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  • Title: Comparison of pretreatment strategies of sugarcane baggase: experimental design for citric acid production.
    Author: Khosravi-Darani K, Zoghi A.
    Journal: Bioresour Technol; 2008 Oct; 99(15):6986-93. PubMed ID: 18334291.
    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.
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