Inner-loop three-phase biological fluidized bed type membrane bioreactor (MBR)

Abstract

The invention discloses an inner-loop three-phase biological fluidized bed type membrane bioreactor (MBR). The reactor comprises an inner-loop fluidization region and an MBR membrane bioreaction region, wherein the bottom of the inner-loop fluidization region is communicated with a water inlet pipe; the inner-loop fluidization region comprises an internal cylinder and an external cylinder sleeving the internal cylinder; a gap serving as a downstream area is formed between the internal cylinder and the external cylinder; the internal cylinder is provided with a channel serving as an upstream area; an air-blast system for driving water to rise along the upstream area is arranged inside or at the bottom of the internal cylinder; a packing is arranged in or at the bottom of the internal cylinder; an MBR membrane component is mounted in the MBR membrane bioreaction region; an aerator pipe is arranged at the bottom of the MBR membrane component; the water outlet of the MBR membrane component is communicated with a water producing pipe. The inner-loop three-phase biological fluidized bed is combined with the MBR to form the inner-loop three-phase biological fluidized bed type MBR which is reasonable in spatial arrangement, and therefore, the energy consumption can be further reduced; in addition to treating domestic sewage, the inner-loop three-phase biological fluidized bed type MBR is further capable of treating industrial wastewater in the fields of printing and dyeing process, oils and fats, food, leather and the like.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an internal circulation three-phase biological fluidized bed type MBR membrane bioreactor. Background technique [0002] The internal circulation three-phase biological fluidized bed is an innovative technology developed on the basis of the traditional biological fluidized bed in recent years. At present, it is widely used, and there are many sets of production equipment in operation in China. The internal circulation three-phase biological fluidized bed distinguishes the upflow area and the downflow area in the bed, and uses the density difference between the two areas to promote the fluid to drive the circulation of the carrier. Finally, the carrier and the effluent are separated in the top sedimentation area. Separation is an improved biological fluidized bed. Its advantage is that the mixing and mass transfer conditions are good, and the stratification of the carrie...

AI Technical Summary

Problems solved by technology

[0006] At present, due to the defects of easy pollution and high energy consumption of MBR membrane bioreactor, its application space is greatly limited.

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