Cellulosic Bioethanol from Industrial <i>Eucalyptus globulus</i> Bark Residues Using Kraft Pulping as a Pretreatment
The pulp and paper industry faces an emerging challenge for valorising wastes and side-streams generated according to the biorefinery concept. <i>Eucalyptus globulus</i> bark, an abundant industrial residue in the Portuguese pulp and paper sector, has a high potential to be converted int...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/8/2185 |
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| author | Mariana S. T. Amândio Jorge M. S. Rocha Luísa S. Serafim Ana M. R. B. Xavier |
| author_facet | Mariana S. T. Amândio Jorge M. S. Rocha Luísa S. Serafim Ana M. R. B. Xavier |
| author_sort | Mariana S. T. Amândio |
| collection | DOAJ |
| description | The pulp and paper industry faces an emerging challenge for valorising wastes and side-streams generated according to the biorefinery concept. <i>Eucalyptus globulus</i> bark, an abundant industrial residue in the Portuguese pulp and paper sector, has a high potential to be converted into biobased products instead of being burned. This work aimed to evaluate the ethanol production from <i>E. globulus</i> bark previously submitted to kraft pulping through separate hydrolysis and fermentation (SHF) configuration. Fed-batch enzymatic hydrolysis provided a concentrated hydrolysate with 161.6 g·L<sup>−1</sup> of cellulosic sugars. <i>S. cerevisiae</i> and Ethanol Red<sup>®</sup> strains demonstrated a very good fermentation performance, despite a negligible xylose consumption. <i>S. passalidarum</i>, a yeast known for its capability to consume pentoses, was studied in a simultaneous co-culture with Ethanol Red<sup>®</sup>. However, bioethanol production was not improved. The best fermentation performance was achieved by Ethanol Red<sup>®</sup>, which provided a maximum ethanol concentration near 50 g·L<sup>−1</sup> and fermentation efficiency of 80%. Concluding, kraft pulp from <i>E. globulus</i> bark showed a high potential to be converted into cellulosic bioethanol, being susceptible to implementing an integrated biorefinery on the pulp and paper industrial plants. |
| first_indexed | 2024-03-10T12:20:23Z |
| format | Article |
| id | doaj.art-8425e8ac67fb4c6eace09ffb79b02ee5 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T12:20:23Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-8425e8ac67fb4c6eace09ffb79b02ee52023-11-21T15:31:37ZengMDPI AGEnergies1996-10732021-04-01148218510.3390/en14082185Cellulosic Bioethanol from Industrial <i>Eucalyptus globulus</i> Bark Residues Using Kraft Pulping as a PretreatmentMariana S. T. Amândio0Jorge M. S. Rocha1Luísa S. Serafim2Ana M. R. B. Xavier3Chemistry Department, CICECO—Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, PortugalCIEPQPF, Department of Chemical Engineering, Faculty of Sciences and Technology, University of Coimbra, 3030-790 Coimbra, PortugalChemistry Department, CICECO—Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, PortugalChemistry Department, CICECO—Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, PortugalThe pulp and paper industry faces an emerging challenge for valorising wastes and side-streams generated according to the biorefinery concept. <i>Eucalyptus globulus</i> bark, an abundant industrial residue in the Portuguese pulp and paper sector, has a high potential to be converted into biobased products instead of being burned. This work aimed to evaluate the ethanol production from <i>E. globulus</i> bark previously submitted to kraft pulping through separate hydrolysis and fermentation (SHF) configuration. Fed-batch enzymatic hydrolysis provided a concentrated hydrolysate with 161.6 g·L<sup>−1</sup> of cellulosic sugars. <i>S. cerevisiae</i> and Ethanol Red<sup>®</sup> strains demonstrated a very good fermentation performance, despite a negligible xylose consumption. <i>S. passalidarum</i>, a yeast known for its capability to consume pentoses, was studied in a simultaneous co-culture with Ethanol Red<sup>®</sup>. However, bioethanol production was not improved. The best fermentation performance was achieved by Ethanol Red<sup>®</sup>, which provided a maximum ethanol concentration near 50 g·L<sup>−1</sup> and fermentation efficiency of 80%. Concluding, kraft pulp from <i>E. globulus</i> bark showed a high potential to be converted into cellulosic bioethanol, being susceptible to implementing an integrated biorefinery on the pulp and paper industrial plants.https://www.mdpi.com/1996-1073/14/8/2185bioethanolcellulosic sugarsenzymatic hydrolysiseucalyptus barkhydrolysatekraft pulp |
| spellingShingle | Mariana S. T. Amândio Jorge M. S. Rocha Luísa S. Serafim Ana M. R. B. Xavier Cellulosic Bioethanol from Industrial <i>Eucalyptus globulus</i> Bark Residues Using Kraft Pulping as a Pretreatment Energies bioethanol cellulosic sugars enzymatic hydrolysis eucalyptus bark hydrolysate kraft pulp |
| title | Cellulosic Bioethanol from Industrial <i>Eucalyptus globulus</i> Bark Residues Using Kraft Pulping as a Pretreatment |
| title_full | Cellulosic Bioethanol from Industrial <i>Eucalyptus globulus</i> Bark Residues Using Kraft Pulping as a Pretreatment |
| title_fullStr | Cellulosic Bioethanol from Industrial <i>Eucalyptus globulus</i> Bark Residues Using Kraft Pulping as a Pretreatment |
| title_full_unstemmed | Cellulosic Bioethanol from Industrial <i>Eucalyptus globulus</i> Bark Residues Using Kraft Pulping as a Pretreatment |
| title_short | Cellulosic Bioethanol from Industrial <i>Eucalyptus globulus</i> Bark Residues Using Kraft Pulping as a Pretreatment |
| title_sort | cellulosic bioethanol from industrial i eucalyptus globulus i bark residues using kraft pulping as a pretreatment |
| topic | bioethanol cellulosic sugars enzymatic hydrolysis eucalyptus bark hydrolysate kraft pulp |
| url | https://www.mdpi.com/1996-1073/14/8/2185 |
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