Influence of thermal pretreatment on the biochemical methane potential of wheat straw

被引：95

作者：

Ferreira, L. C. ^{[1
]}

Donoso-Bravo, A. ^{[2
]}

Nilsen, P. J. ^{[3
]}

Fdz-Polanco, F. ^{[1
]}

Perez-Elvira, S. I. ^{[1
]}

机构：

[1] Univ Valladolid, Dept Chem Engn & Environm Technol, E-47011 Valladolid, Spain

[2] Pontificia Univ Catolica Valparaiso, Escuela Ingn Bioquim, Valparaiso, Chile

[3] Camni AS, N-1383 Asker, Norway

来源：

BIORESOURCE TECHNOLOGY | 2013年 / 143卷

关键词：

Biochemical methane potential; Thermal hydrolysis; Pre-treatment; Mathematical modeling; Wheat straw; STEAM EXPLOSION CONDITIONS; ANAEROBIC-DIGESTION; BIOGAS PRODUCTION; BIOETHANOL PRODUCTION; ETHANOL-PRODUCTION; CORN STOVER; WASTE; SSF; SACCHARIFICATION; HYDROLYSIS;

D O I：

10.1016/j.biortech.2013.05.065

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The biochemical methane potential of steam exploded wheat straw was evaluated in a pilot plant under different temperature-time combinations. The optimum was obtained for 1 min and 220 degrees C thermal pretreatment (3.5 severity factor), resulting in a 20% increase in methane production respect non-treated straw. For more severe treatments the biodegradability decreased due to a possible formation of inhibitory compounds. The results of the tests were modeled with a first order equation to estimate the hydrolysis constant and biodegradability extent, and the influence of temperature and time on the kinetic parameters was obtained with a response surface study. The data processing confirmed the accuracy of the model and the optimum operation conditions, and demonstrated that the biomethanization of raw and pretreated wheat straw is limited by the hydrolysis, being the individual influence of temperature and time much more important than the interaction between them. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：251 / 257

页数：7

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