Refurbished Dual Phase Extraction and Groundwater Treatment System with Thermal Oxidizer
MAE2 was approached by a consultant that had performed a Corrective Action Plan and recommended a multi-phase extraction system to perform remediation at a gas station site.
The consultant also required a thermal oxidizer to treat the vapors removed from the site. In order to keep the budget costs low the consultant looked for a high quality, dependable refurbished system, along with a rental oxidizer.
The consultant knew from experience that they could rely on MAE2 for quality workmanship and long-term product support.
An existing Dual Phase Extraction system refurbished for this project
MAE2 took an existing Dual Phase Extraction system from our fleet and made minor modifications. The control panel was updated with a new touch screen control panel and remote telemetry system. The system components were completely tested, and a full O & M and cleaning was conducted to make the system site ready.
Existing DPE internal view
The system is a Dual Phase Extraction and Groundwater Treatment system designed for 20 GPM water flow and 330 ACFM vapor flow at 25” HG. There is a 12 point extraction manifold that pulls both water and vapor from the extraction wells using two 10 HP rotary claw vacuum pumps mounted in parallel. The extracted groundwater is collected in the 120 G Vapor/Liquid separator and then pumped to an Oil Water Separator (OWS) using a progressive cavity transfer pump.
Any free fuel that is extracted is collected in the OWS and gravity drains into a product holding tank. The water is pumped from the OWS through a bag filter, to remove suspended solids, and then to a Poly Stackable Tray Air Stripper. After the air stripper the water is pumped through two bag filters in series, to remove any remaining suspended solids and two medium pressure steel carbon vessels for final treatment before discharge. The OWS pump and Air Stripper pump are centrifugal transfer pumps. The system is controlled by a custom PLC control panel that allows for remote access and control using web based telemetry.
Dual Phase Extraction system components
The vapors pulled from the ground contain higher concentrations of hydrocarbon than allowed without treatment. MAE2 provided a rental Gas Fired Thermal Oxidizer to destroy 99+% of the hydrocarbons. The oxidizer uses the hydrocarbons pulled from the ground to fuel the thermal oxidizer, efficiently destroying them.
External Thermal Oxidizer