COMPARATIVE EVALUATION OF THE PHYSICOCHEMICAL PROPERTIES OF DIFFERENT AGRICULTURAL WASTEWATERS IN EDO STATE, NIGERIA.
AbstractFor effective, sustainable and reliable wastewater treatment procedures, adequate information of the pollution levels of the wastewater is necessary. Thus, a comparative evaluation of the pollution levels of different agricultural wastewaters was investigated in this study by analysing their physicochemical properties using standard procedures. For the purpose of this study, Palm Oil Mill Effluents (POMEs) were collected from three different locations namely; Nigeria Institute for Oil Palm Research (NIFOR), Okomu Oil Mill farms and Presco Oil Palm Plc., while Rubber Processing Effluents (RPEs) were obtained from Iyayi Rubber Processing Farms, Okomu Oil Mill farms and Sapele Integrated Industries Limited (SIIL). The result obtained for the POMEs reveals properties, not within the regulatory standard for effluent discharge, temperatures were very high ranging between 70 ± 0.20 – 95 ± 0.20 0C and pH values were in the acidic region (4.4 ± 0.10 – 4.5 ± 0.10). Also, NIFOR and Presco POMEs had comparable properties, which were quite higher than that of Okomu POME. Slightly acidic pH values, ranging from 6.60 ± 0.10 - 6.84 ± 0.20 which were, within the regulatory standard for effluent discharge, were recorded for RPEs. The Total Solids (TS), Suspended Solids (SS) and COD for RPEs were lower than those of POMEs. NIFOR POME recorded the highest COD (59,814.81 ± 10.00 mg/l), TS (48,000.00 ± 10.00 mg/l), SS (18,178.00 ± 2.00 mg/l) and oil/grease (4200.00 ± 0.13 mg/l), while these values were lowest for Iyayi RPE; COD (929.48 ± 0.10 mg/l), TS (765.00 ± 4.16 mg/l), SS (400.00 ± 1.00 mg/l) and oil/grease (0.00 ± 0.00 mg/l). The data obtained could provide indications for suitable treatment options for the wastewaters. Keywords: Wastewaters, physicochemical properties, effluent, POME, RPE