Factors influencing crude oil biodegradation by Yarrowia lipolytica

Ferreira, Tatiana Felix; Coelho, Maria Alice Zarur; Rocha-Leão, Maria Helena M.

doi:10.1590/s1516-89132012000500019

Cited by 13 publications

(10 citation statements)

References 13 publications

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“…In the report of Ferreira et al., [ 2 ] for example, the initial cell concentration had a positive effect, whereas the initial petroleum concentration had a negative effect on the crude oil removal. Similarly, an excessively high hydrocarbon concentration could decrease the degradation ability of the bacterium Bacillus fusiformis sp.…”

Section: Resultsmentioning

confidence: 99%

“…Bioremediation processes preferentially proceed at a pH range of 6–9. [ 2 ] Severe changes of pH, such as strong acidic or alkaline conditions, damage the normal functions of membrane channel proteins, transporters and signalling pathway proteins, causing cells to lose the function of permselectivity. For the trans-membrane transport of n -octadecane by Pseudomonas sp.…”

Section: Resultsmentioning

confidence: 99%

“…[ 1 ] Meanwhile, the intensity of petroleum biodegradation is influenced by several environmental factors, such as temperature, oxygen, pH value, salinity, nutrients, concentration of contaminant, aqueous solubility and the concentration of microorganisms in the affected site. [ 2–4 ] On the other hand, different microorganisms adapt to different optimal environmental factors. Some can grow well under saline, acidic or alkaline conditions, or in a cold environment, while others cannot survive in extreme environments.…”

Section: Introductionmentioning

confidence: 99%

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Factors influencing the trans-membrane transport ofn-octadecane byPseudomonassp. DG17

Fei

Wang

Zhao

2014

Biotechnology & Biotechnological Equipment

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In soil bioremediation techniques, the trans-membrane transport of hydrocarbons across the cell membrane is a new and complex point of understanding the process of hydrocarbons biodegradation. In this study, the effect of different environmental factors, including substrate concentration, bacterial inoculums, pH, salinity, substrate analogues and nutrients, on the transport of [14C]n-octadecane by Pseudomonas sp. DG17 was investigated. The results showed that cellular [14C]n-octadecane levels increased along with the increase in the substrate concentration. However, the trans-membrane transport of [14C]n-octadecane was a saturable process in the case of equal amounts of inoculum (biomass). The highest concentration of accumulated [14C]n-octadecane was 0.51 μmol mg−1 ± 0.028 μmol mg−1 after incubation for 20 min. Meanwhile, the cellular n-octadecane concentration decreased along with the biomass increase, and reached a stable level. Acidic/alkaline conditions, high salinity, and supplement of substrate analogues could inhibit the transport of [14C]n-octadecane by Pseudomonas sp. DG17, whereas nitrogen or phosphorus deficiency did not influence this transport. The results suggested that trans-membrane transport of octadecane depends on both the substrate concentration and the microorganism biomass, and extreme environmental conditions could influence the biodegradation ability of microorganisms through inhibiting the transport of extracellular octadecane.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Factors influencing the trans-membrane transport ofn-octadecane byPseudomonassp. DG17

Fei

Wang

Zhao

2014

Biotechnology & Biotechnological Equipment

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“…ere are several bacterial genera that are tested for the degradation of hydrocarbon (Table 2). e most known hydrocarbon degrader bacteria belong to the genus of Pseudomonas, Bacillus, Sphingomonas, Rhodococcus, Alcaligenes, and so on [7,24,27,63,[68][69][70][71]. ose bacteria can usually metabolize only a limited range of hydrocarbon substrates.…”

Section: Bacterial Community Structure and Diversity/microbialmentioning

confidence: 99%

Factors Influencing the Bacterial Bioremediation of Hydrocarbon Contaminants in the Soil: Mechanisms and Impacts

Kebede

Tafese

Abda

et al. 2021

Journal of Chemistry

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The discharge of hydrocarbons and their derivatives to environments due to human and/or natural activities cause environmental pollution (soil, water, and air) and affect the natural functioning of an ecosystem. To minimize or eradicate environmental pollution by hydrocarbon contaminants, studies showed strategies including physical, chemical, and biological approaches. Among those strategies, the use of biological techniques (especially bacterial biodegradation) is critically important to remove hydrocarbon contaminants. The current review discusses the insights of major factors that enhance or hinder the bacterial bioremediation of hydrocarbon contaminants (aliphatic, aromatic, and polyaromatic hydrocarbons) in the soil. The key factors limiting the overall hydrocarbon biodegradation are generally categorized as biotic factors and abiotic factors. Among various environmental factors, temperature range from 30 to 40°C, pH range from 5 to 8, moisture availability range from 30 to 90%, carbon/nitrogen/phosphorous (C/N/P; 100:20:1) ratio, and 10–40% of oxygen for aerobic degradation are the key factors that show positive correlation for greatest hydrocarbon biodegradation rate by altering the activities of the microbial and degradative enzymes in soil. In addition, the formation of biofilm and production of biosurfactants in hydrocarbon-polluted soil environments increase microbial adaptation to low bioavailability of hydrophobic compounds, and genes that encode for hydrocarbon degradative enzymes are critical for the potential of microbes to bioremediate soils contaminated with hydrocarbon pollutants. Therefore, this review works on the identification of factors for effective hydrocarbon biodegradation, understanding, and optimization of those factors that are essential and critical.

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“…Bioremediation technologies generally aim at providing favorable conditions of oxygen, temperature, nutrients, aqueous solubility, and the concentration of microorganisms in the impacted site to enhance biological hydrocarbon breakdown (Rahman et al 2002;Rosa et al 2013;Ferreira et al 2012;Mrozik and Piotrowska-Seget 2010). For example, low concentration of substrates was one likely reason for failure of biodegradation process for the acclimation period before mineralization of substrates was lengthened (Goldstein et al 1985;Wiggins and Alexander 1988).…”

Section: Introductionmentioning

confidence: 99%

Pseudosolubilized n-alkanes analysis and optimization of biosurfactants production by Pseudomonas sp. DG17

Fei

Wang

Zhao

et al. 2014

Environ Sci Pollut Res

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The pseudosolubilized medium-chain-length n-alkanes during biodegradation process, and optimization of medium composition and culture conditions for rhamnolipid production by Pseudomonas sp. DG17 using Plackett-Burman design and Box-Behnken design, were examined in this study. The results showed that pseudosolubilized concentration of C14 to C20 n-alkanes was higher than that of C24 to C26. After incubation for 120 h, pseudosolubilized C16H34 increased to 2.63 ± 0.21 mg. Meanwhile, biodegradation rates of n-alkanes decreased along with the increase of carbon chain length. Carbon-14 assay suggested that nonlabeled C14H30, C16H34, and C20H42 inhibited the biodegradation of (14)C n-octadecane, and Pseudomonas sp. DG17 utilized different alkanes simultaneously. Three significant variables (substrate concentration, salinity, and C/N) that could influence rhamnolipid production were screened by Plackett-Burman design. Results of Box-Behnken design suggested that rhamnolipid concentration could be achieved at 91.24 mg L(-1) (observed value) or 87.92 mg L(-1) (predicted value) with the optimal levels of concentration, salinity, and C/N of 400 mg L(-1), 1.5 %, and 45, respectively.

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Factors influencing crude oil biodegradation by Yarrowia lipolytica

Abstract: ABSTRACT

Cited by 13 publications

References 13 publications

Factors influencing the trans-membrane transport ofn-octadecane byPseudomonassp. DG17

Factors influencing the trans-membrane transport ofn-octadecane byPseudomonassp. DG17

Factors Influencing the Bacterial Bioremediation of Hydrocarbon Contaminants in the Soil: Mechanisms and Impacts

Pseudosolubilized n-alkanes analysis and optimization of biosurfactants production by Pseudomonas sp. DG17

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