A comprehensive study on nutrient removal from domestic wastewater by integrated anoxic and fixed-bed membrane bioreactors

A comprehensive study was developed to investigate the roles of combined anoxic and fixed bed MBR (FBMBR) in nutrient removal from the municipal wastewater. The performance of anoxic + FBMBR in different organic loading rate (OLR) (0.58, 2.15 and 2.45 kg COD/m ³ .day) in terms of COD, BOD, total nitrogen (TN) and total phosphorus (TP) with study period of 180 days. The results indicated that the highest removal efficiency for COD (93.92%) was obtained in ORL equal to 2.15 kgCOD/m ³ d (93.92%). However, the COD removal efficiency for OLR equal to 2.45 kgCOD/m ³ d was promising (90.94%). In case of nutrients, the highest removal efficiency for TN and TP within the study period were 94.98% and 57%, respectively and meet the standards for discharge to the environment. Therefore, the combined anoxic and FBMBR is a promising technology for efficient removal of nutrients from the municipal wastewater with high concentration levels of nutrients.