Liquid purification or separation – Processes – Treatment by living organism
Reexamination Certificate
2008-06-27
2009-12-15
Upton, Christopher (Department: 1797)
Liquid purification or separation
Processes
Treatment by living organism
C210S615000, C210S617000, C210S630000, C210S747300, C210S151000, C210S170080, C210S903000, C405S043000, C405S045000, C405S050000
Reexamination Certificate
active
07632408
ABSTRACT:
A passive drain field assembly reduces nitrogen in wastewater by facilitating nitrification and denitrification. A first chamber receives effluent into a multi-pipe bundle. An air vent is provided that extends from the atmosphere into the first chamber. A second chamber receives effluent from the first chamber, and contains a medium, beneath which is positioned a drainage pipe for releasing treated effluent into the soil therebeneath. A berm creates a retention area in the second chamber that is lined with a water-impermeable liner. In use, ammonia present in the effluent is converted to nitrate in the presence of the oxygen admitted by the air vent in the first chamber. The liquid retained upstream of the berm and above the liner undergoes anaerobic reactions. The remaining liquid proceeds to a place in the second chamber from which the drainage pipe can be entered, from which the treated wastewater can enter the soil.
REFERENCES:
patent: 848279 (1907-03-01), Ashley
patent: 2366522 (1945-01-01), Gutman
patent: 3060693 (1962-10-01), Taylor
patent: 3403519 (1968-10-01), Balko
patent: 3441140 (1969-04-01), Thurber
patent: 3698195 (1972-10-01), Chapin
patent: 4019326 (1977-04-01), Herveling et al.
patent: 4134268 (1979-01-01), Elmore
patent: 4188154 (1980-02-01), Izatt
patent: 4246305 (1981-01-01), Delattre
patent: 4465594 (1984-08-01), Laak
patent: 4588325 (1986-05-01), Seefert
patent: 4799822 (1989-01-01), Wintermantel et al.
patent: 4824287 (1989-04-01), Tracy
patent: 4904112 (1990-02-01), McDonald
patent: 4907385 (1990-03-01), Biodrowski
patent: 4950103 (1990-08-01), Justice
patent: 5015123 (1991-05-01), Houck et al.
patent: 5074708 (1991-12-01), McCann, Sr.
patent: 5087151 (1992-02-01), DiTullio
patent: 5318699 (1994-06-01), Robertson et al.
patent: 5378357 (1995-01-01), Houck et al.
patent: 5516229 (1996-05-01), Atchley et al.
patent: 5520481 (1996-05-01), Atchley et al.
patent: 5951866 (1999-09-01), Grove et al.
patent: 6428691 (2002-08-01), Wofford
patent: 6540910 (2003-04-01), Schwarzenegger et al.
patent: 7081203 (2006-07-01), Helm
patent: 7144509 (2006-12-01), Boyd et al.
patent: 7510649 (2009-03-01), Lavigne
patent: 2003/0070971 (2003-04-01), Kim
patent: 2004/0112809 (2004-06-01), Hassett
patent: 2004/0253054 (2004-12-01), Atchley
patent: 2040151 (1980-08-01), None
patent: 1069720 (1984-01-01), None
patent: 1442605 (1988-07-01), None
Allen Dyer Doppelt Milbrath & Gilchrist
Plastic Tubing Industries, Inc.
Upton Christopher
LandOfFree
Passive drain field system for wastewater treatment and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Passive drain field system for wastewater treatment and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Passive drain field system for wastewater treatment and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4077269