Effect of High-Pressure Treatment on the Quality of a Hericium erinaceus: Millet Composite Beverage

Abstract

Hericiumerinaceus-millet (HM) composite beverage was prepared by mixing Hericium erinaceus juice and millet juice and then subjected to high-pressure processing (HPP) of 300 MPa and 600 MPa at room temperature and thermal processing (TP) of 100°C for 3 min. The differences in pH, total soluble solids, amino acid nitrogen content, total colony numbers, sensory scores, and shelf life of HPP-treated and TP-treated samples stored at 4°C, 27°C, and 37°C for 80 days and the differences in volatile substances stored at 4°C and 27°C for 30 days were studied. The results showed that there was no significant difference in total soluble solids, amino acid nitrogen, and pH when comparing HPP- and TP-treated HM beverages. The order of HM beverages' shelf life following different treatments was as follows: TP-treated >600 MPa HPP-treated >300 MPa HPP-treated. When stored at 4°C, the shelf life of the three treatments was 63, 52, and 39 days, respectively. Compared with TP-treated beverages, HPP-treated beverages better retained their ester flavor compounds, especially ethyl acetate. Moreover, the main volatile compounds in TP-treated beverages changed more during storage than those in HPP-treated beverages. Overall, HPP-treated beverages had advantages in terms of flavor over TP-treated beverages.