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

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 in particular relates to a new high-efficiency biological carrier for sewage biological treatment and a preparation method thereof. Background technique [0002] Sewage (including waste water) biological treatment includes activated sludge method and biofilm method. At present, sewage biological treatment plays an important role: ① About 60% of the organic matter in urban sewage can only be removed by biological methods; ② Generally speaking, the removal of nitrogen in sewage can only rely on biological methods; More than 90% of urban sewage treatment plants use biological treatment methods; ④ most industrial sewage or wastewater treatment plants also use biological methods as the main body. [0003] The core part of sewage biofilm treatment is the carrier of biofilm. Microbes attach to the surface of the biological carrier and use their own metabolism to absorb pollutants in the water to pur...

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 molecular resin is polyethylene, polypropylene, polystyrene, powdery rubber, and its preparation The method needs to be ground and sieved, and the preparation process is relatively complicated. The biological carrier is a particle with a particle size of 0.043-0.315mm. The shape of the biological carrier is single, which limits its scope of application and the specific surface area of ​​the biological carrier; the cost is high ;The product density is 1.0~1.4g / cm 3 , there is not much room for adjustment, and the scope of use is limited; the surface is a non-polar or weakly polar polymer material, and its bioadhesion is not enough