NOVELTY - A membrane reactor for immobilized microorganism comprises membrane tank (1), membrane component (2), immobilized microorganism carrier (3), control valve (4), water pump (5), flow meter (6), regulating valve (7), vacuum meter (8), fan (9), aeration adjusting valve (10), gas flow meter (11), liquid level controller (12), exhaust valve (13), water inlet pump (18), and cleaning system. The membrane component comprises component (2A), aeration pipe (2B), and collecting pipe (2C). The cleaning system comprises a cleaning control valve (14), dosing funnel (15), pump (16) and liquid tank (17).    USE - Membrane reactor for immobilized microorganism.    ADVANTAGE - The reactor is convenient to control and has simple structure.    DETAILED DESCRIPTION - A membrane reactor for immobilized microorganism comprises membrane tank (1), membrane component (2), immobilized microorganism carrier (3), control valve (4), water pump (5), flow meter (6), regulating valve (7), vacuum meter (8), fan (9), aeration adjusting valve (10), gas flow meter (11), liquid level controller (12), exhaust valve (13), water inlet pump (18), and cleaning system. The microbial immobilization carrier is set in membrane tank. The membrane component comprises component (2A), aeration pipe (2B), and collecting pipe (2C). The membrane components are separated from each other. The aeration pipe is located on the lower part of the membrane component. The cleaning system comprises a cleaning control valve (14), dosing funnel (15), pump (16) and liquid tank (17). An INDEPENDENT CLAIM is included for processing waste water by feeding waste water into membrane tank through water pump, feeding active sludge into membrane tank, entering immobilized microorganism carrier, and controlling water level; uniformly distributing sludge mixed liquid and microbial immobilization carrier to membrane component through aeration pipe; vacuum pumping water at 100 kPa; and closing vacuum pump when water flux is reduced to 80%, opening pump, soaking for 4-6 hours, cleaning film component, and starting vacuum pump to pump fluid discharger. The water flux is 1-100 L/m2.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic diagram of membrane reactor.    Tank (1)    Membrane component (2)    Component (2A)    Aeration pipe (2B)    Collecting pipe (2C)    Immobilized microorganism carrier (3)    Control valve (4)    Water pump (5)    Flow meter (6)    Regulating valve (7)    Vacuum meter (8)    Fan (9)    Aeration adjusting valve (10)    Gas flow meter (11)    Liquid level controller (12)    Exhaust valve (13)    Cleaning control valve (14)    Dosing funnel (15)    Pump (16)    Liquid tank (17)    Water inlet pump (18)