Pulsating fluidized bed sewage treatment device and method

Abstract

The utility model relates to a pulse type fluidized bed sewage treatment device which comprises an anaerobic reactor, an anoxic fluidized bed system and an aerobic fluidized bed system which are sequentially connected in series;the anoxic fluidized bed system comprises a first fluidized bed reactor and a second fluidized bed reactor; a first upper isobaric liquid chamber, a first lower isobaric liquid chamber, a second upper isobaric liquid chamber and a second lower isobaric liquid chamber are respectively arranged at the upper ends and the lower ends of the first fluidized bed reactor and the second fluidized bed reactor; a first motor pump and a second motor pump which are opposite in output direction are arranged on two pipelines connected between the top end of the first upper isobaric liquid chamber and the top end of the second upper isobaric liquid chamber respectively, and the bottom end of the first lower isobaric liquid chamber is communicated with the bottom end of the second lower isobaric liquid chamber through a first return pipe. The structure of the aerobic fluidized bed system is similar to that of the anoxic fluidized bed system. The pulsating liquid speed and the flow speed of liquid in the fluidized bed are changed in a reciprocating mode, the liquid-solid phase relative speed and transmission strength are effectively increased, and then the sewage treatment efficiency is improved.

Description

technical field [0001] The invention relates to a pulsating fluidized bed sewage treatment device and method, belonging to the technical field of sewage treatment. Background technique [0002] The fluidized bed sewage treatment technology was developed in the early 1970s. It combines the traditional activated sludge method and the biofilm method, and introduces the fluidization technology in the chemical industry. It has high mass transfer efficiency, liquid-solid contact The advantages of uniformity have formed a considerable scale and number of applications in the field of sewage treatment at home and abroad. However, the traditional fluidized bed sewage treatment technology mostly adopts hydraulic and gas-driven operation methods, and the relative velocity between the carrier particles attached to the sewage treatment bacteria and the liquid phase, the interphase transfer intensity and the further improvement of sewage treatment efficiency are restricted. Such as the in...

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Problems solved by technology

Such as the invention patent two-phase biological fluidized bed device for sewage treatment (patent number CN171410631448.3) and the sewage treatment system and method of anaerobic fluidized bed-micro-aerobic membrane bioreactor (patent number CN171170131085.8), both Biological fluidized bed is used for sewage treatment, but its structure is unidirectional flow fluidized bed, and the transfer and reaction efficiency between phases is low

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