Amylase production by aspergillus niger under submerged fermentation using ipomoea batatas.

Submerged fermentation holds tremendous fungal potentiality in high biomass yield of alpha-amylase. The effect of varying pH, temperature and nitrogen sources of the medium for the productivity of α- amylase from Aspergillus niger utilizing Ipomoea batatas was investigated. The maximum activity of α-amylase was recorded as 450 U/mg after 7 days of submerged fermentation at pH 7.0 and room temperature 28 C. Among the organic and inorganic nitrogen ⁰ sources, inorganic sources showed maximum yield in which ammonium nitrate showed highest amylase activity of 475U/mg at the same pH and temperature. The enzyme produced by Aspergillus niger can be used in industrial process after characterization.