Introduction of macroalgae as a source of biodiesel in Iran: analysis of total lipid content, fatty acid and biodiesel indices

The aim of this work was to describe and compare the main fatty acids and biodiesel indices of some green and brown macroalgae (seaweeds) collected from the Persian Gulf, as an alternative raw material for renewable biodiesel production. The macroalgae showed low lipid content (< 10% DW) but mari...

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Bibliographic Details
Published in:Journal of the Marine Biological Association of the United Kingdom 2021-05, Vol.101 (3), p.527-534
Main Authors: Jeliani, Zahra Zarei, Fazelian, Nasrin, Yousefzadi, Morteza
Format: Article
Language:English
Subjects:
Agricultural commodities
Algae
Alternative energy sources
Aquatic plants
Biodiesel fuels
Biofuels
Biomass
Carbohydrates
Chlorophyta
Climate change
Cold flow
Diesel
Fatty acids
Fish
Fish oils
Flow index
Fossil fuels
Freshwater resources
Lipids
Oleic acid
Palmitic acid
Polyunsaturated fatty acids
Raw materials
Seaweeds
Seeds
Sensors
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Summary:The aim of this work was to describe and compare the main fatty acids and biodiesel indices of some green and brown macroalgae (seaweeds) collected from the Persian Gulf, as an alternative raw material for renewable biodiesel production. The macroalgae showed low lipid content (< 10% DW) but marine macroalgae with total lipid content > 5% DW are a good source for biodiesel production. The total lipid content and saturated fatty acids (SFAs) of green algae were higher than that of brown algae, while higher accumulation of unsaturated fatty acids (USFAs) was observed in brown seaweeds. Further, the main fatty acid in all studied seaweeds was palmitic acid (C16:0), which was followed by oleic acid (C18:1). The results of this work showed that three of the green algae, especially C. sertularioides, could be a potential source of fatty acids for biodiesel production owing to their high total lipid content, high cold flow indices (long chain saturated factor, cold filter plugging point and cloud point) and a fatty acid profile rich in SFAs with a high amount of C18:1, which is suitable for oil-based bio products. In contrast, the brown seaweeds Sargassum boveanum and Sirophysalis trinodis lipid content had a high proportion of polyunsaturated fatty acids (PUFAs), which makes them suitable for replacing fish oil.
ISSN:0025-3154
1469-7769
DOI:10.1017/S0025315421000382