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