With cellulose hydrolyte as raw material to ferment citric acid by Aspergillus niger at constant temperature and under oscillation temperature were discussed and compared.

麦草经碱-氧-蒽醌蒸煮到纤。以纤酶酶解该纤的纤酶解波为原料，在黑曲霉的作用下发酵取柠檬酸。