The current environmental scenario has encouraged the study of renewable and competitive alternative feedstocks for biodiesel production. Microalgae present a significant opportunity as a feedstock that does not require arable land and can be cultivated using wastewater. The paper investigates the optimization of biodiesel production from microalgae bio-oil using response surface methodology and also analyzes the main physicochemical properties of the bio-oil. It was confirmed that this methodology is suitable for materials with low homogeneity. The model is also adequate for determining optimal experimental conditions, resulting in a FAME content of 87.25 %. The biodiesel's physicochemical properties were analyzed. It was discovered that the high degree of unsaturation in the microalgae bio-oil's chemical structure resulted in a narrower temperature range for its application compared to other vegetable sources.

中文翻译：

---

从微藻微拟球藻生产生物柴油：酯交换反应的优化和物理化学表征


当前的环境状况鼓励了对用于生物柴油生产的可再生和有竞争力的替代原料的研究。微藻作为原料提供了巨大的机会，不需要耕地并且可以利用废水进行培养。本文利用响应面法研究了微藻生物油生产生物柴油的优化，并分析了生物油的主要理化性质。经证实，该方法适用于均质性较低的材料。该模型也足以确定最佳实验条件，导致 FAME 含量为 87.25%。分析了生物柴油的物理化学性质。研究发现，与其他植物来源相比，微藻生物油的化学结构高度不饱和，导致其应用温度范围更窄。