Microalgal internal-circulating fluidized-bed membrane bioreactor

Abstract

The invention discloses a microalgal internal-circulating fluidized-bed membrane bioreactor. The membrane bioreactor comprises a feeding device, a reaction device and a discharging device, wherein the feeding device and the discharging device both communicate with the reaction device; the feeding device is used for discharging sewage into a reaction shell; a partition plate is vertically arranged in the reaction shell and divides the interior of the reaction shell into a reaction area and a mixed reaction area; two end surfaces of the partition plate are fixedly connected with the side wall of an inner cavity of the reaction shell; a gap is reserved between the bottom surface of the partition plate and the lowest end of the bottom surface of a reaction area; the reaction area communicates a mixed reaction area through the gap; the top of the reaction zone communicates with the feeding device; the bottom surface of the mixed reaction area is of a square structure; the bottom end of the inclined bottom surface and the outer edge of the bottom surface of the mixed reaction area are integrally formed; an aeration device is arranged at the bottom of the mixed reaction area; a membrane assembly is vertically arranged in the reaction area; the top of the membrane assembly communicates with the discharging device; and the top of the membrane assembly is fixedly connected with the inner wall of the reaction shell through a bracket.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a microalgae internal circulating fluidized bed membrane bioreactor. Background technique [0002] Biological fluidized bed is a new type of biochemical treatment process that combines chemical technology, biological technology and water treatment technology organically. The biological fluidized bed has both the characteristics of the fixed growth method and the characteristics of the suspension growth method, so it has the advantages of both methods. [0003] Biological fluidized bed can be divided into traditional biological fluidized bed, external circulation biological fluidized bed and internal circulation biological fluidized bed. Circulating biological fluidized bed solves the shortcoming of unstable fluidization of traditional fluidized bed. Compared with the external circulating fluidized bed, the internal circulating biological fluidized bed has the character...

AI Technical Summary

Problems solved by technology

Therefore, membrane bioreactors are widely used in water treatment, but membrane fouling is the main factor limiting the application of membrane bioreactors. How to design and delay membrane fouling is a technical problem to solve the wide application of membranes.

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