Technology for recycling beer from beer waste yeast paste

The invention discloses a technology for recycling beer from beer waste yeast paste, which comprises the steps that the beer waste yeast paste is injected into a circulation tank, and filtered and separated by a metal membrane or a ceramic membrane through a feeding pump, a condenser and a circulation pump; the separated beer penetrating fluid is added to a semi-finished product processing system; a part of waste yeast paste mother liquor returns to the circulation tank, and the other part is filtered by the metal membrane or the ceramic membrane through the circulation pump; and the waste yeast paste is exhausted to enter a deep processing system when the seepage of filter membrane beer is less than 20L/m h. The technology has the advantages of effective separation and clarification of the beer waste yeast paste, high separation speed, high precision, direct elimination of yeast and bacteria, and sterilization technology ignorance, and the separated beer can directly enter a draught beer processing system. After the beer yeast paste is separated by the membranes, the beer is recycled, no waste is exhausted, the yield and the quality of the beer are enhanced, 100 to 150 thousand tons of the beer can be recycled every year equivalent to about RMB 200 million, the BOD (Biochemical Oxygen Demand) value can be reduced by about 50%, and the environment protection load can be greatly reduced.