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Theuretzbacher, F; Lizasoain, J; Lefever, C; Saylor, MK; Enguidanos, R; Weran, N; Gronauer, A; Bauer, A; .
(2015): Steam explosion pretreatment of wheat straw to improve methane yields: investigation of the degradation kinetics of structural compounds during anaerobic digestion.
Bioresour Technol. 2015; 179:299-305 FullText FullText_BOKU

Wheat straw can serve as a low-cost substrate for energy production without competing with food or feed production. This study investigated the effect of steam explosion pretreatment on the biological methane potential and the degradation kinetics of wheat straw during anaerobic digestion. It was observed that the biological methane potential of the non steam exploded, ground wheat straw (276 l(N) kg VS-1) did not significantly differ from the best steam explosion treated sample (286 l(N) kg VS-1) which was achieved at a pretreatment temperature of 140 degrees C and a retention time of 60 min. Nevertheless degradation speed was improved by the pretreatment. Furthermore it was observed that compounds resulting from chemical reactions during the pretreatment and classified as pseudo-lignin were also degraded during the anaerobic batch experiments. Based on the rumen simulation technique, a model was developed to characterise the degradation process. (C) 2014 Elsevier Ltd. All rights reserved.
Authors BOKU Wien:
Bauer Alexander
Gronauer Andreas
Lizasoain Arteaga Javier
Saylor Molly
Theuretzbacher Franz

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Degradation process

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