This study examined the possibility of combined with MAP crystallization treatment using a reactor with compact settling zone combined with hydrocyclone treatment to achieve a high rate of treatment. e MAP reactors with a compact sedimentation basin or a baffled plate separator at top of reactor were discussed, hydro-retention time were 4.6 min and 1.6 min for the separator zone, respectively. The mean removal rate of total phosphorous T-P by MAP crystallization was 86.7% and 55.3%, respectively. The fine MAP particle in effluent from MAP reactor was separated by hydrocyclone. Overall T-P removal rate are reached 89.5% and 77.6%, respectively.