Browsing by Author "Mokuolu, O.A"
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Item Assessment of Quality Status of Soils Around Dumpsites in Ilorin Metropolis, Nigeria(Nigerian Research Journal of Engineering and Environmental Sciences, 2020) Iji, J.O; Mokuolu, O.A; Abdulkadir, T.S; Oluwaseun, O.VPathogenic microorganisms in solid waste can be introduced into the environment when improperly managed. This study evaluates the microbiological and physicochemical properties of topsoil samples obtained from three municipal waste dumpsites and a dumpsite free area (control sample) all located in Ilorin, Kwara State, Nigeria. Soil samples were collected on a spot at depth range of 15-30 cm for laboratory analyses which included measurements of temperature, pH, moisture content and microbiological population. The pH values of the samples ranged from 6.7 to 7.9. The temperature ranged from 26 oC to 28 oC which falls within the mesophilic range. The total aerobic heterotrophic bacteria population ranged from 1.8×105 cfu/ml to 5.8 × 105 cfu/ml for all the three dumpsites and 1.0×105 cfu/ml for the control. The specie of bacteria isolated from the soil samples from the dumpsites included Staphylococcus auerus, Streptococcus faecalis, Klebsiella aerogenes, Bacillus subtilis, Proteus vulgars and Micrococcus cuteus. Only Bacillus subtilis and Micrococcus cuteus were dominant in the control. The total viable fungal population ranged from 1.0 × 104 cfu/ml to 2.6 × 104 cfu/ml for all the soil samples from the dumpsites and 1.1 × 104 cfu/ml from the control. The fungi isolated from the soil samples included Aspergillus flavus, Rhizopus stolarifer, Aspergillus niger, Penicillium chrysogenium and Alteruaria tenuis. Only chrypsogspuss and Alteruaria tenuis were identified in the control. Presence of microorganisms in dumpsites around Ilorin metropolis suggests that environmental quality has been significantly affected as the soil sample showed high population of pathogenic microorganisms. Hence, remediation is suggestedItem FISH POND WASTEWATER HYDROPONIC TREATMENT POTENTIAL OF CITRULLUS COLOCYNTHIS(Journal of Research in Forestry, Wildlife and Environment, 2019-03) Mokuolu, O.A; Olokoba, S.O; Aremu, S.A; Olanlokun, O.KC.colocyn this’ plant hydroponic treatment of fish pond’s wastewater (FPWW) was evaluated. The FPWW was collected from the University of Ilorin aquaculture and tested for the dissolved oxygen (DO), biochemical oxygen demand (BOD), chemical oxygen demand (COD), electrical conductivity (EC), total dissolved solid (TDS), temperature, pH and bacteriological content. The wastewater under treatment was tested for all the physicochemical parameters on weekly interval for the experimental period, while the bacteriological analysis was done before and after the treatment. The values obtained for the physicochemical parameters were statistically analyzed at p<0.05. The physicochemical results observed before application of C.colocynthis treatment technique were 25°C, 540µS/cm, 7.5, 270mg/l, 8.62mg/l, 22.65mg/l and 4.2mg/l for temperature, electrical conductivity, potential hydrogenation, total dissolved solid, 5-day BOD, COD, and the DO respectively. After the fifth week, the analysis of variance of the sample’s results showed that the electrical conductivity, total dissolved solid, 5-day BOD and the COD were insignificantly reduced from 539 to 209µS/cm, from 270 to 102mg/l, 8.62 to 4.8mg/l and from 22.65 to 12.01mg/l respectively at P>0.05. The treatment efficiencies were observed to be 61.29%, 62.22%, 44.31% and 46.97% respectively. Also, the DO increased from 4.2 to 8.12 having percent increment of 93.33%, while the bacteriological analysis showed that FPWW has 215±35 colonies and 2.15±0.35×107 Cfu/ml before the application of C.colocynthis hydroponic treatment and 83±18 colonies and 8.3±0.18× 106 Cfu/ml after hydroponic treatment. The statistical results were insignificant but were within the limits of comparative standards.