Research On New Inner Loop Three Phase Fluidized Bed

The characteristics and work principles of aerobic biological fluidized bed are reviewed in this article .The advances of research and application of this technology in the field of waste water treatment are summarized .The problems at present and research topic in the fuature are analyzed. And investigate the character of new inner loop three phase fluidized bed reactor which applied aeration with an ejector:the filling,fludization regime,and the condition of starting up,and study on the bean product wastewater treatment. As intermittent orbit, the results show that the water volume and air volume are the most important effection factors. Better biofilm can be form in the filling with rice chaff by aeration with an ejector and high concentration of inoculable sludge.the average COD removal rate was beyond 95% when COD was 3000~ 4000mg/L around, and discharge of the circulation water was between 100~200L/h, and the aeration strength was 40-60L/h, the volumetric load could achieve 10kg/m3. As continuous orbit, the results show that the effluent COD concentration met with the national first class when the concentration of the circulation water was less than 400mg/L, and discharge of the circulation water was 100L/h.Analyse the theory of new inner loop three phase fluidized bed reactor in four aspects: characteristics of fluidization, model of CSTR, kinetics of biofilm and performance of fluidized bed.