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bio-fuel cell

Pranab Jyoti Sarma, Kaustubha Mohanty
In this study, two different unexploited indoor plants, Epipremnum aureum and Dracaena braunii were used to produce clean and sustainable bio-electricity in a plant microbial fuel cell (PMFC). Acid modified carbon fiber brush electrodes as well as bare electrodes were used in both the PMFCs. A bentonite based clay membrane was successfully integrated in the PMFCs. Maximum performance of E. aureum was 620 mV which was 188 mV higher potential than D. braunii. The bio-electricity generation using modified electrode was 154 mV higher than the bare carbon fiber, probably due to the effective bacterial attachment to the carbon fiber owing to hydrogen bonding...
April 13, 2018: Journal of Bioscience and Bioengineering
Christopher E Bagwell, Peter A Noble, Charles E Milliken, Dien Li, Daniel I Kaplan
Water quality is an important determinant for the structural integrity of alloy cladded fuels and assemblies during long-term wet storage. Detailed characterization of a water filled storage basin for spent nuclear reactor fuel was performed following the formation and proliferation of an amorphous white flocculent. White precipitant was sampled throughout the storage basin for chemical and spectroscopic characterization, and environmental DNA was extracted for 454 pyrosequencing of bacterial 16S rRNA gene diversity...
2018: Frontiers in Microbiology
DongHyun Ryu, Yong Jae Kim, Seon Il Kim, Hyeonaug Hong, Hyun S Ahn, Kyunghoon Kim, WonHyoung Ryu
Photosynthesis converts solar energy to electricity in a highly efficient manner. Since only water is needed as fuel for energy conversion, this highly efficient energy conversion process has been rigorously investigated. In particular, photosynthetic apparatus, such as photosystem II (PSII), photosystem I (PSI), or thylakoids, have been isolated from various plants to construct bio-hybrid anodes. Although PSII or PSI decorated anodes have shown potentials, there still remain challenges, such as poor stability of PSII-based systems or need for electron donors other than water molecules of PSI-based systems...
March 25, 2018: Nanomaterials
Xiaoshuai Wu, Yan Qiao, Zhuanzhuan Shi, Wei Tang, Chang Ming Li
Interfacial electron transfer between electroactive biofilm and the electrode is crucial step for microbial fuel cells (MFCs) and other bioelectrochemical systems. Here, a hierarchically porous nitrogen-doped CNTs/reduced graphene oxide (rGO) composite with polyaniline as nitrogen source has been developed for MFCs anode. This composite possesses nitrogen atoms doped surface for improved flavin redox reaction and a three-dimensional (3D) hierarchically porous structure for rich bacterial biofilm growth. The N-CNTs/rGO anode delivers a maximum power density of 1137 mW m-2 in Shewanella putrefaciens CN32 microbial fuel cells, which is 8...
March 20, 2018: ACS Applied Materials & Interfaces
Jay K Bhattarai, Dharmendra Neupane, Bishal Nepal, Vasilii Mikhaylov, Alexei V Demchenko, Keith J Stine
Nanoporous gold (np-Au), because of its high surface area-to-volume ratio, excellent conductivity, chemical inertness, physical stability, biocompatibility, easily tunable pores, and plasmonic properties, has attracted much interested in the field of nanotechnology. It has promising applications in the fields of catalysis, bio/chemical sensing, drug delivery, biomolecules separation and purification, fuel cell development, surface-chemistry-driven actuation, and supercapacitor design. Many chemical and electrochemical procedures are known for the preparation of np-Au...
March 16, 2018: Nanomaterials
N Shaari, S K Kamarudin, S Basri, L K Shyuan, M S Masdar, D Nordin
The high methanol crossover and high cost of Nafion® membrane are the major challenges for direct methanol fuel cell application. With the aim of solving these problems, a non-Nafion polymer electrolyte membrane with low methanol permeability and high proton conductivity based on the sodium alginate (SA) polymer as the matrix and sulfonated graphene oxide (SGO) as an inorganic filler (0.02-0.2 wt%) was prepared by a simple solution casting technique. The strong electrostatic attraction between -SO3 H of SGO and the sodium alginate polymer increased the mechanical stability, optimized the water absorption and thus inhibited the methanol crossover in the membrane...
March 13, 2018: Nanoscale Research Letters
Ivo Bardarov, Mario Mitov, Desislava Ivanova, Yolina Hubenova
In this study, we explored in details the influence of the light irradiation on the SMFCs electrical outputs. The experiments at both natural and artificial illumination firmly show that during the photoperiods the current grows up. The intensity of the current increase depends on the duration of the photoperiod as well as on the wavelength of the monochromatic light source applied. The highest influence of the light irradiation has been obtained at wavelengths, corresponding to the absorption peaks of essential pigments in the light-harvesting system of oxygenic photosynthesizing microorganisms...
February 27, 2018: Bioelectrochemistry
I Sharma, M M Ghangrekar
An appropriate current collector (CC) is crucial for harvesting substantial power in a microbial fuel cell (MFC). In the present study, stainless steel (SS) and titanium wires were used as the CCs for both the anode and cathode of MFC-1 and MFC-2, respectively. Tungsten wire (TW) was used as the anode CC in MFC-3, with SS wire as the cathode CC. In MFC-4, TW was used as the cathode CC with SS wire as the anode CC, and in MFC-5 both electrode CCs were TW. The power density, current density, oxidation current and bio-capacitance were compared to select the best and most cost effective CC material to enhance the power output of MFCs...
February 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Feng Li, Yuanxiu Li, Li-Ming Sun, Xiaoli Chen, Xingjuan An, Changji Yin, Yingxiu Cao, Hui Wu, Hao Song
Efficient extracellular electron transfer (EET) of exoelectrogens is essentially for practical applications of versatile bio-electrochemical systems. Intracellular electrons flow from NADH to extracellular electron accepters via EET pathways. However, it was yet established how the manipulation of intracellular NADH impacted the EET efficiency. Strengthening NADH regeneration from NAD + , as a feasible approach for cofactor engineering, has been used in regulating the intracellular NADH pool and the redox state (NADH/NAD + ratio) of cells...
February 11, 2018: ACS Synthetic Biology
Orr Schlesinger, Rambabu Dandela, Ashok Bhagat, Michael M Meijler, Lin Xia, Lital Alfonta
Regulation of Biosystems in a clean, simple and efficient way is important for the design of smart bio-interfaces and bioelecronic devices. Light as a non-invasive mean to control the activity of a protein enables spatial and temporal control far superior to other chemical and physical methods. The ability to regulate the activity of a catalytic enzyme in a biofuel-cell reduces the waste of resources and energy and turns the fuel-cell into a smart and more efficient device for power generation. Here we present a microbial-fuel-cell based on a surface displayed, photo-switchable alcohol dehydrogenase...
February 7, 2018: Biotechnology and Bioengineering
Ramesh Karunagaran, Campbell Coghlan, Cameron Shearer, Diana Tran, Karan Gulati, Tran Thanh Tung, Christian Doonan, Dusan Losic
Rapid depletion of fossil fuel and increased energy demand has initiated a need for an alternative energy source to cater for the growing energy demand. Fuel cells are an enabling technology for the conversion of sustainable energy carriers (e.g., renewable hydrogen or bio-gas) into electrical power and heat. However, the hazardous raw materials and complicated experimental procedures used to produce electro-catalysts for the oxygen reduction reaction (ORR) in fuel cells has been a concern for the effective implementation of these catalysts...
January 28, 2018: Materials
Carlos A Flores-Gómez, Eleazar M Escamilla Silva, Cheng Zhong, Bruce E Dale, Leonardo da Costa Sousa, Venkatesh Balan
Background: Agave-based alcoholic beverage companies generate thousands of tons of solid residues per year in Mexico. These agave residues might be used for biofuel production due to their abundance and favorable sustainability characteristics. In this work, agave leaf and bagasse residues from species Agave tequilana and Agave salmiana were subjected to pretreatment using the ammonia fiber expansion (AFEX) process. The pretreatment conditions were optimized using a response surface design methodology...
2018: Biotechnology for Biofuels
Raphael Ferreira, Paulo Gonçalves Teixeira, Verena Siewers, Jens Nielsen
Bio-based production of fatty acids and fatty acid-derived products can enable sustainable substitution of petroleum-derived fuels and chemicals. However, developing new microbial cell factories for producing high levels of fatty acids requires extensive engineering of lipid metabolism, a complex and tightly regulated metabolic network. Here we generated a Saccharomyces cerevisiae platform strain with a simplified lipid metabolism network with high-level production of free fatty acids (FFAs) due to redirected fatty acid metabolism and reduced feedback regulation...
February 6, 2018: Proceedings of the National Academy of Sciences of the United States of America
Takahiro Arakawa, Rui Xie, Fumiya Seshima, Koji Toma, Kohji Mitsubayashi
Powering future generations of medical and health care devices mandates the transcutaneous transfer of energy or harvesting energy from the human body fluid. Glucose-driven bio fuel cells (bio-batteries) demonstrate promise as they produce electrical energy from glucose, which is a substrate presents in physiological fluids. Enzymatic biofuel cells can convert chemical energy into electrical energy using enzymes as catalysts. In this study, an air bio-battery was developed for healthcare and medical applications, consisting of a glucose-driven enzymatic biofuel cell using a direct gas-permeable membrane or a gas/liquid porous diaphragm...
April 30, 2018: Biosensors & Bioelectronics
He Zhang, You Yu, Lingling Zhang, Shaojun Dong
A bio-photoelectrochemical cell (BPEC) based on a fuel-free self-circulation water-oxygen-water system was fabricated. It consists of Ni:FeOOH modified n-type bismuth vanadate (BiVO4 ) photoanode and laccase catalyzed biocathode. In this BPEC, irradiation of the photoanode generates photocurrent for photo-oxidation of water to oxygen, which is reduced to water again at the laccase biocathode. Of note, the by-products of two electrode reactions could continue to be reacted, which means the H2 O and O2 molecules are retained in an infinite loop of water-oxygen-water without any sacrificial chemical components...
February 5, 2018: Angewandte Chemie
Carmalin Sophia Ayyappan, V M Bhalambaal, Sunil Kumar
The effect of coconut shell biochar on dye degradation in a microbial fuel cell (MFC) was investigated in the present study. Two different doses of biochar (0.5 g and 1 g) and one control without bio-char were studied. The highest COD removal efficiency was about 77.7% (0.5 g biochar), maximum current (1.07 mA) and voltage (722 mV) were obtained with 1 g biochar. Biofilm optical microscopy characterization revealed the micro colonies intricate plate-like structures. High adsorbent dosage might provide a high surface area for biofilm to generate electricity...
March 2018: Bioresource Technology
B Neethu, M M Ghangrekar
Sediment microbial fuel cells (SMFCs) are bio-electrochemical devices generating electricity from redox gradients occurring across the sediment-water interface. Sediment microbial carbon-capture cell (SMCC), a modified SMFC, uses algae grown in the overlying water of sediment and is considered as a promising system for power generation along with algal cultivation. In this study, the performance of SMCC and SMFC was evaluated in terms of power generation, dissolved oxygen variations, sediment organic matter removal and algal growth...
December 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Karen P Briski, Hussain N Alhamami, Ayed Alshamrani, Santosh K Mandal, Manita Shakya, Mostafa H H Ibrahim
Vital nerve cell functions, including maintenance of transmembrane voltage and information transfer, occur at high energy expense. Inadequate provision of the obligate metabolic fuel glucose exposes neurons to risk of dysfunction or injury. Clinical hypoglycemia rarely occurs in nondiabetic individuals but is an unfortunate regular occurrence in patients with type 1 or advanced insulin-treated type 2 diabetes mellitus. Requisite strict glycemic control, involving treatment with insulin, sulfonylureas, or glinides, can cause frequent episodes of iatrogenic hypoglycemia due to defective counter-regulation, including reduced glycemic thresholds and diminished magnitude of motor responses...
2017: Advances in Experimental Medicine and Biology
Lu Wang, Yulei Liu, Chao Wang, Xiaodan Zhao, Gurumurthy Dummi Mahadeva, Yicheng Wu, Jun Ma, Feng Zhao
Triclosan (TCS) is an emerging organic contaminant in the environment. Here, the anoxic bio-degradation of TCS in microbial fuel cells (MFCs) was explored. It was found that anoxic biodegradation of TCS could be achieved in MFC, and the removal rate of TCS was accelerated after reactor acclimation. After 7 months of operation, 10mg/L TCS could be removed within 8days in MFCs. Fluorescence microscopy results revealed that the microbe cells in the reactors were intact, and the microbes were in active state. Flow cytometry test showed that the proliferation of inoculated microbe was higher in MFC effluent than that in TCS solution...
February 15, 2018: Journal of Hazardous Materials
Wulin Yang, Ruggero Rossi, Yushi Tian, Kyoung-Yeol Kim, Bruce E Logan
Microbial fuel cell (MFC) cathodes rapidly foul when treating domestic wastewater, substantially reducing power production over time. Here a wipe separator was chemically bonded to an activated carbon air cathode using polyvinylidene fluoride (PVDF) to mitigate cathode fouling and extend cathode performance over time. MFCs with separator-bonded cathodes produced a maximum power density of 190 ± 30 mW m(-2) after 2 months of operation using domestic wastewater, which was ∼220% higher than controls (60 ± 50 mW m(-2)) with separators that were not chemically bonded to the cathode...
November 4, 2017: Bioresource Technology
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