title: Comparison of pretreatment strategies of sugarcane baggase: experimental design for citric acid production.
abstract: Solid state fermentation was carried out to compare efficiency of acid, alkaline and urea pretreatment of sugarcane bagasse for production of citric acid using Aspergillus niger ATCC 9142. Plackett-Burman statistical design was used to evaluate significance of variables. Pretreatment of bagasse by urea was known as the most influential treatment to increase citric acid production (137.6g/kg of dry sugarcane bagasse and citric acid yield of 96% based on sugar consumed). Finally, up scaling was achieved to a 20L solid state fermentor in which humidity was constant in gas phase and urea-treated sugarcane bagasse. The produced acid concentration and yield in fermentor was 82.38g/kg of dry substrate and 26.45g/kgday, respectively.
authors.affiliation: Department of Food Technology Research, National Nutrition and Food Technology Research Institute, Shaheed Beheshti University, M.C., P.O. Box 19395-4741, Tehran, Iran. kiankh@yahoo.com
authors.forename: Kianoush
authors.initials: K
authors.lastname: Khosravi-Darani
authors.forename: Alaleh
authors.initials: A
authors.lastname: Zoghi
mesh_terms: D019343:Citric Acid / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D031786:Saccharum / Q000737:chemistry*; D013696:Temperature
chemical_list: D019343:Citric Acid