White paper validates innovative oxygen transfer technology

Fuel Tech DGI white paper


An industry-verified white paper validating the oxygen transfer efficiency of a market leading, innovative, gas infusion technology for water and wastewater treatment has been released.


The trademarked Dissolved Gas Infusion (DGI) technology has been developed by Fuel Tech Inc., a US engineering company, to provide a highly efficient alternative to existing aeration technologies for use in utility and industrial applications. Validation testing shows DGI delivers greater than 99% transfer of oxygen when applied to a treated body of water. Two patent-pending technologies are used in combination to ensure optimal and precise gas delivery to target water and wastewater processes. These include a next generation, pressurized saturator for gas transfer of the oxygen solution to a slipstream of water; and an innovative nozzle delivery system to distribute oxygenated water that virtually eliminates gas loss from a targeted body of water.


DGI process graphic


The trademarked DGI technology was tested using validation methodologies published by the American Society of Civil Engineers (ASCE) and its Environmental & Waters Research Institute (EWRI).  The results of the tests, which have been peer-reviewed and endorsed by industry experts, have determined that:

  • 99+% of the oxygen supplied to the DGI system was delivered to a treatment reservoir as dissolved oxygen with no loss to the atmosphere, within described measurements of uncertainties.
  • The DGI channel injector effectively transferred the oxygen-infused water stream to reservoir water while located only twenty-four inches below the water surface.
  • There was no measurable loss of oxygen to the environment, no visible bubbles, and no delay in the availability of the supplied oxygen to react in the aqueous phase.


Fuel Tech patent pending saturator vessel and control panel


DGI combines market-leading oxygen transfer efficiency with precision accuracy to deliver an energy efficient and cost-effective water and wastewater treatment system. This cutting-edge technology achieves its 99+% gas transfer rate by pre-dissolving high purity gas in a separate pressurized slipstream. The oxygen infused slipstream can reach up to 900mg/l oxygen concentration, which is then added to the main body of water and diluted to meet precise customer specifications. To guarantee high oxygen saturation rates, DGI is fitted with specially designed high-velocity channel injectors that help retain gas and optimize distribution.

DGI can work as a rapid response option or augment underperforming legacy technologies in a wide range of water and wastewater treatment applications across different sectors, including municipal utilities, agriculture, environment, pulp & paper, food & beverage, upstream oil & gas, and landfill management. The technology can help address a range of issues, including regulatory compliance, water preservation, biological treatment, odor reduction, chemical replacement in wastewater treatment, and improving overall water quality for humans and the environment.


Reservoir testing site


Fuel Tech president and chief executive officer Vincent Arnone said, “This validation study is a foundational component of the ongoing DGI business development strategy. Fuel Tech is on track to achieve the goal of product commercialization in 2023 and has also begun recruitment for an experienced water and wastewater treatment executive to take DGI to the next stage.” The DGI technology, and the end-to-end service provided by Illinois-based Fuel Tech Inc., uses exceptional computational fluid dynamics modeling capabilities, which are enhanced by internally developed, high-end, visualization software. 

The full white paper titled, Validation Testing of the Fuel Tech, Inc. Dissolved Gas Infusion Technology for Oxygen Transfer Efficiency in Clean Water, and accompanying DGI brochure is available on the Fuel Tech DGI product page at www.dissolvedgasinfusion.com.


Fuel Tech testing lab


About Fuel Tech
Fuel Tech develops and commercializes state-of-the-art proprietary technologies for air pollution control, process optimization, water treatment, and advanced engineering services. These technologies enable customers to operate in a cost-effective and environmentally sustainable manner.   Fuel Tech is a leader in nitrogen oxide (NOx) reduction and particulate control technologies and its solutions have been in installed on over 1,200 utility, industrial and municipal units worldwide.




About forward-looking statements
This press release contains “forward-looking statements” as defined in Section 21E of the Securities Exchange Act of 1934, as amended, which are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995 and reflect Fuel Tech’s current expectations regarding future growth, results of operations, cash flows, performance and business prospects, and opportunities, as well as assumptions made by, and information currently available to, our management. Fuel Tech has tried to identify forward-looking statements by using words such as “anticipate,” “believe,” “plan,” “expect,” “estimate,” “intend,” “will,” and similar expressions, but these words are not the exclusive means of identifying forward-looking statements. These statements are based on information currently available to Fuel Tech and are subject to various risks, uncertainties, and other factors, including, but not limited to, those discussed in Fuel Tech’s Annual Report on Form 10-K in Item 1A under the caption “Risk Factors,” and subsequent filings under the Securities Exchange Act of 1934, as amended, which could cause Fuel Tech’s actual growth, results of operations, financial condition, cash flows, performance and business prospects and opportunities to differ materially from those expressed in, or implied by, these statements. Fuel Tech undertakes no obligation to update such factors or to publicly announce the results of any of the forward-looking statements contained herein to reflect future events, developments, or changed circumstances or for any other reason. Investors are cautioned that all forward-looking statements involve risks and uncertainties, including those detailed in Fuel Tech’s filings with the Securities and Exchange Commission.