NOVELTY - The organic wastewater processing apparatus has an oil-component separation unit which separates oil component during wastewater flow, biological treatment tank (2) which carries out biological treatment of supernatant liquid ejected from the separation unit, and control portion which controls the oil-component discrete amount by the oil-component separation unit, based on specific data.    USE - For processing of organic wastewater such as wastewater containing animal and vegetable oil and straight mineral oil.    ADVANTAGE - The apparatus enables efficient processing of organic wastewater with suppressed usage amount of chemical agent and electric power, and suppresses discarding amount of oil component. Labor burden for adjustment of wastewater treatment equipment is suppressed.    DETAILED DESCRIPTION - The organic wastewater processing apparatus has an oil-component separation unit which separates oil component during wastewater flow, biological treatment tank which carries out biological treatment of supernatant liquid ejected from the oil-component separation unit, and control portion which controls the oil-component discrete amount by the oil-component separation unit. The control unit controls the amount based on one or more of data (A) chosen from data group which shows water amount and water quality state of the supernatant liquid ejected from the oil-component separation unit and data group which shows the water amount and water quality state of waste water which flows into the oil-component separation unit, and one or more of data (B) chosen from data group which shows the water quality state of the biological treatment tank.    An INDEPENDENT CLAIM is included for processing of organic wastewater.    DESCRIPTION OF DRAWING(S) - The figure shows the schematic drawing of the organic wastewater processing apparatus. (Drawing includes non-English language text)    Floatation unit (1)    Biological treatment tank (2)    Solid-liquid separation unit (3)    Return-sludge flow path (4)    Sludge storage tank (6)