<?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>0034-7744</journal-id>
<journal-title><![CDATA[Revista de Biología Tropical]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. biol. trop]]></abbrev-journal-title>
<issn>0034-7744</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-77442017000401527</article-id>
<article-id pub-id-type="doi">10.15517/rbt.v65i4.26509</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Isolation of ammonium- and nitrite-oxidizing bacterial strains from soil, and their potential use in the reduction of nitrogen in household waste water]]></article-title>
<article-title xml:lang="es"><![CDATA[Aislamiento de cepas bacterianas oxidantes de amonio y nitrito del suelo y su uso potencial en la reducción de nitrógeno en las aguas residuales domésticas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[RodríguezRodríguez]]></surname>
<given-names><![CDATA[Abad]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[MauInchaustegui]]></surname>
<given-names><![CDATA[Silvia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[PiedraCastro]]></surname>
<given-names><![CDATA[Lilliana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[JiménezMontealegre]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[HerreraVargas]]></surname>
<given-names><![CDATA[JuanPablo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional  ]]></institution>
<addr-line><![CDATA[ Heredia]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional  ]]></institution>
<addr-line><![CDATA[ Heredia]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional  ]]></institution>
<addr-line><![CDATA[ Heredia]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional  ]]></institution>
<addr-line><![CDATA[ Heredia]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Nacional  ]]></institution>
<addr-line><![CDATA[ Heredia]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<volume>65</volume>
<numero>4</numero>
<fpage>1527</fpage>
<lpage>1539</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0034-77442017000401527&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0034-77442017000401527&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0034-77442017000401527&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Currently, nitrogen has become the main element of water pollution, causing riverine, lacustrine and coastal eutrophication. The continuous contamination of aquifers and the absence of planned water resource utilization, boost its scarcity, and has been the only way in which our societies become aware of the urgent need to process the generated wastewater. The objective of this research was to evaluate the nitrifying capacity of different autochthonous bacterial isolates from soils from nearby sources of domestic wastewater drainage. For this, bacteria were isolated from Pirro River, contaminated with nitrogen of domestic sewage. Nitrifying bacteria were counted by serial dilution and agar plates, and were isolated until obtaining axenic colonies. These were identified by biochemical batteries or genetic sequencing, and the quantification of their nitrifying capacity was obtained by the methods 4500- NH4 + -F and 4500-NO-2-B, all between September 26, 2011 and March 16, 2014. A total of seven strains of nitrifying microorganisms were isolated and purified, including four Streptomyces sp., one Pseudomonas putida, one Sphingomonas sp. and one Aeromonas sp. We found that there were 2.23 x 105 UFC/g of soil of ammonium oxidizing bacteria and 2.2 x 104 CFU/g of soil of nitrite oxidizing bacteria in the samples. The quantification of the nitrifying capacity of the strains by colorimetric methods, determined that the maximum ammonium removal capacity was 0.050 mg N/L/day and 0.903 mg N/L/day of nitrite. The collection of few strains of nitrifying organisms and a low CFU count, can be attributed to the technique used, since this only recovers 1 % of the microorganisms present in a sample, which, however, is acceptable for studies which main purpose is to obtain cultivable microorganisms. Future research should consider removal tests with higher ammonium and nitrite levels, to find the maximum capacity of the isolated microorganisms, and evaluate their potential use in wastewater treatment systems.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El suelo es la matriz fundamental donde suceden las reacciones químicas y biológicas que permiten el desarrollo de la vida en la tierra, y donde ocurren procesos fundamentales como la mineralización de los elementos y la fijación del nitrógeno. Hoy en día el nitrógeno se ha transformado en uno de los principales elementos contaminantes de los cuerpos de agua, causando consecuencias como la eutrofización de ríos, lago y costas. En los ambientes acuáticos, el nitrógeno puede ser encontrado en forma de amonio N-NH4 +, nitritos N-NO2 -o nitratos N-NO3 -, los cuales pueden ser utilizados por las bacterias nitrificantes amonio y nitrito oxidantes y desnitrificantes para su crecimiento y consecuente remoción. Esta investigación se planteó como objetivo evaluar la capacidad nitrificante de diferentes aislamientos bacterianos autóctonos, aislados de suelos cercanos a fuentes de vertido de aguas residuales de tipo doméstico para su potencial uso en sistemas de tratamiento de aguas residuales. Se realizó el recuento de bacterias nitrificantes por la técnica de dilución seriada y siembra en placas de agar mínimo mineral, su aislamiento por repique en placa hasta obtener colonias axénicas, su identificación por medio de baterías bioquímicas o secuenciación genética y la cuantificación de su capacidad nitrificante por los métodos 4500- NH4 +-F y 4500- NO- 2-B, entre el 26/09/2011 y 16/03/2014; las bacterias fueron aisladas de un punto del río Pirro contaminado con nitrógeno de aguas residuales de tipo doméstico. Se lograron aislar y purificar siete cepas de microorganismos nitrificantes entre las que se encuentran cuatro de Streptomyces sp., una de Pseudomonas putida, una de Sphingomonas sp. y una de Aeromonas sp. Se encontró que existen 2.23 x105 UFC/g de suelo de bacterias amonio oxidantes y 2.2 x104 UFC/g de suelo de las nitrito oxidantes. La cuantificación de la capacidad nitrificante de las cepas por medio de los métodos colorimétricos determinó que la capacidad máxima de remoción de amonio es de 0.050 mg N/L/día y la de nitrito en 0.903 mg N/L/día. La obtención de pocas cepas de organismos nitrificantes y un bajo recuento de UFC se puede atribuir a la técnica empleada, ya que esta solo recupera un 1 % de los microorganismos presentes en una muestras, lo cual sin embargo, es aceptable para estudios que tienen como objetivo la obtención de microorganismos cultivables. Se recomienda realizar ensayos de remoción con niveles de amonio y nitrito más altos para hallar la capacidad máxima de los microorganismos aislados.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[nitrification]]></kwd>
<kwd lng="en"><![CDATA[AOB]]></kwd>
<kwd lng="en"><![CDATA[NOB]]></kwd>
<kwd lng="en"><![CDATA[soil]]></kwd>
<kwd lng="en"><![CDATA[bacterial isolation]]></kwd>
<kwd lng="en"><![CDATA[removal]]></kwd>
<kwd lng="es"><![CDATA[nitrificación]]></kwd>
<kwd lng="es"><![CDATA[BAO]]></kwd>
<kwd lng="es"><![CDATA[BNO]]></kwd>
<kwd lng="es"><![CDATA[suelo]]></kwd>
<kwd lng="es"><![CDATA[aislamiento bacteriano]]></kwd>
<kwd lng="es"><![CDATA[remoción]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Benavides]]></surname>
<given-names><![CDATA[J. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Quintero]]></surname>
<given-names><![CDATA[G. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Ostos]]></surname>
<given-names><![CDATA[O. L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Aislamiento e identificación de diez cepas bacterianas desnitrificantes a partir de un suelo agrícola contaminado con abonos nitrogenados proveniente de una finca productora de cebolla en la Laguna de Tota, Boyacá, Colombia]]></article-title>
<source><![CDATA[Nova-Publicación Científica]]></source>
<year>2006</year>
<volume>4</volume>
<page-range>50-4</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bitton]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Wastewater microbiology]]></source>
<year>2005</year>
<edition>3rd</edition>
<publisher-loc><![CDATA[New Jersey, USA ]]></publisher-loc>
<publisher-name><![CDATA[Wiley-Liss]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cervantes]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Gómez]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Avances en la eliminación biológica del nitrógeno de las aguas residuales]]></article-title>
<source><![CDATA[Revista Latinoamericana de Microbiología]]></source>
<year>2000</year>
<volume>42</volume>
<page-range>73-82</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Coleman]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Crossley]]></surname>
<given-names><![CDATA[C. D. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Hendrix]]></surname>
<given-names><![CDATA[P. F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Fundamentals of soil ecology]]></source>
<year>2004</year>
<edition>2nd</edition>
<publisher-loc><![CDATA[California, USA ]]></publisher-loc>
<publisher-name><![CDATA[Elsevier Academic Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Constantine]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[An overview of Ammonia and Nitrogen removal in wastewater treatment]]></source>
<year>2008</year>
<publisher-loc><![CDATA[Canada ]]></publisher-loc>
<publisher-name><![CDATA[CH2M HILL]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Eaton]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Clesceri]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Greenberg]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Standard methods for the examination of water and wastewater]]></source>
<year>1995</year>
<edition>19th</edition>
<publisher-loc><![CDATA[Washington, DC ]]></publisher-loc>
<publisher-name><![CDATA[American Health Association]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Eldor]]></surname>
<given-names><![CDATA[A. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil microbiology, ecology and biochemistry]]></source>
<year>2007</year>
<edition>3rd</edition>
<publisher-loc><![CDATA[Miami, FL ]]></publisher-loc>
<publisher-name><![CDATA[Elsevier Academic Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Essington]]></surname>
<given-names><![CDATA[M. E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Soil and Water Chemistry]]></article-title>
<source><![CDATA[An integrative Approach]]></source>
<year>2004</year>
<publisher-loc><![CDATA[Florida, USA ]]></publisher-loc>
<publisher-name><![CDATA[CRC Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fiencke]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Spieck]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Bock]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nitrifying Bacteria]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Werner]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Newton]]></surname>
<given-names><![CDATA[W. E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Nitrogen fixation in Agriculture, Forestry, Ecology, and the Environment]]></source>
<year>2005</year>
<page-range>255-76</page-range><publisher-loc><![CDATA[Netherlands ]]></publisher-loc>
<publisher-name><![CDATA[Springer]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Garza]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Mata]]></surname>
<given-names><![CDATA[J. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Barbosa]]></surname>
<given-names><![CDATA[L. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Aislamiento y caracterización biodegradativa de microorganismos presentes en un lodo anaerobio]]></source>
<year>2001</year>
<publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Autónoma de Coahuila]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Helmer]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Hespanhol]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<source><![CDATA[Water Pollution Control: A guide to the use of water quality management principles]]></source>
<year>1997</year>
<publisher-loc><![CDATA[London, UK ]]></publisher-loc>
<publisher-name><![CDATA[UNESCO/WHO/UNEP]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hu]]></surname>
<given-names><![CDATA[B. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Zheng]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Wu]]></surname>
<given-names><![CDATA[X. Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Yin]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Identification of ammonia oxidation Streptomyces strain A2 and study of its autotrophic ammonium oxidation characteristics]]></article-title>
<source><![CDATA[Act of Clinical Microbiology]]></source>
<year>2005</year>
<volume>45</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>321-4</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jarpa]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Aguilar]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Belmonte]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Decap]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Abarzúa]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Vidal]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Determinación de la capacidad nitrificante de un sedimento marino proveniente de un centro de cultivo de salmones]]></article-title>
<source><![CDATA[Interciencia]]></source>
<year>2007</year>
<volume>32</volume>
<page-range>679-85</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="">
<collab>Kanehisa Laboratories</collab>
<source><![CDATA[Kegg Pathway: Nitrogen metabolism: Aeromonas hydrophila subsp. hydrophila ATCC 7966]]></source>
<year>2013</year>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="">
<collab>Kanehisa Laboratories</collab>
<source><![CDATA[Kegg Pathway. Nitrogen metabolism: Sphingomonas wittichii]]></source>
<year>2013</year>
</nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Madigan]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Martinko]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Dunlap]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Clark]]></surname>
<given-names><![CDATA[P. V. D. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Brock Biología de los Microorganismos]]></source>
<year>2009</year>
<edition>12th</edition>
<publisher-loc><![CDATA[Madrid, Spain ]]></publisher-loc>
<publisher-name><![CDATA[Pearson Education]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Moat]]></surname>
<given-names><![CDATA[A. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Foster]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Spector]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Microbial Physiology]]></source>
<year>2002</year>
<edition>4th</edition>
<publisher-loc><![CDATA[New York, USA ]]></publisher-loc>
<publisher-name><![CDATA[Wiley-Liss]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mohan]]></surname>
<given-names><![CDATA[S. B.]]></given-names>
</name>
<name>
<surname><![CDATA[Schmid]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Jetten]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Cole]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Detection and widespread distribution of the nrfA gene encoding nitrite reduction to ammonia, a short circuit in the biological nitrogen cycle that competes with denitrification]]></article-title>
<source><![CDATA[FEMS Microbiology Ecology]]></source>
<year>2004</year>
<volume>49</volume>
<page-range>433-43</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Obaton]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Amarger]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Alexander]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Heterotrophic nitrification by Pseudomonas aeruginosa]]></article-title>
<source><![CDATA[Archives of Microbiology]]></source>
<year>1968</year>
<volume>63</volume>
<page-range>122-32</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Okpokwasili]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Eleke]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of antimicrobial agents on the activity and survival of Aeromonas hydrophila and nitrifying bacteria in vitro]]></article-title>
<source><![CDATA[Journal of Natural Science Council of Sri Lanka]]></source>
<year>1997</year>
<volume>25</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>231-40</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Park]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[Nam]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Kim]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Anaerobic ammonia-oxidation coupled with Fe3+ reduction by an anaerobic culture from a piggery wastewater acclimated to NH4+/Fe3+ medium]]></article-title>
<source><![CDATA[Biotechnology and Bioprocess Engineering]]></source>
<year>2009</year>
<volume>14</volume>
<page-range>680-5</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Spieck]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Bock]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Proteobacteria, Part Introductory Essays]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Garrity]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[The lithoautotrophic nitrite-oxidizing bacteria. Bergey&#8217;s Manual of Systematic Bacteriology]]></source>
<year>2005</year>
<page-range>149-53</page-range><publisher-loc><![CDATA[New York, USA ]]></publisher-loc>
<publisher-name><![CDATA[Springer]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Templeton]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Butler]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Introduction to Wastewater Treatment]]></source>
<year>2011</year>
<publisher-loc><![CDATA[UK ]]></publisher-loc>
<publisher-name><![CDATA[Imperial college London and University of Exeter, Ventus Publishing Aps]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wehrfritz]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Carter]]></surname>
<given-names><![CDATA[J. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Spiro]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Richardson]]></surname>
<given-names><![CDATA[D. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Hydroxylamine oxidation in heterotrophic nitrate-reducing soil bacteria and purification of a hydroxylamine-cytochrome c oxidoreductase from a Pseudomonas species]]></article-title>
<source><![CDATA[Archives of Microbiology]]></source>
<year>1997</year>
<volume>166</volume>
<page-range>421-4</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Werner]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Newton]]></surname>
<given-names><![CDATA[W. E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Nitrogen fixation in Agriculture, Forestry, Ecology and the Environment]]></source>
<year>2005</year>
<publisher-loc><![CDATA[Netherlands ]]></publisher-loc>
<publisher-name><![CDATA[Springer]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Witzel]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Overbeck]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Heterotrophic nitrification by Arthrobacter sp. (strain 9006) as influenced by different cultural conditions, growth state and acetate metabolism]]></article-title>
<source><![CDATA[Archives of Microbiology]]></source>
<year>1979</year>
<volume>122</volume>
<page-range>137-43</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Wu]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Hao]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Yu]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Heterotrophic nitrification and aerobic denitrification by the bacterium Pseudomonas stutzeri YZN-001]]></article-title>
<source><![CDATA[Bioresource Technology]]></source>
<year>2011</year>
<volume>102</volume>
<page-range>9866-9</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
