Bioconversion of the Brown Tunisian Seaweed Halopteris scoparia: Application to Energy

Farah Hadjkacem, Guillaume Pierre, Gwendoline Christophe, Jihen Elleuch, Imen Fendri, Zakaria Boual, Mohamed Didi Ould El Hadj, Zainab El Alaoui-Talibi, Cherkaoui El Modafar, Pascal Dubessay, Cédric Delattre, Philippe Michaud and Slim Abdelkafi
Additional contact information
Farah Hadjkacem: Laboratoire de Génie Enzymatique et Microbiologique, Equipe de Biotechnologie des Algues, Ecole Nationale d’Ingénieur de Sfax, Sfax 3038, Tunisia
Guillaume Pierre: Institut Pascal, Université Clermont Auvergne, CNRS, Clermont Auvergne INP, F-63000 Clermont-Ferrand, France
Gwendoline Christophe: Institut Pascal, Université Clermont Auvergne, CNRS, Clermont Auvergne INP, F-63000 Clermont-Ferrand, France
Jihen Elleuch: Laboratoire de Génie Enzymatique et Microbiologique, Equipe de Biotechnologie des Algues, Ecole Nationale d’Ingénieur de Sfax, Sfax 3038, Tunisia
Imen Fendri: Laboratory of Plant Biotechnologies Applied to the Improvement of Plants, Faculty of Sciences, University of Sfax, Sfax 3038, Tunisia
Zakaria Boual: Laboratory for the Protection of Ecosystems in Arid and Semi-Arid Zones, Kasdi Merbah-University, Ouargla 30000, Algeria
Mohamed Didi Ould El Hadj: Laboratory for the Protection of Ecosystems in Arid and Semi-Arid Zones, Kasdi Merbah-University, Ouargla 30000, Algeria
Zainab El Alaoui-Talibi: Centre d’Agrobiotechnologie et Bioingénierie, Unité de Recherche Labellisée CNRST (Centre AgroBiotech-URL-CNRST-05), Faculté des Sciences et Techniques Marrakech, Université Cadi Ayyad, Marrakech 40000, Morocco
Cherkaoui El Modafar: Centre d’Agrobiotechnologie et Bioingénierie, Unité de Recherche Labellisée CNRST (Centre AgroBiotech-URL-CNRST-05), Faculté des Sciences et Techniques Marrakech, Université Cadi Ayyad, Marrakech 40000, Morocco
Pascal Dubessay: Institut Pascal, Université Clermont Auvergne, CNRS, Clermont Auvergne INP, F-63000 Clermont-Ferrand, France
Cédric Delattre: Institut Pascal, Université Clermont Auvergne, CNRS, Clermont Auvergne INP, F-63000 Clermont-Ferrand, France
Philippe Michaud: Institut Pascal, Université Clermont Auvergne, CNRS, Clermont Auvergne INP, F-63000 Clermont-Ferrand, France
Slim Abdelkafi: Laboratoire de Génie Enzymatique et Microbiologique, Equipe de Biotechnologie des Algues, Ecole Nationale d’Ingénieur de Sfax, Sfax 3038, Tunisia

Energies, 2022, vol. 15, issue 12, 1-16

Abstract: The brown Tunisian seaweed Halopteris scoparia was used as a feedstock for producing renewable bioethanol, biogas, and biodiesel to demonstrate the proof of concept for the North African energy sector. A quantitative and qualitative quantification of H. scoparia composition using different colorimetric methods was completed to highlight its bioconversion potential. These substrate inputs were subjected to anaerobic fermentation by Saccharomyces cerevisiae to produce bioethanol. The materials were also used to generate bio-hydrogen and volatile fatty acids during dark fermentation by a bacterial consortium and using the oleaginous yeast Yarrowia lipolytica . The lipids were extracted and trans-esterified to Fatty Acid Methyl Esters (FAMEs), and their profiles were then analyzed with gas chromatography (GC). A significant ratio of the bioethanol, e.g., 0.35 g ethanol/g DW substrate, was produced without pretreatment, consistent with the theoretical Gay-Lussac yield. The production of the biohydrogen and lipids were up to 1.3 mL H 2 /g DW substrate and 0.04 g/g DW substrate, respectively, from the raw biomass. These results were higher than those reported for other well-studied seaweeds such as L. japonica . Overall, this work contributes to the current investigations in Tunisia for producing alternative energies from algae and finding new solutions to the current energy situation and environmental challenges in Maghreb.

Keywords: Halopteris scoparia; by-product; ethanol; bio-hydrogen; lipid; fermentation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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