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Natural coagulants in water clarification
conference contributionposted on 2018-02-12, 15:09 authored by Geoff K. Folkard, John P. Sutherland, W.D. Grant
Powdered seed suspensions of the Moringa oleifera tree have proved effective as a primary coagulant to clarify a stable kaolinite suspension. Acting as a cationic polyelectrolyte optimum minimum dosage to achieve maximum turbidity removal have been determined over a range of initial turbidity values (50-550NTU). The weight ratio of seed dosage to clay concentration appears independent of initial clay concentration. A field usable dissolved air flotation system has been developed. This technique, when applied to a kaolinite/bentonite model suspension, produced clear water in minutes as opposed to hours for conventional sedimentation. Topics for further investigation are outlined.
This paper reports on the initial findings of a three year research programme funded by the Overseas Development Administration.
- Architecture, Building and Civil Engineering
- Water, Engineering and Development Centre (WEDC)
Published inWEDC Conference
CitationFOLKARD, G.K., SUTHERLAND, J.P. and GRANT, W.D., 1987. Natural coagulants in water clarification. IN: Pickford, J. (ed). Rural water and engineering development in Africa: Proceedings of the 13th WEDC International Conference, Lilongwe, Malawi, 6-10 April 1987, pp.42-45.
Publisher© WEDC, Loughborough University
- VoR (Version of Record)
Publisher statementThis work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/
NotesThis is a conference paper.