The fermentation process of converting fumaric acid to L-malic acid with Aspergillus wentii F-891 in 500L fermentor was studied. The factors, such as aeration, speed of agitator, temperature, pH were investigated.

• 以延胡索酸为原料、温特曲霉AspergilluswentiiF-891为菌种,在500L,发酵罐中进行了液体深层发酵生产L-苹果酸的工艺研究,探讨了通风量、搅拌转速、温度、pH等因素对延胡索酸转化率、L-苹果酸产率的影响。