<?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>0123-3033</journal-id>
<journal-title><![CDATA[Ingeniería y competitividad]]></journal-title>
<abbrev-journal-title><![CDATA[Ing. compet.]]></abbrev-journal-title>
<issn>0123-3033</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Ingeniería, Universidad del Valle]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0123-30332023000100018</article-id>
<article-id pub-id-type="doi">10.25100/iyc.v25i1.12109</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Determination of biokinetic coefficients of an aerobic system for potato starch removal]]></article-title>
<article-title xml:lang="es"><![CDATA[Determinación de los coeficientes biocinéticos de un sistema aerobio para remoción de almidón de papa]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Londoño-Cañas,]]></surname>
<given-names><![CDATA[Yudy Andrea]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodriguez-Saldarriaga]]></surname>
<given-names><![CDATA[Paola]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arcila-Sáenz]]></surname>
<given-names><![CDATA[Jennifer]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Peñuela]]></surname>
<given-names><![CDATA[Gustavo A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,University of Antioquia Faculty of Engineering ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2023</year>
</pub-date>
<volume>25</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0123-30332023000100018&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0123-30332023000100018&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0123-30332023000100018&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This study presents the performance of a laboratory scale completely mixed aerobic reactor for starch wastewater treatment. The reactor was operated for 119 days, divided into 5 operational phases which included the start-up and the variation of cell-residence time. In order to determine the biokinetic coefficients for starch removal, the cell-residence time was varied between 20 to 4 days, and the system operation was set to a hydraulic retention time of 24 hours with a completely mixed reactor setup. The chemical oxygen demand concentration was 1000mg/L in the inflow of the reactor and dissolved oxygen remained above 2mg/L. In this experimentation time, the parameters such as pH, chemical oxygen demand (in the influent and effluent), dissolved oxygen and mixed liquor suspended solids were monitored. The calculation of biokinetic constants was done by an approximate method, using the graphical Lineweaver-Burk method. The biokinetic coefficients determined were for maximum substrate removal rate (&#119896;0), half saturation rate constant or affinity constant (&#119896;&#119898;), sludge yield coefficient (Y), and microbial decay or indigenous respiration rate (&#119896;&#119890;). The results showed that Y, (&#119896;0), and (&#119896;&#119898;), were in the range of 0.3- 0.7 mgSSV/mgBOD5, 2- 8 day1 and 40-120 mg/L (COD- BOD5), respectively. Values of the coefficients were within the range of those reported for conventional activated sludge processes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Este estudio presenta el rendimiento de un reactor aerobio completamente mezclado, a escala de laboratorio, para el tratamiento de aguas residuales provenientes de la extracción de almidón de papa. El reactor se operó durante 119 días divididos en 5 fases de operación que incluyeron la puesta en marcha y la variación del tiempo de retención celular. Con el fin de determinar los coeficientes biocinéticos, el tiempo de retención celular se varió entre 20 y 4 días, y el funcionamiento del sistema se estableció con tiempo de retención hidráulica de 24 horas a una configuración hidráulica de mezcla completa. La concentración de demanda química de oxígeno fue de 1000 mg/ en la entrada del reactor y el oxígeno disuelto permaneció por encima de 2 mg/L. En este tiempo de experimentación se monitorearon parámetros como pH, demanda química de oxígeno (en el afluente y efluente), oxígeno disuelto y sólidos suspendidos del licor de mezcla. El cálculo de las constantes biocinéticas se realizó mediante un método aproximado, utilizando el método gráfico Lineweaver-Burk. Los coeficientes biocinéticos determinados fueron: La tasa máxima de remoción de sustrato (&#119896;0), la tasa media de saturación o constante de afinidad (&#119896;&#119898;), el coeficiente de rendimiento de lodo (Y) y la tasa de respiración endógena (&#119896;&#119890;). Los resultados mostraron que Y, (&#119896;0), y (&#119896;&#119898;), estuvieron en un rango de 0,3- 0,7 mgSSV/mgBOD5, 2- 8 1/día y 40-120 mg/L (COD- BOD5), respectivamente. Estos valores de los coeficientes estuvieron en el rango de los coeficientes reportados en la literatura en el tratamiento convencional de lodos activados empleados para el tratamiento de residual doméstica.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Biological processes]]></kwd>
<kwd lng="en"><![CDATA[Bioremediation]]></kwd>
<kwd lng="en"><![CDATA[Starch removal]]></kwd>
<kwd lng="en"><![CDATA[Water treatment]]></kwd>
<kwd lng="es"><![CDATA[Biotecnología]]></kwd>
<kwd lng="es"><![CDATA[Bioremediación]]></kwd>
<kwd lng="es"><![CDATA[Remoción de almidón]]></kwd>
<kwd lng="es"><![CDATA[Tratamiento de agua]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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