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Cost Analysis of Ethanol Production from Willow Using Recombinant Escherichia coli
Abstract
This study comprises a technical and economic analysis of the production of fuel ethanol by fermentation of a pentose‐rich hydrolysate with recombinant Escherichia coli, strain KO11. Hydrolysate from steam‐pretreated willow was used as raw material in calculations regarding the fermentation. The calculations were based on a feed capacity of 10 metric tons of dry willow per hour to the pretreatment stage, providing 35 metric tons of hydrolysate per hour, consisting of 45 g of sugars/L, to the pentose fermentation plant. A detoxification step was included, since the hydrolysate has been shown to have an inhibitory effect on the E. coli KO11. The technical data used in the calculations were based on a kinetic fermentation model, which was developed from laboratory‐scale experiments in a previous study. The economic analysis predicted an ethanol production cost of 48¢/L in the pentose fermentation plant, indicating potentially good economy. The detoxification cost constitutes 22% of this cost. Sensitivity analyses revealed that if the concentration of sugars in the feed to the fermentation was decreased by 40% to 27 g/L, the ethanol production cost was increased to 54 ¢/L. The production cost was increased to 50 ¢/L ethanol if the cell mass was recirculated to the fermentation stage 5 times instead of 20.
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Metadata
- Authors
- Sivers, M. V., Zacchi, G., Olsson, L., & Hahn‐Hügerdal, B.
- Venue
- Biotechnology Progress
- Publisher
- Wiley
- Published
- 1994-09
- Volume
- 10
- Issue
- 5
- Pages
- 555-560
- ISSN
- 1520-6033 (ISSN-L)
- 8756-7938
- OpenAlex
- W2033932941
- Cited by
- 173
- References
- 0
- FWCI
- 9.77
- Type
- journal article
- Language
- en
- Open access
- closed
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