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Techno-economic evaluation of conditioning with sodium sulfite for bioethanol production from softwood
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen.
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2015 (Engelska)Ingår i: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 196, s. 129-135Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Conditioning with reducing agents allows alleviation of inhibition of biocatalytic processes by toxic by-products generated during biomass pretreatment, without necessitating the introduction of a separate process step. In this work, conditioning of steam-pretreated spruce with sodium sulfite made it possible to lower the yeast and enzyme dosages in simultaneous saccharification and fermentation (SSF) to 1 g/L and 5 FPU/g WIS, respectively. Techno-economic evaluation indicates that the cost of sodium sulfite can be offset by benefits resulting from a reduction of either the yeast load by 0.68 g/L or the enzyme load by 1 FPU/g WIS. As those thresholds were surpassed, inclusion of conditioning can be justified. Another potential benefit results from shortening the SSF time, which would allow reducing the bioreactor volume and result in capital savings. Sodium sulfite conditioning emerges as an opportunity to lower the financial uncertainty and compensate the overall investment risk for commercializing a softwood-to-ethanol process. (C) 2015 The Authors. Published by Elsevier Ltd.

Ort, förlag, år, upplaga, sidor
2015. Vol. 196, s. 129-135
Nyckelord [en]
Cellulosic ethanol, Conditioning, Sodium sulfite, Simultaneous saccharification and fermentation, chno-economic evaluation
Nationell ämneskategori
Biokemi och molekylärbiologi
Identifikatorer
URN: urn:nbn:se:umu:diva-109788DOI: 10.1016/j.biortech.2015.07.051ISI: 000361040500018PubMedID: 26232771OAI: oai:DiVA.org:umu-109788DiVA, id: diva2:859734
Tillgänglig från: 2015-10-08 Skapad: 2015-10-06 Senast uppdaterad: 2018-06-07Bibliografiskt granskad

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Cavka, AdnanMartin, CarlosJönsson, Leif J.

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