Ojonoma Loretta Okwute | University of Abuja (original) (raw)

Ojonoma Loretta Okwute

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Papers by Ojonoma Loretta Okwute

Academic Journals, Dec 31, 2007

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Various concentrations (1, 5 and 10 %) of milled oven-dried ginger and fresh ginger were incorpor... more Various concentrations (1, 5 and 10 %) of milled oven-dried ginger and fresh ginger were incorporated into ogi at the beginning of fermentation. Physicochemical and microbiological changes were noted during fermentation. The Minimum Inhibitory Concentration (MIC) and the Minimum Bactericidal Concentration (MBC) of ethanolic ginger extract on selected bacterial isolates were also investigated. Physicochemical parameters such as pH and Titratable acid were analysed while microbiological changes were observed by inoculation of the various concentrations on Nutrient Agar, Salmonella-Shigella agar using the spread plate method. The pH of ogi samples decreased steadily and ranged between 4.11 at the beginning of fermentation and 5.74 at the end of fermentation and Titratable acidity (TA) ranged between 0.22 at the beginning of fermentation (0 hr) and 0.75 % at the end of fermentation (72 hrs). The total viable and coliform counts ranged between 2.8 and 7.3 (x10 5 cfu/ml) and 2.8 and 5.9 (...

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The effects of palm oil mill effluent (POME) on the total aerobic bacterial populations and ammon... more The effects of palm oil mill effluent (POME) on the total aerobic bacterial populations and ammonium oxidizers in the soil were assessed. This was done by culturing soil samples from an effluent dumpsite for the total aerobic bacterial counts and ammonium oxidizers. Results showed that the total aerobic bacterial populations in the POME soil samples (9.6 x 108 ± 0.3 at 20oC, 1.64 x 109 ± 0.2 at 30oC and 1.07 x 109 ± 0.4 at 40oC) were significantly higher (P 0.05) than the counts for the non-POME soil samples (4.5 x 108 ± 0.3 at 20oC, 7.6 x 108 ± 0.3 at 30oC and 5.9 x 108 ± 0.3 at 40oC). In addition, ammonium oxidizers were isolated from the non-POME soil samples but not from the POME soil samples.

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The aim of this study was to demonstrate the use of chicken droppings and cow dung in the amendme... more The aim of this study was to demonstrate the use of chicken droppings and cow dung in the amendment of soil polluted with palm oil mill effluent (POME) in bioremediation. Soil polluted with 20 % raw (POME) in the laboratory was amended with different concentrations of chicken droppings, cow dung and a combination of the wastes (10 %, 20 % and 30 %). Isolation, characterization and identification of microorganisms were carried out and compared over time with respect to the different concentrations. Gas chromatography mass spectroscopy (GCMS) analysis of extracts of POME polluted and amended soil indicated a reduction in the number of long chain hydrocarbons (C13-C44) in POME polluted soil to C8-C21 in amended soil. This was attributed to the presence of microorganisms of the genera Pseudomonas, Bacillus, Proteus, Micrococcus, Aspergillus, Penicillium, Paecilomyces and Candida in significant numbers throughout the period of analysis. However, a combination of the two organic wastes at...

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