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|Title:||Stripping volatile organic compounds and petroleum hydrocarbons from water by tray aeration|
|Authors:||University of New Hampshire. Environmental Research Group.|
North East Environmental Products, Inc. (West Lebanon, New Hampshire)
University of New Hampshire. Dept. of Civil Engineering.
LaBranche, David F.
Collins, M. Robin.
Tray-type air strippers
Volatile organic compounds
Hazardous waste sites
|Publisher:||Cold Regions Research and Engineering Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Special report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 97-6.|
Abstract: Volatile organic compounds (VOCs) and petroleum products are ubiquitous groundwater contaminants. Petroleum products, e.g., diesel fuel, contain a wide array of volatile, semivolatile, and long-chain hydrocarbon compounds. This research sought to determine whether air stripping can provide a site-specific treatment solution for petroleum-contaminated groundwaters and to document the abilities and limitations of tray-type (ShallowTray) air stripping technology. Full factorial experimental trials were conducted to determine the influence of inlet water flow rate and temperature on trichloroethylene (TCE), perchloroethylene (PCE) and total petroleum hydrocarbon (TPH) removal. As expected, TPH removal controlled air stripper performance, and liquid temperature affected removal more than flow rate. The mass transfer rate of TCE and PCE from water to air was controlled by the compound’s volatility, while the TPH mass transfer rate was controlled by the compound’s concentration gradient. Results indicate that economical air stripping of VOC and TPH compounds can be achieved using low liquid flow rates (20–75 L/min) and medium liquid temperatures (16–28°C) in tray-type air strippers.
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Special Report|
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