Quality Assessment and Potential Adverse Impact of Nutrients in Khartoum Refinery Effluents
This study assessed the effluent quality of Khartoum petroleum refinery in terms of nutrients (nitrogen, N and phosphorus, P) by testing the treated monitoring pond (MP) effluent on the basis of limitation guidelines, evaluated oxidation ponds (OPs) performance and investigated potential impact on the surrounding area in Khartoum North locality, Khartoum state, Sudan. Data analysis showed Tincrease, NH3– N and Ptotal quality parameters do not comply with the standard limits, whereas pH, NO3–N, NO2–N and Portho are in accordance. Average removal efficiency in oxidation ponds for Tincrease and NH3– N was 100 and 97.23 %, respectively. In contrast, pH, NO3–N, NO2–N, Portho and Ptotal, increased by 1.80, 5900, 1284.60, 893.60 and 118.90 %, respectively. This study revealed possible groundwater contamination or adverse impact on the surrounding soils and farms through leaching or rain runoff. Thus, effluent management improvement is required and closer monitoring including the fate of contaminants is recommended.
Keywords - Groundwater, Nutrients, Oxidation ponds, Petroleum refinery effluents.