Continuous production of the lipopeptide biosurfactant of Bacillus licheniformis JF-2

Lin, Shao-Pow; Sharma, Mukul M.; Carswell, Kathleen S.; Georgiou, George

doi:10.1007/s002530050144

Cited by 13 publications

(20 citation statements)

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“…Growth-associated production of biosurfactant has been reported for Bacillus licheniformis JF-2 (Lin et al 1994), B. subtilis C9 (Kim et al 1997) and B. subtilis LAMI005 (de Oliveira et al 2013;Sousa et al 2014;). A direct relationship between biosurfactant production, cell growth and carbohydrate utilization was observed during the production of biosurfactant by B. subtilis C9 (Kim et al 1997).…”

Section: Kinetics Of Surfactin Production By B Subtilis Msh1 and B mentioning

confidence: 99%

Kinetics of Surfactin Production by Bacillus subtilis in a 5 L Stirred-tank Bioreactor

Mubarak

Jufri

Zahar

et al. 2017

JSM

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Section: Kinetics Of Surfactin Production By B Subtilis Msh1 and B mentioning

confidence: 99%

Kinetics of Surfactin Production by Bacillus subtilis in a 5 L Stirred-tank Bioreactor

Mubarak

Jufri

Zahar

et al. 2017

JSM

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“…However, many authors documented that, unlike the microorganisms producing glycolipid, polymeric, or fatty acid type biosurfactants, Bacillus sp. requires only carbohydrates to produce lipopeptide-type biosurfactant [34,35,36,37,38]. The fact that some biosurfactants are produced even when the cells are not grown on hydrophobic substrates suggests that their function is not solely restricted to the stimulation of substrate availability but they perform other defensive and biological functions [39].…”

Section: Effect Of Different Medium Components On Surfactin Productionmentioning

confidence: 99%

Optimization of Surfactin Production by Bacillus subtilis Isolate BS5

Abdel-Mawgoud

Aboulwafa

Hassouna

2008

Appl Biochem Biotechnol

135

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Bacillus subtilis BS5 is a soil isolate that produces promising yield of surfactin biosurfactant in mineral salts medium (MSM). It was found that cellular growth and surfactin production in MSM were greatly affected by the environmental fermentation conditions and the medium components (carbon and nitrogen sources and minerals). Optimum environmental conditions for high surfactin production on the shake flask level were found to be a slightly acidic initial pH (6.5-6.8), an incubation temperature of 30 degrees C, a 90% volumetric aeration percentage, and an inoculum size of 2% v/v. For media components, it was found that the optimum carbon source was molasses (160 ml/l), whereas the optimum nitrogen source was NaNO(3) (5 g/l) and the optimum trace elements were ZnSO(4).7H(2)O (0.16 g/l), FeCl(3).6H(2)O (0.27 g/l), and MnSO(4).H(2)O (0.017 g/l). A modified MSM (molasses MSM), combining the optimum medium components, was formulated and resulted in threefold increase in surfactin productivity that reached 1.12 g/l. No plasmid could be detected in the tested isolate, revealing that biosurfactant production by B. subtilis isolate BS5 is chromosomally mediated but not plasmid-mediated.

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“…Emulsan reduced the viscosity of Boscon heavy crude oil from 200,000 cP to 100 cP, facilitating heavy oil pumping (246). Biosurfactant from the thermo-and halotolerant species, Bacillus licheniformis isolates and thermotolerant Bacillus subtilis strains have been tested for with various levels of success in reservoirs and in laboratory simulations (285,385,400,674,675).…”

Section: Microbial Processes For Recovering and Upgrading Petroleum Mmentioning

confidence: 99%

Recent Advances in Petroleum Microbiology

Hamme¹,

Singh

Ward

2003

Microbiol Mol Biol Rev

1,201

640

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Recent advances in molecular biology have extended our understanding of the metabolic processes related to microbial transformation of petroleum hydrocarbons. The physiological responses of microorganisms to the presence of hydrocarbons, including cell surface alterations and adaptive mechanisms for uptake and efflux of these substrates, have been characterized. New molecular techniques have enhanced our ability to investigate the dynamics of microbial communities in petroleum-impacted ecosystems. By establishing conditions which maximize rates and extents of microbial growth, hydrocarbon access, and transformation, highly accelerated and bioreactor-based petroleum waste degradation processes have been implemented. Biofilters capable of removing and biodegrading volatile petroleum contaminants in air streams with short substrate-microbe contact times (<60 s) are being used effectively. Microbes are being injected into partially spent petroleum reservoirs to enhance oil recovery. However, these microbial processes have not exhibited consistent and effective performance, primarily because of our inability to control conditions in the subsurface environment. Microbes may be exploited to break stable oilfield emulsions to produce pipeline quality oil. There is interest in replacing physical oil desulfurization processes with biodesulfurization methods through promotion of selective sulfur removal without degradation of associated carbon moieties. However, since microbes require an environment containing some water, a two-phase oil-water system must be established to optimize contact between the microbes and the hydrocarbon, and such an emulsion is not easily created with viscous crude oil. This challenge may be circumvented by application of the technology to more refined gasoline and diesel substrates, where aqueous-hydrocarbon emulsions are more easily generated. Molecular approaches are being used to broaden the substrate specificity and increase the rates and extents of desulfurization. Bacterial processes are being commercialized for removal of H2S and sulfoxides from petrochemical waste streams. Microbes also have potential for use in removal of nitrogen from crude oil leading to reduced nitric oxide emissions provided that technical problems similar to those experienced in biodesulfurization can be solved. Enzymes are being exploited to produce added-value products from petroleum substrates, and bacterial biosensors are being used to analyze petroleum-contaminated environments

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Continuous production of the lipopeptide biosurfactant of Bacillus licheniformis JF-2

Cited by 13 publications

References 0 publications

Kinetics of Surfactin Production by Bacillus subtilis in a 5 L Stirred-tank Bioreactor

Kinetics of Surfactin Production by Bacillus subtilis in a 5 L Stirred-tank Bioreactor

Optimization of Surfactin Production by Bacillus subtilis Isolate BS5

Recent Advances in Petroleum Microbiology

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