The composition of brackish groundwater from Brazilian backlands contains important elements necessary for metabolism in microalgae. This study evaluated the use of 100% brackish groundwater with different amounts of Zarrouk nutrients for Spirulina sp. LEB 18 cultivation. The growth parameters and biomass composition, including the concentrations of proteins, carbohydrates, ash, lipids, and fatty acids, were evaluated. The best growth parameter results were obtained in the assay using 100% brackish groundwater and only 25% of Zarrouk nutrients, which were equal to those obtained for the control culture. The concentrations of carbohydrates and polyunsaturated fatty acids were increased by as much as 4- and 3.3-fold, respectively, when brackish groundwater was used in the cultures. The lipid profile demonstrated that the biomass had the potential for use in biodiesel production. The use of brackish groundwater is a sustainable, economical way to obtain high-quality biomass for different applications during Spirulina sp. LEB 18 cultivation.

中文翻译：

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螺旋藻养殖中来自巴西偏远地区的微咸地下水：碳水化合物和多不饱和脂肪酸生产的潜力。

来自巴西偏远地区的微咸地下水成分包含微藻类代谢所需的重要元素。这项研究评估了螺旋藻sp。的使用100％微咸地下水和不同量的Zarrouk营养物质。LEB 18栽培。评价了生长参数和生物量组成，包括蛋白质，碳水化合物，灰分，脂质和脂肪酸的浓度。使用100％的微咸地下水和25％的Zarrouk营养素可在试验中获得最佳的生长参数结果，与对照培养的结果相同。当在培养物中使用微咸水时，碳水化合物和多不饱和脂肪酸的浓度分别增加了4倍和3.3倍。脂质谱表明生物质具有用于生物柴油生产的潜力。微咸地下水的使用是一种可持续的，经济的方式，可以在螺旋藻期间获得用于不同应用的高质量生物质。LEB 18栽培。