Optimisation of parameters for the extraction of β-amylase from sweet potato via liquid biphasic floatation

This study explores the application of liquid biphasic flotation (LBF) for the extraction of β-amylase from sweet potato ( Ipomoea batatas ), aiming to provide a greener and more sustainable alternative to traditional extraction methods. The LBF method combines solvent sublation with liquid biphasic systems, offering potential advantages in terms of energy-efficient extraction, reduced environmental impact, and improved resource efficiency. Experimental investigations were conducted to assess the effects of salt concentration, solvent amount, and flotation time on β-amylase extraction efficiency and separation performance. Results indicate that optimal conditions for β-amylase extraction were achieved at a salt concentration of 0.3 g/mL, a solvent amount of 60 mL, and a flotation time of 15 min with a salt/solvent combination of trisodium citrate and tert-butanol. These optimal conditions resulted in an amylase yield of 18.29%, with a separation efficiency of 0.06% and a purification factor of 291.90. Comparative analysis with liquid biphasic systems (LBS) revealed that the LBF method provided higher efficiency and yield, contributing to more sustainable practices in enzyme extraction. The LBF method shows promise due to its improved performance and potential for reducing the environmental footprint of industrial processes, supporting both innovation and environmental sustainability. This research also studied the effect of various parameters on phase formation and separation efficiency, offering a more thorough understanding of the LBF system that can be applied to future studies with broader sustainability goals.