Effect of Nickel Contamination on the Growth of Oleaginous Yeasts in Hydrolisates of Arundo Donax

Pirozzi, Domenico and Toscano, Giuseppe and Caputo, Gerardo and Florio, Ciro and Rugari, Felicia and Travaglini, Giuseppe and Yousuf, Abu and Zuccaro, Gaetano (2015) Effect of Nickel Contamination on the Growth of Oleaginous Yeasts in Hydrolisates of Arundo Donax. Environmental Engineering and Management Journal, 14 (7). pp. 1683-1690. ISSN 1843-3707. (Published)

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Abstract

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.

Item Type:	Article
Uncontrolled Keywords:	Arundo donax, heavy metals, microbial oils, oleaginous yeasts
Subjects:	T Technology > TD Environmental technology. Sanitary engineering
Faculty/Division:	Faculty of Engineering Technology
Depositing User:	Dr. Abu Yousuf
Date Deposited:	05 Apr 2016 07:51
Last Modified:	24 Jan 2018 05:54
URI:	http://umpir.ump.edu.my/id/eprint/12639
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