In order to meet the treatment requirements of rural domestic sewage,a biological rotating cage treatment process was constructed based on the principle of biofilm method.The effects of rotating speed,infiltration rate and inflow flow on the treatment effect were studied through a pilot test(1.5 t/d treatment)system,and the process conditions were optimized on thisbasis.The results show that when the rotating speed is 4 r/min,the removal rate of COD and NH3-N in the treatment system reaches the highest,respectively 90%and 80.02%,and the removal rate of TP reaches 69.41%;When the infiltration r...