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Author Adityaa, V. Ganesh ♦ Ranac, S. C. ♦ Jenad, H. M.
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Cylindrical Particle ♦ Experimental Study ♦ Three-phase Fluidized Bed ♦ Pressure Drop ♦ Minimum Liquid Fluidization Velocity ♦ Bed Expansion ♦ Bio-oxidation Process ♦ Good Understanding ♦ Solid Phase ♦ Different Particle Size ♦ Hydrodynamic Characteristic Viz ♦ Bed Pressure Measurement ♦ Solid Support ♦ Continuous Phase ♦ Static Bed Height ♦ Mm Id ♦ Various Low-moderate Density Solid Particle ♦ Flow Regime ♦ Liquid-solid Fluidization ♦ Ceramic Raschig ♦ High Surface Area ♦ Different Shape ♦ Cell Support ♦ Gas Velocity ♦ Gas-liquid Disengagement Section ♦ Expansion Ratio ♦ Hollow Cylindrical Structure ♦ Gas-liquid Distributor Section ♦ 2m-height Vertical Plexiglas Column ♦ Fixed Value ♦ Discontinuous Phase ♦ Mass Transfer Rate ♦ Ceramic Raschig Ring ♦ Test Section ♦ Wastewater Treatment ♦ Co-current Gas-liquid-solid Three-phase ♦ Liquid Velocity ♦ Posse Moderate Density
Abstract Three-phase fluidized beds have been applied successfully in the bio-oxidation process for wastewater treatment in which various low-moderate density solid particles of different shape and size are used as cell support. Ceramic raschig ring possess moderate density and high surface area due to its hollow cylindrical structure, thus can be used as solid support for microorganisms, where higher mass transfer rate can be achieved. In this study the hydrodynamic characteristics viz. the pressure drop, bed expansion and phase hold up of a co-current gas-liquid-solid three-phase fluidized bed has been studied using liquid as the continuous phase and gas as the discontinuous phase. These have been done in order to develop a good understanding of each flow regime in gas-liquid and liquid-solid fluidization. Air, water and ceramic raschig rings are used as the gas, liquid and solid phases respectively. The experiments were carried out in a 100 mm ID, 2m-height vertical Plexiglas column. The column consists of three sections, viz., the gas-liquid disengagement section, test section and gas-liquid distributor section. Bed pressure measurements have been made to predict the minimum liquid fluidization velocity. By keeping gas velocity at a fixed value, the liquid velocity is varied and the effect on minimum liquid fluidization velocity, pressure drop and the expansion ratio was studied for different particle size and static bed height.
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study