Onion storage

Insulated and insulated onion warehouses for energy-efficient and economical operation.

 

Onion storage - energy-efficient, sustainable and reliable. Insulated and insulated onion storage for economical and reliable quality preservation.

Whether fresh air storage, refrigerated storage with large crates or loose bulk storage - we support you with your construction project and create a customized solution. Ensuring efficient operation throughout the entire service life of your onion warehouse is a matter of course for us. We achieve this through a comprehensive partnership approach. The working methods and operating procedures play just as important a role as the local conditions for your onion storage facility.

For the long-term storage of onions, we are happy to help with the implementation and realization of ULO onion warehouses. The sealed and cooled rooms make it possible to change and regulate the atmosphere inside the storage units to reduce the oxygen content. These are mainly used for crate storage. Depending on the ventilation system in the onion store, crates with closed or slotted side walls are used.

Depending on the correct storage temperature, suitable onion storage can lead to a storage period of 6 to 8 months for varieties that store well.

Short-term storage of onions, such as fresh air storage, is cooled with outside air using movable flaps. The option of mixed air ducts allows the volume ratios between outside air and room air to be controlled.

Talk to us about your project and let us work together to find the right solution for you.

Frequently asked questions

  • Are there differences in onion storage for different onion varieties?

    Yes, there are differences in the storage of different onion varieties, and different onion varieties have different properties and therefore different requirements in terms of temperature, humidity or susceptibility to certain storage diseases. Special storage conditions are required in particular:

    • Onion sets (seed):
      They are stored after the early harvest (approx. June/July) and removed from storage for planting in spring. In the case of loose storage, the mound should only be up to 2 m high. Heat treatment is required before planting, between 5 and 18 weeks at 25 to 28° C, depending on the onion variety and diameter.
    • Spring onions:
      The storage life of spring onions is considerably shorter than that of dried onions. Due to the more intensive respiration of this type of onion, refrigerated storage is only possible for 1 to 3 weeks. CA onion storage facilities allow a shelf life of 6 to 8 weeks.
    • Shallots:
      Shallots should be stored in crates due to the high storage density. It must be ensured that sufficient air movement reaches the bulbs.
      The relatively dry refrigeration enables a shelf life of 2 to 9 months in onion storage - depending on the variety.

  • What does the storage technology in the onion warehouse depend on?

    The storage technology in the onion warehouse depends largely on the onion variety and the marketing size.
    The customer-specific requirements for the storage duration of the onions, storage capacities and organization are also decisive factors that need to be taken into account.

  • Do you only do the planning or also the construction?

    Plattenhardt + Wirth is a construction company that specializes in the planning and construction of onion warehouses. Our expertise lies in the individual consideration of our customers' ideas and wishes in order to develop customized solutions.

    We ensure a smooth and efficient operational process by designing the planning in the early project phase. The fulfillment of customer requirements for an economical and long-lasting construction project is our priority.

  • Why build an onion warehouse with Plattenhardt + Wirth?

    At Plattenhardt + Wirth, we are your ideal partner for potato storage. Our many years of experience and expertise make us a trustworthy and competent partner in the industry.

    One of our greatest advantages is our high quality and experience. We attach great importance to first-class materials and precise, professional construction for every onion storage facility. This ensures that your onion warehouse meets the highest standards and is durable.

    Another advantage is our efficiency in the construction of onion warehouses. We handle the project from A to Z, guarantee adherence to deadlines and monitor every step of the construction process. This allows you to concentrate fully on your core business while we take care of the smooth construction of your warehouse.

  • What types of onion storage do you offer?

    We offer all common storage methods, from bulk storage to crate storage or cold storage. Our expertise in the construction of CA or ULO onion warehouses is complemented by our in-house door production, which guarantees the necessary tightness. As we specialize in the construction of onion storage systems, technical equipment can be installed by the customer independently of the manufacturer or ordered directly.