A pilot scale slow sand filtration (SSF) plant in Jimma, Ethiopia, was used to select suitable filter sand. Four sand samples of varying grain sizes were collected from three different sites.
| Title | Performance of pilot scale slow sand filters using different local sands in Ethiopia |
| Publication Type | Book |
| Year of Publication | 1990 |
| Authors | Goitom, K |
| Secondary Title | Publication Series B / Tampere University of Technology |
| Volume | no. 44 |
| Pagination | 54 p., app. 3 p.: fig., tab. |
| Date Published | 1990-01-01 |
| Publisher | Tampere University of Technology, Institute of Water and Environmental Engineeri |
| Place Published | Tampere, Finland |
| ISBN Number | 9517215770 |
| Keywords | chemical quality, design, ethiopia, faecal coliforms, filtration rate, local materials, pilot plants, sand, slow sand filtration, turbidity removal |
| Abstract | A pilot scale slow sand filtration (SSF) plant in Jimma, Ethiopia, was used to select suitable filter sand. Four sand samples of varying grain sizes were collected from three different sites. Based on a comparison of physical, bacteriological and chemical quality of the effluent, as well as of head-loss and filtration rate, the coarsest sand (effective size (ES) 0.36-0.50 mm and uniformity coefficient (UC) 2.70) gave the best results. The sample with the finest grain size (ES = 0.15-0.30 mm, UC = 3.10) gave the poorest results, including the least number of zero faecal coliform counts. Although the two other samples had similar physical characteristics (ES = 0.23-0.36 mm in both cases), sand from one site generally gave filter effluent of a better bacteriological quality and less clogging than sand from the second site. |
| Notes | Bibliography: p. 52-54 |
| Custom 1 | 255.1 |
