Role of organic matter, nitrogen and phosphorous on granulation and settling velocity in wastewater treatment

In this study, the ability of aerobic biogranulation process to remove organic matter, total nitrogen, and phosphorous from wastewater was investigated. The effect matter load on quality produced biogranules settling velocity generated biomass also Four different scenarios were studied in sequential batch bioreactors (SBR) identify best operating conditions. experimental setup consisted four containing 300 mL samples (100 sludge 200 sweet whey at concentrations) under constant stirring (150 rpm), room temperature, controlled pH (e.g., 7.98 ± 0.25). loads calculated as chemical oxygen demand (COD) concentration 1157 (A), 719 (B), 357 (C), 202 mg/L (D), respectively. cycles initial feast followed by 72 h famine. During experiments, COD, nitrogen (TN), phosphorus (TP) measured beginning (t0) end process. results confirmed that conditions found bioreactor with highest COD (1157 mg/L), which achieved 98.7 % reduction 45.6 TP, 99.4 TN after 9 days final average 0.7 m/h. improved clarification supernatant, showing increased all bioreactors. Microscopic observation uniform morphology spherical or cylindrical) biggest being observed A B. Organic play a significant role formation achievement removal, volume reduction, water clarification. overall trend C > B D A, them faster than untreated sample. study confirm high potential for treatment content.