Air stripping VOCs from groundwater: Process design considerations

✍ Scribed by Ball, Brandon R. ;Edwards, Michael D.

• Publisher: American Institute of Chemical Engineers
• Year: 1992
• Tongue: English
• Weight: 884 KB
• Volume: 11
• Category: Article
• ISSN: 0278-4491
• DOI: 10.1002/ep.670110116

✦ Synopsis

Considerations for evaluating and designing the air stripping process are presented by case study. The case study involves the design of an air stripping process to remediate groundwater contaminated with volatile organic compounds ( VOCs) at a National Priorities List site in Tacoma, WA. Design objectives included developing a tower with minimum volume and energy requirements while complying with discharge air and water quality standards. A two-phase resistance model using Onda correlations to determine liquid-and gas-phase mass transfer coefficients was used to assist in the evaluation and design.

tower design are presented. The ability of the model to simulate process performance is demonstrated by comparison with actual data for 11 priority pollutant list VOCs evaluated during an onsite pilot study. Design procedures with which to develop a tower with minimum volume and energy requirements are described, Other considerations involving the evaluation of VOC emissions and the precipitation and buildup of inorganic constituents within the internal packing media are described.

Considerations f o r applying the two-phase resistance model to air stripping