Liquid fermentation of 50 kilograms of corn uses a fermentation barrel with a capacity of 130 kilograms. The ratio of grain to water is 100 to 100, then the grain is 50 kilograms, the water is 50 kilograms, and the total amount added together is 100 kilograms. When choosing a tank, you must choose a tank with a capacity of at least 130 kilograms. The extra 30 kilograms of space is for Breathing space for grain fermentation to survive. Liquid fermentation is a biological reaction process in which materials are first prepared into a liquid state and then microorganisms are introduced into the liquid.