Microbiology

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Final Year Project in Microbiology

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    ASSESSMENT OF THE INTRINSIC BIOREMEDIATION POTENTIAL OF SURFACE WATER OF AFELELE RIVER, OFFA, KWARA STATE
    (2021) ABDULRAHEEM, Khairat Abiola
    Study of the intrinsic bioremediation potential of Afelele River, Offa, Kwara state. The Objectives of this study is to determine the physicochemical properties, heavy metal content and also to isolate and characterize bacteria from Afelele surface water. Physicochemical properties were determined according to APHA standard method for the examination of water and waste water and Heavy metals contents of surface water were determined using Atomic Absorption Spectrophotometer (Bulk scientific VGP 210 model). Bacteriological analysis and biochemical characterization was carried out according to Bergey’s manual of determinative bacteriology. In view off the various anthropological activities around the study area such as dumping of refuse and washing, which has resulted in heavy pollution of the water. Hence, the potential of the river to bioremediate itself naturally (self-purification) is jeopardized. Microbes are very helpful to remediate the contaminated environment. The Physicochemical analysis of the river water indicates alkaline pH of surface water 8.81 ± 0.05. Other physicochemical properties indicate significant variations in the values obtained for the surface water. The alkalinity of the right wing RW1 is 65.30, while the Left wing LW1 is 66.80 and the outflow OF1 is 66.85. The acidity of IF2 is relatively low at 12.52±0.10. The Total dissolved solid (TDS) of OF1 at 250.55±2.51 is low compared to 299.50 ± 2.90 mg/l found in LW1, while IF-2 has the highest amount of the Total Suspended Solids (TSS) with 1196.85±4.51 compared to 1115.50±4.10 found in RW1. The value of the BOD is high in RW-2 at 3.80±0.02 and it is lower in the IF2 at 3.50±0.05.COD values are also high in the surface water. The COD of RW-2 is 4.07±0.09 which is the lowest among the regions of the river. The pH of the surface water is 8.81 ± 0.05 at the outflow OF1. Heavy metals content analysis showed high concentrations in the river water. Isolates obtained from the river water were identified as Pseudomonas aeruginosa, Yersinia pestris, Micrococcus spp., Klebsiella pneumoniae, and Edwardsiella tarda. This study has shown that Afelele river is a polluted system that requires remediation and that neither the water nor the fishes in the water is safe for human consumption. It also revealed the diverse culturable members of the surface water are well-adapted to various pollutants in the water and might play important role in the intrinsic bioremediation of the polluted ecosystem.