Several biological processes exist for simultaneous removal of nitrogen and phosphorus. These biological processes, which involve one or more anaerobic-anoxic-aerobic reactors, are widely used globally due to their economic feasibility and environmental sustainability when compared to physical treatments. However, these processes have disadvantages, including large space requirements due to the arrangement of the reactors and relatively low phosphorus removal efficiencies. In this study, a 2-stage continuous-backwash upflow sand filter system was developed for simultaneous removal of nitrogen and phosphorus from sequencing batch reactor effluent. The biological nitrification and denitrification processes occurred simultaneously with the physical adsorption of phosphorus.