<?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>2071-0054</journal-id>
<journal-title><![CDATA[Revista Ciencias Técnicas Agropecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cie Téc Agr]]></abbrev-journal-title>
<issn>2071-0054</issn>
<publisher>
<publisher-name><![CDATA[Universidad Agraria de La Habana]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2071-00542024000200006</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Anaerobic digestion of cow manure in a plug-flow digester: A sustainable approach]]></article-title>
<article-title xml:lang="es"><![CDATA[Digestión anaerobia de estiércol vacuno en un digestor de flujo pistón: un acercamiento sostenible]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Méndez-Saavedra]]></surname>
<given-names><![CDATA[Carlos Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cabrera-Díaz]]></surname>
<given-names><![CDATA[Ania]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Oliva-Merencio]]></surname>
<given-names><![CDATA[Deny]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pereda-Reyes]]></surname>
<given-names><![CDATA[Ileana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Tecnológica de La Habana &#8220;José A. Echeverría&#8221; Centro de Estudio de Ingeniería de Procesos ]]></institution>
<addr-line><![CDATA[Marianao La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Tecnológica de La Habana &#8220;José A. Echeverría&#8221; Centro de Estudio de Tecnologías Energéticas Renovables ]]></institution>
<addr-line><![CDATA[Marianao La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2024</year>
</pub-date>
<volume>33</volume>
<numero>2</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2071-00542024000200006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2071-00542024000200006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2071-00542024000200006&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT In this study, a pilot-scale plug flow reactor has been operated at a hydraulic retention time of 30 d with substrate concentration of total solids (7-10 %) under room temperature ranging from 25-38 °C with a working volume of 1.44*10-3 m3 during 186 days. The average chemical oxygen demand (COD) removal was 66.9 % operating at 1.7 kgVS/m3d. Moreover, the alkalinity to total inorganic carbon rated 0.31 being considered a proper value for the operational control of the reactor. In addition, 65.1 % of Total Volatile Solids removal was attained. The specific biogas and methane yields were up to 0.22 m3/kg VS, 0.25 m3/kg VS, respectively. Long-term operation in a pilot scale demonstrated the technological potential and industrial application of cattle manure treatment for biogas production as a circular economy contribution.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN En este estudio, se operó un reactor de flujo pistón a escala piloto con un tiempo de retención hidráulica de 30 días con una concentración de sustrato de sólidos totales (7-10 %) a temperatura ambiente que oscilaba entre 25 y 38 °C, con un volumen de trabajo de 1,44 *10-3 m3 durante 186 días. La remoción promedio de la demanda química de oxígeno (DQO) fue del 66,9 % operando a 1,7 kgVS/m3d. Por otro lado, la relación de la alcalinidad con respecto al carbono inorgánico total fue de 0,31, considerándose un valor adecuado para el control operativo del reactor. Además, se alcanzó el 65,1 % de remoción de Sólidos Volátiles Totales. Los rendimientos específicos de biogás y metano fueron de hasta 0,22 m3/kg VS y 0,25 m3/kg VS, respectivamente. La operación a largo plazo a escala piloto demostró el potencial tecnológico y la aplicación industrial del tratamiento del estiércol de ganado para la producción de biogás como contribución a la economía circular.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Biodegradability]]></kwd>
<kwd lng="en"><![CDATA[Circular Economy]]></kwd>
<kwd lng="en"><![CDATA[Local Development]]></kwd>
<kwd lng="es"><![CDATA[biodegradabilidad]]></kwd>
<kwd lng="es"><![CDATA[economía circular]]></kwd>
<kwd lng="es"><![CDATA[desarrollo local]]></kwd>
</kwd-group>
</article-meta>
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