Quick Answer
A desiccant can be used in conjunction with oxygen absorbers for optimal grain storage, but it's not strictly necessary. Desiccants help control humidity, while oxygen absorbers eliminate moisture from the air, which can still cause grain damage.
When to Use a Desiccant with Oxygen Absorbers
When storing grains for extended periods, controlling both humidity and oxygen levels is crucial. Desiccants are effective for managing humidity, especially in environments with high moisture levels. They can absorb up to 40% of their weight in moisture, depending on the type. For example, silica gel desiccants can absorb up to 7.5 times their dry weight in moisture.
Choosing the Right Desiccant for Grain Storage
The type and quantity of desiccant needed will depend on the storage environment and grain type. A general rule of thumb is to use 1-2 pounds of silica gel per 1,000 pounds of grain. Other types of desiccants, such as calcium chloride or activated alumina, may be more suitable for specific grain types or environments. It’s essential to monitor the desiccant’s effectiveness and replace it as needed to maintain optimal humidity levels.
Combining Desiccants with Oxygen Absorbers
In areas with high humidity, using both desiccants and oxygen absorbers can provide a more comprehensive storage solution. Oxygen absorbers can eliminate moisture from the air, reducing the risk of mold and insect infestations. When combining desiccants and oxygen absorbers, it’s crucial to monitor the storage environment closely to prevent over-drying or excessive moisture levels. A general guideline is to use 1-2 ounces of oxygen absorbers per 1,000 pounds of grain, in addition to the desiccant.
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