High Pressure Destruction Kinetics Of Clostridium Sporogenes Spores In Salmon Slurry At Elevated Temperatures

Salmon slurry containing C. sporogenes spores was subjected to high pressure (HP) treatments (700-900 MPa; 80-100 degrees C, and 0-24 min). Destruction rates (D value) and pressure/temperature sensitivity parameters (Z(P) and Z(T)) were evaluated. Thermal treatment D values were an order of magnitude higher than those under HP. Higher pressures and temperatures accelerated the spore destruction rates. Z(P) values were 14.5, 17.3 and 15.5 degrees C at 700, 800 and 900 MPa respectively, while Z(T) values (at constant temperature) were 440, 540, 550 MPa at 80, 90, and 100 degrees C, respectively. The z value under thermal treatment was 8.8 degrees C. The spores were relatively more sensitive to temperature than to pressure.