Liquid purification or separation – Processes – Treatment by living organism
Reexamination Certificate
2000-02-11
2001-11-20
Simmons, David A. (Department: 1724)
Liquid purification or separation
Processes
Treatment by living organism
C210S774000, C210S180000, C210S181000, C210S532200, C159S905000, C203S010000, C203SDIG005
Reexamination Certificate
active
06319408
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is directed to waste-water treatment. It particularly concerns improvements in the use of septic tanks.
2. Background Information
Although many residents in the more-developed countries are served by common waste-water treatment facilities, individual septic systems provide that function for a large number of other residents. A residence or other waste-water source discharges its waste into a septic tank. Settling causes a relatively clear liquid layer to form between settled-out solids and buoyant materials that form a “mat” on top of the liquid layer. Water drains from the liquid layer into, say, a leach field. In the better-functioning systems, the leach field largely purifies the water before it reaches a water table from which well water is drawn.
Although septic systems have been quite effective in a large number of installations, many factors combine to make their capacities only marginal in many cases. Because of increases in population density and other siting factors, leach-field capacities have often been so low as to cause restrictions on shower and toilet use. This has resulted in large-scale efforts to reduce shower-head flow rate and per-flush water use. Few of these measures have been beneficial from the standpoint of user convenience and some have been counter-productive even as conservation measures. Moreover, even leach fields that seem to have more than adequate leaching capacity have often proved not to purify water adequately. So a great need has developed to increase septic-system improvement.
SUMMARY OF THE INVENTION
I have found that both effective septic-system capacity and resultant water quality can be greatly increased by using a distiller to recover water from the waste. In accordance with my invention, waste is drawn from the septic tank and directed to a distiller as distiller feed. In most embodiments of the invention, the bulk of the distiller residue would be returned to the septic tank, but most of the distillate would not. It would typically be reused, so it would not burden the leach field or other recipient of the septic tank's drainage. By thus enabling users to circumvent the leaching cycle, the present invention not only increases the septic system's effective capacity but also reduces required well capacity. Even if the distillate is discharged into the leach field, the system increases the resultant water quality.
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What is . . . Distillation. The Water Company. www.goodwater.com/wht-s-ds-htm., 1996.
Cesari and McKenna LLP
Lawrence Frank M.
Ovation Products Corporation
Simmons David A.
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