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metadata.artigo.dc.title: Mixing design for enzymatic hydrolysis of sugarcane bagasse: methodology for selection of impeller configuration
metadata.artigo.dc.creator: Corrêa, Luciano Jacob
Badino, Alberto Colli
Cruz, Antonio José Gonçalves
metadata.artigo.dc.subject: Bioethanol
Mixing time
Power consumption
Tempo de mistura
Consumo de energia
Aumento de escala
metadata.artigo.dc.publisher: Springer Feb-2016
metadata.artigo.dc.identifier.citation: CORRÊA, L. J.; BADINO, A. C.; CRUZ, A. J. G. Mixing design for enzymatic hydrolysis of sugarcane bagasse: methodology for selection of impeller configuration. Bioprocess and Biosystems Engineering, Berlin, v. 39, n. 2, p. 285-294, Feb. 2016.
metadata.artigo.dc.description.abstract: One of the major process bottlenecks for viable industrial production of second generation ethanol is related with technical–economic difficulties in the hydrolysis step. The development of a methodology to choose the best configuration of impellers towards improving mass transfer and hydrolysis yield together with a low power consumption is important to make the process cost-effective. In this work, four dual impeller configurations (DICs) were evaluated during hydrolysis of sugarcane bagasse (SCB) experiments in a stirred tank reactor (3 L). The systems tested were dual Rushton turbine impellers (DIC1), Rushton and elephant ear (down-pumping) turbines (DIC2), Rushton and elephant ear (up-pumping) turbines (DIC3), and down-pumping and up-pumping elephant ear turbines (DIC4). The experiments were conducted during 96 h, using 10 % (m/v) SCB, pH 4.8, 50 °C, 10 FPU/gbiomass, 470 rpm. The mixing time was successfully used as the characteristic parameter to select the best impeller configuration. Rheological parameters were determined using a rotational rheometer, and the power consumptions of the four DICs were on-line measured with a dynamometer. The values obtained for the energetic efficiency (the ratio between the cellulose to glucose conversion and the total energy) showed that the proposed methodology was successful in choosing a suitable configuration of impellers, wherein the DIC4 obtained approximately three times higher energetic efficiency than DIC1. Furthermore a scale-up protocol (factor scale-up 1000) for the enzymatic hydrolysis reactor was proposed.
metadata.artigo.dc.language: en_US
Appears in Collections:DEG - Artigos publicados em periódicos

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