Dewatering a leach field

Liquid purification or separation – Processes – Treatment by living organism

Reexamination Certificate

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Details

C210S747300, C210S617000, C210S620000, C405S036000, C405S043000

Reexamination Certificate

active

06969464

ABSTRACT:
A leach field of a sewage system is dewatered, to restore its function when it is at or near failure. In various embodiments, water is withdrawn from the points in the leach field, preferably from the conduits, by means of suction or sub-atmospheric pressure. As water is drawn from the soil, air from the atmosphere or from an air mover enters resultant spaces in the soil, to restore the influence zone and better treat waste water. Forced air flow is used to fissure the soil, to aid dewatering, and separately, to restore the leach field.

REFERENCES:
patent: 4429647 (1984-02-01), Zinck
patent: 5200065 (1993-04-01), Sinclair et al.
patent: 5202027 (1993-04-01), Stuth
patent: 5383974 (1995-01-01), Johnson
patent: 5588777 (1996-12-01), Laak
patent: 5810514 (1998-09-01), Suchecki, Jr.
patent: 5827010 (1998-10-01), Hassett
patent: 6018909 (2000-02-01), Potts
patent: 6485647 (2002-11-01), Potts
patent: 2003/0173293 (2003-09-01), Potts
patent: 2004/0195177 (2004-10-01), Potts
patent: WO 9713593 (1997-04-01), None
patent: WO 9965573 (1999-12-01), None
“How Does Terralift 2000 Work?” undated, from www.terralift2000.com/homeowners/howitworks.html, 2 pages.
“Design Manual—Subsurface Sewage Disposal Systems” p. 89-91, State of Connecticut Department of Public Health (Jul. 1998).

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