ENHANCE MENT OF EFFICIENCY OF ETHANOL PRODUCTION FROM JERUSALEM ARTICHOKE
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ENHANCEMENT OF EFFICIENCY OF ETHANOL PRODUCTION FROM JERUSALEM ARTICHOKE
Quang D. Nguyen, Kálmán Dénes, Csilla Farkas, Ágoston Hoschke, Judit M. Rezessy-SzabóThe 2nd International Symposium „Vera Johanides“ 2013
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Production of bioethanol in EU-27 - 2009(million liters)
Source: www.biofuels-platform.ch
Welcome Croatia to be in this map (EU-28)! On the 3rd International Symposium „Vera Johanides“ in 2015 – Biotechnology and Forestry Complex in Croatia?
Total: 3703
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Productivity of ethanol using different raw materials
Plant Main carbohydrate Productivity (l/ha)
Sugarcane saccharose 8000
Sugar beet saccharose 3300Jerusalem artichoke
inulin 4200
corn starch 2100potato starch 1900wheat starch 1800
wood cellulose/lignocellulose ?????
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Potential of JA-based bioethanol production
Jerusalem artichoke is easy to cultivate Relatively high production yields: 16–20
t/ha (even 20-80 t/ha) for tubers, and 18–28 t/ha green weight for foliage
High carbohydrate content: 15-20 % mainly inulin and fructo-oligosaccharides
Cultivate yearly Can be harvested like potato
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Problems addressedSaccharomyces cerevisiae strain
does not exhibit so high inulinase activity
Treatment: acidic or enzymaticExogenous enzyme preparationLow efficiency of bioconversion (60-
70 %)
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ObjectivesTechnological development for
enhancement of efficiency of ethanol production using
Jerusalem artichoke as raw material
Inoculation techniqueSimultan saccharification and fermentationSemi-continuous fermentation technology
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Development of inoculation techniqueEffects of various inoculation
techniques were investigated
Best oneon initial day 2/3 amount of inoculum (cell number) and on second day: 1/3 amount
Efficiency of bioconversion: 90 %
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SSF vs. Mixed Culture Fermentation
0 1 2 3 4 5 6 70.0
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Saccharomyces cerevisiae+ inulinase
Total carbohydrates Sugars with higher DPSaccharose Fermentable sugarsEthanol
Fermentation time (day)
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Etha
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0 1 2 3 4 5 6 70.0
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Mixed cultures (S. cerevisiae + Kl. marxianus)
Total carbohydrates Sugars with higher DPSaccharose Fermentable sugarsEthanol
Fermentation times (day)
Car
bohy
drat
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w/v
%)
Etha
nol c
once
ntra
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Efficiency of bioconverion: 85-88 %
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Semi-continuous technology
0.00 4.00 8.00 12.00 16.00 20.00 24.00 28.00 32.00 36.00 40.00 44.000
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Carbohydrates Ethanol
Fermentation time(days)
Etha
nol c
once
ntra
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Carb
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s (w
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Fresh mash
Harvested
Fresh mixed culture
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ConclusionThe use of mixed culture in combination with semi-continuous fermentation technology definetely increases in the productivity, thus it is very promising for development of technology for production of bioethanol based on Jerusalem artichoke as raw material
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AcknowledgementThis work was supported by
Hungarian Development Agency through Project number TÁMOP-4.2.1./B-09/1-KMR-2010-0005 and TECH_09-A3-2009-0194, as well as Hungarian Academy of Science through Bolyai János Research Grant
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Thank you for your kind attention!