Ethanol production from macaúba (Acrocomia aculeata) presscake hemicellulosic hydrolysate by Candida boidinii UFMG14.
Yeasts capable of growth on xylose were isolated from macaúba (Acrocomia aculeata) fruit, a Brazilian palm tree with great potential for use as biodiesel feedstock production. Candida boidinii UFMG14 strain achieved the highest ethanol production (5 g/L) and was chosen to ferment macaúba presscake hemicellulosic hydrolysate (MPHH). The MPHH was produced by the first time in this work and the resultant fivefold concentrate showed considerable sugar content (52.3 and 34.2 g/L xylose and glucose, respectively) and low furfural (0.01 g/L) and hydroxymethylfurfural (0.15 g/L) concentrations. C. boidinii UFMG14 fermentation was evaluated in supplemented and non-supplemented MPHH containing either 10 or 25 g/L of xylose. The maximum ethanol production (12 g/L) was observed after 48 h of fermentation. The ethanol yield was significantly affected by supplementation and concentration of MPHH while ethanol productivity was affected only by MPHH concentration. This is the first study demonstrating theC. boidinii potential for ethanol production from hemicellulose byproducts.
Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil; Campus Centro-Oeste Dona Lindu, Universidade Federal de São João del-Rei, 35501-296 Divinópolis, MG, Brazil.
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Gonçalves
Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil.
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Batista
Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil.
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Rodrigues
Campus Centro-Oeste Dona Lindu, Universidade Federal de São João del-Rei, 35501-296 Divinópolis, MG, Brazil.
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Nogueira
Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil. Electronic address: verabio@gmail.com.
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Santos
D056804:Biofuels; D001938:Brazil; D002175:Candida / Q000378:metabolism*; D000431:Ethanol / Q000737:chemistry*; D005285:Fermentation; D005638:Fruit / Q000737:chemistry*; D005947:Glucose; D011134:Polysaccharides / Q000737:chemistry*; D013997:Time Factors; D014197:Trees; D014993:Xylitol / Q000096:biosynthesis; D014994:Xylose / Q000737:chemistry*
D056804:Biofuels; D011134:Polysaccharides; D000431:Ethanol; C007916:hemicellulose; D014994:Xylose; D005947:Glucose; D014993:Xylitol
Candida boidinii; Ethanol fermentation; Hemicellulosic hydrolysate; Macaúba; Presscake