A new algorithm to characterize biodegradability of biomass during anaerobic digestion: Influence of lignin concentration on methane production potential

► We examined the influence of fibrous fractions on biochemical methane potential. ► Lignin in crops had a greater effect than in animal manures on methane potential. ► Lignin was the strongest predictor of biochemical methane potential. ► Methane potential models were successfully built by lignin for both groups. ► A combined model of animal manure and crops for methane potential was validated.