Evaluation of Wastewater from a Refinery Treatment Plant for Agricultural Use

Abstract

Wastewater use for agriculture is on the increase due to the growing world population and the increasing scarcity of good quality water resources. The performance of wastewater from a refinery treatment plant regarding its use for agricultural purpose was evaluated. Samples of the wastewater were collected at points A, B, C and D at specified distances of 10 meters apart. Samples were analyzed for both physical and chemical parameters. The pH value of the results of samples at points A, B, C and D were 7.90, 10.38, 10.27 and 9.92 respectively which are outside the standard range with higher alkalinity. The dissolved oxygen ranges between 7.06 and 13.41 mg/L while the Chloride values ranged between 31.99 and 58.48 mg/L and that of Sodium ranges between 6.50 and 130 mg/L. Ammonia and Nitrate were observed to have a high conductivity in sample at point B. Thus the harmful effect on the environment could be corrected if the wastewater Plant operations supervision is intensified; capable hands (experts) are used coupled with periodic training of personnel.