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Integrating sugarcane molasses into sequential cellulosic biofuel production based on SSF process of high solid loading
BACKGROUND: Sugarcane bagasse (SCB) is one of the most promising lignocellulosic biomasses for use in the production of biofuels. However, bioethanol production from pure SCB fermentation is still limited by its high process cost and low fermentation efficiency. Sugarcane molasses, as a carbohydrate...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6297951/ https://www.ncbi.nlm.nih.gov/pubmed/30568729 http://dx.doi.org/10.1186/s13068-018-1328-0 |
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author | Fan, Meishan Zhang, Shuaishuai Ye, Guangying Zhang, Hongdan Xie, Jun |
author_facet | Fan, Meishan Zhang, Shuaishuai Ye, Guangying Zhang, Hongdan Xie, Jun |
author_sort | Fan, Meishan |
collection | PubMed |
description | BACKGROUND: Sugarcane bagasse (SCB) is one of the most promising lignocellulosic biomasses for use in the production of biofuels. However, bioethanol production from pure SCB fermentation is still limited by its high process cost and low fermentation efficiency. Sugarcane molasses, as a carbohydrate-rich biomass, can provide fermentable sugars for ethanol production. Herein, to reduce high processing costs, molasses was integrated into lignocellulosic ethanol production in batch modes to improve the fermentation system and to boost the final ethanol concentration and yield. RESULTS: The co-fermentation of pretreated SCB and molasses at ratios of 3:1 (mixture A) and 1:1 (mixture B) were conducted at solid loadings of 12% to 32%, and the fermentation of pretreated SCB alone at the same solid loading was also compared. At a solid loading of 32%, the ethanol concentrations of 64.10 g/L, 74.69 g/L, and 75.64 g/L were obtained from pure SCB, mixture A, and mixture B, respectively. To further boost the ethanol concentration, the fermentation of mixture B (1:1), with higher solid loading from 36 to 48%, was also implemented. The highest ethanol concentration of 94.20 g/L was generated at a high solid loading of 44%, with an ethanol yield of 72.37%. In addition, after evaporation, the wastewater could be converted to biogas by anaerobic digestion. The final methane production of 312.14 mL/g volatile solids (VS) was obtained, and the final chemical oxygen demand removal and VS degradation efficiency was 85.9% and 95.9%, respectively. CONCLUSIONS: Molasses could provide a good environment for the growth of yeast and inoculum. Integrating sugarcane molasses into sequential cellulosic biofuel production could improve the utilization of biomass resources. |
format | Online Article Text |
id | pubmed-6297951 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-62979512018-12-19 Integrating sugarcane molasses into sequential cellulosic biofuel production based on SSF process of high solid loading Fan, Meishan Zhang, Shuaishuai Ye, Guangying Zhang, Hongdan Xie, Jun Biotechnol Biofuels Research BACKGROUND: Sugarcane bagasse (SCB) is one of the most promising lignocellulosic biomasses for use in the production of biofuels. However, bioethanol production from pure SCB fermentation is still limited by its high process cost and low fermentation efficiency. Sugarcane molasses, as a carbohydrate-rich biomass, can provide fermentable sugars for ethanol production. Herein, to reduce high processing costs, molasses was integrated into lignocellulosic ethanol production in batch modes to improve the fermentation system and to boost the final ethanol concentration and yield. RESULTS: The co-fermentation of pretreated SCB and molasses at ratios of 3:1 (mixture A) and 1:1 (mixture B) were conducted at solid loadings of 12% to 32%, and the fermentation of pretreated SCB alone at the same solid loading was also compared. At a solid loading of 32%, the ethanol concentrations of 64.10 g/L, 74.69 g/L, and 75.64 g/L were obtained from pure SCB, mixture A, and mixture B, respectively. To further boost the ethanol concentration, the fermentation of mixture B (1:1), with higher solid loading from 36 to 48%, was also implemented. The highest ethanol concentration of 94.20 g/L was generated at a high solid loading of 44%, with an ethanol yield of 72.37%. In addition, after evaporation, the wastewater could be converted to biogas by anaerobic digestion. The final methane production of 312.14 mL/g volatile solids (VS) was obtained, and the final chemical oxygen demand removal and VS degradation efficiency was 85.9% and 95.9%, respectively. CONCLUSIONS: Molasses could provide a good environment for the growth of yeast and inoculum. Integrating sugarcane molasses into sequential cellulosic biofuel production could improve the utilization of biomass resources. BioMed Central 2018-12-18 /pmc/articles/PMC6297951/ /pubmed/30568729 http://dx.doi.org/10.1186/s13068-018-1328-0 Text en © The Author(s) 2018 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. |
spellingShingle | Research Fan, Meishan Zhang, Shuaishuai Ye, Guangying Zhang, Hongdan Xie, Jun Integrating sugarcane molasses into sequential cellulosic biofuel production based on SSF process of high solid loading |
title | Integrating sugarcane molasses into sequential cellulosic biofuel production based on SSF process of high solid loading |
title_full | Integrating sugarcane molasses into sequential cellulosic biofuel production based on SSF process of high solid loading |
title_fullStr | Integrating sugarcane molasses into sequential cellulosic biofuel production based on SSF process of high solid loading |
title_full_unstemmed | Integrating sugarcane molasses into sequential cellulosic biofuel production based on SSF process of high solid loading |
title_short | Integrating sugarcane molasses into sequential cellulosic biofuel production based on SSF process of high solid loading |
title_sort | integrating sugarcane molasses into sequential cellulosic biofuel production based on ssf process of high solid loading |
topic | Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6297951/ https://www.ncbi.nlm.nih.gov/pubmed/30568729 http://dx.doi.org/10.1186/s13068-018-1328-0 |
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