Estimating the hindered-settling flux function from a batch test in a cone

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dc.contributor.author Burger, Raimund
dc.contributor.author Careaga, Julio
dc.contributor.author Diehl, Stefan
dc.contributor.author Merckel, R.D. (Ryan David)
dc.contributor.author Zambrano, Jesús
dc.date.accessioned 2018-09-13T13:06:55Z
dc.date.issued 2018-12
dc.description.abstract The hindered-settling velocity function for the modelling, simulation and control of secondary settling tanks can be determined from batch tests. The conventional method is to measure the velocity of the descending sludge-supernatant interface (sludge blanket) as the change in height over time in a vessel with constant cross-sectional area. Each such experiment provides one point on the flux curve since, under idealizing assumptions (monodisperse suspension, no wall-effects), the concentration of sludge remains constant just below the sludge blanket until some wave from the bottom reaches it. A newly developed method of estimation, based on the theory of nonlinear hyperbolic partial differential equations, is applied to both synthetic and experimental data. The method demonstrates that a substantial portion of the flux function may be estimated from a single batch test in a conical vessel. The new method takes into consideration that during an ideal settling experiment in a cone, the concentration just below the sludge blanket increases with time since the mass of suspended solids occupy a reduced volume over time. en_ZA
dc.description.department Chemical Engineering en_ZA
dc.description.embargo 2019-12-31
dc.description.uri http://www.elsevier.com/locate/ces en_ZA
dc.identifier.citation Bürger, R., Careaga, J., Diehl, S. et al. 2018, 'Estimating the hindered-settling flux function from a batch test in a cone', Chemical Engineering Science, vol. 192, pp. 244-253. en_ZA
dc.identifier.issn 0009-2509 (print)
dc.identifier.issn 1873-4405 (online)
dc.identifier.other 10.1016/j.ces.2018.07.029
dc.identifier.uri http://hdl.handle.net/2263/66560
dc.language.iso en en_ZA
dc.publisher Elsevier en_ZA
dc.rights © 2018 Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Chemical Engineering Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Chemical Engineering Science, vol. 192, pp. 244-253, 2018. doi : 10.1016/j.ces.2018.07.029. en_ZA
dc.subject Sedimentation en_ZA
dc.subject Partial differential equation en_ZA
dc.subject Inverse problem en_ZA
dc.subject Identification en_ZA
dc.title Estimating the hindered-settling flux function from a batch test in a cone en_ZA
dc.type Postprint Article en_ZA


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