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Freeze Drying vs. REV ™

Why wait hours to freeze-dry a product when you can get a better quality product in a few hours? Go from fresh to dry faster with REV™ vacuum microwave dehydration only from EnWave.

Freeze Drying Takes Days, REV™ Takes Minutes

Traditional freeze drying cycles can last up to 72 hours. With REV™ technology, products can dry in as little as 30 minutes, with most cycles finishing in 90 minutes or less. Unlike freeze drying, REV™ does not require piercing the skins of non-porous fruits and vegetables, helping maintain product integrity and appearance.

Consistent Drying with Moisture Control

Freeze drying removes water through sublimation which slowly dry from surface to the inside, but REV™ drying works from the inside out for even, volumetric results. This allows precise moisture control, ensuring consistency throughout the product. With REV™, you can also create textures that range from chewy to crunchy — a flexibility that freeze drying can’t offer. For best results with many fruits and vegetables, REV™ can be paired with air drying pre-treatments.

See the tables below to learn more.

Preserve Natural Colours, Flavours, and Nutrients

Freeze drying is a lengthy and intensive process which can impact sensitive components. REV™ drying occurs under vacuum at a pressure where water boils at just 25° C. Unless higher heat is intentionally applied, the process stays gentle enough to protect delicate cell structures. The result: products that retain their natural colours, authentic flavours, and valuable nutrients, often better than with freeze drying.

TECH
TIME
TYPE
COLOUR
DELIVERY
MOISTURE

Freeze Drying

Vacuum, Heated Trays
20 – 48 Hours
Batch
Bleached Look
Rack for Trays
Variable from 4% to 1%

REV™ Drying

Vacuum Microwave
30 – 90 Minutes
Batch or Continuous
Near Natural
Conveyor for Trays or Rotating Drums
Uniform at any percentage between 20% to 1%
TECH
TIME
TYPE
COLOUR
DELIVERY
MOISTURE

Freeze Drying

Vacuum, Heated Trays
20 – 48 Hours
Batch
Bleached Look
Rack for Trays
Variable from 4% to 1%

REV™ Drying

Vacuum Microwave
30 – 90 Minutes
Batch or Continuous
Near Natural
Conveyor for Trays or Rotating Drums
Uniform at any percentage between 20% to 1%

Freeze Dried vs. REV™ Dried Pineapple

Drying Method

التجفيف بالهواء
Air Drying + REV™ Drying
Freeze Drying

Drying Time

10 – 18 hours
2 – 3 hours
24 – 48 hours
التجفيف بالهواء
Air Drying + REV™ Drying
Freeze Drying

Ascorbic Acid Retention

188 mg/100gr
325 mg/100gr
367 mg/100gr

Antioxidant Activity

µmol Trolox Equivalent /g solid

التجفيف بالهواء
Air Drying + REV™ Drying
Freeze Drying

ORAC

63 µmol
62 µmol
62 µmol

ABTS

12 µmol
18 µmol
17 µmol

See the Better Alternative to Freeze Drying in Action

EnWave offers product trials at our Canadian pilot plant facility. Work with our team of experts, access our library of proven REV™ drying protocols, and leave with samples to evaluate. Contact us to learn more about our product development packages and see how REV™ compares directly to freeze drying.

Get Started – Book a call today!

See the Better Alternative to Freeze Drying in Action

Freeze Dry vs. REV™ – Pineapples Wedges

Drying Time (hours)
Moisture (%)
Density (G/ml)
Antioxidant Activity
(μmol Trolox Equivalent / g solid) / ABTS
Vitamin C Retention (%)

التجفيف بالهواء

10 – 18 hours
<5%
1.12
12
77%

Freeze Drying

24 – 48 hours
<3%
0.15
17
100%

Air Dry + REV™ Dry

2 – 3 hours
<3%
0.36
18
91%
Drying Time (hours)
Moisture (%)
Density (G/ml)
Antioxidant Activity
(μmol Trolox Equivalent / g solid) / ABTS
Vitamin C Retention (%)

التجفيف بالهواء

10 – 18 hours
<5%
1.12
12
77%

Freeze Drying

24 – 48 hours
<3%
0.15
17
100%

Air Dry + REV™ Dry

2 – 3 hours
<3%
0.36
18
91%

Freeze Dry vs. REV™ – Strawberries Halves

Drying Time (hours)
Moisture (%)
Density (G/ml)
Antioxidant Activity
(μmol Trolox Equivalent / g solid) / ABTS
Vitamin C Retention (%)

التجفيف بالهواء

10 – 18 hours
<5%
0.96
77
25%

Freeze Drying

24 – 48 hours
<3%
0.11
135
90%

Air Dry + REV™ Dry

2 – 3 hours
<3%
0.4
101
80%
Drying Time (hours)
Moisture (%)
Density (G/ml)
Antioxidant Activity
(μmol Trolox Equivalent / g solid) / ABTS
Vitamin C Retention (%)

التجفيف بالهواء

10 – 18 hours
<5%
0.96
77
25%

Freeze Drying

24 – 48 hours
<3%
0.11
135
90%

Air Dry + REV™ Dry

2 – 3 hours
<3%
0.4
101
80%

Freeze Dry vs. REV™ – Blueberries

Drying Time (hours)
Moisture (%)
Density (G/ml)
Antioxidant Activity
(μmol Trolox Equivalent / g solid) / ABTS
Vitamin C Retention (%)

التجفيف بالهواء

10 – 18 hours
<5%
1.1
102
26.07%

Freeze Drying

24 – 48 hours
<3%
0.3
133
84.49%

Air Dry + REV™ Dry

2 – 3 hours
<3%
0.4
102
79.26%
Drying Time (hours)
Moisture (%)
Density (G/ml)
Antioxidant Activity
(μmol Trolox Equivalent / g solid) / ABTS
Vitamin C Retention (%)

التجفيف بالهواء

10 – 18 hours
<5%
1.1
102
26.07%

Freeze Drying

24 – 48 hours
<3%
0.3
133
84.49%

Air Dry + REV™ Dry

2 – 3 hours
<3%
0.4
102
79.26%

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