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Process design and economics of on-site cellulase production on various carbon sources in a softwood-based ethanol plant.

Barta, Zsolt ; Kovacs, Krisztina LU ; Reczey, Katalin and Zacchi, Guido LU (2010) In Enzyme Research
Abstract
On-site cellulase enzyme fermentation in a softwood-to-ethanol process, based on S -catalysed steam pretreatment followed by simultaneous saccharification and fermentation, was investigated from a techno-economic aspect using Aspen Plus and Aspen Icarus Process Evaluator softwares. The effect of varying the carbon source of enzyme fermentation, at constant protein and mycelium yields, was monitored through the whole process. Enzyme production step decreased the overall ethanol yield (270 L/dry tonne of raw material in the case of purchased enzymes) by 5–16 L/tonne. Capital cost was found to be the main cost contributor to enzyme fermentation, constituting to 60–78% of the enzyme production cost, which was in the range of 0.42–0.53 SEK/L... (More)
On-site cellulase enzyme fermentation in a softwood-to-ethanol process, based on S -catalysed steam pretreatment followed by simultaneous saccharification and fermentation, was investigated from a techno-economic aspect using Aspen Plus and Aspen Icarus Process Evaluator softwares. The effect of varying the carbon source of enzyme fermentation, at constant protein and mycelium yields, was monitored through the whole process. Enzyme production step decreased the overall ethanol yield (270 L/dry tonne of raw material in the case of purchased enzymes) by 5–16 L/tonne. Capital cost was found to be the main cost contributor to enzyme fermentation, constituting to 60–78% of the enzyme production cost, which was in the range of 0.42–0.53 SEK/L ethanol. The lowest minimum ethanol selling prices (4.71 and 4.82 SEK/L) were obtained in those scenarios, where pretreated liquid fraction supplemented with molasses was used as carbon source. In some scenarios, on-site enzyme fermentation was found to be a feasible alternative. (Less)
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organization
publishing date
type
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publication status
published
subject
in
Enzyme Research
pages
8 pages
external identifiers
  • scopus:77957327272
DOI
10.4061/2010/734182
language
English
LU publication?
yes
id
b419ecd1-620b-4e3e-9fe4-5555985a139a
date added to LUP
2019-04-26 09:58:18
date last changed
2023-12-17 14:46:36
@article{b419ecd1-620b-4e3e-9fe4-5555985a139a,
  abstract     = {{On-site cellulase enzyme fermentation in a softwood-to-ethanol process, based on S -catalysed steam pretreatment followed by simultaneous saccharification and fermentation, was investigated from a techno-economic aspect using Aspen Plus and Aspen Icarus Process Evaluator softwares. The effect of varying the carbon source of enzyme fermentation, at constant protein and mycelium yields, was monitored through the whole process. Enzyme production step decreased the overall ethanol yield (270 L/dry tonne of raw material in the case of purchased enzymes) by 5–16 L/tonne. Capital cost was found to be the main cost contributor to enzyme fermentation, constituting to 60–78% of the enzyme production cost, which was in the range of 0.42–0.53 SEK/L ethanol. The lowest minimum ethanol selling prices (4.71 and 4.82 SEK/L) were obtained in those scenarios, where pretreated liquid fraction supplemented with molasses was used as carbon source. In some scenarios, on-site enzyme fermentation was found to be a feasible alternative.}},
  author       = {{Barta, Zsolt and Kovacs, Krisztina and Reczey, Katalin and Zacchi, Guido}},
  language     = {{eng}},
  series       = {{Enzyme Research}},
  title        = {{Process design and economics of on-site cellulase production on various carbon sources in a softwood-based ethanol plant.}},
  url          = {{http://dx.doi.org/10.4061/2010/734182}},
  doi          = {{10.4061/2010/734182}},
  year         = {{2010}},
}