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https://read.qxmd.com/read/30780057/bioremediation-of-wastewater-through-a-quorum-sensing-triggered-mfc-a-sustainable-measure-for-waste-to-energy-concept
#1
REVIEW
Palaniappan Sivasankar, Subramaniam Poongodi, Palaniappan Seedevi, Murugesan Sivakumar, Tamilselvi Murugan, Sivakumar Loganathan
A mission for fast advancement has constrained us to unpredictably tap various natural assets. The reckless utilisation of fossil fuels led unmanageable wastes which have greatly affected our health and environment. Endeavours to address these difficulties have conveyed to the frontal area certain creative natural solutions particularly the utilisation of microbial digestion systems. In the previous two decades, the microbial fuel cell (MFC) innovation has caught the consideration of the researchers. The MFCs is a kind of bio-electrochemical framework with novel highlights, for example, power production, wastewater treatment, and biosensor applications...
February 16, 2019: Journal of Environmental Management
https://read.qxmd.com/read/30780052/improvement-of-bio-crude-oil-properties-via-co-pyrolysis-of-pine-sawdust-and-waste-polystyrene-foam
#2
Quynh Van Nguyen, Yeon Seok Choi, Sang Kyu Choi, Yeon Woo Jeong, Yong Su Kwon
Conversion technology of solid biomass to liquid fuel, named bio-crude oil, has been researched widely for the production of renewable energy to replace fossil fuel oil. As the result of many admirable researches, fast pyrolysis technology for bio-crude oil production is close to commercialization. However, bio-crude oil has unsatisfactory properties compared to general petroleum oil, for instance, low heating value, high water content, and high viscosity. In this study, pine sawdust (SD) biomass was co-pyrolyzed with waste polystyrene foam (WPSF), which was expected to improve the bio-crude oil quality due to high heating value and non-oxygen composition of polystyrene...
February 16, 2019: Journal of Environmental Management
https://read.qxmd.com/read/30759821/on-line-raman-spectroscopic-study-of-cytochromes-redox-state-of-biofilms-in-microbial-fuel-cells
#3
Adolf Krige, Magnus Sjöblom, Kerstin Ramser, Paul Christakopoulos, Ulrika Rova
Bio-electrochemical systems such as microbial fuel cells and microbial electrosynthesis cells depend on efficient electron transfer between the microorganisms and the electrodes. Understanding the mechanisms and dynamics of the electron transfer is important in order to design more efficient reactors, as well as modifying microorganisms for enhanced electricity production. Geobacter are well known for their ability to form thick biofilms and transfer electrons to the surfaces of electrodes. Currently, there are not many "on-line" systems for monitoring the activity of the biofilm and the electron transfer process without harming the biofilm...
February 12, 2019: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://read.qxmd.com/read/30759801/engineering-of-fatty-acid-synthases-fass-to-boost-the-production-of-medium-chain-fatty-acids-mcfas-in-mucor-circinelloides
#4
Syed Ammar Hussain, Ahsan Hameed, Md Ahsanul Kabir Khan, Yao Zhang, Huaiyuan Zhang, Victoriano Garre, Yuanda Song
Increasing energy demands and health-related concerns worldwide have motivated researchers to adopt diverse strategies to improve medium-chain fatty acid (MCFA) biosynthesis for use in the functional food and aviation industries. The abundance of naturally produced MCFAs from botanical sources (i.e., coconut fruit/seeds and palm tree) has been observed to be insufficient compared with the various microorganisms used to cope with industrial demands. Mucor circinelloides is one of many promising microorganisms; it exhibits diverse biotechnological importance ranging from the production of functional lipids to applications in the manufacture of bio-fuel...
February 12, 2019: International Journal of Molecular Sciences
https://read.qxmd.com/read/30744732/carbon-dioxide-captured-by-metal-organic-frameworks-and-its-subsequent-resource-utilization-strategy-a-review-and-prospect
#5
Xinbo Lian, Leilei Xu, Mindong Chen, Cai-E Wu, Wenjing Li, Bingbo Huang, Yan Cui
The carbon dioxide (CO₂) is notorious as the greenhouse gas, which could cause the global warming and climate change. Therefore, the reduction of the atmospheric CO₂ emissions from power plants and other industrial facilities has become as an increasingly urgent concern. In the recent years, CO₂ capture and storage technologies have received a worldwide attention. Adsorption is considered as one of the efficient options for CO₂ capture because of its cost advantage, low energy requirement and extensive applicability over a relatively wide range of temperature and pressure...
June 1, 2019: Journal of Nanoscience and Nanotechnology
https://read.qxmd.com/read/30718075/algal-biorefinery-a-sustainable-approach-to-valorize-algal-based-biomass-towards-multiple-product-recovery
#6
REVIEW
Rashmi Chandra, Hafiz M N Iqbal, Garima Vishal, Hyung-Sool Lee, Sunil Nagra
In recent years, ever-increasing socio-economic awareness, and negative impact of excessive petro consumption have redirected the research interests towards bio-resources such as algal-based biomass. In order to meet current bio-economy challenges to produce high-value multiple products at a time, new integrated processes in research and development are necessary. Though various strategies have been posited for conversion of algal-based biomass to fuel and fine chemicals, none of them has been proved as economically viable and energetically feasible...
April 2019: Bioresource Technology
https://read.qxmd.com/read/30712994/bio-oil-upgrading-with-catalytic-pyrolysis-of-biomass-using-copper-zeolite-nickel-zeolite-and-copper-nickel-zeolite-catalysts
#7
Ravinder Kumar, Vladimir Strezov, Emma Lovell, Tao Kan, Haftom Weldekidan, Jing He, Behnam Dastjerdi, Jason Scott
The bio-oil obtained from a general pyrolysis process contains a higher concentration of oxygenated compounds and the resultant physical and chemical properties make it an unsuitable drop-in fuel. The oxygenated compounds in the bio-oil can be converted into hydrocarbons or less oxygenated compounds with the application of catalysts. This study demonstrated the bio-oil upgrading with the application of catalysts, comparing the catalytic effect of combined mono-metallic catalysts (Cu/zeolite and Ni/zeolite) and sole bi-metallic catalyst (CuNi/zeolite) on the composition of bio-oil and pyrolytic gases...
January 18, 2019: Bioresource Technology
https://read.qxmd.com/read/30711820/simultaneous-cr-vi-reduction-and-electricity-generation-in-plant-sediment-microbial-fuel-cells-p-smfcs-synthesis-of-non-bonding-co-3-o-4-nanowires-onto-cathodes
#8
Ce Cheng, Yongyou Hu, Sicheng Shao, Jiayuan Yu, Weijia Zhou, Jianhua Cheng, Yuancai Chen, Shengnan Chen, Junfeng Chen, Lihua Zhang
Development of low-cost cathode materials for Plant-Sediment Microbial Fuel Cells (P-SMFCs) has gained increasing interest, due to improved performance levels in terms of power and pollutant removal. A novel low cost three-dimensional cathode prepared by simple three-step strategy with growth of Co3 O4 in-situ biofilm was successfully prepared. Different cathodes were applied to the six parallel P-SMFCs systems (reactor: R1-R6), such as graphite felt (GF), Pt/C, GF@Co3 O4 (non-bonding Co3 O4 nanowires on GF), GF@SG-Co3 O4 (using argon as shielding gas (SG))...
January 25, 2019: Environmental Pollution
https://read.qxmd.com/read/30691053/steam-reforming-of-model-bio-oil-aqueous-fraction-using-ni-cu-co-cr-sba-15-catalysts
#9
José A Calles, Alicia Carrero, Arturo J Vizcaíno, Lourdes García-Moreno, Pedro J Megía
Hydrogen obtained from biomass derivatives is considered a promising alternative to fossil fuels. The aim of this work is to test the viability of Ni-M/SBA-15 (M: Co, Cu, Cr) catalysts for the hydrogen production from bio-oil aqueous fraction reforming. Tests were performed in a fixed-bed reactor at 600 °C and atmospheric pressure. Firstly, the steam reforming (SR) of acetic acid, hydroxyacetone, furfural and phenol, as representative constituents of the bio-oil aqueous fraction, was carried out. Lower reactivity with increasing carbon number and decreasing steam-to-carbon ratio was observed...
January 25, 2019: International Journal of Molecular Sciences
https://read.qxmd.com/read/30685133/overview-of-the-recent-advances-in-lignocellulose-liquefaction-for-producing-biofuels-bio-based-materials-and-chemicals
#10
REVIEW
Jae-Young Kim, Hyung Won Lee, Soo Min Lee, Jungho Jae, Young-Kwon Park
The concerns over the increasing energy demand and cost as well as environmental problems derived from fossil fuel use are the main driving forces of research into renewable energy. Lignocellulosic biomass comprised of cellulose, hemicellulose, and lignin is an abundant, carbon neutral, and alternative resource for replacing fossil fuels in the future. Solvent liquefaction of lignocellulosic biomass is a promising route to obtain biofuels, bio-based materials, and chemicals using a range of solvents as reaction media under moderate reaction conditions...
January 15, 2019: Bioresource Technology
https://read.qxmd.com/read/30678297/medium-chain-carboxylic-acids-from-complex-organic-feedstocks-by-mixed-culture-fermentation
#11
REVIEW
Vicky De Groof, Marta Coma, Tom Arnot, David J Leak, Ana B Lanham
Environmental pressures caused by population growth and consumerism require the development of resource recovery from waste, hence a circular economy approach. The production of chemicals and fuels from organic waste using mixed microbial cultures (MMC) has become promising. MMC use the synergy of bio-catalytic activities from different microorganisms to transform complex organic feedstock, such as by-products from food production and food waste. In the absence of oxygen, the feedstock can be converted into biogas through the established anaerobic digestion (AD) approach...
January 22, 2019: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://read.qxmd.com/read/30665653/enhanced-nitrate-reduction-in-water-by-a-combined-bio-electrochemical-system-of-microbial-fuel-cells-and-submerged-aquatic-plant-ceratophyllum-demersum
#12
Peng Xu, Enrong Xiao, Junmei Wu, Feng He, Yi Zhang, Zhenbin Wu
High nitrate (NO3 - ) loading in water bodies is a crucial factor inducing the eutrophication of lakes. We tried to enhance NO3 - reduction in overlying water by coupling sediment microbial fuel cells (SMFCs) with submerged aquatic plant Ceratophyllum demersum. A comparative study was conducted by setting four treatments: open-circuit SMFC (Control), closed-circuit SMFC (SMFC-c), open-circuit SMFC with C. demersum (Plant), and closed-circuit SMFC with C. demersum (P-SMFC-c). The electrochemical parameters were documented to illustrate the bio-electrochemical characteristics of SMFC-c and P-SMFC-c...
April 2019: Journal of Environmental Sciences (China)
https://read.qxmd.com/read/30665087/using-a-hybrid-like-supported-catalyst-to-improve-green-fuel-production-through-hydrothermal-liquefaction-of-scenedesmus-obliquus-microalgae
#13
Komeil Kohansal, Ahmad Tavasoli, Ali Bozorg
Hydrothermal liquefaction of Scenedesmus obliquus has been optimized in a micro reactor using response surface methodology. Temperature, residence time and feedstock concentration were studied through central composite design to verify the optimized conditions leading to the highest yield of bio-crude and energy recovery. Based on the non-catalytic studies, temperature, feedstock concentration, and their interaction were respectively determined as the most effective variables. In order to improve the quality of produced bio-crude, the one step upgrading procedure was carried out in the presence of synthesized heterogeneous catalysts including Ni/AC, Ni/AC-CeO2 nanorods and Ni/CeO2 nanorods...
December 24, 2018: Bioresource Technology
https://read.qxmd.com/read/30648769/chemoenzymatic-hydrogen-production-from-methanol-through-the-interplay-of-metal-complexes-and-biocatalysts
#14
Ghazal Tavakoli, Jessica E Armstrong, Janne Naapuri, Jan Deska, Martin H G Prechtl
Microbial methylotrophic organisms can serve as great inspiration in the development of biomimetic strategies for the dehydrogenative conversion of C1 molecules at ambient conditions. In this concept article, we give a concise personal perspective on the recent advancement in the field of biomimetic catalytic models for methanol and formaldehyde conversions, in presence and absence of enzymes and co-factors, towards the formation of hydrogen at ambient conditions. In particular, formaldehyde dehydrogenase mimics have been introduced in standalone C1-interconversion networks...
January 16, 2019: Chemistry: a European Journal
https://read.qxmd.com/read/30648562/the-current-application-of-nanotechnology-in-food-and-agriculture
#15
REVIEW
Xiaojia He, Hua Deng, Huey-Min Hwang
The rapid development of nanotechnology has been facilitating the transformations of traditional food and agriculture sectors, particularly the invention of smart and active packaging, nanosensors, nanopesticides and nanofertilizers. Numerous novel nanomaterials have been developed for improving food quality and safety, crop growth, and monitoring environmental conditions. In this review the most recent trends in nanotechnology are discussed and the most challenging tasks and promising opportunities in the food and agriculture sectors from selected recent studies are addressed...
January 2019: Journal of Food and Drug Analysis
https://read.qxmd.com/read/30640090/mfc-based-biosensor-for-domestic-wastewater-cod-assessment-in-constructed-wetlands
#16
C Corbella, M Hartl, M Fernandez-Gatell, J Puigagut
In the context of natural-based wastewater treatment technologies (such as constructed wetlands - CW) the use of a low-cost, continuous-like biosensor tool for the assessment of operational conditions is of key importance for plant management optimization. The objective of the present study was to assess the potential use of constructed wetland microbial fuel cells (CW-MFC) as a domestic wastewater COD assessment tool. For the purpose of this work four lab-scale CW-MFCs were set up and fed with pre-settled domestic wastewater at different COD concentrations...
December 24, 2018: Science of the Total Environment
https://read.qxmd.com/read/30638225/bio-inspired-chitosan-heme-vitamin-b-12-derived-fe-co-bimetallic-doped-mesoporous-carbons-for-efficiently-electro-activating-oxygen
#17
Zifan Ma, Longdi Xu, Luyao Liu, Luyao Wang, Xiaoying Zhang, Aiguo Kong
A bio-inspired bimetallic Fe- and Co-doped nitrogen-carbon material (Fe-Co-N-C) was synthesized using chitosan and porphyrin-like heme and vitamin B12 precursors. Anionic heme with Fe-N4 moieties and vitamin B12 with Co-N4 moieties were grafted onto the surface of acidic chitosan polymers through interactions with cationic -NH3+, and these polymers were coated onto nano-sized silica spheres to form the composite precursors. The optimised thermolysis of these composites yielded mesoporous carbons with abundant surface Fe-Nx and Co-Nx sites...
January 14, 2019: Dalton Transactions: An International Journal of Inorganic Chemistry
https://read.qxmd.com/read/30634651/functionalized-periodic-mesoporous-organosilicas-tunable-hydrophobic-solid-acids-for-biomass-conversion
#18
REVIEW
Jinesh C Manayil, Adam F Lee, Karen Wilson
The catalytic deoxygenation of bio-based feedstocks to fuels and chemicals presents new challenges to the catalytic scientist, with many transformations either performed in or liberating water as a byproduct during reaction. The design of catalysts with tunable hydrophobicity to aid product and reactant adsorption or desorption, respectively, is vital for processes including (trans)esterification and condensation reactions employed in sustainable biodiesel production and bio-oil upgrading processes. Increasing surface hydrophobicity of catalyst materials offers a means to displace water from the catalyst active site, and minimizes potential deactivation or hydrolysis side reactions...
January 10, 2019: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://read.qxmd.com/read/30627994/factors-affecting-germany-s-green-development-over-1990-2015-a-comprehensive-environmental-analysis
#19
Hasan Rüstemoğlu
This study was aimed at providing a comprehensive environmental analysis of Germany from 1990 to 2015. First, an ecological footprint analysis of the country was conducted using bio-capacity and ecological footprint data. Second, possible decoupling of the country's economic growth and carbon dioxide (CO2 ) emissions was examined using the decoupling factor adopted by the Organization for Economic Co-operation and Development (OECD). Third, the factors affecting aggregated and sector (electricity and heat production) emission changes were identified using the Logarithmic Mean Divisia Index (LMDI) method...
January 9, 2019: Environmental Science and Pollution Research International
https://read.qxmd.com/read/30622643/sequential-fractionation-of-the-lignocellulosic-components-in-hardwood-based-on-steam-explosion-and-hydrotropic-extraction
#20
Johanna Olsson, Vera Novy, Fredrik Nielsen, Ola Wallberg, Mats Galbe
Background: The forest biorefinery plays an important part in the evolving circular bioeconomy due to its capacity to produce a portfolio of bio-based and sustainable fuels, chemicals, and materials. To tap into its true potential, more efficient and environmentally benign methods are needed to fractionate woody biomass into its main components (cellulose, hemicellulose, and lignin) without reducing their potential for valorization. This work presents a sequential fractionation method for hardwood based on steam pretreatment (STEX) and hydrotropic extraction (HEX) with sodium xylene sulfonate...
2019: Biotechnology for Biofuels
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