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Summary of thesis: Recovery of protein hydrolysate and hydroxyapatite from catfish by-products and their oriented application for Pacific white shrimp feed

Objectives: To develop a process to recover value-added products, especially in FPH and HA, from catfish by-products; to investigate the use of an FPH and HA mixture for shrimp feed at the period of 20-55 days old. | MINISTRY OF EDUCATION AND TRAINING NHA TRANG UNIVERSITY PHAM VIET NAM RECOVERY OF PROTEIN HYDROLYSATE AND HYDROXYAPATITE FROM TRAFISH BY- PRODUCTS AND THEIR ORIENTED APPLICATION FOR PACIFIC WHITE SHRIMP FEED Major Aquatic Product Processing Technology Code 9540105 SUMMARY OF THESIS KHANH HOA - 2021 MINISTRY OF EDUCATION AND TRAINING NHA TRANG UNIVERSITY PHAM VIET NAM RECOVERY OF PROTEIN HYDROLYSATE AND HYDROXYAPATITE FROM TRAFISH BY- PRODUCTS AND THEIR ORIENTED APPLICATION FOR PACIFIC WHITE SHRIMP FEED Major Aquatic Product Processing Technology Code 9540105 Supervisors Asoc. Prof. Dr. TRANG SY TRUNG Asoc. Prof. Dr. NGUYEN VAN HOA SUMMARY OF THESIS KHANH HOA - 2021 NOVELTIES OF THE THESIS Title Recovery of protein hydrolysate and hydroxyapatite from catfish by-products and their oriented application for Pacific white shrimp feed. Major Seafood Processing Code Course 2015 - 2019 Technology. 9540105 Student Pham Viet Nam Supervisors 1. Assoc. Dr. Trang Si Trung 2. Assoc. Dr. Nguyen Van Hoa Institution Nha Trang University The novelties of the thesis 1. The data on the chemical composition of catfish by-products Pangasius hypophthalmus collected at Nam Viet Seafood Processing Company An Giang province was reported which can be used in further studies. 2. A process was presented to recover three value-added products including fish protein hydrolysate FPH hydroxyapatite HA and crude lipid from catfish by-products. Using alcalase the FPH had a DH of 35 with gt 70 MW of lt 1000 Da a nitrogen total of 11.7 a lipid total of 10.8 . Using both alcalase and lipase the FPH had a nitrogen total of 33.2 a lipid total of 1.93 and an acid amine total of 420.16 mg g protein. The best conditions for the preparation of HA from the fishbone were reported. The prepared HA had a size of 50 70 nm a Ca P ratio of 1.83 a surface area of 2.87 m2 g a pore volume of 0.02 m3 g a pore size of 1.2 nm and an absence of heavy metals. This is a novel approach to obtain maximum components from .