NOVELTY - The apparatus comprises an inner container, an outer container, and a lid for enabling to open and close and having a space. The lid is provided with the inner and outer containers. An opening and closing unit has a stack or an opening and closing part for cutting off a space of the outer container in open and close operation. An upper edge of the inner container is arranged between the outer container and a support stand. The support stand supports the inner container. First and second separate networks separate sewage from food waste while putting the food waste inside the inner container.    USE - The apparatus is useful for treating a food wastage (claimed).    ADVANTAGE - The apparatus treats the food waste with less electric power consumption and without generating bad odor.    DETAILED DESCRIPTION - The apparatus comprises an inner container, an outer container, and a lid for enabling to open and close and having a space. The lid is provided with the inner and outer containers. An opening and closing unit has a stack or an opening and closing part for cutting off a space of the outer container in open and close operation. An upper edge of the inner container is arranged between the outer container and a support stand. The support stand supports the inner container. First and second separate networks separate sewage from a food waste while putting the food waste inside the inner container. An exhaust unit discharges the gas generated in the food waste. The apparatus further comprises an opening/closing plate in which the opening/closing unit is rotatably arranged in a hinge shaft, and an opening and closing button. A lower end portion of the opening and closing button is arranged in an upper side of an opening and closing member. The opening and closing member is moved downward in the pressing operation. A returning spring is rolled for enabling to revert the opening and closing button. A rotating bar is adapted to rotate the opening and closing button, and is contacted with an engagement member. An one end of the rotating bar is connected to a spring member. An other end of the rotating bar is connected to a lower part of an opening/closing plate. The spring member is connected to a lower part of the opening/closing plate. A transmission network has mesh shape, and is provided with a bottom surface of the separate networks. A foul water display unit indicates the amount of foul water present in the food waste, is provided with a bottom surface of the inner container, and includes a display cap protruded to an upper side of a drifting buoy member. An indication bar is arranged in a lower end portion of the drifting buoy member. The opening and closing part has a switching unit and an extension part.