Quick Answer
No, you don't need oxygen absorbers for long-term storage of non-perishable items like grains, nuts, and seeds, but they're recommended for items that contain fatty acids, like oil, coffee, and chocolate.
Understanding Storage Requirements
When storing non-perishable items for a year or more, the primary concern is moisture and pests. Oxygen levels, however, are less of an issue. Non-perishable food items typically have a low water content and don’t require oxygen-absorbing materials. However, items that contain fatty acids, like oil and chocolate, can go rancid if exposed to oxygen, making oxygen absorbers a useful addition.
Using Oxygen Absorbers Effectively
Oxygen absorbers are most effective when used in sealed containers or Mylar bags. A typical oxygen absorber packet can remove up to 6 grams of oxygen, enough to protect a 1-gallon container of food for about 6 months. For longer-term storage, you can use multiple packets or consider using a desiccant with a silica gel component. It’s essential to follow the manufacturer’s instructions for the number of packets to use and the recommended storage time.
Storing Perishable Items Without Oxygen Absorbers
For perishable items like grains and seeds, you can store them in airtight containers in a cool, dry place. Store them in a 5-gallon bucket or a large Mylar bag, and consider adding a desiccant to control moisture levels. A general rule of thumb is to store grains at 5% moisture levels or less to prevent mold and pest infestations.
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