| 摘要 |
PURPOSE:To provide a process for separating an oil component from food residue and for obtaining low-oil-content feed by adding water or hot water to food residue and washing it at high temperatures. CONSTITUTION:The process comprises placing residue of animal or vegetable food in a processing kettle 1, adding water or hot water to the kettle 1, oil- washing the residue at a high temperature of steam or an open flame in the kettle to separate the oil component from the residue, withdrawing the separated liquid containing the oil component by means of a screw press or a filter, and sending the withdrawn liquid to a decanter 3, where it is separated into a light liquid containing the oil component, a heavy liquid and a solid. This process further includes cooking the solid separated from the screw press 2 in a high- pressure kettle and separating an oil component from the cooked solid by means of a filter. Alternatively, this process may be one wherein the addition of water or hot water to the residue is replaced by washing with water or hot water. The solid separated from the screw press 2 or the filter is dried to obtain low- oil-content feed. |
