The Kennebunk Sewer District’s 2006 NPDES permit renewal dictated that the discharge from the town’s POTW must not lower the quality of the water body it discharges into the Mousam River Estuary. The estuary is considered impaired with respect to depletion of dissolved oxygen (D.O.). To meet permit requirement in conjunction with a plant upgrade, Kennebunk Sewer District and Woodard & Curran worked with the State to consider all parameters and potentially impact estuary D.O. levels in the estuary. Parameters such as effluent D.O., TSS, BOD, and nutrients were evaluated regarding treatment technologies and expected impact on the D.O. levels in estuary.
The solution included plant upgrades to minimize solids and BOD in the effluent, and to oxygenate the plant effluent to saturated D.O. levels or greater. To meet this requirement, Kennebunk investigated several aeration and oxygenation technologies, focusing on the ability to meet stated goals and overall capital and operational costs for project life costs. The District selected the ECO2 SuperOxygenation System. This technology uses a conical transfer reactor, also know as the Speece Cone, to dissolve pure oxygen into water at an oxygen transfer efficiency of over 90%.
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.
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.