Protein recovery from yellow peas (Pisum sativum L.) for enhanced processing sustainability and functional properties

Abstract

This research focuses on sustainable protein recovery methods from a new yellow pea variety by examining alternativepH-shifting processes. The study focuses on reducing water consumption during alkaline extraction by adjustingsolid-liquid ratios, and evaluating the impact of various isoelectric precipitants, including lactic acid and lactic acidbacteria (Lactobacillus plantarum and Lactobacillus lactis), on the functional and antioxidant properties of productsacross a wide range of pH values. It was here found that the process alternative with three 1:10 (w/v) extractioncycles and lactic acid bacteria as precipitant agent achieved high process productivity (0.36 kg protein product/kgpea flour) and low specific water consumption (94.9 kg water/kg protein product). No significant differences wereobserved in protein content and yield when compared to other flour-water ratios with higher water consumptionor less eco-friendly precipitants. Products precipitated with lactic acid bacteria formed stable emulsions even at theisoelectric point, exhibited superior free radical scavenging activity, although solubility and water holding capacitywere lower, and no differences were noted in oil holding capacity, foaming capacity, and foam stability.