Effect of aeration rate on domestic wastewater treatment using an intermittently aerated sequencing batch reactor (iasbr) technology
1 Civil Engineering, National University of Ireland, Galway, Ireland
2 Department of Civil, Structural and Environmental Engineering, Trinity College Dublin, Dublin 2, Ireland
2 Department of Civil, Structural and Environmental Engineering, Trinity College Dublin, Dublin 2, Ireland
Abstract
Effects of the aeration rate on nutrient removal from synthetic domestic wastewater using an intermittently aerated sequencing batch reactor (IASBR) were studied at ambient temperature. Two aeration rates, 0.8 and 1 L air/min, were studied. At the aeration rate of 0.8 L air/min, removals of COD, NH4+-N, total nitrogen (TN) and PO43--P were 84%, 96%, 75% and 99%, respectively. At the aeration rate of 1 L air/min, removals of COD, NH4+-N, TN and PO43--P were 90%, 99%, 70% and 66%, respectively. The increased DO concentrations resulted in improved nitrification, but interfered with denitrification and enhanced biological phosphorus removal (EBPR).
Keywords
aeration; denitrification; EBPR; IASBR; nitrification