One-, two-, and three-phase flow during free-product recovery
Conference
·
OSTI ID:490947
- ENSR Consulting and Engineering, Acton, MA (United States)
An increasing variety of options is becoming available for recovering organic liquids from the subsurface following releases from leaking underground storage tanks, buried pipelines, and surface spills. Multiphase fluid flow in porous media during product recovery must be considered to optimize desired effects and minimize unintended consequences. Free-product recovery commonly focuses first on soils that are saturated with respect to nonaqueous-phase liquid (NAPL), especially when a substantial thickness of floating product is apparent in monitoring wells. This paper also addresses product recovery from soils that are unsaturated with respect to NAPL, such as in the transition zone between the water table and the capillary fringe. Considering both saturated and unsaturated soils, the available product recovery methods can generally be classified as those that aim to recover NAPL only; NAPL and water; and NAPL, water, and vapor. The corresponding flow processes, respectively, involve one, two, and three phases. Examples of these distinctly different approaches are presented, along with their applicability, advantages, and disadvantages.
- OSTI ID:
- 490947
- Report Number(s):
- CONF-950483--; ISBN 1-57477-007-1
- Country of Publication:
- United States
- Language:
- English
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