Fig. 6
Effects of different hydrolysis methods on bioethanol yield in polar microalgal biomass. Sonication (Soni.), acid, and amyloglucosidase enzyme (Enzy.) were used for pretreatment, and the pretreated biomass was fermented by Saccharomyces cerevisiae to produce ethanol. Data are shown as the mean ± SD from three independent experiments. YPD yeast extract peptone dextrose