Informatics Publishing Limited

V. Kavan Kumar ¹, R. Mahendiran ², P. Subramanian ², S. Karthikeyan ², A. Surendrakumar ², Y. Ravi ³, Sharda Choudhary ³, Ravindra Singh ³, Arvind K. Verma ³

Affiliations
1 College of Technology and Engineering, Maharana Pratap University of Agriculture and Technology, Udaipur 313 001, IN
2 Tamil Nadu Agricultural University, Coimbatore 641 003, IN
3 Indian Council for Agricultural Research-National Research Centre on Seed Spices, Ajmer 305 206, IN

Abstract

The present experimental set-up study of tannery fleshings with different inoculum batch sizes, was carried out for an hydraulic retention time of 50 days to check the capability of anaerobic digestion. Biogas production was between 10,102.5 and 14,505 ml/day. The first-order and modified Gompertz models were calibrated using experimental data. For kinetic analysis of biogas production, modified Gompertz models and basic first-order kinetics were employed. In each instance, the kinetic parameters, substrate biogas yield potential, maximal biogas production rate, lag phase time, coefficient of determination and root mean square error were calculated. The model parameters were estimated using the nonlinear regression approach made possible by IBM SPSS software 25.0. Both the models fitted/predicted the experimental data with over 99% accuracy (R² = 0.990–0.999).

Keywords

Anaerobic digestion, biogas first-order kinetics, inoculums, tannery fleshings

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