High pressure homogenization vs heat treatment: Safety and functional properties of liquid whole egg

This research investigated the potential of multi-pass homogenization treatment for the inactivation of Salmonella enterica serovar Enteritidis inoculated at different levels in liquid whole egg (LWE) comparing the efficacy of this treatment with a traditional thermal one performed at 65 °C. Moreover, the effects of high pressure treatment (HPH) on structural and functional properties such as viscosity, microstructure and foaming abilities of LWE were investigated. The data obtained suggested that the multi-pass high pressure treatment at 100 MPa of S. enterica serovar Enteritidis inoculated in LWE at 7 and 4 log CFU/ml resulted in a first order inactivation kinetic, while the thermal inactivation curves of S. enterica serovar Enteritidis inoculated at 8 and 4 log CFU/ml presented a non-linear behaviour, with a marked tail after 3 min of treatment at 65 °C. Additionally, HPH treatment caused an increase in foaming capacity of LWE, with respect to the untreated samples, passing from values of 26% of the control to 50% of pressure treated samples. •HPH treatment at 100 MPa resulted in a first order Salmonella Enteritidis inactivation in LWE.•5 cycles of HPH treatment at 100 MPa resulted in a 5-log CFU inactivation of S. Enteritidis.•65 °C/3 min curves were non-linear in LWE.•HPH treatment at 100 MPa increased foaming ability and stability of LWE.