Bioethanol production from Gracilaria verrucosa, a red alga, in a biorefinery approach
Abstract
In this study, Gracilaria verrucosa, red seaweed has been used for production of agar and bioethanol. The algae harvested at various time durations resulted in extraction of ~27-33% agar. The leftover pulp was found to contain ~62-68% holocellulose, which on enzymatic hydrolysis yielded 0.87 g sugars/g cellulose. The enzymatic hydrolysate on fermentation with Saccharomyces cerevisiae produced ethanol with an ethanol yield of 0.43 g/g sugars. The mass balance evaluation of the complete process demonstrates that developing biorefinery approach for exploiting Gracilaria verrucosa, a red alga, could be commercially viable.
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Gracilaria contains sufficient cellulose that fermentation with Saccharomyces cerevisiae can yield ethanol at levels similar to corn (0.48 g/g sugar) and newspaper waste (0.39 g/g sugar).
“However, it contains sufficient cellulose that its fermentation with Saccharomyces cerevisiae can yield ethanol at levels similar to corn (0.48 g · g -1 sugar) and newspaper waste (0.39 g · g -1 sugar) [78].”
From Key Targets for Improving Algal Biofuel Production (2021) · cites this paper as [78]
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References 35 · Cited by 319
- Authors
- Kumar, S., Gupta, R., Kumar, G., Sahoo, D., & Kuhad, R. C.
- Affiliations
- University of Delhi (IN)
- Corresponding author
- Sahoo, Dinabandhu
- Kuhad, Ramesh Chander
- Venue
- Bioresource Technology
- Publisher
- Elsevier BV
- Published
- 2013-05
- Volume
- 135
- Pages
- 150-156
- ISSN
- 0960-8524 (ISSN-L)
- OpenAlex
- W2156437782
- Cited by
- 319
- References
- 35
- Citations by year
- 2026: 18 · 2025: 16 · 2024: 27 · 2023: 23 · 2022: 27 · 2021: 29 · 2020: 25 · 2019: 28 · 2018: 24 · 2017: 30 · 2016: 22 · 2015: 26 · 2014: 18 · 2013: 5
- FWCI
- 8.93
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Bioresource Technology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Biofuel production and bioconversion
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
- Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Seaweed-derived Bioactive Compounds
- Keywords
- Gracilaria verrucosa, red algae, bioethanol production, agar extraction, holocellulose, enzymatic hydrolysis, Saccharomyces cerevisiae fermentation, biorefinery, mass balance, seaweed valorization
- MeSH terms
- Agar, Ethanol, Biotechnology, Carbohydrates, Cellulase, Fermentation, Hydrolysis, Seasons, Biomass, Gracilaria, Biofuels
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