The City of Brawley (City) owns and operates a wastewater treatment plant with a 5.9 million gallons per day permitted capacity. The influent wastewater is treated by extended aeration basins (i.e., Biolac system) and secondary clarifiers. The secondary effluent is then disinfected by a Trojan UV4000 system and then discharged to the New River.
The City installed the TrojanUV4000 system in 2001. This was an advanced UV disinfection system designed for large wastewater treatment plants and it has provided effective disinfection against waterborne pathogens to meet the effluent discharge requirements.
Due to the evolution of UV technology and newer UV wastewater disinfection systems, Trojan ceased production of the UV4000 in 2017. Partly based on LEE + RO’s successful installation of a new UV system for the City of San Diego’s South Bay Water Reclamation facility, the City contracted with LEE + RO to provide engineering services for the design and construction of a new replacement disinfection system.
LEE + RO’s scope of work covers engineering services including an initial site investigation, review of existing disinfection and effluent discharge requirements, selection of a TrojanUVSigna model (duty and standby banks), designing the structural modifications, and providing the electrical and control system design for the new installation and designs for associated electrical system improvements, civil and structural improvements, as well as providing bid phase engineering services and engineering services during construction.
The new system will provide the City various benefits including low lamp count and high electrical efficiency, optimized power consumption, easy UV lamp change, and much more.