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Otokunefor, T.V. and Obiukwu, C, “Impact of refinery effluent on the physicochemical properties of a water body in the Niger delta,” Applied Ecology and Environmental Research 3, 61-72. 2005.

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Article

Potential Application of Urea and NPK 15:15:15 Fertilizers as Biostimulants in the Bioremediation of Domestic Wastewater

1Department of Chemical Engineering, University of Benin, Benin City, Nigeria


American Journal of Environmental Protection. 2013, Vol. 1 No. 4, 91-95
DOI: 10.12691/env-1-4-3
Copyright © 2013 Science and Education Publishing

Cite this paper:
Andrew N. Amenaghawon, Peter A. Asegame, Kessington O. Obahiagbon. Potential Application of Urea and NPK 15:15:15 Fertilizers as Biostimulants in the Bioremediation of Domestic Wastewater. American Journal of Environmental Protection. 2013; 1(4):91-95. doi: 10.12691/env-1-4-3.

Correspondence to: Andrew N. Amenaghawon, Department of Chemical Engineering, University of Benin, Benin City, Nigeria. Email: andrew.amenaghawon@uniben.edu

Abstract

The role of urea and NPK 15:15:15 fertilisers as biostimulants of microbes in the bioremediation of domestic wastewater was investigated in this study. 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 bioremediation. The indicating parameters such as pH, Biochemical Oxygen Demand (BOD), and Dissolved Oxygen (DO) over a period of 5 weeks were used. The results obtained showed that there was a BOD reduction of 86.62, 85.24 and 86.85% for wastewater treated with urea, NPK and a combination of both respectively. Stimulation by the fertilisers improved the DO level by 76, 75 and 77.8% respectively for wastewater treated with urea, NPK and a combination of both respectively. Generally, the best results were obtained when both fertilisers were used together. The final values of pH, BOD and DO fell within the values of 6-9, 30 mg/L and 2 mg/L set by the Federal Environmental Protection Agency (FEPA). The results obtained indicate the effective use of urea and NPK fertilisers in stimulating the activity of microbes for bioremediation in wastewater.

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