Data/hora: 23/06/2024 01:05:15

Biblioteca(s): | Embrapa Agroenergia.
Data corrente: | 04/10/2013
Data da última atualização: | 21/09/2017
Autoria: | CARVALHO, M. L.; ZUÑIGA, U. F. R.; SUAREZ, C. A. G.; GIORDANO, R. C.; GIORDANO, R. L. C.; RODRIGUES, D. de S.; JUNIOR, R. S.
Afiliação: | M. L. Carvalho, Universidade Federal de São Carlos; U. F. Rodríguez-Zúñiga, Universidade Federal de São Carlos; C. A. G. Suarez, Universidade Federal de São Carlos; R. C. Giordano, Universidade Federal de São Carlos; R. L. C. Giordano, Universidade Federal de São Carlos; DASCIANA DE SOUSA RODRIGUES, CNPAE; R. Sousa Jr., Universidade Federal de São Carlos.
Título: | Kinetic study of the enzymatic hydrolysis of sugarcane bagasse.
Ano de publicação: | 2013
Fonte/Imprenta: | Brazilian Journal of Chemical Engineering, v. 30, n. 3, p. 437-447, 2013.
DOI: | 10.1590/S0104-66322013000300002
Idioma: | Inglês
Conteúdo: | This work presents a kinetic study of the enzymatic hydrolysis of three cellulosic substrates: filter paper (FP), used as a low recalcitrance substrate model; steam exploded sugarcane bagasse (SB); and weak acid pretreated SB (1:20 dry bagasse:H2SO4 solution 1% w/w), the last two delignified with 4% NaOH (w/w). The influence of substrate concentration was assessed in hydrolysis experiments in a shaker, using Accellerase® 1500, at pH 4.8, in 50 mM sodium citrate buffer. Cellulose loads (weightsubstrate/weighttotal) were changed between 0.5%-13% (for FP) and 0.99%-9.09% (for SB). For FP and low loads of steam exploded SB, it was possible to fit pseudo-homogeneous Michaelis-Menten models (with inhibition). For FP and higher loads of steam exploded SB, modified Michaelis-Menten models were fitted. Besides, it was observed that, after retuning of the model parameters, it is possible to apply a model fitted for one situation to a different case. Chrastil models were also fitted and they were the only feasible approach for the highly recalcitrant acid-treated SB.
Palavras-Chave: | Cellulose enzymatic hydrolysis; Kinetic study.
Thesaurus Nal: | sugarcane bagasse.
Categoria do assunto: | --
Registro original: | Embrapa Agroenergia (CNPAE)
Exemplares: | CNPAE - (2258-1) - UPC - AP - DD -  -  -  - DIS