THE OPTIMUM MEDIUM OF THE SUSPENDED BIO-MEDIUM AERATION CONTACTOR PROCESS

The purpose of this study is to modify the Fluidized Bed Process. Plac ing various particle diameters of granular activated carbon, (#20 simi lar to#30, #30 similar to#40, #40 similar to#50) as a medium in an aer ation tank, in which microorganisms can attach and grow, improves the biomass concentration, volumetric loadings and removal efficiency. The continuous supply of substrates allows the thickness of bio-film on t he medium to be shifted to a proper state. This is due to a friction f orce effect between the media and the shear force of the agitated flow . After studying the comparisons, it is concluded that the middle part icle size (#30 similar to#40) is the best of the three particle diamet ers as a medium, in that it achieves a high biomass concentration, sta ble treatment and higher efficiency.