Mwiinga1.pdf (4.68 MB)
0/0

Impacts of coagulation on upflow roughing filtration in layers

Download (4.68 MB)
conference contribution
posted on 12.02.2018 by Godfrey Mwiinga, Boikanyo Setlhare, R.E. Loewenthal
In community water supplies, technologies that are people-centred are encouraged to ensure sustainability. Upflow roughing filtration in layers (URFL) is a simple pre-treatment process applied to reduce raw water turbidity without the aid of coagulation to levels acceptable for effective slow sand filtration (SSF). However, practical applications of URFL are limited to raw waters with turbidity < 20 - 50 NTU. Incorporation of simple coagulation, achieved by gravity dosing equipment, can provide an opportunity for URFL to treat higher turbidity raw waters. This paper present results of a study carried out on the impacts of low-dosage simple coagulation on URFL performance. The main evaluation criterion was the effluent turbidity. Intermittent coagulation was studied as well, including its effect on, headloss and filter media cleaning. The URFL unit was regularly challenged with high turbidity loads without adjusting coagulant dosages. Coagulation was achieved with lower-than conventional dosages. URFL effluents were sent to SSF, whose effluent turbidity was analysed.
Logo branding

Categories

Keyword(s)

History

School

  • Architecture, Building and Civil Engineering

Research Unit

  • Water, Engineering and Development Centre (WEDC)

Published in

WEDC Conference

Citation

MWIINGA, G. ... et al, 2004. Impacts of coagulation on upflow roughing filtration in layers. IN: Godfrey, S. (ed). People-centred approaches to water and environmental sanitation: Proceedings of the 30th WEDC International Conference, Vientiane, Laos, 25-29 October 2004, pp. 491-498.

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

2004

Notes

This is a conference paper.

Other identifier

WEDC_ID:12136

Language

en

Exports

Logo branding

Categories

Keyword(s)

Exports