Lakes, Rivers, & Wetlands

River, Harbor & Canal Water Quality Improvement

Delivering Pure Dissolved Oxygen Directly Where Its Needed

Deliver Large Amounts of D.O.

Dissolved Oxygen (D.O.) is good. Raising the D.O. in impaired waterways supports aquatic life and helps with the aerobic degradation of organic matter. Without the addition of dissolved oxygen lower depths of rivers are often void of oxygen, decreasing fish habitat and allowing for the accumulation of muck on the bottom. To support aquatic life in the D.O. impaired Savannah River during and after the dredging of the harbor, the US Army Corps of Engineers evaluated over 25 aeration and oxygenation technologies and chose ECO2‘s Speece Cones to do the job.

ECO2‘s Speece Cones can effectively deliver large amounts of dissolved oxygen from shore based, barge mounted or submerged systems to sensitive areas in polluted rivers.

Savannah River ECO2 SuperOxygenation
The ECO2 “Speece Cone” Superoxygenation System was rated best of the 25 systems studied, based on cost, oxygenation level, flexibility and mobility.
Gowanus Canal Brooklyn NY Superoxygenation System
NYDEP selected ECO2 for large-scale project to increase dissolved oxygen and improve water quality in the highly contaminated Gowanus Canal.

Water Quality Improvement Project in NYC’s Gowanus Canal

The ECO2 System was designed to continuously deliver dissolved oxygen to the Gowanus Canal during the 26 month construction period. The oxygenated water was distributed along a 2,500 ft diffuser pipeline to ensure adequate lateral mixing of the water without undue disturbance of bottom sediments.


Lake Water Quality Improvement

Nutrient & Algae Reduction, Reversing Eutrophic Conditions.

Harmful Algal Blooms

Eutrophication is a leading cause of impairment of many freshwater ecosystems around the world. Most lakes have accumulated vast amounts of nutrients in their sediments. During summer stagnation and subsequent anoxia at the bottom of the lake (hypolimnion), these nutrients are resuspended into the water column, serving as fertilizer to the algae. This process of ‘internal nutrient cycling’ can be entirely prevented by Hypolimnetic Oxygenation with an ECO2 Speece Cone.

Algae Blooms
ECO2 - Marston Assembly
Denver Water, working with Alex Horne Associates and CDM, conducted an analysis of hypolimnetic treatment options that would fit the specific conditions of the Marston Reservoir. Oxygenation, using the Speece Cone developed by ECO2, was selected.

Leading Technology in Hypolimnetic Oxidation

The ECO2 Speece Cone is the most efficient technology on the market to effectively oxygenate the hypolimnion of a lake. The Hypolimnetic Oxygenation System (HOS) pulls water from the hypolimnion, oxygenates it and blends it back into water with the same density at the same depth – horizontally across the sediment. This horizontal movement provides for maximum dispersion of the oxygenated plume, without creating an upward trend normally caused by bubbles. It therefore also maintains the lake’s natural stratification and bottom cold waters advantageous for fish and selective depth withdrawal for water treatment.


Multiple Benefits

Creating an ‘aerobic cap’ above the sediment prevents the release of phosphorous, ultimately reducing algae blooms the following season. Furthermore, it provides D.O. for aquatic species and aerobic degradation of organic matter, inhibits the formation of H2S in the sediment, may reduce mercury methylation and will prevent the release of iron and manganese from the sediment.

ECO2 - D.O. for aquatic species and aerobic degradation of organic matter

Invasive Species Control

Natural Solution for Mitigation of Aquatic Invasive Species

Aquatic invasive species often lead to economic and environmental damage. Over time, their relentless growth and accumulation can disrupt the natural balance of a waterbody, causing the decline of native species and a cascading effect on the local ecosystem.

Reactionary methods of control include chemical addition and mechanical removal; however, neither of these are particularly eco-friendly nor effective.

ECO2 is committed to providing sustainable, efficient solutions for unique environmental challenges. By using dissolved CO2 as a preventive measure, we can protect our infrastructure, save resources, and preserve the delicate balance of our aquatic ecosystems.

Groundbreaking research has proven the overwhelming effectiveness and efficiency of ECO2 technology for dissolved carbon dioxide applied to targeted areas, with zero impact to non-targeted species.

This innovative solution is currently under final development before publication of peer-reviewed full-scale pilot data, and the implementation of the ECO2 patented technology. Stay tuned for more information and reach out to get on our mailing list for updates.

Invasive Species
Invasive Species Control Technology ECO2
Invasive Species Control ECO2

Wetlands Superoxygenation Delivers D.O., Not Just Air”

Wetlands for Removing Nitrogen, or Filtering Algae.

Nitrification and total nitrogen removal in a super-oxygenated wetland

Published Article by David Austin Et. Al

Nitrification & Total Nitrogen Removal in a Super-oxygenated Wetland

A novel surface-flow wetland demonstrates high-rate nitrification by recirculatingwater supersaturated with oxygen.


Presentation by Dr. Alex Horne

The Triple Threat to Algae – Oxygenation, Vigorous Epilimnion Mixing, and Algae-Filtering Wetlands

Understanding the evolution of hypolimnetic oxygenation for Lakes, Reservoirs, and Wetlands.


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