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Sargassum Inundations in Turks and Caicos: Methane Potential and Proximate, Ultimate, Lipid, Amino Acid, Metal and Metalloid Analyses

Author

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  • John James Milledge

    (Faculty of Engineering and Science, University of Greenwich, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK)

  • Supattra Maneein

    (Faculty of Engineering and Science, University of Greenwich, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK)

  • Elena Arribas López

    (Faculty of Engineering and Science, University of Greenwich, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK)

  • Debbie Bartlett

    (Faculty of Engineering and Science, University of Greenwich, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK)

Abstract

The Caribbean has been experiencing beach inundations of pelagic Sargassum, causing environmental, health and financial issues. This study showed variations in the composition and methane potential (MP) between the species of Sargassum. The MPs for S. natans VIII , S. natans I and S. fluitans (145, 66 and 113 mL CH 4 g −1 Volatile Solids) were considerably below theoretical potentials, possibly due to the high levels of indigestible fibre and inhibitors. The mixed mats Sargassum composition was substantially different from the individual species, being higher in ash, calcium, iron, arsenic and phenolics. The mixed mats produced no methane, perhaps due to the high levels of phenolics. There was a strong correlation between MP and phenolic content. Heavy metals and metalloids were at levels that should not cause concern, except for arsenic (21–124 mg kg −1 dry weight). Further work on the speciation of arsenic in Sargassum is required to fully determine the risk to health and agriculture. Both protein and lipid levels were low. The ‘indispensable amino acid’ profile compares favourably with that recommended by the World Health Organisation. Lipids had a high proportion of Polyunsaturated Fatty Acids. The use of Sargassum for biogas production could be challenging, and further work is required.

Suggested Citation

  • John James Milledge & Supattra Maneein & Elena Arribas López & Debbie Bartlett, 2020. "Sargassum Inundations in Turks and Caicos: Methane Potential and Proximate, Ultimate, Lipid, Amino Acid, Metal and Metalloid Analyses," Energies, MDPI, vol. 13(6), pages 1-27, March.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:6:p:1523-:d:336117
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    References listed on IDEAS

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    Cited by:

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    2. Héctor Alfredo López-Aguilar & Bryan Morales-Durán & David Quiroz-Cardoza & Antonino Pérez-Hernández, 2023. "Lag Phase in the Anaerobic Co-Digestion of Sargassum spp. and Organic Domestic Waste," Energies, MDPI, vol. 16(14), pages 1-15, July.
    3. Rivera-Hernández, Yessica & Hernández-Eugenio, Guadalupe & Balagurusamy, Nagamani & Espinosa-Solares, Teodoro, 2022. "Sargassum-pig manure co-digestion: An alternative for bioenergy production and treating a polluting coastal waste," Renewable Energy, Elsevier, vol. 199(C), pages 1336-1344.
    4. Yiru Zhao & Nathalie Bourgougnon & Jean-Louis Lanoisellé & Thomas Lendormi, 2022. "Biofuel Production from Seaweeds: A Comprehensive Review," Energies, MDPI, vol. 15(24), pages 1-34, December.
    5. Enrique Salgado-Hernández & Ángel Isauro Ortiz-Ceballos & Sergio Martínez-Hernández & Erik Samuel Rosas-Mendoza & Ana Elena Dorantes-Acosta & Andrea Alvarado-Vallejo & Alejandro Alvarado-Lassman, 2022. "Methane Production of Sargassum spp. Biomass from the Mexican Caribbean: Solid–Liquid Separation and Component Distribution," IJERPH, MDPI, vol. 20(1), pages 1-13, December.
    6. Cristiane Bueno & João Adriano Rossignolo & Letícia Missiatto Gavioli & Camila Cassola Assunção Sposito & Fernando Gustavo Tonin & Mariana Matera Veras & Maria Júlia Bassan de Moraes & Gabriela Pitoll, 2023. "Life Cycle Assessment Applied to End-of-Life Scenarios of Sargassum spp. for Application in Civil Construction," Sustainability, MDPI, vol. 15(7), pages 1-23, April.

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