Citric acid is a tri carboxylic organic acid, soluble in water with pleasant taste and is the most important acid used in the food industries. The present work deals with determination of optimum growth conditions for citric acid production by submerged fermentation technology using Wild strain of Aspergillus Niger. The Fermentation is carried on by providing various kinds of growth conditions like different temperatures, pH and different combinations of media of Paddy and Sorghum and the combination at which the yield of Citric acid is maximum is determined as optimum conditions for Citric...