scholarly journals Effects of harvest frequency and biosolids application on switchgrass yield, feedstock quality, and theoretical ethanol yield

GCB Bioenergy ◽  
2013 ◽  
Vol 7 (1) ◽  
pp. 112-121 ◽  
Author(s):  
Xiao-Jun Allen Liu ◽  
John H. Fike ◽  
John M. Galbraith ◽  
Wonae B. Fike ◽  
David J. Parrish ◽  
...  
Keyword(s):  
Ethanol Yield ◽  
Feedstock Quality ◽  
Harvest Frequency ◽  
Theoretical Ethanol Yield ◽  
Biosolids Application

scholarly journals Bio-Fuel Potential of Some Sweet Sorghum Genotypes [Sorghum bicolor (L.) Moench ssp. saccharatum]

2020 ◽  
pp. 15-22
Author(s):  
Ayse Gulgun Oktem ◽  
Abdullah Oktem ◽  
Timucin Tas ◽  
Celal Yucel
Keyword(s):  
Sweet Sorghum ◽  
Ethanol Yield ◽  
Renewable Energy Sources ◽  
Block Design ◽  
Sugar Yield ◽  
Energy Sources ◽  
Juice Yield ◽  
Stalk Yield ◽  
Sorghum Genotypes ◽  
Theoretical Ethanol Yield

The fossil energy sources used in the world are gradually decreasing and limited. Fossil fuels cause environmental pollution, and the unit price is constantly increasing. For this reason, demand for cheaper and renewable energy sources that do not pollute the environment is increasing day by day. The sweet sorghum plant has attracted attention in recent years with its high biomass yield, sugar content and bioethanol yield. In this study, it was aimed to determine the bio-fuel potential of some sweet sorghum genotypes in semi-arid climatic conditions. The experiment was set up in randomized complete block design with 4 replicates. Research was carried out in 2015 under Harran Plain (36o 42’ N and 38o 58’ E) second crop conditions, Sanliurfa, Turkey. In the study 49 genotypes of sweet sorghum were used. Stalk yield, juice yield, syrup yield, brix, sugar yield and theoretical ethanol yield were determined in the study. Significant differences were found between the genotypes for tested characteristics (P≤0.01). Stalk yield ranged from 7110.0 kg da-1 to 24262.5 da-1, juice yield from 2550.0 L da-1 to 12187.5 L da-1, syrup yield from 291.4 L da-1 to 2242.5 L da-1. Also, brix value varied between %7.0 and %18.87, sugar yield between 247.7 da-1 and 1906.1 da-1, Theoretical ethanol yield between 131.9 L da-1 and 1014.8 L da-1. Considering to stalk yield, juice and syrup yield, brix, sugar yield and theoretical ethanol yield; Nebraska sugar, Topper 76, Smith, M81E and Corina genotypes were found as the best. As a result of research, 21 genotypes with better performance than the others were selected for further studies.

Biomass Production of Switchgrass in Saline-Alkali Land

2014 ◽  
Vol 1008-1009 ◽  
pp. 93-96 ◽  
Author(s):  
Ji Li Liu ◽  
Na Wu
Keyword(s):  
Survival Rate ◽  
Biomass Yield ◽  
Ethanol Yield ◽  
Lignin Content ◽  
Calorific Value ◽  
Fuel Quality ◽  
Alkali Stress ◽  
Theoretical Ethanol Yield ◽  
Biomass Increase

A field experiment was carried out to study the growth characteristics of switchgrass cultivated in saline-alkali lands. The results show that: the survival rate, plant height, tiller numbers per plant and biomass yield of switchgrass significantly reduce with the increasing magnitude of salinity-alkalinity stresses. Switchgrass can grow in saline-alkali environments, the survival rate is more than 85%, and the overwintering rate is more than 95%. Switchgrass plants grow better in mild and moderate saline-alkali lands, and it achieve the highest biomass yield and theoretical ethanol yield of 14.3 t/ha and 5958.8 l/ha respectively, in the third year. With saline-alkali stress, ash and lignin content of switchgrass biomass increase, calorific value, cellulose and hemicelluloses content of switchgrass biomass decrease, and fuel quality of switchgrass biomass reduce to a certain extent.

scholarly journals Temporal and Spatial Variation in Switchgrass Biomass Composition and Theoretical Ethanol Yield

2012 ◽  
Vol 104 (1) ◽  
pp. 54-64 ◽  
Author(s):  
M. R. Schmer ◽  
K. P. Vogel ◽  
R. B. Mitchell ◽  
B. S. Dien ◽  
H. G. Jung ◽  
...  
Keyword(s):  
Spatial Variation ◽  
Ethanol Yield ◽  
Biomass Composition ◽  
Temporal And Spatial Variation ◽  
Temporal And Spatial ◽  
Theoretical Ethanol Yield

scholarly journals Introduction and Economical Value of Some Species of the Malvaceae Family in the Republic of Moldova

2018 ◽  
Vol 1 (1) ◽  
pp. 126-133
Author(s):  
Victor Ţîţei ◽  
Alexandru Teleuță
Keyword(s):  
Organic Matter ◽  
Medicago Sativa ◽  
Nutritive Value ◽  
Ethanol Yield ◽  
Botanical Garden ◽  
Metabolizable Energy ◽  
The Family ◽  
Biomethane Production ◽  
Digestible Protein ◽  
Theoretical Ethanol Yield

Abstract The family Malvaceae includes about 243 genera and at least 4 225 species of herbs, shrubs and trees. They are widely varied and include several important crops, which are mainly used as sources of fibre, food and beverages, medicines, timber. The species of the family Malvaceae: annual, Malva crispa and Malva meluca, native to East Asia, and perennial, Sida hermaphrodita, from North America, grown in monoculture in the experimental land of the Botanical Garden (Institute), served as subjects of the research, and the traditional crop Medicago sativa was used as control. The importance of the studied species of the family Malvaceae consists in their very rapid emergence and fast growth. The analysis of the chemical composition suggested that the dry matter of the studied species, at the 1st mowing contained 15.67-21.67 % raw protein, 2.15-4.46 % raw fats, 8.35-11.53 % minerals and 34.74-40.66 % nitrogen free extract, Medicago sativa - 17.03 %, 2.30 %, 33.31 %, 8.01 % and 39.41 % respectively, making them good candidates for use as livestock feed and for biomethane production. The nutritive value of 100 kg fresh mass of the studied Malvaceae species was 14.9-16.6 nutritive units and 153-173 MJ metabolizable energy, a nutritive unit contained 154.2-191.0 g digestible protein with high concentrations of limiting amino acids, the control - 21 nutritive units, 228 MJ and 164.3 g digestible protein, respectively. The calculated capacity of biomethane production of the studied Malvaceae species can reach 231-267 l/kg organic matter, Medicago sativa - 248 l/kg organic matter. The theoretical ethanol yield from structural carbohydrates of the dry biomass of stalks averaged 437-527 L/t in Malvaceae species, as compared to 485 L/t in corn. The best results were achieved by Sida hermaphrodita, due to its high amount of structural carbohydrates. These species may serve as feed for livestock, but also as multi-purpose feedstock for biorefinery in Moldova.

scholarly journals Assessing Ethanol Yield from Fermented Juice of Local and Exotic Sweet Sorghum Varieties Grown in Sudan

2021 ◽  
Vol 12 ◽  
pp. 11-17
Author(s):  
Salma I. Abdalbagi ◽  
Maarouf I. Mohammed
Keyword(s):  
Regression Analysis ◽  
Sweet Sorghum ◽  
Cultural Practices ◽  
Ethanol Yield ◽  
Correlation And Regression Analysis ◽  
Juice Yield ◽  
Ethanol Yields ◽  
Significant Regression ◽  
Theoretical Ethanol Yield ◽  
Fermented Juice

An experiment was conducted in 2017 at Alwaha Project, Khartoum State to study the potential of ethanol yield from fermented juice of local and exotic sweet sorghums. 40 genotypes were arranged in RCB design. Juice yield, ethanol yield as percentage of fermented juice, actual and theoretical ethanol yields were studied. The Baker’s yeast (Saccharomyces cerevisiae) was used in the fermentation process. ANOVA tests, correlation and regression analysis of actual vs theoretical ethanol yield were performed. Significant differences were detected among genotypes for ethanol yields. High ethanol yields as percentage from fermented juice were obtained, but ethanol yield per hectare was relatively low due to low juice yields. The genotypes BlueRibbon and KensasCollies from exotic materials; 5AbjSG51 and S.154 Ab70 from local materials were identified as promising for ethanol production. Correlation between actual ethanol yield and Juice yield was positive and highly significant. Regression analysis indicated that theoretical ethanol yield was little bit overestimated. It was concluded that juice yield is more crucial than ethanol concentration in maximizing ethanol yield of sweet sorghum. More efforts are needed to develop high juice-yielding genotypes. Juice maximization can also be achieved by using efficient milling devices and optimizing cultural practices.

scholarly journals Evaluating and engineering Saccharomyces cerevisiae promoters for increased amylase expression and bioethanol production from raw starch

2020 ◽  
Vol 20 (6) ◽  
Author(s):  
Marthinus W Myburgh ◽  
Shaunita H Rose ◽  
Marinda Viljoen-Bloom
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Corn Starch ◽  
Consolidated Bioprocessing ◽  
Ethanol Yield ◽  
Small Scale ◽  
Bioethanol Production ◽  
Raw Starch ◽  
Broken Rice ◽  
Available Carbon ◽  
Theoretical Ethanol Yield

ABSTRACT Bioethanol production from starchy biomass via consolidated bioprocessing (CBP) will benefit from amylolytic Saccharomyces cerevisiae strains that produce high levels of recombinant amylases. This could be achieved by using strong promoters and modification thereof to improve gene expression under industrial conditions. This study evaluated eight endogenous S. cerevisiae promoters for the expression of a starch-hydrolysing α-amylase gene. A total of six of the native promoters were modified to contain a promoter-proximal intron directly downstream of the full-length promoter. Varying results were obtained; four native promoters outperformed the ENO1P benchmark under aerobic conditions and two promoters showed better expression under simulated CBP conditions. The addition of the RPS25A intron significantly improved the expression from most promoters, displaying increased transcript levels, protein concentrations and amylase activities. Raw starch-utilising strains were constructed through co-expression of selected α-amylase cassettes and a glucoamylase gene. The amylolytic strains displayed improved fermentation vigour on raw corn starch and broken rice, reaching 97% of the theoretical ethanol yield and converting 100% of the available carbon to products within 120 h in small-scale CBP fermentations on broken rice. This study showed that enhanced amylolytic strains for the conversion of raw starch to ethanol can be achieved through turnkey promoter selection and/or engineering.

scholarly journals Production of bioethanol from sago hampas via Simultaneous Saccharification and Fermentation (SSF)

2018 ◽  
Vol 10 (4) ◽  
pp. 240-245 ◽  
Author(s):  
HUANG CHAI HUNG ◽  
DAYANG SALWANI AWANG ADENI ◽  
QUEENTETY JOHNNY ◽  
MICKY VINCENT
Keyword(s):  
Simultaneous Saccharification And Fermentation ◽  
Ethanol Yield ◽  
Cellulolytic Enzymes ◽  
Total Biomass ◽  
Bioethanol Production ◽  
Amylolytic Enzymes ◽  
Theoretical Ethanol Yield ◽  
Waste Accumulation ◽  
Biomass Reduction ◽  
Simultaneous Saccharification

Huang CH, Adeni DSA, Johnny Q, Vincent M. 2018. Production of bioethanol from sago hampas via Simultaneous Saccharification and Fermentation (SSF). Nusantara Bioscience 10: 240-245. Sago hampas is an inexpensive, renewable and abundant agro-industrial residue that can be exploited to produce bioethanol. In this study, ethanol production was performed via simultaneous saccharification and fermentation (SSF) on fresh sago hampas at 2.5%, 5.0% and 7.5% (w/v) feedstock loadings with the aid of amylolytic enzymes, cellulolytic enzymes and Saccharomyces cerevisiae, under anaerobic condition for five days with a constant agitation of 150 rpm and ambient temperature. Results obtained indicated that SSF with 5.0% (w/v) sago hampas loading produced the highest ethanol yield at 17.79 g/L (79.65% Theoretical Ethanol Yield, TEY), while SSF using 2.5% and 7.5% (w/v) sago hampas produced ethanol at only 8.38 g/L (75.00% TEY) and 23.28 g/L (69.48% TEY), respectively. Total biomass reduction was recorded between 66.3% to 71.3% by the end of the SSF period. This study demonstrated that fresh sago hampas is a promising feedstock for bioethanol production as yields are generally high for all the substrate loadings tested. Moreover, bioethanol production using fresh sago hampas may assist in reducing pollution caused by sago waste accumulation.

Sign in / Sign up

Export Citation Format

Share Document