<?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>1692-3324</journal-id>
<journal-title><![CDATA[Revista Ingenierías Universidad de Medellín]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. ing. univ. Medellín]]></abbrev-journal-title>
<issn>1692-3324</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Medellín]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1692-33242014000200002</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Tratamiento de lodos generados en el proceso convencional de potabilización de agua]]></article-title>
<article-title xml:lang="en"><![CDATA[Treatment of waterworks sludge from conventional process to drinking water]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez-Rosero]]></surname>
<given-names><![CDATA[Johnatan Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Fajardo]]></surname>
<given-names><![CDATA[Álvaro Ignacio]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rivas]]></surname>
<given-names><![CDATA[Rodrigo]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Linares]]></surname>
<given-names><![CDATA[Balmes]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Paredes]]></surname>
<given-names><![CDATA[Diego]]></given-names>
</name>
<xref ref-type="aff" rid="A05"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Tecnológica de Pereira  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad Tecnológica de Pereira  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Grupo de Investigación Aguas & Aguas de Pereira  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A04">
<institution><![CDATA[,Grupo de Investigación Aguas & Aguas de Pereira  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A05">
<institution><![CDATA[,Universidad Tecnológica de Pereira  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2014</year>
</pub-date>
<volume>13</volume>
<numero>25</numero>
<fpage>13</fpage>
<lpage>27</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S1692-33242014000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S1692-33242014000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S1692-33242014000200002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Se investigaron los lodos aluminosos del proceso de sedimentación de una planta convencional de potabilización de agua sometidos a ensayos de recuperación de aluminio, adicionando H2SO4, sedimentabilidad y espesamiento. Utilizando H2SO4, se recuperó el 60-70 % de la concentración inicial del aluminio en el lodo, con pH=1,5 Und. y mezcla de 5-30 minutos. Para los ensayos de sedimentabilidad y espesamiento se utilizaron los polímeros Nalclear 8173 y Trafloc 496. Se obtuvieron remociones significativas para SST y turbiedad en la sedimentabilidad con un nivel de significancia de 0,05; no hubo diferencias significativas entre los polímeros; la dosis que presentó eficiencias de remoción significativas fue 10 mg/L. En el espesamiento, la adición de Trafloc y el factor tiempo influyeron significativamente sobre las eficiencias de remoción de DQO, DBO, SST y turbiedad; no hubo diferencias significativas entre las dosis de polímero utilizadas. La sedimentabilidad presentó mejores condiciones técnicas para el tratamiento de los lodos ensayados.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Waterworks sludge from sedimentation process in conventional drinking water treatment plant, recovery tests under aluminum adding H2SO4, thickening and settling properties were investigated. Using H2SO4, was recovered 60-70% of the initial concentration of aluminum in the sludge, and pH=1.5 Und mixture 5-30 minutes. For testing the settleability and thickening Nalclear 8173 and Trafloc 496 polymers were used. With a significance level of 0.05, the settling properties significant for SST and turbidity removal was obtained; there were no significant differences between the polymers; dose efficiencies presented significant removal was 10 mg/L. In thickening, adding Trafloc and the time factor influenced significantly on removal efficiencies of COD, BOD, TSS and turbidity; there were no significant differences between the doses of polymer used. The settleability provided best technical conditions for the treatment of sludge tested.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[lodos de PTAP]]></kwd>
<kwd lng="es"><![CDATA[recuperación de aluminio]]></kwd>
<kwd lng="es"><![CDATA[polímeros]]></kwd>
<kwd lng="es"><![CDATA[sedimentabilidad]]></kwd>
<kwd lng="es"><![CDATA[espesamiento]]></kwd>
<kwd lng="en"><![CDATA[waterworks sludge]]></kwd>
<kwd lng="en"><![CDATA[aluminum recovery]]></kwd>
<kwd lng="en"><![CDATA[polymers]]></kwd>
<kwd lng="en"><![CDATA[settleability]]></kwd>
<kwd lng="en"><![CDATA[thickening]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  ]]></body><back>
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