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Appl Biochem Biotechnol (2015) 175:209222
DOI 10.1007/s12010-014-1258-7
Rafael Barros de Souza & Joo Assis S. de Menezes & Raquel de Ftima Rodrigues de Souza & Emmanuel D. Dutra & Marcos Antonio de Morais Jr
Received: 1 August 2014 /Accepted: 11 September 2014 /
Published online: 24 September 2014# Springer Science+Business Media New York 2014
Abstract In the present work, we evaluated the mineral composition of three sugarcane varieties from different areas in northeast Brazil and their influence on the fermentation performance of Saccharomyces cerevisiae. The mineral composition was homogeneous in the different areas investigated. However, large variation coefficients were observed for concentrations of copper, magnesium, zinc and phosphorus. Regarding the fermentation performances, the sugarcane juices with the highest magnesium concentration showed the highest ethanol yield. Synthetic media supplemented with magnesium also showed the highest yield (0.45 g g1) while the excess of copper led to the lowest yield (0.35 g g1). According to our results, the magnesium is the principal responsible for the increase on the ethanol yield, and it also seems to be able to disguise the inhibitory effects of the toxic minerals present in the sugarcane juice.
Keywords Mineral composition . Magnesium . Copper. Fermentation . Ethanol yield . Sugarcane juice
Introduction
The composition of sugarcane juice may vary, affecting several industrial operational parameters, such as the fermentation yield. Several parameters are implicated in determining the final composition of the sugarcane juice, such as the variety of sugarcane, soil type, fertilization
R. B. de Souza : R. d. F. R. de Souza : M. A. de Morais Jr (*)
Interdepartmental Research Group in Metabolic Engineering, Department of Genetics, Federal University of Pernambuco, Av. Prof. Moraes Rego, 1235, 50670-901 Recife, PE, Brazile-mail: [email protected]
E. D. Dutra
Biomass Energy Research Group, Department of Nuclear Energy, Federal University of Pernambuco, Av. Prof. Moraes Rego, 1235, 50670-901 Recife, PE, Brazil
J. A. S. de Menezes
Fermenta Industrial Biotechnology and Environment ME, Incubatep/ITEP, Av Luiz Freire, 700, room 10, 50740-540 Recife, PE, Brazil
Mineral Composition of the Sugarcane Juice and Its Influence on the Ethanol Fermentation
210 Appl Biochem Biotechnol (2015) 175:209222
strategies, climatic conditions, maturity level of the sugarcane, type of harvest, period of time between burning, cutting and processing, content tips and straw and also by...