Microbial production of surfactants and their commercial potential.

Desai, J. D.; Banat, İbrahim M.

doi:10.1128/.61.1.47-64.1997

Cited by 1,595 publications

(702 citation statements)

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“…Under these conditions two new rhamnolipid homologues were detected in culture (RL3 and RL4), and the production of such compounds was dependent on the carbon source and incubation temperature (9,24). Besides reaching high yields of products, rhamnolipid production using resting cells contributes to the reduction of recovery costs once the growth and product formation phases can be separate (48).…”

Section: Microbial Productionmentioning

confidence: 97%

Rhamnolipid Surfactants: An Update on the General Aspects of These Remarkable Biomolecules

Nitschke

Costa

Contiero

2005

Biotechnology Progress

269

163

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Pseudomonas strains are able to biosynthesize rhamnose-containing surfactants also known as rhamnolipids. These surface-active compounds are reviewed with respect to chemical structure, properties, biosynthesis, and physiological role, focusing on their production and the use of low-cost substrates such as wastes from food industries as alternative carbon sources. The use of inexpensive raw materials such as agroindustrial wastes is an attractive strategy to reduce the production costs associated with biosurfactant production and, at same time, contribute to the reduction of environmental impact generated by the discard of residues, and the treatment costs. Carbohydrate-rich substrates generated low rhamnolipid levels, whereas oils and lipid-rich wastes have shown excellent potential as alternative carbon sources.

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Section: Microbial Productionmentioning

confidence: 97%

Rhamnolipid Surfactants: An Update on the General Aspects of These Remarkable Biomolecules

Nitschke

Costa

Contiero

2005

Biotechnology Progress

269

163

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“…26 The emulsification index (E24) is a fast and qualitative method to determine the emulsifying properties of a surfactant. 3 Emulsifying and dispersing agents used in food products do not necessarily need the ability to reduce the surface tension of water or of hydrocarbons. Cooper and Paddock 123 for example, analyzing some microbial emulsifiers such as the sophorolipids from Turulopsis bombicola, demonstrated that they have the power to reduce surface and interfacial tension even if they are not be classified as good emulsifiers.…”

Section: Application Of Biosurfactants In Food Industrymentioning

confidence: 99%

“…2 Such properties enable a wide range of industrial applications, including emulsification, detergency, foaming capacity, lubrication, moisture retention, solubilization, and phase dispersion. 3,4 In recent years, surfactants produced by micro-organisms have attracted attention and as an ecologically adaptable, biologically safe, environmental friendly, and effective type of molecules.…”

Section: Introductionmentioning

confidence: 99%

Microbial biosurfactants as additives for food industries

Campos

Stamford

Sarubbo

et al. 2013

Biotechnology Progress

266

109

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Microbial biosurfactants with high ability to reduce surface and interfacial surface tension and conferring important properties such as emulsification, detergency, solubilization, lubrication and phase dispersion have a wide range of potential applications in many industries. Significant interest in these compounds has been demonstrated by environmental, bioremediation, oil, petroleum, food, beverage, cosmetic and pharmaceutical industries attracted by their low toxicity, biodegradability and sustainable production technologies. Despite having significant potentials associated with emulsion formation, stabilization, antiadhesive and antimicrobial activities, significantly less output and applications have been reported in food industry. This has been exacerbated by uneconomical or uncompetitive costing issues for their production when compared to plant or chemical counterparts. In this review, biosurfactants properties, present uses and potential future applications as food additives acting as thickening, emulsifying, dispersing or stabilising agents in addition to the use of sustainable economic processes utilising agro-industrial wastes as alternative substrates for their production are discussed.

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“…They are amphipathic molecules with both hydrophobic and hydrophilic moieties (5) and are capable of reducing surface and interfacial tension (6). Moreover, biosurfactants create micelles, enhancing the solubility of hydrocarbons (such as oil) in water or water in hydrocarbons (5,6). Because of their surface active properties and being environmentally friendly, biosurfactants are of great industrial and commercial interests.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Production of Surfactin from Bacillussubtilis by Addition of Solid Carriers

Yeh

Wei

Chang

2008

Biotechnol Progress

159

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Addition of a small quantity of solid porous carriers (e.g., activated carbon or expanded clay) into fermentation broth significantly increased surfactin production with Bacillus subtilis ATCC 21332. Culture medium containing 25 g L(-1) of activated carbon gave an optimal surfactin yield of 3600 mg L(-1), which was approximately 36-fold higher than that obtained from carrier-free liquid culture. The marked increase in surfactin production was primarily attributed to stimulation of cell growth due to the presence of activated carbon carriers. Concentration of limiting carbon substrate (glucose) is also an important factor affecting the production of surfactin, as an initial glucose concentration of 40 g L(-1) resulted in optimal surfactin production. An appropriate agitation rate also benefited surfactin production, as the best yield appeared at an agitation rate of 200 rpm. Surfactin was purified from fermentation broth via a series of acidic precipitation and solvent extraction. The resulting product was nearly 90% pure with a recovery efficiency of ca. 72%. The purified surfactin reduced the surface tension of water from 72 to 27 mN m(-1) with a critical micelle concentration of ca. 10 mg L(-1). The surfactin product also attained an emulsion index of 70% for kerosene and diesel at a low concentration of 100 and 600 mg L(-1), respectively.

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Microbial production of surfactants and their commercial potential.

Cited by 1,595 publications

References 0 publications

Rhamnolipid Surfactants: An Update on the General Aspects of These Remarkable Biomolecules

Rhamnolipid Surfactants: An Update on the General Aspects of These Remarkable Biomolecules

Microbial biosurfactants as additives for food industries

Enhanced Production of Surfactin from Bacillussubtilis by Addition of Solid Carriers

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