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	Provedor de dados 91 (1) Autor Deus,Fábio P. de (1) Mesquita,Marcio (1) Testezlaf,Roberto (1) Palavra-chave Emitters clogging (1) Localized irrigation (1) Water treatment (1) Tipo do documento Info:eu-repo/semantics/article (1) Ano 2016 (1) País Brazil (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última Assessment methodology of backwash in pressurized sand filters 91 Deus,Fábio P. de; Testezlaf,Roberto; Mesquita,Marcio. ABSTRACT The objective of this study was to apply a methodology based on sampling sand from contaminated filter beds, to evaluate the performance of the backwash process in pressurized sand filters used in irrigation. Backwash trials were conducted in an experimental module with three new sand filters of the same commercial model. The evaluations were conducted after filtration processes performed using four filtration rates and three separate sand particle sizes (fine - 0.55 mm; medium - 0.77 mm, and coarse sand - 1.04 mm diameter), repeated in three subsequent cycles. After reaching a fixed expansion of 25% of the filter bed height, the backwash processes were performed for 15 min. Backwash cleaning efficiency was evaluated in all trials based on the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Localized irrigation; Water treatment; Emitters clogging. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000700600 Registros recuperados: 1 Primeira ... 1 ... Última

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