This powerpoint presentation presents a project to upgrade a large scale pretreatment process at the Bearspaw Water Treatment Plant in the City of Calgary Water Resources, Calgary, Saskatchewan, Canada. Pretreatment facility objectives included: low clarified water turbidity; protozoan sized particle reduction;
organic carbon reduction;
disinfection byproduct (DBP)
precursor reduction; and,
taste and odor reduction. Current upgrade program drivers included:
Water Quality (Regulatory and Voluntary);
Water Quantity (Demand vs. Capacity);
Safety Considerations;
Plant Reliability; and,
Environmental. Technology pre-screening criteria is listed, along with process evaluation for:
plate settlers;
Dissolved Air Flotation (DAF); and,
Actiflo® ballasted flocculation. The process selection summary included:
Actiflo® was selected - best treated water
quality for all raw water quality conditions;
Actiflo® and DAF were found to have
similar overall project costs; DAF process would be severely limited
during the high turbidity spring run-off
events; and,
plate settlers had highest life-cycle costs
and the least improvement in water quality. Actiflo® design parameters are presented, along with an illustration of the Actiflo® process, a process flow diagram, pretreatment facility plan view, and pictures of the construction site.
| Edition : | Vol. - No. |
| Number of Pages : | 37 |
| Published : | 06/01/2007 |
