A Preliminary Assessment of HTST Processing on Donkey Milk

Veterinary Sciences

卷:4

Alessandra Coscia¹  Enrico Bertino¹  Sara Antoniazzi²  Laura Cavallarin²  Marzia Giribaldi³  Gian Marco Gariglio⁴ 

[1] Città della Salute e della Scienza—Struttura Complessa di Neonatologia, 10125 Torino, Italy;

[2] Consiglio Nazionale delle Ricerche—Istituto di Scienze delle Produzioni Alimentari, 10095 Grugliasco (To), Italy;

[3] Consiglio per la Ricerca in Agricoltura e L’analisi Dell’economia Agraria—Centro di Ricerca in Ingegneria e Trasformazioni Agroalimentari, 10135 Torino, Italy;

[4] Giada S.a.s., 10068 Villafranca P.te (To), Italy;

关键词: donkey milk;    holder;    HTST;    casein;    lysozyme;    pasteurization;   

DOI  :  10.3390/vetsci4040050

来源: DOAJ

【 摘 要 】

Due to increasing attention from consumers on non-bovine milk types, and to the increase in the number of small dairy donkey farms in Italy, farmers require more advanced and reliable processing devices, in order to guarantee a safe product of high quality. To this aim, a new small-scale High-Temperature Short-Time (HTST) pasteurizer (72 °C for 15 s), prototyped by the authors, was tested on donkey milk. The efficacy of the HTST device was tested on raw donkey milk microflora by enumeration of total aerobic bacteria, Enterobacteriaceae and Bacillus cereus. The biochemical quality was assessed by determining the protein profile by monodimensional electrophoresis and by measuring lysozyme activity. The HTST apparatus was able to reduce the total bacteria count, and to completely eradicate Enterobacteriaceae. Bacillus cereus, when present, was decreased with low efficiency. Changes in the protein profile were observed in milk pasteurized in accordance with both processes, although HTST seemed to limit casein degradation. Lysozyme activity was not substantially affected in comparison to raw donkey milk. In conclusion, a tailored small-volume HTST device could be safely applied to pasteurize donkey milk in on-farm pasteurization processes on small dairy donkey farms.

【 授权许可】

Unknown