Table 1.
Parameters (b and n), total time for complete inactivation (t6.8; 6.8 log-cycle reduction) and goodness of fit by using the Weibull model for thermal, SC-CO2 and SC-CO2 + HPU inactivation kinetics of A. niger in oil-in-water emulsions under different pressure and temperature conditions. Values in brackets indicate standard errors.
| Treatment | Temperature (°C) | Pressure (bar) | b (min–n) | n | t6.8 (min) | R2 | RMSE |
|---|---|---|---|---|---|---|---|
| Thermal | 50 | – | 0.01 (0.002) | 0.73 (0.06) | 7588.4 | 0.99 | 0.006 |
| Thermal | 60 | – | 5.60 (0.18) | 0.06 (0.01) | 25.4 | 0.99 | 0.059 |
| Thermal | 70 | – | 3.77 (0.88) | 0.52 (0.26) | 3.1 | 0.80 | 1.079 |
| SC-CO2 | 50 | 100 | 0.08 (0.01 | 1.04 (0.04) | 71.6 | 0.99 | 0.064 |
| SC-CO2 | 50 | 350 | 0.29 (0.10) | 0.82 (0.10) | 46.9 | 0.97 | 0.199 |
| SC-CO2 | 60 | 100 | 5.25 (0.03) | 0.07 (0.002) | 40.3 | 0.99 | 0.006 |
| SC-CO2 | 60 | 350 | 5.24 (0.004) | 0.12 (0.0004) | 8.8 | 0.99 | 0.003 |
| SC-CO2 + HPU | 50 | 100 | 0.82 (0.33) | 0.52 (0.11) | 58.4 | 0.98 | 0.246 |
| SC-CO2 + HPU | 50 | 350 | 0.39 (0.19) | 0.75 (0.13) | 45.2 | 0.98 | 0.301 |
| SC-CO2 + HPU | 60 | 100 | 4.77 (0.39) | 0.11 (0.33) | 25.1 | 0.99 | 0.089 |
| SC-CO2 + HPU | 60 | 350 | 6.17 (0.23) | 0.04 (0.02) | 11.4 | 0.99 | 0.119 |
| SC-CO2 + HPU | 70 | 100 | 5.48 (0.17) | 0.18 (0.03) | 3.3 | 0.98 | 0.313 |
| SC-CO2 + HPU | 70 | 350 | * | * | * | * | * |
| SC-CO2 + HPU | 70 | 550 | * | * | * | * | * |
* Not enough experimental data for model fitting.