Abstract
In this paper, the effects of different drying methods on proximate composition, pigment contents, and fatty acids profile of Isochrysis galbana were evaluated. The microalgae biomass was dried by freeze drying (FD), oven drying (OD), spray drying (SPD), and sun drying (SD) methods to identify the best procedure with the lowest negative impacts on the algae nutrient values including pigments, proximate composition, and fatty acid profile. The highest protein content was obtained in FD (62.200.15 %). Also, the lipid content of the dried microalga was significantly influenced by the drying process, while among all treatments, the highest and lowest values were measured in FD (13.770.42 %) and SD (11.680.16 %) samples, respectively (P
Highlights
Microalga with a simple structure uses carbon dioxide and dissolved nutrient ions in water via sunlight for synthesis of different organic materials like pigments and other bioactive compounds (Pokoo-Aikins et al, 2010; Sabzi et al, 2018; Rastar et al, 2018)
The results indicated that the highest protein content was obtained in freeze drying (FD) method compared to other methods
We found that different drying methods had significant impact on some chemical and biochemical compositions, fatty acids profile of I. galbana
Summary
Microalga with a simple structure uses carbon dioxide and dissolved nutrient ions in water via sunlight for synthesis of different organic materials like pigments and other bioactive compounds (Pokoo-Aikins et al, 2010; Sabzi et al, 2018; Rastar et al, 2018). These microorganisms contain potential source of polyunsaturated fatty acids (PUFAs), and have been known as a promising renewable source of biofuel due to their high growth rate, low land usage and relatively high extractable oil yield (Chisti, 2007; Brennan and Owende, 2010; DalmasNeto et al, 2014; Sabzi et al, 2018). This study attempt to compare the effects of four different drying methods i.e. spray, oven, solar and freeze drying on nutritional composition and fatty acids profile of I. galbana
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