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Yarrowia lipolytica and pollutants: Interactions and applications

Paper ID Volume ID Publish Year Pages File Format Full-Text
14296 1205 2014 14 PDF Available
Title
Yarrowia lipolytica and pollutants: Interactions and applications
Abstract

•Yarrowia lipolytica is isolated from different polluted environments.•The yeast degrades aliphatic, aromatic, nitroaromatic and halogenated compounds.•Strains tolerate metals, mediate biosorption and form nanoparticles.•Some isolates reduce COD of wastes or value-added products are obtained.•The yeast is of considerable value in environment-related issues.

Yarrowia lipolytica is a dimorphic, non-pathogenic, ascomycetous yeast species with distinctive physiological features and biochemical characteristics that are significant in environment-related matters. Strains naturally present in soils, sea water, sediments and waste waters have inherent abilities to degrade hydrocarbons such as alkanes (short and medium chain) and aromatic compounds (biphenyl and dibenzofuran). With the application of slow release fertilizers, design of immobilization techniques and development of microbial consortia, scale-up studies and in situ applications have been possible. In general, hydrocarbon uptake in this yeast is mediated by attachment to large droplets (via hydrophobic cell surfaces) or is aided by surfactants and emulsifiers. Subsequently, the internalized hydrocarbons are degraded by relevant enzymes innately present in the yeast. Some wild-type or recombinant strains also detoxify nitroaromatic (2,4,6-trinitrotoluene), halogenated (chlorinated and brominated hydrocarbons) and organophosphate (methyl parathion) compounds. The yeast can tolerate some metals and detoxify them via different biomolecules. The biomass (unmodified, in combination with sludge, magnetically-modified and in the biofilm form) has been employed in the biosorption of hexavalent chromium ions from aqueous solutions. Yeast cells have also been applied in protocols related to nanoparticle synthesis. The treatment of oily and solid wastes with this yeast reduces chemical oxygen demand or value-added products (single cell oil, single cell protein, surfactants, organic acids and polyalcohols) are obtained. On account of all these features, the microorganism has established a place for itself and is of considerable value in environment-related applications.

Keywords
Yarrowia lipolytica; Natural occurrence; Hydrocarbons; Oil degradation; Surfactants; Emulsifiers; Biosorption; Nanoparticles; Waste degradation; Value-added products
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biotechnology Advances - Volume 32, Issue 5, September–October 2014, Pages 920–933
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us