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Biogas and Energy Recovery Potential of Organic Fraction of Municipal Solid Waste using Anaerobic Digestion
Abstract
Cow dung was found to be feasible and effective in transforming the organic waste into biogas. The study aims to evaluate the effectiveness of cow dung on the anaerobic digestion of the organic fraction of municipal solid waste. The study was carried out in laboratory-scale batch reactors of 1 liter capacity at mesophilic temperature (i.e., 35°C). The reactors were fed with different loading ratios of OFMSW and cow dung (0.5, 0.63, 0.75, and 1.0). The results obtained revealed that that cow dung is an effective co-digestion substrate for anaerobic digestion, achieving high cumulative biogas yield with stable performance. The reactors with a substrate-to-inoculum ratio of 0.5 showed maximum biogas yield of 186.67 mL/g of volatile solids. A modified Gompertz equation model was used to perform the kinetic studies of the anaerobic batch reactors. The model was used to study the effect of substrate-to-inoculum ratio on biogas generation. The model showed a better fit to the experimental results with R2
values of more than 94% in all the reactors. The model simulation results and the experimental data suggest that co-digestion of OFMSW and cow dung improved the biogas generation, and maximum biogas production could be achieved at a substrate-to-inoculum ratio of 0.5.
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References
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DOI: https://doi.org/10.37628/ijpnc.v8i2.1520
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