Multiphase Flows, Reactors and Intensification Group, Bernal Institute, University of Limerick, Ireland.
Multiphase Flows, Reactors and Intensification Group, Bernal Institute, University of Limerick, Ireland.
Ultrason Sonochem. 2023 Mar;94:106347. doi: 10.1016/j.ultsonch.2023.106347. Epub 2023 Feb 28.
Macroalgae have a tremendous potential to become an important renewable resource for valuable biomolecules and chemicals. New and improved ways of cell disruption and of enhancing rate as well as yield of extraction of valuable products from macroalgae are needed to fully realise this potential. In this work, hydrodynamic cavitation (HC) was used for intensifying rate and yield of extraction of phycoerythrin, proteins and carbohydrates from marine macroalgae Palmaria palmata. We use vortex-based HC devices which do not use small restrictions like orifice-based HC devices or moving parts like rotor-stator based HC devices. A bench scale setup with a nominal slurry flow rate of 20 LPM was established. Dried and powdered macroalgae was used. Influence of key operating parameters like pressure drop and number of passes on extraction performance (the rate and yield) was measured. A simple, yet effective model was developed and used for interpreting and describing experimental data. The results indicate that there exists an optimum pressure drop across the device at which extraction performance is maximum. The extraction performance with HC was found to be significantly better than the stirred vessels. HC has resulted in 2 to 20 times improvement in the rate of extraction of phycoerythrin (R-PE), proteins and carbohydrates. Based on the results obtained in this work, pressure drop of 200 kPa and number of passes through the HC devices of about 100 were found to be most effective for HC-assisted intensified extraction from macroalgae. The presented results and model will be useful for harnessing vortex-based HC devices for intensifying the extraction of valuable products from macroalgae.
大型藻类具有成为有价值生物分子和化学物质的重要可再生资源的巨大潜力。需要新的和改进的细胞破碎方法，以及提高从大型藻类中提取有价值产品的速率和产率的方法，才能充分发挥这种潜力。在这项工作中，水力空化 (HC) 用于强化从海洋大型藻类掌状红皮藻中提取藻红蛋白、蛋白质和碳水化合物的速率和产率。我们使用基于涡流的 HC 装置，这些装置不像基于孔口的 HC 装置那样使用小的限制，也不像基于转子-定子的 HC 装置那样使用移动部件。建立了一个名义浆料流量为 20 LPM 的台架规模装置。使用干燥和粉末状的大型藻类。测量了关键操作参数（如压降和通过次数）对提取性能（速率和产率）的影响。开发了一个简单而有效的模型，用于解释和描述实验数据。结果表明，在提取性能最大的装置中存在最佳压降。与搅拌容器相比，HC 的提取性能明显更好。HC 使藻红蛋白 (R-PE)、蛋白质和碳水化合物的提取速率提高了 2 到 20 倍。根据本工作的结果，发现 HC 辅助强化从大型藻类中提取时，压降为 200 kPa，通过 HC 装置的次数约为 100 次最为有效。所提出的结果和模型将有助于利用基于涡流的 HC 装置来强化从大型藻类中提取有价值的产品。
