What Are Air Strippers?

If you work in an industry that uses petroleum products, cleaning solvents, process wastewater, groundwater, or other harmful contaminants, chances are you have seen an Air stripping tower.

This type of equipment is used to clean water in factories, drinking water facilities, waste cleanup sites, and anywhere that contaminated water is found.

Air strippers remove chemicals called volatile organic compounds (VOCs), that are easily evaporated from liquid solution into the gas phase. Once the VOC is captured in the air, the very low concentration air mixture is typically released into the atmosphere.  Vapor phase air treatment is also an option for higher concentrations when considering air stripping tower design.

Containments Commonly Removed by Air Stripping Towers

  • Trichloroethylene (TCE)Delta Vanguard - Air Strippers & Degassifiers
  • Perchloroethylene (PCE)
  • Vinyl Chloride
  • Carbon Tetrachloride
  • BTEX
  • MTBE
  • Hydrogen Sulfide (H2S)
  • Carbon Dioxide (CO2)
  • Freon
  • Ammonia

Packed Column Air Strippers and How They Work

Packed column air strippers are the most common type of air stripper. They are designed to be the most economical and effective air stripping water treatment option for large flows of wastewater and highly contaminated source water. They operate at a fraction of the pressure drop of low profile or bubbling air strippers, which results in a large reduction in the horsepower requirement for air movement in the stripper.

How Does Air Stripping Work

Water is pumped from the source up to the top of the tower.  The liquid is carefully distributed at the top of the tower by way of a specially designed liquid distributor and flows down by gravity through the packed bed in the opposite direction of ascending air being blown upwards by a mechanical blower

The VOCs are transferred from the contaminated water stream to the air stream and then exit through the top of the stripper. Treated water is collected at the bottom of the tower in the sump.

The packing is supported at the bottom of the bed by a support plate that is carefully designed not to restrain the gas flow.

Three Things You Should Know About Air Strippers and Air Stripping Tower Manufacturers

1. They clean groundwater and industrial process water


Since the principles of aeration and mass transfer don’t change depending on the water source, air strippers can be used to clean contaminated groundwater and industrial process water. This process is typically referred to as a pump-and-treat remediation system when used with groundwater.

2. They're efficient and environmentally friendly 


Air stripping equipment is environmentally friendly because it uses aeration to force harmful chemicals out of water sources, protecting the user of the water and the location where the water is discharged back into the environment. Therefore, it is possible that air stripper installations can have a positive impact on quality of life, whether by cleaning the water at a local factory, manufacturing facility, or flowing through the faucet in your home.

3. Delta is the industry leader in air stripping technology


Air stripping tower manufacturers are not all created equal. Delta Cooling Towers Inc. offers a patented system of Vanguard® Air Strippers and Degassifiers. With available sizes up to 15-foot in diameter and capacities of up to 4000 GPM per column, these units are some of the most innovative and efficient on the market. With more than 600 installations worldwide, the proof is in our successful track record.


Air Stripper

Advantages of Air Strippers

  • Removes up to 99.9 percent of pollutants when using a packed column.
  • Modular, pre-assembled, and lightweight for simple, fast, economical installation.
  • Sizes vary, providing options for any location.

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