Rhamnolipid production by Pseudomonas aeruginosa grown on membranes of bacterial cellulose supplemented with corn bran water extract

Conceição, Karen Stefany; Almeida, Mayara de Alencar; Sawoniuk, Isadora Caroline; Marques, Gabriela Dornelas; Faria-Tischer, Paula Cristina de Sousa; Tischer, César Augusto; Vignoli, Josiane Alessandra; Camilios-Neto, Doumit

doi:10.1007/s11356-020-09315-w

Cited by 10 publications

(3 citation statements)

References 41 publications

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“…Therefore, the fast agitation speed and the high ventilatory capacity were needed to meet the oxygen supply at the early stable growth phase (Figure 2b). Based on the previous results reported by Conceicao et al [33], static submerged cultivation was beneficial to surfactant production because of the decrease in foam formation. Therefore, air entrapment is also positively associated with foam formation (Figure 2b).…”

Section: The Relationships Between Foams and The Key Factors Involved...mentioning

confidence: 81%

Controlling the Formation of Foams in Broth to Promote the Co-Production of Microbial Oil and Exopolysaccharide in Fed-Batch Fermentation

Guo

Wang

et al. 2022

Fermentation

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A large amount of foam is generated in the production of microbial oil and exopolysaccharide (EPS) by Sporidiobolus pararoseus JD-2, which causes low efficiency in fermentation. In this study, we aimed to reduce the negative effects of foams on the co-production of oil and EPS by controlling the formation of foams in broth. As we have found, the formation of foams is positively associated with cell growth state, air entrapment, and properties of broth. The efficient foam-control method of adding 0.03% (v/v) of the emulsified polyoxyethylene polyoxypropylene pentaerythritol ether (PPE) and feeding corn steep liquor (CSL) at 8–24 h with speed of 0.02 L/h considerably improved the fermentation performance of S. pararoseus JD-2, and significantly increased the oil and EPS concentrations by 8.7% and 12.9%, respectively. The biomass, oil, and EPS concentrations were further increased using a foam backflow device combined with adding 0.03% (v/v) of the emulsified PPE and feeding CSL at 8–24 h, which reached to 62.3 ± 1.8 g/L, 31.2 ± 0.8 g/L, and 10.9 ± 0.4 g/L, respectively. The effective strategy for controlling the formation of foams in fermentation broth reported here could be used as a technical reference for producing frothing products in fed-batch fermentation.

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Section: The Relationships Between Foams and The Key Factors Involved...mentioning

confidence: 81%

Controlling the Formation of Foams in Broth to Promote the Co-Production of Microbial Oil and Exopolysaccharide in Fed-Batch Fermentation

Guo

Wang

et al. 2022

Fermentation

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“…30 There are not many studies about biosurfactant produce ability by Pseudomonas mendocina and Pseudomonas oleovorans. In contrary, different investigations study the production of biosurfactant from different Pseudomonas spices such as: Pseudomonas aeruginosa, [31][32][33] Pseudomonas nitroreducens, 34 Pseudomonas fluorescens, 35 Pseudomonas putida 36 and Pseudomonas balearica. 10 Distinct nutritional factors and growth parameters were selected to investigate their effect on biosurfactant production by chosen isolates Ps.…”

Section: Original Effect Of Nutritional Factors and Growth Conditions...mentioning

confidence: 99%

Effect of nutritional factors and growth conditions on biosurfactant production by Pseudomonas mendocina and Pseudomonas oleovorans isolated from oil contaminated soil in Jeddah city

Motwali,

Aly,

Qari

et al. 2021

J. Contemp. Med. Sci.

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Objectives:The current study aimed to investigate the impact of different nutritional factors and growth conditions on biosurfactant production by bacterial isolates (EMB16 and EMB21) isolated from oil-contaminated soil samples. Methods: Based on the used quantitative and qualitative screening method in current study, the selected bacterial isolates showed a high potential to produce biosurfactant. Results: By using 16S rRNA sequence analysis, the bacterial isolates EMB16 and EMB21 were found to be closely related to Pseudomonas mendocina and Pseudomonas oleovorans, respectively. The ultimate yields of biosurfactant (8.06 ± 0.06 mg/ml) by Ps. mendocina EMB16 was with corn oil as a carbon source, urea as a nitrogen source, C/N ratio of 30, pH value of 7, and 2% inoculum size. For Ps. oleovorans EMB21, the maximum biosurfactant production (4.68 ± 0.14 mg/ml) was achieved by diesel oil as a carbon source, urea as a nitrogen source, C/N ratio of 30, pH of 7, and 5% size of inoculum. The best incubation period and temperature for the examined strains was 168 hrs. at 37°C. Conclusion:The results proved that Ps. mendocina EMB16 was the most efficient biosurfactant producer as it showed the greatest amount of biosurfactant concentration and lowest value of surface tension measurement with an emulsification index of 67 ± 6%.

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“…Surfactants are amphiphilic molecules that help to reduce interfacial tension between two different phases (solid-liquid, air-liquid and liquid-liquid) and allow them to mix and interact more easily (Jiménez-Peñalver et al, 2019;Conceição et al, 2020). Based on surface properties and chemical structure, surfactants can act as wetting agents, dispersants, detergents, foaming agents and emulsifiers (Varjani and Upasani, 2017b;Moshtagh et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Bio-based rhamnolipids production and recovery from waste streams: Status and perspectives

Varjani

Rakholiya

et al. 2021

Bioresource Technology

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Rhamnolipid production by Pseudomonas aeruginosa grown on membranes of bacterial cellulose supplemented with corn bran water extract

Cited by 10 publications

References 41 publications

Controlling the Formation of Foams in Broth to Promote the Co-Production of Microbial Oil and Exopolysaccharide in Fed-Batch Fermentation

Controlling the Formation of Foams in Broth to Promote the Co-Production of Microbial Oil and Exopolysaccharide in Fed-Batch Fermentation

Effect of nutritional factors and growth conditions on biosurfactant production by Pseudomonas mendocina and Pseudomonas oleovorans isolated from oil contaminated soil in Jeddah city

Bio-based rhamnolipids production and recovery from waste streams: Status and perspectives

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