DTA Series – Non-Fouling Air Strippers
H2K’s Patent Pending DTA series non-fouling air strippers are designed to handle the harshest environment where high levels of suspended solids, iron, bacteria, or hardness are present and where low maintenance is of high priority.
Air strippers are used for the removal of volatile organic compounds (VOC), gasoline range organics (GRO) and chlorinated organic compounds from a liquid stream. The process involves high air to water contact by forcing air through contaminated process water, groundwater or surface water which allows the volatile contaminates to strip off the contaminated water and out of the liquid stream. The now contaminated air discharge from this process is then either allowed to discharge into the atmosphere if below discharge regulations or treated, typically with vapor phase carbon vessels with a thermal or catalytic oxidizer.
H2K Technologies DTA Series Air Strippers are the best choice for treating volatile organic compounds (VOCs) in environments where inorganic fouling is an issue. Our patent pending non-fouling process to aerate the process water flow allows the unit to operate for extended periods of time without impacting the removal efficiency. Any inorganic solids and sediment that drop out in the process are easily cleaned from the bottom of the unit by one technician without any special tools or lifting equipment required. Because there are no trays or packing to foul, these units are able to provide continuous use even in the worst fouling conditions with large amounts of inorganic and suspended solids. Since the units are able to handle large amounts of solids, customers only need to perform routine inspections and occasional preventative maintenance.
- Benzene removal
- BTEX removal (Gasoline, Benzene, Toluene, Ethylbenzene, Xylene)
- VOC removal (TCE, PCE, TCA, Vinyl Chloride, Carbon Tetrachloride)
- GRO removal
- Chlorinated compound removal
- Wastewater treatment
- Industrial wastewater
- Groundwater remediation
- De-gasification (CO2 removal)
- Low-maintenance air stripper
- Non-fouling air stripper
H2K’s non-fouling air stripper design: DTA series air strippers from H2K Technologies avoid the biggest problem that plagues all other air strippers: fouling and scaling of the treatment surface. Our patent pending design is based on our knowledge of other products and our combined 70 years of experience with air stripping. The high air to water design does not allow any fouling to build up on the contact surfaces even during extended use in the heaviest fouling conditions. With our design any precipitated solids or sediments that drop out of the process flow does not plug the air to water interface area and as such does not affect performance. This process allows customers to spend drastically reduced time on maintenance and keeps the system running effectively without down time for costly cleaning expense.
Easy maintenance: When it comes to servicing our foul-resistant air strippers, maintenance can be handled by a single technician with little to no tools. The unit is designed with a hinged, low-access cover which allows a single user to access all of the internal components easily. There are no heavy trays to remove during service visits; the internals are easily removable for any maintenance when needed.
The sizing of air strippers is based on several parameters.
Henry’s law constant of contaminants: Henry’s constant is a property of a compound which tells how easily a compound will evaporate or strip out of the water flow. This value changes with temperature, and can vary greatly between different compounds or different combinations of compounds. In general, the strippability of a compound increases with lower values of Henry’s constant.
Concentration of contaminants: Air strippers are able to remove a certain percentage of each contaminant at a given flow rate. In general, the higher the concentration of a given contaminant, the larger the air stripper will need to be to treat it effectively to meet discharge limits.
Process flow rate: As the flow rate of the water through the system increases, the residence time is decreased. Applications with higher flow rates require larger size of air strippers.
Application of discharge water and treatment limits: The final destination of the treated water will affect the required size of the air stripper. In general, stricter discharge limits (such as for municipal or drinking water applications) require a larger air stripper in order to effectively treat the process flow.
This custom fiberglass DTA air stripper package was installed in a corrosive wastewater process. Process dealt with very high solids loading and surfactant foaming which required a non-fouling solution. This treatment package includes inlet/outlet pH adjustment mixer tanks, substantial instrumentation, and local control panel.
Mobile treatment system
This 200 GPM mobile treatment system features an H2K Technologies DTA-8-2 air stripper unit for the process water. It was designed to treat benzene at 97% efficiency from 10,000 ppb to 300 ppb discharge limits at 200 GPM. This unit has been in service for 10 years and has been utilized at many sites with high-fouling potential for dewatering, remediation, and emergency response
This DTA-10 unit replaced a stacked low profile air stripper that required an expensive crane lift and multiple people on site for monthly cleaning maintenance. After switching to the DTA air stripper, preventative maintenance visits were reduced to once every 6 months.
Oil & Gas Industry
This DTA-16 unit is part of a treatment system that is capable of handling up to 200 GPM. It was designed to treat benzene, toluene, ethyl benzene, and xylene at over 96% efficiency at 200 GPM. This unit was chosen due to the combination of treatment efficiency and limited maintenance visits at this site.