Glucoamylase production by Aspergillus niger in solid state fermentation with paddy husk as support

Aspergillus niger CFTRI 1105 produced the highest amount of glucoamylase 87 5.5 Ug(-1) DS (3rd day) in a medium containing soy meal powder (200.0 g), p addy husk (460.0 g), mineral solution (20.0 ml) and tap water (180.0 ml). G lucoamylase activity obtained in media containing beef and soy meal powder having same elemental nitrogen level and starch concentration were closer t o each other. Optimization of moisture content and spore inoculum size impr oved glucoamylase production with reduction in production time. Optimized a mount of paddy husk to soy meal powder ratio was 7.0:3.0. By optimizing the conditions, production of glucoamylase increased to 1853.7 Ug(-1)DS on the 2nd day.