With inverted A2/O process,We tried to remove the nitrogen from the actual fecal sewage and ur-ban sewage simultaneously.Under optimal experimental conditions,nitrogen load for simultaneous removal of the critical mixture from the sewage sludge is 0.019 8 kg.kg-1.d-1.Hydraulic retention time is the controlling fac-tor for mixed sewage removal.Sludge recycle ratio affects the nitrification and denitrification is weakest.In the water temperature of 28-35℃,the best condition for synchronized denitrification fr...