G. NA RAYANAMURTHY, Y. L. IZAMACHANDRA, S. PADMALATHA RAI, P. S. SUJAN GA NAPATHY, B. T. KAVITHA AND Y.N. MANOHARA,
Abstract
A comparative study on three different fermentation techniques was carried out for citric acid production by a new soil isolate Aspergillus niger RCNM 17 using Shu and Johnson's (1948a) medium. A. mger RCNM 17 produced highest titer of citric acid in Solid State Fermentation (61.08 g citric acid at 72 h with 43.61 % and 53.19 °AD conversions based on the total initial sugar and the sugar consumed during fermentation respectively) compared to Submerged Fermentation (10.23 g citric acid/1 at 168 h with 7.32 and 9.65 % conversions based on the total initial sugar and the sugar consumed during fermentation respectively) and Liquid Surface Fermentation ( 24.37 g citric acid/1 at 144 h with 17.40 % and 24.72 `)/0 conversions based on the total initial sugar and the sugar consumed during fermentation respectively).