Air Stripping

Air stripping stands as a highly effective and widely embraced method for eliminating volatile organic compounds (VOCs) from contaminated water sources. In air stripping systems, air is blended with a water source to create an extensive air-water contact area, facilitating the transfer of VOCs and dissolved gases—such as radon or hydrogen sulfide—from the water to the air. Besides VOC removal, air stripping is used for eliminating contaminants like iron and manganese, enhancing taste, or eliminating odor. Recognized as an EPA Best Available Technology (BAT) for dealing with various VOCs including benzene, toluene, xylene, tri/tetrachloroethylene, trihalomethanes, vinyl chloride, and numerous others, air stripping proves to be an indispensable tool in water treatment.


The GDT™ mixing and contacting process has demonstrated remarkable efficiency in its application to air stripping tasks. Through this process, gases are dynamically transferred into solution while undesired entrained or undissolved gases are removed.

In the GDT process, air is drawn into the pressurized water to be treated via high-efficiency Mazzei venturi injectors. The vigorous mixing occurring at the injector facilitates efficient air transfer into solution while stripping away unwanted materials. The Mazzei degas separator, a patented component, effectively removes the air-stripped materials before they have the chance to go back into solution. Additionally, staged recirculation within the GDT system enables enhanced removal rates of the most challenging contaminants.

The GDT mixing and contacting process, either independently or in conjunction with other technologies, is an efficient and reliable means of treating water. It offers water treatment professionals the benefits of design flexibility for addressing various flow rate.

In addition to the technological benefits, the GDT process features:

  • A compact footprint
  • Low capital installation and operating costs
  • Easy installation
  • Non-fouling pressurized system

Moreover, GDT empowers users to effectively and efficiently contain and treat process off-gas.


  • Acid Water Treatment — CO2 Removal
    The ratio of carbon dioxide (CO2) to bicarbonate ion (HCO3) directly affects the pH of water—the higher the ratio, the more naturally acidic the water. Due to its corrosive nature, acidic water accelerates piping material degradation, a leading cause of elevated lead/copper levels in water distribution systems. The GDT mixing and contacting process effectively addresses corrosion concerns by stripping CO2 from water, thereby reducing the CO2/HCO3 ratio.
  • Methane Removal
    Methane is easy to strip out of water through high-efficiency aeration. Utilizing Mazzei venturi injectors as part of the GDT mixing and contacting system can achieve over 80% removal efficiency.
  • Radon Reduction
    The GDT mixing and contacting process is exceptionally well-suited for radon stripping from water, owing to its high Henry’s Law constant and pressurized operational design.
Performance Data & Drawings

Performance Data & Drawings

Find performance data and/or drawings on many Mazzei products including our venturi injectors.

Data & Drawings
Technical Assistance

Technical Assistance

Answers to your questions… specifications, installation tips and technical bulletins to assist you with your water project, plus find Mazzei documentation.

Get Assistance
Knowledge Center

Knowledge Center

Looking for more info about Mazzei products for the water market?

Take a look at articles, technical papers, case studies and brochures, plus find videos and animations.

Get Info