Fed-batch hydrolysate addition and cell separation by settling in high cell density lignocellulosic ethanol fermentations on AFEX™ corn stover in the Rapid Bioconversion with Integrated recycling Technology process.
J Ind Microbiol Biotechnol
; 44(9): 1261-1272, 2017 Sep.
Article
en En
| MEDLINE
| ID: mdl-28536841
ABSTRACT
The Rapid Bioconversion with Integrated recycling Technology (RaBIT) process uses enzyme and yeast recycling to improve cellulosic ethanol production economics. The previous versions of the RaBIT process exhibited decreased xylose consumption using cell recycle for a variety of different micro-organisms. Process changes were tested in an attempt to eliminate the xylose consumption decrease. Three different RaBIT process changes were evaluated in this work including (1) shortening the fermentation time, (2) fed-batch hydrolysate addition, and (3) selective cell recycling using a settling method. Shorting the RaBIT fermentation process to 11 h and introducing fed-batch hydrolysate addition eliminated any xylose consumption decrease over ten fermentation cycles; otherwise, decreased xylose consumption was apparent by the third cell recycle event. However, partial removal of yeast cells during recycle was not economical when compared to recycling all yeast cells.
Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Saccharomyces cerevisiae
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Separación Celular
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Zea mays
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Etanol
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Fermentación
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Técnicas de Cultivo Celular por Lotes
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Lignina
Idioma:
En
Revista:
J Ind Microbiol Biotechnol
Asunto de la revista:
BIOTECNOLOGIA
/
MICROBIOLOGIA
Año:
2017
Tipo del documento:
Article
País de afiliación:
Estados Unidos