Abstract
Abstract:In this study, we investigated the use of laboratory
batch anaerobic digester to derive kinetics parameters for
anaerobic co-digestion of cow dung and grass clippings. The
Carbon/Nitrogen (C/N) ratio of cow dung was found to be
17.17 and grass clippings to be 20.54. Through co-digestion, the
C/N ratio settled at 19.08. Laboratory experimental data from
10 litres batch anaerobic digester operating at mesophilic
temperature of 37 0C and pH of 6.9 was used to derive
parameters for Modified Gompertz model. The actual biogas
yield was found to be 4370 ml/g COD. In the model of biogas
production prediction, the kinetics constants of A (ml/g COD),
μ (ml/g COD. day), λ (day) were 4319.20, 939.71, 1.91
respectively with coefficient of determination (R2) of 0.996.