Abstract: The invention is a highly efficient soil and/or water treatment system including its own power source, such as an internal combustion engine, in which heat from all heat sources and heat sinks is exchanged through a mutual heat exchanger circuit. The invention further includes a vacuum pulsation method for the in situ water or soil treatment, in which either or both (a) the pressure of the carrier gas pumped into the injection well and (b) the vacuum on the extraction well oscillate in time. The invention also includes a water treatment unit including a sparging bath with counterflowing sparging gas and a succession of sealed vertical water cells in which water flow is parallel and anti-parallel to the motion of sparging gas bubbles in alternate and remaining cells respectively. Condensation recovery of combustibles includes feedback to the power source for combustion thereof.

Abstract: A system for remediating water contaminated with combustible hydrocarbons, particularly groundwater contaminated with gasoline, operates by separation of hydrocarbons from the water by spray aeration of a heated water stream under vacuum. The air-hydrocarbon vapor mixture produced by spray aeration is combusted in an internal combustion engine which generates heat to heat the inlet water and power to drive the vacuum pump and the water lift pump. The exhaust from the engine can be catalytically reacted before exhaust to the atmosphere. The components of the system can be mounted on a portable support and moved to a site and operated continuously to remediate contaminated soil and water.