The lees has a large acidity and a moisture content of more than 65%. It is highly biochemical, easily corrupted, and inconvenient to store. If not handled in time, it will easily cause great pollution to the environment. On the other hand, lees, as a by-product of the production of liquor, is rich in nutrients such as crude protein, crude fat, crude starch, crude fiber and nitrogen-free leachate, and is also rich in inorganic elements such as phosphorus and potassium as well as pentose and total sugar. Ingredients are an excellent source of organic fertilizer manufacturing process. The use of rich lees raw materials to make organic fertilizers can not only solve environmental problems, turn waste into treasure, but also provide an organic environment for green agricultural production. It has high economic, environmental and social benefits.
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