Weber Basin Water Conservancy District,
Davis North Water Treatment Plant
- Plant expansion to 46 mgd.
- Pre- and intermediate ozone designed for taste and odor control and enhanced particle removal.
- One of the country's first large-scale UV disinfection drinking water installation.
- Conjunctive use of ozone and UV resulted in a facility cost approximately
- 50 percent of the next lowest-cost alternative.
Carollo provided design and construction services for an expansion and upgrade for the Weber Basin Water Conservancy District, Davis North Water Treatment Plant increasing the plant capacity from 26 mgd to 46 mgd.
The design includes new conventional flocculation and sedimentation basins, pre- and intermediate ozonation, and ultraviolet disinfection. The design configuration provides ozonation upstream of granular media filtration to promote additional biological removal of organic compounds within the filter bed. The biologically activated filtration (BAF) approach promotes the reduction in total organic carbon and is an effective control scheme for odor and taste in the finished water. An evaluation of disinfection and taste and odor control strategies showed the synergistic combination of ozone and UV disinfection resulted in a facility cost reduction of approximately 50 percent compared with the next lowest cost alternative.