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https://www.readbyqxmd.com/read/30105200/one-step-electrochemically-synthesized-graphene-oxide-coated-on-polypyrrole-nanowires-as-anode-for-microbial-fuel-cell
#1
Xuehua Li, Jiansheng Qian, Xingge Guo, Liwei Shi
A novel polypyrrole nanowires coated by graphene oxide (PPy-NWs/GO) has been successfully synthesized by one-step electrochemical method, whose structure was different from previously reported PPy/GO composites. The microbial fuel cell equipped with PPy-NWs/GO as anode was fabricated and compared with PPy-NWs ones. The SEM images show that the synthesized PPy-NWs/GO materials possess more surface areas than PPy-NWs. The electrochemical analysis indicated that PPy-NWs/GO anode had lower charge transfer resistance, which may be attributed to synergistic effect of them...
August 2018: 3 Biotech
https://www.readbyqxmd.com/read/30103159/composite-polymer-coated-magnetic-nanoparticles-based-anode-enhances-dye-degradation-and-power-production-in-microbial-fuel-cells
#2
Mrinal Kumar Sarma, Mohd Golam Abdul Quadir, Rupam Bhaduri, Sharbani Kaushik, Pranab Goswami
Combined power generation and waste degradation through microbial fuel cell (MFC) technology is emerging as an attractive solution for controlling pollution in water bodies. Cyanobacteria as fuel cell catalysts for such shared energy activities are not well studied even though these possess robust metabolic systems supporting exo-electrogenicity, biodegradation of toxic compounds, and their survival under wide environmental conditions. Herein, a dual chambered (50 ml each) MFC assembled with Synechococcus sp...
July 31, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/30103156/quick-start-up-and-performance-of-microbial-fuel-cell-enhanced-with-a-polydiallyldimethylammonium-chloride-modified-carbon-felt-anode
#3
Dengjie Zhong, Xinrong Liao, Yaqi Liu, Nianbing Zhong, Yunlan Xu
It is of significant importance to simultaneously shorten the start-up time and enhance the electricity generation performance for practical application of microbial fuel cell (MFC). In this paper, the polydiallyldimethylammonium chloride (PDDA) modified carbon felt (PDDA-CF) electrode was prepared and used as the anode of PDDA-MFC. The anode significantly enhanced the start-up speed and electricity generation and dye wastewater degradation performances of the PDDA-MFC. The start-up time of PDDA-MFC is only 9 h, which is only 7...
August 1, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/30103124/review-of-global-sanitation-development
#4
REVIEW
Xiaoqin Zhou, Zifu Li, Tianlong Zheng, Yichang Yan, Pengyu Li, Emmanuel Alepu Odey, Heinz Peter Mang, Sayed Mohammad Nazim Uddin
The implementation of the United Nations (UN) Millennium Development Goals (MDGs) and Sustainable Development Goals (SDGs) has resulted in an increased focus on developing innovative, sustainable sanitation techniques to address the demand for adequate and equitable sanitation in low-income areas. We examined the background, current situation, challenges, and perspectives of global sanitation. We used bibliometric analysis and word cluster analysis to evaluate sanitation research from 1992 to 2016 based on the Science Citation Index EXPANDED (SCI-EXPANDED) and Social Sciences Citation Index (SSCI) databases...
August 10, 2018: Environment International
https://www.readbyqxmd.com/read/30101765/biological-fuel-cells-produce-bioelectricity-with-in-situ-brackish-water-purification
#5
Simone Perazzoli, Renan B Bastos, Fabrício B Santana, Hugo M Soares
Biological fuel cells, namely microbial desalination cells (MDCs) are a promising alternative to traditional desalination technologies, as microorganisms can convert the energy stored in wastewater directly into electricity and utilize it in situ to drive desalination, producing a high-quality reuse water. However, there are several challenges to be overcome in order to scale up from laboratory research. This study was conducted in order to better understand the performance of MDCs inoculated with marine sediments during the treatment of brackish water (5...
August 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/30098490/impact-of-electrode-micro-and-nano-scale-topography-on-the-formation-and-performance-of-microbial-electrodes
#6
REVIEW
Pierre Champigneux, Marie-Line Delia, Alain Bergel
From a fundamental standpoint, microbial electrochemistry is unravelling a thrilling link between life and materials. Technically, it may be the source of a large number of new processes such as microbial fuel cells for powering remote sensors, autonomous sensors, microbial electrolysers and equipment for effluent treatment. Microbial electron transfers are also involved in many natural processes such as biocorrosion. In this context, a huge number of studies have dealt with the impact of electrode materials, coatings and surface functionalizations but very few have focused on the effect of the surface topography, although it has often been pointed out as a key parameter impacting the performance of electroactive biofilms...
July 11, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/30097358/enhanced-rhodococcus-pyridinivorans-hr-1-anode-performance-by-adding-trehalose-lipid-in-microbial-fuel-cell
#7
Peng Cheng, Rui Shan, Hao-Ran Yuan, Li-Fang Deng, Yong Chen
In this study, a trehalose lipid was added to a Rhodococcus pyridinivorans-inoculated MFC to improve the power output by enhancing electron transfer. Upon trehalose lipid additions of different concentrate from 0 to 20 mg/L, the maximum power density increased from 54.7 mW/m2 to 324.4 mW/m2 (5.93 times) while the corresponding current density was 3.66 times increased from 0.35 A/m2 to 1.28 A/m2 . Cyclic voltammetry analysis revealed that the addition of trehalose lipid increased the electron transfer performance, while electrochemical impedance spectroscopy results proved a decrease in internal resistance...
August 4, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30096734/boosted-activity-of-graphene-encapsulated-cofe-alloys-by-blending-with-activated-carbon-for-oxygen-reduction-reaction
#8
Cuicui Lv, Bolong Liang, Kexun Li, Yong Zhao, Hongwen Sun
The slow oxygen reduction reaction (ORR) hampers the efficiency of microbial fuel cells (MFCs) to a large extent, which usually requires catalysts to facilitate the electron transfer. The major challenge of the existed non-precious metals in place of the noble metal catalysts (Pt, Pd, Au et al.) for ORR is their low efficiency, which urgently needs special route to tackle this issue. Herein, we report a simple and convenient technique using prussian blue analogues as precursor to directly synthesize the N-doped graphene encapsulated CoFe alloy which is present in "Core-Shell" structure via calcination of Co2 Fe(CN)6 in inert condition...
October 15, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/30092551/optimization-of-co-culture-inoculated-microbial-fuel-cell-performance-using-response-surface-methodology
#9
M Amirul Islam, Huei Ruey Ong, Baranitharan Ethiraj, Chin Kui Cheng, Md Maksudur Rahman Khan
Microbial fuel cells (MFCs) are considered as promising technology to achieve simultaneous wastewater treatment and electricity generation. However, operational and technological developments are still required to make it as a sustainable technology. In the present study, response surface methodology (RSM) was used to evaluate the effects of substrate concentration, co-culture composition, pH and time on the performance of co-culture (Klebsiella variicola and Pseudomonas aeruginosa) inoculated double chamber MFC...
August 6, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/30091091/discovery-and-application-of-stress-responsive-srnas-in-cyanobacteria
#10
Tao Sun, Guangsheng Pei, Xinyu Song, Lei Chen, Weiwen Zhang
Bacterial small regulatory RNAs (sRNAs) are noncoding molecules with a typical length of 50-300 nt. In recent years, sRNAs have drawn notable attention due to their participation in various bacterial biological processes, such as plasmid control, viral replication, bacterial virulence, and quorum sensing. In addition, there has been a gradual realization that sRNAs play important roles in the response to various stress perturbations. Gram-negative cyanobacteria are autotrophic prokaryotes that perform oxygenic photosynthesis, which makes them promising renewable chassis for the production of green fuels and chemicals as an alternative to the traditional biomass-based "microbial cell factory...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/30077174/micro-oxygen-bioanode-an-efficient-strategy-for-enhancement-of-phenol-degradation-and-current-generation-in-mix-cultured-mfcs
#11
Li-Hui Yang, Ting-Ting Zhu, Wei-Wei Cai, Muhammad Rizwan Haider, Hong-Cheng Wang, Hao-Yi Cheng, Ai-Jie Wang
It is controversial to introduce oxygen into anode chamber as oxygen would decrease the CE (Coulombic efficiency) while it could also enhance the degradation of aromatics in microbial fuel cell (MFCs). Therefore, it is important to balance the pros and cons of oxygen in aromatics driven MFCs. A RMO (micro-oxygen bioanode MFC) was designed to determine the effect of oxygen on electricity output and phenol degradation. The RMO showed 6-fold higher phenol removal efficiency, 4-fold higher current generation than the RAN (anaerobic bioanode MFC) at a cost of 26...
July 7, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30077167/monitoring-of-neomycin-sulfate-antibiotic-in-microbial-fuel-cells
#12
Tunc Catal, Sehnaz Yavaser, Vildan Enisoglu-Atalay, Hakan Bermek, Selma Ozilhan
Indirect detection and quantification of the neomycin sulfate antibiotic was accomplished in microbial fuel cells. Performance of the microbial fuel cells was examined on the basis of the following parameters; voltage generation, power density, current density and coulombic efficiencies. Removal of neomycin sulfate was monitored using LC-MS/MS in parallel with chemical oxygen demand and total carbohydrate removal. While neomycin sulfate was partially degraded, microbial fuel cell performance appeared to be affected and eventually inhibited by neomycin sulfate on a concentration-based fashion...
July 26, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30072494/thermodynamic-and-functional-characterization-of-the-periplasmic-triheme-cytochrome-ppca-from-geobacter-metallireducens
#13
Tomás M Fernandes, Leonor Morgado, Carlos A Salgueiro
The Geobacter metallireducens bacterium can couple the oxidation of a wide range of compounds to the reduction of several extracellular electron acceptors, including pollutants or electrode surfaces for current production in microbial fuel cells. For these reasons, G. metallireducens are of interest for practical biotechnological applications. The use of such electron acceptors relies on a mechanism that permits electrons to be transferred to the cell exterior. The cytochrome PpcA from G. metallireducens is a member of a family composed by five periplasmic triheme cytochromes, which are important to bridge the electron transfer from the cytoplasmic donors to the extracellular acceptors...
August 2, 2018: Biochemical Journal
https://www.readbyqxmd.com/read/30061933/electron-carriers-increase-electricity-production-in-methane-microbial-fuel-cells-that-reverse-methanogenesis
#14
Ryota Yamasaki, Toshinari Maeda, Thomas K Wood
Background: We previously reversed methanogenesis in microbial fuel cells (MFCs) to produce electricity for the first time from methane by combining an engineered archaeal strain that produces methyl-coenzyme M reductase from unculturable anaerobic methanotrophs (to capture methane and secrete acetate) with Geobacter sulfurreducens (to produce electrons from the generated acetate) and methane-acclimated sludge (to provide electron shuttles). Results: Here, the power density in MFCs was increased 77-fold to 5216 mW/m2 and the current density in MFCs was increased 73-fold to 7...
2018: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/30060410/cylindrical-graphite-based-microbial-fuel-cell-for-the-treatment-of-industrial-wastewaters-and-bioenergy-generation
#15
Gunda Mohanakrishna, Ibrahim M Abu-Reesh, Riyadh I Al-Raoush, Zhen He
Cylindrical graphite microbial fuel cell (MFC) configuration designed by eliminating distinct casing and membrane was evaluated for bioelectrogenesis and treatment of real-field wastewaters. Both petroleum refinery wastewater (PRW) and Labanah whey wastewater (LW) were used as substrates, and investigated for electricity generation and organic removal under batch mode operation. PRW showed higher bioelectricity generation (current and power generation of 3.35mA and 1.12mW at 100Ω) compared to LW (3.2mA and 1...
January 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30060400/hydrogen-peroxide-generation-in-microbial-fuel-cells-using-graphene-based-air-cathodes
#16
Heng Dong, Xiaowan Liu, Ting Xu, Qiuying Wang, Xianghao Chen, Shuning Chen, Helan Zhang, Peng Liang, Xia Huang, Xiaoyuan Zhang
Utilization of two-electron oxygen reduction reaction (ORR) in bioelectrochemical systems (BES) is a novel way to generate H2 O2 from wastewater, and cathode catalyst is a key factor affecting ORR performance. Here, the catalytic performance of plain graphene, oxidized graphene and graphene oxide (GO) in microbial fuel cells (MFCs) and the influence of oxygen-containing functional groups are reported. Oxidized graphene air-cathode had 78% and 131% higher H2 O2 productions than plain graphene cathode respectively in an abiotic reactor and an MFC...
January 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30050901/textile-dye-decolorizing-synechococcus-pcc7942-engineered-with-cota-laccase
#17
Yuanmei Liang, Juan Hou, Ying Liu, Yifan Luo, Jie Tang, Jay J Cheng, Maurycy Daroch
Cyanobacteria are prokaryotic phototrophs capable of achieving high cellular densities with minimal inputs. These prokaryotic organisms can grow using sunlight as energy source and carbon dioxide as carbon source what makes them promising candidates as microbial cell factories for the production of numerous compounds such as chemicals, fuels, or biocatalysts. In this study, we have successfully designed and constructed using synthetic biology approach two recombinant strains of Synechococcus elongatus PCC7942 for heterologous expression of the industrially relevant Bacillus subtilis CotA laccase...
2018: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/30048624/thermodynamic-and-kinetic-properties-of-the-outer-membrane-cytochrome-omcf-a-key-protein-for-extracellular-electron-transfer-in-geobacter-sulfurreducens
#18
Liliana R Teixeira, Joana M Dantas, Carlos A Salgueiro, Cristina M Cordas
Gene knock-out studies on Geobacter sulfurreducens have shown that the monoheme c-type cytochrome OmcF is essential for the extracellular electron transfer pathways involved in the reduction of iron and uranium oxy-hydroxides, as well as, on electricity production in microbial fuel cells. A detailed electrochemical characterization of OmcF was performed for the first time, allowing attaining kinetics and thermodynamic data. The heterogeneous electron transfer rate constant was determined at pH 7 (0.16 ± 0...
July 24, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/30046898/biodegradation-of-surrogate-naphthenic-acids-and-electricity-generation-in-microbial-fuel-cells-bioelectrochemical-and-microbial-characterizations
#19
Guadalupe Montserrat Valdes Labrada, Mehdi Nemati
Waters contaminated with naphthenic acids (NAs) and associated tailings are one of the major environmental challenges associated with the processing of oil sands and production of heavy oil. In the current work biodegradation of linear and cyclic naphthenic acids, namely octanoic acid and 4-methyl-1-cyclohexane carboxylic acid (trans-4MCHCA), individually and in mixture were evaluated in microbial fuel cells (MFCs). In batch MFCs with single rod electrodes and freely suspended bacteria, biodegradation rate increased as NA initial concentration increased from 100 to 250 mg L-1 with no further improvement when a concentration of 500 mg L-1 was evaluated...
July 25, 2018: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/30037411/relationship-between-electrogenic-performance-and-physiological-change-of-four-wetland-plants-in-constructed-wetland-microbial-fuel-cells-during-non-growing-seasons
#20
Yin Zhou, Dong Xu, Enrong Xiao, Dan Xu, Peng Xu, Xia Zhang, Qiaohong Zhou, Feng He, Zhenbin Wu
To find suitable wetland plants for constructed wetland-microbial fuel cells (CW-MFCs), four commonly used wetland plants, including Canna indica, Cyperus alternifolius L., Acorus calamus, and Arundo donax, were investigated for their electrogenic performance and physiological changes during non-growing seasons. The maximum power output of 12.82mW/m2 was achieved in the A. donax CW-MFC only when root exudates were being released. The results also showed that use of an additional carbon source could remarkably improve the performance of electricity generation in the C...
August 2018: Journal of Environmental Sciences (China)
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