1, air-dried preservation: chestnuts are soaked in cold water barrels, and water overflows chestnuts. After soaking for 7~ 10, take it out, put it in a bamboo basket, hang it in a ventilated place and dry it naturally. In this case, if chestnut is allowed to air dry, the shelf life of chestnut can be greatly improved. Soaking chestnuts in water for three to seven days can effectively kill bacteria and eggs in them, and then take them out and drain them, so they will not go bad easily after storage. If a small amount of bleaching agent is added (the concentration of five ten thousandths is enough), the effect will be better.

2. ventilation and preservation: put fresh chestnuts in a cool and ventilated place, spread them out and don't pile them up. Chestnuts can be kept for a month or two as long as they are ventilated.

3. Bag air drying: spread the fresh chestnuts in a container, air dry them in a cool and ventilated place for 2-3 days, and then put them into a bag. Cloth bags are breathable. Never use plastic bags. Hanging in a cool and ventilated place, shaking 1 ~ 2 times a day. This method can generally preserve chestnuts for 4 months.

4. Refrigeration: Expose fresh chestnuts in the sun for a day or so, then peel off the shell and put it into a fresh-keeping bag, tie the mouth tightly and put it in the refrigerator for refrigeration, which can also improve the storage time, but it should be noted that chestnuts must be shelled and preserved.

You can also use another method: add 1 tsp salt to cold boiled water and soak chestnut for 3-5 minutes for simple sterilization. Rinse with cold boiled water after soaking and dry for 1-2 days. When it shakes, chestnuts make a sound, so they can be packed in plastic bags, tied tightly and stored in the freezer. This method can preserve chestnuts for more than one month, and the treated chestnuts are sweet and crisp.

5. Mixed storage of sawdust: mix fresh chestnut with sawdust, remember to cover some sawdust on the upper layer and store it in a cool and ventilated place, so that it can be stored for a period of time.

6, sand preservation: a large number of chestnuts can be buried in sand. Put the sand in a container with a layer of sand on the bottom and chestnuts on the sand. Cover with a layer of sand, cover with sand, put a layer of chestnuts, and so on. After the chestnuts are put away, add a layer of sand at last. Spray water occasionally to keep the sand moist. The amount of water sprayed should be moderate. In order to preserve the moisture of chestnut, this is why the chestnut is separated with sand, but the moisture can not be too much, which will lead to chestnut rot.