Flat sheet membrane bioreactor

Abstract

The invention relates to a flat sheet membrane bioreactor which comprises an anaerobic pool, an aerobic pool and a membrane component which are sequentially connected, a water inlet is formed in the anaerobic pool, a stirring shaft is vertically arranged in the anaerobic pool, a plurality of stirring paddles are arranged on the stirring shaft at intervals, the lower end of the stirring shaft extends to the bottom part of the anaerobic pool, a plurality of sections of spiral channels are arranged on the inner wall of the anaerobic pool at intervals from top to bottom, each spiral channel is formed by encircling and splicing a plurality of spiral blades fixed on the inner wall of the anaerobic pool, each spiral channel is provided with a penetrating channel for holding the stirring paddle, a filter screen is coated at the periphery of the membrane component, the mesh number of the filter screen is 30-50, the bore diameter of the filter screen is 0.4-0.5mm, and a return passage is arranged between the anaerobic pool and the aerobic pool. The flat sheet membrane bioreactor is simple in structure and high in production rate.

Description

technical field [0001] The invention relates to a flat membrane bioreactor, which belongs to the technical field of sewage treatment. Background technique [0002] Membrane bioreactors are widely used in the field of sewage treatment and reuse. Membrane bioreactors combine biomass and membranes to convert the supplied substances into biological substances. It can be used for biological reactions, for example, to produce useful substances (such as drugs , antibodies or vaccine components), the bioconversion of organic waste into biomass or biofuel, or the remediation of toxic waste, including the degradation of toxic chemicals into inert or non-bioavailable forms, and the precipitation or reduction / oxidation of heavy metals, etc. . [0003] Flat membrane bioreactor, as a kind of membrane bioreactor, has also been widely studied and applied, but the yield of this kind of reactor is relatively low, or the cost is too high because of the use of special membrane. Moreover, the ...

AI Technical Summary

Problems solved by technology

[0003] As a kind of membrane bioreactor, the flat membrane bioreactor has also been widely studied and applied, but the yield of this kind of reactor is relatively low, or the cost is too high due to the use of special membranes

Moreover, the stability and reliability of the entire reactor can be reduced after membrane fouling, and the membrane flux is reduced, thereby reducing the treatment efficiency of the reactor. The fouling of the membrane is mainly caused by the composition of the reactor (water-soluble organic matter, feed colloidal particles, cell lysis and inorganic precipitates)

[0004] In addition, with the application of new industrial fermentation technologies, large-vessel bioreactors have been widely promoted, and foams appear during the fermentation process, which often have adverse effects on production.

Due to the obstacle of foaming, the gas phase in the reactor is occupied by foam, and the amount of material is reduced, which undoubtedly reduces the volumetric efficiency of the reactor, and often due to untimely defoaming, the foam rises and forms a "bubble" phenomenon, resulting in the The efficiency of the membrane module is greatly reduced

Images