Ethanol fermentation of red oak acid prehydrolysate by the yeast Pichia stipitis CBS 5776

Tran, Ai Van; Chambers, Robert P.

doi:10.1016/0141-0229(86)90154-7

Cited by 127 publications

(26 citation statements)

References 9 publications

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“…Although the inhibitors generated after dilute acid pretreatment can decrease ethanol production (Delgenes et al 1996;Tran and Chambers 1986), Persson et al (2002) have shown that the improved fermentability after alkali treatment are difficult to explain by the removal of inhibitors only. Therefore, the salts produced after neutralizing the excess H 2 SO 4 with alkalis could play a role in the fermentation.…”

Section: Introductionmentioning

confidence: 98%

“…The residual acid after pretreatment is neutralized with alkalis such as Ca(OH) 2 (van Zyl et al 1988;EkenSaracoglu and Arslan 2000), NH 4 OH (Alriksson et al 2005;Persson et al 2002) and NaOH (Nilvebrant et al 2005). In some cases, these alkalis are added in excess to reduce inhibitor concentrations in dilute acid pretreated biomass (Tran and Chambers 1986;Nigam 2001a, b).…”

Section: Introductionmentioning

confidence: 98%

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Effect of pretreatment chemicals on xylose fermentation by Pichia stipitis

Agbogbo

Wenger

2006

Biotechnol Lett

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Pretreatment of biomass with dilute H2SO4 results in residual acid which is neutralized with alkalis such as Ca(OH)2, NaOH and NH4OH. The salt produced after neutralization has an effect on the fermentation of Pichia stipitis. Synthetic media of xylose (60 g total sugar/l) was fermented to ethanol in the presence and absence of the salts using P. stipitis CBS 6054. CaSO4 enhanced growth and xylitol production, but produced the lowest ethanol concentration and yield after 140 h. Na2SO4 inhibited xylitol production, slightly enhanced growth towards the end of fermentation but had no significant effect on xylose consumption and ethanol concentration. (NH4)2SO4 inhibited growth, had no effect on xylitol production, and enhanced xylose consumption and ethanol production.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

Effect of pretreatment chemicals on xylose fermentation by Pichia stipitis

Agbogbo

Wenger

2006

Biotechnol Lett

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“…As it can be seen from Fig. 1, the charcoal-treated hydrolysates show a substantial reduction in the peak corresponding to LDP, similarly to the effect caused by molecular sieves in red oak hydrolysates [11].…”

Section: Resultsmentioning

confidence: 58%

“…The UV spectra of hydrolysates shows an absorption maximum at 279 nm that is indicative of the presence of soluble lignin [10][11][12]. After charcoal adsorption, the reduction in the relative size of absorbance maxima at 279 and 207 nm proves a selective LDP removal.…”

Section: Resultsmentioning

confidence: 99%

Study of charcoal adsorption for improving the production of Xylitol from wood hydrolysates

Parajó

Domı́nguez

Domínguez

1996

Bioprocess Engineering

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Xylose-containing solutions, obtained from acid prehydrolysis of Eucalyptus wood, were treated with powdered charcoal in order to remove lignin-derived compounds that limit the potential of hydrolysates for making fermentation media. Both the kinetics and equilibrium of adsorption were modelled using equations reported in literature. Charcoalpretreated hydrolysates were supplemented with nutrients and used for producing xylitol with the yeast Debaryomyces hansenii NRRL Y-7426. The susceptibility to fermentation of culture media made with this procedure was compared with those corresponding to media made from untreated wood hydrolysates or standard xylose solutions. The removal of lignin-derived compounds from hydrolysates was closely related with the efficiency of fermentation.

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“…Various crop residues such as wood and forest product residues, grasses, agricultural crops, and their residues can be used as feedstocks for ethanol production (Tran and Chambers, 1986;Delgenes et al, 1990;Roberto et al, 1991;Ferrari et al, 1992;Hahn-Hägerdal et al, 1994;Saraçoglu-Eken and Arslan, 2000;Nigam, 2001Nigam, , 2002Sharma et al, 2002Sharma et al, , 2004. Novel fermentation feedstocks from nontraditional crops and agricultural wastes might become attractive alternatives.…”

Section: Introductionmentioning

confidence: 99%

APPLICATION OF EXPERIMENTAL DESIGN METHOD FOR ETHANOL PRODUCTION BY FERMENTATION OF SUNFLOWER SEED HULL HYDROLYSATE USINGPICHIA STIPITISNRRL-124

Jargalsaikhan

Saraçoğlu

2008

Chemical Engineering Communications

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The lignocellulosic hydrolysates provide a rich medium for fermentation of sugars into ethanol. The potential use of sunflower seed hull hemicellulose hydrolysate in ethanol fermentation was evaluated by using the Experimental Design method in this study. A 2 2 Box-Wilson experimental design was used to develop a statistical model. The effects of shaking rate (55-145 rpm) and initial pH (4.6-7.4) on the fermentation of hydrolysate with Pichia stipitis yeast were studied in shaking bath experiments at 30C. Model equations that represent maximum ethanol concentration E max and ethanol yield Y P=S in terms of shaking rate and pH were developed by using the Design-Expert package program. From response surfaces, optimum variables were calculated numerically by the Design-Expert computer program. Such a procedure provided the optimum values of the parameters with respect to both Y P=S and E max as X 1 ¼ 5.89 pH and X 2 ¼ 114.6 rpm. The maximum ethanol concentration of 11.04 g=L and ethanol yield of 0.32 were obtained with these optimized parameters.

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Ethanol fermentation of red oak acid prehydrolysate by the yeast Pichia stipitis CBS 5776

Cited by 127 publications

References 9 publications

Effect of pretreatment chemicals on xylose fermentation by Pichia stipitis

Effect of pretreatment chemicals on xylose fermentation by Pichia stipitis

Study of charcoal adsorption for improving the production of Xylitol from wood hydrolysates

APPLICATION OF EXPERIMENTAL DESIGN METHOD FOR ETHANOL PRODUCTION BY FERMENTATION OF SUNFLOWER SEED HULL HYDROLYSATE USINGPICHIA STIPITISNRRL-124

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