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handle: 10261/30453
[EN]Procedure for filtering effluents from biological treatment of residual urban water.This includes a filtering unit comprising a quick gravity or pressure filter with a zeolyte filtering material that is naturally rich in clinoptilolite, and using an air-water backwash system which uses part of the same filtered water for backwashing with air, providing a clean, stratified filter bed with little water in a short period of time. The procedure is able to filter effluents of residual urban water treated by biological treatment units such as activated sludge, anaerobic treatment reactors and oxidation lagoons. [ES]Que comprende una unidad de filtración formada por un filtro rápido de gravedad o de presión con un material filtrante zeolita natural rica en clinoptilolita, y con un sistema de retrolavado aire-agua que utiliza parte de la misma agua filtrada para pasar a contracorriente en unión del aire, y esto logra que con menos agua se obtenga un lecho filtrante limpio y estratificado en poco tiempo. El procedimiento, es apto para filtrar efluentes de aguas residuales urbanas tratados por unidades de tratamiento biológico tales como lodos activados, reactores de tratamiento anaerobio y lagunas de oxidación.
Fecha de solicitud: 16.04.2001.- Titulares:Consejo Superior de Investigaciones Científicas (CSIC).- Centro Nacional de Investigaciones cientificas.
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