Breakthrough Characteristics and Flow-Rate Interaction in Water Defluoridation with a Bauxite-Gypsum-Magnesite Composite Filter

Simple item page
dc.contributor.authorThole, Bernard
dc.contributor.authorMtalo, Felix W.
dc.contributor.authorMasamba, W. R. L.
dc.date.accessioned2016-03-23T08:17:49Z
dc.date.available2016-03-23T08:17:49Z
dc.date.issued2012-11
dc.descriptionFull text can be accessed at http://www.actapress.com/Abstract.aspx?paperId=454706en_US
dc.description.abstractWater defluoridation in a fixed bed column may be optimized through choice of flow rate. This, however, affects breakthrough characteristics. In any fixed bed system an understanding of flow rate and breakthrough interactions is therefore important to guide choice of design velocity. Consequently interactions between flow rate and break through characteristics were determined in a fixed bed column in defluoridation with a composite filter of bauxite, gypsum and magnesite. This was an attempt to optimize defluoridation with the three materials. Lower flow rates obtained longer service times but higher residual concentrations of sulphates and chlorides. Higher flow rates registered lower residual sulphate and chloride concentrations but obtained lower service times. There were no significant differences in residual concentrations of aluminium, iron, calcium and magnesium among the different flow rate regimes. Adsorbent exhaustion rates and critical bed depths increased with increase in flow rates, indicating that lower flow rates offered better technical system performance. Critical bed depths ranged from 5.23 to 10.89 cm for flow rate range of 0.68 to 1.25 ml/s. Operating lines were polynomic with generic form δ = C1 t2 - C2 t + C3, where δ is adsorbent exhaustion rate and t is empty bed residence time. Choice of flow rates, in this system requires a balance between service-time optimisation and water quality.en_US
dc.identifier.citationBernard Thole., Felix Mtalo., & Wellington Masamba., (2012). Breakthrough characteristics and flow-rate interaction in Water Defluoridation with a Bauxite Gypsum-Magnesite composite Filter. Proceedings of Regional Water Conference –Gaberone Botswanaen_US
dc.identifier.doi10.2316/P.2012.762-012
dc.identifier.urihttp://hdl.handle.net/123456789/1237
dc.language.isoenen_US
dc.subjectAdsorptionen_US
dc.subjectbauxiteen_US
dc.subjectdefluoridationen_US
dc.subjectgypsumen_US
dc.subjectmagnesiteen_US
dc.subjectcritical bed depthen_US
dc.titleBreakthrough Characteristics and Flow-Rate Interaction in Water Defluoridation with a Bauxite-Gypsum-Magnesite Composite Filteren_US
dc.typeConference Proceedingsen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Breakthrough Characteristics and Flow-Rate Interaction in Water Defluoridation with a Bauxite-Gypsum-Magnesite Composite Filter.pdf
Size:
145.28 KB
Format:
Adobe Portable Document Format
Description:
Abstract
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Department of Water Resources Engineering