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231223s2010 xx |||||o 00| ||eng c |
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|a 10.1177/0734242X09335701
|2 doi
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|a pubmed25n0638.xml
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|a (DE-627)NLM191303828
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|a (NLM)19748936
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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1 |
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|a Castro, G A
|e verfasserin
|4 aut
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|a Solvent extraction of organic acids from stillage for its re-use in ethanol production process
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|c 2010
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 04.08.2010
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|a Date Revised 16.11.2017
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Stillage re-use in the fermentation stage in ethanol production is a technique used for the reduction of water and fermentation nutrients consumption. However, the inhibitory effect on yeast growth of the by-products and feed components that remains in stillage increases with re-use and reduces the number of possible recycles. Several methods such as ultrafiltration, electrodialysis and advanced oxidation processes have been used in stillage treatment prior its re-use in the fermentation stage. Nevertheless, few studies evaluating the effect of solvent extraction as a stillage treatment option have been performed. In this work, the inhibitory effect of serial stillage recycling over ethanol and biomass production was determined, using acetic acid as a monitoring compound during the fermentation and solvent extraction process. Raw palm oil methyl ester showed the highest acetic acid extraction from the aqueous phase, presenting a distribution coefficient of 3.10 for a 1:1 aqueous phase mixture:solvent ratio. Re-using stillage without treatment allowed up to three recycles with an ethanol production of 53.7 +/- 2.0 g L(-1), which was reduced 25% in the fifth recycle. Alternatively, treated stillage allowed up to five recycles with an ethanol final concentration of 54.7 +/- 1.3 g L(- 1). These results show that reduction of acetic acid concentration by an extraction process with raw palm oil methyl ester before re-using stillage improves the number of recycles without a major effect on ethanol production. The proposed process generates a palm oil methyl ester that contains organic acids, among other by-products, that could be used for product recovery and as an alternative fuel
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|a Journal Article
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|a Acids
|2 NLM
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|a Organic Chemicals
|2 NLM
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|a Plant Oils
|2 NLM
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|a Solvents
|2 NLM
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| 650 |
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7 |
|a Ethanol
|2 NLM
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| 650 |
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7 |
|a 3K9958V90M
|2 NLM
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| 650 |
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|a Palm Oil
|2 NLM
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| 650 |
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7 |
|a 5QUO05548Z
|2 NLM
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| 650 |
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7 |
|a Acetic Acid
|2 NLM
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| 650 |
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7 |
|a Q40Q9N063P
|2 NLM
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| 700 |
1 |
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|a Caicedo, L A
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Alméciga-Díaz, C J
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Sanchez, O F
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA
|d 1991
|g 28(2010), 6 vom: 01. Juni, Seite 533-8
|w (DE-627)NLM098164791
|x 1096-3669
|7 nnns
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| 773 |
1 |
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|g volume:28
|g year:2010
|g number:6
|g day:01
|g month:06
|g pages:533-8
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|u http://dx.doi.org/10.1177/0734242X09335701
|3 Volltext
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