Comparative studies on the effect of organic and inorganic nitrogen supplementation of millet and sorghum pomace on the production of three industrial enzymes by Aspergillus niger SL.1

Effect of nitrogen source and supplementation of millet and sorghum pomace on the production of cellulase, amylase and laccase by Aspergillus niger SL.1 was investigated using a submerged culture fermentation. The nitrogen sources (ammonium sulphate, yeast extract groundnut cake and neem seed cake) were supplemented at 5 – 20% level in the pomace medium and fermentation was carried out for 72 hours. Supplementation of both millet and sorghum pomace with 10 – 20% groundnut cake and also 5 – 20% neem seed cake in sorghum pomace media significantly (P Key Words: Nitrogen source, supplementation, enzyme production Biokemistri Vol.16(2) 2004: 64-70