Central Florida Plant Reduces DBPs with Ozone

Feb. 9, 2015
The new system delivers up to 20% lower power use than in the original design

Pinnacle Ozone completed installation of a 600-lb-per-day ozone generator system for a new 4.5 million gal-per-day (mgd) water treatment facility in Sanford, Fla. The new ozone system provides removal of color, dissolved organic carbon (DOC), and hydrogen sulfide (H2S) as a part of an ozone + biologically activated carbon (BAC) system. As a part of the project Pinnacle provided a turnkey ozone process including a liquid oxygen (LOX) storage and delivery system, Pinnacle Zenith series ozone generator, triplex side-stream ozone injection system, chilled water-cooling system, ozone destruct system and complete ozone process controls. Completed with Pinnacle’s latest generation QuadBlock ozone generator cells, the system delivers 20% lower energy use than the original base design.

Background

In summer 2014 Pinnacle Ozone supplied a complete 600-lb-per-day ozone generation and injection system for the city of Sanford, Fla. The new facility provides treatment of up to 4.5 mgd of groundwater for municipal water supply. There were high concentrations of organic carbon, color and H2S in the local groundwater. To address potential concerns with THMs and disinfection byproducts (DBPs), the city selected a new ozone + BAC system for the treatment process.

Having committed to an ozone-based treatment process, the city conducted a review of available ozone systems that are installed in a number of nearby communities. Overall, the city found that almost every existing conventional ozone system was lacking in aspects of service, maintenance and operating cost. After thoroughly reviewing the design, technology and operating features of Pinnacle’s Zenith ozone generator system, they selected the technology for the new project.

Treatment Approach

As a part of the project, Pinnacle provided a complete turnkey ozone process for the new plant. The new system includes a LOX storage and delivery system, a single 600-lb-per-day Zenith series ozone generator, triplex 890-gal-per-minute side-stream ozone injection system, 30-ton water chiller, ozone destruct system and complete ozone process controls.

The ozone control system for the project involves monitoring and control of dissolved ozone concentration at several locations in the treatment process. Control of the process must be maintained in a relatively narrow band to guarantee sufficient treatment at low dosage, and to prevent damage to the BAC system at high concentrations.

Most importantly, the new ozone system provides a high level of automatic process control and minimizes maintenance. As a result, operation costs are significantly lower with even higher reliability than were available with older ozone technology.

Results

Since installation, the new Pinnacle Ozone system at the Sanford water treatment plant has provided smooth startup of the ozone + BAC treatment process. The system provides completely automatic control of the ozone process and which responds to variations in water quality with minimal operator involvement. The new system has also exceeded operating cost expectations by delivering up to 20% lower power use than in the original design.

Louis LeBrun, P.E., is vice president of Pinnacle Ozone Solutions. LeBrun can be reached at [email protected].

About the Author

Louis LeBrun

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