NOVELTY - A liquid waste material is dried in drying under reduced pressure apparatus (12). The vapor from the drying process is deodorized and purified to process the material. The apparatus (12) has horizontal cylinder (14), stirring medium (16) and horizontal rotation stirrer equipped with stirring blades (22) and rotation axis (20). The periphery of cylinder and/or inner portion of axis is equipped with heater.    USE - For processing liquid containing waste material or organic refuse such as droppings of cow, pig and bird. The processed material is used as raw material in the manufacture of food, pharmaceutical and fragrance, soil conditioner, fodder and fertilizer.    ADVANTAGE - The water vapor and odor generated from processed material by heating is sucked with a circulation pump and jet pump, and purified effectively. Large amount of industrial waste is effectively processed using a compact and simple apparatus with low running cost. The waste material is dried efficiently under reduced pressure and the volume of the material is reduced effectively.    DETAILED DESCRIPTION - A liquid containing waste material is dried under reduced pressure by carrying out vacuum suction and composted by fermentation, in drying under reduced pressure apparatus. The vapor from the drying process is deodorized and purified,and the waste material is processed. The apparatus (12) has horizontal cylinder, cylindrical or aggregated form stirring medium (16) which performs transfer, and horizontal rotation stirrer. The stirrer is equipped with stirring blades (22) having preset pitches and made to transverse in the surroundings of rotation axis (20). The periphery of horizontal cylinder and/or inner portion of rotation axis is equipped with heater.    An INDEPENDENT CLAIM is included for drying under reduced pressure apparatus.    DESCRIPTION OF DRAWING(S) - The figure shows the systematic diagram explaining the processing of liquid containing waste material. (Drawing includes non-English language text).    drying under reduced pressure apparatus (12)    horizontal cylinder (14)    stirring medium (16)    rotation axis (20)    stirring blade (22)    jet pump (70)