Relatively many workers in the world are studying different aspects in
SSF processes but few are working on reactor design and scale-up. Fro
m about 10 years, we are developing reactors from lab scale to pilot p
lant, based on the same technology, reactor design and flowsheet to al
low fermentation with a deep layer (up to 1 m in the pilot plant). The
se reactors have all a forced aeration and the possibility or not to a
gitate. Regulations of temperature and water content of the culture ar
e monitored by a special device.