(544f) Acid Hydrolysis of Glycosidic Bonds in Linear Polysaccharides from Food Waste: Kinetic Studies and Modeling

Starch saccharified glucose from food waste is an important precursor for a variety of renewable chemicals and fuels. Despite numerous studies on hydrolysis of biomass, detailed kinetic studies and associated models of hydrolysis are lacking. We investigated the kinetics of glycosidic bonds scission of malto-oligosaccharides in lithium bromide molten salt hydrate (MSH) medium and estimated rate parameters from experimental data. We find that the terminal non-reducing bonds hydrolyze faster than the other C-O bonds. Next, we extended the model to simulate the hydrolysis of linear and cyclic saccharides of various degree of polymerization and amorphous potato starch. The model is in excellent agreement with the experimentally determined concentrations for glucose and other oligosaccharides. The chain length of polysaccharides was found to be directly related to their hydrolysis rates.