keyword
MENU ▼
Read by QxMD icon Read
search

Lignocellulose

keyword
https://www.readbyqxmd.com/read/29793209/effect-of-thermal-pretreatment-on-chemical-composition-physical-structure-and-biogas-production-kinetics-of-wheat-straw
#1
Asad Ayub Rajput, Zeshan, Chettiyappan Visvanathan
Hard lignocellulosic structure of wheat straw is the main hindrance in its anaerobic digestion. Thus, a laboratory scale batch experiment was conducted to study the effect of thermal pretreatment on anaerobic digestion of wheat straw. For this purpose, different thermal pretreatment temperatures of 120, 140, 160 and 180 °C were studied and the results were compared with raw wheat straw. Significant differences in biogas production were observed at temperature higher than 160 °C. Highest biogas yield of 615 Nml/gVS and volatile solids reduction of 69% was observed from wheat straw pretreated at 180 °C...
May 21, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29791080/one-step-lignocellulose-fractionation-using-2-5-furandicarboxylic-acid-as-biogenic-and-recyclable-catalyst
#2
Dennis Weidener, Holger Klose, Walter Leitner, Ulrich Schurr, Björn Usadel, Pablo Domínguez de María, Philipp Michael Grande
To develop novel biorefinery concepts, the use of bio-based catalysts and solvents must be aligned with the Green Chemistry principles. In this context biogenic 2,5-furandicarboxylic acid (FDCA) is a very promising, yet underused molecule with high potential application as acid catalyst combining feasibility and sustainability with an efficient and straightforward recovery. In this work, FDCA was evaluated as catalyst in the recently developed OrganoCat pretreatment, a biphasic lignocellulose fractionation system...
May 23, 2018: ChemSusChem
https://www.readbyqxmd.com/read/29786939/an-update-on-enzymatic-cocktails-for-lignocellulose-breakdown
#3
REVIEW
Andreza de Mello Lopes, Edivaldo Ximenes Ferreira Filho, Leonora Rios de Souza Moreira
Alternative energy sources have received increasing attention in recent years. The possibility of adding value to agricultural wastes, by producing biofuels and other products with economic value from lignocellulosic biomass by enzymatic hydrolysis, has been widely explored. Lignocellulosic biomass, as well as being an abundant residue, is a complex recalcitrant structure that requires a consortium of enzymes for its complete degradation. Pools of enzymes with different specificities acting together usually produce an increase in hydrolysis yield...
May 22, 2018: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29785766/schizophyllum-commune-an-unexploited-source-for-lignocellulose-degrading-enzymes
#4
REVIEW
Omar Eduardo Tovar-Herrera, Adriana Mayrel Martha-Paz, Yordanis Pérez-LLano, Elisabet Aranda, Juan Enrique Tacoronte-Morales, María Teresa Pedroso-Cabrera, Katiushka Arévalo-Niño, Jorge Luis Folch-Mallol, Ramón Alberto Batista-García
Lignocellulose represents the most abundant source of carbon in the Earth. Thus, fraction technology of the biomass turns up as an emerging technology for the development of biorefineries. Saccharification and fermentation processes require the formulation of enzymatic cocktails or the development of microorganisms (naturally or genetically modified) with the appropriate toolbox to produce a cost-effective fermentation technology. Therefore, the search for microorganisms capable of developing effective cellulose hydrolysis represents one of the main challenges in this era...
May 21, 2018: MicrobiologyOpen
https://www.readbyqxmd.com/read/29785688/the-influence-of-nonionic-surfactant-adsorption-on-enzymatic-hydrolysis-of-oil-palm-fruit-bunch
#5
Jatuporn Parnthong, Suratsawadee Kungsanant, Sumaeth Chavadej
Nonionic surfactants have been utilized to improve the enzymatic hydrolysis of lignocellulosic materials. However, the role of surfactant adsorption affecting enzymatic hydrolysis has not been elaborated well. In this work, nonionic surfactants differing in their molecular structures, namely the polyoxyethylene sorbitan monooleate (Tween 80), the secondary alcohol ethoxylate (Tergitol 15-S-9), and the branched alcohol ethoxylate (Tergitol TMN-6), were studied for their effects on the enzymatic hydrolysis of palm fruit bunch (PFB)...
May 22, 2018: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29785206/life-cycle-assessment-of-residual-lignocellulosic-biomass-based-jet-fuel-with-activated-carbon-and-lignosulfonate-as-co-products
#6
Francesca Pierobon, Ivan L Eastin, Indroneil Ganguly
Background: Bio-jet fuels are emerging as a valuable alternative to petroleum-based fuels for their potential for reducing greenhouse gas emissions and fossil fuel dependence. In this study, residual woody biomass from slash piles in the U.S. Pacific Northwest is used as a feedstock to produce iso-paraffinic kerosene, through the production of sugar and subsequent patented proprietary fermentation and upgrading. To enhance the economic viability and reduce the environmental impacts of iso-paraffinic kerosene, two co-products, activated carbon and lignosulfonate, are simultaneously produced within the same bio-refinery...
2018: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/29785205/continuous-succinic-acid-fermentation-by-actinobacillus-succinogenes-in-a-packed-bed-biofilm-reactor
#7
Mariateresa Ferone, Francesca Raganati, Alessia Ercole, Giuseppe Olivieri, Piero Salatino, Antonio Marzocchella
Background: Succinic acid is one of the most interesting platform chemicals that can be produced in a biorefinery approach. In this study, continuous succinic acid production by Actinobacillus succinogenes fermentation in a packed-bed biofilm reactor (PBBR) was investigated. Results: The effects of the operating conditions tested, dilution rate (D), and medium composition (mixture of glucose, xylose, and arabinose-that simulate the composition of a lignocellulosic hydrolysate)-on the PBBR performances were investigated...
2018: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/29780372/highly-promiscuous-oxidases-discovered-in-the-bovine-rumen-microbiome
#8
Lisa Ufarté, Gabrielle Potocki-Veronese, Davide Cecchini, Alexandra S Tauzin, Angeline Rizzo, Diego P Morgavi, Bernard Cathala, Céline Moreau, Megane Cleret, Patrick Robe, Christophe Klopp, Elisabeth Laville
The bovine rumen hosts a diverse microbiota, which is highly specialized in the degradation of lignocellulose. Ruminal bacteria, in particular, are well equipped to deconstruct plant cell wall polysaccharides. Nevertheless, their potential role in the breakdown of the lignin network has never been investigated. In this study, we used functional metagenomics to identify bacterial redox enzymes acting on polyaromatic compounds. A new methodology was developed to explore the potential of uncultured microbes to degrade lignin derivatives, namely kraft lignin and lignosulfonate...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29778795/bioaugmentation-with-clostridium-tyrobutyricum-to-improve-butyric-acid-production-through-direct-rice-straw-bioconversion
#9
Xue Chi, Jianzheng Li, Xin Wang, Yafei Zhang, Shao-Yuan Leu, Ying Wang
One-pot bioconversion is an economically attractive biorefinery strategy to reduce enzyme consumption. Direct conversion of lignocellulosic biomass for butyric acid production is still challenging because of competition among microorganisms. In a consolidated hydrolysis/fermentation bioprocessing (CBP) the microbial structure may eventually prefer the production of caproic acid rather than butyric acid production. This paper presents a new bioaugmentation approach for high butyric acid production from rice straw...
May 2, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29778028/functional-lignocellulosic-material-for-the-remediation-of-copper-ii-ions-from-water-towards-the-design-of-a-wood-filter
#10
Selin Vitas, Tobias Keplinger, Nico Reichholf, Renato Figi, Etienne Cabane
In this study, the chemical modification of bulk beech wood is described along with its utilization as biosorbent for the remediation of copper from water. The material was prepared by esterification using anhydrides, and reaction conditions were optimized to propose a greener process, in particular by reducing the amount of solvent. This modification yields a lignocellulosic material whose native structure is preserved, with an increased amount of carboxylic groups (up to 3 mmol/g). We demonstrate that the material can remove up to 95% of copper from low concentration solutions (100- 500 ppm)...
May 9, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29778025/combined-different-dehydration-pretreatments-and-torrefaction-to-upgrade-fuel-properties-of-hybrid-pennisetum-pennisetum-americanum-%C3%A3-p-purpureum
#11
Yan Yu, Guanghui Wang, Xiaopeng Bai, Jude Liu, Decheng Wang, Zhiqin Wang
Different dehydrating methods combined with torrefaction were investigated to find the underlying mechanism that how dehydration process influence the degree of hornification. Hybrid pennisetum was selected as the experiment material. Oven-dried sample (ODS), crushed dried sample (CDS), and sun-cured dried sample (SDS) were torrefied under the temperature of 275 °C and 300 °C with the duration time of 60 min. The results showed that, changes in elevated carbon content and higher heating value (HHV) and reduced oxygen content of SDS were the most obvious under identical torrefaction conditions...
May 16, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29778024/simultaneous-glucose-production-from-cellulose-and-fouling-reduction-using-a-magnetic-responsive-membrane-reactor-with-superparamagnetic-nanoparticles-carrying-cellulolytic-enzymes
#12
Abaynesh Yihdego Gebreyohannes, Madhav Dharmjeet, Tom Swusten, Matthias Mertens, Joran Verspreet, Thierry Verbiest, Christophe M Courtin, Ivo F J Vankelecom
This work aimed at investigating simultaneous hydrolysis of cellulose and in-situ foulant degradation in a cellulose fed superparamagnetic biocatalytic membrane reactor (BMRSP ). In this reactor, a dynamic layer of superparamagnetic bionanocomposites with immobilized cellulolytic enzymes were reversibly immobilized on superparamagnetic polymeric membrane using an external magnetic field. The formation of a dynamic layer of bionanocomposites on the membrane helped to prevent direct membrane-foulant interaction...
May 2, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29777997/rumen-fluid-fermentation-for-enhancement-of-hydrolysis-and-acidification-of-grass-clipping
#13
Siqi Wang, Guangming Zhang, Panyue Zhang, Xiaowen Ma, Fan Li, Haibo Zhang, Xue Tao, Junpei Ye, Mohammad Nabi
Rumen fluid, formed in rumen of ruminants, includes a complex microbial population of bacteria, protozoa, fungi and archaea, and has high ability to degrade lignocellulosic biomass. In this study, rumen fluid was used to ferment grass clipping for enhancing the hydrolysis and acidification of organic matters. Results showed that strict anaerobic condition, higher grass clipping content and smaller particle size of grass clipping were beneficial to the hydrolysis and acidification of organics. The increase of SCOD and total VFA concentration respectively reached 24...
May 16, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29776722/flammulina-velutipes-treatment-of-non-sterile-tall-wheat-grass-for-enhancing-biodegradability-and-methane-production
#14
Agnieszka Kasprzycka, Justyna Lalak-Kańczugowska, Jerzy Tys
In this study fungal pretreatment of non-sterile tall wheat grass via the white rot fungi Flammulina velutipes was studied and the effect on biodegradability of lignocellulosic biomass and methane production, was evaluated. Degradation of lignin, cellulose, hemicellulose, and dry matter in non-sterile tall wheat grass during 28 days of fungal pretreatment using different inoculum ratio (0%-50%) and moisture content (MC) (45% MC, 65% MC, and 75% MC) were assessed via comparison to untreated biomass. Pretreatment with F...
May 9, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29776010/enhanced-furfural-yields-from-xylose-dehydration-in-the-gamma-valerolactone-water-solvent-system-at-elevated-temperatures
#15
Canan Sener, Ali Hussain Motagamwala, David Martin Alonso, James Dumesic
High yields of furfural (>90%) were achieved from xylose dehydration in a sustainable solvent system composed of -valerolactone (GVL), a biomass derived solvent, and water. It is identified that high reaction temperatures (e.g., 498 K) are required to achieve high furfural yield. Additionally, it is shown that the furfural yield at these temperatures is independent of the initial xylose concentration, and high furfural yield is obtained for industrially relevant xylose concentrations (10 wt%). A reaction kinetics model is developed to describe the experimental data obtained with solvent system composed of 80 wt% GVL and 20 wt% water across the range of reaction conditions studied (473 - 523 K, 1-10 mM acid catalyst, 66 - 660 mM xylose concentration)...
May 18, 2018: ChemSusChem
https://www.readbyqxmd.com/read/29775713/enhancement-of-catalytic-activity-and-thermostability-of-a-thermostable-cellobiohydrolase-from-chaetomium-thermophilum-by-site-directed-mutagenesis
#16
Chao Han, Weiguang Li, Chengyao Hua, Fengqing Sun, Pengsheng Bi, Qunqing Wang
Enzymatic saccharification of lignocellulosic biomass is increasingly applied in agricultural and industrial applications. Nevertheless, low performance in the extreme environment severely prevents the utilization of commercial enzyme preparations. To obtain cellobiohydrolases with improved catalytic activity and thermostability, structure-based rational design was performed based on a thermostable cellobiohydrolase CtCel6 from Chaetomium thermophilum. In the present study, four conserved and noncatalytic residue substitutions were generated via site-directed mutagenesis...
May 15, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29773074/enhanced-cellulase-production-in-trichoderma-reesei-rut-c30-via-constitution-of-minimal-transcriptional-activators
#17
Jiajia Zhang, Guoxiu Zhang, Wei Wang, Wei Wang, Dongzhi Wei
BACKGROUND: Cellulase can convert lignocellulosic feedstocks into fermentable sugars, which can be used for the industrial production of biofuels and chemicals. The high cost of cellulase production remains a challenge for lignocellulose breakdown. Trichoderma reesei RUT C30 serves as a well-known industrial workhorse for cellulase production. Therefore, the enhancement of cellulase production by T. reesei RUT C30 is of great importance. RESULTS: Two sets of novel minimal transcriptional activators (DBDace2 -VP16 and DBDcre1 -VP16) were designed and expressed in T...
May 17, 2018: Microbial Cell Factories
https://www.readbyqxmd.com/read/29773073/metabolome-analysis-based-design-and-engineering-of-a-metabolic-pathway-in-corynebacterium-glutamicum-to-match-rates-of-simultaneous-utilization-of-d-glucose-and-l-arabinose
#18
Hideo Kawaguchi, Kumiko Yoshihara, Kiyotaka Y Hara, Tomohisa Hasunuma, Chiaki Ogino, Akihiko Kondo
BACKGROUND: L-Arabinose is the second most abundant component of hemicellulose in lignocellulosic biomass, next to D-xylose. However, few microorganisms are capable of utilizing pentoses, and catabolic genes and operons enabling bacterial utilization of pentoses are typically subject to carbon catabolite repression by more-preferred carbon sources, such as D-glucose, leading to a preferential utilization of D-glucose over pentoses. In order to simultaneously utilize both D-glucose and L-arabinose at the same rate, a modified metabolic pathway was rationally designed based on metabolome analysis...
May 17, 2018: Microbial Cell Factories
https://www.readbyqxmd.com/read/29772563/assessment-of-different-pretreatment-technologies-for-efficient-bioconversion-of-lignocellulose-to-ethanol
#19
Jitendra K Singh, Preeti Vyas, Anamika Dubey, Chandrama Prakash Upadhyaya, Richa Kothari, Vineet Veer Tyagi, Ashwani Kumar
The future supply of energy to meet growing energy demand of rapidly exapanding populations is based on wide energy resources, particularly the renewable ones. Among all resources, lignocellulosic biomasses such as agriculture, forest, and agro-industrial residues are the most abundant and easily available bioresource for biorefineries to provide fuels, chemicals, and materials. However, pretreatment of biomass is required to overcome the physical and chemical barriers that exist in the lignin-carbohydrate composite and pretreatment facilitate the entry of biocatalysts for the conversion of biomass into fermentable sugars and other by-products...
June 1, 2018: Frontiers in Bioscience (Scholar Edition)
https://www.readbyqxmd.com/read/29772501/insights-into-the-effect-of-the-catalytic-functions-on-selective-production-of-ethylene-glycol-from-lignocellulosic-biomass-over-carbon-supported-ruthenium-and-tungsten-catalysts
#20
Lucília Sousa Ribeiro, José J Melo Órfão, Manuel Fernando Ribeiro Pereira
The one-pot conversion of cellulose to ethylene glycol (EG) was investigated using a combination of a ruthenium catalyst supported on carbon nanotubes modified with nitric acid (Ru/CNT1 ) and a tungsten catalyst supported on commercial non-treated carbon nanotubes (W/CNT0 ). This physical mixture allowed to obtain an EG yield of 41% in just 5 h at 205 °C and 50 bar of H2 , which overcame the result obtained using a Ru-W bimetallic catalyst supported on commercial carbon nanotubes (35%) under the same conditions...
May 9, 2018: Bioresource Technology
keyword
keyword
102270
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"