Obtenção e caracterização físico-química e nutricional de concentrado proteico de resíduos de filetagem de Saramunete, Pseudupeneus maculatus (Bloch, 1793)

Abstract

The aim of the present study was to obtain and characterize the protein concentrate of saramunete filleting waste, Pseudupeneus maculatus. Two types of protein concentrates (PCS) were developed, type A and type B, and yield, pH, water activity, color, volatile nitrogenous bases, moisture, protein, fat and ashes were evaluated. Type A PCS showed lower yield, despite being more acidic (lower pH) and having higher L* value, lower a* value and higher b* value than type B PCS. The water activity, percentage of moisture and volatile nitrogenous bases of the PCS were low and there was no difference between treatments. Type A PCS showed a higher percentage of protein and less ash, indicating better protein quality. In addition, it presented a lower amount of lipids, possibly being less susceptible to lipid oxidation. Therefore, PCS type A is a good way to add value to saramunete waste because it has good yield, adequate physicochemical characteristics, nutritional aspects compatible with other fish protein concentrates, with potential for use in food products