What is the time and working principle of different fermentation methods?

Why the fermenting tank produces the edible fungus liquid fungus for 3 days can complete the work, and the blow oxygen method takes 7-8 days, is whether the fermenter has 0.2-0.4 tank pressure edible fungus liquid fungus fermentation for at least five days or more, too fast is possible to be the mold. Unless mushrooms grow like mushrooms, they grow faster than molds. Fungal fermentation is commonly used in airlift fermentor, oxygen blowing method and you say is a truth. The growth speed of mycelia is related to the efficiency of gas exchange through liquid and liquid, and the efficiency of carbon dioxide.