production of beta-galactosidase in submerged media by aspergillus oryzae, ptcc 5 163

different compositions of liquid media were used for their efficacy in the production of beta-galactosidase by aspergillus oryzae in submerged fermentation. enzyme production was improved by switching from lactose-based media to soybean meal- and wheat bran-based media. further improvement was made when the soybean meal medium was supplemented with sodium nitrate and magnesium sulfate. results also indicate that fungal extracellular beta-galactosidase production occurs concomitantly with growth on complex media but not on lactose- based media. the effectiveness of tween 80 on beta-galactosidase activity was found to depend on the type of the medium used