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Bean storage and freshness management
The ideal storage temperature for kidney beans is between 8°C and 10°C. If the temperature is too low, they are prone to freezing damage. The initial signs of spoilage include rust-like dents on the surface, followed by water-soaked patches and eventual rotting. For optimal preservation, the atmosphere inside the storage should contain 2% to 3% oxygen and less than 10% carbon dioxide. There are several common storage methods used to maintain quality and extend shelf life.
1. **Cooling and Storage Method**: First, clean the soybean meal thoroughly. Then, blanch it in boiling water at 100°C for about two minutes. After removing it from the heat, immediately cool it in cold water until it reaches room temperature. Drain the excess water and place the beans into a plastic bag. Make sure to remove as much air as possible from the bag before sealing it. Place the sealed bag in a freezer set to -25°C for quick freezing. Once fully frozen, transfer the bags to a refrigerator or storage unit maintained at -18°C for long-term preservation. This method typically allows for storage of up to six months to one year.
2. **Small Package Storage Method**: Pack the beans into polyethylene plastic bags with a thickness of 0.1 mm, using 5 kg per bag. Seal the bags tightly and add 0.5 to 1 kg of slaked lime inside each bag to help absorb moisture. Store the bags in a warehouse and treat them with 0.01 ml/l of sec-butylamine for fumigation and preservation. Maintain the storage temperature between 8°C and 10°C, and inspect each bag every 10 to 14 days to ensure no signs of spoilage. This method is suitable for short-term storage, generally lasting up to 30 days.
These methods help maintain the quality and nutritional value of kidney beans during storage. Choosing the right technique depends on the available resources, storage conditions, and intended duration of storage. It's important to monitor the stored beans regularly to prevent any potential damage or contamination.
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Bean storage and freshness management