scholarly journals Association of Biometric Attributes and Feed Stock Quality on Ligno Cellulosic Ethanol Yield

2020 ◽  
Vol 107 (Special) ◽  
Keyword(s):  
Cellulosic Ethanol ◽  
Ethanol Yield ◽  
Feed Stock ◽  
Stock Quality

scholarly journals Effect of Brassica napus cultivar on cellulosic ethanol yield

2015 ◽  
Vol 8 (1) ◽  
Author(s):  
Ian P. Wood ◽  
Nikolaus Wellner ◽  
Adam Elliston ◽  
David R. Wilson ◽  
Ian Bancroft ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Cellulosic Ethanol ◽  
Ethanol Yield

scholarly journals N2gas is an effective fertilizer for bioethanol production byZymomonas mobilis

2015 ◽  
Vol 112 (7) ◽  
pp. 2222-2226 ◽  
Author(s):  
Timothy A. Kremer ◽  
Breah LaSarre ◽  
Amanda L. Posto ◽  
James B. McKinlay
Keyword(s):  
Ethanol Production ◽  
Cellulosic Ethanol ◽  
Zymomonas Mobilis ◽  
Ethanol Yield ◽  
Corn Steep Liquor ◽  
Defined Medium ◽  
Steep Liquor ◽  
First Time ◽  
Low Nitrogen ◽  
Cellulosic Feedstock

A nascent cellulosic ethanol industry is struggling to become cost-competitive against corn ethanol and gasoline. Millions of dollars are spent on nitrogen supplements to make up for the low nitrogen content of the cellulosic feedstock. Here we show for the first time to our knowledge that the ethanol-producing bacterium,Zymomonas mobilis, can use N2gas in lieu of traditional nitrogen supplements. Despite being an electron-intensive process, N2fixation byZ. mobilisdid not divert electrons away from ethanol production, as the ethanol yield was greater than 97% of the theoretical maximum. In a defined medium,Z. mobilisproduced ethanol 50% faster per cell and generated half the unwanted biomass when supplied N2instead of ammonium. In a cellulosic feedstock-derived medium,Z. mobilisachieved a similar cell density and a slightly higher ethanol yield when supplied N2instead of the industrial nitrogen supplement, corn steep liquor. We estimate that N2-utilizingZ. mobiliscould save a cellulosic ethanol production facility more than $1 million/y.

scholarly journals Biomass Production a Stronger Driver of Cellulosic Ethanol Yield than Biomass Quality

2017 ◽  
Vol 109 (5) ◽  
pp. 1911-1922 ◽  
Author(s):  
Gregg R. Sanford ◽  
Lawrence G. Oates ◽  
Sarah S. Roley ◽  
David S. Duncan ◽  
Randall D. Jackson ◽  
...  
Keyword(s):  
Biomass Production ◽  
Cellulosic Ethanol ◽  
Ethanol Yield ◽  
Biomass Quality

Co-evolution of β-glucosidase activity and product tolerance for increasing cellulosic ethanol yield

2020 ◽  
Vol 42 (11) ◽  
pp. 2239-2250 ◽  
Author(s):  
Kexin Wang ◽  
Qiuxia Huang ◽  
Hanxin Li ◽  
Xihua Zhao
Keyword(s):  
Cellulosic Ethanol ◽  
Ethanol Yield ◽  
Glucosidase Activity

Efficient ethanol production from beetle-killed lodgepole pine using SPORL technology and Saccharomyces cerevisiae without detoxification

TAPPI Journal ◽  
2011 ◽  
Vol 10 (5) ◽  
pp. 9-18 ◽  
Author(s):  
J.Y. ZHU ◽  
XIAOLIN LUO ◽  
SHEN TIAN ◽  
ROLLAND GLEISNER ◽  
JOSÉ NEGRÓN ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Ethanol Production ◽  
Cellulosic Ethanol ◽  
Mountain Pine Beetle ◽  
Ethanol Yield ◽  
Lodgepole Pine ◽  
Energy Output ◽  
Pine Beetle ◽  
Ethanol Yields ◽  
Live Tree

This study applied Sulfite Pretreatment to Overcome Recalcitrance of Lignocelluloses (SPORL) to evaluate the potential of mountain pine beetle-killed lodgepole pine for ethanol production using conventional Saccharomyces cerevisiae without hydrolysate detoxification. The results indicate that the beetle-killed trees are more susceptible to SPORL pretreatment than live trees in addition to having enriched glucan and mannan content as reported in the literature. Ethanol yields of 200 and 250 L/metric ton wood were achieved from a live tree and a dead tree (four years after infestation) without process optimization. Ethanol yield of 220 L/metric ton of wood was obtained from a downed tree with more advanced decomposition, which is approximately 10% more than that from a corresponding live tree. Process mass and energy balance analyses suggest that net ethanol energy output (before distillation, lignin energy excluded) from the decomposing tree was approximately 3.2 GJ/metric ton wood, which is 23% more than that from a corresponding live tree. The study demonstrated the robustness of the SPORL process and the utility of beetle-killed trees for cellulosic ethanol production even after many years post mortality.

scholarly journals Enhanced co-generation of cellulosic ethanol and methane with the starch/sugar-rich waste mixtures and Tween 80 in fed-batch mode

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Meishan Fan ◽  
Jun Li ◽  
Guican Bi ◽  
Guangying Ye ◽  
Hongdan Zhang ◽  
...  
Keyword(s):  
Cellulosic Ethanol ◽  
Ethanol Concentration ◽  
Ethanol Yield ◽  
Tween 80 ◽  
Fed Batch ◽  
Mixed Fermentation ◽  
Batch Mode ◽  
Mixture Ratio ◽  
Theoretical Yield ◽  
Solids Loading

Abstract Background The mixed-feedstock fermentation is a promising approach to enhancing the co-generation of cellulosic ethanol and methane from sugarcane bagasse (SCB) and molasses. However, the unmatched supply of the SCB and molasses remains a main obstacle built upon binary feedstock. Here, we propose a cellulose–starch–sugar ternary waste combinatory approach to overcome this bottleneck by integrating the starch-rich waste of Dioscorea composita Hemls. extracted residue (DER) in mixed fermentation. Results The substrates of the pretreated SCB, DER and molasses with varying ratios were conducted at a relatively low solids loading of 12%, and the optimal mixture ratio of 1:0.5:0.5 for the pretreated SCB/DER/molasses was determined by evaluating the ethanol concentration and yield. Nevertheless, it was found that the ethanol yield decreased from 79.19 ± 0.20 to 62.31 ± 0.61% when the solids loading increased from 12 to 44% in batch modes, regardless of the fact that the co-fermentation of three-component feedstock was performed under the optimal condition defined above. Hence, different fermentation processes such as fed-batch and fed-batch + Tween 80 were implemented to further improve the ethanol concentration and yield at higher solids loading ranging between 36 and 44%. The highest ethanol concentration of 91.82 ± 0.86 g/L (69.33 ± 0.46% of theoretical yield) was obtained with fed-batch + Tween 80 mode during the simultaneous saccharification and fermentation at a high solids loading of 44%. Moreover, after the ethanol recovery, the remaining stillage was digested for biomethane production and finally yielded 320.72 ± 6.98 mL/g of volatile solids. Conclusions Integrated DER into the combination of SCB and molasses would be beneficial for ethanol production. The co-generation of bioethanol and biomethane by mixed cellulose–starch–sugar waste turns out to be a sustainable solution to improve the overall efficacy in biorefinery.

scholarly journals BIOETHANOL POTENTIAL FROM HIGH DENSITY SHORT ROTATION WOODY CROPS ON MARGINAL LANDS IN CENTRAL CHILE

CERNE ◽  
2017 ◽  
Vol 23 (1) ◽  
pp. 133-145 ◽  
Author(s):  
Eduardo Acuña ◽  
Jorge Cancino ◽  
Rafael Rubilar ◽  
Carolina Parra
Keyword(s):  
Cellulosic Ethanol ◽  
Fossil Fuels ◽  
Ethanol Yield ◽  
Eucalyptus Camaldulensis ◽  
Raw Material ◽  
Planting Density ◽  
Marginal Lands ◽  
Woody Crops ◽  
Short Rotation Woody Crops ◽  
Short Rotation

ABSTRACT Cellulosic ethanol is one of the most important biotechnological products to mitigate the consumption of fossil fuels and to increase the use of renewable resources for fuels and chemicals. Short rotation woody crops (SRWC) have been proposed as the most promising raw material for cellulosic ethanol production, as a result of its several advantages over traditional crops. In order to analyze the potential as crops for lignocellulosic bioethanol production in Chile, SRWC were established with the following species: Acacia melanoxylon, Eucalyptus camaldulensis, Eucalyptus globulus and Eucalyptus nitens. These crops were established in two contrasting environments and in three plantation densities. The average theoretical ethanol yield at 48 months reached 395.9 L.t-1 for A. melanoxylon, 348.7 L.t-1 for E. camaldulensis, and 363.9 L t-1 for E. nitens. It can be concluded that there are significant differences in polysaccharides yield between species and time. On the other hand, significant differences were found between environments. In conclusion, this study has shown that the choice of SRWC species used as a source of polysaccharides must take into account the percentage content in biomass and, crucially, the species, planting density, harvest cycle and site must be carefully selected to ensure a high biomass yield per unit area.

Do Common Stock Quality Ratings Predict Risk?

1979 ◽  
Vol 35 (2) ◽  
pp. 68-71 ◽  
Author(s):  
Robert A. Haugen
Keyword(s):  
Common Stock ◽  
Quality Ratings ◽  
Stock Quality
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