PHOSPHORUS REMOVAL AS Ca-P PRECIPITATE FROM SWINE WASTEWATER AND EQUILIBRIUM CALCULATION

Abstract

 Wastewater from livestock facilities shows higher concentration in organics and nutrients than domestic wastewater. In a treatment process of swime farmer in which biological treatment process is installed, effluent contained 17 mgP/L of phosphorus even though 96% of phosphorus was removed in the process. This paper deals with the further removal of phosphorus as calcium phosphate precipitation to show up to 67% of phosphorus was removed by raising pH. In addition, the issues on using softwares for chemical equilibrium reactions is discussed.