The present invention relates to a method for reducing the salt content of food waste according to the amount of water. Salinity reduction is essential in order to use food waste as a quality compost production material, and as a result of finding a way to effectively reduce salinity for this purpose, it was confirmed that the salt content of food wastes tends to decrease depending on the water amount In addition, an equation that can effectively estimate the salt content was derived by controlling the amount of water in food waste. Through this, there is an effect of easily measuring the salt content and calculating the amount of water, so it can be usefully used in related industries.
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