Fungal protein and ethanol from lignocelluloses using Rhizopus pellets under simultaneous saccharification, filtration and fermentation (SSFF)
The economic viability of the 2nd generation bioethanol production process cannot rely on a single product but on a biorefinery built around it. In this work, ethanol and fungal biomass (animal feed) were produced from acid-pretreated wheat straw slurry under an innovative simultaneous saccharificat...
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| Format: | Article |
| Language: | English |
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Alpha Creation Enterprise
2016-03-01
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| Series: | Biofuel Research Journal |
| Subjects: | |
| Online Access: | http://www.biofueljournal.com/article_12528_45372352f012169e6a847efd412b97be.pdf |
| _version_ | 1797243588998856704 |
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| author | Somayeh FazeliNejad Jorge A. Ferreira Tomas Brandberg Patrik R. Lennartsson Mohammad J. Taherzadeh |
| author_facet | Somayeh FazeliNejad Jorge A. Ferreira Tomas Brandberg Patrik R. Lennartsson Mohammad J. Taherzadeh |
| author_sort | Somayeh FazeliNejad |
| collection | DOAJ |
| description | The economic viability of the 2nd generation bioethanol production process cannot rely on a single product but on a biorefinery built around it. In this work, ethanol and fungal biomass (animal feed) were produced from acid-pretreated wheat straw slurry under an innovative simultaneous saccharification, fermentation, and filtration (SSFF) strategy. A membrane unit separated the solids from the liquid and the latter was converted to biomass or to both biomass and ethanol in the fermentation reactor containing Rhizopus sp. pellets. Biomass yields of up to 0.34 g/g based on the consumed monomeric sugars and acetic acid were achieved. A surplus of glucose in the feed resulted in ethanol production and reduced the biomass yield, whereas limiting glucose concentrations resulted in higher consumption of xylose and acetic acid. The specific growth rate, in the range of 0.013-0.015/h, did not appear to be influenced by the composition of the carbon source. Under anaerobic conditions, an ethanol yield of 0.40 g/g was obtained. The present strategy benefits from the easier separation of the biomass from the medium and the fungus ability to assimilate carbon residuals in comparison with when yeast is used. More specifically, it allows in-situ separation of insoluble solids leading to the production of pure fungal biomass as a value-added product. |
| first_indexed | 2024-04-24T18:57:31Z |
| format | Article |
| id | doaj.art-8ce9acab97ab466abe53ca6f1b5f91d8 |
| institution | Directory Open Access Journal |
| issn | 2292-8782 2292-8782 |
| language | English |
| last_indexed | 2024-04-24T18:57:31Z |
| publishDate | 2016-03-01 |
| publisher | Alpha Creation Enterprise |
| record_format | Article |
| series | Biofuel Research Journal |
| spelling | doaj.art-8ce9acab97ab466abe53ca6f1b5f91d82024-03-26T15:13:21ZengAlpha Creation EnterpriseBiofuel Research Journal2292-87822292-87822016-03-013137237810.18331/BRJ2016.3.1.712528Fungal protein and ethanol from lignocelluloses using Rhizopus pellets under simultaneous saccharification, filtration and fermentation (SSFF)Somayeh FazeliNejad0Jorge A. Ferreira1Tomas Brandberg2Patrik R. Lennartsson3Mohammad J. Taherzadeh4Swedish Centre for Resource Recovery, University of Borås, SE 501 90, Borås, SwedenSwedish Centre for Resource Recovery, University of Borås, SE 501 90, Borås, SwedenSwedish Centre for Resource Recovery, University of Borås, SE 501 90, Borås, SwedenSwedish Centre for Resource Recovery, University of Borås, SE 501 90, Borås, SwedenSwedish Centre for Resource Recovery, University of Borås, SE 501 90, Borås, SwedenThe economic viability of the 2nd generation bioethanol production process cannot rely on a single product but on a biorefinery built around it. In this work, ethanol and fungal biomass (animal feed) were produced from acid-pretreated wheat straw slurry under an innovative simultaneous saccharification, fermentation, and filtration (SSFF) strategy. A membrane unit separated the solids from the liquid and the latter was converted to biomass or to both biomass and ethanol in the fermentation reactor containing Rhizopus sp. pellets. Biomass yields of up to 0.34 g/g based on the consumed monomeric sugars and acetic acid were achieved. A surplus of glucose in the feed resulted in ethanol production and reduced the biomass yield, whereas limiting glucose concentrations resulted in higher consumption of xylose and acetic acid. The specific growth rate, in the range of 0.013-0.015/h, did not appear to be influenced by the composition of the carbon source. Under anaerobic conditions, an ethanol yield of 0.40 g/g was obtained. The present strategy benefits from the easier separation of the biomass from the medium and the fungus ability to assimilate carbon residuals in comparison with when yeast is used. More specifically, it allows in-situ separation of insoluble solids leading to the production of pure fungal biomass as a value-added product.http://www.biofueljournal.com/article_12528_45372352f012169e6a847efd412b97be.pdfCellulosic ethanolAnimal feedRhizopus spSSFFWheat Straw |
| spellingShingle | Somayeh FazeliNejad Jorge A. Ferreira Tomas Brandberg Patrik R. Lennartsson Mohammad J. Taherzadeh Fungal protein and ethanol from lignocelluloses using Rhizopus pellets under simultaneous saccharification, filtration and fermentation (SSFF) Biofuel Research Journal Cellulosic ethanol Animal feed Rhizopus sp SSFF Wheat Straw |
| title | Fungal protein and ethanol from lignocelluloses using Rhizopus pellets under simultaneous saccharification, filtration and fermentation (SSFF) |
| title_full | Fungal protein and ethanol from lignocelluloses using Rhizopus pellets under simultaneous saccharification, filtration and fermentation (SSFF) |
| title_fullStr | Fungal protein and ethanol from lignocelluloses using Rhizopus pellets under simultaneous saccharification, filtration and fermentation (SSFF) |
| title_full_unstemmed | Fungal protein and ethanol from lignocelluloses using Rhizopus pellets under simultaneous saccharification, filtration and fermentation (SSFF) |
| title_short | Fungal protein and ethanol from lignocelluloses using Rhizopus pellets under simultaneous saccharification, filtration and fermentation (SSFF) |
| title_sort | fungal protein and ethanol from lignocelluloses using rhizopus pellets under simultaneous saccharification filtration and fermentation ssff |
| topic | Cellulosic ethanol Animal feed Rhizopus sp SSFF Wheat Straw |
| url | http://www.biofueljournal.com/article_12528_45372352f012169e6a847efd412b97be.pdf |
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