Cellulose ethanol production from waste newsprint by simultaneous saccharification and fermentation using Saccharomyces cerevisiae KNU5377

Park, In Soo; Kim, Il-Sup; Kang, Kyunghee; Sohn, Ho-Yong; Rhee, In‐Koo; Jin, Ingnyol; Jang, Han‐Su

doi:10.1016/j.procbio.2009.11.006

Cited by 67 publications

(34 citation statements)

References 19 publications

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“…On the other hand, the relative saccharification ratio at 35°C, the maximum temperature with good fermentability, was only 66.2% of the optimum value. These results show that the appropriate temperature for enzymatic saccharification is generally higher than that of fermentation; this has also been shown in other studies as the principal drawbacks of the SSF process [7,12,14]. However, saccharification using the temperature-shift process (Fig.…”

Section: Pretreatment and Enzymatic Hydrolysis Of Barley Strawsupporting

confidence: 85%

“…Although SSF has many advantages, a significant discrepancy still exists between the optimal temperature for saccharification and fermentation [7,14]. Since ethanol fermentable yeasts such as Saccharomyces cerevisiae have an optimal temperature of 30-35°C for fermentation and that of the cellulosic enzymes is 45-50°C for biomass hydrolysis, a compromise between the appropriate temperatures for saccharification and fermentation is needed in the SSF process.…”

Section: Introductionmentioning

confidence: 99%

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Cellulosic ethanol production on temperature-shift simultaneous saccharification and fermentation using the thermostable yeast Kluyveromyces marxianus CHY1612

Kang¹,

Kim²,

Kim

et al. 2011

Bioprocess Biosyst Eng

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In cellulosic ethanol production, use of simultaneous saccharification and fermentation (SSF) has been suggested as the favorable strategy to reduce process costs. Although SSF has many advantages, a significant discrepancy still exists between the appropriate temperature for saccharification (45-50 °C) and fermentation (30-35 °C). In the present study, the potential of temperature-shift as a tool for SSF optimization for bioethanol production from cellulosic biomass was examined. Cellulosic ethanol production of the temperature-shift SSF (TS-SSF) from 16 w/v% biomass increased from 22.2 g/L to 34.3 g/L following a temperature shift from 45 to 35 °C compared with the constant temperature of 45 °C. The glucose conversion yield and ethanol production yield in the TS-SSF were 89.3% and 90.6%, respectively. At higher biomass loading (18 w/v%), ethanol production increased to 40.2 g/L with temperature-shift time within 24 h. These results demonstrated that the temperature-shift process enhances the saccharification ratio and the ethanol production yield in SSF, and the temperature-shift time for TS-SSF process can be changed according to the fermentation condition within 24 h.

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Section: Pretreatment and Enzymatic Hydrolysis Of Barley Strawsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Cellulosic ethanol production on temperature-shift simultaneous saccharification and fermentation using the thermostable yeast Kluyveromyces marxianus CHY1612

Kang¹,

Kim²,

Kim

et al. 2011

Bioprocess Biosyst Eng

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show abstract

“…On the other hand, it can be observed that the cellulolytic complex from P. sanguineus could also be employed in a simultaneous saccharification and fermentation (SSF) system since the residual activities at 40°C for endoglucanase, FPase, and β-glucosidase were 62.0%, 64.0%, and 47.2%, respectively. SSF can be carried out within a temperature range of 32-45°C, depending on the thermotolerance of the microorganism involved in the fermentation [32][33][34], and this process is advantageous mainly because end product inhibition is minimized during the process and a lower enzyme loading is required [34,35].…”

Section: Analysis Of the Multienzymatic Complex By Gel Filtrationmentioning

confidence: 99%

Characterization of Cellulolytic Extract from Pycnoporus sanguineus PF-2 and Its Application in Biomass Saccharification

Falkoski

Guimarães

Almeida

et al. 2012

Appl Biochem Biotechnol

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The aim of this work was to evaluate the biochemical features of the white-rot fungi Pycnoporus sanguineus cellulolytic complex and its utilization to sugarcane bagasse hydrolysis. When cultivated under submerged fermentation using corn cobs as carbon source, P. sanguineus produced high FPase, endoglucanase, β-glucosidase, xylanase, mannanase, α-galactosidase, α-arabinofuranosidase, and polygalacturonase activities. Cellulase activities were characterized in relation to pH and temperature. β-Glucosidase and FPase activities were higher at 55 °C, pH 4.5, and endoglucanase activity was higher at 60 °C, in a pH range of 3.5-4.0. All cellulase activities were highly stable at 40 and 50 °C through 48 h of pre-incubation. Crude enzymatic extract from P. sanguineus was applied in a saccharification experiment using acid-treated and alkali-treated sugarcane bagasse as substrate, and the hydrolysis yields were compared to that obtained by a commercial cellulase preparation. Reducing sugar yields of 60.4% and 64.0% were reached when alkali-treated bagasse was hydrolyzed by P. sanguineus extract and commercial cellulase, respectively. Considering the glucose production, it was observed that P. sanguineus extract and commercial cellulase ensured yields of 22.6% and 36.5%, respectively. The saccharification of acid-treated bagasse was lower than that of alkali-treated bagasse regardless of the cellulolytic extract. The present work showed that P. sanguineus has a great potential as an enzyme producer for biomass saccharification.

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“…Korea already initiated a bioethanol production project, utilizing municipal waste and sludge from a local industrial complex (Park et al, 2010). Meanwhile, Sweden started bioethanol generation processed by fermentation from starch plants obtained from slurries and streams (Linde et al, 2008).…”

Section: Municipal Plant-based Waste Biomassmentioning

confidence: 99%

“…To the best of our knowledge, yet recombinant yeast has not been established in industrial usage for bioethanol production because of its very high instrumental cost. Current researches are ongoing on optimization of bioethanol production, using recombinant yeast (Park et al, 2010). According to Table 2, among different types of yeast and yeast strains, S. cerevisiae (recombinant) is the most prudent vehicle for fermentation as it results in more than twice the bioethanolic yield, compared to other yeasts and strains.…”

Section: Yeasts Involved In the Fermentation Processmentioning

confidence: 99%

A Review of Bioethanol Production from Plant-based Waste Biomass by Yeast Fermentation

Hossain

Zaini

Mahlia³

2017

IJTech

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Commercialization of bioethanol has recently intensified due to its market stability, low cost, sustainability, alternative fuel energy composition, greener output and colossal fossil fuel depletion. Recently, because of greenhouse intensity worldwide, many researches are ongoing to reprocess the waste as well as turning down the environmental pollution. With this scenario, the invention of bioethanol was hailed as a great accomplishment to transform waste biomass to fuel energy and in turn reduce the massive usages of fossil fuels. In this study, our review enlightens various sources of plant-based waste feed stocks as the raw materials for bioethanol production because they do not adversely impact the human food chain. However, the cheapest and conventional fermentation method, yeast fermentation is also emphasized here notably for waste biomass-to-bioethanol conversion. Since the key fermenting agent, yeast is readily available in local and international markets, it is more cost-effective in comparison with other fermentation agents. Furthermore, yeast has genuine natural fermentation capability biologically and it produces zero chemical waste. This review also concerns a detailed overview of the biological conversion processes of lignocellulosic waste biomass-to-bioethanol, the diverse performance of different types of yeasts and yeast strains, plusbioreactor design, growth kinetics of yeast fermentation, environmental issues, integrated usages on modern engines and motor vehicles, as well as future process development planning with some novel co-products.

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Cellulose ethanol production from waste newsprint by simultaneous saccharification and fermentation using Saccharomyces cerevisiae KNU5377

Cited by 67 publications

References 19 publications

Cellulosic ethanol production on temperature-shift simultaneous saccharification and fermentation using the thermostable yeast Kluyveromyces marxianus CHY1612

Cellulosic ethanol production on temperature-shift simultaneous saccharification and fermentation using the thermostable yeast Kluyveromyces marxianus CHY1612

Characterization of Cellulolytic Extract from Pycnoporus sanguineus PF-2 and Its Application in Biomass Saccharification

A Review of Bioethanol Production from Plant-based Waste Biomass by Yeast Fermentation

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