Features A. removal of pollutants is high, anti-sludge strong expansion capability, stable and reliable water quality, the water is no suspended solids; B. membrane bioreactor to achieve a reactor STR and SRT and HRT of control, respectively, thus greatly simplifying its design and operation; C. mechanical interception film to avoid the loss of microorganisms, can maintain a high sludge concentration within the bioreactor, thereby improving the volume load, reducing sludge load, is extremely impact resistance; D. Because SRT long bioreactor also played the role of "sludge nitrification pool" to significantly reduce sludge production, low sludge production, low sludge disposal costs; E. Due Closure SRT to extend the role of the film so that is conducive to slow the proliferation of microorganisms. F. MBR activated sludge aeration tank with water does not drain, during operation, the activated sludge due to changes in concentration of organic matter into the change, and achieve a dynamic equilibrium, which makes the system stable and have high impact water load characteristics; G. larger hydraulic cycle resulted uniformly mixed sewage, thus making activated sludge has good dispersibility, greatly improve the specific surface area of ??activated sludge. MBR system is highly fragmented in the activated sludge treatment effect is to increase another reason. This is a common biochemical treatment technology to form larger zoogloea difficult to match; H. membrane bioreactor is easy integration, easy to implement automatic control, easy operation and management; I. MBR process omits the secondary settling tank, reduce the area.