Environment and Biofuel Research Laboratory, Department of Hydro and Renewable Energy (HRED), Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India.
Department of Chemical and Process Engineering, Faculty of Engineering, University of Moratuwa, Moratuwa 10400, Sri Lanka.
Bioresour Technol. 2024 Oct;410:131241. doi: 10.1016/j.biortech.2024.131241. Epub 2024 Aug 14.
The current study investigated the effect of iron oxide nanoparticles (IONPs) on mixotrophic microalgae cultivation in wastewater for biofuel production. Optimal IONPs doses of 10 and 20 mg L increased Chlorella pyrenoidosa growth by 16% and lipid accumulation by 53 %, respectively, compared with the control group. Conversely, the protein content declined drastically, while carbohydrates remained relatively unchanged. A maximum of 15% rise in biomass growth was observed for Chlorella sorokiniana IITRF at an IONPs dose of 20 mg L, with no significant variation in biochemical composition. Microalgae grown under mixotrophic conditions with IONPs in a biofilm reactor were more suitable for biogas production than biodiesel, increasing biogas and methane content by 38 and 48%, respectively. The findings suggest that low doses of IONPs can enhance microalgal biomass, biogas production and methane content. Further, metabolomics studies are warranted to investigate the interaction between microalgae and nanoparticles to achieve high-quality biodiesel.
本研究探讨了氧化铁纳米粒子（IONPs）对废水混合培养微藻生产生物燃料的影响。与对照组相比，10 和 20 mg/L 的最佳 IONPs 剂量分别使蛋白核小球藻的生长增加了 16%，脂质积累增加了 53%。相反，蛋白质含量急剧下降，而碳水化合物含量相对不变。在 20 mg/L 的 IONPs 剂量下，Chlorella sorokiniana IITRF 的生物量增长最多增加了 15%，生物化学组成没有明显变化。在生物膜反应器中，微藻在混合营养条件下生长并添加 IONPs 更适合用于沼气生产，沼气和甲烷含量分别增加了 38%和 48%。研究结果表明，低剂量的 IONPs 可以提高微藻生物质、沼气产量和甲烷含量。此外，有必要进行代谢组学研究，以研究微藻和纳米颗粒之间的相互作用，从而获得高质量的生物柴油。
