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microbial fuel cell

Ankisha Vijay, Meenu Chhabra, Tessy Vincent
A comparison of autotrophic (AD) and heterotrophic (HD) cathodic denitrification in a Microbial Fuel Cell (MFC) was made in this study. Denitrifying microbial consortia were developed from cow manure and soil and acclimatized under AD and HD conditions. The AD MFC supported the power output of 4.45 W m-3 while removing nitrate nitrogen (NO3 - -N) at the rate of 0.118 kg NO3 - -N m-3  d-1 . Significant power output (3.02 W m-3 ) and nitrate removal rate (2.06 kg NO3 - -N m-3  d-1 ) were achieved in HD MFC...
October 12, 2018: Bioresource Technology
Adam W Westbrook, Dragan Miscevic, Shane Kilpatrick, Mark R Bruder, Murray Moo-Young, C Perry Chou
While the widespread reliance on fossil fuels is driven by their low cost and relative abundance, this fossil-based economy has been deemed unsustainable and, therefore, the adoption of sustainable and environmentally compatible energy sources is on the horizon. Biorefinery is an emerging approach that integrates metabolic engineering, synthetic biology, and systems biology principles for the development of whole-cell catalytic platforms for biomanufacturing. Due to the high degree of reduction and low cost, glycerol, either refined or crude, has been recognized as an ideal feedstock for the production of value-added biologicals, though microbial dissimilation of glycerol sometimes can be difficult particularly under anaerobic conditions...
October 16, 2018: Biotechnology Advances
Haixia Du, Jiangyang Guo, Yizhen Xu, Yanxia Wu, Fusheng Li, Huifang Wu
The effects of mixed feeding of boiled potato and waste activated sludge (WAS) on the performance of a microbial fuel cell (MFC) in treating solid potato waste were investigated. The coulombic efficiency (CE) of four MFCs fed with potato cubes containing 0, 48.7, 67.3 and 85.6% of boiled potato was 53.5, 70.5, 92.7 and 71.1%, respectively, indicating enhanced electricity generation and the existence of an optimum mixing ratio. The hydrolysis rate estimated using a first-order sequential hydrolysis model increased from 0...
October 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Gaofeng Ni, Sebastian Canizales, Elias Broman, Domenico Simone, Viraja R Palwai, Daniel Lundin, Margarita Lopez-Fernandez, Tom Sleutels, Mark Dopson
Thiocyanate is a toxic compound produced by the mining and metallurgy industries that needs to be remediated prior to its release into the environment. If the industry is situated at high altitudes or near the poles, economic factors require a low temperature treatment process. Microbial fuel cells are a developing technology that have the benefits of both removing such toxic compounds while recovering electrical energy. In this study, simultaneous thiocyanate degradation and electrical current generation was demonstrated and it was suggested that extracellular electron transfer to the anode occurred...
2018: Frontiers in Microbiology
Xu Song, Wulin Yang, Zheqian Lin, Liping Huang, Xie Quan
A loop of catholyte effluent feeding to the bioanodes of air-cathode microbial fuel cells (MFCs) achieved complete recovery of mixed Sn(II), Fe(II) and Cu(II), with simultaneous treatment of the co-present organics in synthetic wastewater of printed circuit boards (PrCBs). This in-situ utilization of caustic in the cathodes and the neutralization of acid in the anodes achieved superior metal recovery performance at an optimal hydraulic retention time (HRT) of 24 h. Cathode chambers primarily removed Sn of 91 ± 4% (bottom: 74 ± 3%; electrode: 17 ± 1%), Fe of 89 ± 8% (bottom: 64 ± 4%; electrode: 25 ± 2%), and Cu of 92 ± 7% (electrode: 63 ± 5%; bottom: 29 ± 1%), compared to Sn of 9 ± 3% (electrode: 7 ± 1%; bottom: 2 ± 1%), Fe of 9 ± 3% (electrode: 8 ± 3%; bottom: 1 ± 0%), and Cu of 7 ± 3% (electrode: 4 ± 1%; bottom: 3 ± 1%) in the bioanodes...
October 9, 2018: Science of the Total Environment
İpek Ergal, Werner Fuchs, Benedikt Hasibar, Barbara Thallinger, Günther Bochmann, Simon K-M R Rittmann
A CO2 -neutral energy production alternative compared to conventional fossil fuel utilization is biohydrogen (H2 ) production. Three basic mechanisms for microbial H2 production exist: photosynthetic H2 production, photo-fermentative H2 production, and dark fermentative H2 production (DFHP). Despite surmounting reports in literature on the characterization and optimization of DFHP systems, H2 production has not yet reached an industrial scale. Here, DFHP characteristics of pure culture of microorganisms from more than one century were reviewed and analysed...
October 11, 2018: Biotechnology Advances
Linfang Zhang, Guokai Fu, Zhi Zhang
Mustard tuber wastewater (MTWW) was used as both anolyte and catholyte in biocathode microbial fuel cell (BMFC). The results showed simultaneous nutrient and carbon removal and electricity generation were realized in BMFC. Excellent Chemical Oxygen Demand (COD) removal occurred in both anode (>90%) and cathode (>91%). Concerning nutrient removal, it was mainly removed in cathode. The maximum total phosphorus (TP) removal could reach 80.8 ± 1.0% by biological action. Simultaneous nitrification and denitrification (SND) was realized in cathode...
October 6, 2018: Bioresource Technology
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
Tamilarasan Karuppiah, Arulazhagan Pugazhendi, Sakthivel Subramanian, Mamdoh T Jamal, Rajesh Banu Jeyakumar
Single chamber air cathode microbial fuel cell (MFC) is a promising and sustainable technology to generate electricity. In the present study, the potential of air cathode MFC treating dye processing wastewater was investigated at various organic loads with interest focused on power densities, organic removal and coulombic efficiencies. The highest power density of about 515 mW/m2 (6.03 W/m3 ) with 56% of coulombic efficiency was procured at 1.0 (g COD/L) organic load. The high potency of TCOD (total chemical oxygen demand), SCOD (soluble chemical oxygen demand) and TSS (Total Suspended Solids) removal of about 85%, 73% and 68% respectively was achieved at the organic load of 1...
October 2018: 3 Biotech
Maria Sardi, Molly Krause, Justin Heilberger, Audrey P Gasch
Next generation biofuels including longer-chain alcohols such as butanol are attractive as renewable, high-energy fuels. A barrier to microbial production of butanols is the increased toxicity compared to ethanol; however, the cellular targets and microbial defense mechanisms remain poorly understood, especially under anaerobic conditions used frequently in industry. Here we took a comparative approach to understand the response of Saccharomyces cerevisiae to 1-butanol, isobutanol, or ethanol, across three genetic backgrounds of varying tolerance in aerobic and anaerobic conditions...
October 9, 2018: G3: Genes—Genomes—Genetics
Manman Zhang, Ying Wang, Peng Liang, Xu Zhao, Mingxing Liang, Bin Zhou
A new photoelectrocatalytic (PEC) and microbial fuel cell (MFC) process was developed and applied to simultaneously remove refractory organic pollutants (i.e., phenol and aniline) from wastewater while recovering energy for in-situ utilization. The current generated by the MFC process was applied to drive the PEC reaction. Compared with single PEC or MFC processes, the PEC-MFC combined process showed higher pollutant and chemical oxygen demand (COD) removal capacities and electricity production. Over 95% of the phenol or aniline was removed by these process, even at high initial concentrations...
September 17, 2018: Chemosphere
Rosane Silva, Darcy Muniz de Almeida, Bianca Catarina Azeredo Cabral, Victor Hugo Giordano Dias, Isadora Cristina de Toledo E Mello, Turán Péter Ürményi, August E Woerner, Rodrigo Soares de Moura Neto, Bruce Budowle, Cristina Aparecida Gomes Nassar
Microorganisms developing in the liner of the spent fuel pool (SFP) and the fuel transfer channel (FTC) of a Nuclear Power Plant (NPP) can form high radiation resistant biofilms and cause corrosion. Due to difficulties and limitations to obtain large samples from SFP and FTC, cotton swabs were used to collect the biofilm from the wall of these installations. Molecular characterization was performed using massively parallel sequencing to obtain a taxonomic and functional gene classification. Also, samples from the drainage system were evaluated because microorganisms may travel over the 12-meter column of the pool water of the Brazilian Nuclear Power Plant (Angra1), which has been functioning since 1985...
2018: PloS One
Yue Yi, Beizhen Xie, Ting Zhao, Zhaoming Li, Devard Stom, Hong Liu
The relatively poor sensitivity is the main bottleneck restricting the application of microbial fuel cell biosensor (MFC-biosensor) for toxicity monitoring. Previous studies have shown that external resistance (Rext ) had an obvious effect on sensor sensitivity. However, these studies reported different results and the reason of this discrepancy was not clear. The objective of this research was to observe the effect of Rext on sensor sensitivity when detecting different types of pollutants and reveal its microbiological mechanism...
September 17, 2018: Bioelectrochemistry
Sascha Siebenhaller, Jennifer Kirchhoff, Frank Kirschhöfer, Gerald Brenner-Weiß, Claudia Muhle-Goll, Burkhard Luy, Fabian Haitz, Thomas Hahn, Susanne Zibek, Christoph Syldatk, Katrin Ochsenreither
Lignocellulose can be converted sustainably to fuels, power and value-added chemicals like fatty acid esters. This study presents a concept for the first eco-friendly enzymatic synthesis of economically important fatty acid sugar esters based on lignocellulosic biomass. To achieve this, beech wood cellulose fiber hydrolysate was applied in three manners: as sugar component, as part of the deep eutectic solvent (DES) reaction system and as carbon source for the microbial production of the fatty acid component...
2018: Frontiers in Chemistry
Suvi Santala, Elena Efimova, Ville Santala
For improving the microbial production of fuels and chemicals, gene knock-outs and overexpression are routinely applied to intensify the carbon flow from substrate to product. However, their possibilities in dynamic control of the flux between the biomass and product synthesis are limited, whereas dynamic metabolic switches can be used for optimizing the distribution of carbon and resources. The production of single cell oils is especially challenging, as the synthesis is strictly regulated, competes directly with biomass, and requires defined conditions, such as nitrogen limitation...
December 2018: Metabolic Engineering Communications
Lijuan Zhang, Weihua He, Junchuan Yang, Jiqing Sun, Huidong Li, Bing Han, Shenlong Zhao, Yanan Shi, Yujie Feng, Zhiyong Tang, Shaoqin Liu
Microbial fuel cells (MFCs) are a promising clean energy source to directly convert waste chemicals to available electric power. However, the practical application of MFCs needs the increased power density, enhanced energy conversion efficiency and reduced electrode material cost. In this study, three-dimensional (3D) macroporous N, P and S co-doped carbon foams (NPS-CFs) were prepared by direct pyrolysis of the commercial bread and employed as free-standing anodes in MFCs. As-obtained NPS-CFs have a large specific surface area (295...
December 30, 2018: Biosensors & Bioelectronics
Alok Patel, Leonidas Matsakas, Parul A Pruthi, Vikas Pruthi
Biodiesel production from vegetable oils is not sustainable and economical due to the food crisis worldwide. The development of a cost-effective non-edible feedstock is essential. In this study, we proposed to use aquatic oomycetes for microbial oils, which are cellulolytic fungus-like filamentous eukaryotic microorganisms, commonly known as water molds. They differ from true fungi as cellulose is present in their cell wall and chitin is absent. They show parasitic as well as saprophytic nature and have great potential to utilize decaying animal and plant debris in freshwater habitats...
September 28, 2018: Environmental Science and Pollution Research International
Mir Reza Majidi, Fatemeh Shahbazi Farahani, Mirghasem Hosseini, Iraj Ahadzadeh
In this work, low cost α-MnO2 nanowires and α-MnO2 nanowires supported on carbon Vulcan (α-MnO2 /C) have been synthesized via a simple and facile hydrothermal method for application in microbial fuel cells. The prepared samples have been characterized by X-ray diffraction (XRD), Raman spectroscopy and field emission scanning electron microscopy (FE-SEM). Electrocatalytic activities of the samples have been evaluated by means of cyclic voltammetry (CV), linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) in a neutral phosphate buffer solution...
September 15, 2018: Bioelectrochemistry
Abhilasha S Mathuriya, Dipak A Jadhav, Makarand M Ghangrekar
Conventional wastewater treatment consumes a large amount of money worldwide for removal of pollutants prior to its discharge into water body or facilitating reuse. Decreasing energy expenditure during wastewater treatment and rather recovering some value-added products while treating wastewater is an important goal for researchers. Microbial fuel cells (MFCs) are representative bioelectrochemical systems, which offer energy-efficient wastewater treatment. MFCs convert chemical energy of organic matter into electrical energy by using biocatalytic activities...
September 26, 2018: Applied Microbiology and Biotechnology
Xiaojing Li, Yue Li, Xiaolin Zhang, Xiaodong Zhao, Yang Sun, Liping Weng, Yongtao Li
Biochar is extensively applied in amendment of contaminated soils. However, the effect of biochar on the biodegradation of petroleum hydrocarbons and electricity generation in soil microbial fuel cells (MFCs) remains unclear. Here, three biochars respectively derived from poultry (chicken manure, CB), agriculture (wheat straw, SB) and forestry industries (wood sawdust, WB) were investigated after 223 days of amendment. Consequently, high removal for alkanes was in CB with the mineral nutrition and phosphorus while aromatics were in SB with the most N content and the highest molecular polarity...
September 8, 2018: Science of the Total Environment
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