Lignocellulosic Biomass Valorisation by Coupling Steam Explosion Treatment and Anaerobic Digestion

Abstract

Lignocellulosic biomass valorisation presents a promising avenue for sustainable and renewable energy production. In this study, the synergistic potential of coupling steam explosion (SE) treatment with anaerobic digestion (AD) was explored to maximize the efficient conversion of lignocellulosic biomass into valuable biogas. The SE process, a cost-effective technique for biomass fractionation, plays a pivotal role in breaking down complex biomass components, rendering them more amenable to subsequent biological treatments. In the present work, we investigated the impact of various SE conditions, including temperature, time, and acid concentration, on the breakdown of lignocellulosic residues. Through the quantification and analysis of sugars and their degradation products, the optimization of steam explosion conditions at lower temperatures and shorter time periods, along with the presence of a lower concentration of acid catalysts, efficiently releases sugars. Maintaining these conditions helps prevent byproducts. The evaluation of the (S/I)vs ratio during anaerobic digestion reveals an optimal 1/2 ratio, maximizing biogas production. This innovative approach demonstrates significant potential for the valorisation of lignocellulosic biomass, contributing to a more sustainable and efficient utilization of renewable resources in the pursuit of clean energy solutions.