Improved Biosurfactant Production by Bacillus subtilis SPB1 Mutant Obtained by Random Mutagenesis and Its Application in Enhanced Oil Recovery in a Sand System

Bouassida, Mouna; Ghazala, Imen; Ellouze-Chaâbouni, Semia; Ghribi, Dhouha

doi:10.4014/jmb.1701.01033

Cited by 50 publications

(19 citation statements)

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“…As a direct consequence of its exposure to TCDD, BmA14K exhibited a morphological and biophysical profile typified by high levels of biosurfactant production, surface hydrophobicity and cell membrane permeability. This is consistent with earlier reports demonstrating such behavior in B. megaterium (Thavasi et al 2008(Thavasi et al , 2011 and other microorganisms (Bouassida et al 2018;Paraszkiewicz et al 2018;Plaza et al 2016;Hanano et al 2015d).…”

Section: Effects Of Dioxins On Lipid Metabolism In Soil Microorganismssupporting

confidence: 94%

Dioxin impacts on lipid metabolism of soil microbes: towards effective detection and bioassessment strategies

Mahfouz

Mansour

Murphy

et al. 2020

Bioresour. Bioprocess.

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Dioxins are the most toxic known environmental pollutants and are mainly formed by human activities. Due to their structural stability, dioxins persist for extended periods and can be transported over long distances from their emission sources. Thus, dioxins can be accumulated to considerable levels in both human and animal food chains. Along with sediments, soils are considered the most important reservoirs of dioxins. Soil microorganisms are therefore highly exposed to dioxins, leading to a range of biological responses that can impact the diversity, genetics and functional of such microbial communities. Dioxins are very hydrophobic with a high affinity to lipidic macromolecules in exposed organisms, including microbes. This review summarizes the genetic, molecular and biochemical impacts of dioxins on the lipid metabolism of soil microbial communities and especially examines modifications in the composition and architecture of cell membranes. This will provide a useful scientific benchmark for future attempts at soil ecological risk assessment, as well as in identifying potential dioxin-specific-responsive lipid biomarkers. Finally, potential uses of lipid-sequestering microorganisms as a part of biotechnological approaches to the bio-management of environmental contamination with dioxins are discussed.

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Section: Effects Of Dioxins On Lipid Metabolism In Soil Microorganismssupporting

confidence: 94%

Dioxin impacts on lipid metabolism of soil microbes: towards effective detection and bioassessment strategies

Mahfouz

Mansour

Murphy

et al. 2020

Bioresour. Bioprocess.

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“…In the present study, it was found that BS or BE were produced by bacteria (KOMA et al, 2001;KREPSKY et al, 2007;RAJESH et al, 2017;BOUASSIDA et al, 2018), followed by yeasts (SARUBBO et al, 2001;VANCE-HARROP et al, 2003;AMARAL et al, 2008;KATEMAI, 2012), and rarely by filamentous fungi (BATRAKOV et al, 2001;KATEMAI et al, 2008;KIRAN et al, 2009;SILVA et al, 2014;PELE et al, 2018).…”

Section: Introductionsupporting

confidence: 45%

Biosurfactant production by fungi as a sustainable alternative

et al. 2018

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A wide variety of bacteria is far more exploited than fungi as biosurfactants (BS) or bioemulsifiers (BE), using renewable sources. BS are considered to be environmentally safe and offer advantages over synthetic surfactants. However, the BS yield depends largely on the metabolic pathways of the microorganisms and the nutritional medium. The production of BS or BE uses several cultural conditions, in which a small change in carbon and nitrogen sources affects the quantity of BS or BE produced. The type and quantity of microbial BS or BE produced depend mainly on the producer organism, and factors such as carbon and nitrogen sources, trace elements, temperature and aeration. The diversity of BS or BE makes it interesting to apply them in the pharmaceutical and cosmetics industries, agriculture, public health, food processes, detergents, when treating oily residues, environmental pollution control and bioremediation. Thus, this paper reviews and addresses the biotechnological potential of yeasts and filamentous fungi for producing, characterizing and applying BS or BE.

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“…The use of agroindustrial residues as a low-cost raw material for the microbial production of bioemulsifiers is a well-explored strategy in the field of biotechnology to reduce production costs and put into practice current environmental policies [19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

An Efficient Bioemulsifier-Producing Bacillus subtilis UCP 0146 Isolated from Mangrove Sediments

Maia

Santos

Fereira

et al. 2018

Colloids and Interfaces

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In this work, we investigated the potential of Bacillus subtilis UCP 0146 in the bioconversion of a medium containing 100% cassava flour wastewater to obtain a bioemulsifier. The evaluation of the production was carried out by the emulsification index (IE24) and the surface tension (ST). The ionic charge, stability (temperature, salinity, and pH measured by IE24 and viscosity), and ability to remove and disperse oil and textile dye were investigated. B. subtilis produced an anionic bioemulsifier in the medium containing 100% cassava wastewater under Condition 4 of the factorial design (inoculum 9% at a temperature of 35 °C and shaken at 100 rpm), and showed a surface tension of 39 mN/m, an IE24 of 95.2%, and a yield of 2.69 g·L−1. The bioemulsifier showed stability at different pH (2–8), temperatures (0–120 °C), and NaCl concentrations, a dispersion oil displacement area (ODA) test of 55.83 cm2, and a reduction of the viscosity of the burned engine oil (90.5 Cp). The bioemulsifier was able to remove petroleum (94.4%) and methylene blue azo dye (62.2%). The bioemulsifier and its synthesis from bacteria also emphasizes the role of surfactants in oil remediation.

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Improved Biosurfactant Production by Bacillus subtilis SPB1 Mutant Obtained by Random Mutagenesis and Its Application in Enhanced Oil Recovery in a Sand System

Cited by 50 publications

References 0 publications

Dioxin impacts on lipid metabolism of soil microbes: towards effective detection and bioassessment strategies

Dioxin impacts on lipid metabolism of soil microbes: towards effective detection and bioassessment strategies

Biosurfactant production by fungi as a sustainable alternative

An Efficient Bioemulsifier-Producing Bacillus subtilis UCP 0146 Isolated from Mangrove Sediments

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