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Effect of reduction in yeast and enzyme concentrations in a simultaneous-saccharification-and-fermentation-based bioethanol process - Technical and economic evaluation

Wingren, Anders LU ; Galbe, Mats LU ; Roslander, Christian LU ; Rudolf, Andreas LU and Zacchi, Guido LU (2005) In Applied Biochemistry and Biotechnology 122(1-3). p.485-499
Abstract
The ethanol production cost in a simultaneous saccharification and fermentation-based bioethanol process is influenced by the requirements for yeast production and for enzymes. The main objective of this study was to evaluate-technically and economically-the influence of these two factors on the production cost. Abase case with 5 g/L of baker's yeast and an initial concentration of water-insoluble solids of 5% resulted in an experimental yield of 85%. When these data were implemented in Aspen Plus, yeast was assumed to be produced from sugars in the hydrolysate, reducing the overall ethanol yield to 69%. The ethanol production cost was 4.80 SEK/L (2.34 US$/gal). When adapted yeast was used at 2 g/L, an experimental yield of 74% was... (More)
The ethanol production cost in a simultaneous saccharification and fermentation-based bioethanol process is influenced by the requirements for yeast production and for enzymes. The main objective of this study was to evaluate-technically and economically-the influence of these two factors on the production cost. Abase case with 5 g/L of baker's yeast and an initial concentration of water-insoluble solids of 5% resulted in an experimental yield of 85%. When these data were implemented in Aspen Plus, yeast was assumed to be produced from sugars in the hydrolysate, reducing the overall ethanol yield to 69%. The ethanol production cost was 4.80 SEK/L (2.34 US$/gal). When adapted yeast was used at 2 g/L, an experimental yield of 74% was achieved and the estimated ethanol production cost was the same as in the base case. A 50% reduction in enzyme addition resulted in an increased production cost, to 5.06 SEK/L (2.47 US$/gal) owing to reduced ethanol yield. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Biochemistry and Biotechnology
volume
122
issue
1-3
pages
485 - 499
publisher
Humana Press
external identifiers
  • wos:000229975200044
  • scopus:18844409134
ISSN
1559-0291
language
English
LU publication?
yes
id
afeda86d-8b06-46f8-89f6-fac0e39c1271 (old id 151660)
alternative location
http://www.ingentaconnect.com/content/hum/abab
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=15920258&query_hl=2&itool=pubmed_docsum
date added to LUP
2016-04-01 11:38:03
date last changed
2023-11-10 18:54:19
@article{afeda86d-8b06-46f8-89f6-fac0e39c1271,
  abstract     = {{The ethanol production cost in a simultaneous saccharification and fermentation-based bioethanol process is influenced by the requirements for yeast production and for enzymes. The main objective of this study was to evaluate-technically and economically-the influence of these two factors on the production cost. Abase case with 5 g/L of baker's yeast and an initial concentration of water-insoluble solids of 5% resulted in an experimental yield of 85%. When these data were implemented in Aspen Plus, yeast was assumed to be produced from sugars in the hydrolysate, reducing the overall ethanol yield to 69%. The ethanol production cost was 4.80 SEK/L (2.34 US$/gal). When adapted yeast was used at 2 g/L, an experimental yield of 74% was achieved and the estimated ethanol production cost was the same as in the base case. A 50% reduction in enzyme addition resulted in an increased production cost, to 5.06 SEK/L (2.47 US$/gal) owing to reduced ethanol yield.}},
  author       = {{Wingren, Anders and Galbe, Mats and Roslander, Christian and Rudolf, Andreas and Zacchi, Guido}},
  issn         = {{1559-0291}},
  language     = {{eng}},
  number       = {{1-3}},
  pages        = {{485--499}},
  publisher    = {{Humana Press}},
  series       = {{Applied Biochemistry and Biotechnology}},
  title        = {{Effect of reduction in yeast and enzyme concentrations in a simultaneous-saccharification-and-fermentation-based bioethanol process - Technical and economic evaluation}},
  url          = {{http://www.ingentaconnect.com/content/hum/abab}},
  volume       = {{122}},
  year         = {{2005}},
}