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https://www.readbyqxmd.com/read/30316159/a-bio-electro-fenton-system-with-a-facile-anti-biofouling-air-cathode-for-efficient-degradation-of-landfill-leachate
#1
Dongliang Wang, Huijie Hou, Jingping Hu, Jikun Xu, Long Huang, Shaogang Hu, Sha Liang, Keke Xiao, Bingchuan Liu, Jiakuan Yang
Bio-electro-Fenton (BEF) system holds great potential for sustainable degradation of refractory organics. Activated carbon (AC) air cathode was modified by co-pyrolyzing of AC with glucose and doping with nano-zero-valent iron (denoted as nZVI@MAC) in order to promote two-electron oxygen reduction reaction (2e- ORR) for enhanced oxidizing performance. Single chamber microbial fuel cells (SCMFCs) with nZVI@MAC cathode was examined to degrade landfill leachate. It was revealed that nZVI@MAC cathode SCMFC showed higher degradation efficiency towards landfill leachate...
October 5, 2018: Chemosphere
https://www.readbyqxmd.com/read/30296937/restoration-of-biofuel-production-levels-and-increased-tolerance-under-ionic-liquid-stress-is-enabled-by-a-mutation-in-the-essential-escherichia-coli-gene-cydc
#2
Thomas Eng, Philipp Demling, Robin A Herbert, Yan Chen, Veronica Benites, Joel Martin, Anna Lipzen, Edward E K Baidoo, Lars M Blank, Christopher J Petzold, Aindrila Mukhopadhyay
BACKGROUND: Microbial production of chemicals from renewable carbon sources enables a sustainable route to many bioproducts. Sugar streams, such as those derived from biomass pretreated with ionic liquids (IL), provide efficiently derived and cost-competitive starting materials. A limitation to this approach is that residual ILs in the pretreated sugar source can be inhibitory to microbial growth and impair expression of the desired biosynthetic pathway. RESULTS: We utilized laboratory evolution to select Escherichia coli strains capable of robust growth in the presence of the IL, 1-ethyl-3-methyl-imidizolium acetate ([EMIM]OAc)...
October 8, 2018: Microbial Cell Factories
https://www.readbyqxmd.com/read/30280334/characterization-of-pyrolysis-bio-oil-derived-from-intermediate-pyrolysis-of-aegle-marmelos-de-oiled-cake-study-on-performance-and-emission-characteristics-of-c-i-engine-fueled-with-aegle-marmelos-pyrolysis-oil-blends
#3
Baranitharan Paramasivam, Ramesh Kasimani, Sakthivel Rajamohan
The present research focuses on the analyzing the characteristics of bio-oil derived from intermediate pyrolysis of Aegle marmelos (AM) seed cake and its suitability for C.I. engine adaptation. Owing to the high volatile matter content of 73.69%, Aegle marmelos biomass was selected as the feedstock for this research. The intermediate pyrolysis was carried out at 600 °C in a 2-kg fixed bed type pyrolysis reactor at a heating rate of 10 °C/min and the obtained bio-oil was characterized by different analytical methods...
October 2, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30256626/quantitative-evaluation-of-an-integrated-system-for-valorization-of-wastewater-algae-as-bio-oil-fuel-gas-and-fertilizer-products
#4
Yalin Li, William A Tarpeh, Kara L Nelson, Timothy J Strathmann
Algal systems have emerged as a promising strategy for simultaneous treatment and valorization of wastewater. However, further advancement and real-world implementation are hindered by the limited knowledge on the full energetic and nutrient product potentials of such systems and the corresponding value of these products. In this work, an aqueous-based system for the conversion of wastewater-derived algae and upgrading of crude products was designed and demonstrated. Bio-oil, fuel gas, and fertilizer products were generated from algal biomass harvested from a municipal wastewater treatment facility...
September 26, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/30253348/efficient-gas-phase-voc-removal-and-electricity-generation-in-an-integrated-bio-photo-electro-catalytic-reactor-with-bio-anode-and-tio-2-photo-electro-catalytic-air-cathode
#5
Lihong Wang, Lifen Liu, Fenglin Yang
An efficient and cost-effective bio-photo-electro-catalytic reactor (BPEC) was developed, it combined bio-anode with TiO2 photo-electro-catalytic air cathode and could remove rapidly model gas phase VOC ethyl acetate (EA) and generate electricity simultaneously. This BPEC system exhibited a synergistic effect between the photo-electro-catalysis and microbial fuel cell (MFC) bio-electrochemical process. Calculated kinetic constant of the BPEC system (0.085 min-1 ) was twice the sum of those of photocatalysis (only electrolyte in the anode, without microbes, 0...
September 8, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30248442/bio-oil-production-from-microalgae-via-hydrothermal-liquefaction-technology-under-subcritical-water-conditions
#6
P Kiran Kumar, S Vijaya Krishna, Kavita Verma, K Pooja, D Bhagawan, K Srilatha, V Himabindu
The upsurge in the concerning issues like global warming, environmental pollution and depletion of fossil fuel resources led to the thrust on third generation biofuels. Algal research has gained a lot of importance in the recent years. Effective utilization of algal biomass in a single step is necessary as it can produce Bio-oil (BO), gases and in addition to a variety of valuable products, along with nutrient recovery. Hydrothermal liquefaction technology does not require the energy intensive drying steps and is an attractive approach for the conversion of algae to liquid fuels...
September 22, 2018: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/30248429/enhancement-of-bio-desulfurization-capability-of-a-newly-isolated-thermophilic-bacterium-using-starch-iron-nanoparticles-in-a-controlled-system
#7
Narges Etemadi, Abbas Akhavan Sepahy, Ghasemali Mohebali, Fatemeh Yazdian, Meisam Omidi
Due to the increasing application of oil and petroleum products, increased environmental contamination has become a matter of concern. Bio-desulfurization process may be used to eliminate sulfur from fossil fuels in the moderate condition. In this study, a thermophilic bacterium was isolated that was able to desulfurize dibenzothiophene. 16S rRNA sequencing indicated that this strain is related closely to Bacillus thermoamylovorans (97%). This strain grew in Basal salt medium containing DBT (100 mgl-1 ) as the only sulfur source, at 55°C and showed maximum growth (OD660  = 0...
September 21, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/30243382/graphene-enhanced-transformation-of-lignin-in-laccase-abts-system-by-accelerating-electron-transfer
#8
Yu Pan, Hua Ma, Liping Huang, Juan Huang, Yan Liu, Ziwei Huang, Wei Li, Jixiang Yang
The degradation of lignin has attracted much attention since it represents approximately 30% of all non-fossil carbon sources and constitutes a sustainable bio-resource for fuels and aromatic derivatives. Here we investigated the degradation of lignin by laccase-catalysed reactions using 2,2'-Azino-bis(3-ethybenzothiazoline-6-sulfonic acid) (ABTS) as a mediator coupled with the carbon material graphene. Results indicated that there was a significant, two-fold, increase in the catalytic activity of lignin degradation in laccase-ABTS systems in the presence of graphene...
December 2018: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/30241063/bioelectricity-generation-using-microalgal-biomass-as-electron-donor-in-a-bio-anode-microbial-fuel-cell
#9
Fabrice Ndayisenga, Zhisen Yu, Yang Yu, Chyi-How Lay, Dandan Zhou
In this study, microalgal biomass waste (Chlorella regularis) was treated while simultaneously producing bioelectricity in a microbial fuel cell (MFC). Algal biomass was the sole electron donor and was enriched with easily biodegradable proteins (46%) and carbohydrates (22%). The generated power density was 0.86 W/m2 and the columbic efficiency reached ∼61.5%.The power generation could be further increased to 1.07 W/m2 by using a biomass waste concentration enhancement strategy with maximum chemical oxygen demand (COD) removal of ∼65...
September 12, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30240143/catalytic-transfer-hydrogenation-of-biomass-derived-substrates-to-value-added-chemicals-on-dual-functional-catalysts-opportunities-and-challenges
#10
Xin Jin, Bin Yin, Qi Xia, Tianqi Fang, Jian Shen, Liquan Kuang, Chaohe Yang
Aqueous phase hydrodeoxygenation (APH) of bio-derived feedstocks into useful chemical building blocks is one the most important processes for biomass conversion. But several technological challenges, such as elevated reaction temperature (220-280 oC), high H2 pressure (4-10 MPa), uncontrollable side reactions and intensive capital investment have bottlenecked further development of existing APH processes. Catalytic transfer hydrogenation (CTH) under much milder conditions using non-fossil based H2 have attracted extensive interests due to several advantageous features, including (i) high atom efficiency (~100%), (ii) low energy intensity, and (iii) green H2 obtained from renewable sources...
September 21, 2018: ChemSusChem
https://www.readbyqxmd.com/read/30226518/functionalised-heterogeneous-catalysts-for-sustainable-biomass-valorisation
#11
REVIEW
Putla Sudarsanam, Ruyi Zhong, Sander Van den Bosch, Simona M Coman, Vasile I Parvulescu, Bert F Sels
Efficient transformation of biomass to value-added chemicals and high-energy density fuels is pivotal for a more sustainable economy and carbon-neutral society. In this framework, developing potential cascade chemical processes using functionalised heterogeneous catalysts is essential because of their versatile roles towards viable biomass valorisation. Advances in materials science and catalysis have provided several innovative strategies for the design of new appealing catalytic materials with well-defined structures and special characteristics...
September 18, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30216073/debundling-dispersion-and-stability-of-multiwalled-carbon-nanotubes-driven-by-molecularly-designed-electron-acceptors
#12
Desi H Gharib, Francois Malherbe, Simon E Moulton
Carbon nanotubes (CNTs) have attracted significant attention because of their outstanding physical and chemical properties, and yet, their high natural tendency to form bundles, ropes, or aggregates, as a consequence of their strong π-π interactions, limits their solvent processing and further applications. Efficient processing solvents, mostly amide-based, that partially compensate for these strong inter-CNT π-π interactions have been widely reported. However, the yield of debundled/dispersed CNTs and the stability of subsequent dispersions in these solvents remain key challenges...
September 28, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/30208553/optimization-of-sensing-performance-in-an-integrated-dual-sensors-system-combining-microbial-fuel-cells-and-upflow-anaerobic-sludge-bed-reactor
#13
Hui Jia, Wenbin Liu, Jie Wang, Huu-Hao Ngo, Wenshan Guo, Hongwei Zhang
Two bio-cathode microbial fuel cells (MFCs) with Upflow anaerobic sludge blanket (UASB) are integrated to construct a UASB-MFC dual sensors system, developed to solve the problems of low accuracy and less information about the single sensor system. The bio-cathode MFC is developed as the biosensor for UASB operation performance and online monitoring. Owing to the biosorption of anaerobic microbes, the MFC in the suspended layer is more suitable for effluent chemical oxygen demand (COD) real-time monitoring, and the MFC in the sludge layer is more suitable for total volatile fatty acid (TVFA) real-time monitoring...
November 2018: Chemosphere
https://www.readbyqxmd.com/read/30186365/hydrogenation-of-co-2-at-ambient-pressure-catalyzed-by-a-highly-active-thermostable-biocatalyst
#14
Fabian M Schwarz, Kai Schuchmann, Volker Müller
Background: Replacing fossil fuels as energy carrier requires alternatives that combine sustainable production, high volumetric energy density, easy and fast refueling for mobile applications, and preferably low risk of hazard. Molecular hydrogen (H2 ) has been considered as promising alternative; however, practical application is struggling because of the low volumetric energy density and the explosion hazard when stored in large amounts. One way to overcome these limitations is the transient conversion of H2 into other chemicals with increased volumetric energy density and lower risk hazard, for example so-called liquid organic hydrogen carriers such as formic acid/formate that is obtained by hydrogenation of CO2 ...
2018: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/30178999/influence-of-alkali-and-alkaline-earth-metals-on-the-cleavage-of-glycosidic-bond-in-biomass-pyrolysis-a-dft-study-using-cellobiose-as-a-model-compound
#15
Jyotsna S Arora, Jia Wei Chew, Samir H Mushrif
Fast pyrolysis is a promising technology for the production of renewable fuels and chemicals from lignocellulosic biomass. The product distribution (bio-oil, char) and the composition of bio-oil are significantly influenced by the presence of naturally occurring alkali and alkaline-earth metals (AAEMs). In this paper, we investigate, at the molecular level, the influence of Na(I), K(I), Ca(II), and Mg(II) ions on glycosidic bond breaking reactions using density functional theory. Glycosidic bond breaking reactions are categorized as direct C-O breaking mechanisms, namely, transglycosylation, glycosylation, and ring contraction and the two-step pathways, which include the mannose pathway, dehydration, and ring opening...
September 27, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/30173009/positively-charged-hierarchical-pedot-interface-with-enhanced-electrode-kinetics-for-nadh-based-biosensors
#16
Lingyin Meng, Anthony P F Turner, Wing Cheung Mak
Poly(ethylenedioxythiophene) (PEDOT) has attracted considerable attention as an advanced electrode material for electrochemical sensors and biosensors, due to its unique electrical and physicochemical properties. Here, we demonstrate the facile preparation of a positively-charged and hierarchical micro-structured PEDOT electrochemical interface with enhanced electrode kinetics for the electrooxidation of NADH. Processable PEDOT colloidal microparticles (PEDOT CMs) were synthesised by template-assisted polymerisation and were then utilised as building blocks for the fabrication of hierarchically-structured electrodes with a larger accessible electroactive surface (2...
November 30, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/30151645/molecular-modeling-approach-to-elucidate-gas-phase-hydrodeoxygenation-of-guaiacol-over-a-pd-111-catalyst-within-dft-framework
#17
Anand Mohan Verma, Nanda Kishore
Excessive amounts of oxy-functional groups in unprocessed bio-oil vitiate its quality as fuel; therefore, it has to be channelized to upgrading processes, and catalytic hydrodeoxygenation is one of the most suitable routes for the upgrading of crude bio-oil. In this computational work, catalytic hydrodeoxygenation (HDO) of guaiacol, which is an important phenolic compound of crude bio-oil, has been carried out using density functional theory (DFT) over a Pd(111) catalyst. The Pd(111) catalyst surface does not endorse direct eliminations of functional groups of guaiacol; however, it is found to perform excellently in stepwise dehydrogenation reactions of oxy-functionals of guaiacol according to present DFT results...
August 27, 2018: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/30133449/landscape-drivers-of-recent-fire-activity-2001-2017-in-south-central-chile
#18
David B McWethy, Aníbal Pauchard, Rafael A García, Andrés Holz, Mauro E González, Thomas T Veblen, Julian Stahl, Bryce Currey
In recent decades large fires have affected communities throughout central and southern Chile with great social and ecological consequences. Despite this high fire activity, the controls and drivers and the spatiotemporal pattern of fires are not well understood. To identify the large-scale trends and drivers of recent fire activity across six regions in south-central Chile (~32-40° S Latitude) we evaluated MODIS satellite-derived fire detections and compared this data with Chilean Forest Service records for the period 2001-2017...
2018: PloS One
https://www.readbyqxmd.com/read/30128456/bio-inspired-self-propelled-diatom-micromotor-by-catalytic-decomposition-of-h-2-o-2-under-low-fuel-concentration
#19
Atanu Panda, Ankireddy Seshadri Reddy, Sada Venkateswarlu, Minyoung Yoon
Recently, active bubble-propelled micromotors have attracted great attention for fuel applications. However, for generating bubble-propelled micromotors, additional catalysts, such as Pt, Ag, and Ru, are required. These catalysts are expensive, toxic, and highly unstable for broad applications. To overcome these issues, in this study, we present an innovative methodology for the preparation of self-propelled motor machines using naturally occurring diatom frustules. This natural diatom motor shows effective motion in the presence of a very low concentration (0...
August 30, 2018: Nanoscale
https://www.readbyqxmd.com/read/30109327/integrated-production-of-bio-jet-fuel-containing-lignin-derived-arenes-via-lipid-deoxygenation
#20
Yijian Lu, Bing Ma, Chen Zhao
We report an integrated production of bio-jet fuel, from dehydrogenation of lignin-derived cycloalkanes and deoxygenation of lipid over PtIr/γ-Al2O3 at 400 °C in the absence of hydrogen. The CO generated in situ via lipid decarbonylation is strongly adsorbed by Ir and subsequently undergoes methanation, with the remaining Pt sites catalyzing cycloalkane dehydrogenation.
August 28, 2018: Chemical Communications: Chem Comm
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