Effect of High Pressure Low Temperature Treatment on the Inactivation of Microorganism in Raw Milk

  • Kim, Jee-Yeon (Department of Food Science and Biotechnology of Animal Resources, Konkuk University) ;
  • Hong, Geun-Pyo (Department of Food Science and Biotechnology of Animal Resources, Konkuk University) ;
  • Park, Sung-Hee (Department of Food Science and Biotechnology of Animal Resources, Konkuk University) ;
  • Kim, Jeong-Mee (Department of Food Science and Biotechnology of Animal Resources, Konkuk University) ;
  • Min, Sang-Gi (Department of Food Science and Biotechnology of Animal Resources, Konkuk University)
  • Published : 2006.05.26

Abstract

This study was carried out to investigate the effect of HPLT on the inactivation rates of microorganisms in raw milk depending on the pressurization time and temperature. Raw milk samples were submitted to HPLT of 200 MPa at -4, 4, 12 and $20^{\circ}C$, respectively. Inactivation increased with pressurization time and HPLT of microorganisms at 200 MPa was time dependent at any temperature. At sub-zero temperature of $-4^{\circ}C$, high pressure pasteurization was the most effective in inactivating microorganisms.

Keywords