By Martha Koester
The technology employed at El Paso Water’s Frontera Lift Station continues to draw the international spotlight – this time from the recent 2020 Water Environment Federation (WEF) Collections System Digital Conference.
The conference thrust the lift station’s advances in super oxygenation on an international stage again in early June. Wastewater industry interest in the cost-effective odor control system has been constant since its installation in 2014.
‘Shining’ model
Calls are still coming in from other national and international utilities curious about the technology, said David Ornelas, Wastewater Systems Division Manager.
“We are one of the shining case studies in the industry because the technology really worked at the Frontera Lift Station,” Ornelas said. The lift station is in a flat Upper Valley area of west El Paso, relying on pressurized force mains to move wastewater as opposed to traditional gravity wastewater pipes.
Ornelas and Aide Fuentes, Wastewater Treatment Manager, were involved in the original case study to identify technology to reduce odors at the nearby John T. Hickerson Water Reclamation Plant. The Frontera Lift Station receives approximately 10 MGD of wastewater and pumps it to the Hickerson Plant, which is 3.5 miles away.
Super oxygenation system technology was still novel in the U.S., and EPWater and project contractor Jacobs Engineering agreed the lift station was in an ideal location to use the technology. The system would be located upstream – 3.5 miles – from the plant.
“Not only did it help reduce the odors at the Hickerson Plant, but it helped control the odors and corrosion in the force mains that run parallel along the path from the lift station to the plant,” Ornelas said. “This technology has been a really good match.”
Cleaner alternative
The beauty of the super oxygenation system technology is in its simplicity, Ornelas and Fuentes said. The technology makes the lift station a better neighbor by discharging air that’s much cleaner and reduces the number of odor complaints we get, they said.
“This is innovative and cost effective because oxygen is relatively cheap and available,” Ornelas said. “The Speece Cone is a one-of-a-kind patented system that increases the amount of oxygen in the water, reducing odors significantly.”
The project was not without its challenges, said Fuentes, who served as the project manager in construction at the time. Among the challenges were:
- Because the super oxygenation cone sits about 24 feet above the force main, piping had to be routed to ground level and then back to the force main.
- The lift station header had to be “hot tapped” by the contractor because the flow in the pipe was active and could not be taken out of service during the construction process.
Despite the construction hurdles, the technology has proven its worth and has furthered EPWater’s reputation in the industry as an innovator.
“We were one of the first ones to employ this technology here in the U.S.,” Fuentes said. “At the time, there were only a handful of utilities using it.”
“It was a team effort, for sure,” Ornelas said.
About the Author: Martha Koester is a former journalist of more than 20 years and serves as a writer and Utility Information Coordinator for El Paso Water.
