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handle: 10902/4563
RESUMEN: En el presente trabajo se plantea como primer objetivo la optimización de la línea de tratamiento previa a la ósmosis inversa para reducir el ensuciamiento de las membranas. Para ello, se han considerado dos casos de estudio basados en los resultados de pretratamiento convencional para agua de alimentación a ósmosis inversa obtenidos en dos plantas de demostración. En ambos casos, se prueban diferentes configuraciones de pretratamiento, basadas en un tratamiento físico-químico seguido por una doble etapa de filtración incluyendo ésta filtros bicapa y tricapa presurizados, combinadas con la adicción de diversos coagulantes y floculantes. Para cada una de las configuraciones de pretratamiento estudiadas, los valores de SDI (Índice de Densidad de Sedimentos) y MFI (Índice de Atascamiento Modificado) obtenidos en cada ensayo se evaluaron en gráficos de probabilidad con una distribución normal y manteniendo intervalos de confianza del 95%. Como segundo objetivo del trabajo, se estudió si existe una correspondencia entre los criterios basados en los parámetros SDI y MFI, analizados previamente.
ABSTRACT: The first objective of current work is to establish the best reverse osmosis pretreatment line in order to reduce the membranes fouling. Two case studies have been considered, both of them based on the conventional pretreatment results obtained in demostration plants. In both studies, different reverse osmosis pretreatment configurations, resulting from the combination of a physical-chemical treatment with a double stage filtration, with pressurized dual-media and three.layer filters, and completed with coagulants/flocculants addition, are tested. For each configuration, the SDI (Silt Density Index) and MFI (Modified Fouling Index) values for each test were evaluated in probability graphics with normal distribution and keeping confidence intervals of 95%. Finally, the second objective of current work was to study whether there is a correspondence between SDI and MFI based criteria or not.
Índice de Densidad de Sedimentos (SDI), Índice de Atascamiento Modificado (MFI), Reverse osmosis, Ósmosis inversa, Filtración, Pretratamiento, Silt Density Index (SDI), Modified Fouling Index (MFI), Pretreatment, Filtration
Índice de Densidad de Sedimentos (SDI), Índice de Atascamiento Modificado (MFI), Reverse osmosis, Ósmosis inversa, Filtración, Pretratamiento, Silt Density Index (SDI), Modified Fouling Index (MFI), Pretreatment, Filtration
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