NOVELTY - The membrane separation activated sludge process equipment has an aerator (4), membrane filtration units (5), filtration membrane sheet, hollow fiber membranes, hollow fiber membrane module (9) and a diffuser. The activated sludge process equipment processes wastewater biologically and carries out membrane separation of the activated sludge. The aerator consists of membrane filtration unit(s) immersed into the activated sludge. The hollow fiber membrane module consists of hollow fiber membranes arranged parallel in downward direction.    USE - For biological processing of wastewater containing organic matter.    ADVANTAGE - The membrane separation activated sludge process equipment efficiently and reliably removes sludge disposal. The membrane filtration unit does not disturb the flow of gas-liquid mixing rotational flow and therefore increases the amount of dissolved oxygen in the sludge.    DETAILED DESCRIPTION - A membrane separation activated sludge process equipment has an aerator, membrane filtration units, filtration membrane sheet, hollow fiber membranes, hollow fiber membrane module and a diffuser. The activated sludge process equipment processes wastewater biologically and carries out membrane separation of the activated sludge. The aerator consists of membrane filtration unit(s) immersed into the activated sludge, and has highly efficient oxygen desolving-machine structure having efficiency greater than oxygen dissolution efficiency. The hollow fiber membrane module consists of hollow fiber membranes arranged parallel in downward direction. The membrane filtration unit discharged gas bubble and is raised to the gap of hollow fiber membrane. The diffuser generates gas-liquid mixing rotational flow which falls at the outer side of the membrane filtration unit.    DESCRIPTION OF DRAWING(S) - The figure shows the schematic block diagram of separation membrane activated sludge process equipment. (Drawing includes non-English language text)    Fine eye screen (1)    Natural-water adjustment tank (2)    Anaerobic tank (3)    Aerator (4)    Membrane-filtration unit (5)    Hollow fiber membrane module (9)    Sheet-like membrane element (10)