Fig. 1From: Looking into the world’s largest elephant population in search of ligninolytic microorganisms for biorefineries: a mini-reviewHighlights lignocellulosic biomass pretreatment leading to the release of cellulose, hemicellulose (their value-added products) and lignin. Some of the challenges of biological lignin valorisation are highlighted. Adapted and modified from [52, 53]Back to article page