<?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>S0188-49992019000100247</article-id>
<article-id pub-id-type="doi">10.20937/rica.2019.35.01.18</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[USO DE BACTERIAS ÁCIDO LÁCTICAS PARA DESCONTAMINACIÓN DE ESTIÉRCOL PORCINO MEDIANTE ENSILAJE EXPERIMENTAL]]></article-title>
<article-title xml:lang="en"><![CDATA[USE OF LACTIC-ACID BACTERIA TO DECONTAMINATION OF PIG MANURE THROUGH EXPERIMENTAL SILAGE]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ruvalcaba-Gómez]]></surname>
<given-names><![CDATA[José Martín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arteaga-Garibay]]></surname>
<given-names><![CDATA[Ramón Ignacio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez-Araujo]]></surname>
<given-names><![CDATA[Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Galindo-Barboza]]></surname>
<given-names><![CDATA[Alberto Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salazar-Gutiérrez]]></surname>
<given-names><![CDATA[Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Peña]]></surname>
<given-names><![CDATA[Marcos Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Delgado-Macuil]]></surname>
<given-names><![CDATA[Raúl Jacobo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias Centro Nacional de Recursos Genéticos ]]></institution>
<addr-line><![CDATA[Tepatitlán de Morelos Jalisco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Politécnico Nacional Centro de Investigación en Biotecnología Aplicada ]]></institution>
<addr-line><![CDATA[Tlaxcala ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias Campo Experimental Centro Altos de Jalisco ]]></institution>
<addr-line><![CDATA[Tepatitlán de Morelos Jalisco]]></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>1</numero>
<fpage>247</fpage>
<lpage>257</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992019000100247&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992019000100247&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992019000100247&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La actividad porcina genera diariamente una gran cantidad de residuos conformados por nutrientes y microorganismos que potencialmente contribuyen a la contaminación de agua, aire y suelos, y la subsecuente generación de olores desagradables. Diversas estrategias se han desarrollado para mitigar el efecto contaminante de las excretas porcinas y aprovechar sus nutrientes; tal es el caso del ensilaje, que consiste en la fermentación de las excretas. En este estudio se evaluó el efecto del ensilaje del estiércol porcino adicionado con dos fuentes diferentes de carbohidratos y dos fuentes de bacterias ácido lácticas, sobre la reducción de diferentes grupos de microorganismos. Durante el proceso se observó la disminución del pH (hasta 4.6) y la carga microbiana, sobre todo para organismos coliformes (reducción mayor a 5 logaritmos) y hongos y levaduras, así como la eliminación total del grupo de enterococos; mientras que el contenido de bacterias ácido lácticas, principales responsables de la fermentación, permaneció constante. Los mejores resultados se observaron mediante el uso de sorgo como fuente de carbohidratos en combinación con suero de leche, subproducto de la elaboración de queso, como fuente de bacterias ácido lácticas, tanto en disminución del pH como en la reducción de algunos indicadores microbiológicos, incluidas las bacterias productoras de ácido sulfhídrico. Mediante el ensilaje del estiércol porcino se favorece la disminución del pH por acción de las bacterias ácido lácticas a niveles que limitan la sobrevivencia de microorganismos asociados a contaminación fecal, y lo transforman en un producto seguro, desde la perspectiva microbiológica, para su manejo y posible aprovechamiento subsecuente.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Swine production generates every day a large amount of residues, including nutrients and microorganisms, which potentially contribute to contamination of air, water and soil, and generation of unpleasant odors. Many strategies have been developed in order to mitigate the contaminant effect of swine manure and to take advantage of its nutrients and beneficial compounds; silage is an example of these, and consists in swine manure fermentation mainly under anaerobic conditions. The aim of this study was to assess the effect of applying a process of silage to swine manure added with two different sources of carbohydrates and two different sources of lactic-acid bacteria, under the reduction of different microbiological indicators. Through the process, it was observed the reduction of pH levels (until reaching 4.6) and microbial content, mainly for coliforms (reduction greater than 5 log), molds and yeasts, and total elimination of enterococci. On the other hand, significant decline was not reported for the lactic-acid bacteria content, main responsible of fermentation process. Best results were observed through using sorghum as a source of carbohydrates and cheese whey as a source of lactic-acid bacteria, for both, decrease of pH and reduction of some microbiological indicators, including bacteria that produce sulfuric acid. Therefore, silage process, applied to swine manure, induces the decrease of pH for action of lactic-acid bacteria until limit the survival of bacteria associated with fecal contamination, making of swine a transformed and microbiologically safe residue for its handling and subsequent use.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[ensilaje]]></kwd>
<kwd lng="es"><![CDATA[cerdaza]]></kwd>
<kwd lng="es"><![CDATA[fermentación acido-láctica]]></kwd>
<kwd lng="es"><![CDATA[descontaminación]]></kwd>
<kwd lng="en"><![CDATA[silage]]></kwd>
<kwd lng="en"><![CDATA[pig manure]]></kwd>
<kwd lng="en"><![CDATA[lactic-acid fermentation]]></kwd>
<kwd lng="en"><![CDATA[decontamination]]></kwd>
</kwd-group>
</article-meta>
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