<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0121-1935</journal-id>
<journal-title><![CDATA[Revista de Ciencias]]></journal-title>
<abbrev-journal-title><![CDATA[rev. cienc.]]></abbrev-journal-title>
<issn>0121-1935</issn>
<publisher>
<publisher-name><![CDATA[Universidad del Valle]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0121-19352018000200013</article-id>
<article-id pub-id-type="doi">10.25100/rc.v22i2.7910</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Electrochemical Monitoring and Microbial Characterization of a Domestic Wastewater-Fed Microbial Fuel Cell Inoculated with Anaerobic Sludge]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vejarano]]></surname>
<given-names><![CDATA[Felipe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Benítez-Campo]]></surname>
<given-names><![CDATA[Neyla]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bravo]]></surname>
<given-names><![CDATA[Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Loaiza]]></surname>
<given-names><![CDATA[Oscar A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lizcano-Valbuena]]></surname>
<given-names><![CDATA[William H.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad del Valle Departamento de Biología ]]></institution>
<addr-line><![CDATA[Cali ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad del Valle Departamento de Química ]]></institution>
<addr-line><![CDATA[Cali ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<volume>22</volume>
<numero>2</numero>
<fpage>13</fpage>
<lpage>32</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0121-19352018000200013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0121-19352018000200013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0121-19352018000200013&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract A dual-chambered microbial fuel cell with aqueous cathode was operated with domestic wastewater to investigate the electrogenic ability of anaerobic bacteria from a municipal wastewater treatment plant. Curves of cell potential vs. current density, power density vs. current density and current at a fixed load of 100 &#937;, were obtained daily to monitor the electrochemical evolution of the system as a function of substrate use in several batch cycles. A maximum power density of 1.11 &#956;Wcm-2 was obtained after 65 days of continuous operation and a coulombic efficiency of 7% and a chemical oxygen demand removal of 76% were found in the last batch cycle. Anaerobic culture of the bacteria from the anode biofilm resulted in the isolation of two Gram-positive and two Gram-negative bacteria with divergent sugar fermentation capabilities, while analysis of 16S rRNA gene fragments showed three clones from the phyla Firmicutes, &#948;-Proteobacteria and &#945;- Proteobacteria. Scanning electron imaging analysis revealed an increase in cell diversity and proliferation of methanogenic archaea when changing from synthetic to real wastewater. These results reveal the influence of substrate concentration and presence of methanogenic microorganisms on the production of power in microbial fuel cells, suggesting that future developments could be a contribution for the use of this technology to decontaminate domestic wastewater in small communities.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Una celda de combustible microbiana de doble cámara con cátodo inmerso en el agua fue operada con aguas residuales domésticas para investigar la capacidad electrogénica de las bacterias anaeróbicas de una planta de tratamiento de aguas residuales municipales. Se obtuvieron diariamente curvas de potencial de celda vs. densidad de corriente, densidad de potencia vs. densidad de corriente y corriente a una resistencia fija de 100 &#8486; para monitorear la evolución electroquímica del sistema en función del uso del sustrato en varios ciclos de lotes. Se obtuvo una densidad de potencia máxima de 1.11 µWcm-2 después de 65 días de operación continua, una eficiencia coulombic del 7% y una disminución de la Demanda de Oxígeno Químico del 76% en el último ciclo del lote. El cultivo anaeróbico de las bacterias de la biopelícula anódica dio como resultado el aislamiento de dos bacterias Gram-positivas y dos Gram-negativas con capacidades de fermentación de azúcar divergentes, mientras que el análisis de los fragmentos del gen 16S rRNA mostró tres clones de los filos Firmicutes, Prote-Proteobacteria y &#945; -Proteobacterias. El análisis de las imágenes de microscopia electronica de barrido reveló un aumento en la diversidad celular y la proliferación de arqueas metanogénicas al cambiar de aguas residuales sintéticas a reales. Estos resultados revelan la influencia de la concentración de sustrato y la presencia de microorganismos metanogénicos en la producción de energía en la celda de combustible microbiana, lo que sugiere que los desarrollos futuros podrían ser una contribución para el uso de esta tecnología para descontaminar las aguas residuales domésticas en las comunidades rurales.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[bacterial diversity]]></kwd>
<kwd lng="en"><![CDATA[biochemical tests]]></kwd>
<kwd lng="en"><![CDATA[biofilm]]></kwd>
<kwd lng="en"><![CDATA[microbial fuel cell]]></kwd>
<kwd lng="en"><![CDATA[wastewater treatment]]></kwd>
<kwd lng="es"><![CDATA[diversidad bacteriana]]></kwd>
<kwd lng="es"><![CDATA[pruebas bioquímicas]]></kwd>
<kwd lng="es"><![CDATA[biofilmes]]></kwd>
<kwd lng="es"><![CDATA[celda de combustible microbiana]]></kwd>
<kwd lng="es"><![CDATA[tratamiento de aguas residuales.]]></kwd>
</kwd-group>
</article-meta>
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