<?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>2223-4861</journal-id>
<journal-title><![CDATA[Centro Azúcar]]></journal-title>
<abbrev-journal-title><![CDATA[cen. az.]]></abbrev-journal-title>
<issn>2223-4861</issn>
<publisher>
<publisher-name><![CDATA[Editorial Feijóo]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2223-48612021000300108</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[PRETRATAMIENTO DE BIOMASAS LIGNOCELULÓSICAS: BREVE REVISIÓN DE LOS PRINCIPALES MÉTODOS UTILIZADOS]]></article-title>
<article-title xml:lang="en"><![CDATA[PRETREATMENT OF LIGNOCELLULOSIC BIOMASS: A BRIEF REVIEW OF THE PRINCIPAL METHODS APPLIED]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Espinosa Negrín]]></surname>
<given-names><![CDATA[Ana María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López González]]></surname>
<given-names><![CDATA[Lisbet Mailín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Casdelo Gutiérrez]]></surname>
<given-names><![CDATA[Neibys Lourdes]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Sancti Spíritus &#8220;José Martí Pérez&#8221; (UNISS) Centro de Estudios de Energía y Procesos Industriales (CEEPI) ]]></institution>
<addr-line><![CDATA[Sancti Spíritus ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Central &#8220;Marta Abreu&#8221; de Las Villas Facultad de Química y Farmacia Departamento de Licenciatura en Química]]></institution>
<addr-line><![CDATA[Santa Clara Villa Clara]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<volume>48</volume>
<numero>3</numero>
<fpage>108</fpage>
<lpage>119</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2223-48612021000300108&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2223-48612021000300108&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2223-48612021000300108&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción: El crecimiento de la demanda energética a nivel global resulta en numerosos desafíos medio ambientales y en el déficit energético. En este contexto la utilización de biomasa constituye una vía prometedora para la producción de energía vía digestión anaerobia, con la inclusión de una etapa de pretratamiento.  Objetivo: Presentar una revisión sobre los principales métodos de pretratamiento reportados para mejorar la producción de biogás a partir de materiales lignocelulósicos, así como un acercamiento a métodos basados en solventes limpios.  Materiales y Métodos: Se utilizaron como medios para la revisión tesis de doctorado y artículos de investigación donde se emplean técnicas de pretratamiento, así como revisiones publicadas anteriormente sobre el tema.  Resultados y Discusión: Se describen los resultados reportados por diferentes autores en el uso de pretratamientos, considerándose como aspectos fundamentales la variación en la estructura y del rendimiento de metano, que puede ser muy diferente de una biomasa a otra al emplear condiciones similares. La formación de compuestos inhibitorios es más probable cuando se emplean los pretratamientos con explosión de vapor y ácidos, o al trabajar en condiciones severas de temperatura y tiempo. Métodos basados en solventes limpios incrementan la eliminación de lignina por lo que son prometedores para la producción de biogás.  Conclusiones: La inclusión de una etapa de pretratamiento previa a un proceso de digestión anaerobia permite obtener mejores rendimientos de metano, siempre que se haga una buena selección de los parámetros del proceso.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction: The growth of global energy demand results in numerous environmental challenges and an energy deficit. In this context the biomass use ois a promising way to produce sustainable energy through anaerobic digestion with pretreatment stage included.  Objective: To present a summary of the main pretreatment methods reported to improve biogas production from lignocellulosic materials, as well as an approach on clean solvent-based methods.  Materials and Methods: The main used sources were doctoral thesis and research articles where pre-treatment techniques were used, as well as published previously reviews about this topic.  Results and Discussion: The results reported by different authors in the use of pre-treatments are described, considering as fundamental aspects the variation in the structure and methane yield, which can be different between dissimilar biomass using similar conditions. The formation of inhibitory compounds is more likely when steam explosion and acid pre-treatments are used, or when it is working under severe temperature and time conditions. Clean solvent-based methods increase lignin removal and are therefore promising for biogas production.  Conclusions: The inclusion of a pre-treatment stage prior to anaerobic digestion process allows to obtain better methane yields, if a good process selection parameters is made.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[biogás]]></kwd>
<kwd lng="es"><![CDATA[digestión anaerobia]]></kwd>
<kwd lng="es"><![CDATA[pretratamiento]]></kwd>
<kwd lng="en"><![CDATA[biogas]]></kwd>
<kwd lng="en"><![CDATA[anaerobic digestion]]></kwd>
<kwd lng="en"><![CDATA[pretreatment]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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