Multi-hole foam glass carrier for fast mass transfer biological fluidized bed and preparation method and application thereof

Abstract

The invention relates to a porous foam glass carrier used in a rapid mass transfer biological fluidized bed and its preparation method and application, and belongs to sewage treatment technology. It is made of waste glass as raw material, mixed with volcanic rock, fly ash, coal gangue, slag, iron powder, aluminum powder, binder, foaming agent, foam stabilizer and flux according to the mass percentage. Through preheating, rapid The sintering, foaming, rapid cooling and annealing stages are porous foam glass. The preparation process route of the present invention is simple, easy to control, and has low production cost. The prepared carrier has stable performance, high porosity, large specific surface area, impact resistance, good mechanical properties, high bioaffinity, and is conducive to the efficient immobilization of microorganisms. It is applicable in a rapid mass transfer biological fluidized bed. It solves the problems of previous biological immobilization carriers in fast mass transfer biological fluidized beds such as easy wear, small amount of film hanging, and low mass transfer effect. This method not only opens up a new way for the preparation of biological carriers, but also fills the gap in the use of foam glass materials in sewage treatment.

Description

technical field [0001] The invention relates to a porous foam glass carrier used for rapid mass transfer biological fluidized bed and its preparation method and application, belonging to the sewage treatment technology. The porous foam glass carrier GM-2 with suitable density is made from waste glass, volcanic rock, slag and other wastes through a simple process. It has low cost and stable performance, and is suitable for rapid mass transfer biological fluidized bed. Background technique [0002] Biological fluidized bed (FBR) wastewater treatment technology is a high-efficiency wastewater biological treatment process developed in the 1970s. It increases the gas-liquid-solid three The relative flow velocity between phases is poor, which accelerates the mass transfer between phases and the replacement of old and new microorganisms, thereby greatly improving the efficiency of biological wastewater treatment. Compared with other bioreactors, the biological fluidized bed has hi...

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Problems solved by technology

However, because the preparation process belongs to the synthesis of organic polymers, the process is cumbersome, the reaction requirements are strict, and the cost is high. At the same time, the polymers are easily biodegradable, which limits its wide application.

At the same time, the density of the polymer carrier is close to that of water, the relative flow velocity difference between the carrier and the liquid phase in the upflow zone of the fluidized bed is small, and the friction of the solid-liquid contact surface is weak, which makes the dynamic turbulence between the carrier and the liquid phase Poor, it is easy to cause the boundary layer of the carrier biofilm cell mass transfer concentration to tend to be stable and restrict the mass transfer efficiency

This situation is more prominent in the downflow zone of the fast mass transfer biological fluidized bed. Under the non-dynamic gravity field, the relative velocity difference between the carrier particles and the liquid phase is very small, and the mass transfer efficiency between the phases is lower. It is easy to cause uneven distribution and affect the mass transfer of microorganisms, thereby reducing the treatment efficiency of the fluidized bed

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