NOVELTY - A vegetable biomass is continuously separated into fluid phase and solid containing phase by mixing moist vegetable biomass and recycled aqueous juice, and allowing denser material to sink. The mixture is comminuted to produce a slurry separated into aqueous juice and mush. The aqueous juice is divided into major and minor portions. The major portion is recycled and the minor portion is removed.    USE - The method is used for continuous separation of vegetable biomass into fluid phase and solid containing phase of pulpy consistency. The solid containing phase or mush is utilized for the production of fiber products and optionally for the extraction of other organic products. It can also be used for producing small biocompatible pellets, e.g. fodder pellets; and larger biocompatible products of higher strength, e.g. mats, boards and molded pots.    ADVANTAGE - The method does not produce waste product, since aqueous juice and mush are all utilized.    DETAILED DESCRIPTION - Continuous separation of vegetable biomass into fluid phase and solid containing phase of pulpy consistency, involves feeding moist vegetable biomass to a mixing zone equipped with stirrer of a conditioning vessel. A recycled aqueous juice is also fed to the mixing zone. The mixture is stirred while any denser material is allowed to sink to a settling zone located below the mixing zone. It is fed to a rotary comminutor to produce a slurry, and the slurry is then fed to a separator for partitioning into aqueous juice and mush. The mush is removed, and the aqueous juice is divided into major and minor portions. The weight ratio of the major and minor portions provides for balance between water entering and leaving the process. The major portion of aqueous juice is recycled and the minor portion is removed. The rotary comminutor has comminuting stage(s) comprising stator and rotor. Each of the stator and rotor has operative surfaces spaced from each other by a gap. The surfaces are equipped with cutting elements that are directed into the gap and terminated by cutting edges.