Evaluation of D-xylose fermenting yeasts for utilization of a wood-derived hemicellulose hydrolysate

1984 ◽  
Vol 30 (5) ◽  
pp. 682-690 ◽  
Author(s):  
Jared E. Fein ◽  
S. Radig Tallim ◽  
G. Ross Lawford
Keyword(s):  
Ethanol Production ◽  
Batch Culture ◽  
Candida Tropicalis ◽  
Chemical Pretreatment ◽  
Hemicellulose Hydrolysate ◽  
Acid Hydrolysate

Seven of 37 strains of yeast, recently identified for their ability to ferment D-xylose to ethanol, produced this alcohol from crude hardwood hemicellulose hydrolysate in batch culture, with variable amounts of xylitol as a by-product. Of these, Candida tropicalis showed the greatest potential for ethanol production. The crude acid hydrolysate was found to be inhibitory to all of the yeasts, even at dilute hydrolysate concentrations. Significant improvements in the utilization of the substrate were achieved through both strain acclimatization and chemical pretreatment of the hydrolysate.

scholarly journals Microwave Assisted Chemical Pretreatment Method for Bio-ethanol Production from Rice Straw

2017 ◽  
Vol 29 (5) ◽  
pp. 943-950 ◽  
Author(s):  
Renu Singh ◽  
Monika Srivastava ◽  
Bharti Rohatgi ◽  
Abhijit Kar ◽  
Ashish Shukla
Keyword(s):  
Ethanol Production ◽  
Rice Straw ◽  
Chemical Pretreatment ◽  
Pretreatment Method ◽  
Microwave Assisted

Ethanol production from concentrated whey permeate using a fed-batch culture ofKluyveromyces fragilis

1994 ◽  
Vol 16 (2) ◽  
pp. 205-210 ◽  
Author(s):  
Mario Daniel Ferrari ◽  
Lili�n Loperena ◽  
Hermosinda Varela
Keyword(s):  
Ethanol Production ◽  
Batch Culture ◽  
Fed Batch ◽  
Whey Permeate ◽  
Fed Batch Culture

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

2010 ◽  
Vol 45 (8) ◽  
pp. 1299-1306 ◽  
Author(s):  
Harinder Singh Oberoi ◽  
Praveen V. Vadlani ◽  
Khushal Brijwani ◽  
Vinod Kumar Bhargav ◽  
Ramabhau Tumadu Patil
Keyword(s):  
Ethanol Production ◽  
Rice Straw ◽  
Candida Tropicalis

scholarly journals Ethanol Production from Nondetoxified Dilute-Acid Lignocellulosic Hydrolysate by Cocultures of Saccharomyces cerevisiae Y5 and Pichia stipitis CBS6054

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Ping Wan ◽  
Dongmei Zhai ◽  
Zhen Wang ◽  
Xiushan Yang ◽  
Shen Tian
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Ethanol Production ◽  
Ethanol Concentration ◽  
Ethanol Yield ◽  
Synthetic Medium ◽  
Pichia Stipitis ◽  
Dilute Acid ◽  
Acid Hydrolysate ◽  
Issatchenkia Orientalis ◽  
Final Ethanol Concentration

Saccharomyces cerevisiae Y5 (CGMCC no. 2660) and Issatchenkia orientalis Y4 (CGMCC no. 2159) were combined individually with Pichia stipitis CBS6054 to establish the cocultures of Y5 + CBS6054 and Y4 + CBS6054. The coculture Y5 + CBS6054 effectively metabolized furfural and HMF and converted xylose and glucose mixture to ethanol with ethanol concentration of 16.6 g/L and ethanol yield of 0.46 g ethanol/g sugar, corresponding to 91.2% of the maximal theoretical value in synthetic medium. Accordingly, the nondetoxified dilute-acid hydrolysate was used to produce ethanol by co-culture Y5 + CBS6054. The co-culture consumed glucose along with furfural and HMF completely in 12 h, and all xylose within 96 h, resulting in a final ethanol concentration of 27.4 g/L and ethanol yield of 0.43 g ethanol/g sugar, corresponding to 85.1% of the maximal theoretical value. The results indicated that the co-culture of Y5 + CBS6054 was a satisfying combination for ethanol production from non-detoxified dilute-acid lignocellulosic hydrolysates. This co-culture showed a promising prospect for industrial application.

Two-reactor, continuous culture fermentation for fuel ethanol production from lignocellulosic acid hydrolysate using Zymomonas mobilis and Scheffersomyces stipitis

RSC Advances ◽  
2014 ◽  
Vol 4 (69) ◽  
pp. 36412-36418 ◽  
Author(s):  
Gaurav Chaudhary ◽  
Sanjoy Ghosh
Keyword(s):  
Ethanol Production ◽  
Continuous Culture ◽  
Zymomonas Mobilis ◽  
Fuel Ethanol ◽  
Ethanol Productivity ◽  
Scheffersomyces Stipitis ◽  
Acid Hydrolysate

Multistage ethanol production from lignocellulosic acid hydrolysate using two different microorganisms in two reactors enhances the utilization of all sugars (pentose and hexose), with higher ethanol productivity.

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