Freeze preservation: divide the prawns into small portions and put them into fresh-keeping bags, then put them in the refrigerator for freezing, and then take them out when they need to be eaten 1 portion for thawing.

Fresh-keeping in vivo: pour ice water on the fresh prawns, and put them in the refrigerator for freezing after they enter the dormant state.

Slightly frozen preservation: spray the prawns with cold salt water, put them in the refrigerator after the surface of the prawns is frozen, and control the temperature at-2-3℃.

Frozen storage and fresh-keeping: the prawns are quickly frozen to about -30℃, coated with ice and placed in an environment of-18℃.

First, frozen preservation

1, divide the prawns into several portions according to the consumption quantity at each time, then put them into fresh-keeping bags, and then store them in the refrigerator for freezing. Just take out 1 portion at each time.

2. This method is simple, time-saving and easy to thaw, and it will not affect the taste of other prawns.

Second, live preservation

1. Wash fresh prawns repeatedly with ice water, and put them in the refrigerator for freezing after their body temperature drops and they enter a dormant state. Or put fresh prawns in mineral water bottles, then add appropriate amount of water and put them in the refrigerator for freezing.

2. The preservation time of this method is longer, and the prawns can be preserved more completely and fresher.

Third, slightly frozen preservation

1 Spray the prawns with supercooled salt water to make the surface of the prawns quickly freeze and the inside of the prawns quickly cool down, and then store them in the refrigerator at about 2-3℃ below zero.

2. This method can obviously inhibit the action of enzymes and microorganisms, and can significantly reduce the dry consumption and reduce the juice flowing out of shrimp during thawing.

Fourth, frozen storage and preservation

1, the prawns are quickly frozen to about -30℃, and then stored in a low temperature environment of-18℃. At this temperature, the microorganisms in the prawns are inhibited, and various enzyme reactions and chemical reactions in the prawns are at a standstill, so the spoilage of the prawns can be suppressed.

2. It should be noted that the protein of shrimp meat itself may be deformed by using this method, and the moisture of shrimp meat is easy to lose during freezing, which will affect the appearance and taste after thawing.

Five, add ice to keep fresh

1, wash the prawns, and then remove a layer of ice from the plastic fish box, and then put a layer of prawns, which requires that the prawns are covered with ice and thin ice. The distribution of ice cubes should be uniform, so that prawns can be cooled quickly, evenly, fully and completely.

2. There should be a drain hole at the bottom of the fish tank so that the melted ice water can flow out. After the ice storage is completed, put the fish box into the refrigerated compartment (or insulated fish box or insulated car) in time, and then transport it out.

3. This method is suitable for newly caught prawns.