Efficiency of slow pasteurization of goat milk in the different time/temperature binomials

  • Quelson Prestes COSTA Secretaria de Estado da Saúde
  • Bruna Samara dos Santos REKOWSKY
  • Marion Pereira COSTA Secretaria de Estado da Saúde
  • Nelson de Carvalho DELFIN
Keywords: alkaline phosphatase, lactoperoxidase, mesophiles, coliforms, pasteurization, goat milk.

Abstract

The objective of this study was to investigate an alternative time-temperature binomial to be used in the slow pasteurization on the alkaline phosphatase inactivation in the goat milk. Its efficiency was demonstrated with the standard counting in plates, and also refrigerated and the frozen milks processing were compared. Eighteen treatments were used in the raw goat milk (nine refrigerated milk and nine frozen milk). They were packed in 300 mL-flasks, pasteurized at 60-63-65°C for 10, 20, 30 minutes, and then tested for alkaline phosphatase and peroxidase enzymes. The standard counts in plates (CPP) and coliforms at 35°C and 45°C were performed in the raw samples and in the every treatment, in duplicate. After the pasteurization process, all of the treatments showed: no growth of mesophilic microorganisms, coliforms with <0.3 MPN / mL, negative phosphatase and positive peroxidase tests. The pasteurization was efficient to improve the microbiological quality of the milk either refrigerated or frozen. All of the evaluated binomials presented satisfactory results to reach the recommended parameters preconized in the legislation, suggesting the smaller binomial (60°C for 10 min). There was no difference between the samples storage form, either refrigerated or frozen.  

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Published
2019-03-29
How to Cite
Prestes COSTA, Q., Samara dos Santos REKOWSKY, B., Pereira COSTA, M., & de Carvalho DELFIN, N. (2019). Efficiency of slow pasteurization of goat milk in the different time/temperature binomials . Revista Do Instituto Adolfo Lutz, 78(1), 1-7. https://doi.org/10.18241/rial.v78i1.34236
Section
ORIGINAL ARTICLE