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Seasonal variation in the nutrient profile of Arthrospira fusiformis biomass harvested from an Ethiopian soda lake, Lake Chitu

Assaye, Hirut; Belay, Amha; Desse, Gulelat; Gray, David

Seasonal variation in the nutrient profile of Arthrospira fusiformis biomass harvested from an Ethiopian soda lake, Lake Chitu Thumbnail


Authors

Hirut Assaye

Amha Belay

Gulelat Desse

DAVID GRAY david.gray@nottingham.ac.uk
Professor of Applied Lipid Science



Abstract

The extent of seasonal variation in the nutrient profile of Arthrospira biomass harvested from Lake Chitu was investigated to evaluate the variability of the quality of the product over a period of a year. Protein content varied from 47.9 to 55.7% for wet season biomass samples and from 39.2 to 40.8% for dry season samples. Dry season samples were characterized by relatively higher carbohydrate values (38.0–41.3%). Higher proportion of amino acids and unsaturated fatty acids were recorded for biomass harvested in wet season. Similarly, higher contents of phytonutrients (pigments) were recorded for wet season biomass samples: chlorophyll a (8.2–10.3 mg g−1), phycobiliproteins (104.1–120.7 mg g−1), total carotenoids (3.17–4.31 mg g−1), and β-carotene (1.24–1.61 mg g−1). The contents of Na and K were higher for a dry season biomass whereas other major (Ca, P, Mg) and trace (Mn, Fe, Cu, Zn, Se) minerals were found relatively in higher quantities in a wet season biomass. The nutritional composition of Arthrospira from Lake Chitu was found to be relatively comparable to that found in commercial Arthrospira products in the market. The significance of the findings is discussed in relation to potential sustainable production of Arthrospira biomass from this lake.

Journal Article Type Article
Acceptance Date Nov 27, 2017
Online Publication Date Dec 19, 2017
Deposit Date Dec 20, 2017
Publicly Available Date Dec 20, 2018
Journal Journal of Applied Phycology
Print ISSN 0921-8971
Electronic ISSN 0921-8971
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
DOI https://doi.org/10.1007/s10811-017-1359-0
Keywords Arthrospira ; Nutrient profile ; Seasonal variation ; Soda Lake
Public URL https://nottingham-repository.worktribe.com/output/901100
Publisher URL https://link.springer.com/article/10.1007%2Fs10811-017-1359-0