Crude Oil Degradation by Microorganisms in Soil Composts

Omotayo, Ayodele E.; Ojo, OA; Amund, Olukayode O.

doi:10.3923/jm.2012.209.218

Cited by 23 publications

(27 citation statements)

References 7 publications

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“…The extracted aliquot was evaporated to dryness in the water bath at 69 o C and residue oil was dissolved in 10 ml of n-hexane and the concentration was measured according to Omatayo et al, (2012) using visible spectrophotometer at 400 nm. Concentration of oil in the sample was obtained using the pre-prepared standard curve and the dilution factor was considerate to calculate the actual concentration (Latha and Kalaivani, 2012).…”

Section: Estimation Of Crude Oil Concentrationmentioning

confidence: 99%

“…Thus, inorganic nutrients are limiting factors for the natural biodegradation process (Trindade et al, 2002;Efsun et al, 2013). The majority of microorganisms thrive best in the pH range of 6 to 8 (Omatayo et al, 2012) and adjustment of pH range from 4.5 to 7.4 was resulted in a near doubling of biodegradation rates of hydrocarbon (Leahy and Colwell, 1990). Thus, the manipulation and optimisation of these factors are needed to enhance the remediation process of pollutants in the environment (Dragun, 1998;Boopathy, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Optimisation of Environmental Factors on Oil Degrading Bacteria Isolated from Coastal Water and Sediments in Sri Lanka

Liyanage

Manage²

2015

JTFE

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Better understanding of the mechanisms of hydrocarbon degrading microorganisms and effect of some environmental factors is critical for the optimisation of the bioremediation processes. Temperature, pH, nitrate and phosphate are the major factors that influence there mediation process of bacterium. In the present study, optimisations some selected physico-chemical parameters (temperature, pH, nitrate and phosphate) were carried out on Bacillus cereus, Enterobacter sp. and Enterobacter ludwigii which were previously isolated as potential oil degraders. The bacteria showed maximum degradation of crude oil at 33 o C where the desirable pH was 8.6 for all the isolates except E. ludwigii (pH 5.4). A significant degradation (p < 0.05) of oil was detected by B. cereus (80% to 98%), Enterobacter sp. (73% to 90%) and E. ludwigii (70% to 83%) respectively with increasing of nitrate concentration from 0.1 to 2.5 ppm. Significant degradation of oil was not detected in the control and when bacteria were enriched with phosphate. Results of this study revealed that the bacterial remediation of oil is governed by nutritional status with special emphasis of nitrate enrichment in the environment. Thus, the results revealed that bacteria could be a useful tool to remove oil from the contaminated environment as eco-friendly, low cost application.

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Section: Estimation Of Crude Oil Concentrationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimisation of Environmental Factors on Oil Degrading Bacteria Isolated from Coastal Water and Sediments in Sri Lanka

Liyanage

Manage²

2015

JTFE

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“…The biological treatments are more efficient and cheaper than chemical or physical ones (Stroud et al, 2007). In relation to biological treatments, the bioremediation technology is being employed for the degradation of crude oil in soil matrix through microorganisms able to transform petroleum hydrocarbons into less toxic compounds (Omotayo et al, 2012). However, the low solubility and adsorption are two major properties of high molecular weight hydrocarbons that limit their availability to microorganisms (Kastner et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

“…According to Ralph and Ji-Dong (2010), the success of oil spill bioremediation depends on one's ability to establish and maintain conditions that favor enhanced oil biodegradation rates in contaminated environment. Numerous scientific researchers have reported various factors that influence the rate of oil biodegradation (Barathi and Vasudevan, 2001;Obayori et al, 2008;Haritash and Kaushik, 2009;Ibrahim et al, 2009;Omotayo et al, 2012). One important requirement is the presence of microorganisms with the appropriate metabolic capabilities (Kastner et al, 1995;Omotayo et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Numerous scientific researchers have reported various factors that influence the rate of oil biodegradation (Barathi and Vasudevan, 2001;Obayori et al, 2008;Haritash and Kaushik, 2009;Ibrahim et al, 2009;Omotayo et al, 2012). One important requirement is the presence of microorganisms with the appropriate metabolic capabilities (Kastner et al, 1995;Omotayo et al, 2012). If these microorganisms are present, then optimal rates of growth can be sustained by ensuring that adequate concentration of nutrients and oxygen are present and that the pH is between 6 and 9 (Rousk et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Crude oil degradation by <i>Bacillus</i> and <i>Micrococcus</i> species isolated from soil compost in Kano, Nigeria

Kawo¹,

Bacha²

2016

Bayero J. Pure App. Sci.

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Microorganisms capable of degrading crude oil were isolated from soil compost in Kano, northwestern Nigeria. The work was carried out with the aim of determining crude-oil biodegradation potentials of Bacillus and Micrococcus species isolated from the soil compost as well as the assessment of the applicability of compost in bioremediation of hydrocarbon-polluted soils. The physico-chemical and microbiological parameters of the uncontaminated soil compost samples were determined using standard procedures. Similarly, the microbiological properties of the crude oil-contaminated soil compost samples were determined using liquid Mineral Salt medium. The microorganisms isolated from the contaminated soil samples showed an appreciable degree of degradation of the crude oil used, among which the crude oil-utilizing potentials of Micrococcus species and Bacillus species isolated from the soil composts were further analyzed using biodegradation experiment. Here, utilization of the crude oil as a growth substrate by the two bacterial isolates resulted in increased population densities with simultaneous increase in emulsification index (EI 24 ) value and decrease in residual crude oil concentration. The Fourier Transform Infrared Spectrometry (FTIR) analyses of the residual hydrocarbons in the liquid minimal salt (MS) medium at the end of 15 days incubation showed that Micrococcus species had the highest degradation rate of 93.7% while Bacillus species had biodegradation rate of 87.5%. Thus, the two bacterial species isolated in this study showed appreciable degrees of degradation of the crude oil used. It could therefore be concluded that bioremediation of crude oil-polluted fields could be achieved using indigenous hydrocarbon utilizers of the soil compost and the process could be enhanced by supplementing the polluted environment with compost.

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Higher yield of cherry tomato grown in culture medium with microbially inoculated feather compost without fertilizer application

Zeng

Kuo

Chen

2018

J. Plant Nutr. Soil Sci.

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Arthrobacter ureafaciens K10, with multiple functions, such as feather degradation, phosphate solubilization, and IAA formation, and Streptomyces sp. CP3, with pitaya cladode-degrading ability, were co-inoculated in compost composed of pitaya-pruning waste (PPW), spent mushroom waste (SMW), and duck feathers (DF) in order to produce a compost called Sapf-M. Another compost, called Sapf, was manufactured via the same composting procedure but without inoculation. The two compost products were slightly acidic and had a bulk density less than 0.25 g cm -3 , a water-holding capacity (WHC) greater than 85%, a C : N ratio of nearly 10, and a germination index higher than 85%. Higher IAA concentration, EC, phosphate-solubilizing bacterial numbers, actinobacterial numbers, and water-soluble nutrients, such as ammonium, magnesium, copper, manganese, and iron, were found in Sapf-M compared to Sapf. Five different culture media were prepared: peat mixed with Sapf at a 2 : 1 volume ratio (P-Sapf), peat mixed with Sapf-M at a 2 : 1 volume ratio (P-Sapf-M), Sapf, Sapf-M, and peat. Each of these was analyzed for its ability to produce cherry tomatoes without fertilization. Higher WHC and water-soluble ammonium were found in P-Sapf-M than in P-Sapf. Cherry tomato cultured in P-Sapf-M showed the highest fruit number and yielded 1.04 kg per plant. Fruit firmness, splitting rate, BER incidence, TSS/acidity, and nutrition were all analyzed. After eradication, the mineral concentrations of roots and culture media were also determined. The results of this study show that the bio-inoculated Sapf-M had longer-lasting fertility and greater plant growth-promoting abilities than the Sapf when used as the growing medium for cherry tomato production without further fertilization.

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Crude Oil Degradation by Microorganisms in Soil Composts

Cited by 23 publications

References 7 publications

Optimisation of Environmental Factors on Oil Degrading Bacteria Isolated from Coastal Water and Sediments in Sri Lanka

Optimisation of Environmental Factors on Oil Degrading Bacteria Isolated from Coastal Water and Sediments in Sri Lanka

Crude oil degradation by <i>Bacillus</i> and <i>Micrococcus</i> species isolated from soil compost in Kano, Nigeria

Higher yield of cherry tomato grown in culture medium with microbially inoculated feather compost without fertilizer application

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