Traditional drainage system is the pipe-end treatment mode, in which water and substance flow linearly, resource recovery of waste hard to realize, does not accord with requirements of sustainable development and circular economy. New concept of Semi-centralized Treatment System, which can realize water, nutrition and energy circle through separate water supply and separate discharge system was presented in this paper. In the research Integrated Moving Bed Biofilm Reactor (IMBBR) was designed as the greywat...