scholarly journals Synergistic effects of mixing hybrid poplar and wheat straw biomass for bioconversion processes

2015 ◽  
Vol 8 (1) ◽  
Author(s):  
Rodrigo Morales Vera ◽  
Renata Bura ◽  
Rick Gustafson
Keyword(s):  
Wheat Straw ◽  
Synergistic Effects ◽  
Hybrid Poplar ◽  
Wheat Straw Biomass

Analysis on Active Behavior of Wheat Straw by Py-GC-MS

2012 ◽  
Vol 496 ◽  
pp. 189-193
Author(s):  
Hai Yan Guo ◽  
Zhen Zhen Zheng
Keyword(s):  
Acetic Acid ◽  
Wheat Straw ◽  
Octadecenoic Acid ◽  
Active Behavior ◽  
Wheat Straw Biomass

In order to find out its active behavior, the extractives of wheat straw biomass were adsorbed and determined by Py-GC-MS. And the main constituents were eicosane, stigmasterol, 22,23-dihydro-, .gamma.-sitosterol, stigmasterol, campesterol, nonacosane, stigmast-4-en-3-one, lup-20(29)-en-3-one, 13-tetradecen-1-ol acetate, 1,3-butadiene, 2- methyl-, 9-octadecenoic acid, (e)-, acetic acid, stigmast-5-en-3-ol, oleate, 1-nonadecene, heptacosane, 4,22-stigmastadiene-3-one, 4-((1e)-3-hydroxy-1-propenyl)-2- methoxyphenol, 1-heptene, 2-isohexyl-6-methyl-, etc.

Optimization of Pre-treatment Using RSM on Wheat Straw and Production of Lactic Acid Using Thermotolerant, Inhibitor Tolerant and Xylose Utilizing Bacillus Sonorenesis Strain DGS15

2022 ◽  
Author(s):  
Simarpreet Kaur Chawla ◽  
Dinesh Goyal
Keyword(s):  
Lactic Acid ◽  
Wheat Straw ◽  
Lignocellulosic Biomass ◽  
Fermentation Broth ◽  
Lactic Acid Production ◽  
Reducing Sugar ◽  
Hot Water ◽  
Pre Treatment ◽  
Wheat Straw Biomass ◽  
Pretreated Biomass

Abstract Thermotolerant lactic acid producing bacteria, isolated from red soil of brick kiln was identified by 16S rRNA sequencing as Bacillus sonorenesis , which showed remarkable capability to ferment sugars of lignocellulosic biomass after pre-treatment, yielding 0.97 g/g lactic acid with overall productivity of 0.38 g L -1/ h. RSM was employed to optimize the sulphuric acid pre-treatment combined with dilute NaOH and hot water pre-treatment. Pretreated wheat straw biomass had 40.4% cellulose, 18.4% hemicellulose, 12.4% lignin and 28.2 g L -1 reducing sugar, while native wheat straw biomass had 36% cellulose, 25% hemicellulose, 20% total lignin, and 0.94 g L -1 reducing sugar. Scanning electron microscopy (SEM) revealed that the ordered and compact structure of wheat straw was destroyed upon pre-treatment. X-ray diffractogram (XRD) revealed 9.71% increase in crystallinity index ( CrI ) in pretreated biomass. FTIR spectrogram showed removal of lignin due to reduction of peak at 1640 cm -1 in pretreated biomass. Bacillus sonorenesis DGS15 is inhibitor tolerant (furfural (1.2 g L -1 ) and HMF (2.4 g L -1 )). Furfural was consumed after 72 h of fermentation and HMF got accumulated with 3.75-fold increase in concentration in the fermentation broth. In terms of final concentration, yield, and fermentation duration, this is the best performance of DGS15 for lactic acid production utilizing xylose, glucose as the carbon source. All of these findings showed that the thermotolerant Bacillus sonorenesis strain DGS15 is a novel, attractive candidate for producing lactic acid from lignocellulosic biomass.

scholarly journals Physical and calorific properties of wheat straw briquettes and pellets

2019 ◽  
Vol 290 ◽  
pp. 11011
Author(s):  
Cosmin Spirchez ◽  
Aurel Lunguleasa ◽  
Constantin Ionescu ◽  
Catalin Croitoru
Keyword(s):  
Moisture Content ◽  
Physical Properties ◽  
Wheat Straw ◽  
High Performance ◽  
Calorific Value ◽  
Ash Content ◽  
Effective Density ◽  
Final Conclusion ◽  
Density Method ◽  
Wheat Straw Biomass

Wheat straw briquettes are high performance combustible products obtained by densification from the wheat straw biomass without the use of additional adhesives or additives. The purpose of the paper is to analyze and to detail the physical properties (SR EN ISO / CEI 322 for moisture content by method of drying and weighing, and effective density method according to SR EN ISO / CEI 323: 2005) and calorific properties of these briquettes (high and low calorific value according to ÖNORM M7135 using the XRY-1C / China Calorimeter and ash content according to ASTM D1102-84: 2013 and ISO 18122: 2015) and to make a comparison between these briquettes and other briquettes obtained from wooden biomass. The tested briquettes had a moisture content of 8%, an effective density of 1214 kg/m3, a high calorific value of 17.670 MJ/kg, the low of 17.525 MJ/kg and an ash content of 5.6%. All these values correspond to the permissible limits of the standards in the field. The final conclusion of the paper shows that wheat straw briquettes had physical and calorific properties similar to those of wooden biomass.

Wheat straw biomass: A resource for high-value chemicals

2013 ◽  
Vol 49 (1) ◽  
pp. 51-67 ◽  
Author(s):  
Morris Schnitzer ◽  
Carlos M. Monreal ◽  
Erin E. Powell
Keyword(s):  
Wheat Straw ◽  
Wheat Straw Biomass

scholarly journals Generation of Electricity and Analysis of Microbial Communities in Wheat Straw Biomass-Powered Microbial Fuel Cells

2009 ◽  
Vol 75 (11) ◽  
pp. 3389-3395 ◽  
Author(s):  
Yifeng Zhang ◽  
Booki Min ◽  
Liping Huang ◽  
Irini Angelidaki
Keyword(s):  
Fuel Cells ◽  
Chemical Oxygen Demand ◽  
Microbial Communities ◽  
Microbial Ecology ◽  
Wheat Straw ◽  
Microbial Fuel Cells ◽  
Electricity Generation ◽  
Oxygen Demand ◽  
Wheat Straw Hydrolysate ◽  
Wheat Straw Biomass

ABSTRACT Electricity generation from wheat straw hydrolysate and the microbial ecology of electricity-producing microbial communities developed in two-chamber microbial fuel cells (MFCs) were investigated. The power density reached 123 mW/m2 with an initial hydrolysate concentration of 1,000 mg chemical oxygen demand (COD)/liter, while coulombic efficiencies ranged from 37.1 to 15.5%, corresponding to the initial hydrolysate concentrations of 250 to 2,000 mg COD/liter. The suspended bacteria found were different from the bacteria immobilized in the biofilm, and they played different roles in electricity generation from the hydrolysate. The bacteria in the biofilm were consortia with sequences similar to those of Bacteroidetes (40% of sequences), Alphaproteobacteria (20%), Bacillus (20%), Deltaproteobacteria (10%), and Gammaproteobacteria (10%), while the suspended consortia were predominately Bacillus (22.2%). The results of this study can contribute to improving understanding of and optimizing electricity generation in microbial fuel cells.

scholarly journals Sugar production from wheat straw biomass by alkaline extrusion and enzymatic hydrolysis

2016 ◽  
Vol 86 ◽  
pp. 1060-1068 ◽  
Author(s):  
Michelle Cardoso Coimbra ◽  
Aleta Duque ◽  
Felicia Saéz ◽  
Paloma Manzanares ◽  
Crispin Humberto Garcia-Cruz ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Wheat Straw ◽  
Sugar Production ◽  
Wheat Straw Biomass

Production of Omega-3 Fatty Acids from the Microalga Crypthecodinium cohnii by Utilizing Both Pentose and Hexose Sugars from Agricultural Residues

Fermentation ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. 219
Author(s):  
Georgia Asimakopoulou ◽  
Anthi Karnaouri ◽  
Savvas Staikos ◽  
Stylianos D. Stefanidis ◽  
Konstantinos G. Kalogiannis ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Wheat Straw ◽  
Agricultural Sector ◽  
Liquid Fraction ◽  
Carbon Sources ◽  
Omega 3 Fatty Acids ◽  
Omega 3 ◽  
Crypthecodinium Cohnii ◽  
Hexose Sugars ◽  
Wheat Straw Biomass

The core objective of this work was to take advantage of the unexploited wheat straw biomass, currently considered as a broadly available waste stream from the Greek agricultural sector, towards the integrated valorization of sugar streams for the microbial production of polyunsaturated omega-3 fatty acids (PUFAs). The OxiOrganosolv pretreatment process was applied using acetone and ethanol as organic solvents without any additional catalyst. The results proved that both cellulose-rich solid pulp and hemicellulosic oligosaccharides-rich aqueous liquid fraction after pretreatment can be efficiently hydrolyzed enzymatically, thus resulting in high yields of fermentable monosaccharides. The latter were supplied as carbon sources to the heterotrophic microalga Crypthecodinium cohnii for the production of PUFAs, more specifically docosahexaenoic acid (DHA). The solid fractions consisted mainly of hexose sugars and led to higher DHA productivity than their pentose-rich liquid counterparts, which can be attributed to the different carbon source and C/N ratio in the two streams. The best performance was obtained with the solid pulp pretreated with ethanol at 160 °C for 120 min and an O2 pressure of 16 bar. The total fatty acids content reached 70.3 wt% of dried cell biomass, of which 32.2% was DHA. The total DHA produced was 7.1 mg per g of untreated wheat straw biomass.

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