<?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>S2007-24222021000200327</article-id>
<article-id pub-id-type="doi">10.24850/j-tyca-2021-02-07</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Modelación de desnitrificación usando sustratos sólidos orgánicos naturales como fuentes de carbono]]></article-title>
<article-title xml:lang="en"><![CDATA[Denitrification modeling using natural organic solid substrates as carbon sources]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Deago-De-León]]></surname>
<given-names><![CDATA[Euclides Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Tecnológica de Panamá Centro de Investigaciones Hidráulicas e Hidrotécnicas ]]></institution>
<addr-line><![CDATA[Panamá ]]></addr-line>
<country>Panamá</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2021</year>
</pub-date>
<volume>12</volume>
<numero>2</numero>
<fpage>327</fpage>
<lpage>378</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-24222021000200327&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-24222021000200327&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-24222021000200327&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En los últimos años se han estudiado sustratos sólidos orgánicos naturales (SSON) como fuentes de carbono económicas y seguras para su uso en la desnitrificación del agua. Aunque los resultados de desnitrificación con SSON han sido satisfactorios, aún es limitada la información de los procesos que intervienen en la interfaz SSON-biopelícula. Con el objetivo de comprender dichos procesos, desarrollamos un modelo matemático unidimensional de desnitrificación en contragradiente, con el cual evaluamos el comportamiento de la biopelícula adherida al SSON y su efecto en la liberación del carbono; transporte y consumo de carbono; transporte y consumo de nitrato. Para tal fin, se usó Saccharum spontaneum L. como SSON de referencia, de la cual se tienen parámetros biocinéticos y de hidrólisis generados en estudios previos de desnitrificación. En este artículo se presentan los resultados de la modelación matemática de desnitrificación con SSON como fuentes de carbono, lo cual se simuló con el programa AQUASIM. Los supuestos y simplificaciones definidas permitieron predecir teóricamente la desnitrificación en reactores batch y completamente mezclado con flujo. Las mejores simulaciones del estudio se obtuvieron en condiciones con desprendimiento de biopelícula, donde la desnitrificación fue superior al 80 %. Los parámetros más significativos de esta modelación matemática fueron el rendimiento neto de bacterias (Yh) y la hidrólisis (kh). Estos hallazgos demuestran la importancia de plantear modelos conceptuales y matemáticos de desnitrificación usando SSON. Este estudio sería una primera aproximación de un modelo matemático de desnitrificación en contragradiente usando a los SSON como fuente de carbono y portador de biopelícula.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In recent years, Natural Organic Solid Substrates (NOSS) have been studied as economical and safe carbon sources for use in water denitrification. Although the denitrification results with NOSS have been satisfactory, the information of the processes involved in the NOSS-biofilm interface is still limited. To understand these processes, we developed a one-dimensional mathematical model of counter-graduate denitrification, with which we evaluated: the behavior of the biofilm adhered to NOSS and its effect on carbon release; transport and consumption of carbon; and transport and consumption of nitrate. For this purpose, Saccharum Spontaneum L. was used as a reference NOSS, of which biokinetic and hydrolysis parameters were generated in previous denitrification studies. This paper presents the results of the mathematical modeling of denitrification, with NOSS as carbon sources, which was simulated with the AQUASIM program. The assumptions and simplifications defined allowed the theoretical prediction of denitrification in batch reactors and completely mixed with flow. The best simulations of the study were obtained under biofilm detachment conditions, where denitrification was greater than 80%. The most significant parameters of this mathematical modeling were the net yield of bacteria (Yh) and hydrolysis (kh ). These findings demonstrate the importance of posing conceptual and mathematical models of denitrification using NOSS. This study would be a first approximation of a mathematical model of counter-graduate denitrification, using NOSS as a carbon source and biofilm carrier.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[modelación matemática]]></kwd>
<kwd lng="es"><![CDATA[desnitrificación]]></kwd>
<kwd lng="es"><![CDATA[biopelícula]]></kwd>
<kwd lng="es"><![CDATA[contragradiente]]></kwd>
<kwd lng="es"><![CDATA[sustrato sólido orgánico natural]]></kwd>
<kwd lng="en"><![CDATA[Mathematical modeling]]></kwd>
<kwd lng="en"><![CDATA[denitrification]]></kwd>
<kwd lng="en"><![CDATA[biofilm]]></kwd>
<kwd lng="en"><![CDATA[counter-gradient]]></kwd>
<kwd lng="en"><![CDATA[natural organic solid substrates]]></kwd>
</kwd-group>
</article-meta>
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