Bozeman Water Reclamation Facility
In this current economic climate, the city of Bozeman took on its largest public works project using innovative design, management and bidding methods. The result is a new $53 million water reclamation facility (WRF) that will meet upcoming stringent water quality requirements and poise the city for future growth. This WRF not only exceeds basic standards, but also sets the stage for advanced nutrient removal systems and achievable discharge limits in Montana and cold-weather regions across the nation.
The use of 3-D CAD models enabled the design team to efficiently and effectively communicate detailed designs with the client to allow seamless transition from preliminary design models through final design and final bidding document production. The city also was better able to visualize the end product and offer constructive input at early design stages.
The detailed project included:
- A headworks building with fine perforated plate screens, two vortex grit removal chambers, and associated screenings and grit processing equipment
- A new primary effluent pump station with a minimum firm capacity of 16.9 MGD, expandable to 25.4 MGD
- The new biological nutrient removal reactor basin complex featuring a 5-Stage Bardenpho process treatment system, adapted to Montana's cold climate, to treat 10.6 MGD
- A retrofit of the existing blower building occurred with the installation of four new high-efficiency and significantly smaller turbo blowers that allow the plant to double its blower capacity within the existing space
- Construction of two new 85-foot diameter secondary clarifiers and a new return activated sludge flow metering and waste activated sludge pump station
- Retrofitting of an existing thickener and abandoned tank into a fermenter to provide a unified fermentation and thickening system for advanced biological nutrient removal
- A new UV disinfection system and structure to enable abandonment of the existing gas chlorine and sulfur dioxide systems. The disinfection system required the addition of a new standby power engine generator.
- A new outfall pipeline from the disinfection facilities to the East Gallatin River, including a re-aeration cascading waterfall to add dissolved oxygen prior to the river
- A new environmentally-friendly administration and laboratory building
- One new anaerobic digester and gas building, and a new solids dewatering building with screw press dewatering and polymer feed equipment, to improve dewatering operations and greatly reduce the volume and cost of hauled sludge
- Engineering support services to the city to pursue a TMDL on the East Gallatin River and develop a long-term effluent management strategy