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Natural coagulants in water clarification

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conference contribution
posted on 12.02.2018, 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.

Funding

This paper reports on the initial findings of a three year research programme funded by the Overseas Development Administration.

History

School

  • Architecture, Building and Civil Engineering

Research Unit

  • Water, Engineering and Development Centre (WEDC)

Published in

WEDC Conference

Citation

FOLKARD, 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

Version

VoR (Version of Record)

Publisher statement

This 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/

Publication date

1987

Notes

This is a conference paper.

Other identifier

WEDC_ID:13064

Language

en

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