Study on the Bio-kinetic Coefficients of Kitchen Effluent using UASB Reactor

Arshad Ali

doi:10.37591/joge.v2i1.3752

Abstract

The upflow anaerobic sludge bed (UASB) reactor was operated at optimum organic loading rate (OLR) of 2.4 kg-COD/m3-day, with hydraulic detention time (HDT) of 10–12 h during the study. It was concluded from the study that the treatment of high-ranged kitchen mill effluent is technically feasible provided that the pH of the system is kept near to neutral. This can be achieved by adding NaHCO3 to the feed solution. The mean determined values of substrate utilization rate constant (K), limiting substrate (Ks), biomass decay constant (Kd) and yielding coefficient (Y) and maximum substrate constant (µmax) obtained while operating the UASB reactor at optimum conditions were 0.23 d−1, 6.55 mg/L, 0.057 d−1, 0.35 and 0.08 d−1, respectively. The calculated concentration of effluent substrate, HDT, effluent biomass and biomass yield were found to be 6.81 mg/L, 0.4 h, 277.34 mg/L and 0.34, respectively. Hence, the values of coefficients K, Ks, Kd, Y and µmax obtained will be used to validate the model and to predict treatment efficiency, and predict organic loading methane productivity of any UASB reactor treating kitchen effluent.