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

Abstract

The invention relates to a multi-hole foam glass carrier for a fast mass transfer biological fluidized bed and a preparation method and application thereof, which belong to sewage disposal technology. The multi-hole foam glass carrier is prepared by using waste glass as a raw material to be composited with volcanic rocks, coal ash, coal gangue, furnace clinker, iron powder, aluminum powder, binding agents, foaming agents, foam stabilizer and fluxing agents by weight, and multi-hole foam glass is obtained by stages of preheating, fast sintering, foaming, fast cooling and annealing. The preparation process of the multi-hole foam glass carrier is simple in route, easy to control and low in cost, and the prepared carrier is stable in performance, high in porosity, large in specific surface area, resisting in impact, good in mechanical performance, high in biocompatibility, favorable to efficient fixing of the microorganism, and suitable to the fast mass transfer biological fluidized bed. The multi-hole foam glass carrier solves the problem that biological immobilization carriers in the prior art are easy to abrade, small in bio-film formation amount, low in mass transfer effects and the like in the fast mass transfer biological fluidized bed. The preparation method opens up new approaches for preparing the biological carriers, and fills blank spaces in using of foam glass materials in sewage disposal.

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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