Relative fermentability of lignocellulosic diluteacid prehydrolysates

Fenske, John J.; Hashimoto, Andrew G.; Penner, Michael H.

doi:10.1007/bf02785651

Cited by 19 publications

(8 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was also noted that temperature was a more significant parameter than acid concentration. Fenske et al (1998) reported a 96% xylose recovery in a similar study. Chung et al (2005) reported optimal conditions of 1.2% (w/w) at 180 °C for sulfuric acid pretreatment of switchgrass and determined that 90% of cellulose in the pretreated biomass was converted into reducing sugars during a 72 h enzymatic hydrolysis.…”

Section: Chemical Pretreatmentmentioning

confidence: 67%

“…Their results indicate that xylose fermentation was slower and less complete than glucose fermentation and greatly reduced at higher sugar concentrations. Fenske et al (1998) used P. stipitis to ferment pentoses in the pretreatment liquor obtained from xylose-optimized dilute acid pretreatment of switchgrass and reported an 83% ethanol yield.…”

Section: Fermentationmentioning

confidence: 99%

See 1 more Smart Citation

Switchgrass for bioethanol and other value-added applications: A review

Keshwani

2009

Bioresource Technology

369

195

View full text Add to dashboard Cite

Section: Chemical Pretreatmentmentioning

confidence: 67%

Section: Fermentationmentioning

confidence: 99%

Switchgrass for bioethanol and other value-added applications: A review

Keshwani

2009

Bioresource Technology

369

195

View full text Add to dashboard Cite

“…Dilute sulphuric acid pretreatment at high temperatures extensively hydrolyzes the hemicellulose to soluble sugars (Schell et al 2003;Fenske et al 1998). 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).…”

Section: Introductionmentioning

confidence: 99%

Effect of pretreatment chemicals on xylose fermentation by Pichia stipitis

Agbogbo

Wenger

2006

Biotechnol Lett

View full text Add to dashboard Cite

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.

show abstract

“…41, 73.82, 41.99, 31.83, 23.35, and 0.58% of dry wood, respectively. When compared to other reported lignocellulosic residues such as wheat straw (Chen et al 2008), oil palm empty fruit bunches (Jeon et al 2014), corn stover (Fenske et al 1998), switchgrass (Zhang et al 2013), and A. dealbata wood (Ferreira et al 2011), A. mangium, and Acacia hybrid possessed a relatively higher cellulose content (42% to 44% versus 32, 35, 7.1, 34, and 43%, respectively). This result shows clearly that both raw materials contained a high enough cellulose content to be used for ethanol production.…”

Section: Chemical Composition Of Acacia Spmentioning

confidence: 78%

Statistical Approach for Optimization of Ethanol Production from Fast-growing Trees: Acacia mangium and Acacia hybrid

et al. 2015

View full text Add to dashboard Cite

This is the first report of the potential of Acacia fast growing trees in Thailand, A. mangium and the Acacia hybrid (A. mangium x A. auriculiformis), as raw material for ethanol production through a simultaneous saccharification and fermentation process by Saccharomyces cerevisiae TISTR 5339. Alkaline pulping was applied as the pretreatment process. Optimization of ethanol production was studied using response surface methodology based on central composite design. The optimized conditions of 100 g/L solid loading and an A600 of S. cerevisiae TISTR 5339 of 2 gave observed values of ethanol production of 35.7 and 27.3 g/L, which corresponded with the predicted values of 32.32 and 26.37g/L from A. mangium and A. hybrid, respectively. This condition was then used for up-scaling in a 10-L stirred bioreactor. The improved maximum ethanol concentrations of 37.84 and 36.52 g/L were obtained from A. mangium and Acacia hybrid, respectively, within 96 h of cultivation at 30 °C and no aeration rate. Keywords INTRODUCTIONWith the depletion of the world's petroleum, alternative non-petroleum-based sources of energy are being looked at with greater interest. Many countries have begun focusing on renewable resources for production of ethanol-based fuels. Lignocellulosic biomass from woody plants has the potential to become a major source of fermentable sugars for the production of ethanol because trees are the most abundant source of biomass. Thus, lignocellulosic biomass has been considered a new resource for ethanol production.Because of its chemical composition, lignocellulosic biomass is very different from types of biomass that have large content of sugars or starch, as is customarily used in the biofuel industry. The structure of these former materials, mainly composed by cellulose, hemicellulose, and lignin, requires the process for biofuels production to be adjusted for each type of biomass, according to their component characteristics. Thus, pretreatment has been recognized as a necessary upstream process to improve the formation of sugars for downstream microbial and enzymatic processing.Different kind of pretreatment methods, under a large variety of conditions, have been studied to improve the fermentability and digestibility. Mechanical size reduction is a physical pretreatment to increase enzyme-accessible surface areas (Zhu et al. 2009). In addition to these other pretreatment options, steam explosion is a technique based on PEER-REVIEWED ARTICLE bioresources.com Boondaeng et al. (2015). "Ethanol from Acacia," BioResources 10(2), 3154-3168. 3155 subjecting the biomass to pressurized steam for a short duration of time and then suddenly depressurizing the system. Due to the explosive decomposition, the fibers are separated and changes to the microstructure are brought about by the suddenly reduced pressure (Brodeur et al. 2011). The treatments result in increasing cellulose digestibility of pretreated biomass and solubilizing a significant portion of the hemicellulosic component (Nibedita et al. 2012). To help wi...

show abstract

Relative fermentability of lignocellulosic diluteacid prehydrolysates

Cited by 19 publications

References 20 publications

Switchgrass for bioethanol and other value-added applications: A review

Switchgrass for bioethanol and other value-added applications: A review

Effect of pretreatment chemicals on xylose fermentation by Pichia stipitis

Statistical Approach for Optimization of Ethanol Production from Fast-growing Trees: Acacia mangium and Acacia hybrid

Contact Info

Product

Resources

About