Can fresh beans be vacuum stored

Fresh beans can be vacuum stored, which can effectively extend the shelf life and reduce nutrient loss. Vacuum preservation mainly inhibits microbial activity by isolating oxygen, making it suitable for short-term storage or pre-treatment before freezing.

When storing fresh green beans in vacuum, the surface moisture should be treated first to avoid residual water vapor causing mold growth. Choose fresh and spot free beans, wash them, blanch them in water for 30 seconds to 1 minute to kill surface bacteria, cool and dry them, and then put them in a vacuum bag. Vacuum pumping and refrigeration can maintain freshness for 5-7 days, while freezing can last for more than 3 months. After thawing, the taste is slightly soft but still suitable for stewing. Please note that the vacuum bag should be made of food grade material and avoid using sharp tools to puncture the sealing layer. If the beans have already rotted or moldy spots, they should not be stored under vacuum, as spoilage bacteria may continue to reproduce in an anaerobic environment. The beans that have not been thoroughly dried are prone to condensation water after vacuum treatment, which accelerates spoilage. After vacuum packaging, it is necessary to regularly check for air leaks. If the bag swells, it should be discarded immediately. Before cooking, the beans stored in vacuum should be checked again for any odors or discoloration.

For daily storage of fresh beans, refrigeration preservation method can also be chosen. Wrap the unwashed beans in kitchen paper and put them in a fresh-keeping bag. Refrigeration can store for 3-5 days. For long-term storage, it is recommended to blanch and pack separately for freezing. Before freezing, try to drain as much water as possible to avoid frosting. After thawing, it is recommended to thoroughly heat and consume the beans stored in vacuum, avoiding cold mixed raw food. Special populations such as those with weak digestive function should control their consumption.