Blanket dynamics in upflow suspended bed

doi:10.1016/j.watres.2003.09.002

機構典藏 > College of Engineering > Graduate Institute & Department of Chemical and Materials Engineering > Journal Article > Item 987654321/44298

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Title:	Blanket dynamics in upflow suspended bed
Authors:	Su, C. T.;Wu, R. M;Lee, D. J.
Contributors:	淡江大學化學工程與材料工程學系
Keywords:	Blanket;Flocculation clarifier;Model;Experiment;Solids flux
Date:	2004-01
Issue Date:	2010-03-09 10:09:31 (UTC+8)
Publisher:	I W A Publishing
Abstract:	A one-dimensional model for the spatio-temporal variation of solids fraction in the blanket considering both the hydrodynamic dispersion and the convection effects was proposed in this study. The model equation was a wave equation whose solution presented shock-wave like characteristic. The model output predicted that the distribution of the solids fraction in the blanket would, firstly, evolve to a uniform distribution at a lower solids fraction. Afterward, the blanket would compact itself to another uniform distribution at a higher solids fraction. Experimental works with synthetic raw water coagulated with PACl suspended in a lab-scale suspended bed confirmed the theoretical predictions. The solids flux plot was constructed with underdosed, optimal and overdosed suspensions. Change in coagulant dose would affect the blanket height and the response time. The solids flux curve was shifted accordingly. The “optimal’ operational condition for the upflow suspended bed that produced the lowest effluent turbidity was identified and discussed.
Relation:	Water research 38(1), pp.89-96
DOI:	10.1016/j.watres.2003.09.002
Appears in Collections:	[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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