio of maleic anhydride to acrylate 10:5) co-grafted polypropylene resin (500g), nano-scale silica (500g), trace antioxidant 1010 and Fe 3 O 4 After the magnetic particles (250g) are fully mixed by a high-speed stirrer, they are added to the plastic extruder. In the barrel of the plastic extruder, the polypropylene resin, maleic anhydride acrylic acid grafted polypropylene resin and dioxide are melted. Silicon, Fe 3 O 4 The magnetic particles are fully mixed, extruded and cut to form particles containing magnetic particles. Then the particles are ground with a plastic pulverizer to obtain a particle size of about 10 -6 ~10 -7 Micron-level magnetic carrier with a density of about 0.98g / cm 3 , The magnetic biological carrier S-02 was obtained.

Embodiment 3

[0045] Polyethylene resin (3000g), 25% maleic anhydride vinyl acetate grafted polyethylene propylene copolymer resin (500g), nano-scale calcium carbonate (1000g), rice husk powder (500g), thoroughly mixed with a high-speed mixer , Added to the injection molding machine, in the barrel of the injection molding machine, the polyethylene resin, maleic anhydride vinyl acetate grafted polyethylene propylene resin, SiO 2 Fully mix with rice husk powder, injection molding, into a triangular wave-shaped filler, or hollow sphere, fiber or net shape, to obtain a density of about 1.02g / cm 3 Biological carrier S-03.

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Abstract

The invention relates to a high-efficiency and novel biological carrier for a sewage biological treatment and a preparation method thereof. The biological carrier is prepared by comprising the following steps of: blending, extruding or injection-molding the following components: PP, PE, and ethylene-propylene copolymer, compatilizer, inorganic materials, plant materials, magnetic particles, and waste rubber according to a certain proportion, thus providing a biological carrier with large specific surface area, high hydrophilicity and easy hanged membrane on surfaces. The shapes of the biological carriers can be spherical, fibrous and polyhedral or powdery with various forms. The chemical or physical methods such as grinding, acid base reaction, coating on surface and the like can also be carried out to prepare the biological carrier, thus further improving the specific surface area, strengthening the adhesive ability of the biological membrane on the carrier, and improving the microorganism concentration. The preparation method of the biological carrier provided by the invention is simple, has wide adjusting range of the carrier density, easy obtaining materials, low cost, high efficiency of eliminating COD and variety shapes, can be lighter or heavier than water, and is applicable to all biological wastewater treatments.

Description

Technical field [0001] The invention belongs to the field of sewage treatment, and particularly relates to a novel high-efficiency biological carrier for sewage biological treatment and a preparation method thereof. Background technique [0002] Biological treatment of sewage (including wastewater) includes activated sludge method and biofilm method. At present, biological treatment of sewage has its important position: ① About 60% of the organic matter in urban sewage can only be removed by biological method, which is the most economical; ②Removal of nitrogen in sewage generally only depends on biological method; ③Currently, it has been completed in the world. More than 90% of the urban sewage treatment plants in China are biological treatment methods; ④ Most industrial sewage or wastewater treatment plants are also dominated by biological methods. [0003] The core part of sewage biofilm treatment is the carrier of biofilm. Microbes are attached to the surface of the biological...

Claims

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Application Information

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IPC IPC(8): C02F3/10C02F3/12
CPCB29B7/007
Inventor 徐俊伟蔡卫滨黄建朱志翔沙晓峰
Owner 常州华钛化学有限公司
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