India’s failure to curb the current practice of burning millions of tons of rice crop residue each year is criticised worldwide as it is associated with environmental pollution and human health hazards. The aim of this work is to use a mathematical model to determine the biogas potential of rice straw when fed into a full-scale biogas plant. The Anaerobic Digestion Model No. 1 (ADM1) was utilized to explore the ideal operating conditions to run a rice straw-based plant for 60 days. The model predictions suggested feeding the industrial plant with rice straw codigested with manure. Stable methane production was projected when 5 and 25% of the feed was rice straw and the rest was manure. An average methane content of 865 m3 and 1100 m3 was predicted by the model when 20m3 of manure was fed with 1m3 and 5m3 of rice straw respectively. This mathematical model could be a useful, efficient and cost-effective tool for predicting energy generation from different organic waste materials.
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