ISSN : 2488-8648
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×published date:2022-Mar-24
FULL TEXT in - | page 24 - 30
Abstract
Palm oil is an edible vegetable oil derived from the fruits of the oil palm tree. Spillage of palm oil on soil is unavoidable in the oil industry. This pollution has an impact on the soil's composition. This study was therefore aimed at identifying the microorganisms associated with palm oil-polluted soil, chaff and unpolluted soil samples and studying the effect of the oil pollution on the soil microflora. Samples obtained from two different sites (Oda farm, Akure and Ori eeru, Iwo). Experiments were carried out using pour plate technique. Each sample was also screened for physicochemical tests. The pH range of the Oda farm and Ori eeru are 4.9-6.5 and 5.2-5.9 respectively. The moisture content of the Oda farm and Ori eeru samples are 33-95% and 28-39%. Bacteria isolated from the polluted soil include Bacillus sp, Staphylococcus aureus, Proteus sp, Corynebacterium sp and Micrococcus sp; while the fungi include Aspergillus flavus, Aspergillus niger, Mucor sp and Rhizopus sp. The higher bacterial and fungal counts of the polluted soil samples were 7.25 x103 and 6.05 x 103 cfu/ml respectively. The chaff had the highest fungal count of 13.0 cfu/ml of all the tested samples, while the highest bacterial population (20.7 x103) was recorded in the unpolluted soil. Most of the isolates are pathogenic species. It is essential that palm oil effluents are treated before disposal to avoid soil contamination and alteration of the soil microorganisms. Modernized methods should be employed in palm oil production to avoid spillage during processing.
Keywords: Bacteria, Chaff, Fungi, Palm oil, polluted soil
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