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A soil remediation system comprises an in-ground extraction well and separation apparatus connected to receive extracted soil vapors from the extraction well. The separation apparatus comprises plural pressure swing adsorption (PSA) components, respective ones of the PSA components containing a resp

A soil remediation system comprises an in-ground extraction well and separation apparatus connected to receive extracted soil vapors from the extraction well. The separation apparatus comprises plural pressure swing adsorption (PSA) components, respective ones of the PSA components containing a respective adsorption medium adapted to adsorb a respective species contained in the extracted soil vapors, the plural PSA components being connected in a serial succession to provide respective desorbed species flow streams of the respective species from the respective PSA components, some of the species being re-injected into the ground.

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1. A soil remediation system, comprising: an in-ground extraction well;a separation apparatus connected to receive extracted soil vapors from said extraction well and comprising plural separation components, respective ones of said plural separation components adapted to separate a respective specie

1. A soil remediation system, comprising: an in-ground extraction well;a separation apparatus connected to receive extracted soil vapors from said extraction well and comprising plural separation components, respective ones of said plural separation components adapted to separate a respective species contained in said extracted soil vapors, said plural separation components being connected in a succession to provide respective separated species flow streams of said respective species from the respective separation components;a condenser coupled to receive the separated species flow stream of a first species from a first one of said separation components; anda first dispersion apparatus comprising one of (a) an in-ground injection well or (b) an atmospheric vent, said first dispersion apparatus coupled to receive a species flow stream of a second species from a second one of said separation components. 2. The system of claim 1 wherein: said first species comprises water vapor and volatile organic compound gases; andsaid condenser comprises a volatile organic compound gas outlet and a separate water outlet. 3. The system of claim 2 wherein said condenser is adapted to separate volatile organic compound gases and water vapor. 4. The system of claim 2 wherein said second species comprises one of nitrogen, carbon dioxide or oxygen. 5. The system of claim 4 wherein said second separation component is adapted to separate said second species to a respective separated species flow stream. 6. The system of claim 4 further comprising: a second dispersion apparatus comprising one of (a) an in-ground injection well or (b) an atmosphere vent, said second dispersion apparatus coupled to receive the separated species flow stream of a third species from a third one of said separation components; andwherein said third species comprises another one of nitrogen, carbon dioxide or oxygen. 7. The system of claim 6 wherein said third separation component is adapted to separate said third species to a respective separated species flow stream. 8. The system of claim 7 further comprising: a third dispersion apparatus comprising one of (a) an in-ground injection well or (b) an atmosphere vent, said further dispersion apparatus coupled to receive a residual gas flow stream of a fourth species from said third one of said separation components; andwherein said fourth species comprises the remaining one of nitrogen, carbon dioxide or oxygen. 9. The system of claim 8 wherein said second species is nitrogen, said third species is carbon dioxide and said fourth species is oxygen. 10. The system of claim 1 further comprising a pump coupled between said extraction well and said first separation component. 11. The system of claim 1 further comprising: a second dispersion apparatus comprising one of (a) an in-ground injection well or (b) an atmosphere vent, said second dispersion apparatus coupled to receive a residual gas flow stream of a third and fourth species from said second one of said separation components;wherein said first species comprises volatile organic compound gases and water vapor, said second species comprises carbon dioxide and said third and fourth species comprise nitrogen and oxygen. 12. The system of claim 1 wherein each one of said separation components comprises a pressure swing adsorption component comprising a vessel and a respective adsorption medium in the vessel adapted to adsorb the respective species, and a pump coupled to said vessel and operable in successive adsorption and desorption phases. 13. The system of claim 1 wherein at least one of said separation components comprises first and second pressure swing adsorption (PSA) units connected in parallel, and a controller governing said first and second PSA units and adapted to operate said first and second PSA units in alternating adsorption and desorption phases. 14. The system of claim 1 wherein at least one of said separation components comprises: first, second and third pressure swing adsorption (PSA) units, each one of said PSA units comprising an inlet, an outlet and a desorbed gas port;a reconfigurable valve matrix coupled to the inlet, outlet and desorbed gas port of each of said PSA units; anda controller governing said reconfigurable valve matrix. 15. The system of claim 14 wherein said controller is programmed to connect a pair of said PSA units in series and operate them in an adsorption mode while isolating the remaining one of said PSA units and operating it in a desorption mode, and periodically rotating the roles of said PSA units in repetitive cycles so that a different pair of said PSA units are connect in series and operated in adsorption mode while another one is operated in desorption mode each cycle. 16. The system of claim 15 wherein each one of said PSA units comprises: a PSA vessel and a layer of an adsorbent material within said vessel, said PSA vessel comprising a chamber inlet, a desorbed species outlet port, and a chamber outlet; anda pressure swing pump coupled to said vessel. 17. The system of claim 12 wherein at least one of said separation components is a vacuum swing adsorption component. 18. The system of claim 12 wherein said adsorption medium comprises one of (a) a molecular sieve, (b) a membrane. 19. A soil remediation system, comprising: an in-ground extraction well;a separation apparatus connected to receive extracted soil vapors from said extraction well and comprising a plurality of separation components, respective ones of said plurality of separation components adapted to separate a respective species contained in said extracted soil vapors, said plurality of separation components being connected in a succession to provide respective separated species flow streams of said respective species from the respective separation components;wherein a first one of said separation components is adapted to separate a first one of said respective species from said extracted soil vapors;a first dispersion apparatus comprising one of (a) an in-ground injection well or (b) an atmospheric vent, said first dispersion apparatus coupled to receive a species flow stream of a second one of said respective species from a second one of said separation components; anda second dispersion apparatus comprising one of (a) an in-ground injection well or (b) an atmosphere vent, said second dispersion apparatus coupled to receive the separated species flow stream of a third one of said respective species from a third one of said separation components. 20. The system of claim 19 further comprising: a third dispersion apparatus comprising one of (a) an in-ground injection well or (b) an atmosphere vent, said third dispersion apparatus coupled to receive a residual gas flow stream of a fourth species from said third one of said separation components. 21. The system of claim 20 wherein: said first species comprises water vapor and volatile organic compound gases;said second species comprises one of nitrogen, carbon dioxide or oxygen;said third species comprises another one of nitrogen, carbon dioxide or oxygen; andwherein said fourth species comprises the remaining one of nitrogen, carbon dioxide or oxygen. 22. The system of claim 19 further comprising a pump coupled to said first separation component. 23. A soil remediation system, comprising: an in-ground extraction well;a separation apparatus connected to receive extracted soil vapors from said extraction well and comprising a plurality of separation components, respective ones of said plurality of separation components adapted to separate a respective species contained in said extracted soil vapors, said plural separation components being connected in a succession to provide respective separated species flow streams of said respective species from the respective separation components;wherein a first one of said plurality of separation components is adapted to separate a first one of said respective species from said extracted soil vapors;a first dispersion apparatus comprising one of (a) an in-ground injection well or (b) an atmospheric vent, said first dispersion apparatus coupled to receive a species flow stream of a second one of said respective species from a second one of said separation components; anda second dispersion apparatus comprising one of (a) an in-ground injection well or (b) an atmosphere vent, said second dispersion apparatus coupled to receive a residual gas flow stream of a third and fourth species from said second one of said separation components. 24. A soil remediation system, comprising: an in-ground extraction well;a separation apparatus connected to receive extracted soil vapors from said extraction well and comprising first and second separation components, respective ones of said separation components adapted to separate a respective species contained in said extracted soil vapors, said first and second separation components being connected in a succession, respective ones of said separation components being adapted to provide a respective separated species flow stream of said respective species and a respective residual flow stream;plural dispersers, each of said dispersers comprising one of (a) an in-ground injection well or (b) an atmospheric vent, respective ones of said plural dispersers being coupled to receive a respective one of: (a) a separated species flow stream (b) a residual flow stream, from one of said separation components. 25. A soil remediation system, comprising: an in-ground extraction well;a separation apparatus connected to receive extracted soil vapors from said extraction well and comprising a plurality of separation components, respective ones of said plurality of separation components adapted to separate a respective species contained in said extracted soil vapors, said plurality of separation components being connected in a succession, each one of said separation components adapted to provide a respective separated species flow stream of a respective species and a respective residual flow stream;a plurality of dispersers, each of said dispersers comprising one of (a) an in-ground injection well or (b) an atmospheric vent, respective ones of said dispersers coupled to receive one of: (a) a separated species flow stream or (b) a residual flow stream, from a respective one of said separation components.