MEMBRANE BIOREACTOR (MBR) IS A ADVANCED TECHNOLOGY DEVELOPED SINCE THE END OF 20TH CENTURY WHICH REALIZED THE EFFICIENT COMBINATION OF MEMBRANE SEPARATION TECHNOLOGY WITH BIOLOGICAL TECHNOLOGY. THE MEMBRANE SEPARATION TECHNOLOGY REPLACES THE TRADITIONAL ACTIVE SLUDGE METHOD AND THE NORMAL FILTER UNIT, ITS STRONG SEPARATION ABILITY CAN MAKE THE SS TURBIDITY NEAR TO BE ZERO, THEREFORE GREATLY EXPANDS THE SCOPE OF APPLICATION OF WASTEWATER RECYCLING