What is Multi-phase extraction remediation?
Multi-phase extraction (MPE) is a technology designed to simultaneously remove any combination of light non-aqueous phase liquid (LNAPL), groundwater, and vapor. LNAPL or groundwater recovery can be enhanced by creating a vacuum to induce fluid flow toward recovery wells.
What is a MPE system?
Overview. MPE is a remediation technology based on the extraction of both liquids (groundwater, nonaqueous phase liquid (NAPL)) and soil vapor from the subsurface to reduce or eliminate a source of volatile organic compounds (VOCs). The off-gas and the extracted liquid are typically treated before being discharged.
What is Bioslurping?
Bioslurping merges the remedial technologies of bioventing and vacuum-enhanced free- product recovery. Bioventing encourages the aerobic bioremediation of hydrocarbon- impacted soils. Vacuum-enhanced free-product recovery removes LNAPLs from the capillary fringe and the water table.
How does dual phase extraction work?
How does dual-phase extraction work? In this process, one or more pumps are used to remove contaminants from the groundwater or to the soil. Using a single pump, the system uses high-pressure airflow to pull liquid droplets, filled with contaminants, from the soil. It also extracts groundwater at the same time.
What is Biopile remediation?
Description. A bio-pile is a bioremediation technology in which excavated soils are mixed with soil amendments, formed into compost piles, and enclosed for treatment. The basic bio-pile system includes a treatment bed, an aeration system, an irrigation/nutrient system and a leachate collection system.
What is dual-phase vacuum extraction?
Dual-phase extraction, also known as multi-phase extraction, vacuum-enhanced extraction, or bioslurping, is an in-situ technology that uses pumps to remove various combinations of contaminated groundwater, separate-phase petroleum product, and hydrocarbon vapor from the subsurface.
What is the role of Biosparging in bioremediation?
Biosparging is an in-situ remediation technology that uses indigenous microorganisms to biodegrade organic constituents in the saturated zone. In biosparging, air (or oxygen) and nutrients (if needed) are injected into the saturated zone to increase the biological activity of the indigenous microorganisms.
What is meant by Phytostabilization?
Phytostabilization involves the reduction of the mobility of heavy metals in soil. The mobility of contaminants is reduced by the accumulation of contaminants by plant roots, absorption onto roots, or precipitation within the root zone.
What is Biopile process?
Description: Biopiling is a full-scale technology in which excavated soils are piled and typically constructed in a treatment area that consists of a leachate collection and aeration system. It is commonly applied to reduce concentrations of petroleum components in soils through utilising the process of biodegradation.
What is Phytotransformation process?
Phytotransformation, also referred to as phytodegradation, is the breakdown of organic contaminants sequestered by plants via: (1) metabolic processes within the plant; or (2) the effect of compounds, such as enzymes, produced by the plant.
What is Multi-Phase Extraction (MPE)?
Multi-Phase Extraction (MPE) is a rapidly emerging, in-situ remediation technology for simultaneous extraction of vapor phase, dissolved phase and separate phase contaminants from vadose zone, capillary fringe, and saturated zone soils and groundwater.
What is dual phase extraction?
In dual-phase extraction (DPE), soil gas and liquids are conveyed from the extraction well to the surface in separate conduits by separate pumps or blowers. A common “pipe within a pipe” configuration is depicted in Figure 2-1.
What is the difference between MPE and groundwater recovery?
MPE is typically applied in recovery wells with some portion of the well screen extending above the water table into the vadose zone. Groundwater recovery is achieved by pumping at or below the water table. The applied vacuum extracts soil vapor and enhances groundwater recovery.
What is groundwater extraction?
Groundwater extraction seeks to reduce the mass of dissolved and non-aqueous phase constituents and to reduce mobility of contaminant plumes by hydraulic containment. The primary removal mechanism is groundwater advection and dissolution of constituents located in the saturated subsurface.