<?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>1665-2738</journal-id>
<journal-title><![CDATA[Revista mexicana de ingeniería química]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Ing. Quím]]></abbrev-journal-title>
<issn>1665-2738</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Metropolitana, División de Ciencias Básicas e Ingeniería]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-27382015000100006</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Stabilization by co-composting of solids removed from wastewater treatment plant of a cheese factory]]></article-title>
<article-title xml:lang="es"><![CDATA[Estabilización por co-compostaje de sólidos removidos de una planta de tratamiento de aguas residuales de una quesería]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vicencio-de la Rosa]]></surname>
<given-names><![CDATA[M.G.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valencia-Vázquez]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-López]]></surname>
<given-names><![CDATA[M.E.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Prado]]></surname>
<given-names><![CDATA[M.A.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Ramírez]]></surname>
<given-names><![CDATA[E.S.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Instituto Politécnico Nacional Academia de Ciencias Ambientales ]]></institution>
<addr-line><![CDATA[ Durango]]></addr-line>
<country>México</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Instituto Tecnológico de Durango Depto. de Ingenierías Química y Bioquímica ]]></institution>
<addr-line><![CDATA[ Durango]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2015</year>
</pub-date>
<volume>14</volume>
<numero>1</numero>
<fpage>61</fpage>
<lpage>71</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-27382015000100006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-27382015000100006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-27382015000100006&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[A wastewater plant of a dairy industry generates 1.6 tons/month of settleable solids and 650 kg/week of floatable solids, which if not adequately disposed off, can cause serious soil contamination and vector attraction. A composting process for stabilizing residues with high fat content that generate unpleasant odors is presented. Laboratory experiments were carried out for determining the appropriate process parameters and scaled-up for the in situ process. Laboratory tests with cattle manure showed a reduction in the production of malodorous gases in three weeks. The resulting compost complied with national and international standards, and can be used in 1:3 compost:soil ratio for soil improvement. The waste stabilized in situ complied with most parameters established in the Mexican regulation (NOM-FF-109-SCFI-2007), excepting pH (9.6) and electrical conductivity (5 dS/m).]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Una planta de tratamiento de aguas residuales de una industria láctea genera alrededor de 1.6 ton/mes de sólidos sedimentables y 650 kg/semana de sólidos flotantes; los cuales no se disponen adecuadamente, causando problemas de contaminación de suelo y atracción de vectores. Este trabajo presenta una solución práctica a la industria quesera; un proceso de compostaje para estabilizar los residuos con alto contenido de grasa, los cuales generan olores desagradables. Con la finalidad de establecer los parámetros del proceso se llevó a cabo experimentación a nivel laboratorio y posteriormente se escaló, para adaptar el proceso in situ. Los resultados de laboratorio mostraron la reducción en la producción de gases malolientes en tres semanas con el uso de estiércol vacuno y el compost obtenido cumplió con la normatividad nacional e internacional; y puede ser usado a una relación 1:3 (compost:suelo) para mejorar el suelo de los jardines de la empresa. El proceso de estabilización in situ cumple con la mayoría de los parámetros que marca la normatividad, excepto en pH (9.6) y conductividad eléctrica (5 dS/m) (NMX-FF-109-SCFI-2007). El costo de producción del proceso de estabilización fue bajo comparado con el asociado al tratamiento típico de los residuos, aparte de su implícita sustentabilidad.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[co-composting]]></kwd>
<kwd lng="en"><![CDATA[high grease content residues]]></kwd>
<kwd lng="en"><![CDATA[dairy cattle manure]]></kwd>
<kwd lng="en"><![CDATA[compost quality]]></kwd>
<kwd lng="en"><![CDATA[cost]]></kwd>
<kwd lng="es"><![CDATA[co-compostaje]]></kwd>
<kwd lng="es"><![CDATA[residuos con alto contenido de grasa]]></kwd>
<kwd lng="es"><![CDATA[estiércol vacuno]]></kwd>
<kwd lng="es"><![CDATA[calidad del compost]]></kwd>
<kwd lng="es"><![CDATA[costo]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Biotecnolog&iacute;a</font></p>     <p align="justify">&nbsp;</p> 	    <p align="center"><font face="verdana" size="4"><b>Stabilization by co&#45;composting of solids removed from wastewater treatment plant of a cheese factory</b></font></p>     <p align="center">&nbsp;</p>     <p align="center"><font face="verdana" size="3"><b>Estabilizaci&oacute;n por co&#45;compostaje de s&oacute;lidos removidos de una planta de tratamiento de aguas residuales de una queser&iacute;a</b></font></p>     <p align="center">&nbsp;</p>  	    <p align="center"><font face="verdana" size="2"><b>M.G. Vicencio&#45;de la Rosa<sup>1</sup>*, R. Valencia&#45;V&aacute;zquez<sup>2</sup>, M.E. P&eacute;rez&#45;L&oacute;pez<sup>1</sup>, M.A. Mart&iacute;nez&#45;Prado<sup>2</sup> and E.S. Ram&iacute;rez&#45;Ram&iacute;rez<sup>2</sup></b><sup></sup></font></p>     <p align="center">&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><i><sup>1</sup> Instituto Polit&eacute;cnico Nacional, CIIDIR&#45;Durango, Academia de Ciencias Ambientales, Sigma 119, Fracc. 20 de Noviembre II, CP. 34228, Durango, Durango, M&eacute;xico.  </i>*Corresponding author. E&#45;mail: <a href="mailto:vicenciog@yahoo.com">vicenciog@yahoo.c</a><a href="mailto:vicenciog@yahoo.com">om</a></font></p> 	    <p align="justify"><font face="verdana" size="2"><i><sup>2</sup> Instituto Tecnol&oacute;gico de Durango, Depto. de Ingenier&iacute;as Qu&iacute;mica y Bioqu&iacute;mica, Blvd. Felipe Pescador 1830 Ote., Col. Nueva Vizcaya, C.P. 34080, Durango, Durango, M&eacute;xico.</i> </font></p> 	    ]]></body>
<body><![CDATA[<p align="justify">&nbsp;</p> 	    <p align="justify"><font face="verdana" size="2">Received July 14, 2014    <br>Accepted February 25, 2015</font></p>     <p align="justify">&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>  	    <p align="justify"><font face="verdana" size="2">A wastewater plant of a dairy  industry generates 1.6 tons/month of settleable solids and 650 kg/week of floatable solids, which if not adequately disposed off, can cause serious soil contamination and vector attraction. A composting process for stabilizing residues with high fat content that generate unpleasant odors is presented. Laboratory experiments were carried out for determining the appropriate process parameters and scaled&#45;up for the in situ process. Laboratory tests with cattle manure showed a reduction in the production of malodorous gases in three weeks. The resulting compost complied with national and international standards, and can be used in 1:3 compost:soil ratio for soil improvement. The waste stabilized in situ complied with most parameters established in the Mexican regulation (NOM&#45;FF&#45;109&#45;SCFI&#45;2007), excepting pH (9.6) and electrical conductivity (5 dS/m).</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Key words:</b> co&#45;composting, high grease content residues, dairy cattle manure, compost quality, cost. </font></p> 	    <p align="justify">&nbsp;</p>     <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>  	    <p align="justify"><font face="verdana" size="2">Una planta de tratamiento de aguas residuales de una industria l&aacute;ctea genera alrededor de 1.6 ton/mes de s&oacute;lidos sedimentables y 650 kg/semana de s&oacute;lidos flotantes; los cuales no se disponen adecuadamente, causando problemas de contaminaci&oacute;n de suelo y atracci&oacute;n de vectores. Este trabajo presenta una soluci&oacute;n pr&aacute;ctica a la industria quesera; un proceso de compostaje para estabilizar los residuos con alto contenido de grasa, los cuales generan olores desagradables. Con la finalidad de establecer los par&aacute;metros del proceso se llev&oacute; a cabo experimentaci&oacute;n a nivel laboratorio y posteriormente se escal&oacute;, para adaptar el proceso <i>in situ.</i> Los resultados de laboratorio mostraron la reducci&oacute;n en la producci&oacute;n de gases malolientes en tres semanas con el uso de esti&eacute;rcol vacuno y el compost obtenido cumpli&oacute; con la normatividad nacional e internacional; y puede ser usado a una relaci&oacute;n 1:3 (compost:suelo) para mejorar el suelo de los jardines de la empresa. El proceso de estabilizaci&oacute;n <i>in situ</i> cumple con la mayor&iacute;a de los par&aacute;metros que marca la normatividad, excepto en pH (9.6) y conductividad el&eacute;ctrica (5 dS/m) (NMX&#45;FF&#45;109&#45;SCFI&#45;2007). El costo de producci&oacute;n del proceso de estabilizaci&oacute;n fue bajo comparado con el asociado al tratamiento t&iacute;pico de los residuos, aparte de su impl&iacute;cita sustentabilidad.</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"><b>Palabras clave:</b> co&#45;compostaje, residuos con alto contenido de grasa, esti&eacute;rcol vacuno, calidad del compost, costo.</font></p>     <p>&nbsp;</p>     <p align="justify"><font face="verdana" size="2"><a href="../pdf/rmiq/v14n1/v14n1a6.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>     <p>&nbsp;</p>     <p align="justify"><font face="verdana" size="2"><b>Acknowledgements</b></font></p>  	    <p align="justify"><font face="verdana" size="2">This research was funded by Sociedad Cooperativa de Producci&oacute;n, Queser&iacute;a Holanda, S.R.L. (Sociedad de Responsabilidad Limitada) with supplying materials, residues, and facilities; National Polytechnic Institute Interdisciplinary Research Center for the Local Integral Research, at Durango (IPN CIIDIR&#45;DGO, Spanish acronym); and Mixed Funds&#45;Durango (COCyTED Project: FOMIX&#45;DGO&#45;2008&#45;CO4&#45;95323), including undergraduate scholarship.</font></p>  	    <p align="justify">&nbsp;</p>     <p align="justify"><font face="verdana" size="2"><b>References</b></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">Banwart G. J. (1979). <i>Microbiolog&iacute;a de alimentos,</i> en: Deterioro de los alimentos. AVI Publishing Co. N.Y., USA.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8584359&pid=S1665-2738201500010000600001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    ]]></body>
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