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-蒽醌蒸煮脱木素后得到纤维素。以纤维素酶酶解该纤维素后制得的纤维素酶解波为原料，在黑曲霉的作用下发酵制取柠檬酸。