A non-toxic microbial surfactant from Marinobacter hydrocarbonoclasticus SdK644 for crude oil solubilization enhancement

Zenati, Billal; Chebbi, Alif; Badis, Abdelmalek; Eddouaouda, Kamel; Boutoumi, Hocine; Hattab, Mohamed El; Hentati, Dorra; Chelbi, Manel; Sayadi, Sami; Chamkha, Mohamed; Franzetti, Andrea

doi:10.1016/j.ecoenv.2018.02.032

Cited by 46 publications

(25 citation statements)

References 53 publications

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“…The high production costs and low yields still hamper the industrial production of biosurfactants (Marchant & Banat, 2012). Hence, exploring the use of cheap waste materials for biosurfactants production is an effective cost-cutting strategy, since the use of low-cost renewable substrates may decrease 10 % to 30 % of the total production costs (Zenati et al, 2018).…”

Section: Biosurfactantsmentioning

confidence: 99%

Microbial valorization of waste cooking oils for valuable compounds production – a review

Lopes

Miranda

Belo

2019

Critical Reviews in Environmental Science and Technology

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Waste cooking oils (WCO) are vegetable oils discarded after food frying and great amounts are produced worldwide. Its management is a challenge, due to the environmental risk of illegally disposal into rivers and landfills. The main approaches for WCO valorization included their incorporation as component of animal feed and biodiesel manufacturing. Yet, the development of new feasible approaches is attractive from an economic and ecological standpoint. Due to their composition in triglycerides, untreated WCO can be used as feedstock for microbial growth (several species are able to use them as carbon source) and production of added-value compounds. In this way, microbial valorization of WCO is a sustainable biotechnological approach to upgrade a waste into a renewable feedstock for bio-based industry, favoring the circular economy concept. The objective of this review is to highlight the potential use of WCO in bioprocesses as an alternative to other physicochemical treatments. Firstly, an introduction to WCO problematic is presented, describing most common applications used currently. Then, an extensive review on the use of WCO by microorganisms is shown, focusing on bacterial and fungi species and its exploitation for bioprocesses development to produce metabolites of industrial interest, such as biopolymers, biosurfactants, lipases and microbial lipids. KEYWORDS Added-value compounds; microbial conversion; waste cooking oils 1. Waste cooking oils: General overview Waste cooking oils (WCO) are generated from vegetable oils (coconut, sunflower, soybean, palm tree, cottonseed, rapeseed, olive, etc.) employed to fry foods in household and HORECA (Hotels, Restaurants and Catering) segments and are no longer suitable for human consumption. Specifically, in HORECA sector, fast food restaurants (particularly those of chicken and

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Section: Biosurfactantsmentioning

confidence: 99%

Microbial valorization of waste cooking oils for valuable compounds production – a review

Lopes

Miranda

Belo

2019

Critical Reviews in Environmental Science and Technology

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“…A notable feature of Marinobacter hydrocarbonoclasticus is the utilization of various hydrocarbons as sole carbon and energy sources [32]. For example, using waste frying oil as the inducer carbon source, the produced biosurfactant of the strain Marinobacter hydrocarbonoclasticus SdK644 could be applied to improve crude-oil solubilization in a marine environment [33]. Therefore, strain RAD-2 might have the ability to use biodegradable polymers (PHBV etc.)…”

Section: Characteristics and Identificationmentioning

confidence: 99%

Denitrification-Potential Evaluation and Nitrate-Removal-Pathway Analysis of Aerobic Denitrifier Strain Marinobacter hydrocarbonoclasticus RAD-2

Kong

Deng

et al. 2018

Water

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An aerobic denitrifier was isolated from a long-term poly (3-hydroxybutyrate-co-3hydroxyvalerate) PHBV-supported denitrification reactor that operated under alternate aerobic/anoxic conditions. The strain was identified as Marinobacter hydrocarbonoclasticus RAD-2 based on 16S rRNA-sequence phylogenetic analysis. Morphology was observed by scanning electron microscopy (SEM), and phylogenetic characteristics were analyzed with the API 20NE test. Strain RAD-2 showed efficient aerobic denitrification ability when using NO 3 − -N or NO 2 − -N as its only nitrogen source, while heterotrophic nitrification was not detected. The average NO 3 − -N and NO 2 − -N removal rates were 6.47 mg/(L·h)and 6.32 mg/(L·h), respectively. Single-factor experiments indicated that a 5:10 C/N ratio, 25-40 • C temperature, and 100-150 rpm rotation speed were the optimal conditions for aerobic denitrification. Furthermore, the denitrifying gene napA had the highest expression on a transcriptional level, followed by the denitrifying genes nirS and nosZ. The norB gene was found to have significantly low expression during the experiment. Overall, great aerobic denitrification ability makes the RAD-2 strain a potential alternative in enhancing nitrate management for marine recirculating aquaculture system (RAS) practices.

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“… Marinobacter is an abundant taxon widely distributed in various salty environments, such as seawater [1], marine sediment [2], tidal flat [3], marine oil well [4], marine animal and alga [5, 6], salty industrial wastewater [7], coastal saltern [8], sea sand [9], saline soil [10] and salt lake [11]. Marinobacter strains have aroused interest because of their characteristics and potential for denitrification [12], algicidal activity [13], degrading hydrocarbons and polycyclic aromatic hydrocarbons (PAHs) [14, 15], and producing enzymes [16], surfactants [17], antioxidants [18], polyunsaturated fatty acids (PUFAs) [19], esters and wax [20, 21].…”

Section: Full-textmentioning

confidence: 99%

Marinobacter denitrificans sp. nov., isolated from marine sediment of southern Scott Coast, Antarctica

Zhang

et al. 2020

International Journal of Systematic and Evolutionary Microbiology

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The complete 16S rRNA gene sequence and draft genome of Marinobacter denitrificans JB02H27 T have been deposited in GenBank under accession numbers MN203987 and VMHN00000000, respectively. The draft genome sequences of Marinobacter confluentis KCTC 42705 T and Marinobacter halotolerans NBRC 110910 T have been deposited in GenBank under accession numbers VMHO00000000 and VMHP00000000, respectively. †These authors contributed equally to this work One supplementary table and three supplementary figures are available with the online version of this article.

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A non-toxic microbial surfactant from Marinobacter hydrocarbonoclasticus SdK644 for crude oil solubilization enhancement

Cited by 46 publications

References 53 publications

Microbial valorization of waste cooking oils for valuable compounds production – a review

Microbial valorization of waste cooking oils for valuable compounds production – a review

Denitrification-Potential Evaluation and Nitrate-Removal-Pathway Analysis of Aerobic Denitrifier Strain Marinobacter hydrocarbonoclasticus RAD-2

Marinobacter denitrificans sp. nov., isolated from marine sediment of southern Scott Coast, Antarctica

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