Production of lipase by Rhizopus arrhizus was studied in a rotating biological contactor(RBC)with polyurethane foam(PUF),as a porous biomass support,attached on both sides of the RBC *** effects of aeration rate,rotat...
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Production of lipase by Rhizopus arrhizus was studied in a rotating biological contactor(RBC)with polyurethane foam(PUF),as a porous biomass support,attached on both sides of the RBC *** effects of aeration rate,rotating rate of discs,volume of broth and the number of discs on the lipase activity were studied in the 6 L RBC,and the optimum fermentation condition was as follows:4 L·min-1 aeration rate,100 r·min-1 rotating rate,3.5 L medium with three discs in 6 L *** batch fermentation by immobilized mycelium was tested and it was found that immobilized cells showed high stability for repeated *** repeated batches could be carried out in 6 L RBC and the lipase productivity increased from 3125 U·h-1 in batch fermentation to 9512 U·h-1 in repeated batch fermentation,which was 3 times as high as that in batch fermentation.
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