{"id":3024,"date":"2026-09-09T17:50:19","date_gmt":"2026-09-09T17:50:19","guid":{"rendered":"https:\/\/coldchange.com\/?p=3024"},"modified":"2026-09-09T18:05:36","modified_gmt":"2026-09-09T18:05:36","slug":"vacuum-cooling-mushrooms-what-actually-happens","status":"publish","type":"post","link":"https:\/\/coldchange.com\/fr\/vacuum-cooling-mushrooms-what-actually-happens\/","title":{"rendered":"Vacuum Cooling Process for Mushrooms – What actually happens?"},"content":{"rendered":"
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\"Cold<\/h1>\n

What Actually Happens When Mushrooms Are Vacuum Cooled?<\/h1>\n

For mushroom growers, removing heat from freshly harvested mushrooms as quickly as possible is one of the most important stages of post-harvest handling. The biggest and best growers use the vacuum cooling process for mushrooms.<\/p>\n

But what actually happens to a mushroom inside a vacuum cooler?<\/p>\n

The answer involves much more than simply lowering its temperature.<\/p>\n

Why mushrooms respond so well to vacuum cooling\"Vacuum<\/a><\/h2>\n

Fresh mushrooms have a very high moisture content and porous structure. These characteristics make Agaricus bisporus<\/em>particularly suitable for evaporative vacuum cooling<\/strong>.<\/p>\n

After harvest, mushrooms remain biologically active. Post-harvest development continues, while inadequate temperature control can accelerate changes in firmness, colour, stipe elongation and veil opening.<\/p>\n

This makes rapid mushroom vacuum cooling<\/a> an important first stage in establishing an effective cold chain.<\/p>\n

Vacuum Cooling Process for Mushrooms -What happens when chamber pressure falls?<\/h2>\n

Inside a vacuum cooler<\/a>, air is removed from the sealed chamber and the absolute pressure progressively decreases.<\/p>\n

As pressure falls, so does the boiling point of water.<\/p>\n

At sufficiently low pressure, a small proportion of moisture within and around the mushroom begins to evaporate at low temperature.<\/p>\n

This phase change from liquid water to water vapour requires latent heat<\/strong>. That energy is taken from the mushroom itself, causing its temperature to fall rapidly.<\/p>\n

Unlike conventional air cooling, where heat must transfer from the product into surrounding cold air, vacuum cooling uses controlled evaporation to remove heat from the product.<\/p>\n

\"Mushroom<\/h2>\n

What happens to the mushroom itself?<\/h2>\n

A 2023 study published in Microchemical Journal<\/em> investigated Agaricus bisporus<\/em> during vacuum cooling.<\/p>\n

Researchers monitored moisture content, lightness (L*), yellowness (b*), hardness and chewiness<\/strong> as cooling progressed. The study demonstrated moisture migration and evaporation from both the surface and internal regions of the mushroom during the vacuum cooling process for mushrooms.<\/p>\n

Read the scientific study on mushroom vacuum cooling \u2013 ScienceDirect<\/a><\/p>\n

Some moisture loss is therefore inherent in vacuum cooling because evaporation is the mechanism producing the cooling effect.<\/p>\n

The objective of a correctly configured system is to achieve the required core temperature rapidly while controlling evaporative weight loss<\/strong>.<\/p>\n

Why does rapid pre-cooling matter?<\/h2>\n

Temperature has a major influence on post-harvest mushroom quality.<\/p>\n

Research into button mushroom cooling has shown that cooling conditions can influence subsequent water loss, firmness, colour and browning<\/strong> during refrigerated storage.<\/p>\n

Read the research on cooling rate and mushroom quality \u2013 ScienceDirect<\/a><\/p>\n

For growers, rapid pre-cooling can therefore help slow processes associated with:<\/p>\n