L-Asparaginase production was scaled up in a 30-L bioreactor (Scigenics, India) with a working volume of 22.5 L. RSM-optimized Czapek Dox Medium was inoculated with 2% (v/v) inoculum raised in nutrient broth (O.D. 1.0) and fermentation was carried out at pH 6.0, 37 C and agitation of 200 rpm for 24 h. Air flow rate was maintained at 0.75 vvm. Foaming was controlled by addition of sterilized silicon antifoam. Samples were withdrawn every 2 h for analysis.