NOVELTY - A biological nutrient removal process, comprising subjecting an aqueous organic waste to an aerobic biological treatment in the presence of a biosludge, discharging separated liquid fraction as treated water, and recycling a portion of decomposed sludge fraction, that results in the release of supplementary of biological and chemical oxygen demands, to the aerobic biological treatment, is new.    USE - For removing biological nutrients from an aqueous organic waste in the presence of a biosludge.    ADVANTAGE - The invention produces no biological excess sludge, and provides high nutrient removal efficiency. It uses the released rapidly assimilizable COD coming from the oxidation reactor for advancement of N and P removal in the biological process, thus omitting the need for the addition of any external carbon source. It controls the amount of sludge to be oxidized as a function of the amount of supplementary BOD required for nutrient removal, or as a function of the BOD/N and BOD/P ratios of the influent. It limits operation cost compared to other combinations of biological treatment and oxidation processes due to the limited need for sludge oxidation/disintegration.    DETAILED DESCRIPTION - A biological nutrient removal process of an aqueous organic waste, comprising:    (a) subjecting the aqueous organic waste to an aerobic biological treatment in the presence of a biosludge;    (b) separating the aerated aqueous suspension into a liquid fraction and a sludge fraction through solid/liquid separation;    (c) discharging the separated liquid fraction as treated water;    (d) mechanically or chemically decomposing a portion of the separated sludge fraction resulting in the release of supplementary of biological oxygen demand (BOD) and chemical oxygen demand (COD); and    (e) recycling a portion of the decomposed sludge to the first step of aerobic biological treatment.    The amount of BOD and COD generated is dependent upon the amount of nutrient to be removed in the separated liquid fraction.    An INDEPENDENT CLAIM is also included for an apparatus for the biological nutrient removal process, comprising:    (a) an aerobic biological treatment unit for subjecting the aqueous organic waste supplied to an aeration tank to an aerobic biological treatment in the presence of the biosludge containing aerobic microorganisms;    (b) a solid/liquid separation unit for subjecting the aerated aqueous suspension in the aeration tank to solid/liquid separation;    (c) an exhausting mechanism for the liquid fraction as the treated water and a recycling mechanism for a portion of the separated sludge portion;    (d) a decomposition container for decomposing the sludge fraction; and    (e) a control for controlling the amount of nitrogen (N) and phosphorus (P) in the final effluent.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic flow diagram of a treatment apparatus.    Anaerobic basin (3a)