Basic electrolyzed water coupled with ultrasonic treatment improves the functional properties and digestibility of Antarctic krill proteins

•Basic electrolyzed water coupled with ultrasonic (USBEW) modify protein was proposed;•USBEW protected the active groups of Antarctic krill proteins (AKPs) from oxidation;•USBEW significantly improved the solubility and decreased the particle size;•Functional Properties of AKPs was greatly improved by USBEW treatment;•The in vitro digestibility of AKPs treated by USBEW was significantly increased.