1. Exploitation of bones-rich poultry by-products to produce protein hydrolysates: optimization of hydrolysis parameters and chemical characterization.
- Author
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Prandi B, Samaei S, Beninati F, Nardi A, Tedeschi T, and Sforza S
- Subjects
- Animals, Hydrolysis, Bone and Bones chemistry, Poultry Products analysis, Poultry, Protein Hydrolysates chemistry, Chickens
- Abstract
A significant quantity of bone-rich poultry by-products must be disposed of by poultry processors. These products still contain a significant amount of nutritionally valuable animal proteins. In the present work, a hydrolysis protocol was optimized to recover the protein fraction of bone-rich poultry by-products while simultaneously minimizing the amount of water required for hydrolysis (thus reducing drying costs) and recycling the hydrolytic broth up to 3 times, to reduce the cost of the proteolytic enzyme. The final hydrolysis conditions involved the use of (protease from B. licheniformis, ≥2.4 U/g; 0.5 V/w of raw material) and a hydrolysis time of 2 h at 65°C. The protein hydrolysate obtained has a high protein content (79-86%), a good amino acid profile (chemical amino acid score equal to 0.7-0.8) and good gastric digestibility (about 30% of peptide bonds are already hydrolyzed before digestion). This supports its use as an ingredient in food, pet food or animal feed formulations., Competing Interests: DISCLOSURES The authors declare no conflicts of interest., (Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.)
- Published
- 2024
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