Patent ID: 6173526
Filing Date: 2001-01-16
Classification: A01B,A01C

Abstract:
Apparatus for benefication of soil by infusion of a treatment gas into sub-surface soil with the use of a pressurized irrigation stream, said apparatus comprising:a cavitating venturi-type mixer-injector having a body with an internal wall forming a flow passage therethrough, said flow passage having a central axis, an inlet, an outlet, and between said inlet and outlet said wall forming a constricting portion of deceasing diameter, a substantially cylindrical injector portion, and an expanding portion having an increasing diameter all as they progress in that order from inlet to outlet, an injection port, said injector port receiving treatment gas from a source of gas for injection into said flow passage to produce a water stream containing micro bubbles of treatment gas:an impermeable elongated conduit having a length and a peripheral wall forming a longitudinal passage for receiving water and treatment gas from said mixer-injector;a plurality of flow-restricting outlets disposed along the length of said conduit wall intended for placement beneath the soil surface, said outlets passing through said conduit wall to permit limited flow of water and entrained said mirco-bubbles into said soil from said longitudinal passage without substantial loss of pressure in said conduit;said mixer-injector adapted to be connected to a source of water under pressure, whereby treatment gas will be infused into said water as it flows through the flow passage in the mixer-injector, and said water will remain under super-atmospheric pressure until after it passes through as said flow restricting outlet to emit water containing treatment gas and said micro bubbles.