Author/Authors :
Amenaghawon، N.A نويسنده Department of Chemical Engineering, Faculty of Engineering, University of Benin, PMB 1154, Benin City , , Asegame، A.P نويسنده Department of Chemical Engineering, Faculty of Engineering, University of Benin, PMB 1154, Benin City , , Obahiagbon، K.O نويسنده Department of Chemical Engineering, Faculty of Engineering, University of Benin, PMB 1154, Benin City ,
Abstract :
ABSTRACT: The use of urea and NPK 15:15:15 fertilisers as nutrient sources for microbes in the bioremediation of domestic wastewater was studied in a batch system. Five samples of domestic wastewater supplemented with 10, 20, 40, 60 and 80 g/L of urea, NPK as well as a combination of both fertilisers and the control were monitored for a period of 5 weeks. Physicochemical properties such as, Biochemical Oxygen Demand (BOD), Dissolved Oxygen (DO) and pH were measured. The results obtained showed that there was a reduction in BOD from 120.34 to 16.10 mg/L, 120.34 17.76 mg/L and 120.34 to 15.83 mg/L for wastewater treated with urea, NPK and a combination of both respectively. There was an improvement in the DO level from an initial value of 0.8 mg/L to 3.4, 3.2 and 3.6 mg/L respectively for wastewater treated with urea, NPK and a combination of both respectively. Generally, the best performance resulted when both fertilisers were used together. The values obtained were all within the acceptable limits set by the Federal Environmental Protection Agency (FEPA).
