NOVELTY - Sealing circulatory system solid liquid separation system of liquor lees, comprises diluting cultured photosynthetic bacteria (106-1013/ ml) with water, mixing liquor lees (75 vol%) photosynthetic bacteria treated water (104-1012 cells/ml), performing continuous solid-liquid separation using continuous centrifugal separator, and separating the aggregation supernatant liquid into solid and liquid to a solid substance and a clarification supernatant liquid, irradiating photosynthetic bacteria and culturing the disinfected clarification supernatant liquid.    USE - The sealing circulatory system solid liquid separation system is useful for separating solid and liquid components of liquor less (claimed).    ADVANTAGE - The solid and liquid components of liquor less can be separated within short time.    DETAILED DESCRIPTION - Sealing circulatory system solid liquid separation system of liquor lees, comprises solid liquid separation method of the liquor lees which separates a liquor lees into solid and liquid as solid substance and supernatant liquid containing 104-1013 cells/ml photosynthetic bacteria, diluting cultured photosynthetic bacteria (106-1013/ml) with water, performing a simultaneous mixing process which produces aggregation separation within 5 minutes while mixing the liquor lees (75 vol% or less not less than 10 vol.%) with photosynthetic bacteria treated water that is subjected to crude picking filter (104-1012 cells/ml), where the photosynthetic bacteria treated water is obtained by diluting using closed simultaneous mixer, performing continuous solid-liquid separation of the obtained aggregation supernatant liquid that is delivered directly to a continuous centrifugal separator, and separating the aggregation supernatant liquid into solid and liquid to a solid substance and a clarification supernatant liquid, disinfecting microorganisms other than photosynthetic bacteria in the obtained clarification supernatant liquid, irradiating photosynthetic bacteria and culturing the disinfected clarification supernatant liquid.