DGI combines the industry’s best oxygen transfer efficiency with unparalleled precision, delivering an energy-efficient and cost-effective solution for water and wastewater treatment. Leveraging cutting-edge technology, DGI achieves gas transfer rates exceeding 99%, by pre-dissolving high-purity gas in a pressurized slipstream. This slipstream can reach oxygen concentrations up to 900mg/l, which is then precisely diluted into the main water volume to meet exact specifications. To guarantee optimal oxygen saturation, DGI is equipped with specially designed high-velocity channel injectors that maximize gas retention and optimize distribution. Whether as a rapid-response solution or to enhance legacy systems, DGI is versatile enough to improve performance across a broad spectrum of water and wastewater treatment applications.
WATER TREATMENT
DGI® Dissolved Gas Infusion for O2
Delivering O2 dosing rates that surpass conventional aeration technologies
Benefits and Features
- Effective, flexible and environmentally-friendly
- Combines a patented infusion vessel and injector array to ensure effective dissolved oxygen (DO) delivery
- Highest oxygen transfer efficiency available on the market
- Augmentation and rapid response
- Verified and endorsed by leading experts
Versatile DGI applications
Water & wastewater treatment:
- Rapid dosing to increase treatment capacity
- Hydrogen sulfide (H2S) abatement and odor control
Food & beverage processes:
- Increasing aeration capacity and flexibility
Aquaculture
- Precise control of dissolved oxygen
- Improve animal health and growth rates
Agriculture:
- Radically increasing plant yields
- Maximizing potential of limited water supplies
Natural waters & reservoirs:
- Algae bloom remediation or avoidance
- Restoring water quality and biological health
Landfill leachate:
- Increased treatment capacity
DGI Technology at a Glance
In validation testing endorsed by leading industry experts, 99%+ of the injected oxygen is transferred to the receiving water and is available for process needs.
PRESSURIZE
A slipstream of process water is pressurized to maximize achievable dissolved oxygen.
INFUSE
95%+ saturation of the slipstream with dissolved oxygen is achieved with Fuel Tech’s DGI technology.
INJECT
The oxygen-laden slipstream is returned to the process basin through a patent-pending injection array for optimal distribution.
How does DGI technology achieve such high oxygen transfer efficiency?
DGI dramatically increases the rate of dissolved oxygen introduced into the water treatment process by using a pressure vessel. High purity oxygen is pre-dissolved in a pressurized slipstream, reaching concentrations of over 900mg/l oxygen. The oxygen-rich slipstream is then returned to the main volume of water at a 95% saturation rate and discharged through specially designed high-velocity channel injectors.
These injectors are designed to maintain DO levels and ensure optimal distribution, making DGI suitable for use in shorter water columns. Integrated sensors within the treatment zones can then automatically regulate DO concentrations, ensuring consistent levels throughout the process. With its rapid deployment capabilities and scalability, the DGI system can be customized to meet the oxygen demands of a wide range of applications, with capacities ranging from 10 to 10,000lbs of oxygen per day.
Independently verified as delivering the highest oxygen dosage rates
Fuel Tech’s DGI oxygenation system was tested using a modified version of the Measurement of Oxygen Transfer in Clean Water standard published by the American Society of Civil Engineers (ASCE/EWRI 2-06). The test results demonstrated that over 99+% of the oxygen introduced remained available for critical process requirements, including biological digestion and chemical reactions. These results were peer-reviewed and validated by two independent industry experts.
Customizing DGI to meet specific requirements
The DGI oxygenation system delivers dosing rates that surpass those of conventional aeration technologies, offering enhanced treatment performance and faster response times. Fuel Tech’s experienced product and process engineering team specializes in providing custom-designed solutions tailored to the specific needs of your water and wastewater treatment applications. We consider factors such as target dissolved oxygen levels, treatment duration, the reduction of contaminants, and seasonal fluctuations, to develop an optimal solution.