Occurrence and diversity of microorganisms isolated from selected solid waste dumpsites in parts of Ondo State, Nigeria
Paper Details
Occurrence and diversity of microorganisms isolated from selected solid waste dumpsites in parts of Ondo State, Nigeria
Abstract
This study was designed to assess the microbiological and physicochemical properties of soil samples from selected waste dumpsites in parts of Ondo State, Nigeria. The findings of the microbiological analysis carried out showed the mean values of the total heterotrophic bacterial counts ranged from 1.17 × 106 ± 0.08 cfu/g – 7.67 × 106 ± 0.01 cfu/gwhile the total fungal counts recorded ranged from 1.00 × 104 ± 0.02 sfu/g to 6.33 × 104 ± 0.11 sfu/g. The recorded physicochemical properties of the soil samples ranged from 5.4 to 7.9, 4.95 to 45.36%, 0.86 to 2.50% and 2.38 to 11.35% for pH, organic matter, organic nitrogen and organic carbon respectively. The soil particles of the selected dumpsites recorded a range of sand between 55 – 80%, silt 7 – 31% and clay 4 – 29%. The microbial isolates characterized and identified include Bacillus, Alcaligenes, Staphylococcus, Proteus, Micrococcus, Pseudomonas, Serratia, Ochrobacterium, Escherichia and Aspergillus, Penicillium, Mucor, Rhizopus, Cladiosporiumand Trichodermarespectively. Bacillus and Aspergillus species were the most prevalent microorganisms isolated from the selected dumpsites and studies have revealed these organisms to be pathogenic in nature, which could pose serious health risk to residents in and around the dumpsites.
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