Review and perspectives of enhanced volatile fatty acids production from acidogenic fermentation of lignocellulosic biomass wastes

Abstract Lignocellulosic biomass wastes are abundant resources that usually valorized for methane-rich biogas via anaerobic digestion. Conversion of lignocellulose into volatile fatty acids (VFA) rather than is attracting attention due to the higher value-added products come with VFA utilization. This review consolidated latest studies associated characteristics lignocellulosic biomass, effects process parameters during acidogenic fermentation, and intensification strategies accumulate more VFA. The differences between digestion technology fermentation were discussed. Performance-enhancing surveyed included (1) alkaline fermentation; (2) co-digestion high solid-state (3) pretreatments; (4) use loading rate short retention time; (5) integration electrochemical technology, (6) adoption membrane bioreactors. recommended operations include: mesophilic temperature (thermophilic fermentation), C/N ratio (20–40), OLR (< 12 g solids (VS)/(L·d)), maximum HRT (8–12 days), or electrodialysis recovery. Lastly, perspectives put place based on critical analysis status production.