<?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>2007-2422</journal-id>
<journal-title><![CDATA[Tecnología y ciencias del agua]]></journal-title>
<abbrev-journal-title><![CDATA[Tecnol. cienc. agua]]></abbrev-journal-title>
<issn>2007-2422</issn>
<publisher>
<publisher-name><![CDATA[Instituto Mexicano de Tecnología del Agua, Coordinación de Comunicación, Participación e Información]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-24222018000200086</article-id>
<article-id pub-id-type="doi">10.24850/j-tyca-2018-02-04</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Recuperación de metano y reducción de emisiones en PTAR Nuevo Laredo, Tamaulipas, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Methane recovery and reduction of greenhouse gas emissions: WWTP Nuevo Laredo, Tamaulipas, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguilar-Benitez]]></surname>
<given-names><![CDATA[Ismael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Blanco]]></surname>
<given-names><![CDATA[Perla A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,El Colegio de la Frontera Norte  ]]></institution>
<addr-line><![CDATA[ Monterrey]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,El Colegio de la Frontera Norte  ]]></institution>
<addr-line><![CDATA[Monterrey ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2018</year>
</pub-date>
<volume>9</volume>
<numero>2</numero>
<fpage>86</fpage>
<lpage>114</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-24222018000200086&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-24222018000200086&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-24222018000200086&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En este trabajo se examina la recuperación de energía de lodos de aguas residuales, mediante el aprovechamiento del metano generado en procesos anaerobios, como un mecanismo para reducir las emisiones de gases de efecto invernadero (GEI). Se estudia la Planta Internacional de Tratamiento de Aguas Residuales de Nuevo Laredo, Tamaulipas (PTAR-NL), cuya capacidad de diseño, nivel de eficiencia energética actual y calidad final de lodos hace relevante un ejercicio prospectivo. Para evaluar la eficiencia energética de la planta se utiliza un enfoque benchmarking con seis características clave en el uso de energía; se estima la producción potencial de energía eléctrica teórica a partir del metano potencialmente capturado, y se realiza un ejercicio de apreciación ex-ante de emisiones de GEI para proyectos de mecanismos de desarrollo limpio (MDL) en PTAR. Los resultados más importantes son: a) que el aprovechamiento de lodos para la generación de energía en PTAR-NL disminuiría las emisiones de GEI por el tratamiento de lodos en 21%; b) la generación de energía eléctrica mediante recuperación de metano aportaría el 14% de la energía requerida por la planta, y c) además, la eficiencia energética de la planta mejora en 2%. Para la implementación de recuperación de metano en PTARs aeróbicas con tratamiento de lodos en condiciones anaeróbicas se requiere de estudios específicos de factibilidad técnica, legal y económica; sin embargo, este ejercicio muestra relevantes beneficios ambientales en su implementación.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In this paper, we studied energy recovery from anaerobic digestion of sewage sludge in Waste Water Treatment Plants (WWTP), as a mechanism to reduce Greenhouse Gas (GHG) emissions and improve energy efficiency. We analyzed the case of the International Wastewater Treatment Plant at Nuevo Laredo (WWTP-NL), which is considered energy efficient and produces good quality sewage sludge. We utilized a benchmarking approach based on a multiparametric model with six key variables to evaluate the energy use efficiency of the WWTP-NL. The prospective electric energy production was estimated based on the potential amount of methane recovered. Then, we compared baseline and projected GHG emissions. For this purpose, we used the Clean Development Mechanism (CDM) methodology to project the recovery of biogas in wastewater by introducing an anaerobic treatment system for sludge treatment. The main findings of this prospective exercise are that the implementation of an energy recovery project in the WWTP-NL would: reduce the plant&#8217;s GHG by 21%; supply 14% of the energy required by the plant; and improve the energy efficiency of the plant by 2%. Specific technical, legal and economic feasibility studies are required for the practical implementation of this theoretical energy WWTP recovery project; nonetheless, this exercise shows that the project would generate clear environmental benefits.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[tratamiento de aguas residuales]]></kwd>
<kwd lng="es"><![CDATA[lodos residuales]]></kwd>
<kwd lng="es"><![CDATA[recuperación de metano]]></kwd>
<kwd lng="es"><![CDATA[eficiencia energética]]></kwd>
<kwd lng="es"><![CDATA[emisiones GEI]]></kwd>
<kwd lng="en"><![CDATA[Wastewater treatment]]></kwd>
<kwd lng="en"><![CDATA[sewage sludge]]></kwd>
<kwd lng="en"><![CDATA[methane recovery]]></kwd>
<kwd lng="en"><![CDATA[energy use efficiency]]></kwd>
<kwd lng="en"><![CDATA[GHG emissions]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Appels]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Baeyens]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Degreve]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Dewil]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Principles and potential of the anaerobic digestion of waste-activated sludge]]></article-title>
<source><![CDATA[Progress in Energy and Combustion Science]]></source>
<year>2008</year>
<volume>34</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>755-81</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="">
<collab>American Water Works Association</collab>
<source><![CDATA[Energy index development for Benchmarking water and wastewater Utilities]]></source>
<year>2007</year>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bachmann]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Jansen]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Baxter]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Bochmann]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Montpart]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<source><![CDATA[Sustainable biogas production in municipal wastewater treatment plants]]></source>
<year>2015</year>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Blanco]]></surname>
<given-names><![CDATA[J. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Aprovechamiento de lodos residuales para cerrar el ciclo urbano del agua, mejorar la eficiencia energética y reducir los GEI: caso de la PITAR Nuevo Laredo]]></source>
<year>2014</year>
<publisher-loc><![CDATA[Monterrey, México ]]></publisher-loc>
<publisher-name><![CDATA[El Colegio de la Frontera Norte]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chacón]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Giner]]></surname>
<given-names><![CDATA[M. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Vázquez]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Roe]]></surname>
<given-names><![CDATA[S. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Maldonado]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Lindquist]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Strode]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Anderson]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Quiroz]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Schreiber]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Emisiones de gases de efecto invernadero en Tamaulipas y proyecciones de casos de referencia 1990-2025]]></source>
<year>2010</year>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="">
<collab>Comisión Nacional del Agua</collab>
<source><![CDATA[Inventario nacional de plantas municipales de potabilización y de tratamiento de aguas residuales en operación]]></source>
<year>2011</year>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="">
<collab>Comisión Nacional del Agua</collab>
<source><![CDATA[Inventario nacional de plantas municipales de potabilización y de tratamiento de aguas residuales en operación]]></source>
<year>2014</year>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="">
<collab>Environmental Protection Agency</collab>
<source><![CDATA[Global anthropogenic Non-CO 2 greenhouse gas emissions: 1990-2030]]></source>
<year>2012</year>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="book">
<collab>Instituto de Investigaciones Eléctricas</collab>
<source><![CDATA[Guía de usuario. Generación de electricidad mediante residuos sólidos urbanos]]></source>
<year>2012</year>
<publisher-loc><![CDATA[Temixco, México ]]></publisher-loc>
<publisher-name><![CDATA[Instituto de Investigaciones Eléctricas]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="">
<collab>Instituto para la Diversificación y Ahorro de la Energía</collab>
<source><![CDATA[Biomasa. Digestores anaerobios]]></source>
<year>2007</year>
</nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jorgensen]]></surname>
<given-names><![CDATA[P. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Biogas, green energy. Process-Design-Energy supply-Environment]]></source>
<year>2009</year>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lazarova]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Peregrina]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Pascal]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Towards energy self-sufficiency of wastewater treatment]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Lazarova]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Choo]]></surname>
<given-names><![CDATA[K.-H.]]></given-names>
</name>
<name>
<surname><![CDATA[Cornel]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Water. Energy interactions in water reuse]]></source>
<year>2012</year>
<page-range>87-126</page-range><publisher-loc><![CDATA[London ]]></publisher-loc>
<publisher-name><![CDATA[IWA Publishing]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Limón]]></surname>
<given-names><![CDATA[J. G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Los lodos de las plantas de tratamiento de aguas residuales, ¿problema o recurso?]]></source>
<year>2013</year>
<publisher-loc><![CDATA[Guadalajara, México ]]></publisher-loc>
<publisher-name><![CDATA[Academia de Ingeniería, A. C.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Meda]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Lensh]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Schaum]]></surname>
<given-names><![CDATA[Ch.]]></given-names>
</name>
<name>
<surname><![CDATA[Cornel]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Energy and water: Relations and recovery potential]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Lazarova]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Choo]]></surname>
<given-names><![CDATA[K.-H.]]></given-names>
</name>
<name>
<surname><![CDATA[Cornel]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Water. Energy interactions in water reuse]]></source>
<year>2012</year>
<page-range>21-35</page-range><publisher-loc><![CDATA[London ]]></publisher-loc>
<publisher-name><![CDATA[International Water Association, IWA Publishing]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tchobanoglous]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Stensel]]></surname>
<given-names><![CDATA[H. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Tsuchihashi]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Burton]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<collab>Metcalf &amp; Eddy Inc.</collab>
<source><![CDATA[Wastewater engineering treatment and resource recovery]]></source>
<year>2014</year>
<edition>5</edition>
<publisher-loc><![CDATA[London ]]></publisher-loc>
<publisher-name><![CDATA[McGraw Hill Higher Education]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Monroy]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Fama]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Meraz]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Montoya]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Macarie]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Anaerobic digestion for wastewater treatment in México: State of the technology]]></article-title>
<source><![CDATA[Water Resources]]></source>
<year>2000</year>
<volume>34</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1803-16</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nolasco]]></surname>
<given-names><![CDATA[D. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Desarrollo de proyectos MDL en plantas de tratamiento de aguas residuales]]></source>
<year>2010</year>
<publisher-loc><![CDATA[Washington, DC ]]></publisher-loc>
<publisher-name><![CDATA[Banco Interamericano de Desarrollo, Sector de Infraestructura y Medio Ambiente]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Noyola]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Morgan-Sagastume]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Güereca]]></surname>
<given-names><![CDATA[L. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Selección de tecnologías para el tratamiento de aguas residuales municipales. Guía de apoyo para ciudades pequeñas y medianas]]></source>
<year>2013</year>
<publisher-loc><![CDATA[México, DF ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ingeniería]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Noyola]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Paredes]]></surname>
<given-names><![CDATA[M. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Morgan-Sagastume]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Güereca]]></surname>
<given-names><![CDATA[L. P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reduction of greenhouse gas emissions from municipal wastewater treatment in Mexico based on technology selection]]></article-title>
<source><![CDATA[Clean Soil Air Water]]></source>
<year>2016</year>
<volume>44</volume>
<numero>9</numero>
<issue>9</issue>
<page-range>1091-8</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Peña de la]]></surname>
<given-names><![CDATA[M. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Ducci]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Zamora]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
</person-group>
<source><![CDATA[Tratamiento de aguas residuales en México]]></source>
<year>2013</year>
</nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="">
<collab>Programa Mundial de Evaluación de los Recursos Hídricos de las Naciones Unidas</collab>
<source><![CDATA[Informe Mundial de las Naciones Unidas sobre el Desarrollo de los Recursos Hídricos 2017. Aguas residuales: El recurso desaprovechado.]]></source>
<year>2017</year>
</nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Cardoso]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Moeller]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Moeller]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Operación y mantenimiento de plantas de tratamiento de lodos activados. Material tecnodidáctico]]></source>
<year>2009</year>
<edition>7</edition>
<publisher-loc><![CDATA[Jiutepec, México ]]></publisher-loc>
<publisher-name><![CDATA[Secretaría de Medio Ambiente y Recursos Naturales-Instituto Mexicano de Tecnología del Agua]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ríos]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Kaltschmitt]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Electricity generation potential from biogas produced from organic waste in Mexico]]></article-title>
<source><![CDATA[Renewable and Sustainable Energy Reviews]]></source>
<year>2016</year>
<volume>54</volume>
<page-range>384-95</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="">
<collab>Secretaría de Medio Ambiente y Recursos Naturales</collab>
<collab>Instituto Nacional de Ecología y Cambio Climático</collab>
<source><![CDATA[México. Quinta Comunicación Nacional ante la Convención Marco de las Naciones Unidas sobre el Cambio Climático]]></source>
<year>2012</year>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tabasová]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Kropác]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Kermes]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Nemet]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Stehlík]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Waste-to-energy technologies: Impact on environment]]></article-title>
<source><![CDATA[Energy]]></source>
<year>2012</year>
<volume>44</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>146-55</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="">
<collab>United Nations Framework Convention on Climate Change</collab>
<source><![CDATA[Clean development mechanism CDM methodology booklet]]></source>
<year>2014</year>
<edition>6</edition>
</nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="book">
<collab>Watergy México, A. C.</collab>
<collab>Comisión de Cooperación Ecológica Fronteriza</collab>
<source><![CDATA[Auditoría de eficiencia energética en estaciones de bombeo y plantas potabilizadoras en el sistema municipal de agua y saneamiento de Nuevo Laredo, Tamaulipas. Informe Final]]></source>
<year>2014</year>
<publisher-loc><![CDATA[México, DF ]]></publisher-loc>
<publisher-name><![CDATA[Watergy México A. C., Comisión de Cooperación Ecológica Fronteriza, COCEF]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wiser]]></surname>
<given-names><![CDATA[J. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Schettler]]></surname>
<given-names><![CDATA[J. W.]]></given-names>
</name>
<name>
<surname><![CDATA[Willis]]></surname>
<given-names><![CDATA[J. L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Evaluation of combined heat and power technologies for wastewater treatment facilities]]></source>
<year>2010</year>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
