Honeycomb-shaped biological filler suitable for microbiologic treatment of wastewater as well as preparation method and application thereof

Abstract

The invention belongs to the field of biological filler, and discloses honeycomb-shaped biological filler suitable for microbiological treatment of wastewater as well as a preparation method and application thereof. The honeycomb-shaped biological filler is prepared from the following preparation raw materials in percentage by mass: 7.1 to 33 percent of a mineral material, 7 to 28 percent of a microporous material, 2 to 10 percent of a pore forming agent and 30 to 60 percent of an inorganic gel material. The pore forming agent can be removed during a preparation process through roasting, coarse pores can be formed, a microporous structure of filler is formed by micro pores brought by the microporous material per se and fine pores formed through accumulation of inorganic particulate matters, an appropriate habitat for microorganism reproduction and growth is formed by enriched hierarchial pore channel structures, sufficient specific surface area and pore walls for supplying trace mineral elements to microorganisms, biofilm forming of the microorganisms on the filler is promoted, conditions are created for matter and energy exchange between the microorganisms and wastewater, and therunning efficiency of the biological filler is increased.

Description

technical field [0001] The invention belongs to the field of biological fillers, in particular to a honeycomb biological filler suitable for microbial treatment of wastewater, a preparation method and application thereof. Background technique [0002] The biofilm method, which degrades harmful substances in wastewater by microorganisms, is a commonly used wastewater treatment method at present. There are many factors that affect the operating efficiency of the biofilm method, but the key technology is the structure and performance of the biofiller. At present, there are many kinds of biological fillers, such as fixed fillers, suspension fillers, suspension fillers and combined fillers, etc., and the materials used are also various, such as polyvinyl chloride plastics, polyurethane foam materials, other modified organic polymers, etc. Objects, metal components and ceramic components, etc. Generally speaking, the larger the specific surface area of ​​the biological filler, t...

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Problems solved by technology

Chinese patent publication CN 108191041 A discloses a magnesium-rich biological filler. By adding magnesium materials, the magnesium content of the filler can be increased to promote microbial activity and improve the ability to treat wastewater. However, this method is monotonous because wastewater is treated by biochemical methods. , depends entirely on the vitality of microorganisms. As microorganisms with life characteristics, the trace elements required are not only magnesium, but also other mineral elements

At the same time, the patent publication has no new method for the molding of the filler, especially for the pore structure, and the filler is a small environment for microorganisms to live in. A suitable multi-level pore structure is not only beneficial to the microorganisms from being washed away by running water, but also has Conducive to the exchange of matter and energy between microorganisms and the environment

Chinese patent publication CN107162171A uses polypropylene and metal salts to prepare biological fillers, but the dissolution of metal salts in water will cause the metal elements to be lost quickly, making it difficult to retain them on the fillers for a long time, and may also cause secondary pollution

Chinese publication CN107139497A uses thermoplastic resin mixed with magnetic materials to make magnetic biological fillers, and promotes the reproduction of microorganisms through a magnetic field. However, these efforts still use high-molecular polymers as the base material, and have not fundamentally changed the high-molecular polymer biological fillers. There are disadvantages such as low film-hanging speed, insufficient film-hanging amount, and poor tightness between biofilm and filler.

In the study of constructing porous fillers, the Chinese publication CN105036302 A uses glass powder and other materials to foam at high temperatures to produce fillers similar to foam glass. This method must be prepared at a high temperature of 1000 ° C, and high energy consumption leads to high Cost, difficult to popularize and apply, and foaming at high temperature, high-viscosity glass fluid, easy to form a closed-cell structure, resulting in the inability to make full use of the internal pores of the filler during application

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