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-氧-蒽醌蒸煮脱木素后得到纤素。以纤素酶酶该纤素后制得的纤素酶原料，在黑曲霉的作用下发酵制取柠檬酸。