Integrative composite structure of marine internal and external circulation three-phase biological fluidized beds

Abstract

The present invention relates to an integrative composite structure of marine internal and external circulation three-phase biological fluidized beds. The integrative composite structure is composed of an external circulation three-phase biological fluidized bed (TBFB), an inner circulation three-phase biological fluidized bed (also called airlift inner circulation suspended filler fluidized bed, ACFB), suspended fillers and an air pump, wherein the external circulation three-phase biological fluidized bed is composed of a main bed and an auxiliary bed connected with the main bed by virtue of an upper communicating pipe and a lower communicating pipe, and a sewage inlet is arranged on the bottom of the main bed; the inner circulation three-phase biological fluidized bed comprises a main bed and an auxiliary bed which are embedded together, the main bed is embedded in the auxiliary bed, a settling bed is arranged above the auxiliary bed or a settling bar is arranged in the auxiliary bed to serve as a water outlet, a solid-liquid separating hopper is arranged below the auxiliary bed, the main beds of the outer circulation three-phase biological fluidized bed and the inner circulation three-phase biological fluidized bed are connected with the air pump to be supplied with power by the air pump, the auxiliary beds are combined into a whole, and the suspended fillers containing biological species are filled in the structure. The integrative composite structure provided by the invention has the advantages of being compact in structure, high in efficiency, low in energy consumption and capable of being industrialized, having nitrification and denitrification functions and the like.

Description

technical field [0001] The invention relates to integrated sewage treatment equipment, in particular to a composite structure of a marine internal and external circulation three-phase biological fluidized bed. Background technique [0002] In the 1970s, based on the biofilm method, it absorbed the fluidization technology in chemical operations and formed an efficient wastewater treatment process, a three-phase biological fluidized bed. According to its biofilm characteristics and other factors, it can be divided into two categories: aerobic biological fluidized bed and anaerobic biological fluidized bed; according to its circulation structure, it can be divided into two types: external circulation biological fluidized bed and internal circulation biological fluidized bed. category. The anaerobic biological fluidized bed can be regarded as a special three-phase fluidized bed with zero gas inlet velocity. [0003] The aerobic biological fluidized bed is suitable for the trea...

AI Technical Summary

Problems solved by technology

[0012] 1. Most of the current treatment devices simply copy the urban domestic sewage treatment process, or blindly pursue the immature membrane bioreactor technology (MBR) for black water treatment

[0013] 2. The volume of the treatment device required by the traditional biological hydraulic retention time (HRT) has great difficulties in its installation and layout for the limited engine room space of the ship

[0014] 3. Due to the impact of hull shaking and hydraulic shock load, the SS index value (30mg / L) of the water outlet may greatly exceed the standard

[0015] Therefore, for some ships, the reliability, economy, and operability of their treatment devices cannot well meet the needs of actual domestic sewage treatment.

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