A comparison between lime and alkaline hydrogen peroxide pretreatments of sugarcane bagasse for ethanol production

Applied Biochemistry and Biotechnology
Sarita C RabeloAline Carvalho Costa

Abstract

Pretreatment procedures of sugarcane bagasse with lime (calcium hydroxide) or alkaline hydrogen peroxide were evaluated and compared. Analyses were performed using 2(3) factorial designs, with pretreatment time, temperature, and lime loading and hydrogen peroxide concentration as factors. The responses evaluated were the yield of total reducing sugars (TRS) and glucose released from pretreated bagasse after enzymatic hydrolysis. Experiments were performed using the bagasse, as it comes from an alcohol/sugar factory and bagasse, in the size, range from 0.248 to 1.397 mm (12-60 mesh). The results show that, when hexoses and pentoses are of interest, lime should be the pretreatment agent chosen, as high TRS yields are obtained for non-screened bagasse using 0.40 g lime/g dry biomass at 70 degrees C for 36 h. When the product of interest is glucose, the best results were obtained with lime pretreatment of screened bagasse. However, the results for alkaline peroxide and lime pretreatments of non-screened bagasse are not very different.

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Citations

Sep 13, 2011·Bioprocess and Biosystems Engineering·Hee-Kyoung Kang, Doman Kim
May 5, 2010·Applied Biochemistry and Biotechnology·Yu-Shen ChengJean S VanderGheynst
Aug 31, 2010·Applied Biochemistry and Biotechnology·Laura L G FuentesAline C Costa
Sep 15, 2010·Journal of Industrial Microbiology & Biotechnology·Marina O S DiasCarlos E V Rossell
Oct 26, 2012·Journal of Biomedicine & Biotechnology·Jinaporn WongwatanapaiboonWarawut Chulalaksananukul
Mar 12, 2013·Bioprocess and Biosystems Engineering·João Moreira NetoAline Carvalho da Costa
Dec 8, 2011·Biotechnology for Biofuels·Fernando MasarinAdriane Mf Milagres
Jan 22, 2013·Applied Biochemistry and Biotechnology·Sarita C RabeloAline C Costa

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