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Aim: This research aims to carry out a comparative assessment on the use of pig manure and poultry manure as a carbon substrate for the degradation of diesel.
Study Design: Fifteen experimental pots were used in this analysis and this was carried out for a duration of 44 days. This experiment was done in stages and each stage was for 2 weeks. Experimental pots were labelled appropriately with the right concentrations of soil, diesel oil and manure to avoid cross-contamination. This experiment involved one pollution level of 0.275% of the weight of soil. Two (2) treatment concentrations of 20% and 40% of the weight of soil for pig manure and poultry manure respectively, three temperature levels of 25ºC, 30ºC, 37ºC.
Place and Duration of Study: Microbiological laboratory and Environmental Science laboratory of Coventry University/two months.
Methodology: Bioremediation of the diesel contaminated soil involved two concentration levels of 40 g and 80 g. These concentrations (40 g and 80 g) were used for both pig manure and poultry manure. These manures were measured in the fume cupboard using an electronic balance to avoid pollution to air. The right manure concentrations of 40 g and 80 g were transferred into the appropriately labelled pots containing 200 g of soil each. The mixture (soil+ diesel+ pig/poultry manure) was properly homogenised and allowed for biodegradation.
Results: Results of TPH analysis showed high percent removal of 84.71%, 90%, 82.35%, 85.29% for soil treated with pig manure at 40 g and 80 g, and soil treated with 40 g, 80 g of poultry manure at 37ºC. This study showed that the microbial consortium, nutrient concentration and temperatures played great roles in enhancing bioremediation process.
Conclusion: Nutrient addition enhanced the degradation of diesel contaminated soil. It is evident from the results that at 37ºC diesel degradation occurred more in all soil samples than at 30oC and 25ºC. Therefore, it can be concluded that 37ºC is most suitable for diesel degradation with the highest efficiency in soil treated with 80 g of pig manure. However, at 25oC, high percent degradation also occurred in all treated samples with spi-40 g having the highest percent degradation.
Ibekwe VI, Ubochi K, Ezechi EU. Effect of organic nutrient on microbial utilization of hydrocarbons on crude oil contaminated soil. African Journal of Biotechnology. 2006;5(10):983–986.
Leahy JG, Colwell RR. Microbial degradation of hydrocarbons in the environment. Microbial Rev. 1990;54(1): 305.
Meenu T, Manuela M, da Fonseca R, Carla CC, de Carvalho R. Bioaugmentation and biostimulation strategies to improve the effectiveness of bioremediation processes; 2010.
Mei-ying F, Rui-jie X. Gang bioremediation of petroleum-contaminated soil by a combined system of Biostimulation-Bioaugmentation with Yeast. Journal of Environmental Technology. 2014;35(4):1–25.
Okop IJ, Ekpo SC. Determination of total hydrocarbon content in soil after Petroleum spillage. In Proceedings of World Congress on Engineering WCE; 2012.
Pelletier E, Delille D, Delille B. Crude oil bioremediation in Sub Antarctic Intertidal Sediment; Chemistry and Toxicity of Oiled Residues. Mar. Environ. Res. 2004;57: 311–327.
Wan N, Eui-Young H, Joon-Seok P, Jung-Young C. Bioremediation of Diesel Contaminated Soil with Composting. Journal of Environmental Pollution. 2002; 119(1).
Yakubu MB. Biodegradation of Lagoma crude oil using pig dung. African Journal Biotechnology. 2007;6(24):2821–2825.
Daniel EK, Carl J, Rose AL, John AL. Potassium Crop Production.
Ekperusi OA, Aigbodion FI. Bioremediation of petroleum hydrocarbons from crude oil contaminated soil eith earthworm: Hyperiodrilus africanus. Biotechnology. 2015;5(6):957–965.
Wang Y, Feng J, Lin Q, Lyu X, Wang X, Wang G. Effect of crude oil contamination on soil physical and chemical properties in Momoge Wetland of China. Chinese Geographical Science. 2013;23(6):708–715.
Agarry SE, Owabor C, Yusuf RO. Bioremediation of soil artificially contaminated with petroleum hydrocarbon Oil mixtures: Evaluation of the use of animal manure and chemical fertilizer. Bioremediation Journal. 2010;14(4):189–195.
Nwogu TP, Azubuike CC, Ogugbue CJ. Enhanced bioremediation of soil artificially contaminated with petroleum hydrocarbons after amendment with Capra aegagrus hircus (Goat) manure. Biotechnology Research International. 2015;1–7.