alexa Crude Oil Contaminant and Bio-remediation using Brewery Mash and Earthworm (Nsukkadrilus mbae.) a Consortium to Cleaning-up and Restoring Soil Fertility Potentials
ISSN:2157-7463

Journal of Petroleum & Environmental Biotechnology
Open Access

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Research Article

Crude Oil Contaminant and Bio-remediation using Brewery Mash and Earthworm (Nsukkadrilus mbae.) a Consortium to Cleaning-up and Restoring Soil Fertility Potentials

Okpashi VE1*, Igori Wallace2 and Akpo DM3
1Department of Biochemistry, University of Nigeria, Nsukka, Nigeria
2Department of Chemistry, College of Education, Oju, Benue State, Nigeria
3Department of Environmental Education, University of Calabar, Nigeria
Corresponding Author : Okpashi VE
Department of Business and Economic Studies
University of Naples “Parthenope”, Nigeria
Tel: +234 806 360
E-mail: [email protected]
Received February 12, 2015; Accepted April 22, 2015; Published April 29, 2015
Citation: Okpashi VE, Wallace I, Akpo DM (2015) Crude Oil Contaminant and Bio-remediation using Brewery Mash and Earthworm (Nsukkadrilus mbae.) a Consortium to Cleaning-up and Restoring Soil Fertility Potentials. J Pet Environ Biotechnol 6:223. doi:10.4172/2157-7463.1000223
Copyright: © 2015 Okpashi VE, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
 

Abstract

In this research, we perceived that some approaches adopted by environmentalist and researchers to remediate crude oil contaminated soil, by using microorganisms such as Pseudomonas aeruginosa, Aspergilus nigar and Azotobacter have obvious drawback. Thus we set out to adopt synergistic application of earthworms and brewery mash as consortiums for cleaning-up crude oil contaminated soil. The result gave significant reduction of contaminants in the soil. The efficiency of this approach arose due to considerable biological influence of earthworms in the soil by burrowing, feeding on the brewery mash, promoting aeration and facilitating rapid oxidation of the contaminants. The brewery mash was introduced as nutritional additive that would supplement for the depleted nitrogen and phosphorus, to facilitate associated feeding regimes. Wherein the brewery mash serve as carbon source to the earthworms. The results suggest that the co-application of Nsukkadrilus mbae and brewery mash promoted the reduction of both recalcitrant TPH and PAHs crude oil-contaminated soil. It equally showed that by increasing the number of earthworms, will further enhanced loss of contaminants. Considering the relative availability and affordability of earthworms and brewery mash, this approach is unarguably economical. Field application of earthworms and brewery mash for bioremediation would require careful consideration in matching earthworm treatment approach with appropriate earthworm species. Thus, earthworms enhance oil degradation via oxidation processes due to the aeration resulting from burrowing activities, increased microbial availability of hydrocarbons due to bioturbation and facilitate microbial activities. The observed increase in respiration rate by microorganisms indicates that earthworms and brewery mash have positive influence on microbial activities. In general, if given longer time, the synergistic application/activities of earthworm and brewery mash contaminants clean-up would be absolute, beneficial and economic approach to bio-remediate dissolvable and recalcitrant contaminated hydrocarbons in polluted soil.

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