Abstract
This study was carried out to reduce <i>Byssochlamys fulva</i> PTCC 5062 in lime juice. The main and interaction effects of pH (3.5 and 4.5) and voltage gradient (15 and 20 V/cm) were investigated on mold inactivation during ohmic heating at 88, 93, and 98°C. The results showed that pH and voltage gradient had significant effects on D<sub>value</sub> and Z<sub>value</sub> (p<0.01). In order to model the survival behavior of <i>Byssochlamys fulva PTCC 5062</i>, due to the nonlinearity of the curves, Weibull model was found to give more accurate estimation compared to classical first-order model. The results of D<sub>value</sub> showed that like conventional method, the temperature is the most influential factor affecting the reduction of this heat-resistant mold. It has also been demonstrated that at lower pH and higher voltage gradient, <i>Byssochlamys fulva</i> PTCC 5062 is more sensitive to temperature. This study showed that the highest inactivation rate of this mold was achieved at 98°C, 20 V/cm and pH=3.5.
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