Batch fermentations in the shaking flasks for ethanol production were carried out in triplicate with the initial total sugar content of 11.13%. The ethanol yield (%), which is defined as a percentage of the actual ethanol output to the theoretic ethanol output, was introduced in this study to judge the ethanol production in the fermentation. The fermentation effectiveness can be described by ethanol content, residual sugar content, and ethanol yield. Table 3 shows L9 (34) orthogonal experiment results at the fermentation time of 9 h.