Awotoye, O.O., Institute of Ecology and Environmental Studies, Obafemi Awolowo University Ile-Ife, Nigeria; Dada, A.C., Institute of Ecology and Environmental Studies, Obafemi Awolowo University Ile-Ife, Nigeria; Arawomo, G.A.O., Institute of Ecology and Environmental Studies, Obafemi Awolowo University Ile-Ife, Nigeria
The study was carried out to investigate the contribution of effluent from a palm oil processing unit on the receiving section of Oluwa River in Ondo State, Nigeria. Temperature, pH, COD, BOD5, major metals (NO3-, PO4-, K+, Na+, Mg2+) and heavy metals (Zn2+, Mn2) as well as TS and TDS were determined in about 45 water samples obtained from various upstream and downstream locations away from the effluent discharge. Data obtained were subjected to statistical analyses of variance (ANOVA). Significant variations exist in most of the chemical variables among the sampled sections. Comparison of the investigated parameters at the various sections of the river with the standard limit of effluent guideline showed that the downstream water is polluted, especially in NO3, Zn2+, BOD5 and COD. The need for a drastic move towards quality and environmental conservation through sustainable development and cleaner technology approach within manufacturing industries in Nigeria is highlighted.
