NOVELTY - A wastewater treatment system comprises an anaerobic bioreactor to remove organic pollutants in wastewater through anaerobic treatment, an aerobic bioreactor placed rearwardly of the anaerobic bioreactor to remove residual organic pollutants in effluent of anaerobic bioreactor through aerobic treatment, and a membrane separation reactor placed rearwardly of the aerobic bioreactor to separate solids from liquids in effluent of aerobic bioreactor.    USE - The system is used for treating wastewater containing organic compounds. It is useful in the disposal of municipal or industrial wastewater.    ADVANTAGE - By employing the inventive system in the treatment of wastewater containing organic pollutants, organic pollutants are effectively eliminated and the problems of scaling and fouling on the surface of the membrane are prevented, lowering costs and improving efficiency.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for treatment of wastewater containing organic compounds, by feeding wastewater containing organic pollutants into an anaerobic bioreactor, where the anaerobes decompose the organic pollutants in the wastewater; feeding effluent of anaerobic bioreactor into an aerobic bioreactor where the aerobes decompose the residual organic in wastewater and carbon dioxide dissolved in water is stripped through air stripping so that the pH value of water is increased, and the crystals of metal carbonate, struvite and inorganic solids are produced and inserted in the floc matrix of aerobes through bioflocculation; and feeding effluent of aerobic bioreactor into a membrane separation reaction, where solids in the water are separated to obtain effluents free of organic pollutants.    DESCRIPTION OF DRAWING(S) - The figure is a schematic diagram of the inventive wastewater treatment system.    Anaerobic bioreactor (1)    Aerobic bioreactor (2)    Membrane separation reactor (3)    Pretreatment device (4)    Alkaline sludge hydrolysis apparatus (5)