Enhanced ethanol production via fermentation of rice straw with hydrolysate-adapted Candida tropicalis ATCC 13803

Oberoi, Harinder Singh; Vadlani, Praveen V.; Brijwani, Khushal; Bhargav, Vinod Kumar; Patil, R. T.

doi:10.1016/j.procbio.2010.04.017

Cited by 102 publications

(58 citation statements)

References 38 publications

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“…Yeasts of the genus Candida sp. have shown the ability to ferment pentoses and hexoses carbohydrates from degradation of hemicellulose and cellulose, individually and in co-culture [5][6][7]. The co-culture system appears to be an advantageous system over individual cultures because of the potential for synergistic utilization of the metabolic pathways of the strains involved [8,9].…”

Section: Introductionmentioning

confidence: 99%

Capability of Candidas to Ferment Mixtures of Carbohydrates to Alcohol in Free Cells and Co-Culture

Estrada-Martínez¹,

Pacheco-López²,

Ramírez‐Sucre³

et al. 2017

JFSE

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Abstract:Organic biomass is an attractive feedstock for second generation alcohol production. Wild-type strains of the genus Candida showed capabilities different to produce alcohol fermenting a carbohydrates mixture (synthetic medium), individually and in co-culture. Therefore, the main objective of this work was to evaluate the capability of Candida wild-type strains isolated from termite gut and rumen liquid, to ferment the most commonly carbohydrates presented in citrus residues, individually and in co-culture to alcohol production. C. Tropicalis (LR4) presented higher percentage of carbohydrate consumption (74.20% ± 4.60%), alcohol production (44.53 ± 0.01 gL -1 ) and maximal alcohol productivity (6.40 ± 0.01 gL -1 day) than C. Glabrata (T1). Co-culture schemas, CC1 (LR4: 60%; T1: 40%) and CC3 (first LR4 alone and 2 days later T1) presented the highest alcohol production (45.20 ± 1.30 gL -1 and 46.80 ± 2.60 gL -1 , respectively). Maximal alcohol productivity was obtained with CC2 (LR4: 80%; T1: 20%) and CC3 schemas, 7.70 ± 0.29 gL -1 day and 7.80 ± 0.44 gL -1 day, respectively. The results suggest the usefulness of these wild-type strains in co-culture as an alternative to alcohol production from carbohydrates mixtures at concentrations commonly found in citrus waste.

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Section: Introductionmentioning

confidence: 99%

Capability of Candidas to Ferment Mixtures of Carbohydrates to Alcohol in Free Cells and Co-Culture

Estrada-Martínez¹,

Pacheco-López²,

Ramírez‐Sucre³

et al. 2017

JFSE

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“…Sequential transferring of the inoculum (2 ml) was done as described previously for increasing concentrations of the optimized hydrolysate of OPEFB (20, 50, 70, and 100%), so that strains could adapt to the physiological conditions of the medium. Cell culture growth at potato/dextrose/agar (PDA) was monitored at each step during successive inoculation of strains until a significant increase in cell concentration was observed (Aguilera and Benitez, 1989;Oberoi et al, 2010).…”

Section: Xylitol Productionmentioning

confidence: 99%

Xylose recovery from dilute-acid hydrolysis of oil palm (Elaeis guineensis) empty fruit bunches for xylitol production

Manjarrés-Pinzón¹,

Arias-Zabala²,

Londoño³

et al. 2017

Afr. J. Biotechnol.

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The aim of this study was to evaluate the effect of different process conditions, such as the sulfuric acid concentration, contact time, solid:liquid ratio and particle size, on the xylose recovery and the formation of by-products from oil palm empty fruit bunch (OPEFB) with dilute-acid hydrolysis. Moreover, an adapted and non-adapted strain of the yeast Candida guilliermondii was used to obtain xylitol from the optimal hydrolysate. Xylose, glucose, hydroxymethylfurfural (HMF) and acetic acid in the acid hydrolysate were analyzed with high performance liquid chromatography (HPLC). A BoxBehnken-based design was used to find the combination of factors that maximized the formation of xylose in the hydrolysate optimization process. The fermentation to obtain xylitol from the optimized hydrolysate of OPEFB with adapted and non-adapted C. guilliermondii strains was made in 100 ml Erlenmeyer flasks at 30°C for 96 h at 200 rpm in an incubator shaker. The maximum xylose concentration (32.59 g L -1) was obtained at 121°C, for 30 min, with a 1:8 solid:liquid ratio, 2% acid concentration and particle size of around 4 cm. With the same conditions, the inhibitor concentrations, such as HMF, glucose and acetic acid, were 0.023, 1.033 and 11.078 g L -1, respectively. The optimized conditions were the same as previously described. The higher xylitol productivity (10.3 g L -1) and yield (0.43 g g -1) were obtained by fermentation with non-adapted C. guilliermondii strains from the optimized hydrolysate of OPEFB without the need for detoxification. It is not necessary to make an adaptation of C. guilliermondii in the optimized hydrolysate of OPEFB to produce xylitol.

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“…tropicalis have been demonstrated to produce ethanol from a mixed-sugar stream (Oberoi et al, 2010) and acid hydrolysate olive pruning (Mateo et al, 2015). It is able to degrade acetate, furfural, and 5-hydromethylfurfural and metabolite xylose to ethanol under anaerobic simultaneous saccharification and fermentation (Cheng et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Improving ethanol production by co-culturing of Saccharomyces cerevisiae with Candida tropicalis from rice husk hydrolysate media

Sopandi¹,

Wardah²

2017

Afr. J. Microbiol. Res.

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The use of agricultural by-product as feed stock and co-culture fermentation is a good strategy for improving the efficiency of fermentation and ethanol production. Most rice husks have low protein and nitrogen content and need to be supplemented with nitrogen for fermentation process. This research sought to determine the optimal supplementation of rice husk stream-based fermentation medium with nitrogen and molasses sources, initial pH and incubation time for maximizing ethanol production by coculturing Saccharomyces cerevisiae with Candida tropicalis. Urea, sodium nitrate and ammonium nitrate were used as nitrogen sources and molasses was used as carbon sources. Co-cultures of S.

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Enhanced ethanol production via fermentation of rice straw with hydrolysate-adapted Candida tropicalis ATCC 13803

Cited by 102 publications

References 38 publications

Capability of Candidas to Ferment Mixtures of Carbohydrates to Alcohol in Free Cells and Co-Culture

Capability of Candidas to Ferment Mixtures of Carbohydrates to Alcohol in Free Cells and Co-Culture

Xylose recovery from dilute-acid hydrolysis of oil palm (Elaeis guineensis) empty fruit bunches for xylitol production

Improving ethanol production by co-culturing of Saccharomyces cerevisiae with Candida tropicalis from rice husk hydrolysate media

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