SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

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Bioconversion of hydrolyzed cashew peduncle bagasse for ethanol and xylitol production

AGRIAMBI

Medeiros,Lorena L. de; Silva,Flávio L. H. da; Santos,Sharline F. M.; Madruga,Marta S.; Melo,Débora J. N. de; Conrado,Líbia de S..

ABSTRACT The agro-industrial waste deposited in the environment causes problems in nature that can be solved with the use and generation of bioproducts. Thus, the objective was to study the lignocellulosic fraction of cashew (Anacardium occidentale L.) peduncle bagasse and fermentation on large scale (8-16 times) using the strain Candida guilliermondii CCT-3544 as production agent. According to the obtained results, it can be noted that the dry cashew peduncle bagasse has 21.45% of cellulose, 10.96% of hemicellulose and 35.39% of lignin. During fermentation, C. guilliermondii 3544-CAT was able to grow on medium containing hydrolysate, with maximum cell growth concentration of 3.5 g L-1. The behavior of the sugars in the fermentation process was similar in...

Tipo: Info:eu-repo/semantics/article

Palavras-chave: Anacardium occidentale L.; Candida guilliermondii; Hemicellulose; Bioproduction.

Ano: 2017

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000700488

Biodegradation of acetonitrile by cells of Candida guilliermondii UFMG-Y65 immobilized in alginate, kappa-carrageenan and citric pectin

BJM

Dias,João Carlos T.; Rezende,Rachel P.; Linardi,Valter R..

Different encapsulation matrices were tested for immobilized cells of Candida guilliermondii UFMG-Y65 used for acetonitrile degradation. Acetonitrile degradation by free cells and cells immobilized in Ba-alginate, kappa-carrageenan and citric pectin was studied. The rate of acetonitrile degradation was monitored for 120 h by measuring yeast growth and ammonia concentration. Different alginate concentrations did not affect cell viability, but the period of incubation in BaCl2 solution reduced the number of viable cells. Likewise, the gel nature and the matrix structure of the support resulting from the cell immobilization conditions were of fundamental importance for biocatalyst activity and performance, affecting substantially the patterns of microbial...

Tipo: Info:eu-repo/semantics/article

Palavras-chave: Candida guilliermondii; Acetonitrile; Biodegradation; Immobilization.

Ano: 2000

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000100015

EFFECTS OF IMMOBILIZATION IN Ba-ALGINATE ON NITRILE-DEPENDENT OXYGEN UPTAKE RATES OF CANDIDA GUILLIERMONDII

BJM

Dias,João Carlos Teixeira; Rezende,Rachel Passos; Linardi,Valter Roberto.

Yeast cells immobilized by entrapment in Ba-alginate gel were investigated for growth pattern and respiratory activity. The oxygen uptake rates (OUR) of cells entrapped in gels with 4% alginate were 5.2 and 23% lower than the OUR of 2% alginate and free cells, respectively. The mass-transfer resistance offered by the matrix and growth of the entrapped cells determine a gradient of nutrients throughout the gel which is responsible for both a lower specific growth rate of immobilized cells with respect to that of free ones, and a heterogeneous biomass distribution, with progressively increasing cellular density from the inside to the outside of the matrix. Gel-matrix polymer concentration affected the maximum oxygen uptake of immobilized growing yeast cells.

Tipo: Info:eu-repo/semantics/article

Palavras-chave: Nitriles; Candida guilliermondii; Ba-alginate; Respiration.

Ano: 2001

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822001000300011

Evaluation of nutrient supplementation to charcoal-treated and untreated rice straw hydrolysate for xylitol production by Candida guilliermondii

BABT

Mussatto,Solange Inês; Roberto,Inês Conceição.

Xylitol was produced by Candida guilliermondii from charcoal-treated and untreated rice straw hemicellulosic hydrolysate with or without nutrients (ammonium sulphate, calcium chloride, rice bran extract). Both, xylitol yield and volumetric productivity decreased significantly when the nutrients were added to treated and untreated hydrolysates. In the treated hydrolysate, the efficiency of xylose conversion to xylitol was 79% when the nutrients were omitted. The results demonstrated that rice straw hemicellulosic hydrolysate treated with activated charcoal was a cheap source of xylose and other nutrients for xylitol production by C. guilliermondii. The non-necessity of adding nutrients to the hydrolysate media would be very advantageous since the process...

Tipo: Info:eu-repo/semantics/article

Palavras-chave: Rice straw hydrolysate; Nutrient; Activated charcoal; Candida guilliermondii; Xylitol.

Ano: 2005

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000300020

Evaluation of sorghum straw hemicellulosic hydrolysate for biotechnological production of xylitol by Candida guilliermondii

BJM

Sene,L; Arruda,P.V; Oliveira,S.M.M; Felipe,M.G.A.

A preliminary study on xylitol production by Candida guilliermondii in sorghum straw hemicellulosic hydrolysate was performed. Hydrolysate had high xylose content and inhibitors concentrations did not exceed the commonly found values in other hemicellulosic hydrolysates. The highest xylitol yield (0.44 g/g) and productivity (0.19 g/Lh) were verified after 72 hours.

Tipo: Info:eu-repo/semantics/article

Palavras-chave: Sorghum straw; Hemicellulosic hydrolysate; Xylose; Xylitol; Candida guilliermondii.

Ano: 2011

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000300036

Growth of Candida guilliermondii FTI 20037 on mixed substrate

BABT

Gurgel,Patrick V.; Vieira,Délia C.; Furlan,Sandra A.; Mancilha,Ismael M. de.

Candida guilliermondii FTI 20037 was grown on a mixed substrate comprising glucose and xylose. Inocula were grown using xylose or glucose as carbon source. Results showed that xylose utilization was delayed until glucose was utilized. Inoculum prepared on glucose showed a lag phase in xylose consumption. Cell mass production was higher when glucose was utilized during fermentation.

Tipo: Info:eu-repo/semantics/article

Palavras-chave: Candida guilliermondii; Glucose; Xylose; Mixed substrate.

Ano: 1998

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131998000300010

Improvement of biotechnological xylitol production by glucose during cultive of Candida guilliermondii in sugarcane bagasse hydrolysate

BABT

Silva,Débora Danielle Virgínio da; Mancilha,Ismael Maciel de; Silva,Silvio Silvério da; Felipe,Maria das Graças de Almeida.

The effect of glucose on xylose-to-xylitol bioconversion by Candida guilliermondii was examined by adding it to sugarcane bagasse hydrolysate medium to obtain different glucose:xylose ratios (1:25, 1:12, 1:5 and 1:2.5). Under experimental conditions, increasing glucose:xylose ratio improved the assimilation of the xylose present in the hydrolysate by yeast, resulting in biomass increase, and in the formation of xylitol and glycerol/ethanol by-products. Maximum values of xylitol yield (0.59 g g-1) and volumetric productivity (0.53 g l-1.h-1) were obtained with glucose:xylose ratio of 1:5, resulting in the higher conversion efficiency (64.3%).

Tipo: Info:eu-repo/semantics/article

Palavras-chave: Candida guilliermondii; Glucose; Sugarcane bagasse hydrolysate; Xylitol; Xylose.

Ano: 2007

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000200005

New cultive medium for bioconversion of C5 fraction from sugarcane bagasse using rice bran extract

BJM

Silva,Debora Danielle Virginio da; Cândido,Elisangela de Jesus; Arruda,Priscila Vaz de; Silva,Silvio Silvério da; Felipe,Maria das Graças de Almeida.

The use of hemicellulosic hydrolysates in bioprocesses requires supplementation as to ensure the best fermentative performance of microorganisms. However, in light of conflicting data in the literature, it is necessary to establish an inexpensive and applicable medium for the development of bioprocesses. This paper evaluates the fermentative performance of Scheffersomyces (Pichia) stipitis and Candida guilliermondii growth in sugarcane bagasse hemicellulosic hydrolysate supplemented with different nitrogen sources including rice bran extract, an important by-product of agroindustry and source of vitamins and amino acids. Experiments were carried out with hydrolysate supplemented with rice bran extract and (NH4)2SO4; peptone and yeast extract; (NH4)2SO4,...

Tipo: Info:eu-repo/semantics/article

Palavras-chave: Candida guilliermondii; Hemicellulosic hydrolysate; Scheffersomyces stipitis; Rice bran extract; Sugarcane bagasse.

Ano: 2014

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000400043

Reclassification of Candida guilliermondii FTI 20037 as Candida tropicalis based on molecular phylogenetic analysis

BJM

Lima,Luanne Helena Augusto; Felipe,Maria das Graças de Almeida; Torres,Fernando Araripe Gonçalves.

Yeasts of the genus Candida are of clinical importance and also have many industrial applications, mainly in the food industry. The yeast Candida guilliermondii FTI 20037 has been extensively studied in order to establish a biotechnological process for the production of xylitol. The goal of this study was to verify the taxonomic classification of this strain based on the analysis of rDNA sequences and the xyl1 gene. DNA fragments from these sequences were amplified by PCR and BLAST analysis revealed strong identity with the corresponding sequences from Candida tropicalis. Based on these results, we propose that C. guilliermondii FTI 20037 must be reclassified as C. tropicalis.

Tipo: Info:eu-repo/semantics/article

Palavras-chave: Candida guilliermondii; Candida tropicalis; Ribosomal DNA; Xylitol.

Ano: 2003

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000500033

Xylitol production from wheat straw hemicellulosic hydrolysate: hydrolysate detoxification and carbon source used for inoculum preparation

BJM

Canilha,Larissa; Carvalho,Walter; Felipe,Maria das Graças Almeida; Silva,João Batista de Almeida e.

Wheat straw hemicellulosic hydrolysate was used for xylitol bioproduction. The use of a xylose-containing medium to grow the inoculum did not favor the production of xylitol in the hydrolysate, which was submitted to a previous detoxification treatment with 2.5% activated charcoal for optimized removal of inhibitory compounds.

Tipo: Info:eu-repo/semantics/article

Palavras-chave: Wheat straw hemicellulosic hydrolysate; Hydrolysate detoxification; Inoculum preparation; Candida guilliermondii; Xylitol production.

Ano: 2008

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000200025

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