Rao N R H, Beyer V P, Henderson R K, Thielemans W, Muylaert K
Laboratory of Aquatic Biology, KU Leuven, Kulak Kortrijk, 8500 Kortrijk, Belgium; Sustainable Materials Lab, Department of Chemical Engineering, KU Leuven, Kulak Kortrijk, 8500 Kortrijk, Belgium.
Sustainable Materials Lab, Department of Chemical Engineering, KU Leuven, Kulak Kortrijk, 8500 Kortrijk, Belgium.
Bioresour Technol. 2023 Apr;374:128786. doi: 10.1016/j.biortech.2023.128786. Epub 2023 Feb 22.
Flocculation combined with dissolved air flotation (DAF) is a promising technology for harvesting microalgae; therefore, optimisation of flocculant-DAF operating conditions are frequently explored in laboratory experiments. DAF systems have jars of differing volumes, height to diameter ratios, shapes and materials used to manufacture the jars; thus, the harvesting efficiency (η) may differ between these jars. The aim was to systematically compare η between different types of benchtop DAF jars. Evaluation of 30 different types of DAF jars revealed that η was not influenced by the volume of the jars, but was impacted by the height to diameter ratio, with optimal η at a ratio ranging between 1.6 and 2.05. There was no difference in η between cylindrical and cuboid jars, but jars made of hydrophobic (polypropylene) plastic resulted in a lower η. Overall, these results are useful to guide the design of lab-scale DAF microalgae harvesting experiments.
絮凝结合溶气气浮（DAF）是一种很有前景的微藻采收技术；因此，实验室实验中经常探索絮凝剂 - DAF操作条件的优化。DAF系统有不同体积、高径比、形状以及用于制造罐体的材料的罐体；因此，这些罐体之间的采收效率（η）可能会有所不同。目的是系统地比较不同类型的台式DAF罐体之间的η。对30种不同类型的DAF罐体的评估表明，η不受罐体体积的影响，但受高径比的影响，最佳η出现在1.6至2.05的比例范围内。圆柱形和长方体罐体之间的η没有差异，但由疏水性（聚丙烯）塑料制成的罐体导致η较低。总体而言，这些结果有助于指导实验室规模的DAF微藻采收实验的设计。
