{"id":28167,"date":"2025-10-21T17:57:24","date_gmt":"2025-10-21T14:27:24","guid":{"rendered":"https:\/\/broudat-kar.com\/lang\/?p=28167"},"modified":"2026-01-31T12:44:12","modified_gmt":"2026-01-31T09:14:12","slug":"onion-cold-storage-2","status":"publish","type":"post","link":"https:\/\/broudat-kar.com\/lang\/en\/onion-cold-storage-2\/","title":{"rendered":"Onion cold storage"},"content":{"rendered":"\t\t
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Onion cold storage<\/h1>

Onion cold storage is regarded as the best method for the long-term preservation of this product. In the past, using traditional methods such as drying the onions and storing them in a basement or dark warehouse, the onions could be kept for a short period after harvest; however, these methods ultimately resulted in the spoilage of 40\u201380 percent of the onions.<\/p>

\"\"<\/a>At present, by using onion cold storage, this product can be kept intact for up to 9 months; however, due to onions\u2019 high sensitivity to improper humidity and temperature, they are among the highest-risk products for long-term storage. For this reason, strict attention must be paid to the standards for the design and implementation<\/strong> of onion cold storage facilities.<\/p>

Types of Onion Cold Storage<\/h2>

The temperature and humidity of an onion cold storage vary depending on the onion type; therefore, each type of onion requires a cold room with different conditions. For example, green onions, sweet onions, and others must each be stored in a cold room<\/strong> suited to their specific standards. Below, we examine the types of onion cold storage based on their functions.<\/p>

Onion Processing and Preparation Cold Storage<\/h3>

One type of onion cold storage is the onion processing cold room. Since onions cannot be placed in cold storage immediately after harvest, they must be processed or prepared before entering the cold room; this work is carried out in the processing cold room.<\/p>

In this facility, onions are dried for several days (under ideal conditions<\/strong> with proper ventilation, surface drying typically takes 7 to 10 days<\/strong>) to prepare them for long-term storage in the cold room. For this purpose, the onions should not be cooled rapidly; rather, their temperature should be reduced gradually\u2014by up to 0.5 \u00b0C per day\u2014until it reaches the standard storage temperature in the cold room.<\/p>

It is worth noting that ventilation plays a very important role in onion storage; therefore, appropriate equipment for air circulation must be used in the cold room. After storage, onions are not shipped directly from the cold room to market; instead, they are warmed under controlled conditions to prevent moisture condensation.<\/p>

Onion Storage Cold Room<\/h3>

After the onions have been processed, they are stored in a cold room. In this type of facility, specific temperature and humidity conditions are set according to the onion variety. For example, dry, pungent onions should be kept at 0 \u00b0C with 65\u201375% relative humidity. The storage conditions in these cold rooms are adjusted in such a way as to prevent sprouting, decay, and discoloration.<\/p>

Advantages of Onion Cold Storage<\/h2>

What are the advantages of using onion cold storage for producers?<\/p>