<?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>S2223-48612020000200052</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[ELIMINACIÓN SIMULTÁNEA DE CONTAMINANTES EN FASE GASEOSA Y LÍQUIDA MEDIANTE BIOFILTRACIÓN]]></article-title>
<article-title xml:lang="en"><![CDATA[CONTAMINANTS IN GAS AND LIQUID PHASE SIMULTANEOUS ELIMINATION BY BIOFILTRATION]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Díaz Rodríguez]]></surname>
<given-names><![CDATA[Yuletsis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salgado González]]></surname>
<given-names><![CDATA[Liliana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Contrera Aviléz]]></surname>
<given-names><![CDATA[Rosa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González Hernández]]></surname>
<given-names><![CDATA[Leira]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gonzáles Hernández]]></surname>
<given-names><![CDATA[Francisca]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Toledo León]]></surname>
<given-names><![CDATA[Heidy]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Investigación del Petróleo (CEINPET)  ]]></institution>
<addr-line><![CDATA[Cerro La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<volume>47</volume>
<numero>2</numero>
<fpage>52</fpage>
<lpage>62</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2223-48612020000200052&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2223-48612020000200052&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2223-48612020000200052&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción:  La biofiltración de gases sobre lecho fijo orgánico funciona como filtro natural con alta porosidad y propiedades de sorción. Por una parte, retiene los contaminantes por procesos físico químicos y por otra sirve de soporte para el crecimiento de microorganismos degradadores. La aplicación de mezclas complejas como lodos activos para inoculación de biofiltros, resulta más conveniente que el empleo de especies aisladas. Con ello se garantiza un medio de cultivo favorable para el desarrollo de microorganismos, que cierran los ciclos biogeoquímicos de elementos como azufre, carbono, nitrógeno y fósforo. Sin embargo, pueden surgir problemas en cuanto a las regulaciones para el vertimiento del efluente a fin de preservar la calidad de las aguas terrestres receptoras.  Objetivo:  Evaluar la calidad del efluente residual de un sistema de tratamiento biológico de gas natural  Materiales y Métodos:  Para ello se determinaron parámetros químicos y microbiológicos según normas (APHA-AWWA-WEF, 2005) e ISO.  Resultados y Discusión:  Se demostró que existe un crecimiento de bacterias y hongos degradadores de H2S(g) del gas natural de 6,0·108 UFC.mL-1; y se corroboró que existe un aumento gradual de la concentración de sulfato de 20,4 a 867,51 mg.L-1, como producto de esa degradación.  Conclusiones:  Se observó una fuerte correlación entre el desarrollo bacteriano y la disminución del contenido de nitrógeno en el sistema y fue posible remover en el efluente otros indicadores de contaminación tales como coliformes fecales, DQO, DBO y sólidos sedimentables, con el fin de mejorar la calidad del vertimiento.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction:  Gas biofiltration in an organic fixed bed works as a natural filter with high porosity and sorption properties. It retains contaminants by physical-chemical processes and on the other hand, it supports the growth of degrading microorganisms. Complex mixtures such as active sludge application for biofilters inoculation is more convenient than the isolated species use. This guarantees a favorable culture medium for microorganisms development, which close biogeochemical cycles of elements such as sulfur, carbon, nitrogen and phosphorus. However, problems may arise with regard to effluent discharge regulations in order to preserve quality of receiving ground waters.  Objective:  To evaluate the quality of a residual effluent from biological treatment system of natural gas.  Materials and Methods:  Chemical and microbiological parameters were determined according to the (APHA-AWWA-WEF, 2005) and ISO standards.  Results and Discussion:  It was demonstrated that there is a growth of bacteria and fungi degraders of H2S (g) of natural gas of 6.0·108 CFU.mL-1; and it was corroborated that there is a gradual increase in sulphate concentration from 20.4 to 867.51 mg.L-1, as a result of this degradation  Conclusions:  A strong correlation between the bacterial development and the decrease of nitrogen content in the system was observed; and it was possible to remove other pollution indicators as fecal coliforms, COD, BOD and sedimentable solids in effluent, in order to improve discharge quality.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[biofiltración]]></kwd>
<kwd lng="es"><![CDATA[contaminación]]></kwd>
<kwd lng="es"><![CDATA[efluente]]></kwd>
<kwd lng="es"><![CDATA[gas natural]]></kwd>
<kwd lng="en"><![CDATA[biofiltration]]></kwd>
<kwd lng="en"><![CDATA[contamination]]></kwd>
<kwd lng="en"><![CDATA[effluent]]></kwd>
<kwd lng="en"><![CDATA[natural gas]]></kwd>
</kwd-group>
</article-meta>
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