Ultrasound Stimulates Ethanol Production during the Simultaneous Saccharification and Fermentation of Mixed Waste Office Paper

1997 ◽  
Vol 13 (3) ◽  
pp. 232-237 ◽  
Author(s):  
B.E. Wood ◽  
H.C. Aldrich ◽  
L.O. Ingram
Keyword(s):  
Ethanol Production ◽  
Simultaneous Saccharification And Fermentation ◽  
Mixed Waste ◽  
Waste Office Paper ◽  
Simultaneous Saccharification ◽  
Office Paper

Optimization of enzymatic hydrolysis for ethanol production by simultaneous saccharification and fermentation of wastepaper

2011 ◽  
Vol 29 (11) ◽  
pp. 1134-1144 ◽  
Author(s):  
Kanokphorn Sangkharak
Keyword(s):  
Enzymatic Hydrolysis ◽  
Ethanol Production ◽  
Incubation Time ◽  
Simultaneous Saccharification And Fermentation ◽  
Trichoderma Viride ◽  
Enzyme Concentration ◽  
Reducing Sugar ◽  
Sugar Production ◽  
Simultaneous Saccharification ◽  
Office Paper

The present study investigated the development of high sugar production by optimization of an enzymatic hydrolysis process using both conventional and statistical methods, as well as the production of ethanol by the selected wastepaper source. Among four sources of pretreated wastepaper including office paper, newspaper, handbills and cardboard, office paper gave the highest values of cellulose (87.12%) and holocelluloses (89.07%). The effects of the amount of wastepaper, the pretreatment method and the type of enzyme on reducing sugar production from office paper were studied using conventional methods. The highest reducing sugar production (1851.28 µg L−1; 37.03% conversion of glucose) was obtained from the optimal condition containing 40 mg of office paper, pretreated with stream explosion and hydrolysed with the combination of cellulase from Aspergillus niger and Trichoderma viride at the fixed loading rate of 20 FPU g−1 sample. The effects of interaction of wastepaper amount and enzyme concentration as well as incubation time were studied by a statistical method using central composite design. The optimal medium composition consisted of 43.97 µg L−1, 28.14 FPU g−1 sample and 53.73 h of wastepaper, enzyme concentration and incubation time, respectively, and gave the highest amount of sugar production (2184.22 µg L−1) and percentage conversion of glucose (43.68%). The ethanol production from pretreated office paper using Saccharomyces cerevisiae in a simultaneous saccharification and fermentation process was 21.02 g L−1 after 36 h of cultivation, corresponding to an ethanol volumetric production rate of 0.58 g ethanol L−1 h−1.

Ethanol Production from Corn Stover Using Soaking Pretreatment

2010 ◽  
Vol 171-172 ◽  
pp. 261-265
Author(s):  
Zhuang Zuo ◽  
Xiu Shan Yang
Keyword(s):  
Ethanol Production ◽  
Corn Stover ◽  
Simultaneous Saccharification And Fermentation ◽  
Pichia Stipitis ◽  
Liquid Ratio ◽  
Mild Conditions ◽  
Whole Process ◽  
Conversion Rates ◽  
Mild Temperature ◽  
Simultaneous Saccharification

Corn stover was pretreated using different soaking conditions at mild temperature. Among the tested conditions, the best was 1% NaOH+8% NH4OH，50°C，48 h, Solid-to-liquid ratio 1:10. The results showed that soaking pretreatment achieved 63.6% delignification, retained the xylan and glucan. After enzymatic hydrolysis, conversion rates of xylan and glucan were 70.9% and 78.5%, respectively. The pretreated filtration re-soaking cause 52.7% xylan and 65.0% glucan conversion. NaOH+NH4OH treatment can be performed under mild conditions, gives a good buffering effect, low carbohydates degradation and extensive removal of lignin. Additionally, simultaneous saccharification and fermentation was conducted with pretreated corn stover to assess the ethanol production. For the whole process, 0.15g ethanol /g corn stover was achieved using Saccharomyces cerevisiae Y5, and 0.19g ethanol /g corn stover when using Pichia stipitis.

Fuel Ethanol Production from Wet Oxidised Corn Stover by S. Cerevisiae

2011 ◽  
Vol 343-344 ◽  
pp. 963-967 ◽  
Author(s):  
Zhang Qiang ◽  
Anne Belinda Thomsen
Keyword(s):  
Ethanol Production ◽  
Corn Stover ◽  
Simultaneous Saccharification And Fermentation ◽  
Ethanol Concentration ◽  
Ethanol Yield ◽  
Liquid Fraction ◽  
Raw Material ◽  
Wet Oxidation ◽  
Inhibition Effect ◽  
Simultaneous Saccharification

In order to find out appropriate process for ethanol production from corn stover, wet oxidation（195°C，15 minutes）and simultaneous saccharification and fermentation (SSF) was carried out to produce ethanol. The results showed that the cellulose recovery of 92.9% and the hemicellulose recovery of 74.6% were obtained after pretreatment. 86.5% of cellulose was remained in the solid cake . After 24h hydrolysis at 50°C using cellulase（Cellubrix L）,the achieved conversion of cellulose to glucose was 64.8%. Ethanol production was evaluated from dried solid cake and the hydrolysate was employed as liquid fraction . After 142 h of SSF with substrate concentration of 8% (W/V), ethanol yield of 73.1 % of the theoretical based on glucose in the raw material was obtained by S. cerevisiae(ordinary baker’ yeast) . The corresponding ethanol concentration and volumetric productivity were 17.2g/L and 0.121g/L.h respectively. The estimated total ethanol production was 257.7 kg/ton raw material by assuming consumption of both C-6 and C-5. No obvious inhibition effect occurred during SSF. These instructions give you the basic guidelines for preparing papers for WCICA/IEEE conference proceedings.

Enhanced ethanol production by simultaneous saccharification and fermentation of pretreated olive stones

2015 ◽  
Vol 74 ◽  
pp. 839-847 ◽  
Author(s):  
Manuel Cuevas ◽  
Sebastián Sánchez ◽  
Juan F. García ◽  
Jaime Baeza ◽  
Carolina Parra ◽  
...  
Keyword(s):  
Ethanol Production ◽  
Simultaneous Saccharification And Fermentation ◽  
Olive Stones ◽  
Simultaneous Saccharification
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