Abstract:Nutritional compositions of fish protein hydrolysate (FPH), ultramembrane filtered fish protein hydrolysate (UF） FPH, fishmeal, casein, and soybean meal were analyzed and compared in this study. The results showed that the content of protein in ultramembrane filtered fish protein hydrolysate was significantly higher than that in fish protein hydrolysate without ultrafiltration. The lipid content in fish protein hydrolysate was reduced by ultrafiltration and the ash content was increased. The total amino acid in fish protein hydrolysate, ultramembrane filtered fish protein hydrolysate, fishmeal, casein, and soybean meal were 62.24, 62.34, 50.78, 74.33, 37.36 mg/100mg, respectively, and the percentage of essential amino acids to the total amino acids (EAA/TAA) were 47.41%, 49.47%, 49.90%, 48.41%, 49.25%, respectively. Taurine is rich in fish protein hydrolysate. Fish protein hydrolysate and fishmeal also have abundant iodine, selenium and vitamin B2, B5. In conclusion, fish protein hydrolysate is a high quality protein material with balanced amino acids, relatively high contents of vitamin B2 and B5, and abundant microelements of iodine and selenium.
