<?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>0188-4999</journal-id>
<journal-title><![CDATA[Revista internacional de contaminación ambiental]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Int. Contam. Ambient]]></abbrev-journal-title>
<issn>0188-4999</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias de la Atmósfera y Cambio Climático]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-49992019000200447</article-id>
<article-id pub-id-type="doi">10.20937/rica.2019.35.02.15</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[INOCULUM ADAPTATION FOR THE ANAEROBIC DIGESTION OF MEZCAL VINASSES]]></article-title>
<article-title xml:lang="es"><![CDATA[ADAPTACIÓN DE INÓCULO PARA LA DIGESTIÓN ANAEROBIA DE LAS VINAZAS DEL MEZCAL]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López Velarde Santos]]></surname>
<given-names><![CDATA[Mónica]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ventura Ramos]]></surname>
<given-names><![CDATA[Eusebio Junior]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez Morales]]></surname>
<given-names><![CDATA[José Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hensel]]></surname>
<given-names><![CDATA[Oliver]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universität Kassel Faculty of Organic Agricultural Sciences Department of Agricultural and Biosystems Engineering]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Germany</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Querétaro Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[Santiago de Querétaro Querétaro]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<volume>35</volume>
<numero>2</numero>
<fpage>447</fpage>
<lpage>458</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992019000200447&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992019000200447&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992019000200447&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Vinasses are a very harmful residue of the alcohol distillation, their discharge into soil and water can cause negative environmental impacts if the appropriate treatments do not take place. Anaerobic digestion has shown to be the best technological and economical method to treat this residue, thus bioenergy can be generated as by-product of this process. Nevertheless, the slow adaptation of the microbial consortium in inoculum (activated sludge) to the substrate (mezcal vinasses) is very important to enhance the efficiency of the biogas and methane production, as well as organic matter removal. In this work, the adaptation process of the anaerobic digestion of mezcal vinasses was carried out in a 30-day period. Inoculum (activates sludge) and vinasses were mixed initially at the ratio 7:3. The feeding steps were done every seven days replacing 30 % of the total volume with new vinasses. Biogas was quantified and qualified. Biogas production reached 217 L/kgVSvinasses generating a daily methane content between 50 and 55 % by the end of the adaptation period. The organic matter removal efficiency was almost seven times higher at the end of the adaptation, in comparison to the beginning. This suggests that a slow adaptation process enhance the organic matter removal and eventually other pollutants in vinasses. When comparing this results with the literature, biogas and methane production were similar, nevertheless the anaerobic digestion could be optimized, in order to increase the methane content in biogas and the removal rate of organic matter.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Las vinazas son un residuo proveniente de la destilación de alcohol, su descarga en suelos y aguas puede causar impactos ambientales negativos si no se realizan los tratamientos adecuados antes de considerar su descarga. La digestión anaerobia ha demostrado ser un método con ventajas tecnológicas y económicas para tratar este residuo y generar bioenergía al mismo tiempo. Sin embargo, una lenta adaptación del consorcio microbiano contenido en el inóculo (lodo activado) al sustrato (vinazas del mezcal) es muy importante para mejorar la eficiencia de la producción de biogás y metano, así como la reducción de materia orgánica. En este trabajo, el proceso de adaptación de la digestión anaerobia de las vinazas se llevó a cabo en un período de 30 días. El inóculo (lodo activado) y las vinazas se mezclaron inicialmente en una proporción 7:3. El reactor se alimentó cada siete días reemplazando 30 % del volumen total del reactor con vinazas. La producción de biogás alcanzó 217 L/kgVSvinazas con un contenido de metano de 50 a 55 %. La eficiencia de eliminación de materia orgánica fue casi siete veces mayor al final de la adaptación en comparación con el comienzo. Esto sugiere que una adaptación lenta mejora la reducción de materia orgánica y eventualmente otros contaminantes. Al comparar estos resultados con la literatura, la producción de biogás y metano fue similar, sin embargo, la digestión anaerobia podría optimizarse con el fin de aumentar el contenido de metano en el biogás y reducir la materia orgánica en el sustrato.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[biogas]]></kwd>
<kwd lng="en"><![CDATA[chemical oxygen demand]]></kwd>
<kwd lng="en"><![CDATA[FOS/TAC]]></kwd>
<kwd lng="en"><![CDATA[methane]]></kwd>
<kwd lng="es"><![CDATA[biogás]]></kwd>
<kwd lng="es"><![CDATA[demanda química de oxígeno]]></kwd>
<kwd lng="es"><![CDATA[FOS/TAC]]></kwd>
<kwd lng="es"><![CDATA[metano]]></kwd>
</kwd-group>
</article-meta>
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