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Alkali pretreatment...
Alkali pretreatment of softwood spruce and hardwood birch by NaOH/thiourea, NaOH/urea, NaOH/urea/thiourea, and NaOH/PEG for improve of ethanol and biogas production
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Mohsenzadeh, A. (author)
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Jeihanipour, A. (author)
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- Karimi, K. (author)
- Högskolan i Borås,Institutionen Ingenjörshögskolan,Biotechnology
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- Taherzadeh, M.J. (author)
- Högskolan i Borås,Institutionen Ingenjörshögskolan,Biotechnology
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(creator_code:org_t)
- 2012-01-06
- 2012
- English.
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In: Journal of chemical technology and biotechnology (1986). - : John Wiley & Sons Ltd.. - 0268-2575 .- 1097-4660. ; 87:8, s. 1209-1214
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Alkali-dissolution pretreatment of softwood spruce and hardwood birch to improve ethanol and biogas production was investigated. The pretreatments were carried out at different temperatures between − 15 and 80 °C with NaOH/thiourea (7/5.5 wt%), NaOH/urea (7/12 wt%), NaOH/urea/thiourea (7/8/6.5 wt%), and NaOH/PEG (7/1 wt%) aqueous solutions. The pretreated materials were then subjected to enzymatic hydrolysis for 72 h. The pretreatments by NaOH/thiourea at − 15 °C improved the hydrolysis yields of spruce from 11.7% to 57% of theoretical yield, and for birch from 23.1% to 83% of theoretical yield. The enzymatic hydrolysis and fermentation of these pretreated materials by NaOH/thiourea with baker's yeast resulted in 54.0% of theoretical yield compared with 10.9% for untreated spruce and 80.9% of theoretical yield compared with 12.9% for untreated birch. Furthermore, anaerobic digestion of pretreated materials resulted in 0.36 L g−1 VS methane compared with 0.23 L g−1 VS for untreated birch, and 0.21 L g−1 VS compared with 0.03 L g−1 VS for untreated spruce.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Industriell bioteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Industrial Biotechnology (hsv//eng)
Keyword
- alkaline pretreatment
- spruce
- birch
- enzymatic hydrolysis
- bioethanol
- biogas
- Resource Recovery
- Resursåtervinning
- Resource Recovery
Publication and Content Type
- ref (subject category)
- art (subject category)
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