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