US20090145830A1 - Subsurface sewage disposal and wastewater treatment system - Google Patents
Subsurface sewage disposal and wastewater treatment system Download PDFInfo
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- US20090145830A1 US20090145830A1 US12/328,068 US32806808A US2009145830A1 US 20090145830 A1 US20090145830 A1 US 20090145830A1 US 32806808 A US32806808 A US 32806808A US 2009145830 A1 US2009145830 A1 US 2009145830A1
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- Prior art keywords
- elongated member
- subsurface
- leach field
- effluent
- fabric
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/04—Aerobic processes using trickle filters
- C02F3/046—Soil filtration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/006—Water distributors either inside a treatment tank or directing the water to several treatment tanks; Water treatment plants incorporating these distributors, with or without chemical or biological tanks
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2866—Particular arrangements for anaerobic reactors
- C02F3/288—Particular arrangements for anaerobic reactors comprising septic tanks combined with a filter
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
- E03F1/002—Methods, systems, or installations for draining-off sewage or storm water with disposal into the ground, e.g. via dry wells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Definitions
- leach fields of greater treatment area and greater storage capacity per linear foot can be achieved by stacking modules, for example, placing a first subsurface sewage disposal system 10 including a first module (e.g., the box 30 or the frame 200 and the elongated member 20 ) in an excavated leach field area, and placing a second subsurface sewage disposal system 10 including a second module above the first module.
- a first module e.g., the box 30 or the frame 200 and the elongated member 20
- second subsurface sewage disposal system 10 including a second module above the first module.
- effluent is supplied to the upper, second module as described above, and pipes interconnecting the first and second modules would hydraulically pass effluent to the lower, first module.
- the effluent flow is divided between the stacked modules to form a treatment train.
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- Life Sciences & Earth Sciences (AREA)
- Water Supply & Treatment (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Microbiology (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Public Health (AREA)
- Health & Medical Sciences (AREA)
- Processing Of Solid Wastes (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
A modular subsurface sewage disposal and wastewater treatment system is presented for treating effluent from a septic tank. The system includes an elongated member, leach field medium and at least one pipe. The elongated member is arranged in one of a serpentine or a ladder-shaped configuration and includes a core wrapped in a fabric. The medium is disposed about open areas in the configuration. The pipe uniformly distributes effluent from the septic tank to the elongated member. In one embodiment, the core is a pliable plastic membrane and the fabric wrap is a non-woven fabric. In one embodiment, the elongated member is disposed in a box and retained by an adhesive to permit ease of manufacture, shipping, and installation. In another embodiment, the elongated member is disposed in a rigid or semi-rigid frame defining channels retaining the elongated member. The frame is detectable by a non-invasive above surface detector.
Description
- This patent application claims priority benefit under 35 U.S.C. § 119(e) of copending, U.S. Provisional Patent Applications, Ser. Nos. 60/992,762, filed Dec. 6, 2007, and 61/092,420, filed Aug. 28, 2008. The disclosures of these U.S. patent applications are incorporated by reference herein in their entireties.
- A portion of the disclosure of this patent document contains material that is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent files or records, but otherwise reserves all copyright rights whatsoever.
- 1. Field of the Invention
- The present invention relates generally to septic systems for the treatment of sewage and wastewater and, more particularly, relates to a modular, self-contained subsurface sewage disposal/wastewater treatment system that provides improved biomat formation, improved distribution and treatment of effluent within a leach field of the system, and that is detectable within the leach field for post installation location and inspection.
- 2. Related Art
- Septic systems, also known as subsurface sewage disposal/wastewater treatment systems, are extensively used to treat sewage and wastewater from individual residences, businesses, schools, churches, military bases, or like residential and/or commercial structures, in areas not served by sewers. In the treatment of sewage and wastewater by septic systems, solid and liquid waste from these structures, is collected in a septic tank. Because of the different densities of solid and liquid waste, the solid and liquid components of the sewage separate. The solid material is at least partially decomposed within the tank by the action of aerobic, facultative and anaerobic bacteria, resulting in a liquid effluent. The liquid effluent, which may contain suspended solids, is then conveyed out of the tank and distributed through an area of subterranean soil, which is typically referred to as a drain or leach field. The liquid effluent is passed to a series of stone or sand trenches or chambers within the leach field. The effluent percolates through the chambers and soil for treatment to reduce contaminants before being mixed with the underground water table.
- Leach fields are typically divided into a number of portions (e.g., the aforementioned trenches and chambers) as dictated by the sewage treatment requirements of the structure serviced. Preferably, the effluent is distributed to the portions over a wide area to avoid, or at least substantially minimize, over-saturation of any one portion of the leach field. A plurality of underground tubes or pipes connects the septic tank to each of the portions of the leach field. Due in part to excavation needed to reach subsurface components as well as associated material and labor costs, the installation, repair and re-installation of the components of the septic system can be relatively expensive.
- As can be appreciated, it is desirable to minimize installation costs and to extend the useful life of a septic system to minimize maintenance and repair costs. It is also desirable to maximize the density of treatment surfaces within each linear unit of leach field length to ultimately reduce or at least minimize the leach field area. It is further desirable to maximize the leach field's ability to evenly distribute wastewater across the full expanse of wastewater treatment surface provided by the leach field components. It is additionally advantageous to provide subsurface components that can be detected above the surface to permit post installation location for inspection and/or future maintenance.
- The inventors have found that the conventional use of stone as a treatment medium can result in premature failure of a septic system leach field as the stone may be “dirty,” for example, contain contaminants or fine particles that may obstruct proper flow within the system and reduce percolation into the surrounding soil. As such, the exclusion of stone as a treatment medium is a desirable improvement over the existing art.
- The present invention resides in one aspect in a modular subsurface sewage disposal and wastewater treatment system for treating effluent passed from a septic tank. The system includes an elongated member arranged in a predetermined configuration, where the elongated member includes a core structure wrapped in a fabric. The system further includes a leach field medium disposed about open areas defined by the predetermined configuration and under the elongated member, and a pipe having an outlet for uniformly distributing effluent from the septic tank to the elongated member and from the elongated member to the leach field medium. In one embodiment, the predetermined configuration of the elongated member includes a serpentine-shaped form. In another embodiment, the predetermined configuration of the elongated member includes a ladder-shaped form.
- In one aspect of the invention, the modular subsurface system further includes a box for retaining the elongated member and an adhesive for holding the elongated member within the predetermined configuration within the box. In one embodiment, the predetermined configuration within the box includes at least one of a serpentine-shaped form and a ladder-shaped form.
- In another aspect of the invention, the modular subsurface system further includes a frame having a plurality of support members. Adjacent support members of the frame define a plurality of channels, where the channels retain the elongated member within the predetermined configuration. In one embodiment, the frame is comprised of at least one of a rigid and semi-rigid material.
- In yet another aspect of the invention, the subsurface system includes a first set of the elongated member, the leach field medium and the pipe disposed in a leach field area, and a second set of the elongated member, the leach field medium and the pipe disposed in the leach field area, and an interconnectivity feature coupling the pipe of the first set and the pipe of the second set together for uniformly distributing the effluent from the septic tank to the elongated members within both of the first set and the second set. In one embodiment, the first set and the second set are arranged in one of a side-by-side arrangement and a vertically stacked arrangement.
- The features and advantages of the present invention will be better understood when the Detailed Description of the Preferred Embodiments given below is considered in conjunction with the figures provided.
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FIG. 1 is a perspective view of a modular subsurface sewage disposal and wastewater treatment system in accordance with one embodiment of the present invention; -
FIG. 2 is a partial, cross-sectional view of an elongated member of the modular subsurface sewage disposal and wastewater treatment system ofFIG. 1 taken along line 2-2; -
FIG. 3A is a partial, cross-sectional view of the modular subsurface sewage disposal and wastewater treatment system ofFIG. 1 taken along line 3-3; -
FIG. 3B is an enlarged detail view of an outlet of a distribution pipe directing effluent into an elongated member in accordance with one embodiment of the present invention; -
FIGS. 4 and 5 are perspective views of a modular subsurface sewage disposal and wastewater treatment system in accordance with one embodiment of the present invention; -
FIG. 6 is a perspective view of a pair of modular subsurface sewage disposal and wastewater treatment system arranged in a side-by-side arrangement providing an increased effective leach area and storage capacity in accordance with one embodiment of the present invention; -
FIG. 7 illustrates an outlet for directing effluent into the elongated member of the modular subsurface sewage disposal and wastewater treatment system in accordance with one embodiment of the present invention; -
FIG. 8 is a top plan view of an elongated member of a modular subsurface sewage disposal and wastewater treatment system in accordance with one embodiment of the present invention; -
FIGS. 9A and 9B are partial, cross-sectional views of the elongated member of the modular subsurface sewage disposal and wastewater treatment system ofFIG. 8 taken along line 9-9; -
FIGS. 10 and 11 are partial, cross-sectional plan views of elongated members of the modular subsurface sewage disposal and wastewater treatment system ofFIG. 8 in accordance with other embodiments of the present invention; and -
FIG. 12 is a schematic plan view of modular subsurface sewage disposal and wastewater treatment systems of the present invention coupled in a series arrangement to service a structure of interest. - In these figures like structures are assigned like reference numerals, but may not be referenced in the description of all figures.
- The present invention is directed to a modular, self-contained and fully assembled subsurface sewage disposal/wastewater treatment system for use in an improved leach field arrangement. The system includes integrated interconnecting features at multiple locations to allow interchangeability of modules as well as adaptation to requirements of various individual structural and site requirements as well as goals of sewage and wastewater treatment as described herein.
- In one embodiment, illustrated in
FIG. 1 , the subsurface sewage disposal/wastewater treatment system is comprised of a modular, self-contained and fully assembled subsurface sewage disposal system, shown generally at 10. The subsurface sewage disposal/wastewater treatment system 10 treats solid and liquid waste from a residence, business, park or recreational area, school, church, military base, or like environment where treatment of solid and/or liquid waste is needed. As shown inFIGS. 1 and 8 , the subsurface sewage disposal/wastewater treatment system 10 includes acore structure 12 wrapped in afabric 14 and arranged in an Euclidean geometric form such as, for example, an elongated, serpentine-shaped form 300 (FIG. 1 ), ladder-shaped form 400 (FIG. 8 ), or other geometric forms such as a U-shaped form, a multiple U-shaped plane form and combinations of the above-described geometric forms. In one embodiment, the fabric wrapped core structure is configured in accordance with the mathematics of fractal geometry. In one embodiment, thecore structure 12 is wrapped in thefabric 14 such that alower surface 13 of the core structure 12 (FIG. 2 ) is open and exposed to treatment media (described below). - As described herein, the ladder-
shape form 400 includes a geometric shape having at least two paralleleffluent distribution legs 410 and a plurality ofeffluent distribution rungs 420 arranged between and affixed directly to or directly abutting theparallel legs 410 in a generally perpendicular pattern as shown inFIGS. 8-11 . In one embodiment, core structures of one ormore rungs 420 are coupled to core structures of one or more of thelegs 410. For example, as illustrated inFIG. 9A , acore structure 12 a of one of therungs 420 is coupled to acore structure 12 b of one of thelegs 410 by, for example, aflexible connection 404. As also shown inFIG. 9A , thefabric 14 wrapping the core structures is continuous on an outer surface of thecore structures fabric 14 is draped over thecore structures fabric 14 exposes lower surfaces of thecore structures lower surface 13 of thecore structures FIG. 9B , acore structure 12 c of one of therungs 420 abuts acore structure 12 d of one of thelegs 410. As also shown inFIG. 9B , thefabric 14 includes afabric portion 14 a wrapping thecore structure 12 d and afabric portion 14 b wrapping thecore structure 12 c. In one embodiment thefabric portions portions FIGS. 10 and 11 , acore structure 12 e of one of therungs 420 abuts acore structure 12 f of one of thelegs 410. As also shown inFIGS. 10 and 11 , thefabric 14 includes afabric portion 14 d individually wrapping thecore structure 12 e and afabric portion 14 e individually wrapping thecore structure 12 f. - Referring again to
FIG. 1 , in one embodiment, thecore structure 12 is comprised of a pliable plastic membrane fabricated from, for example, polystyrene, polyethylene or a similar polymer. In one embodiment, thecore structure 12 is comprised of an open or semi-open area surrounded by, for example, a permeable or semi-permeable plate or rib, such as a metallic or plastic plate or rib, that holds thefabric 14 wrapped about exterior surfaces of thecore structure 12 apart. It should be appreciated that the permeable or semi-permeable plate or rib embodiment forms an essentially open cored elongated member (as is described below) wrapped in thefabric 14. - In one embodiment, the membrane of the
core structure 12 includes opposing protrusions extending outwardly from thecore structure 12 so as to maintain a separation between a body of thecore structure 12 and thefabric 14 surrounding thecore structure 12. In one embodiment, the membrane of thecore structure 12 possesses characteristics (e.g., is semi-rigid and flexible) such that thecore structure 12 can adapt configurations including the aforementionedserpentine form 300 andladder form 400 having about ninety-degree (90°) angles, shown inFIG. 1 generally at 100 andFIGS. 8 and 9 generally at 402, and abutting or coupled members. In one embodiment, thefabric 14 is comprised of a non-woven fabric such as geotextile fabrics as are commercially available under brand names TYPAR 3401 and 140EX from Thrace-Linq, Inc. (Summerville, S.C., USA) which possess qualities including, for example, effective open pore spaces that allow minimal restriction to passage of water and liquid sewage effluent there through, and are durable to withstand indeterminate lengths of time buried within soil and/or are in a continuously saturated condition. In accordance with the present invention, thecore membrane 12 andnon-woven fabric 14 do not degrade or decompose when subjected to long-term immersion in water, sewage or when buried within soils. -
FIG. 2 is a cross-sectional view of thecore structure 12 andfabric wrap 14 taken along line 2-2 ofFIG. 1 . In one embodiment, thecore structure 12 and thefabric wrap 14 form anelongated member 20 that is about, but not limited to, six inches (6 in.) in height by about one inch (1 in.) thick. In other embodiments, theelongated member 20 is about, for example, one of seven inches (7 in.), twelve inches (12 in.), thirteen inches (13 in.), and twenty-six inches (26 in.) in height. In one embodiment, theelongated member 20 is arranged in the serpentine form 300 (FIG. 1 ) or ladder form 400 (FIG. 8 ) and disposed in asupport structure 30 such as, for example, a five-sided corrugated cardboard box having a length L and a width W. In one embodiment, illustrated inFIG. 1 , afirst side 32 of thebox 30, corresponding to width W, is about, for example, forty-eight inches (48 in.) in length, and asecond side 34 of thebox 30, corresponding to length L, is about, for example, sixty-eight inches (68 in.) in length. Thus, theserpentine form 300 of theelongated member 20 is retained within about forty-eight inches (48 in.) in width and about sixty-eight inches (68 in.) in length. As shown inFIG. 1 , afirst side 22 ofserpentine form 100 of theelongated member 20 is parallel to thesecond side 34 of thecardboard box 30 while bends, shown generally at 24, in theserpentine form 300 of theelongated member 20 are parallel to thefirst side 32 of thebox 30. In one embodiment, theelongated member 20 is held in place within thebox 30 with abiodegradable adhesive 40. In another embodiment, theelongated member 20 is held in place with a friction fit between tabs or protrusions (not shown) projecting from the walls of thebox 30. As should be appreciated, the protrusions, adhesive 40 and thebox 30 are structural components of the subsurfacesewage disposal system 10 which allow ease of manufacture, shipping, and installation, and which combine to contribute, for example, to modular aspects of the present invention. - In one embodiment, illustrated in
FIGS. 4 and 5 , theelongated member 20 is arranged in theserpentine form 300 and disposed in a support structure including a rigid orsemi-rigid frame 200. It should be appreciated that the ladder-shapedform 400 may similarly be disposed in thesupport structure 200. In one embodiment, the rigid orsemi-rigid frame 200 is comprised of, for example, ferrous or non-ferrous wire, plastic, cellulose, timber, plant-derived man-made fibrous substance, or like petroleum or hydrocarbon based materials. As shown inFIG. 5 , theframe 200 includes a plurality ofsupport members 210 arranged to define a plurality ofchannels 220 betweenadjacent support members 210 such as, for example,channels 220 a-220 j. As such, the adjacent ones of the plurality ofsupport members 210 cooperate such that theelongated member 20 is retained within thechannels 220 by, for example, a friction fit withcorresponding support members 210. In one embodiment, a plurality of ties or fasteners (not shown) may couple theelongated member 20 to theframe 200. In one embodiment, illustrated inFIGS. 3-8 , an effluent/wastewater distribution pipe 42 is coupled to a portion of the frame members 200 (e.g., a top portion) and is directly connected to theelongated member 20 for uniformly and consistently introducing effluent to theelongated member 20 and then to the treatment medium. Each effluent/wastewater distribution pipe 42 includes aninterconnectivity feature 120. In one embodiment, theinterconnectivity feature 120 is one of a male or a female coupling, fitting or adapter for joining sections of pipe. As shown inFIG. 5 , a first end of thedistribution pipe 42 includes afemale coupling 122 and a second end of thepipe 42 includes amale coupling 124 or, simply, an unobstructed end of thepipe 42. As shown inFIG. 12 , a plurality of interconnectivity features 120 couple thedistribution pipes 42 of a plurality ofmodules 10 in a series arrangement of, for example, two rows and N columns. The plurality ofmodules 10 are coupled to discharge outlets orports 512 of a sewage disposal and/or wastewater treatment vessel such as, for example, adistribution tank 510 and/or aseptic tank 520, for directing a flow of effluent (depicted by arrows A) from a structure ofinterest 500 through thevessel elongated members 20 of themodules 10 and approvedleach field medium 51 disposed between portions of the members 20 (described below) for treatment. As can be appreciated, the interconnectivity features 120 couple thedistribution pipes 42 of an arrangement of two or more modules 10 (e.g., the above described arrangement of rows and columns ofmodules 10 that may vary to suit the treatment requirements of the structure of interest 500) for directing the flow of effluent from thestructure 500 to the two ormore modules 10. In one embodiment, alast module 10 coupled in an arrangement of modules 10 (e.g., at an end of a row) is terminated with a capping device 130 (FIG. 4 ) such as, for example, a plug or cap end. In another embodiment, thedistribution pipes 42 of the two ormore modules 10 are coupled together to form a closed loop arrangement (FIG. 12 ). As shown inFIG. 12 , theinterconnectivity feature 120 allows connection of a series ofmodules 10 of seemingly any desired length to meet the requirements of a particular leach field design. - As is generally known, a leach field is prepared by excavating soil in a predetermined area surrounding a structure (e.g., residential, commercial, recreational, military, or the like) serviced by the sewage disposal/wastewater treatment system. Treatment components of the subsurface sewage disposal/wastewater treatment system are then installed into the area of the previously prepared soil. In one embodiment, the prepared soil may be supplemented by introducing a highly permeable material such as, for example, sand. In accordance with the present invention, the
box 30 or theframe 200 that contains theelongated member 20 arranged in theserpentine form 300 or ladder-shapedform 400 along with a supplied integral effluentdistribution piping system 42, is disposed in the excavated area and on the prepared soil. As noted above, the adhesive 40 and thebox 30, orsupport member 210 andchannels 220, cooperate to provide structural support to theelongated member 20 such that installation is not labor intensive. For example, one or two persons may dispose thebox 30 orframe 200 containing theelongated member 20 and thepiping system 42 in the excavated area with relative ease. Once disposed in the excavated area little, if any, subsequent alignment of theelongated member 20 is needed. Rather, once thedistribution piping system 42 is coupled to the supply of effluent, themodules 10 are operational. As noted below, in one embodiment, treatment medium is placed about open areas defined by theelongated member 20. This efficient manner of installation is a marked improvement over conventional installation procedures. For example, the inventors have discovered that ease of installation is afforded the inventive subsurface sewage disposal/wastewater treatment system 10 by its novel, intact structural integrity provided by the adhesive 40 orchannels 220, the serpentine or ladder-shapedmembrane 12 wrapped infabric 14, the support structure (e.g., thebox 30 or frame 200) and the incorporateddistribution piping system 42. The efficient installation procedures also extend to multiple modules installation. For example, after a first one 10′ of the inventive subsurface sewage disposal/wastewater treatment system 10 is laid into an open excavation (as described above), asecond one 10″ of the inventive subsurface sewage disposal/wastewater treatment system 10 may be placed along side thefirst system 10′ as is shown in, for example,FIG. 6 . The two respectivedistribution piping systems 42 are couplable, e.g., are inter-connectable via mating connectivity features 120, to uniformly distribute effluent between thesystems 10′ and 10″. Suitable sealing means, as are generally known in the art, may be employed at the junctures of the two or more subsurface sewage disposal/wastewater treatment systems 10. The process of coupling sewage disposal/wastewater treatment systems 10 may be repeated without restriction until a desired length and/or width of a sewage disposal/wastewater treatment system leach field is achieved such as is illustrated inFIG. 12 . - With the support structure (e.g., the
box 30 or frame 200) and theelongated member 20 in place,open areas serpentine form 300 of member 20 (and corresponding areas betweenadjacent channels 220 of the frame 200) are filled with approvedleach field medium 51 such as, for example, washed sand of particular gradation. Similarly,open areas form 400 ofmember 20 are filled with the approvedleach field medium 51. In one embodiment, theopen areas open areas leach field medium 51 is also disposed at a depth of about two inches (2 in.) to about six inches (6 in.) directly beneath the support structure (e.g., thecardboard box 30 or frame 220) in addition to an area of about two inches (2 in.) to about six inches (6 in.) immediately surrounding thecardboard box 30 on each of itssides frame 200. - With the support structure (e.g., the
box 30 or frame 200), theelongated member 20 and the medium 51 in place, effluent is supplied to theelongated member 20 by thepipes 42 that run across a surface (e.g., a top surface) of the serpentine/ladder-shape configuration, as is illustrated inFIGS. 3A , 6, 7, 8 and 12.FIG. 3A is a cross-sectional view taken along line 3-3 ofFIG. 1 . As shown inFIG. 3A , thepipes 42 include at least oneoutlet 44 for directingeffluent 80 down into theelongated member 20. In another embodiment, illustrated inFIGS. 6 and 7 , thepipe 42 include at least twooutlets 44′ and 44″ for directingeffluent 80 down into theelongated member 20. In yet another embodiment, theeffluent 80 is directed down into the at least one of thelegs 410 and therungs 420. For example, as illustrated inFIG. 8 , theeffluent 80 is directed by a plurality ofoutlets 44 down into a plurality of therungs 420. As is generally known, effluent is supplied by gravity flow, pressurized flow, or combinations thereof. In one embodiment illustrated inFIG. 3B , theoutlet 44 includes a fitting 92 (e.g., “T” or “Y” shaped fitting) and a section ofpipe 94 coupled to and extending from the fitting 92. In one embodiment, thepipe 94 includes aslot 96 configured to receive a width of theelongated member 20 therein. In one embodiment, illustrated inFIGS. 3A , 3B and 7, theelongated member 20 includes a portion having a break or cut in thefabric 14 such that thecore member 12 is received in theslot 96 and thefabric 14 covers an outer surface of the 94. In one embodiment, ashroud 98 is disposed about theoutlet 44 such that theshroud 98 covers an area of engagement of thecore member 12 and theslot 96. For example, theshroud 98 may include a central bore that accepts thepipe 94 and a portion of the fitting 92 to allow theshroud 98 to be disposed between the fitting 92 and thecore member 12. In one embodiment, theshroud 98 is comprised of the aforementioned geotextile fabric. In one embodiment, theshroud 98 is coupled, joined or bonded such as, for example, by gluing, sewing, fastening with pins, stapling and the like, ultrasonic welding, and like methods and means for securing, to thefabric 14. In one embodiment, theshroud 98 is secured about the fitting 92 by, for example, a tie or clamp (not shown). - As noted above and shown in
FIGS. 6 and 12 , it should be appreciated that one or more of the modular subsurface sewage disposal/wastewater treatment systems 10 can be disposed within an excavated area to achieve a leach field of desired characteristics to service a structure of interest (e.g., a residential, commercial, recreational, school, church, military or like structure). For example, two or more modular subsurface disposal/wastewater treatment systems 10′ and 10″ (e.g.,boxes 30 or frames 200 each including anelongated member 20 and approved leach field medium), can be disposed side-by-side to form rows in the leach field. Similarly, two or more modular sewage disposal/wastewater treatment systems 10 may be coupled in linear series to provide a desired length for each of the one or more rows and columns within the leach field. In one embodiment, the rows are, for example, about sixty-eight inches (68 in.) wide and are, for example, of a length that is a multiple of about forty-eight inches (48 in.). A maximum length of a row is dictated by local regulatory restrictions of city or town building and/or health departments and/or agencies, or by engineering Best Management Practices, as are generally known in the art. As such, each row and/or column may include two or more modularsubsurface disposal systems 10 as is required to meet particular sewage disposal/wastewater treatment needs. It should be appreciated that while the modularsubsurface disposal system 10 is described above as being of particular height, length and width, it is within the scope of the present invention to vary these dimensions as needed to address a variety of sewage disposal/wastewater treatment requirements. It can be further appreciated that the above described system may have a height dimension of between, for example, about three inches (3 in.) and about forty-eight inches (48 in.) individually or in a stacked arrangement, and can be used when the treatment system is disposed in or on the earth in a longitudinal linear fashion. When the above described disposal/treatment system is installed in a predominantly vertical tower-like (e.g., stacked) configuration the height of the invention may have unlimited proportions. - With respect to leach field characteristics, in accordance with the present invention, biological treatment of effluent occurs within an area of approved leach
field treatment medium 51 that is disposed adjacent to and below theelongated member 20. That is, the medium 51 may be disposed within and below theopen areas serpentine form 300 of member 20 (FIG. 1 ), theopen areas form 400 of the elongated member 20 (FIG. 8 ), as well as corresponding areas between thechannels 220 of theframe 200 and, in particular, adjacent to vertical 20 a and bottom 20 b fabric covered surfaces of the elongated member 20 (FIG. 2 ), as well as the areas surrounding and under thebox 30 and/orframe 200. It should be appreciated, however, that aninternal area 70 proximate to each of thebends elongated member 20 will not provide treatment to effluent discharged from each ofsurfaces 101 to the same degree as from theopen areas serpentine form 300,open areas form 400, and between runs of the elongated member 20 (e.g., vertical 20 a and bottom 20 b fabric covered surfaces of the elongated member 20) and areas surrounding and under thebox 30 and/orframe 200. As such, thesurfaces 101 are discounted in a determination of an effective leach area. In one embodiment, theinternal area 70 spans about four inches (4 in.) in length from each of thebends 24. Accordingly, and in accordance with one embodiment of the present invention, a total surface area of theelongated member 20 that provides effluent treatment within a leach area is about fifty-seven square feet (57 sq. ft.). As is generally known in the art, effluent treatment is a function of the provided leach treatment area. - It should be appreciated that leach fields of greater treatment area and greater storage capacity per linear foot can be achieved by stacking modules, for example, placing a first subsurface
sewage disposal system 10 including a first module (e.g., thebox 30 or theframe 200 and the elongated member 20) in an excavated leach field area, and placing a second subsurfacesewage disposal system 10 including a second module above the first module. In such a stacked configuration, effluent is supplied to the upper, second module as described above, and pipes interconnecting the first and second modules would hydraulically pass effluent to the lower, first module. In another embodiment, the effluent flow is divided between the stacked modules to form a treatment train. - In one aspect of the invention, the aforementioned module includes the
box 30 orframe 200 andelongated member 20 that is about forty-eight inches (48 in.) wide by about sixty-eight inches (68 in.) long is reduced in size. For example, in one embodiment, a similarly functioning module is configured as about thirty inches (30 in.) long by about forty-eight inches (48 in.) wide, with the long lengths of the serpentine/ladder-shaped forms parallel to the thirty inch (30 in.) dimension. The reduced sized subsurface sewage disposal/wastewater treatment system module provides an effective leach area of approximately one half of the previously described system for square feet per linear foot of leach field and storage capacity. It should be appreciated that the reduced sized module may also be used side-by-side or stacked in multiple unit arrangements, as discussed above. Additionally, it should be appreciated that the larger and reduced sized modules may be connected in various arrangements within one system as sewage disposal and/or wastewater treatment requirements for a particular implementation dictate. - As described herein, the inventors have discovered that subsurface sewage disposal/
wastewater treatment systems 10 including one or more of the modules (e.g., thebox 30 orframe 200 and theelongated member 20 disposed therein in a serpentine/ladder-shaped form) provide improved biomat formation and effluent treatment. The disclosed system and novel configuration substantially eliminates areas of competing biomat that is a perceived deficiency with conventional arrangements. In other words, the novel arrangements as described herein minimize, if not eliminate, completing biomat areas such that the areas do not interfere with, and thus negate each other. Additionally, the aforementioned arrangements provide for distribution which ensures that areas of unwanted prolonged saturation within the treatment medium does not occur and, as such, provides for uniformly oxygenated biomat development that is seen as an improvement over conventional systems that merely include random disbursement of effluent and thus random and poorly oxygenated biomat development. Moreover, superior treatment of effluent is achieved by maximizing the density of treatment surfaces within each linear unit of leach field length. - Yet another perceived improvement over conventional systems results from the use of the
frame 200 comprising a metal including ferrous or non-ferrous material such as, for example, wire. In this embodiment, the location of the subsurface (e.g., buried)system 10 can be identified without excavation by use of, for example, a metal or other ferrous material detector. As can be appreciated, the ability to detect the location of the buried system without excavation provides significant advantages in time and cost of repairing and maintaining thesystem 10. Additionally, the use of an above surface detector may permit non-invasive inspection of key elements of the system to ensure that installation was performed to specification such as, for example, in the designed location and/or configuration to achieve the desired sewage disposal and/or wastewater treatment. In one embodiment, thebox 30 orframe 200 is comprised of a material that is not detectable by a non-invasive above surface detector, but has incorporated in its construction a feature or features (e.g., retaining clips, fasteners, and the like) that are detectable by the non-invasive above surface detector. - Although this invention has been shown and described with respect to the detailed embodiments thereof, it will be understood by those of skill in the art that various changes may be made and equivalents may be substituted for elements and steps thereof without departing from the scope of the invention. In addition, modifications may be made to adapt a particular situation to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed in the above detailed description, but that the invention will include all embodiments falling within the scope of the above description.
Claims (20)
1. A subsurface sewage disposal and wastewater treatment system for treating effluent passed from a septic tank, the system comprising:
an elongated member arranged in a predetermined configuration, the elongated member including a core structure wrapped in a fabric;
leach field medium disposed about open areas defined by the predetermined configuration and under the elongated member; and
a pipe having an outlet for uniformly distributing effluent from the septic tank to the elongated member and from the elongated member to the leach field medium.
2. The subsurface system of claim 1 , wherein the predetermined configuration includes a serpentine-shaped form.
3. The subsurface system of claim 1 , wherein the predetermined configuration includes a ladder-shaped form.
4. The subsurface system of claim 1 , wherein the predetermined configuration includes a form defined by the mathematics of fractal geometry.
5. The subsurface system of claim 1 , wherein the core structure is comprised of a pliable plastic membrane.
6. The subsurface system of claim 1 , wherein the core structure is comprised of at least one of an open and a semi-open area surrounded by at least one of a permeable and a semi-permeable plate and rib that holds the fabric wrapped about exterior surfaces of the core structure apart.
7. The subsurface system of claim 1 , wherein the fabric wrap is comprised of a non-woven fabric.
8. The subsurface system of claim 1 , further comprising:
a box for retaining the elongated member; and
an adhesive for holding the elongated member within the predetermined configuration within the box.
9. The subsurface system of claim 8 , wherein the predetermined configuration includes at least one of a serpentine-shaped form and a ladder-shaped form.
10. The subsurface system of claim 1 , further comprising:
a frame having a plurality of support members, adjacent support members defining a plurality of channels;
wherein the channels retain the elongated member within the predetermined configuration.
11. The subsurface system of claim 10 , wherein the frame is comprised of at least one of a rigid and semi-rigid material.
12. The subsurface system of claim 11 , wherein the rigid and semi-rigid material includes at least one of ferrous and non-ferrous wire, plastic, cellulose, timber, a plant-derived man-made fibrous substance, and petroleum and hydrocarbon based materials.
13. The subsurface system of claim 10 , wherein the channels retain the elongated member by a friction fit between adjacent support members.
14. The subsurface system of claim 10 , wherein the channels retain the elongated member with at least one of a plurality of ties and fasteners to couple the elongated member to adjacent support members.
15. The subsurface system of claim 10 , wherein the frame is comprised of a material that is detectable by a non-invasive above surface detector.
16. The subsurface system of claim 15 , wherein the frame is comprised of a ferrous material and the detector is a metal detector.
17. The subsurface system of claim 1 , including:
a first set of the elongated member, the leach field medium and the pipe disposed in a leach field area; and
a second set of the elongated member, the leach field medium and the pipe disposed in the leach field area; and
an interconnectivity feature coupling the pipe of the first set and the pipe of the second set together for uniformly distributing the effluent from the septic tank to the elongated members within both of the first set and the second set.
18. The subsurface system of claim 17 , wherein the first set and the second set are arranged in one of a side-by-side arrangement and a vertically stacked arrangement.
19. The subsurface system of claim 1 , wherein the leach field medium is comprised of sand including a highly predictable and definable composition by percentage of grain size.
20. A subsurface sewage disposal and wastewater treatment system for treating effluent passed from a septic tank, the system comprising:
an elongated member arranged in a predetermined configuration, the elongated member including a core structure wrapped in a fabric;
a frame having a plurality of support members, adjacent support members defining a plurality of channels, the channels retaining the elongated member within the predetermined configuration;
leach field medium disposed about open areas defined between the plurality of channels and under the frame; and
a pipe having an outlet for uniformly distributing effluent from the septic tank to the elongated member and from the elongated member to the leach field medium.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US12/328,068 US20090145830A1 (en) | 2007-12-06 | 2008-12-04 | Subsurface sewage disposal and wastewater treatment system |
PCT/US2009/066749 WO2010065840A1 (en) | 2008-12-04 | 2009-12-04 | Influent liquid treatment system |
US13/132,678 US8727662B2 (en) | 2008-12-04 | 2009-12-04 | Influent liquid treatment system |
US12/953,599 US8142106B2 (en) | 2007-12-06 | 2010-11-24 | Subsurface sewage disposal and wastewater treatment system |
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US99276207P | 2007-12-06 | 2007-12-06 | |
US9242008P | 2008-08-28 | 2008-08-28 | |
US12/328,068 US20090145830A1 (en) | 2007-12-06 | 2008-12-04 | Subsurface sewage disposal and wastewater treatment system |
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US12/953,599 Continuation US8142106B2 (en) | 2007-12-06 | 2010-11-24 | Subsurface sewage disposal and wastewater treatment system |
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US20090145830A1 true US20090145830A1 (en) | 2009-06-11 |
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US12/953,599 Active US8142106B2 (en) | 2007-12-06 | 2010-11-24 | Subsurface sewage disposal and wastewater treatment system |
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US20110290712A1 (en) * | 2008-12-04 | 2011-12-01 | Richard E. Couch | Influent liquid treatment system |
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AU2015264338B2 (en) | 2014-05-19 | 2019-05-16 | Presby Patent Trust | Modular liquid waste treatment system and method |
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US9273456B1 (en) | 2014-09-18 | 2016-03-01 | Winferd R. Miles | Leaching tube |
US9809941B1 (en) * | 2014-10-17 | 2017-11-07 | James M. Donlin | Flared modular drainage system with improved surface area |
CA3014834A1 (en) | 2016-02-17 | 2017-08-24 | Les Entreprises Chartier (2009) Inc. | Bioreactor for wastewater treatment |
GB2586013B (en) * | 2019-07-24 | 2024-02-14 | Illman Susan | Modular rain garden system |
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Cited By (5)
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---|---|---|---|---|
US20110290712A1 (en) * | 2008-12-04 | 2011-12-01 | Richard E. Couch | Influent liquid treatment system |
US8727662B2 (en) * | 2008-12-04 | 2014-05-20 | John M. Laudano | Influent liquid treatment system |
US10519053B2 (en) * | 2017-05-05 | 2019-12-31 | Geomatrix Systems, LLC | Reconfigurable leaching module |
US11059732B2 (en) | 2017-05-05 | 2021-07-13 | Geomatrix Systems, LLC | Reconfigurable leaching module |
US11021380B1 (en) * | 2019-07-19 | 2021-06-01 | Presby Plastics, Inc | Modular wastewater treatment system configured for compact shipping |
Also Published As
Publication number | Publication date |
---|---|
US20110062069A1 (en) | 2011-03-17 |
CA2645835A1 (en) | 2009-06-06 |
US8142106B2 (en) | 2012-03-27 |
CA2645835C (en) | 2012-02-14 |
WO2009073763A1 (en) | 2009-06-11 |
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Owner name: S-BOX LLC, CONNECTICUT Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:COUCH, RICHARD E.;LAUDANO, JOHN M.;REEL/FRAME:021945/0189 Effective date: 20081203 |
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