The present invention relates to a resource recovery system for organic waste water and, more specifically, to a resource recovery system for organic waste water comprising: a solid-liquid separator for separating the organic waste water into liquid waste water and solid sludge; an anaerobic digestion tank for anaerobically digesting the liquid waste water separated by the solid-liquid separator; an aerobic oxidation tank for oxidizing biochemical oxygen demands (BOD) and T-N substances remaining in the anaerobically digested waste water discharged from the anaerobic digestion tank; a membrane separating device for separating the aerobically oxidized waste water into concentrate containing the T-N substances and floating matters and clean water; and a clean water storing tank and a concentrate storing tank for storing the clean water and the concentrate respectively. The resource recovery system for the organic waste water reuses the clean water stored in the clean water storing tank as cleaning water for a pen or discharges the clean water, and selectively manufactures and utilizes an ammonia-based liquefied nitrogen fertilizer or a nitrate-based liquefied nitrogen fertilizer as a liquefied fertilizer by adjusting the supply amount of air by the aerobic oxidation tank.
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