Kinetics of ethanol production from sugarcane bagasse enzymatic hydrolysate concentrated with molasses under cell recycle

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• 作者：Rafael Ramos de Andrade^a ; ^{rafaelra20012001@yahoo.com.br} ; Francisco Maugeri Filho^b ; Rubens Maciel Filho^a ; Aline Carvalho da Costa^a ; ^{accosta@feq.unicamp.br}
• 关键词：Fermentation ; Hydrolysates ; Cellular recycling ; Modeling ; Kinetics
• 刊名：Bioresource Technology
• 出版年：2013
• 出版时间：February, 2013
• 年：2013
• 卷：130
• 期：Complete
• 页码：351-359
• 全文大小：944 K

文摘

In this work, a kinetic model for ethanol fermentation from sugarcane bagasse enzymatic hydrolysate concentrated with molasses was developed. A model previously developed for fermentation of pure molasses was modified by the inclusion of a new term for acetic acid inhibition on microorganism growth rate and the kinetic parameters were estimated as functions of temperature.

The influence of the hydrolysate on the kinetic parameters is analyzed by comparing with the parameters from fermentation of pure molasses. The impact of cells recycling in the kinetic parameters is also evaluated, as well as on the ethanol yield and productivity. The model developed described accurately most of the fermentations performed in several successive batches for temperatures from 30 to 38 ¡ãC.