Clean Solutions for Food and Water

Purfresh Cold Storage Watch Video

Cold Storage Grapes

Eliminate Botrytis Rot, maintain quality, and extend storage life

Grapes in storage are susceptible to decay, particularly Botrytis Rot, from airborne and surface microorganisms that are often present in high humidity storage facilities. With Purfresh’s cold storage solution, packers and processors are able to extend product life and marketability by decreasing decay losses naturally. Ozone can be used as a complementary measure with various post-harvest techniques.

Cheries

SCIENCE-BASED SOLUTION
Purfresh’s patented science-based cold storage solution generates ozone from the oxygen in the air on-site and delivers defined, low-dose specific concentrations of gaseous ozone into the atmosphere, for use as a powerful but safe disinfectant. The solution kills airborne and surface microorganisms and effectively controls Botrytis. After killing decay causing microorganisms, ozone immediately reverts to pure oxygen, leaving no residue and maintaining product taste, color, texture and smell characteristics in its natural state.

OPTIMUM SAFETY AND EFFICACY
Purfresh’s unique closed-loop concentration control and remote monitoring capabilities provide optimum safety and efficacy. Its measurement sensors and on-board computer maintains ozone concentrations to within +/- 10 ppb of a desired set point. The solution includes fail-safe ambient air sensors, which constantly ensure work areas maintain ozone concentrations well within OSHA standards. Its remote monitoring service constantly tracks system performance and provides detailed reports and automated alerts.

TABLE GRAPE TEST SHOWS REDUCTION IN INFECTION

Tomatoes

 

Key Facts

Reduce and control decay

  • Eliminate Botrytis Rot
  • Kill surface and airborne microorganisms
  • Stop nesting of decay in stored bins

Reduce/eliminate post-harvest chemicals

Reduce post-harvest fungicides

  • Ideal for organic and conventional
    Increase storage and shelf life
  • Maintain stem quality and color

USDA and FDA approved

Certified organic

Success Story

Problem

  • Botrytis Rot
  • SO2 Usage

Solution

  • Purfresh Cold Storage
    Results
  • Reduced Botrytis Rot
  • Eliminated spread of surface and airborne microorganisms
  • Improved product quality including greener stems
  • Increased shelf life by several weeks

“With the deployment of Purfresh’s ozone-based cold storage solution, we’ve materially enhanced storage life of grapes, kiwifruit and Asian pears.”

— Kool Kountry

 

COMPARE THE VALUE

 

SULFUR DIOXIDE

SULFUR DIOXIDE & OZONE

OZONE

Typical Storage Periods

 8 - 12 weeks

12+ weeks

12+ weeks

Corrosiveness

Very high

Ozone water scrubbing reduces SO2 damage

Minimal at monitored levels

Residue on Fruit

White spots

Ozone air minimizes SO2 spots

No

Taste

Flavors reduced by SO2

Flavors may improve with less SO2

Natural flavors maintained

Dosage and Mold Spore Control

Because of toxicity, SO2 is normally applied once a week

Ozone is applied continuously - controlling mold constantly

Ozone is applied continuously - controlling mold constantly

Regulatory Compliance

Restricted emissions and detailed recordkeeping

Ozone reduces SO2 levels

No recordkeeping w/EPA

Organically Approved

No

No

Yes

 

EXAMPLE SYSTEM

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