<?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>2224-6185</journal-id>
<journal-title><![CDATA[Tecnología Química]]></journal-title>
<abbrev-journal-title><![CDATA[RTQ]]></abbrev-journal-title>
<issn>2224-6185</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Oriente]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2224-61852021000100141</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Digestión anaerobia del residuo del secado del arroz en sistema semicontinuo]]></article-title>
<article-title xml:lang="en"><![CDATA[Anaerobic digestion of the rice drying residue in semicontinuous regime]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-González]]></surname>
<given-names><![CDATA[Lisbet Mailin]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zayas-González]]></surname>
<given-names><![CDATA[Mildre]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pedraza-Garciga]]></surname>
<given-names><![CDATA[Julio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Sancti Spíritus &#8220;José Martí Pérez&#8221; Centro de Estudios de Energía y Procesos Industriales ]]></institution>
<addr-line><![CDATA[Sancti Spíritus ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Ciego de Ávila &#8220;Máximo Gómez Báez&#8221; Facultad de Agronomía Departamento de Procesos Agroindustriales]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</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>41</volume>
<numero>1</numero>
<fpage>141</fpage>
<lpage>156</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2224-61852021000100141&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2224-61852021000100141&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2224-61852021000100141&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN En el presente trabajo se evaluó el proceso de monodigestión anaerobia del residuo del secado de arroz (RS) y su codigestión con residuo vacuno (RV) y porcino (RP) en sistema semicontinuo. El estudio se realizó a escala de laboratorio en un reactor de tanque agitado en régimen mesofílico (37 ºC). La carga orgánica volumétrica (COV) se incrementó de 0,5 a 3,0g SV/Ld enmonodigestión, y luego se mantuvo a 3 g SV/Ld en el estudio en codigestión para las mezclas RS96:RV2:RP2, RS94:RV4:RP2 yRS92:RV6:RP2 (en base al % de sólidos volátiles en la mezcla). El mejor rendimiento de biogás se obtuvo durante la codigestión para la mezcla RS92:RV6:RP2 con un valor de 705,48 L/kgSV y una productividad de 2,42 LBiogás/LReactor para COV de 3 g SV/Ld. Su valor fue superior en un 28 % al del RS en monodigestión. Los resultados obtenidos demuestran la mejora del proceso de digestión anaerobia del RS por codigestión con RV y RP.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT In the present work the anaerobic monodigestion process of rice drying residue (RS) and its codigestion with cattle (RV) and pig (RP) residues in semicontinuoregime was evaluated. The RS was studied on a laboratory scale in a continuous stirred tank reactor (CSTR) in mesophilic regime (37 ºC). The organic loading rate (OLR) was increased from 0,5 to 3 g VS/Ld in monodigestion, and then kept at 3 g VS/Ld in the codigestion study for the mixture RS96:RV2:RP2, RS94:RV4:RP2 and RS92:RV6:RP2 (based on the % volatile solids in the mixture). The best biogas yield (ybiogas) was obtained during codigestion for the RS92:RV6:RP2 mixture with a value of 705,48 L/kgVS and a biogas productivity of 2,42 Lbiogas/ Lreactor for a OLR of 3 gVS/Ld. The ybiogas was 28% higher than RS in monodigestion. Results show, an improvement in the AD process of RS by codigestion with RV and RP.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[digestión anaerobia]]></kwd>
<kwd lng="es"><![CDATA[codigestión anaerobia]]></kwd>
<kwd lng="es"><![CDATA[biogás;residuo del secado del arroz]]></kwd>
<kwd lng="en"><![CDATA[Anaerobic digestion;anaerobiccodigestion;biogas;rice drying residue]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[SUÁREZ-HERNÁNDEZ]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[SOSA-CÁCERES]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[&#8220;Evaluation of the biogas production potential in Cuba&#8221;]]></article-title>
<source><![CDATA[Pastos y Forrajes]]></source>
<year>2018</year>
<volume>41</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>79-85</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[CONTRERAS]]></surname>
<given-names><![CDATA[L. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Digestión anaerobia de residuos de la agroindustria arrocera cubana para la producción de biogás]]></source>
<year>2013</year>
<publisher-name><![CDATA[Universidad Central &#8220;Marta Abreu&#8221; de Las Villas]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[DÍAZ IGLESIA]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[MIRANDA CABALLERO]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[&#8220;Metodología para obtención de biogás a partir de residuos de cosechas del arroz utilizando como inóculo aguas residuales&#8221;]]></article-title>
<source><![CDATA[Avances]]></source>
<year>2016</year>
<volume>18</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>325-33</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[CONTRERAS]]></surname>
<given-names><![CDATA[L. M.]]></given-names>
</name>
<name>
<surname><![CDATA[SCHELLE]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Methane potential and biodegradability of rice straw, rice husk and rice residues from the drying process]]></article-title>
<source><![CDATA[Water Science and Technology]]></source>
<year>2012</year>
<volume>65</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1142-9</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[NGAN]]></surname>
<given-names><![CDATA[N. V. C.]]></given-names>
</name>
<name>
<surname><![CDATA[CHAN]]></surname>
<given-names><![CDATA[F. M. S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Anaerobic Digestion of Rice Straw for Biogas Production&#8221;. En: Cham: M. Gummert, N. V. Hung, P. Chivenge and B]]></source>
<year>2020</year>
<page-range>65-92</page-range><publisher-name><![CDATA[Douthwaite Sustainable Rice Straw Managementm]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[JABEEN]]></surname>
<given-names><![CDATA[M ZESHAN]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[High-solids anaerobic co-digestion of food waste and rice husk at different organic loading rates]]></article-title>
<source><![CDATA[International Biodeterioration &amp; Biodegradation]]></source>
<year>2015</year>
<volume>102</volume>
<page-range>149-53</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[ZHAN-JIANG]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[JIE]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[High-solid Anaerobic Co-digestion of Food Waste and Rice Straw for Biogas Production]]></article-title>
<source><![CDATA[Journal of Northeast Agricultural University (English Edition)]]></source>
<year>2014</year>
<volume>21</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>61-6</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[MEI]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
<name>
<surname><![CDATA[LIU]]></surname>
<given-names><![CDATA[X.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Anaerobic Mesophilic Codigestion of Rice Straw and Chicken Manure: Effects of Organic Loading Rate on Process Stability and Performance]]></article-title>
<source><![CDATA[Appl Biochem Biotechno]]></source>
<year>2016</year>
<page-range>846-62</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[LÓPEZ GONZÁLEZ]]></surname>
<given-names><![CDATA[L. M.]]></given-names>
</name>
<name>
<surname><![CDATA[RUIZ MANSO]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Codigestión anaerobia del residuo del secado del arroz y excreta porcina en sistema discontinuo]]></article-title>
<source><![CDATA[Revista Tecnología Quimica]]></source>
<year>2019</year>
<volume>39</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>286-300</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[HARYANTO]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[SUGARA]]></surname>
<given-names><![CDATA[B. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Anaerobic Co-digestion of Cow Dung and Rice Straw to Produce Biogas using Semi-Continuous Flow Digester: Effect of Urea Addition]]></source>
<year>2018</year>
<volume>147</volume>
<page-range>755-1307</page-range><publisher-name><![CDATA[IOP Conference Series: Earth and Environmental Science]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[WANG]]></surname>
<given-names><![CDATA[X.]]></given-names>
</name>
<name>
<surname><![CDATA[LU]]></surname>
<given-names><![CDATA[X.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of Temperature and Carbon-Nitrogen (C/N) Ratio on the Performance of Anaerobic Co-Digestion of Dairy Manure, Chicken Manure and Rice Straw: Focusing on Ammonia Inhibition]]></article-title>
<source><![CDATA[PLOS ONE]]></source>
<year>2014</year>
<volume>9</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>97-265</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[KAINTHOLA]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[KALAMDHAD]]></surname>
<given-names><![CDATA[A. S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Enhanced methane production from anaerobic co-digestion of rice straw and hydrilla verticillata and its kinetic analysis]]></article-title>
<source><![CDATA[Biomass and Bioenergy]]></source>
<year>2019</year>
<volume>125</volume>
<page-range>8-16</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[SHEN]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[LI]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of organic loading rate on anaerobic co-digestion of rice straw and pig manure with or without biological pretreatment]]></article-title>
<source><![CDATA[Bioresour Technol]]></source>
<year>2018</year>
<volume>250</volume>
<page-range>155-62</page-range></nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[PRAJAPATI]]></surname>
<given-names><![CDATA[K. K.]]></given-names>
</name>
<name>
<surname><![CDATA[PAREEK]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Pretreatment and Multi-Feed Anaerobic Co-digestion of Agro-Industrial Residual Biomass for Improved Biomethanation and Kinetic Analysis]]></article-title>
<source><![CDATA[Frontiers in Energy Research]]></source>
<year>2018</year>
<volume>6</volume>
<numero>111</numero>
<issue>111</issue>
</nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[APHA]]></surname>
<given-names><![CDATA[AWWA]]></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, USA ]]></publisher-loc>
<publisher-name><![CDATA[American Public Health Association/America Water Works Association/Water Environment Federation]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[VAN SOEST]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[ROBERTSON]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Methods for dietary fiber, neutral detergent fiber, and nonstarch polysaccharides in relation to animal nutrition]]></article-title>
<source><![CDATA[J. Dairy Sci.]]></source>
<year>1991</year>
<volume>74</volume>
<page-range>3583-97</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[YADVIKA]]></surname>
<given-names><![CDATA[SANTOSH]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Enhancement of biogas production from solid substrates using different techniques--a review]]></article-title>
<source><![CDATA[]]></source>
<year>2004</year>
<volume>95</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-10</page-range></nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[WEILAND]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Biogas production: current state and perspectives]]></article-title>
<source><![CDATA[Applied Microbiology and Biotechnology]]></source>
<year>2010</year>
<volume>85</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>849-60</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[ZHOU]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[YANG]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Different organic loading rates on the biogas production during the anaerobic digestion of rice straw: A pilot study]]></article-title>
<source><![CDATA[Bioresource Technology]]></source>
<year>2017</year>
<volume>244</volume>
<page-range>865-71</page-range></nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[CHEN]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[CHENG]]></surname>
<given-names><![CDATA[J. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Inhibition of anaerobic digestion process: A review]]></article-title>
<source><![CDATA[BioresourTechnol]]></source>
<year>2008</year>
<volume>99</volume>
<numero>10</numero>
<issue>10</issue>
<page-range>4044-64</page-range></nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[LEITÃO]]></surname>
<given-names><![CDATA[R. C.]]></given-names>
</name>
<name>
<surname><![CDATA[VAN HAANDEL]]></surname>
<given-names><![CDATA[A. C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The effects of operational and environmental variations on anaerobic wastewater treatment systems: A review]]></article-title>
<source><![CDATA[Bioresour Technol]]></source>
<year>2006</year>
<volume>97</volume>
<page-range>1105-18</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[AHRING]]></surname>
<given-names><![CDATA[B. K.]]></given-names>
</name>
<name>
<surname><![CDATA[SANDBERG]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Volatile fatty acids as indicators of process imbalance in anaerobic digestors]]></article-title>
<source><![CDATA[Appl. Microbiol. Biotechnol.]]></source>
<year>1995</year>
<volume>43</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>559-65</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[CHENG]]></surname>
<given-names><![CDATA[X.-Y.]]></given-names>
</name>
<name>
<surname><![CDATA[ZHONG]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of feed to inoculum ratio, co-digestion, and pretreatment on biogas production from anaerobic digestion of cotton stalk.]]></article-title>
<source><![CDATA[Energy Fuels]]></source>
<year>2014</year>
<volume>28</volume>
<page-range>3157-66</page-range></nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[MUSTAFA]]></surname>
<given-names><![CDATA[A. M.]]></given-names>
</name>
<name>
<surname><![CDATA[POULSEN]]></surname>
<given-names><![CDATA[T. G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Fungal pretreatment of rice straw with Pleurotus ostreatus and Trichoderma reesei to enhance methane production under solid-state anaerobic digestion]]></article-title>
<source><![CDATA[Applied Energy]]></source>
<year>2016</year>
<volume>180</volume>
<page-range>661-71</page-range></nlm-citation>
</ref>
<ref id="B25">
<label>25</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[LI]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[LIU]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of feedstock ratio and organic loading rate on the anaerobic mesophilic co-digestion of rice straw and pig manure]]></article-title>
<source><![CDATA[Bioresource Technology]]></source>
<year>2015</year>
<volume>187</volume>
<page-range>120-7</page-range></nlm-citation>
</ref>
<ref id="B26">
<label>26</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[PALMQVIST]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Fermentation of lignocellulosic hydrolysates. II: inhibitors and mechanisms of inhibition]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[HAHN-HAGERDAL.]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<source><![CDATA[Bioresour Technol]]></source>
<year>2000</year>
<volume>74</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>25-33</page-range></nlm-citation>
</ref>
<ref id="B27">
<label>27</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[MOSCHE]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Detection of very low saturation constants in anaerobic digestion: influences of calcium carbonate precipitation and pH]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[JORDENING]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Applied Microbiology &amp; Biotechnology]]></source>
<year>1998</year>
<volume>49</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>793-9</page-range></nlm-citation>
</ref>
<ref id="B28">
<label>28</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[BARREDO]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of propionate toxicity on methanogen-enriched sludge, methanobrevibacter smithii, and methanospirillum hungatii at different pH values]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[EVISON]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Applied &amp; Environmental Microbiology]]></source>
<year>1991</year>
<volume>57</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1764-9</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
