P-20 Behavior of Uronic Acid during Hydrothermal Pretreatment of Kelp

Abstract

Recently, using the renewable energy is important. The marine biomass is one of the renewable energy. Kelp is a type of brown algae included in marine biomass, natural crop yields in japan account for more than 70 %. In this research, kelp was treated by continuous flow reactor under hydrothermal condition. The experimental condition, temperature is 170 ℃, the operating pressure is 5 MPa, and residence time is between 2, 5, and 15 min. Finally, mannitol and guluronic acid (GA) was obtained. Recovery of GA was decreased in accordance with the residence time became longer, but at 15 min, the amount of GA decreased.