Brazilian Journal of Microbiology
versão impressa ISSN 1517-8382
PASTOR, Maria Delia; LORDA, Graciela Susana e BALATTI, Antonio. Protease obtention using Bacillus subtilis 3411 and amaranth seed meal medium at different aeration rates. Braz. J. Microbiol. [online]. 2001, vol.32, n.1, pp. 6-9. ISSN 1517-8382. http://dx.doi.org/10.1590/S1517-83822001000100002.
The influence of the addition of Amaranthus cruenthus seed meal to the medium, as nutrient and growth factor, on protease production by Bacillus subtilis 3411 was studied. Tests were carried out in a rotary shaker and in mechanically stirred fermenters. The influence of aeration was also evaluated. The addition of amaranth in a concentration of 20 g/L resulted in 400% increase in protease production. Aeration up to 750 r.p.m. and 1 L/L.min had a favorable effect.
Palavras-chave : Proteases; Bacillus subtilis; amaranth; fermentation.