This study presents an innovative and promising technology, Water Cycling Combined Fermentation Broth (WC2FB), which offers a sustainable solution to significantly reduce the costs associated with microalgae-based biodiesel production. The innovative approach involves utilizing food waste as a nutrient source, supplemented by recycled water after microalgae harvesting, with the goal of improving the viability of industrial biofuel production. The results of nutrient removal efficiency demonstrated that the addition of 15% fermentation broth to the microalgal suspension efficiently utilized volatile fatty acids, resulting in a significant increase in lipid content. Additionally, biocomponent analysis confirmed that the WC2FB mode did not compromise the desirable properties of biodiesel. Through techno-economic simulations, we predicted a 90% probability of achieving net present value (NPV) at a selling price of $5/kg. Finally, we recommended that directing future efforts be directly towards the development of culture devices, low-cost bioflocculation methods, and biorefinery extraction to further advance biodiesel production.

中文翻译：

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将发酵液与废水回收相结合用于微藻培养：营养物再利用、生物柴油生产和技术经济模拟


本研究提出了一种创新且有前途的技术，即水循环联合发酵液 （WC2FB），它提供了一种可持续的解决方案，可显著降低与基于微藻的生物柴油生产相关的成本。这种创新方法包括利用食物垃圾作为营养来源，并在微藻收获后补充回收水，以提高工业生物燃料生产的可行性。营养物去除效率的结果表明，在微藻悬浮液中添加 15% 的发酵液可有效利用挥发性脂肪酸，导致脂质含量显着增加。此外，生物成分分析证实 WC2FB 模式不会影响生物柴油的理想特性。通过技术经济模拟，我们预测以 5 美元/千克的售价实现净现值 （NPV） 的可能性为 90%。最后，我们建议将未来的工作直接用于开发培养装置、低成本生物絮凝方法和生物精炼提取，以进一步推进生物柴油生产。