ADVERTISEMENT RETURN TO ISSUEPREVFEATURENEXTMicrobial Fuel Cells—Challenges and ApplicationsBruce E. Logan John M. ReganCite this: Environ. Sci. Technol. 2006, 40, 17, 5172–5180Publication Date (Web):September 1, 2006Publication History Published online1 September 2006Published inissue 1 2006https://pubs.acs.org/doi/10.1021/es0627592https://doi.org/10.1021/es0627592newsACS Publications. This publication is available under these Terms of Use. Request reuse permissions free to access through...

Comparative 16S rRNA sequencing was used to evaluate phylogenetic relationships among selected strains of ammonia- and nitrite-oxidizing bacteria. All characterized were shown be affiliated with the proteobacteria. The study extended recent rRNA-based studies diversity nitrifiers by comparison eight genus Nitrobacter representatives genera Nitrospira Nitrospina. later delta subdivision proteobacteria but did not share a specific relationship each other or members subdivision. constituted...

Methanogens play a critical role in the decomposition of organics under anaerobic conditions. The methanogenic consortia saturated wetland soils are often subjected to large temperature fluctuations and acidic conditions, imposing selective pressure for psychro- acidotolerant community members; however, communities engineered digesters frequently maintained within narrow range mesophilic circumneutral conditions retain system stability. To investigate hypothesis that these two disparate...

Bacteria able to generate electricity in microbial fuel cells (MFCs) are of great interest, but there few strains capable high power production these systems. Here we report that the phototrophic purple nonsulfur bacterium Rhodopseudomonas palustris DX-1, isolated from an MFC, produced at higher densities (2720 ± 60 mW/m2) than mixed cultures same device. While species known for their ability hydrogen, they have not previously been shown and current was generated without need light or...

Microbial fuel cells (MFCs) convert biodegradable materials into electricity, potentially contributing to an array of renewable energy production strategies tailored for specific applications. Since there are no known microorganisms that can both metabolize cellulose and transfer electrons solid extracellular substrates, the conversion cellulosic biomass electricity requires a syntrophic microbial community uses insoluble electron donor (cellulose) acceptor (anode). Electricity was generated...

Exoelectrogenic bacteria have potential for many different biotechnology applications due to their ability transfer electrons outside the cell insoluble electron acceptors, such as metal oxides or anodes of microbial fuel cells (MFCs). Very few exoelectrogens been directly isolated from MFCs, and all these organisms obtained by techniques that potentially restrict diversity exoelectrogenic bacteria. A special U-tube-shaped MFC was therefore developed enrich with isolation based on...

Electricity can be directly generated by bacteria in microbial fuel cells (MFCs) from many different biodegradable substrates. When cellulose is used as the substrate, electricity generation requires a community with both cellulolytic and exoelectrogenic activities. Cellulose degradation production pure culture has not been previously demonstrated without addition of an exogenous mediator. Using specially designed U-tube MFC, we enriched consortium capable using sole electron donor. After 19...

Abstract Ammonia losses during swine wastewater treatment were examined using single‐ and two‐chambered microbial fuel cells (MFCs). removal was 60% over 5 days for a single‐chamber MFC with the cathode exposed to air (air–cathode), versus 69% 13 from anode chamber in two‐chamber ferricyanide catholyte. In both types of systems, ammonia accelerated electricity generation. For air–cathode system, our results suggest that nitrogen generation increased due volatilization conversion ammonium ion...

Methanogens are of great importance in carbon cycling and alternative energy production, but quantitation with culture-based methods is time-consuming biased against methanogen groups that difficult to cultivate a laboratory. For these reasons, methanogens typically studied through culture-independent molecular techniques. We developed SYBR green I quantitative PCR (qPCR) assay quantify total numbers methyl coenzyme M reductase alpha-subunit (mcrA) genes. TaqMan probes were also designed...

The external resistance (R(ext)) of microbial fuel cells (MFCs) regulates both the anode availability as an electron acceptor and flux through circuit. We evaluated effects R(ext) on MFCs using acetate or glucose. average current densities (I) ranged from 40.5 mA/m(2) (9,800 Ω) to 284.5 (150 for acetate-fed (acetate-fed reactors [ARs]), with a corresponding potential (E(an)) range -188 -4 mV (versus standard hydrogen electrode [SHE]). For glucose-fed (glucose-fed [GRs]), I 40.0 273.0 Ω),...

Nitrification in drinking water distribution systems is a common operational problem for many utilities that use chloramines secondary disinfection. The diversity of ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing (NOB) the pilot-scale chloraminated treatment system was characterized using terminal restriction fragment length polymorphism (T-RFLP) analysis 16S rRNA gene (ribosomal DNA [rDNA]) cloning sequencing. For ammonia oxidizers, rDNA-targeted T-RFLP indicated presence...

<i>Objectives:</i> This study tests the robustness of relationships between primary care, income inequality, and population health by (1) assessing relationship during 4 time periods—1980, 1985, 1990 1995; (2) examining independent effect components care physician supply; (3) using 2 different measures inequality (Robin Hood index Gini coefficient); (4) testing association 5-year time-lagged variables. <i>Data Sources/Study Setting:</i> Data are derived from Compressed Mortality Files, US...

Electrochemical impedance spectroscopy (EIS) was used to study the behavior of a microbial fuel cell (MFC) during initial biofilm growth in an acetate-fed, two-chamber MFC system with ferricyanide cathode. EIS experiments were performed both on full (between cathode and anode) as well individual electrodes. The Nyquist plots data fitted equivalent electrical circuit estimate contributions various intrinsic resistances overall internal impedance. During development anode biofilm, polarization...

Microbial fuel cells (MFCs) are often inoculated from a single wastewater source. The extent that the inoculum affects community development or power production is unknown. stable anodic microbial communities in MFCs were examined using three inocula: treatment plant sample known to produce consistent densities, second sample, and an anaerobic bog sediment. bog-inoculated initially produced higher densities than wastewater-inoculated MFCs, but after 20 cycles all on average converged similar...