Facility Tour
While you are in Sacramento for the conference, we would like to invite you to take advantage of a unique opportunity – register for a local facility tour!
Sacramento Regional Wastewater Treatment Plant – Advanced Treatment Technology Pilot Project Technical Tour
Tuesday, March 27, 2012
1:30 pm – 5:00 pm
Fee: $45
Sacramento Regional Wastewater Treatment Plant (SRWTP)
The Sacramento Regional County Sanitation District (SRCSD) provides regional wastewater conveyance treatment and disposal services to residential, industrial and commercial customers throughout unincorporated Sacramento County; the cities of Citrus Heights, Elk Grove, Folsom, Rancho Cordova, Sacramento and West Sacramento; and the communities of Courtland and Walnut Grove. The wastewater travels through a network consisting of 168 miles of interceptor pipelines and pump stations to the Sacramento Regional Wastewater Treatment Plant (SRWTP) in Elk Grove, where approximately 150 million gallons of wastewater are treated each day and safely discharged into the Sacramento River.
The SRWTP is located on 900 acres of a 3,550-acre site between I-5 and Franklin Boulevard in Elk Grove. The remaining 2,650 acres serve as a “bufferland” between the treatment plan and nearby residential areas. The SRWTP co-exists with and provides a home for abundant wildlife and riparian habitat.
SRCSD owns and operates the SRWTP under a National Pollutant Discharge Elimination System (NPDES) permit from the Central Valley Regional Water Quality Control Board (CVRWQCB). The SRWTP currently provides secondary treatment using an activated sludge process. Influent is screened and flows through a primary sedimentation process. Next, oxygen is added to remove the lighter organic particles. Clean water decants off the top of the secondary clarifiers, and chlorine is added while the wastewater travels through a two-mile outfall pipeline to the Sacramento River. Before entering the river, sulfur dioxide is added to neutralize the chlorine.
Advanced Treatment Technology Pilot Project (ATTP)
On December 9, 2010, the CVRWQCB adopted new discharge requirements for the SRWTP that are stricter than the existing secondary treatment process is capable of meeting. The new permit requires ammonia removal and filtration, so SRCSD is conducting the Advanced Treatment Technology Pilot Project (ATTP) to select the best combination of treatment technologies for the final design that will meet the new permit requirements.
The ATTP is being conducted with air activated sludge (AAS) for nitrogen removal, followed by tertiary filtration and disinfection. The project involves granular media filtration (GMF), GMF with pre-ozonation, and membrane filtration as viable tertiary filtration technologies. Chlorination, ozonation, and ultraviolet disinfection will be evaluated as viable disinfection technologies.
The testing will occur during a 10-month period, and is designed to confirm process performance and provide information for full-scale design,. The goals of the testing are to:
- Demonstrate permit compliance of AAS, filtration and disinfection processes;
- Demonstrate Title 22 equivalency for filtration and disinfection processes;
- Obtain full-scale design parameters for the AAS, filtration and disinfection processes;
- Where possible, recommend a treatment train alternative for full-scale implementation based on performance reliability and business case evaluation (BCE) results; and
- Identify additional pilot testing activities for consideration for Phase 2 testing to further screen technologies and/or that could result in potential cost savings at full-scale through optimization.
