Stimulated Biodegradation of Spent Lubricating Motor Oil in Soil Amended with Animal Droppings

Abstract

The potentials of organic wastes from animal droppings as bioremediation alternative for soils spiked with waste-lubricating motor oil (spent oil) was evaluated. The rate of biodegradation of the spent oil was studied for a period of 6 months under laboratory condition.

Shift in microbial group during remediation by enhanced natural attenuation (RENA) of a crude oil-impacted soil: a case study of Ikarama Community, Bayelsa, Nigeria

“…On the other hand, the low concentration of pollutant did not favor the growth of culturable hydrocarbon utilizing bacteria (CHUB) as a result, the control sample recorded the lowest CHUB count. The highest CHUB recorded for sample collected during the remediation was attributed to biostimulation of the polluted site with nutrients and other treatments, which favored, and stimulated the activities of hydrocarbonoclastic bacteria resulting in rapid pollutant degradation; similar observation has been reported (Onuoha 2013). The reduced CHUB count obtained after the remediation was ascribed to reduction in pollutant concentration and nutrient depletion (Adebusoye et al 2007;Shabir et al 2008;Nwogu et al 2015).…”

Microbial Remediation of Used Engine Oil from Contaminated Soil around Automobile Workshop in Calabar Metropolis, Cross River State, Nigeria

“…was the most abundant bacteria species (highest growth rate), denoting an effective utilization of hydrocarbon, thereby multiplying rapidly and degrading hydrocarbons more effectively in the process and as such said to be best biodegradation bacteria. The bacteria isolates obtained in this study belong to both the gram positive and gram negative groups, although the gram negative bacteria dominated the gram positive samples and similar results were obtained by [19,21] who also reported both gram positive and gram negative bacteria. Also, the dominance of gram negative bacteria agrees with the findings of [22] who reported that gram positive bacteria if detected in bioremediation are never diverse and dominant.…”

“…The progressive rapid increase (growth) in the number of the identified indigenous bacteria in the contaminated sites in this study is an indication of the fact that the contaminated sites supported the growth of such bacteria, although with the help of the nutrient and Mac-Conkey agar, which was eventually very slow in the uncontaminated site (control site). The bacteria counts for both the nutrient and Mac-Conkey agar was similar to that reported by [23,19,24] but lower than that reported by [25]. This variation could be due to the differences in microbial ecology of the soil or characteristics of the experimental soil.…”

“…which is similar to the findings of [17] who also reported Staphylococcus spp., Pseudomonas aeruginosa, Bacillus spp., and Acinobacter spp. amongst their bacteria degrading checklist; as well as [19,20] who also reported Pseudomonas aeruginosa and Bacillus spp.…”

Effects of organic amendment on some soil physicochemical characteristics and vegetative properties of Zea mays in wetland soils of the Niger Delta impacted with crude oil

“…The pH of the three organic wastes was in the alkaline range except for the palm oil waste (POW) ( Table 1). Although the pH values of the organic amendment materials used in this study were higher than the reported values for goat droppings and poultry waste (Onuoha et al 2014) the pH of the wastes used can promote the growth of bacteria, which thrive in near-neutral to alkaline soil (Onuoha et al 2014). The total nitrogen content of the organic wastes used for the organic amendment ranged from 1.40 to 2.24% ( Table 1).…”