Batch fermentation, semi-continuous fermentation and continuous fermentation can be employed. To guarantee the stability of fermentation temperature, the heat exchanger outside the fermentation tank is for circulating cooling. Regarding the batch fermentation, at the early stage of the fermentation, fermentation temperature is controlled at about 32 ℃; at the middle stage, temperature shall not exceed 36 ℃; at the late stage, gradually cool down, let natural fermentation go on until it ends. Fermentation time is controlled at about 58 + 2 hours. Cassava feedstock fermented alcohol content is controlled above 12% (V/V), corn feedstock fermented alcohol content is controlled above 14% (V/V). CO2 gas overflows with light wine volatilization during the fermentation, install a light wine collecting device to recover the light wine.
|Interval fermentation||Continuous fermentation|