This study aimed to evaluate the novel valorization of wastewater through the desalination process of concentrated saline water (CSW) originating from the semiarid regions of Brazil using the growth of two microalgae and modeling their growth using a kinetic model. Chlorella vulgaris and Ankistrodesmus fusiformis were cultured for 15 days in BG 11 medium that was partially replaced with wastewater, and the data from the best growing conditions were fitted to the model of Gompertz. The CSW had a low heavy metal concentration and both algae grew under all conditions studied. However, each microalga exhibited a different behavior under the same conditions. C. vulgaris remained only in the adaptation phase when it was cultured in 100% CSW. In contrast, A. fusiformis was only 3 days in the lag phase and had 67% more biomass than C. vulgaris. 75% CSW was best for both microalgae. This study demonstrates a circular bioeconomy model that can be applied to semiarid regions to provide water and food security for the local population. The potential of A. fusiformis has also been highlighted; however, it has not yet been explored in the field of microalgae culture.

本研究旨在通过源自巴西半干旱地区的浓盐水 (CSW) 的淡化过程，利用两种微藻的生长来评估废水的新颖价值，并使用动力学模型对其生长进行建模。将普通小球藻和梭形钩链藻在用废水部分替换的 BG 11 培养基中培养 15 天，并将最佳生长条件的数据拟合到 Gompertz 模型。CSW 的重金属浓度较低，并且两种藻类在所有研究条件下都能生长。然而，每种微藻在相同条件下表现出不同的行为。当C. vulgaris在 100% CSW 中培养时，它仅处于适应阶段。相比之下，A. fusiformis 的滞后期只有 3 天，并且生物量比C. vulgaris 高出 67%。75% CSW 对于两种微藻来说效果最佳。这项研究展示了一种循环生物经济模型，可应用于半干旱地区，为当地居民提供水和粮食安全。A. fusiformis的潜力也得到了强调；然而，在微藻培养领域尚未得到探索。