抄録
This study focuses energy efficiency evaluation in microalgae oil extraction process by middle temperature and low pressure hydrothermal treatment, and proposes optimization method for oil productivity by controlling temperature, pressure, moisture content, and processing time as physical parameters. Native microalgae (Desmodesmus sp.) in Minamisoma City, Fukushima Pref. were used in this research. 50 g microalgae was used for hydrothermal treatment after primary dewatering as pretreatment. Lipid quality and quantity were measured in before and after treatment by the methanol extraction. 0.22 of energy profit ratio (EPR) was calculated by 2,203 kJ of input energy in this experiment from the viewpoint of oil production, and 1.27 of EPR was calculated by 385 kJ of theoretical energy consumption.
