To maintain the temperature and water content of the bed, the
relative humidity of the inlet air constant at 90%, and by
manipulating the flow rate and temperature of the air supplied to the
bioreactor.
Mixing events is three to four “turnings” during the 48 h cultivation
For the first 10 h, an air flow rate is at 750 m3/ h (i.e., about 7 vvm)
at 29°C and the air flow rate increase to 1000 m3/h as the growth
rate accelerates (i.e., about 9 vvm) at 26°C.