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Food-safety concerns, reducing decay and extending storage life without the dependency of chemicals have increased the demand for safe, proven alternatives such as ozone. With Purfresh’s cold storage solution for pome fruit, packers and processors are able to extend product life, decrease decay and enhance food safety practices naturally.
SCIENCE-BASED SOLUTION
Purfresh’s science-based ozone cold storage solution provides a safe and proven alternative for pome fruit packers and processors. Purfresh’s cold storage solution effectively distributes gaseous ozone in the air to kill airborne and surface microorganisms. The solution naturally shuts down the sporulation process and controls ripening by consuming ethylene in storage facilities.
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.


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Reduce decay
- Kill surface and airborne microorganisms
- Stop nesting of decay in stored bins
Control ethylene levels in storage rooms
- Maintain fruit pressure
- Increase storage and shelf life
- Gain options in market timing
USDA and FDA approved
Certified organic
“In compliance with certified organic practices, we’re utilizing Purfresh’s cold storage solution to maintain product quality, extend shelf life, and reduce microbial decay and spoilage.”
—Cuyama Orchards
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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 |

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