City of Laguna Beach, CA
Bluebird Lift Station
Average Flow of 1.4 MGD
Mr. David Shissler
Director of Water Quality
Laguna Beach, CA
Complaints of hydrogen sulfide odors from their sewer system led the California coastal community of Laguna Beach to investigate such odor control remedies as scrubbers, chemical treatment, pipeline enhancement and the new ECO2 SuperOxygenation technology. Because of physical constraints and the high cost of chemicals, scrubbers and chemical treatment were not deemed practical or cost effective. In addition, hazardous waste by-products required special handling and expensive disposal.
The ECO2 system offered several valuable advantages including a return on investment of less than four years, increased service life of the North Coast Interceptor pipeline (a result of preventing corrosion due to hydrogen sulfide formation) and the significant reduction of odors between the lift stations. The City elected to install on-site oxygen generation to allow the entire ECO2 system to be built inside of the existing Bluebird Lift Station, providing an odor control system that is invisible to the surrounding beach community.
The ECO2 system was designed specifically for Laguna Beach and guarantees an average H2S level of <5 ppm under design operating conditions. The 17,000 ft. force main handles a maximum flow of 5.4 MGD.
The ECO2 SuperOxygenation system was installed during the Fall of 2006 and is meeting all design criteria.
Laguna Beach, California
The City of Laguna Beach is a unique beach community with over seven miles of beautiful coastal beaches. The City has 24,000 residents and receives over 3 million visitors each year. The City’s pride in its beautiful canyons, coastal hills and beaches necessitated a nearly invisible, yet practical and cost- effective odor control solution for its sewer system. The ECO2 SuperOxygenation system combined with on-site oxygen generation guarantees an average of <5 ppm H2S levels, all within the footprint of the existing Bluebird Lift Station.
Innovative and highly effective, SuperOxygenation technology is an eco friendly alternative to traditional chemical treatments for water and wastewater. Focusing on odor and corrosion prevention, ECO2 has helped cities across the country solve their needs in both municipal and industrial applications.
The City of Laguna Beach received complaints of sewer system odors for many years, and in a 2003 engineering study, identified Hydrogen Sulfide as the primary source of the odors, with gas scrubbers as the recommended solution. After soliciting proposals from traditional vendors, the City concluded that scrubbers would triple their chemical budget, be aesthetically unpleasing and leave the City with hazardous waste by-products requiring special handling and disposal.
Staff surveyed nearby wastewater agencies and discovered that Orange County Sanitation District had rigorously tested a new technology—ECO2 SuperOxygenation—that virtually eliminated the production of Hydrogen Sulfide. According to OCSD’s project manager, the new system worked immediately and provided consistent performance.
With over seven miles of beautiful California beaches, Laguna Beach welcomes over 3 million visitors every year and its residents expect superior services and utility systems that blend in with the architecture and look of the community. Laguna Beach staff and ECO2 engineers collaborated to design a nearly invisible odor control solution. The ECO2 SuperOxygenation cone, oxygen generation system, and piping, pumps and controls all fit within the existing Bluebird Pump Station. The installation, start-up and testing were completed in the Fall of 2006.
- Return on Investment of less than four years.
- An Invisible Installation, with all equipment fitting within the existing pump station.
- Minimal Maintenance that can be absorbed into the current operations budget.
- Increased Service Life of the North Coast Interceptor pipeline by reducing the development of corrosive acids in the system.
- Guaranteed Performance Levels, reducing H2S levels from over 300 ppm to <5 ppm. The measured performance of the system is ≤ 2 ppm.
|Length of force main||16,896||ft.|
|Diameter of force main||24 to 30||in.|
|Oxygen dissolution rate||1,000||lb./day|
|Measured performance—H2S||≤ 2||ppm|
Become a leader in water treatment.
ECO2 SuperOxygenation systems for water and wastewater treatment are designed and produced by Eco-Oxygen Technologies, LLC headquartered in Indianapolis, Indiana. The technology is the pioneering effort of Dr. Richard Speece, Centennial Professor Emeritus of Civil and Environmental Engineering at Vanderbilt University.
The ECO2 oxygenation method is a simple process based upon the scientific principle of Henry’s Law. No chemicals and no moving parts other than standard industrial water pumps are used. The result is a robust, reliable, economically competitive and environmentally friendly technology.
In municipal applications, ECO2 technology eliminates hydrogen sulfide odor and corrosion by dissolving pure oxygen in wastewater at high concentrations (50-75 mg/l) which prevents the formation of hydrogen sulfide and the associated “rotten-egg” odor. This approach saves money on alternative chemicals, provides pretreatment and does not increase total dissolved solids. ECO2 engineers are presently focused on wastewater projects in Maine, Indiana, California, Kentucky and Texas.