Liquid purification or separation – Flow – fluid pressure or material level – responsive
Patent
1996-12-18
1999-11-30
Reifsnyder, David A.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
210103, 210170, 2101981, 210602, 210614, 210739, 210743, C02F 332
Patent
active
059936495
ABSTRACT:
A low-cost water and wastewater treatment system having several embodiments achieves efficient contaminant removal in an environmentally "friendly" manner. The technology couples biological and passive chemical unit processes, and relies largely on pH changes to remove contaminants. A first embodiment focuses on a sequential two-unit treatment process consisting of a submersed aquatic vegetation (SAV) cell followed by a limerock (LR) bed. A second embodiment merges the two sequential treatments into one compartment where the LR bed is coincident with the SAV unit. A third embodiment describes the replacement of the SAV unit with a periphyton raceway unit, which is then followed sequentially by a LR bed. All three embodiments contain control elements for determining when and how much recycle within and flow between the treatment systems should occur, and if and when chemical addition should be performed.
REFERENCES:
patent: 764783 (1904-07-01), Van Choate
patent: 800187 (1905-09-01), Venable
patent: 968015 (1910-08-01), Wilkie
patent: 3385786 (1968-05-01), Klock
patent: 3635816 (1972-01-01), Golub
patent: 3770623 (1973-11-01), Seidel
patent: 4284510 (1981-08-01), Savard et al.
patent: 4415450 (1983-11-01), Wolverton
patent: 4824572 (1989-04-01), Scott
patent: 4872985 (1989-10-01), Dinges
patent: 4904386 (1990-02-01), Kickuth
patent: 4971690 (1990-11-01), Justice
patent: 5106504 (1992-04-01), Murray
patent: 5106511 (1992-04-01), Kodukula
patent: 5137625 (1992-08-01), Wolverton
patent: 5156741 (1992-10-01), Morrison et al.
patent: 5174897 (1992-12-01), Wengrzynek
patent: 5273653 (1993-12-01), Kickuth
patent: 5288406 (1994-02-01), Stein
patent: 5389257 (1995-02-01), Todd et al.
patent: 5486291 (1996-01-01), Todd et al.
patent: 5500131 (1996-03-01), Metz
patent: 5505862 (1996-04-01), Sonnenrein
patent: 5676836 (1997-10-01), Yamasaki et al.
Aquatic Plant Systems for Wastewater Treatment: Engineering Considerations, G. Tchobanoglous, Dept. of Civil Engineering, University of California, Davis, CA 95616; Excerpt from Aquatic Plants for Water Treatment and Resource Recovery, K.R. Reddy and W.H. Smith, pp. 27-48, 1987.
The Green Revolution in Wastewater Treatment, Becky Gillette, BioCycle, pp. 44-47, Dec. 1992.
A Report on the Use of Shredded Scrap Tires in On-site Sewage Disposal Systems, prepared by Envirologic, Inc., 139 Main Street, Brattleboro, VT 05301, for The Dept. of Environmental Conservation, State of Vermont, Recycling Market Development Grant, May 22, 1990.
A Pilot Study of Vertical Flow Wetlands at Coffs Harbour, New South Wales, Australia, A.J. Chick and D.S. Mitchell, Wat. Sci. Tech., vol. 32, No. 3, pp. 103-109, 1995.
DeBusk Thomas A.
Dierberg Edward F.
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