Effect of Nickel Contamination on the Growth of Oleaginous Yeasts in Hydrolisates of Arundo Donax
Hydrolysates of Arundo donax, a crop offering high productivity in contaminated orsalinized soils with no inputs of irrigation and agrochemicals, were used in a discontinuous fermenter to grow the oleaginous yeast Lipomyces starkey, to obtain microbial oils potentially useful for the production of 2...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
"Gheorghe Asachi” Technical University of Iasi, Romania
2015
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| Subjects: | |
| Online Access: | http://umpir.ump.edu.my/id/eprint/12639/1/21_1041_Collivignarelli_14.pdf http://umpir.ump.edu.my/id/eprint/12639/7/ftech-2015-abu-Effect%20of%20Nickel%20Contamination%20on%20the%20Growth.pdf http://umpir.ump.edu.my/id/eprint/12639/ http://omicron.ch.tuiasi.ro/EEMJ/pdfs/vol14/no7/Full/21_1041_Collivignarelli_14.pdf |
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| Summary: | Hydrolysates of Arundo donax, a crop offering high productivity in contaminated orsalinized soils with no inputs of irrigation and agrochemicals, were used in a discontinuous fermenter to grow the oleaginous yeast Lipomyces starkey, to obtain microbial oils potentially useful for the production of 2nd-generation biodiesel.
A mixture of fermentable sugars was obtained by steam-explosion and subsequent enzymatic hydrolysis of the lignocellulosic materials. The concentration of Ni2+ ions and of inhibitors of the microbial growth significantly affected both the biomass and the triglyceride yields. The microbial lipids produced were compatible with the synthesis of an automotive-grade biodiesel.
A physico-mathematical model, developed todescribe the biomass growth, demonstratedthat the concentration of heavy metals affected the maximum biomass concentration,though its influence on the specific growthrate of the yeasts was not significant. |
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