NOVELTY - An organic-waste processing apparatus (1) has classifiers (I,II) (3,4), a stirrer (32) for stirring water, a dehydrator (7), and a storage tank. Water containing the organic waste is passed through classifier (I), and lightweight foreign material is classified to center portion and heavy foreign material is classified to the periphery, by specific-gravity difference.    USE - The apparatus is useful for processing organic waste.    ADVANTAGE - The organic-waste processing apparatus has excellent efficiency. Foreign materials, such as stone, glass and plastic, are removed by classification. Dehydration is carried out without using heaters. The obtained solid substance is utilized as compost raw material, and the obtained liquid is utilized as biomass raw material.    DETAILED DESCRIPTION - An organic-waste processing apparatus (1) has classifiers (I,II) (3,4), a stirrer (32) for stirring water with the organic waste (2), a dehydrator (7), and a storage tank. Classifier (I) has a screen (33), which classifies foreign material from the organic waste stirred with water. Water containing the organic-waste is passed through classifier (I), and lightweight foreign material is classified to center portion and heavy foreign material is classified to the periphery, by specific-gravity difference. Classifier (II) has an outlet between the center portion and the periphery. The dehydrator dehydrates water from the organic waste guided from the outlet of classifier (II), and the storage tank stores the dehydrated water.    An INDEPENDENT CLAIM is included for processing method of organic waste, which involves adding water and stirring with organic waste, classifying the organic waste into lightweight and heavy foreign materials via a screen, dehydrating the non-classified organic waste, and utilizing produced liquid as liquid-biomass raw-material and dehydrated solid substance as a compost raw material.    DESCRIPTION OF DRAWING(S) - The figure shows the explanatory drawing of the organic-waste processing apparatus.    Organic-waste processing apparatus (1)    Organic waste (2)    Classifiers (3,4)    Dehydrator (7)    Storage tank (10)    Stirrer (32)    Screen (33)