NOVELTY - A multilevel circulation membrane bioreactor device comprises cylindrical shell (8) with sealed upper and lower ends in which upper part of shell contains water inlet, water inlet is connected by water inlet pipeline set with water inlet flowmeter (4), water inlet pump (3), and solenoid valve (2) to raw water tank (1), top plate of shell contains through-holes connected by valve-containing medicine-adding tube to medicine tank (23), bottom of shell contains aeration head, and aeration head is connected by pipeline with solenoid valve to air pump (14).    USE - A multilevel circulation membrane bioreactor device for enrichment culturing of broad-spectrum beta -lactamase-producing bacteria (claimed) and treatment of antibiotic-containing pharmaceutical wastewater and hospital medical waste.    ADVANTAGE - Multilevel circulation membrane bioreactor device is fully automated, saves energy, and has no pollution, simple structure, and good mass transfer performance.    DETAILED DESCRIPTION - A multilevel circulation membrane bioreactor device comprises cylindrical shell (8) with sealed upper and lower ends in which upper part of shell contains water inlet, water inlet is connected by water inlet pipeline set with water inlet flowmeter (4), water inlet pump (3), and solenoid valve (2) to raw water tank (1), top plate of shell contains through-holes connected by valve-containing medicine-adding tube to medicine tank (23), bottom of shell contains aeration head, aeration head is connected by pipeline with solenoid valve to air pump (14), bottom plate of shell contains sludge discharge pipeline (11) and vent pipeline (12), bottom of shell is set with bracket (19) set with guide cylinder (9), gap is set between tube walls of guide cylinder and shell, guide cylinder contains through hole and membrane module (7), membrane module is hollow fiber tube with sheet-shaped structure, both ends of hollow fiber tube are connected to 2 vertical water pipes, upper ends of 2 vertical water pipes are connected to both ends of horizontal water collecting pipe, water collecting pipe is connected by water outlet pipe set with water outlet flowmeter (17), water outlet pump (15), vacuum table, and solenoid valve to clean water storage tank (16), clean water storage tank contains water outlet, water outlet is connected to tube with solenoid valve to inlet of backwash pump (22), outlet of backwash pump is connected to membrane module water outlet pipeline, temperature control equipment (20) and online monitoring equipment are set between shell and guide cylinder, and water pumps, air pumps, temperature control equipment, online monitoring equipment, medicine tank, and solenoids are connected by control line to central control system of programmable logic controller (PLC).    DESCRIPTION OF DRAWING(S) - The drawing shows a 3-dimensional schematic diagram of multilevel circulation membrane bioreactor device. (Drawing includes non-English language text).    Raw water tank (1)    Solenoid valve (2)    Water inlet pump (3)    Water inlet flowmeter (4)    Membrane module (7)    Cylindrical shell (8)    Guide cylinder (9)    Sludge discharge pipeline (11)    Vent pipeline (12)    Air pump (14)    Water outlet pump (15)    Clean water storage tank (16)    Water outlet flowmeter (17)    Bracket (19)    Temperature control equipment (20)    Backwash pump (22)    Medicine tank (23)