Table 2.
Particle size distribution parameters for concentrated skim milk solutions at 30% w/w total solids after 90 min of recirculation in the fouling rig at 85 °C. The unheated control was not subjected to heat treatment on the fouling rig.
| Sample | D[2,3] | D[3,4] | Dv(10) | Dv(50) | Dv(90) | Span |
|---|---|---|---|---|---|---|
| (µm) | ||||||
| Unheated Control | 0.05 ± 0.00 a | 0.24 ± 0.09 a | 0.02 ± 0.00 a | 0.08 ± 0.00 a | 0.26 ± 0.02 a | 3.06 ± 0.18 a |
| pH 6.1 | 0.46 ± 0.01 b | 17.6 ± 7.68 b | 0.19 ± 0.00 b | 0.65 ± 0.05 b | 25.2 ± 5.88 b | 38.5 ± 6.41 b |
| pH 6.3 | 0.07 ± 0.01 a | 2.96 ± 0.62 c | 0.03 ± 0.00 a | 0.13 ± 0.00 a | 0.94 ± 0.13 a | 7.26 ± 0.94 c |
| pH 6.5 | 0.06 ± 0.00 a | 0.19 ± 0.06 a | 0.03 ± 0.00 a | 0.09 ± 0.00 a | 0.31 ± 0.01 a | 3.19 ± 0.11 a |
| pH 6.7 | 0.06 ± 0.00 a | 0.18 ± 0.03 a | 0.02 ± 0.00 a | 0.09 ± 0.00 a | 0.29 ± 0.01 a | 3.16 ± 0.07 a |
Results are the means of data from two independent trials. Mean values within a column not sharing a common superscript letter differ significantly (p < 0.05). D[3,4] = volume-weighted mean particle diameter; D[2,3] = surface-weighted mean particle diameter; Dv(10) = particle size below which 10% of sample volume is found; Dv(50) = particle size below which 50% of sample volume is found; Dv(90) = particle size below which 90% of sample volume is found.