Journal
FUEL
Volume 253, Issue -, Pages 392-399Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2019.05.038
Keywords
Enzymatic hydrolysis; Fed-batch; Kinetic model; Sugarcane bagasse; Lignocellulose
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Funding
- Sao Paulo Research Foundation (FAPESP) [2017/07633-0, 2016/06142-0, 2015/206304]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico - Brasil (CNPq) [155001/2016-7]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) [001]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [16/06142-0] Funding Source: FAPESP
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Choosing the right pretreatment for a specific biomass in order to improve sugar recovery is a key step towards the commercial feasibility of cellulosic ethanol. This article deals with the enzymatic hydrolysis of sugarcane bagasse subjected to either delignification or hydrothermal pretreatment. Two operational strategies were studied: batch experiments were carried out with different solids loads (5-20% w/v) and fed-batch tests reached cumulative solids content of 24% (w/v). The highest glucose concentration (127 g/L) was achieved when working with the delignified material in fed-batch systems. However, the reactions using delignified bagasse presented sharp decrease in conversion when the solids loads exceeded 15% (w/v). During the modeling phase, the hydrolysis behavior was described according to a semi-mechanistic approach. The goodness of fit evaluation showed that the models performed well when compared to the collected data. Finally, fed-batch simulations suggested new feeding polices to increase the final glucose content.
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