The main objective of this study was to compare the total suspended solids (TSS) removal efficiency of a modified sedimentation tank to that of a conventional tank The experimental tank was designed for flow to pass over a series of inclined plates. It had a much shallower flow through zone and the inclined plates were situated just below this zone. The inclined plates were added to provide a quiescent settling zone for the falling particles and to act as a barrier to prevent scour of settled particles. A conventional horizontal flow sedimentation tank was also used in this study. The two designs were run in parallel and a highly concentrated clay suspension was passed through both tanks. The TSS concentrations of both the influence and effluent streams were measured. The response of both designs to different parameters such as sampling time, depth over the inclined plates, flowrate, inclined plates spacing and inlet TSS concentration was observed. The tank with the inclined plates (at the smallest spacing) proved to have an equal to slightly high removal efficiency and a slightly better reaction to the change of parameters. This tank also proved to have less dead volume than the control tank. Since the reduction in flow through volume proved to be as good and slightly better than the control tank the concept deserves further research. It has the potential to permit considerable tank depth reductions while retaining efficiency.
| Identifer | oai:union.ndltd.org:uottawa.ca/oai:ruor.uottawa.ca:10393/4199 |
| Date | January 1997 |
| Creators | Savoie, Andrée J. |
| Contributors | Droste, Ronald L., |
| Publisher | University of Ottawa (Canada) |
| Source Sets | Université d’Ottawa |
| Detected Language | English |
| Type | Thesis |
| Format | 130 p. |
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