2.6. Ethanol fermentation of cellulosic hydrolysate
Inoculum was prepared by transferring a loop of cells of S. cerevisiae 316 into a 250 ml flask containing 50 ml of culture medium (30 g l−1 glucose, 5 g l−1 peptone, 3 g l−1 yeast extract), and incubating at 30 °C for 24 h. Cells were harvested by centrifugation (4800 rpm, 5 min), suspended in sterilized water and used to inoculate the fermentation medium.
Cellulosic hydrolysate obtained from fed-batch hydrolysis, supplemented with 3 g l−1 yeast extract and 0.25 g l−1 (NH4)2HPO4, was utilized as a fermentation medium. Ethanol fermentations were carried out at 30 °C under anaerobic conditions, with 0.5 ml of cells suspension inoculated into a 100 ml flask with a working volume of 50 ml.
2.6. Ethanol fermentation of cellulosic hydrolysateInoculum was prepared by transferring a loop of cells of S. cerevisiae 316 into a 250 ml flask containing 50 ml of culture medium (30 g l−1 glucose, 5 g l−1 peptone, 3 g l−1 yeast extract), and incubating at 30 °C for 24 h. Cells were harvested by centrifugation (4800 rpm, 5 min), suspended in sterilized water and used to inoculate the fermentation medium.Cellulosic hydrolysate obtained from fed-batch hydrolysis, supplemented with 3 g l−1 yeast extract and 0.25 g l−1 (NH4)2HPO4, was utilized as a fermentation medium. Ethanol fermentations were carried out at 30 °C under anaerobic conditions, with 0.5 ml of cells suspension inoculated into a 100 ml flask with a working volume of 50 ml.
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