During the rapid development of the food industry, modern equipment not only improves efficiency in production, but also makes breakthroughs in product taste. Refrigeration equipment is widely used in various fields such as fresh e-commerce, cross-border food trade, and aquatic processing. However, some may not know that the combination of durian with refrigeration equipment and quick freezing technology will bring a brand new food experience.

Durian is known as the king of fruits and is a tropical fruit with extremely high nutritional value. Durian is like Stinky tofu in the fruit world. Those who love it praise its fragrance, while those who dislike it cannot bear it for a moment.

In such a position, durian is often the focus of fruit public opinion: in 2015, the Thailand durian soaking potion ripening incident caused a great uproar on the internet, and soon after, Tianjin airport inspection and quarantine personnel found that imported durian pulp and mud had excessive bacteria. For a moment, durian consumers were wandering around, worried about drug treatment when buying the entire product. Buying meat puree alone also worried about bacteria exceeding the limit.

What is the so-called durian treatment?

For example, when choosing durian, if you pick one that has an open mouth and a ripe durian flavor, but when you open it and taste it, the meat is still hard. Upon closer inspection, there are still some yellow powder on the durian shell (according to Thai parlance, it is soaked in ginger soup or the like for coloring and seasoning), and there are also claims that the amount of ripening agent used is too large, causing the flesh to open its mouth before it can ripen.

Therefore, in recent years, local residents in Thailand, Malaysia, and other places have begun to use cold storage for quick freezing to preserve durian.

Quick freezing preservation has many advantages, such as ensuring that durian meat is peeled off in a naturally mature state without any additives, ensuring health and safety.

Industry insiders remind that quick freezing and preservation of durian is a very rigorous technique. After picking durian, it must be consumed within 8 hours or subjected to rapid freezing treatment, otherwise the fruit is prone to natural fermentation and produces a large amount of water before spoilage. In general, durian is stored in a low temperature cold storage at -60 ℃ for quick freezing about three hours after landing. After one hour of rapid freezing, it is stored in a cold storage at -18 ℃ to -22 ℃. In this way, the richness and sweetness of durian can be fully preserved. If the durian flesh is directly taken out for vacuum packaging and freezing, it is also a good storage method, but this technology is more complex.

Frozen durian storage also has an important advantage for food products - the durian meat taken from the freezer is slightly thawed, does not smell very strong, and tastes like ice cream. Therefore, nowadays, frozen durian is not only gradually becoming popular in the production area, but also among durian enthusiasts.

Of course, the prerequisite for delicious and healthy frozen durian is that the quick freezing and freezing process are in place. If not in place, such as if the temperature does not meet the standard, it can cause bacteria to exceed the limit. In early December 2015, Tianjin Airport inspection and quarantine personnel sampled a batch of 200 kilograms of durian pulp and found that its total bacterial count exceeded the limit by 97 times. The consumer market is constantly developing, technology is constantly breaking through, and the quality of low-temperature preservation engineering should also closely follow market demand and industry standards.

According to statistics, currently in China, most of the freezing and preservation techniques are used for fish and meat, while the preservation techniques for vegetables and fruits mainly include refrigeration, controlled atmosphere, etc. Durian, due to its inherent characteristics, is not suitable for freezing and preservation together with other fruits. Therefore, currently freezing durian is considered a pioneer in freezing fruits. In the future, whether it is marketing or cold chain transportation, it will take some time to adapt to digestion, but the popularity of frozen durian is a trend that cannot be underestimated.