BIOTRANSFORMATION OF SOLID-WASTE FROM CASSAVA STARCH PRODUCTION BY RHIZOPUS IN SOLID-STATE FERMENTATION .3. SCALE-UP STUDIES IN DIFFERENT BIOREACTORS

Scale-up studies on different types of bioreactors having in mind the biotransformation of solid waste (cassava bagasse) from cassava starch production by Rhizopus fungi in solid state fermentation was realised . The results showed that the bioreactors tray like type were the ones that had best performance on scale-up studies of 1:100. The effect of thickness of the fermentation bed in that type of bioreactor showed u s that it is possible its operation on layers from 6 to 8 cm without c onsiderable loss to the growth of the fungi. After the biotransformati on the flour of cassava bagasse obtained showed an absency of undesira ble bacteria and perfectly inside the microbiological standards demand ed by the existing law. The final of real proteins was about 13.5 g/10 0g of dried cassava bagasse in biorector type tray.