Resumen

CUJILEMA-QUITIO, Mario César et al. Lipase production in solid fermentation with aspergillus niger:: ph influence. cen. az. [online]. 2018, vol.45, n.4, pp. 1-9. ISSN 2223-4861.

Obtaining lipases by solid-state fermentation using Aspergillus niger has been a promising process. However, is necessary to determine the most appropriate pH conditions using a medium based on national origin agroindustrial residues. An experiment in which this factor was studied, as well as fermentation time in five levels was designed. The response variables to be measured were enzyme activity and productivity. As result, it was achieved that the maximum productivity values ​​were reached at low initial pH and lower fermentation times. The initial pH of 5 had the highest activity and productivity observed. The maximum productivity at pH 5 was 1.4 IU / hr, achieved at 72 hours, with a lipolytic activity of 210.11 IU / gMS.

Palabras clave : Aspergillus niger; solid fermentation; lipases; pH.

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