This inoculum was added also to 2700 ml of fermentation medium in order to obtain 10% (v/v) inoculum size as outlined
by The medium was mixed for 45 min at 30 C and has been enriched by adding nutriments: 6 g/L yeast extract, 5 g/L KH2PO4, 1 g/L MgSO4.7H2O; 2 g/L (NH4)2SO4.