Evaluation of Ultrasound Waves on S. cerevisiae Stimulation in the Bioethanol Production from Rice Bran

The ultrasound exposure can affect the Saccharomyces cerevisiae growth and metabolic product generation. This study evaluated the effect of ultrasound on S. cerevisiae stimulation in lag and exponential phase cultured in defatted rice bran (DRB) employing a full-factorial design. Firstly, the DRB was hydrolyzed by protease, α-amylase, and amyloglucosidase; the hydrolyzed DRB (HDRB; 30 g L−1) was used as substrate for S. cerevisiae. The variables...