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  • Title: Pretreatment of whole-crop harvested, ensiled maize for ethanol production.
    Author: Thomsen MH, Holm-Nielsen JB, Oleskowicz-Popiel P, Thomsen AB.
    Journal: Appl Biochem Biotechnol; 2008 Mar; 148(1-3):23-33. PubMed ID: 18418738.
    Abstract:
    To have all-year-round available feedstock, whole-crop maize is harvested premature, when it still contains enough moisture for the anaerobic ensiling process. Silage preparation is a well-known procedure for preserving plant material. At first, this method was applied to obtain high-quality animal feed. However, it was found that such ensiled crops are very suitable for bioenergy production. Maize silage, which consists of hardly degradable lignocellulosic material, hemicellulosic material, and starch, was evaluated for its potential as a feedstock in the production of bioethanol. It was pretreated at low severity (185 degrees C, 15 min) giving very high glucan ( approximately 100%) and hemicellulose recoveries (<80%)-as well as very high ethanol yield in simultaneous saccharification and fermentation experiments (98% of the theoretical production based on available glucan in the medium). The theoretical ethanol production of maize silage pretreated at 185 degrees C for 15 min without oxygen or catalyst was 392 kg ethanol per ton of dry maize silage.
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