@article {3113,
	title = {Correlation between microbial community and granule conductivity in anaerobic bioreactors for brewery wastewater treatment.},
	journal = {Bioresour Technol},
	volume = {174},
	year = {2014},
	month = {2014 Dec},
	pages = {306-10},
	abstract = {<p>Prior investigation of an upflow anaerobic sludge blanket (UASB) reactor treating brewery wastes suggested that direct interspecies electron transfer (DIET) significantly contributed to interspecies electron transfer to methanogens. To investigate DIET in granules further, the electrical conductivity and bacterial community composition of granules in fourteen samples from four different UASB reactors treating brewery wastes were investigated. All of the UASB granules were electrically conductive whereas control granules from ANAMMOX (ANaerobic AMMonium OXidation) reactors and microbial granules from an aerobic bioreactor designed for phosphate removal were not. There was a moderate correlation (r=0.67) between the abundance of Geobacter species in the UASB granules and granule conductivity, suggesting that Geobacter contributed to granule conductivity. These results, coupled with previous studies, which have demonstrated that Geobacter species can donate electrons to methanogens that are typically predominant in anaerobic digesters, suggest that DIET may be a widespread phenomenon in UASB reactors treating brewery wastes.</p>},
	keywords = {Alcoholic Beverages, Anaerobiosis, Bacteria, Bioreactors, Electric Conductivity, Ethanol, Sequence Analysis, DNA, Sewage, Waste Disposal, Fluid, Wastewater, Water Purification},
	issn = {1873-2976},
	doi = {10.1016/j.biortech.2014.10.004},
	author = {Shrestha, Pravin Malla and Malvankar, Nikhil S and Werner, Jeffrey J and Franks, Ashley E and Elena-Rotaru, Amelia and Shrestha, Minita and Liu, Fanghua and Nevin, Kelly P and Angenent, Largus T and Lovley, Derek R}
}
@article {431,
	title = {Direct exchange of electrons within aggregates of an evolved syntrophic coculture of anaerobic bacteria.},
	journal = {Science},
	volume = {330},
	year = {2010},
	month = {2010 Dec 3},
	pages = {1413-5},
	abstract = {Microbial consortia that cooperatively exchange electrons play a key role in the anaerobic processing of organic matter. Interspecies hydrogen transfer is a well-documented strategy for electron exchange in dispersed laboratory cultures, but cooperative partners in natural environments often form multispecies aggregates. We found that laboratory evolution of a coculture of Geobacter metallireducens and Geobacter sulfurreducens metabolizing ethanol favored the formation of aggregates that were electrically conductive. Sequencing aggregate DNA revealed selection for a mutation that enhances the production of a c-type cytochrome involved in extracellular electron transfer and accelerates the formation of aggregates. Aggregate formation was also much faster in mutants that were deficient in interspecies hydrogen transfer, further suggesting direct interspecies electron transfer.},
	keywords = {Anaerobiosis, Bacterial Proteins, Biological Evolution, Culture Media, Cytochrome c Group, Electron Transport, Electrons, Ethanol, Fimbriae Proteins, Geobacter, Hydrogen, Microbial Consortia, Microbial Interactions, Mutation, Oxidation-Reduction, Selection, Genetic},
	issn = {1095-9203},
	doi = {10.1126/science.1196526},
	author = {Summers, Zarath M and Fogarty, Heather E and Leang, Ching and Franks, Ashley E and Malvankar, Nikhil S and Lovley, Derek R}
}
@article {448,
	title = {Stimulating the anaerobic degradation of aromatic hydrocarbons in contaminated sediments by providing an electrode as the electron acceptor.},
	journal = {Environ Microbiol},
	volume = {12},
	year = {2010},
	month = {2010 Apr},
	pages = {1011-20},
	abstract = {The possibility that electrodes might serve as an electron acceptor to simulate the degradation of aromatic hydrocarbons in anaerobic contaminated sediments was investigated. Initial studies with Geobacter metallireducens demonstrated that although toluene was rapidly adsorbed onto the graphite electrodes it was rapidly oxidized to carbon dioxide with the electrode serving as the sole electron acceptor. Providing graphite electrodes as an electron acceptor in hydrocarbon-contaminated sediments significantly stimulated the removal of added toluene and benzene. Rates of toluene and benzene removal accelerated with continued additions of toluene and benzene. [(14)C]-Toluene and [(14)C]-benzene were quantitatively recovered as [(14)C]-CO(2), demonstrating that even though the graphite adsorbed toluene and benzene they were degraded. Introducing an electrode as an electron acceptor also accelerated the loss of added naphthalene and [(14)C]-naphthalene was converted to [(14)C]-CO(2). The results suggest that graphite electrodes can serve as an electron acceptor for the degradation of aromatic hydrocarbon contaminants in sediments, co-localizing the contaminants, the degradative organisms and the electron acceptor. Once in position, they provide a permanent, low-maintenance source of electron acceptor. Thus, graphite electrodes may offer an attractive alternative for enhancing contaminant degradation in anoxic environments.},
	keywords = {Anaerobiosis, Benzene, Carbon Dioxide, Electrodes, Geobacter, Geologic Sediments, Graphite, Naphthalenes, Oxidation-Reduction, Toluene, Water Pollutants, Chemical},
	issn = {1462-2920},
	doi = {10.1111/j.1462-2920.2009.02145.x},
	author = {Zhang, Tian and Gannon, Sarah M and Nevin, Kelly P and Franks, Ashley E and Lovley, Derek R}
}
