Abstract
To investigate the potential of efficient ethanol fermentation from a waste source, we investigated the amount of organic acid and ethanol produced from the ethanol fermentation process by omitting the saccharification step. The waste source used was simulated raw garbage inoculated with Saccharomyces cerevisiae. Both the composite anaerobic microbial flora of the simulated raw garbage and S. cerevisiae produced ethanol preferentially, with a similar trend in the amount and type of the organic acids produced. In this modified fermentation process, as the amount of the solid content in the waste source reduced, the ratio of the yeast inoculation was increased. In this study, the optimum yeast input of 3.45 g/kg of simulated raw garbage was obtained under our experimental conditions, with an optimum operation time of 18 h.
