NOVELTY - Solid waste is treated by feeding fluid fraction containing active bacteria into solids digestion vessel, draining liquid, de-watering treated solid waste, transferring further liquid removed from the treated solid waste to a liquid digester tank containing a source of organic material undergoing anaerobic bacterial digestion, and drawing second fluid fraction for use as a fertilizer.    USE - For treating solid waste from livestock for producing a liquid product for use as a fertilizer and a solid product used as a fuel or as a soil treatment.    ADVANTAGE - The pre-treatment of the solid waste material reduces the required retention in the solids digester before the solids waste has been sufficiently treated to become environmentally acceptable for discharge.    DETAILED DESCRIPTION - Treatment of solid waste comprises transferring the solid waste to solids digestion vessel (100); providing a series of liquid digester tanks (10) including a first liquid digester tank (12) and one of liquid digester tanks (14) containing a source of organic material undergoing anaerobic bacterial digestion in a fluid phase digestion stage to produce a first fluid fraction containing active bacteria in subsequent liquid digester tank; feeding a portion of the fluid fraction containing active bacteria into the solids digestion vessel to begin a solids digestion phase to create treated solid waste; draining the liquid from the solids digestion vessel to end the solids digestion phase; transferring the treated solid waste from the solids digestion vessel to a de-watering unit in which further liquid is removed from the treated solid waste to create de-watered treated solid waste; transferring the further liquid removed from the treated solid waste in the de-watering unit to a liquid digester tank containing a source of organic material undergoing anaerobic bacterial digestion; and drawing from a lower portion of the subsequent liquid digestion tank a second fluid fraction for use as a fertilizer.    An INDEPENDENT CLAIM is also included for a solids digestion vessel for use in the inventive process.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic plan view of a plant for carrying out a process.    Chopper pump (6)    Liquid digester tanks (10)    First liquid digester tank (12)    Last liquid digester tanks (14)    Solids digestion vessel (100)