Abstract
River basin areas often associated with agriculture, industry and housing are the major source of pollution. This paper was conducted to determine biokinetic coefficients of pilot scale biofilm reactor. The biofilm reactor system (BRS) was installed on Langat River; Malaysia. The system was operated 65 days with different concentrations of mixed liquor suspended solid (MLSS), chemical oxygen demand (COD), and total suspended solids (TSS).Parameters in the influent and effluent of biofilm reactor were determined and biokinetic coefficients of maximum substrate utilization rate (K), half velocity constant (KS), cell yield coefficients (Y), decay coefficient (Kd), and maximum specific growth rate (µmax) were evaluated by Monod equations. Results showed that; the coefficients K, Ks, Y,Kd , and µmax were 1.39 day-1, 53.22 mg/L, 0.302 day-1,0.067 day-1 , and 1.936 day-1. It be can conclude that, all coefficients were in the range of active sludge coefficients that are mentioned in the literature.
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