<?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>1405-7743</journal-id>
<journal-title><![CDATA[Ingeniería, investigación y tecnología]]></journal-title>
<abbrev-journal-title><![CDATA[Ing. invest. y tecnol.]]></abbrev-journal-title>
<issn>1405-7743</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Ingeniería]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-77432017000300265</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Feasibility of the anaerobic digestion of cheese whey in a Plug Flow Reactor (PFR) under local conditions]]></article-title>
<article-title xml:lang="es"><![CDATA[Factibilidad del proceso de la digestión anaerobia del lactosuero en un Reactor de Flujo Pistón (PFR)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Escalante-Hernández]]></surname>
<given-names><![CDATA[Humberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castro-Molano]]></surname>
<given-names><![CDATA[Liliana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Besson]]></surname>
<given-names><![CDATA[Veronique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jaimes-Estévez]]></surname>
<given-names><![CDATA[Jaime]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Industrial de Santander Escuela de Ingeniería Química ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Industrial de Santander Escuela de Ingeniería Química ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Industrial de Santander Escuela de Ingeniería Química ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Industrial de Santander Escuela de Ingeniería Química ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2017</year>
</pub-date>
<volume>18</volume>
<numero>3</numero>
<fpage>265</fpage>
<lpage>277</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-77432017000300265&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-77432017000300265&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-77432017000300265&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The aim of this study was to analyze the behavior and the stabilization of Cheese Whey (CW) anaerobic digestion in a plug flow reactor by means of the effluent recirculation use and the implementation of the Anaerobic Co-Digestion (ACOD) system with Fresh Dairy Manure (FDM). These alternatives were proposed to avoid the potential acidification. For the monodigestion, it was proved that the system cannot support high OLR. The ACOD of CW with FDM presented a benefic alternative because it implemented a balanced medium due to each substrate contribution. The efficiency stability of the process was guaranteed by the buffer capacity, which was kept around 0.4. The ACOD process allowed maintaining process stabilization, and the biogas production surged when recirculation began. The best performance of the system was reached with 2g VS/L*day with recirculation, obtaining a biogas production of 469.2 L/kg*day and a degradation of the 81% in volatile solid basis from the input organic matter.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo del estudio analizó el comportamiento y la estabilización de la Digestión Anaerobia (DA) del lactosuero en un Reactor de Flujo Pistón (PFR) por medio del uso de la recirculación de efluente y de la implementación de la Co-Digestión Anaerobia (CODA) con Estiercol Bovino Fresco (EBF). Al utilizar un sustrato ácido como el lactosuero, el sistema puede inhibirse debido a una alta y rápida producción de ácidos grasos volátiles. Estas alternativas (diseño del reactor, recirculación y EBF como co-sustrato) se propusieron para aumentar la alcalinidad del medio con el ánimo de evitar acidificación. Se comprobó que el sistema DA puede soportar altas cargas orgánicas (OLR). La CODA de LS con EBF se presenta como una alternativa benéfica, ya que suministra un medio balanceado debido a la contribución de cada sustrato. La eficiencia del proceso se garantizó por la capacidad buffer que se mantuvo por debajo de 0.4. La operación de CODA permitió mantener la estabilización del proceso. Por otra parte, la producción de biogás aumentó tan pronto se implementó la recirculación. El mejor rendimiento del sistema se alcanzó con una carga de 2 gSV/L día con recirculación, obteniendo una producción de biogás de 469.2 L de biogás/kg día y una degradación de 81%. Los resultados mostraron potencial para el tratamiento de LS con EBF en un reactor PFR con recirculación.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Anaerobic co digestion]]></kwd>
<kwd lng="en"><![CDATA[biogas]]></kwd>
<kwd lng="en"><![CDATA[plug flow reactor]]></kwd>
<kwd lng="en"><![CDATA[cheese whey]]></kwd>
<kwd lng="en"><![CDATA[recirculation]]></kwd>
<kwd lng="es"><![CDATA[Co-digestión anaerobia]]></kwd>
<kwd lng="es"><![CDATA[biogás]]></kwd>
<kwd lng="es"><![CDATA[reactor de flujo pistón]]></kwd>
<kwd lng="es"><![CDATA[lactosuero]]></kwd>
<kwd lng="es"><![CDATA[recirculación]]></kwd>
</kwd-group>
</article-meta>
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