<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="static/style.xsl"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-05-05T11:36:11Z</responseDate><request verb="GetRecord" identifier="oai:uvadoc.uva.es:10324/35285" metadataPrefix="uketd_dc">https://uvadoc.uva.es/oai/request</request><GetRecord><record><header><identifier>oai:uvadoc.uva.es:10324/35285</identifier><datestamp>2021-06-29T23:30:05Z</datestamp><setSpec>com_10324_38</setSpec><setSpec>col_10324_852</setSpec></header><metadata><uketd_dc:uketddc xmlns:uketd_dc="http://naca.central.cranfield.ac.uk/ethos-oai/2.0/" xmlns:doc="http://www.lyncode.com/xoai" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:uketdterms="http://naca.central.cranfield.ac.uk/ethos-oai/terms/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:dc="http://purl.org/dc/elements/1.1/" xsi:schemaLocation="http://naca.central.cranfield.ac.uk/ethos-oai/2.0/ http://naca.central.cranfield.ac.uk/ethos-oai/2.0/uketd_dc.xsd">
<dc:title>Volatile fatty acids production from fish wastewater</dc:title>
<dc:creator>Aragón Ruiz, Manuel</dc:creator>
<uketdterms:advisor>García Encina, Pedro Antonio</uketdterms:advisor>
<dcterms:abstract>In this work, two experiments were carried out to investigate the production of volatile &#xd;
fatty acids (VFAs) through the anaerobic degradation of a wastewater collected from a &#xd;
fish processing industry. The first experiment was carried out in batches, at different &#xd;
initial pH values (5, 6, 7, 8 and 9). Acetate and propionate were the main products &#xd;
obtained at the end of the experiment. The highest production of VFAs (5276 mg &#xd;
COD/L) was obtained at pH 8.   &#xd;
The second experiment was performed in an anaerobic continuous reactor at pH 5.5. &#xd;
Several conditions were tested to improve the VFAs production such as different HRT &#xd;
(18 h, 12 h and 8 h), different feed´s dilution (50 x, 25 x, 10 x, 2 x and 1 x) and different &#xd;
feed´s salinity (2.8 g/L and 20 g/L of salt). The increase of feed´s salinity appear to be &#xd;
the best strategy, since the concentration of VFAs increased (457 mg COD/L with 2,8 &#xd;
mg/L of salt to 788 mg COD/L with 20 mg/L of salt) and the percentage of CH4 in the &#xd;
reactor decreased.</dcterms:abstract>
<dcterms:abstract>El objetivo del trabajo fue la obtención de ácidos grasos volátiles (AGVs) a través de la degradación anaeróbica incompleta de un efluente procedente de una industria de procesamiento de pescado. Para ello se realizaron dos experimentos: &#xd;
El primero se llevó a cabo en un reactor anaerobio continuo. Durante el experimento se fueron variando distintos parámetros de operación: tiempo hidráulico de retención (TRH), dilución de la alimentación y salinidad de la misma, para encontrar las mejores condiciones para la producción de AGVs.&#xd;
El segundo experimento se llevó a cabo en ensayos por lotes a diferentes valores de pH: 5, 6, 7, 8 y 9. De esta forma se estudio cómo afectaban los distintos pHs a la producción de AGVs.</dcterms:abstract>
<dcterms:issued>2018</dcterms:issued>
<dc:type>info:eu-repo/semantics/bachelorThesis</dc:type>
<dc:language xsi:type="dcterms:ISO639-2">eng</dc:language>
<uketdterms:sponsor>Departamento de Ingeniería Química y Tecnología del Medio Ambiente</uketdterms:sponsor>
<dcterms:isReferencedBy>http://uvadoc.uva.es/handle/10324/35285</dcterms:isReferencedBy>
<dc:identifier xsi:type="dcterms:URI">https://uvadoc.uva.es/bitstream/10324/35285/1/TFG-I-1081.pdf</dc:identifier>
<uketdterms:checksum xsi:type="uketdterms:MD5">bc219440e7a5f7fb3c7443b73e14dcd5</uketdterms:checksum>
<dcterms:license>https://uvadoc.uva.es/bitstream/10324/35285/5/license.txt</dcterms:license>
<uketdterms:checksum xsi:type="uketdterms:MD5">909e634ba52becf192e4e9b4bcde7863</uketdterms:checksum>
<dc:rights>Attribution-NonCommercial-NoDerivatives 4.0 International</dc:rights>
<dc:subject>Ácidos grasos - Industria y comercio</dc:subject>
<dc:subject>Biodegradación</dc:subject>
<dc:subject>Aguas residuales - Depuración - Tratamiento biológico</dc:subject>
<dc:subject>Industria pesquera</dc:subject>
<dc:subject>Recuperación (Residuos, etc.)</dc:subject>
</uketd_dc:uketddc></metadata></record></GetRecord></OAI-PMH>