Single-step bioconversion of starch to bioethanol by the coculture of ragi tapai and saccharomyces cerevisiae
The objective of this preliminary experiment was to test the hypothesis that coculturing commercialised ragi tapai with S. cerevisiae might have improved the ethanol production and reduce the accumulation of inhibitory concentration of reducing sugar and this would enhance the amylolytic activity....
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The Italian Association of Chemical Engineering
2009
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| Online Access: | http://irep.iium.edu.my/5001/ http://irep.iium.edu.my/5001/ http://irep.iium.edu.my/5001/ http://irep.iium.edu.my/5001/1/Chem_Eng_Transaction_%28Azlin-2009%29.pdf |
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eprints |
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iium-50012017-06-14T01:19:40Z http://irep.iium.edu.my/5001/ Single-step bioconversion of starch to bioethanol by the coculture of ragi tapai and saccharomyces cerevisiae Azmi, Azlin Suhaida Hasan, Masitah Mel, Maizirwan Ngoh, Cheng TP155 Chemical engineering TP248.13 Biotechnology TP315 Fuel TP500 Fermentation industries. Beverages. Alcohol The objective of this preliminary experiment was to test the hypothesis that coculturing commercialised ragi tapai with S. cerevisiae might have improved the ethanol production and reduce the accumulation of inhibitory concentration of reducing sugar and this would enhance the amylolytic activity. Co culture of a commercialised ragi tapai with S cerevisiae using unhydrolysed raw starch in single step-fermentation produced a high ethanol concentration. A 35.26 giL of ethanol was produced when the starch was inoculated with ragi tapai and cocultured it with Scerevisiae 1 h later. This was 48% higher than the yield obtained when the starch was inoculated with ragi tapai only (23.79 giL). The glucose concentration was maintained at low concentration in the coculture medium compared to the medium with ragi tapai only. However, stachyose concentration profile was higher in cocultured medium as compared to the one with ragi tapai only. In conclusion, coculture ragi tapai with S cerevisiae enhanced the ethanol production and prevented the inhibitory effect of reducing sugars on amylase activity. The Italian Association of Chemical Engineering 2009 Article PeerReviewed application/pdf en http://irep.iium.edu.my/5001/1/Chem_Eng_Transaction_%28Azlin-2009%29.pdf Azmi, Azlin Suhaida and Hasan, Masitah and Mel, Maizirwan and Ngoh, Cheng (2009) Single-step bioconversion of starch to bioethanol by the coculture of ragi tapai and saccharomyces cerevisiae. Chemical Engineering Transactions, 18. pp. 557-562. ISSN 1974-9791 http://www.aidic.it/cet/09/18/programma.html 10.33031CET0918090 |
| repository_type |
Digital Repository |
| institution_category |
Local University |
| institution |
International Islamic University Malaysia |
| building |
IIUM Repository |
| collection |
Online Access |
| language |
English |
| topic |
TP155 Chemical engineering TP248.13 Biotechnology TP315 Fuel TP500 Fermentation industries. Beverages. Alcohol |
| spellingShingle |
TP155 Chemical engineering TP248.13 Biotechnology TP315 Fuel TP500 Fermentation industries. Beverages. Alcohol Azmi, Azlin Suhaida Hasan, Masitah Mel, Maizirwan Ngoh, Cheng Single-step bioconversion of starch to bioethanol by the coculture of ragi tapai and saccharomyces cerevisiae |
| description |
The objective of this preliminary experiment was to test the hypothesis that coculturing commercialised ragi tapai with S. cerevisiae might have improved the ethanol
production and reduce the accumulation of inhibitory concentration of reducing sugar and this would enhance the amylolytic activity. Co culture of a commercialised ragi
tapai with S cerevisiae using unhydrolysed raw starch in single step-fermentation produced a high ethanol concentration. A 35.26 giL of ethanol was produced when the
starch was inoculated with ragi tapai and cocultured it with Scerevisiae 1 h later. This was 48% higher than the yield obtained when the starch was inoculated with ragi tapai only (23.79 giL). The glucose concentration was maintained at low concentration in the coculture medium compared to the medium with ragi tapai only. However, stachyose concentration profile was higher in cocultured medium as compared to the one with ragi tapai only. In conclusion, coculture ragi tapai with S cerevisiae enhanced the ethanol production and prevented the inhibitory effect of reducing sugars on amylase activity. |
| format |
Article |
| author |
Azmi, Azlin Suhaida Hasan, Masitah Mel, Maizirwan Ngoh, Cheng |
| author_facet |
Azmi, Azlin Suhaida Hasan, Masitah Mel, Maizirwan Ngoh, Cheng |
| author_sort |
Azmi, Azlin Suhaida |
| title |
Single-step bioconversion of starch to bioethanol by the
coculture of ragi tapai and saccharomyces cerevisiae |
| title_short |
Single-step bioconversion of starch to bioethanol by the
coculture of ragi tapai and saccharomyces cerevisiae |
| title_full |
Single-step bioconversion of starch to bioethanol by the
coculture of ragi tapai and saccharomyces cerevisiae |
| title_fullStr |
Single-step bioconversion of starch to bioethanol by the
coculture of ragi tapai and saccharomyces cerevisiae |
| title_full_unstemmed |
Single-step bioconversion of starch to bioethanol by the
coculture of ragi tapai and saccharomyces cerevisiae |
| title_sort |
single-step bioconversion of starch to bioethanol by the
coculture of ragi tapai and saccharomyces cerevisiae |
| publisher |
The Italian Association of Chemical Engineering |
| publishDate |
2009 |
| url |
http://irep.iium.edu.my/5001/ http://irep.iium.edu.my/5001/ http://irep.iium.edu.my/5001/ http://irep.iium.edu.my/5001/1/Chem_Eng_Transaction_%28Azlin-2009%29.pdf |
| first_indexed |
2023-09-18T20:13:27Z |
| last_indexed |
2023-09-18T20:13:27Z |
| _version_ |
1777407630925365248 |