Ethanol Production from Waste Potato Mash By Using Saccharomyces cerevisiae

Izmirlioglu, Gulten; Demırcı, Ali

doi:10.13031/2013.29692

Cited by 15 publications

(18 citation statements)

References 12 publications

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“…The analyzer is consisted of a specific ethanol membrane, system buffer, and standard ethanol solution (2 g/L). The samples that contained ethanol higher than 2 g/L, were diluted with deionized water …”

Section: Ethanolsupporting

confidence: 93%

Ethanol production from rice hull using Pichia stipitis and optimization of acid pretreatment and detoxification processes

Germeç

Kartal

Bilgic

et al. 2016

Biotechnology Progress

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The goal of this study was to produce ethanol from rice hull hydrolysates (RHHs) using Pichia stipitis strains and to optimize dilute acid hydrolysis and detoxification processes by response surface methodology (RSM). The optimized conditions were found as 127.14°C, solid:liquid ratio of 1:10.44 (w/v), acid ratio of 2.52% (w/v), and hydrolysis time of 22.01 min. At these conditions, the fermentable sugar concentration was 21.87 g/L. Additionally, the nondetoxified RHH at optimized conditions contained 865.2 mg/L phenolics, 24.06 g/L fermentable sugar, no hydroxymethylfurfural (HMF), 1.62 g/L acetate, 0.36 g/L lactate, 1.89 g/L glucose, and 13.49 g/L fructose + xylose. Furthermore, RHH was detoxified with various methods and the best procedures were found to be neutralization with CaO or charcoal treatment in terms of the reduction of inhibitory compounds as compared to nondetoxified RHH. After detoxification procedures, the content of hydrolysates consisted of 557.2 and 203.1 mg/L phenolics, 19.7 and 21.60 g/L fermentable sugar, no HMF, 0.98 and 1.39 g/L acetate, 0 and 0.04 g/L lactate, 1.13 and 1.03 g/L glucose, and 8.46 and 12.09 g/L fructose + xylose, respectively. Moreover, the base-line mediums (control), and nondetoxified and detoxified hydrolysates were used to produce ethanol by using P. stipitis strains. The highest yields except that of base-line mediums were achieved using neutralization (35.69 and 38.33% by P. stipitis ATCC 58784 and ATCC 58785, respectively) and charcoal (37.55% by P. stipitis ATCC 58785) detoxification methods. Results showed that the rice hull can be utilized as a good feedstock for ethanol production using P. stipitis. © 2016 American Institute of Chemical Engineers Biotechnol. Prog., 32:872-882, 2016.

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Section: Ethanolsupporting

confidence: 93%

Ethanol production from rice hull using Pichia stipitis and optimization of acid pretreatment and detoxification processes

Germeç

Kartal

Bilgic

et al. 2016

Biotechnology Progress

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“…at different inoculum size, pH-value 5 and initial sugar con (90 g/l) Ethanol yield decrease with increased inoculum size due to increase biomass which required more substrates in media with time sugar concentration decreased. The results in this study similar to other study [19] sugar conversion was continuing simultaneously during the fermentation, and after 52h of fermentation, sugar was completely consumed in both cases as shown in Fig. 8…”

Section: Effect Of Inoculum Size On Bioethanol Productionsupporting

confidence: 90%

Bioethanol (Biofuel) Production from Low Grade Dates

Abbas¹,

Flayeh²

2019

IJCPE

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Bioethanol production from sugar fermentation is one of the most sustainable alternatives to substitute fossil fuel. production of bioethanol from low grade dates which are rich of sugars. An available sugar from a second grade dates (reduction sugar) was 90g/l in this study. Sugar can be served as essential carbon sources for yeast growth in aerobic condition and can also be converted to bioethanol in anaerobic condition. The effect of various parameters on bioethanol production, fermentation time, pH-values, inoculum size and initial sugar concentration were varied in order to determine the optimal of bioethanol production. The highest bioethanol yield was 33g/l which was obtained with sugar concentration 90 g/l, inoculum size 1%, 52h time and pH-value 5.

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“…Neelakandan and Usharan (2009) studied different inoculum size (2, 4, 6, 8 and 10% v/v) for a period of 24 h and observed that the maximum ethanol concentration that is, 8.8% was obtained at 10% inoculum size. In comparison of these results, Izmirlioglu and Demirci (2012) showed that 3% inoculum size was optimum for maximum ethanol concentration and production rate. Turhan et al (2010) reported the ethanol production from carob extract by using S. cerevisiae and found that maximum ethanol concentration; ethanol productivity and ethanol yield were 42.90 g/L, 3.7 g/L/h and 45.0%, respectively, obtained with an initial inoculum of 3%.…”

Section: Optimization Of Inoculum Size For Ethanol Productionmentioning

confidence: 97%

Bioethanol production from starchy part of tuberous plant (potato) using Saccharomyces cerevisiae MTCC-170

Duhan¹,

Kumar²,

Tanwar³

2013

Afr. J. Microbiol. Res.

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Ethanol is one of the bio-energy sources with high efficiency and low environmental impact. Various raw materials have been used as carbon source for ethanol production. In the present study, one varieties of potato that is, Kufri Bahar (KB) flour was chosen as a carbon source. In order to obtain maximum conversion of starch into fermentable sugar, optimum parameters for the liquefaction were determined as 104 to 105°C, 0.15% v/w of α-amylase enzyme solution (300 U/ml) and 30 g dry-weight potato mash/100 ml distilled water, respectively with a 68.86% loss in dry weight during the process. For saccharification process, the optimum dose of amyloglucosidase was 0.35% w/v (300 U/ml) with 16.95% glucose production at pH 5.0 and temperature 60°C after 1 h. The maximum ethanol concentration 7.89% (v/v) was obtained with 10% inoculum size at pH 6.0 after 48 h. Furthermore, out of the three nitrogen (yeast extract, peptone and ammonium sulphate) sources tested for ethanol production, peptone at 1.5 g/l was found to be best (7.58%). In conclusion, this study demonstrates the potential utilization of potato powder for ethanol production.

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Ethanol Production from Waste Potato Mash By Using Saccharomyces cerevisiae

Cited by 15 publications

References 12 publications

Ethanol production from rice hull using Pichia stipitis and optimization of acid pretreatment and detoxification processes

Ethanol production from rice hull using Pichia stipitis and optimization of acid pretreatment and detoxification processes

Bioethanol (Biofuel) Production from Low Grade Dates

Bioethanol production from starchy part of tuberous plant (potato) using Saccharomyces cerevisiae MTCC-170

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