Sam H. Hobbs Regional Wastewater Treatment Facility Improvements
Location: Casper, Wyo.
Client: City of Casper
Completion Date: September 2008
Burns & McDonnell is providing comprehensive facility planning, design and construction administration services for the City of Casper's Sam H. Hobbs Regional Wastewater Plant.
The facility plan focused on four specific areas in the wastewater treatment plant: the secondary treatment system, the effluent disinfection system, the biosolids processing and handling process, and an odor control and digester gas cleaning system. Each system or process was evaluated based on existing and potential future regulations, treatment capacity, overall performance, and detailed economic and non-economic analyses.
- Nitrification
- Biosolids improvements
- Odor control
- Automation and supervisory control and data acquisition (SCADA)
- Ferric residuals
- State Revolving Funding (SRF)
The major capital improvements include:
- Construction of a new blower building that will house three new single-stage efficiency centrifugal blowers.
- Removal of the existing mechanical aeration system and installation of a high efficiency fine bubble diffuser system. The aeration system improvements will provide the treatment facility a highly efficient, flexible secondary treatment system.
- Rehabilitation of the existing secondary clarifiers, including complete removal and replacement of the clarifier mechanisms.
- Installation of a new ultraviolet light effluent disinfection system that will replace the existing chlorine gas system.
- Conversion of the existing chlorine building to a plant maintenance building.
- Construction of a new centrifuge dewatering system to reduce biosolids disposal costs.
- Installation of a ferric chloride/ferrous chloride chemical storage and feed system to assist in odor minimization and to reduce historically observed high levels of hydrogen sulfide in the anaerobic digester biogas.
- Construction of a new plant administration building which includes offices, break room, restrooms and instrument maintenance area.
- Expansion of the existing parking garage for large vehicles.
- New mechanical systems, power distribution systems and an enhanced supervisory control and data acquisition (SCADA) system.
All improvements were designed in-house by Burns & McDonnell, and the $13 million project is under construction, scheduled for completion for September 2008.
Final design included direct procurement of the centrifuge equipment, the ultraviolet (UV) light disinfection equipment and centrifugal blower equipment.
