Biodegradation of crude petroleum oil and environmental pollutants by Candida tropicalis strain

Farag, Soha; Soliman, Nadia A.

doi:10.1590/s1516-89132011000400023

Cited by 52 publications

(24 citation statements)

References 24 publications

(25 reference statements)

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“…Different fungal mechanisms determined the bioavailability of organic soil-sorbed pollutants, like: biosurfactants production, extracellular enzymes excretion, cometabolism, high substrate affinity (low Km), high Vmax and cell adhesion to particles [27][28][29]. SLP had been especially reported in Candida spp.…”

Section: Resultsmentioning

confidence: 99%

“…Yeasts are preferred than others microorganisms for biosurfactants due to their GRAS (generally regarded as safe) status, that is, they do not induce [30,36], Candida batistae [37], Candida glabrata [38], Candida kuoi [39], Candida tropicalis [26,27], Pichia anomala [2,40], Hansenula angusta [17], Rhodotorula bogoriensis [32,41], Rhodotorula minuta [17], Rhodotorula glutinis [33,42] and Wickerhamiella domercqiae [43,44] had been confirmed as SLP producers.…”

Section: Resultsmentioning

confidence: 99%

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Sorbed Anthracene Degradation by Sophorolipid Producing Yeasts

Romero¹,

Chiaravalli²,

Reinoso³

2016

Int. J. Biotech. Well. Indus.

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The organic pollutan adsorption/desorption process by microbial degradation had been less studied than metal ones. The sorption assays alone did not predict desorption, due to hysteresis, irreversibility, fixed compounds in different sites, with diverse desorption rates. Most of the studies dealt with bacteria rather than filamentous fungi and yeasts. So, our aims were to isolate yeasts from polluted sediments, to quantify its potential to uptake anthracene (An) and to evaluate the bioavailability by a desorption model. Yeasts were isolated from hydrocarbon-polluted samples, 40isolates grew in anthracene-plates. Molecular characterization was achieved by sequence analysis of the ITS1-5.8S rRNA-ITS4 and 26S rRNA regions; morphological and physiological determination were also done. Candida parasilopsis, Pichia anomala and Rhodothorula mucilaginosa were the prevalent yeasts. An-degradation was assessed in soilsystems with 0, 50, 100, 150, 200 and 250 μg An/l, 3 differentes sorbens types, organic carbon, organic nitrogen, PAHs, sand:silt:clay, pH and cation exchange capacity. Sophorolipids excretion were confirmed by HPLC, UV-detector with active fraction at 9.669 min (RT 9.646 min = sophorolipid-standard). A desorption model with equilibrium, nonequilibrium and nondesorption areas, was applied to explain the experimental data, An-transformation was greater in the organic liquid-phase than in the soil-sorbed ones; the desorption-coefficients and soil components were negatively correlated with the kinetic parameters. The An-release depended on the sophorolipid excretion, soil matrix and particles sizes. Desorption parameters significantly fitted the yeast uptake, with R 2 = 0.97, R 2 = 0.90 and R 2 = 0.97 for C. parasilopsis, P. anomala and R. mucilaginosa, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Sorbed Anthracene Degradation by Sophorolipid Producing Yeasts

Romero¹,

Chiaravalli²,

Reinoso³

2016

Int. J. Biotech. Well. Indus.

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“…2017, 9(6S), 214-226 218 biodegradation performance. The parameters involved posed a significant impact on biodegradation of pollutant [9,[21][22][23]. The optimum conditionsfor biodegradation process result in maximum pollutant degradation.…”

Section: Removal and Biodegradability Of Pah And Anthracenementioning

confidence: 99%

Occurrence and bioremediation of anthracene in the environment

Abidin

Talib

Alias

et al. 2018

J. Fundam and Appl Sci.

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Occurrence of PAH in the environment has been a concern of many env obstinac, toxicity and harm that it may impose. Anthracene is a common low molecular weight PAH that is often used as a model PAH in bioremediation study found in high molecular weight PAH PAH and specifically, anthracene. Due to the harm that they impose, several methods have been applied to overcome the problem, including opting for on the bioremediation process involving microorganisms and the respective enzymes secreted during the process. Proposed mechanism on degradation of anthracene by bacteria and fungus are also included. The paper will further leads to gaps of study and to the direction for future study and applications.

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“…One of yeast strains that widely studied for their ability to degrade environmental contaminants is C. tropicalis. Several studied have been carried out to investigate the ability of C. tropicalis to biodegrade hydrocarbon compound such as toluene [4,5], phenol [6,7], polycyclic aromatic hydrocarbon (PAH) [8] and petroleum oil [9][10][11][12]. In this study, benzene has been chosen as the model of VOC to be treated with a biological method by using yeast strain C. tropicalis.…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of Benzene Gas by Candida Tropicalis in Batch Experiment

Nik Mut,

Yuzir*,

Higuchi

et al. 2019

IJITEE

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Three sets of batch experiments with different concentration of feed were conducted to observe the biodegradability of benzene gas by yeast strain Candida tropicalis. During the first phase of this study, C. tropicalis was grown in a nutrient solution containing only toluene and benzene as its sole carbon source in an acclimation experiment. There was a delay in the rate of the microbial growth following the nutrient changes, however, the optical density of C. tropicalis reached over 1.200 OD600nm within 9 days of incubation. There was also a positive result of protein and sugar test that proved there were microbial activities happening during the incubation of C. tropicalis with benzene gas as its sole carbon source. The acclimated culture was further studied in a batch experiment of biodegradation. It was found that C. tropicalis managed to remove over 90% of benzene fed within 100 hours of incubation during the batch study

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Biodegradation of crude petroleum oil and environmental pollutants by Candida tropicalis strain

Abstract: A local yeast isolate named A was isolated from polluted area of

Cited by 52 publications

References 24 publications

Sorbed Anthracene Degradation by Sophorolipid Producing Yeasts

Sorbed Anthracene Degradation by Sophorolipid Producing Yeasts

Occurrence and bioremediation of anthracene in the environment

Biodegradation of Benzene Gas by Candida Tropicalis in Batch Experiment

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