Eutrophication caused by nitrogen and phosphorus in wastewater is a big problem. Scientists tested a modified Phoredox reactor to remove these nutrients efficiently. The reactor had an anaerobic section at the bottom and performed best at certain conditions. It removed 95.5% of COD and 94.9% of BOD5 at specific rates. It also removed 96.5% of TP, leaving only 0.54 mg/L, meeting environmental standards.