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Ozone for cold storage

Cold storage with ozone

Ozone (O₃) is used in cold storage settings primarily for its disinfecting and preservation properties.

Ozone for disinfection

  • Elimination of pathogens: Ozone is a powerful oxidizing agent that can kill bacteria, viruses, fungi, and other microorganisms. In cold storage, this helps in maintaining a pathogen-free environment, which is crucial for storing food products like fruits, vegetables, meats, and dairy.
  • Mold and odor control: Ozone can also break down mold spores and reduce or eliminate odors caused by spoilage, thus extending the quality of stored goods.

Preserve the products

  • Ethylene reduction: Many fruits and vegetables produce ethylene as they ripen, which can accelerate spoilage. Ozone can react with ethylene, reducing its concentration in the storage atmosphere, thereby slowing down the ripening process and prolonging shelf life.
  • Insect control: Ozone can be used as a non-chemical alternative to traditional fumigants for controlling insects in stored grains or other dry goods without leaving residues.

How ozone is applied ?

  • With ozone generators: These devices are installed in the cold storage units where they generate ozone from oxygen in the air or from an oxygen supply. The ozone concentration in the storage area needs to be carefully controlled to ensure effectiveness without harming the stored products.
  • Timing and concentration: Typically, ozone is applied in controlled doses either continuously at low levels or intermittently at higher levels, especially when the storage area is emptied for cleaning or when new produce is added.

Benefits of ozone for cold storage

  • Reduced chemical use: By using ozone for sanitation, there’s less need for chemical preservatives or pesticides, which can be beneficial for organic produce or for reducing chemical residues.
  • Environmentally friendly: Ozone decomposes back into oxygen, leaving no harmful residues, making it an environmentally friendly option for cold storage.

In summary, ozone use in cold storage leverages its strong oxidizing properties to enhance food safety, extend shelf life, and reduce dependency on chemical treatments, all while being mindful of safety and regulatory guidelines.