Effect of Hot-Water Blanching Pretreatment on Drying Characteristics and Product Qualities for the Novel Integrated Freeze-Drying of Apple Slices

Figure 8

Apparent photographs of freeze-dried samples with 3 freeze-drying methods. (a) VF-FD; (b) HWB-VF-FD; (c) HWB-PF-FD. VF-FD: apple samples without hot-water pretreatment were performed with vacuum freezing treatment and freeze-drying process; HWB-VF-FD: apple samples with hot-water pretreatment were performed with vacuum freezing treatment and freeze-drying process; HWB-PF-FD: apple samples with hot-water pretreatment were performed with plate freezing treatment and freeze-drying process.

(a)

(b)

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