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The olive mill wastewater as substrate for single cell oil production by Zygomycetes

Paper ID Volume ID Publish Year Pages File Format Full-Text
23266 43426 2014 10 PDF Available
Title
The olive mill wastewater as substrate for single cell oil production by Zygomycetes
Abstract

•Cultivation of Zygomycetes on olive mill wastewater (OMW) modeling.•Conversion of OMW into added value lipids containing polyunsaturated fatty acids (GLA).•Lipids of Zygorhynchus moelleri contain 17.7% (w/w) of gamma-linolenic acid.•Zygomycetes remove phenolics up to 77% when cultivated on OMW.

The conversion of olive mill wastewater (OMW) into high added value lipids containing polyunsaturated fatty acids (PUFA), in parallel with a significant phenolic removal by selected strains of Zygomycetes, is reported here for the first time. The growth of Mortierella isabellina, Mortierella ramanniana, Cunninghamella echinulata, Mucor sp., Thamnidium elegans and Zygorhynchus moelleri on solidified media was not significantly affected by the presence of OMW used in the growth medium up to 50% (v/v). Kinetic parameter values and conversion yields, estimated using a mathematical model which was fitted on the experimental data originated from submerged cultures, shows the ability of some Zygomycetes (i.e. T. elegans and Z. moelleri) to grow on OMW and accumulate storage material, i.e. lipids rich in PUFA, and these findings open new perspectives in OMW management and valorization. In liquid media containing OMW as sole carbon source, T. elegans and Z. moelleri produced 4.4 and 3.5 g/L cell mass in surface (SC) and submerged (SMC) cultures, respectively, containing around 60% (w/w) of lipids. Oleic and palmitic acids were the predominant fatty acids. Gamma-linolenic acid was found in high percentages (up to 17.7%, w/w) in the lipid of Z. moelleri, in SMC with OMW as sole carbon source, while PUFA biosynthesis was not favored in SC.

Keywords
Olive mill wastewater; Mortierella isabellina, Mortierella ramanniana, Cunninghamella echinulata, Mucor sp., Thamnidium elegans and Zygorhynchus moelleri; Polyunsaturated fatty acids; Surface and submerged cultures; Modeling
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 170, 20 January 2014, Pages 50–59
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