Recycling of process streams in ethanol production from softwoods based on enzymatic hydrolysis
(1998) In Applied Biochemistry and Biotechnology 70-2. p.697-708- Abstract
- In ethanol production from lignocellulose by enzymatic hydrolysis and fermentation, it is desirable to minimize addition of fresh-water and waste-water streams, which leads to an accumulation of substances in the process. This study shows that the amount of fresh water used and the amount of waste water thereby produced in the production of fuel ethanol from softwood, can be reduced to a large extent by recycling of either the stillage stream or part of the liquid stream from the fermenter. A reduction in fresh-water demand of more than 50%, from 3 kg/kg dry raw material to 1.5 kg/kg dry raw material was obtained without any negative effects on either hydrolysis or fermentation. A further decrease in the amount of fresh water, to... (More)
- In ethanol production from lignocellulose by enzymatic hydrolysis and fermentation, it is desirable to minimize addition of fresh-water and waste-water streams, which leads to an accumulation of substances in the process. This study shows that the amount of fresh water used and the amount of waste water thereby produced in the production of fuel ethanol from softwood, can be reduced to a large extent by recycling of either the stillage stream or part of the liquid stream from the fermenter. A reduction in fresh-water demand of more than 50%, from 3 kg/kg dry raw material to 1.5 kg/kg dry raw material was obtained without any negative effects on either hydrolysis or fermentation. A further decrease in the amount of fresh water, to one-fourth of what was used without recycling of process streams, resulted in a considerable decrease in the ethanol productivity and a slight decrease in the ethanol yield. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3911451
- author
- Stenberg, K ; Tengborg, C ; Galbe, Mats LU ; Zacchi, Guido LU ; Palmqvist, E and Hahn-Hägerdal, Bärbel LU
- organization
- publishing date
- 1998
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- ethanol production, recycling, softwood, inhibition, steam pretreatment
- in
- Applied Biochemistry and Biotechnology
- volume
- 70-2
- pages
- 697 - 708
- publisher
- Humana Press
- external identifiers
-
- wos:000073769000065
- pmid:18576034
- scopus:0031829859
- ISSN
- 1559-0291
- DOI
- 10.1007/BF02920181
- language
- English
- LU publication?
- yes
- id
- dd12aa47-e8aa-43c2-89ab-8cf21c4b811f (old id 3911451)
- date added to LUP
- 2016-04-01 12:20:35
- date last changed
- 2023-11-11 21:39:33
@article{dd12aa47-e8aa-43c2-89ab-8cf21c4b811f,
abstract = {{In ethanol production from lignocellulose by enzymatic hydrolysis and fermentation, it is desirable to minimize addition of fresh-water and waste-water streams, which leads to an accumulation of substances in the process. This study shows that the amount of fresh water used and the amount of waste water thereby produced in the production of fuel ethanol from softwood, can be reduced to a large extent by recycling of either the stillage stream or part of the liquid stream from the fermenter. A reduction in fresh-water demand of more than 50%, from 3 kg/kg dry raw material to 1.5 kg/kg dry raw material was obtained without any negative effects on either hydrolysis or fermentation. A further decrease in the amount of fresh water, to one-fourth of what was used without recycling of process streams, resulted in a considerable decrease in the ethanol productivity and a slight decrease in the ethanol yield.}},
author = {{Stenberg, K and Tengborg, C and Galbe, Mats and Zacchi, Guido and Palmqvist, E and Hahn-Hägerdal, Bärbel}},
issn = {{1559-0291}},
keywords = {{ethanol production; recycling; softwood; inhibition; steam pretreatment}},
language = {{eng}},
pages = {{697--708}},
publisher = {{Humana Press}},
series = {{Applied Biochemistry and Biotechnology}},
title = {{Recycling of process streams in ethanol production from softwoods based on enzymatic hydrolysis}},
url = {{http://dx.doi.org/10.1007/BF02920181}},
doi = {{10.1007/BF02920181}},
volume = {{70-2}},
year = {{1998}},
}