Abstract
It is necessary to estimate kinetic parameters and distinguish between several wastewater components in terms of the Activated Sludge Models (ASM). To determine these parameters and components of Hachinohe Technical College wastewater, the oxygen uptake rates were measured in two batch experiments at high and low F/M rat io (initial ratio between wastewater and biomass). The calibration of the ASM No.1 simplified by Kappeler and Gujer and the ASM No.3 with the batch experiments estimated the kinetic parameters of heterotrophic organisms and the initial concentrations in COD biodegradable fractions. These calculations showed that the concentration of a hydrolysable fraction, Xs, 0 was adversely proportional to hydrolysis rate coefficient, kh of the simplified ASM No.1 and two condi t ions at different F/M ratio resulted in a great change only in kh and saturation coefficient, Ks of the both ASM models. The concentration of Xs, 0 measured in around 40% of total COD in the both models was low compared with European municipal wastewater.
