WO2016111822A1 - Liquid filtration apparatus and method - Google Patents

Liquid filtration apparatus and method Download PDF

Info

Publication number
WO2016111822A1
WO2016111822A1 PCT/US2015/066315 US2015066315W WO2016111822A1 WO 2016111822 A1 WO2016111822 A1 WO 2016111822A1 US 2015066315 W US2015066315 W US 2015066315W WO 2016111822 A1 WO2016111822 A1 WO 2016111822A1
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WO
WIPO (PCT)
Prior art keywords
filtration apparatus
chamber
filters
liquid
stage
Prior art date
Application number
PCT/US2015/066315
Other languages
French (fr)
Inventor
Ryan A. THOMPSON
Original Assignee
Clearwater Technologies, Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Clearwater Technologies, Llc filed Critical Clearwater Technologies, Llc
Publication of WO2016111822A1 publication Critical patent/WO2016111822A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/56Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13Supported filter elements
    • B01D29/23Supported filter elements arranged for outward flow filtration
    • B01D29/27Filter bags
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/52Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection

Definitions

  • the present disclosure generally relates to a filtration apparatus for filtering contaminated liquids, and more particularly, to a redeployable filtration apparatus including stages that is reconfigurable to enable desired removal of suspended solids from liquids and methods for the same.
  • contaminated liquid treatment plans include large permanent installation facilities for processing high volumes of waste water.
  • Such systems provide the benefit of large processing, but also require massive transportation support and/or physical inftastructure to and from the facility.
  • massive transportation support and/or physical inftastructure to and from the facility.
  • a liquid filtration apparatus includes a plurality of stages. Each stage includes a chamber, an inclined wall, and at least one filter positioned at a top of the inclined wall. The liquid filtration apparatus also has a final chamber. Each filter of the liquid filtration apparatus is in fluid communication with the chamber of a subsequent stage or the final chamber. The filtration apparatus may include two stages.
  • the inclined walls may be configured to allow gravity to force at least some of the solid particles in a liquid stream to a bottom of the chamber.
  • the filters may be sock filters.
  • the filtration apparatus may include a plurality of filters at the top of the inclined wall. The filters may be aligned parallel to opposing first side walls of the filtration apparatus and proximate to the opposing first side walls of the filtration apparatus. The filters may be replaceable while the filtration apparatus continues filtration.
  • the filtration apparatus may be configured to handle at least 400 gallons per minute (gpm) of a liquid stream entering the filtration apparatus.
  • the filtration apparatus may include a sediment removal system.
  • the sediment removal system of the filtration apparatus may include a sediment removal outlet. A sediment removal outlet may be in fluid communication with each chamber of each stage and the final chamber.
  • a sediment removal pipe may be in fluid communication with the sediment removal outlets.
  • the filtration apparatus may include mounts configured to assist in moving and securing the filtration apparatus.
  • the filtration apparatus may be reconfigurable to attain desired filtration outcomes.
  • the configurable components of the filtration apparatus may include at least one of a group consisting of: an angle of the inclined wall of each stage relative to a bottom, a length of the inclined wall of each stage, a number of the filters at each stage, an arrangement of the filters at each stage, a size of the filters at each stage, and specifications of the filters at each stage.
  • a liquid level in a chamber of each stage or the final chamber may not reach a height of a bottom of the at least one filter of a preceding stage.
  • a method for filtration includes providing a liquid to a liquid filtration apparatus.
  • the liquid filtration apparatus includes a plurality of stages. Each stage includes a chamber, an inclined wall, and at least one filter positioned at a top of the inclined wall.
  • the liquid filtration apparatus also has a final chamber. Each filter of the liquid filtration apparatus is in fluid communication with the chamber of a subsequent stage or the final chamber.
  • the filtration apparatus may include two stages.
  • the inclined walls may be configured to allow gravity to force at least some solid particles in a liquid stream to a bottom of the chamber.
  • the method may include a plurality of filters at the top of the inclined wall.
  • the filters may be aligned parallel to opposing first side walls of the filtration apparatus and proximate to the opposing first side walls of the filtration apparatus.
  • the filtration apparatus may be configured to handle at least 400 gallons per minute (gpm) of a liquid stream entering the filtration apparatus.
  • the method may include a sediment removal system.
  • the sediment removal system may include sediment removal outlets.
  • a sediment removal outlet may be in fluid communication with each chamber of each stage and the final chamber, a sediment removal pipe may be in fluid communication with the sediment removal outlets.
  • a kit that includes components of a liquid filtration apparatus.
  • the kit includes at least one of: a container, a filter, a mount, a pipe, and a hose.
  • FIG. I is an exploded perspective view of an embodiment of a liquid filtration apparatus
  • FIG.2 is a side view of the liquid filtration apparatus shown in FIG. 1 ;
  • FIG. 3 is a cross-sectional view taken along the lines 3-3 of the liquid filtration apparatus shown in FIG. 1;
  • FIG. 4 is a top view of the liquid filtration apparatus shown in FIG. 1 ;
  • FIG. 5 is a perspective view of an embodiment of a liquid filtration apparatus
  • FIG. 6 is a perspective view of an embodiment of a liquid filtration apparatus as it may be employed
  • FIG. 7 is a perspective view of an embodiment of the liquid filtration apparatus
  • FIG. 8 is a perspective view of the liquid filtration apparatus shown in FIG. 7; and [18] FIG. 9 is a perspective view of the liquid filtration apparatus shown in FIG. 7.
  • a liquid filtration apparatus 10 may be a dual- stage, high flow, gravity filtration system.
  • the liquid filtration apparatus 10 may include a main container 12.
  • the main container 12 may have a bottom 18 and an upper edge 13, defined by opposing first sides 14A, 14B and opposing second sides 16 A, 16B, which are interconnected to define a volume of the main container 12.
  • the bottom 18 of the main container 12 may further be sealed to and in communication with the opposing first and second opposing sides 14A, 14B, 16A, 16B to contain liquids 17, such as a waste stream containing particles or contaminants, within the main container 12 and form vertical boundaries for the volume.
  • the main container 12 may include a plurality of stages.
  • ⁇ stage may include a chamber 12A, 12B, an inclined wall 20, 30, and at least one filter 24, 34, such as a sock filter, positioned at a top of the inclined wall 20, 30.
  • the main container 12 can have any number of chambers 12A, 12B, depending on the desired number of stages of filtration. For instance, in the dual-stage gravity liquid filtration apparatus 10, depicted in FIGS. 1-4, there are two chambers 12A, 12B, but more chambers could be included in the main container 12 if the filtration apparatus 10 were designed to flow a liquid 17 through more than two stages.
  • the main container 12 may also include a final chamber IS.
  • the final chamber IS of the main container 12 may be the chamber into which the liquid 17 flows after it has passed through each stage of the filtration apparatus 10.
  • the first, second and final chambers 12A, 12B and IS as can be seen in FIGS. 1-4, may desirably contain various levels/heights and/or volumes of liquid 17.
  • the container 12 may be made of any number of materials capable of containing liquids 17, such as metals, rigid polymers, durable cloths and/or other suitable fabrics.
  • first and second inclined walls 20, 30, there can be more than one inclined wall 20, 30, such as first and second inclined walls 20, 30, respectively.
  • the first inclined wall 20 and the second inclined wall 30 may be selectively positioned within the volume generally defined by the main container 12, and below the upper edge 13, as shown in FIGS. 1, 2, and S.
  • the first and second inclined walls 20, 30 may be sealed/connected to the bottom 18 and between opposing first sides 14A, 14B, in such a way as to define the first, second and final chambers 12A, 12B, IS.
  • Such separating first and second inclined walls 20, 30 may thus be sealed to and in communication with the bottom 18 and opposing first sides 14A, 14B to prevent mixing of varying levels of particulates/solids that may be present in the liquid 17.
  • the first inclined wall 20 may be positioned at an angle A with reference to the bottom 18 that is not coincident with the opposing second sides' 16 A, 16B angle to the bottom 18.
  • the second inclined wall 30 may be positioned at an angle B with reference to the bottom 18 that is not coincident to opposing second sides' 16 A, 16B angle to the bottom 18 of the container 12.
  • Such inclined walls 20, 30 may thus be positioned at desired angles A, B, to assist the liquid filtration apparatus 10 in accomplishing the desired flow characteristics for filtration and/or clarification of liquids 17 as will be described in greater detail herein below.
  • the first inclined wall 20 may extend further toward the upper edge 13 than the second inclined wall 30.
  • both the first and second inclined walls 20, 30 may be provided with first and second outlet walls 22, 32, respectively, that extend substantially parallel to the bottom 18.
  • these first and second outlet walls 22, 32 may further extend substantially parallel to the opposing second sides 16A, 16B to form first and second retention walls 28, 38, respectively.
  • the first inclined wall 20, first outlet wall 22 and first retention wall 28 may be employed to define a volume of liquid 17 in the first chamber 12A
  • the second inclined wall 30, second outlet wall 32, and the second retention wall 38 may be employed to define another volume of liquid 17 in the second chamber 12B.
  • the first outlet wall 22 may have one or more first apertures 23 positioned therethrough. These first apertures 23, may allow the liquid 17 to fall from the first chamber 12A into the second chamber 12B rather than flowing over the first retention wall 28.
  • the second outlet wall 32 may have one or more second apertures 33 positioned therethrough to allow the liquid 17 to pass between the second chamber 12B and the final chamber IS, rather than flowing over the second retention wall 38.
  • the first and second apertures 23, 33 may be sized and positioned so as to allow for the employment of filtration technologies while employing gravity and natural flows of the liquid 17 to permit travel between the chambers 12 A, 12B and the final chamber IS.
  • first filters 24 may be supported by the first outlet wall 22 and positioned within one or more of the first apertures 23.
  • second filters 34 may be supported by the second outlet wall 32 and positioned within one or more of the second apertures 33.
  • the first and second filters 24, 34 may be arranged in a line perpendicular to the opposing first sides 14A, 14B (parallel to the opposing second sides 16A, 16B).
  • Not every first or second aperture 23, 33 is required to contain a first or second filter 24, 34, and, in some embodiments, a first or second aperture 23, 33 may be left exposed or covered to prevent liquid 17 from flowing therethrough.
  • each of the first filters 24 may have a first filter rim 25 and first filter bottom 27. Liquids 17 may thus enter the first filters 24 through the first filter rim 25 and exit by gravitational forces out of the first filter 24 through the first filter bottom 27.
  • each of the second filters 34 may have a second filter rim 35 and second filter bottom 37 such that liquids 17 may enter the second filters 34 through the second filter rim 35 and exit through the second filter bottom 37 by way of gravity.
  • the first filter rim 25 may be sized with a larger diameter than the diameter of the corresponding first aperture 23 in the first outlet wall 22 that supports the first filters 24, and the second filter rim 35 may have a larger diameter than corresponding second aperture 33 diameter in the second outlet wall 32, which supports the second filters 34.
  • filtration may begin by providing liquid 17 (which may be contaminated with particles) into the filtration apparatus 10.
  • Liquid 17 may be pumped into the first chamber 12A through a pipe 11.
  • the liquid 17 may fill the first chamber 12A volume, wherein heavier/larger particles/solids in the liquid 17 will not be able to climb the first inclined wall 20 over the first outlet wall 22, and may thus precipitate to the bottom 18 inside the first chamber 12A.
  • contaminants/particles may vary widely depending upon the liquid 17 fed into the filtration apparatus 10, but may include mud, silt, sand and other water borne debris.
  • the liquid 17 in the first chamber 12A may flow over the first outlet wall 22 through the first apertures 23, and/or first filters 24 if positioned within the first apertures 23, into the second chamber 12B.
  • the first retention wall 28 is provided to prevent overflow of the liquid 17 from the first chamber 12A into the second chamber 12B without passing through first apertures 23 and/or the first filters 24 in the first outlet wall 22.
  • the liquid 17 that exits the first chamber 12A may have fewer contaminants/particles than it had prior to entering the first chamber 12A and may enter the second chamber 12B.
  • a similar lamella clarification effect may thus occur for the liquid 17 in the second chamber 12B as in the first chamber 12A, now having fewer particles/solids therein, on the second inclined wall 30 as the liquid 17 surmounts the second outlet wall 32 and is stopped by the second retention wall 38.
  • the liquid 17 may flow through the second apertures 33, and/or second filters 34 if positioned within the second apertures 33, into the final chamber 15 and exit the container 12 through an outlet 19 (shown in FIGS. 1 and 5). Accordingly, particles that may be present in the liquid 17 may effectively settle out via the first and second inclined walls 20, 30, as the liquid 17 flows up the inclined walls 20, 30, and thus clarifies the liquid 17 in addition to filtering when the first and/or second filters 24, 34 are installed.
  • FIG. 6 several embodiments of the invention are shown in operation including an inlet pipe 11 and an outlet hose 19A. Further, a grate 50 may be provided to permit additional support and access to the filtration apparatus 10.
  • Rigid mounts 40 may further be provided near the upper edge 13 and/or at the bottom 18 of the container 12, and may be configured to assist in the moving and securing of the filtration apparatus 10. These mounts 40, thus, enhance the mobility of the filtration apparatus 10 so that the filtration apparatus 10 can be transported more easily to different sites requiring filtration.
  • the mounts 40 as shown in FIG. 6, may be welded or affixed to the container 12 in one preferred embodiment, or otherwise attachable to the container 12.
  • mounts 40 may be composed of metal and/or plastic, other suitable materials or combinations thereof may be employed in accordance with the present invention.
  • FIGS. 7-9 depict another embodiment of the liquid filtration apparatus 10 as a dual-stage, high flow, gravity filtration system.
  • the liquid filtration apparatus 10 may include a main container 12.
  • the main container 12 may have a bottom 18, defined by opposing first sides 14A, 14B and opposing second sides 16A, 16B, which are interconnected to define the volume of the main container 12.
  • the bottom 18 of the main container 12 may further be sealed to and in communication with the opposing first and second sides 14A, 14B, 16A, 16B to contain liquids 17 within the main container 12 and form vertical boundaries for the volume.
  • the dual-stage liquid filtration apparatus 10 of FIGS. 7-9 may include a first chamber 12 A, a second chamber 12B, and a final chamber IS.
  • the first filters 24 and the second filters 34 may be arranged in their respective first apertures 23 and second apertures 33 (not shown in FIGS. 7-9) such that the first and second filters 24, 34 may be aligned parallel to the opposing first sides 14A, 14B and proximate to the opposing first sides 14A, 14B (perpendicular to the opposing second sides 16A, 16B).
  • Proximate to the opposing first sides 14 A, 14B means that the first and second filters 24, 34 may be within arm's reach of a user standing adjacent to an opposing first side 14A, 14B and standing at the same level (vertically) as either the first or second filters 24, 34.
  • first and second filters 24, 34 may be proximate to the opposing first sides 14A, 14B, the first and second filters 24, 34 can be changed faster, safer, and more efficiently by a user, allowing for easier maintenance of the filtration apparatus 10. This arrangement may also allow for increased flow through the system with multiple apertures 23, 33 on both of the opposing first sides 14A, 14B.
  • the filtration apparatus 10 may include a sediment removal system 60 (see FIGS. 7-9).
  • the sediment removal system 60 may include sediment removal outlets 62 and a sediment removal pipe 64.
  • Each chamber i.e., the first and second chamber 12 ⁇ , 12B, and the final chamber IS
  • the sediment removal outlets 62 may extend through one of the first opposing sides 14 ⁇ , 14B to place the chambers 12A, 12B, and IS, in fluid communication with the sediment removal pipe 64.
  • the sediment removal pipe 64 may interconnect the sediment removal outlets 62.
  • the sediment removal system 60 may more easily allow sludge and other particulate that is precipitated to the bottom 18 during filtration to be removed from the system. Therefore, the sediment removal system 60 may allow the system to be more easily maintained.
  • the filtration apparatus 10 may provide a system that is lightweight, accessible, redeployable and stable. Further, the filtration apparatus 10 may be reconfigurable to allow easy adjustments by the user to accommodate desired treatment plans. Different components of the nitration apparatus 10 maybe altered to reconfigure the filtration apparatus 10 and, ultimately, adjust how the liquid 17 is filtered through the system, to conform to the desired liquid treatment plan.
  • the first and/or second inclined wall 20, 30 may be altered to change the filtration characteristics.
  • the first or second inclined wall 20, 30 may be altered by changing the angle A, B of the first or second inclined wall 20, 30 relative to the bottom 18, to alter the magnitude the gravitational force exerts on the particles/contaminants in the liquid 17.
  • the length of the first and/or second inclined wall 20, 30 may also be altered to adjust the distance up which the particles/contaminants in the liquid 17 must travel to reach the first or second filter 24, 34.
  • the component of the filtration apparatus 10 that may be altered to reconfigure the filtration apparatus 10 are the first and/or second filter 24, 34.
  • the number of first and/or second filters 24, 34 installed at each stage may be selected and changed to meet the desired liquid treatment plan.
  • some or all first and/or second filters 24, 34 may be removed from their respective first and/or second apertures 23, 33 so that the first and/or second apertures 23, 33 are exposed.
  • the first and/or second filters 24, 34 may be removed and the corresponding first or second aperture 23, 33 covered so that no liquid 17 can pass through the first or second aperture 23, 33.
  • first and second filters 24, 34 can be replaced or removed and the first or second apertures 23, 33 covered or uncovered during filtration, without stopping filtration. These adjustments can also be made to the first and second filters 24, 34 or first or second apertures 23, 33 before or after filtration.
  • the first and second filters 24, 34 may be designed to provide various levels of filtration and/or support to certain types of media caught in the first and second filters 24, 34. These first and second filters 24, 34 may thus be semi-rigid plastics, fabrics, meshes or other desirable materials to accomplish the desired treatment plan.
  • the first and second filters 24, 34 may be an extended concave shape that terminates at the filter bottom 27, 37 above a level of liquid 17 in a subsequent chamber. In other words, first filters 24 may be formed such that the first filter bottom 27 is above a maximum liquid 17 level of the second chamber 12B.
  • second filters 34 may be configured such that the second filter bottom 37 does not reach the maximum level of liquid 17 of the final chamber IS as may be regulated by the flow and sizing of the outlet 19 in combination with any capacity of hose 19A to allow flow out of the filtration apparatus 10.
  • the arrangement of the first and/or second filters 24, 34 is also alterable to reconfigure the filtration apparatus 10, in order to effectuate a different liquid treatment plan.
  • the first and second filters 24, 34 can be arranged in a line perpendicular to the opposing first sides 14A, 14B.
  • the first and second filters 24, 34 can be arranged parallel to the opposing first sides 14A, 14B and proximate to the first opposing sides 14A, 14B.
  • Other arrangements of the first and second filters 24, 34 may be used in other embodiments to achieve the desired liquid treatment plan. It may also be advantageous, in some embodiments, for the arrangement of the first filters 24 to be different from the arrangement of the second filters 34.
  • the size of the first and second filters 24, 34 may also be reconfigurable. By altering the size of each filter, 24, 34, it is meant that the surface area of filter material through which liquid 17 can flow is changed.
  • the specifications of the first and second filter 24, 34 may also be reconfigurable to attain the desired liquid treatment plan. Specifications of filters can include the type of filter used, the average size of the pores of the filter media, and other relevant filter characteristics. For instance, in one embodiment, sock filters may be used, but the first and second filters 24, 34 are not limited to sock filters. Additionally, in some embodiments, SO micron filters may be used. In other embodiments, 10 micron filters may be used.
  • filters having a different average pore size may be used based at least in part on the desired liquid filtration plan. All configurable filter specifications may be selected in line with the liquid filtration plan. It is noted that the filter characteristics of the first filter 24 may differ from those of the second filter 34.
  • the filtration apparatus can be reconfigured to handle different amounts of liquid entering the system.
  • the filtration apparatus 10 is configured to handle at least 400 gallons per minute (gpm).
  • the filtration apparatus 10 may be configured to handle at least 450 gpm of liquid.
  • the filtration apparatus 10 may be configured to handle upwards of 100 gpm or upwards of 240 gpm of liquid 17.
  • kits may include as its components one or more of the following: the container 12, the first or second filters 24, 34, one or more mounts 40, pipe 11 and hose 19 ⁇ .

Abstract

A liquid filtration apparatus including a plurality of stages. Each stage includes a chamber, an inclined wall, and at least one filter positioned at a top of the inclined wall. The liquid filtration apparatus also includes a final chamber. Each filter of the liquid filtration apparatus is in fluid communication with the chamber of a subsequent stage or the final chamber. A method of filtration including providing liquid to a liquid filtration apparatus. A kit including components of a liquid filtration apparatus.

Description

LIQUID FILTRATION APPARATUS AND METHOD
CROSS-REFERENCE TO RELATED APPLICATIONS
[1] This application claims priority to United States Provisional Patent Application No. 62/099,759, filed January S, 2015, the disclosure of which is hereby incorporated in its entirety by reference.
BACKGROUND OF THE INVENTION
Field of the Invention
[2] The present disclosure generally relates to a filtration apparatus for filtering contaminated liquids, and more particularly, to a redeployable filtration apparatus including stages that is reconfigurable to enable desired removal of suspended solids from liquids and methods for the same.
Description of Related Art
[3] In some instances, contaminated liquid treatment plans include large permanent installation facilities for processing high volumes of waste water. Such systems provide the benefit of large processing, but also require massive transportation support and/or physical inftastructure to and from the facility. However, due to the large costs and dynamic nature of where water filtration may be required, often these permanent installation facilities and high transportation costs cannot be easily justified.
[4] Alternatively, certain low volume mobile units may be employed to accomplish a simpler, low volume treatment plan. These mobile liquid waste water filtration systems are limited in their versatility of filtration capability and certainly limited in the processing volumes they can handle. Accordingly, when a large volume of waste water is required to be filtered, making dozens of such units available and dispersing the filtration needs amongst many units can be logistically challenging and cost prohibitive.
SUMMARY OF THE INVENTION
[5] A high volume, mobile contaminated liquid filtration which, whatever the primary method of treatment, may be deployed, utilized and managed on-site as part of a customizable treatment plan benefitting from mobility and reconfigurable flexibility of the liquid filtration apparatus. [6\ According to one preferred, non-limiting embodiment of the invention, a liquid filtration apparatus includes a plurality of stages. Each stage includes a chamber, an inclined wall, and at least one filter positioned at a top of the inclined wall. The liquid filtration apparatus also has a final chamber. Each filter of the liquid filtration apparatus is in fluid communication with the chamber of a subsequent stage or the final chamber. The filtration apparatus may include two stages. The inclined walls may be configured to allow gravity to force at least some of the solid particles in a liquid stream to a bottom of the chamber. The filters may be sock filters. The filtration apparatus may include a plurality of filters at the top of the inclined wall. The filters may be aligned parallel to opposing first side walls of the filtration apparatus and proximate to the opposing first side walls of the filtration apparatus. The filters may be replaceable while the filtration apparatus continues filtration. The filtration apparatus may be configured to handle at least 400 gallons per minute (gpm) of a liquid stream entering the filtration apparatus. The filtration apparatus may include a sediment removal system. The sediment removal system of the filtration apparatus may include a sediment removal outlet. A sediment removal outlet may be in fluid communication with each chamber of each stage and the final chamber. A sediment removal pipe may be in fluid communication with the sediment removal outlets. The filtration apparatus may include mounts configured to assist in moving and securing the filtration apparatus. The filtration apparatus may be reconfigurable to attain desired filtration outcomes. The configurable components of the filtration apparatus may include at least one of a group consisting of: an angle of the inclined wall of each stage relative to a bottom, a length of the inclined wall of each stage, a number of the filters at each stage, an arrangement of the filters at each stage, a size of the filters at each stage, and specifications of the filters at each stage. A liquid level in a chamber of each stage or the final chamber may not reach a height of a bottom of the at least one filter of a preceding stage.
[7] According to another preferred, non-limiting embodiment of the invention, a method for filtration includes providing a liquid to a liquid filtration apparatus. The liquid filtration apparatus includes a plurality of stages. Each stage includes a chamber, an inclined wall, and at least one filter positioned at a top of the inclined wall. The liquid filtration apparatus also has a final chamber. Each filter of the liquid filtration apparatus is in fluid communication with the chamber of a subsequent stage or the final chamber. The filtration apparatus may include two stages. The inclined walls may be configured to allow gravity to force at least some solid particles in a liquid stream to a bottom of the chamber. The method may include a plurality of filters at the top of the inclined wall. The filters may be aligned parallel to opposing first side walls of the filtration apparatus and proximate to the opposing first side walls of the filtration apparatus. The filtration apparatus may be configured to handle at least 400 gallons per minute (gpm) of a liquid stream entering the filtration apparatus. The method may include a sediment removal system. The sediment removal system may include sediment removal outlets. A sediment removal outlet may be in fluid communication with each chamber of each stage and the final chamber, a sediment removal pipe may be in fluid communication with the sediment removal outlets.
[8] According to another preferred, non-limiting embodiment of the invention, a kit that includes components of a liquid filtration apparatus. The kit includes at least one of: a container, a filter, a mount, a pipe, and a hose.
[9] These and other features and characteristics of the present invention, as well as the methods of operation and functions of the related elements of structures and combinations of parts and economies of manufacture, will become more apparent upon consideration of the following description and the appended claims with reference to the accompanying drawings, all of which form a part of this specification, wherein like reference numerals designate corresponding parts in the various figures. It is to be expressly understood, however, that the drawings are for the purpose of illustration and description only and are not intended to unduly limit the present invention. As used in the specification and the claims, the singular form of "a", "an", and "the" include plural referents unless the context clearly dictates otherwise.
BRIEF DESCRIPTION OF THE DRAWINGS
[10] FIG. I is an exploded perspective view of an embodiment of a liquid filtration apparatus;
[11] FIG.2 is a side view of the liquid filtration apparatus shown in FIG. 1 ;
[12] FIG. 3 is a cross-sectional view taken along the lines 3-3 of the liquid filtration apparatus shown in FIG. 1;
[13] FIG. 4 is a top view of the liquid filtration apparatus shown in FIG. 1 ;
[14] FIG. 5 is a perspective view of an embodiment of a liquid filtration apparatus;
[15] FIG. 6 is a perspective view of an embodiment of a liquid filtration apparatus as it may be employed;
[16] FIG. 7 is a perspective view of an embodiment of the liquid filtration apparatus;
[17] FIG. 8 is a perspective view of the liquid filtration apparatus shown in FIG. 7; and [18] FIG. 9 is a perspective view of the liquid filtration apparatus shown in FIG. 7.
DETAILED DESCRIPTION OF THE INVENTION
[19] It will be apparent to those skilled in the art that many uses and design variations are possible for the liquid filtration apparatus disclosed herein. The following detailed discussion of various alternative and preferred embodiments will illustrate general principles of the invention, but other embodiments and variations will be apparent to those skilled in the art given the benefit of this disclosure.
[20] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "vertical", "horizontal", "top", "bottom", "lateral", "longitudinal" and related derivatives thereof shall relate to the invention as it is oriented in the drawings. However, it is to be understood that the present invention may assume various alternative variations, except where expressly specified to the contrary. It is also to be understood that the specific apparatus and configurations illustrated in the attached drawings, and described in the following specification, are simply exemplary embodiments of the invention. Hence, specific dimensions and other physical characteristics related to the embodiments disclosed herein are not to be considered as unduly limiting.
[21] It is noted here that various figures shown and discussed herein are for illustrative purpose only, and are not necessarily drawn to scale. The figures facilitate discussion of liquid filtration apparatus configurations according to one or more embodiments of the present disclosure without necessarily limiting the liquid filtration apparatus configuration to the dimensions, designs, or illustrations depicted therein.
[22] Referring to FIGS. 1-4, in one embodiment, a liquid filtration apparatus 10 may be a dual- stage, high flow, gravity filtration system. In this embodiment, the liquid filtration apparatus 10 may include a main container 12. The main container 12 may have a bottom 18 and an upper edge 13, defined by opposing first sides 14A, 14B and opposing second sides 16 A, 16B, which are interconnected to define a volume of the main container 12. In addition, the bottom 18 of the main container 12 may further be sealed to and in communication with the opposing first and second opposing sides 14A, 14B, 16A, 16B to contain liquids 17, such as a waste stream containing particles or contaminants, within the main container 12 and form vertical boundaries for the volume. [23] The main container 12 may include a plurality of stages. Λ stage may include a chamber 12A, 12B, an inclined wall 20, 30, and at least one filter 24, 34, such as a sock filter, positioned at a top of the inclined wall 20, 30. The main container 12 can have any number of chambers 12A, 12B, depending on the desired number of stages of filtration. For instance, in the dual-stage gravity liquid filtration apparatus 10, depicted in FIGS. 1-4, there are two chambers 12A, 12B, but more chambers could be included in the main container 12 if the filtration apparatus 10 were designed to flow a liquid 17 through more than two stages. The main container 12 may also include a final chamber IS. The final chamber IS of the main container 12 may be the chamber into which the liquid 17 flows after it has passed through each stage of the filtration apparatus 10. The first, second and final chambers 12A, 12B and IS, as can be seen in FIGS. 1-4, may desirably contain various levels/heights and/or volumes of liquid 17.
[24] The container 12 may be made of any number of materials capable of containing liquids 17, such as metals, rigid polymers, durable cloths and/or other suitable fabrics.
[25] As shown in FIG. 1, there can be more than one inclined wall 20, 30, such as first and second inclined walls 20, 30, respectively. The first inclined wall 20 and the second inclined wall 30 may be selectively positioned within the volume generally defined by the main container 12, and below the upper edge 13, as shown in FIGS. 1, 2, and S. The first and second inclined walls 20, 30 may be sealed/connected to the bottom 18 and between opposing first sides 14A, 14B, in such a way as to define the first, second and final chambers 12A, 12B, IS. Such separating first and second inclined walls 20, 30 may thus be sealed to and in communication with the bottom 18 and opposing first sides 14A, 14B to prevent mixing of varying levels of particulates/solids that may be present in the liquid 17.
[26] Referring to FIG. 2, the first inclined wall 20 may be positioned at an angle A with reference to the bottom 18 that is not coincident with the opposing second sides' 16 A, 16B angle to the bottom 18. In a similar fashion, the second inclined wall 30 may be positioned at an angle B with reference to the bottom 18 that is not coincident to opposing second sides' 16 A, 16B angle to the bottom 18 of the container 12. Such inclined walls 20, 30 may thus be positioned at desired angles A, B, to assist the liquid filtration apparatus 10 in accomplishing the desired flow characteristics for filtration and/or clarification of liquids 17 as will be described in greater detail herein below. [27] As can be seen in FIGS. 1-3, the first inclined wall 20 may extend further toward the upper edge 13 than the second inclined wall 30. In addition, both the first and second inclined walls 20, 30 may be provided with first and second outlet walls 22, 32, respectively, that extend substantially parallel to the bottom 18. In addition, these first and second outlet walls 22, 32, may further extend substantially parallel to the opposing second sides 16A, 16B to form first and second retention walls 28, 38, respectively. Accordingly, the first inclined wall 20, first outlet wall 22 and first retention wall 28 may be employed to define a volume of liquid 17 in the first chamber 12A, while the second inclined wall 30, second outlet wall 32, and the second retention wall 38 may be employed to define another volume of liquid 17 in the second chamber 12B.
[28] Referring to FIGS. 1-5, the first outlet wall 22 may have one or more first apertures 23 positioned therethrough. These first apertures 23, may allow the liquid 17 to fall from the first chamber 12A into the second chamber 12B rather than flowing over the first retention wall 28. In a similar fashion, the second outlet wall 32 may have one or more second apertures 33 positioned therethrough to allow the liquid 17 to pass between the second chamber 12B and the final chamber IS, rather than flowing over the second retention wall 38. In addition, the first and second apertures 23, 33, may be sized and positioned so as to allow for the employment of filtration technologies while employing gravity and natural flows of the liquid 17 to permit travel between the chambers 12 A, 12B and the final chamber IS.
[29] In accordance with embodiments of the invention, first filters 24 may be supported by the first outlet wall 22 and positioned within one or more of the first apertures 23. Likewise, second filters 34 may be supported by the second outlet wall 32 and positioned within one or more of the second apertures 33. In some embodiments, like those shown in FIGS. 1-6, the first and second filters 24, 34 may be arranged in a line perpendicular to the opposing first sides 14A, 14B (parallel to the opposing second sides 16A, 16B). Not every first or second aperture 23, 33 is required to contain a first or second filter 24, 34, and, in some embodiments, a first or second aperture 23, 33 may be left exposed or covered to prevent liquid 17 from flowing therethrough.
[30] Referring to FIGS. 1-3, each of the first filters 24 may have a first filter rim 25 and first filter bottom 27. Liquids 17 may thus enter the first filters 24 through the first filter rim 25 and exit by gravitational forces out of the first filter 24 through the first filter bottom 27. Likewise, each of the second filters 34 may have a second filter rim 35 and second filter bottom 37 such that liquids 17 may enter the second filters 34 through the second filter rim 35 and exit through the second filter bottom 37 by way of gravity. Accordingly, the first filter rim 25 may be sized with a larger diameter than the diameter of the corresponding first aperture 23 in the first outlet wall 22 that supports the first filters 24, and the second filter rim 35 may have a larger diameter than corresponding second aperture 33 diameter in the second outlet wall 32, which supports the second filters 34.
[31] According to one embodiment, shown in FIGS 1-6, filtration may begin by providing liquid 17 (which may be contaminated with particles) into the filtration apparatus 10. Liquid 17 may be pumped into the first chamber 12A through a pipe 11. The liquid 17 may fill the first chamber 12A volume, wherein heavier/larger particles/solids in the liquid 17 will not be able to climb the first inclined wall 20 over the first outlet wall 22, and may thus precipitate to the bottom 18 inside the first chamber 12A. These contaminants/particles may vary widely depending upon the liquid 17 fed into the filtration apparatus 10, but may include mud, silt, sand and other water borne debris. The liquid 17 in the first chamber 12A may flow over the first outlet wall 22 through the first apertures 23, and/or first filters 24 if positioned within the first apertures 23, into the second chamber 12B. As mentioned above, the first retention wall 28 is provided to prevent overflow of the liquid 17 from the first chamber 12A into the second chamber 12B without passing through first apertures 23 and/or the first filters 24 in the first outlet wall 22.
[32] In a similar fashion to the above, the liquid 17 that exits the first chamber 12A may have fewer contaminants/particles than it had prior to entering the first chamber 12A and may enter the second chamber 12B. A similar lamella clarification effect may thus occur for the liquid 17 in the second chamber 12B as in the first chamber 12A, now having fewer particles/solids therein, on the second inclined wall 30 as the liquid 17 surmounts the second outlet wall 32 and is stopped by the second retention wall 38. The liquid 17 may flow through the second apertures 33, and/or second filters 34 if positioned within the second apertures 33, into the final chamber 15 and exit the container 12 through an outlet 19 (shown in FIGS. 1 and 5). Accordingly, particles that may be present in the liquid 17 may effectively settle out via the first and second inclined walls 20, 30, as the liquid 17 flows up the inclined walls 20, 30, and thus clarifies the liquid 17 in addition to filtering when the first and/or second filters 24, 34 are installed.
[33] As can be seen in FIG. 6, several embodiments of the invention are shown in operation including an inlet pipe 11 and an outlet hose 19A. Further, a grate 50 may be provided to permit additional support and access to the filtration apparatus 10. Rigid mounts 40 may further be provided near the upper edge 13 and/or at the bottom 18 of the container 12, and may be configured to assist in the moving and securing of the filtration apparatus 10. These mounts 40, thus, enhance the mobility of the filtration apparatus 10 so that the filtration apparatus 10 can be transported more easily to different sites requiring filtration. The mounts 40, as shown in FIG. 6, may be welded or affixed to the container 12 in one preferred embodiment, or otherwise attachable to the container 12. Although mounts 40 may be composed of metal and/or plastic, other suitable materials or combinations thereof may be employed in accordance with the present invention.
[34] FIGS. 7-9 depict another embodiment of the liquid filtration apparatus 10 as a dual-stage, high flow, gravity filtration system. In this embodiment, the liquid filtration apparatus 10 may include a main container 12. The main container 12 may have a bottom 18, defined by opposing first sides 14A, 14B and opposing second sides 16A, 16B, which are interconnected to define the volume of the main container 12. In addition, the bottom 18 of the main container 12 may further be sealed to and in communication with the opposing first and second sides 14A, 14B, 16A, 16B to contain liquids 17 within the main container 12 and form vertical boundaries for the volume. The dual-stage liquid filtration apparatus 10 of FIGS. 7-9 may include a first chamber 12 A, a second chamber 12B, and a final chamber IS.
[35] As shown in FIGS. 7-9, the first filters 24 and the second filters 34 may be arranged in their respective first apertures 23 and second apertures 33 (not shown in FIGS. 7-9) such that the first and second filters 24, 34 may be aligned parallel to the opposing first sides 14A, 14B and proximate to the opposing first sides 14A, 14B (perpendicular to the opposing second sides 16A, 16B). Proximate to the opposing first sides 14 A, 14B means that the first and second filters 24, 34 may be within arm's reach of a user standing adjacent to an opposing first side 14A, 14B and standing at the same level (vertically) as either the first or second filters 24, 34. Since the first and second filters 24, 34 may be proximate to the opposing first sides 14A, 14B, the first and second filters 24, 34 can be changed faster, safer, and more efficiently by a user, allowing for easier maintenance of the filtration apparatus 10. This arrangement may also allow for increased flow through the system with multiple apertures 23, 33 on both of the opposing first sides 14A, 14B.
[36] According to certain embodiments, the filtration apparatus 10 may include a sediment removal system 60 (see FIGS. 7-9). The sediment removal system 60 may include sediment removal outlets 62 and a sediment removal pipe 64. Each chamber (i.e., the first and second chamber 12Λ, 12B, and the final chamber IS) may include an individually valved sediment removal outlet 62. The sediment removal outlets 62 may extend through one of the first opposing sides 14Λ, 14B to place the chambers 12A, 12B, and IS, in fluid communication with the sediment removal pipe 64. The sediment removal pipe 64 may interconnect the sediment removal outlets 62. As a result, the sediment removal system 60 may more easily allow sludge and other particulate that is precipitated to the bottom 18 during filtration to be removed from the system. Therefore, the sediment removal system 60 may allow the system to be more easily maintained.
[37] The filtration apparatus 10, according to one embodiment, may provide a system that is lightweight, accessible, redeployable and stable. Further, the filtration apparatus 10 may be reconfigurable to allow easy adjustments by the user to accommodate desired treatment plans. Different components of the nitration apparatus 10 maybe altered to reconfigure the filtration apparatus 10 and, ultimately, adjust how the liquid 17 is filtered through the system, to conform to the desired liquid treatment plan. In one embodiment, the first and/or second inclined wall 20, 30 may be altered to change the filtration characteristics. The first or second inclined wall 20, 30 may be altered by changing the angle A, B of the first or second inclined wall 20, 30 relative to the bottom 18, to alter the magnitude the gravitational force exerts on the particles/contaminants in the liquid 17. The length of the first and/or second inclined wall 20, 30 may also be altered to adjust the distance up which the particles/contaminants in the liquid 17 must travel to reach the first or second filter 24, 34.
[38] In another embodiment, the component of the filtration apparatus 10 that may be altered to reconfigure the filtration apparatus 10 are the first and/or second filter 24, 34. For instance, the number of first and/or second filters 24, 34 installed at each stage may be selected and changed to meet the desired liquid treatment plan. In certain embodiments, some or all first and/or second filters 24, 34 may be removed from their respective first and/or second apertures 23, 33 so that the first and/or second apertures 23, 33 are exposed. In other embodiments, the first and/or second filters 24, 34 may be removed and the corresponding first or second aperture 23, 33 covered so that no liquid 17 can pass through the first or second aperture 23, 33. It will be appreciated that these first and second filters 24, 34 can be replaced or removed and the first or second apertures 23, 33 covered or uncovered during filtration, without stopping filtration. These adjustments can also be made to the first and second filters 24, 34 or first or second apertures 23, 33 before or after filtration.
[39] The first and second filters 24, 34 may be designed to provide various levels of filtration and/or support to certain types of media caught in the first and second filters 24, 34. These first and second filters 24, 34 may thus be semi-rigid plastics, fabrics, meshes or other desirable materials to accomplish the desired treatment plan. In one embodiment, the first and second filters 24, 34 may be an extended concave shape that terminates at the filter bottom 27, 37 above a level of liquid 17 in a subsequent chamber. In other words, first filters 24 may be formed such that the first filter bottom 27 is above a maximum liquid 17 level of the second chamber 12B. Likewise, second filters 34 may be configured such that the second filter bottom 37 does not reach the maximum level of liquid 17 of the final chamber IS as may be regulated by the flow and sizing of the outlet 19 in combination with any capacity of hose 19A to allow flow out of the filtration apparatus 10.
[40] The arrangement of the first and/or second filters 24, 34 is also alterable to reconfigure the filtration apparatus 10, in order to effectuate a different liquid treatment plan. In one embodiment (shown, for instance, in FIGS. 1-6) the first and second filters 24, 34 can be arranged in a line perpendicular to the opposing first sides 14A, 14B. In another embodiment (shown, for instance, in FIGS. 7-9) the first and second filters 24, 34 can be arranged parallel to the opposing first sides 14A, 14B and proximate to the first opposing sides 14A, 14B. Other arrangements of the first and second filters 24, 34 may be used in other embodiments to achieve the desired liquid treatment plan. It may also be advantageous, in some embodiments, for the arrangement of the first filters 24 to be different from the arrangement of the second filters 34.
[41] The size of the first and second filters 24, 34 may also be reconfigurable. By altering the size of each filter, 24, 34, it is meant that the surface area of filter material through which liquid 17 can flow is changed. The specifications of the first and second filter 24, 34 may also be reconfigurable to attain the desired liquid treatment plan. Specifications of filters can include the type of filter used, the average size of the pores of the filter media, and other relevant filter characteristics. For instance, in one embodiment, sock filters may be used, but the first and second filters 24, 34 are not limited to sock filters. Additionally, in some embodiments, SO micron filters may be used. In other embodiments, 10 micron filters may be used. Still in other embodiments, filters having a different average pore size may be used based at least in part on the desired liquid filtration plan. All configurable filter specifications may be selected in line with the liquid filtration plan. It is noted that the filter characteristics of the first filter 24 may differ from those of the second filter 34.
[42] The filtration apparatus can be reconfigured to handle different amounts of liquid entering the system. In one embodiment, the filtration apparatus 10 is configured to handle at least 400 gallons per minute (gpm). In other embodiments, the filtration apparatus 10 may be configured to handle at least 450 gpm of liquid. In other embodiments, the filtration apparatus 10 may be configured to handle upwards of 100 gpm or upwards of 240 gpm of liquid 17.
[43] In one embodiment, various components of the filtration apparatus 10 may be provided as part of a kit. For example, such a kit may include as its components one or more of the following: the container 12, the first or second filters 24, 34, one or more mounts 40, pipe 11 and hose 19Λ.
[44] From the foregoing disclosure and detailed description of the invention, it is also apparent that various modifications, additions, and other alternative embodiments are possible without departing from the true scope and spirit of the present invention. The embodiments discussed were chosen and described to provide the best illustration of the principles of the present invention and its practical applications to thereby enable one of ordinary skill in the art to utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated. All such modifications and variations are within the scope of the present invention as determined by the appended claims when interpreted in accordance with the benefit to which they are fairly, legally, and equitably entitled.

Claims

THE INVENTION CLAIMED IS
1. A liquid filtration apparatus comprising:
a plurality of stages, each stage comprising:
a chamber,
an inclined wall, and
at least one filter positioned at a top of the inclined wall; and
a final chamber,
wherein each filter is in fluid communication with the chamber of a subsequent stage or the final chamber.
2. The filtration apparatus of claim 1, wherein the filtration apparatus comprises two stages.
3. The filtration apparatus of claim 1 , wherein the inclined walls are configured to allow gravity to force at least some solid particles in a liquid stream to a bottom of the chamber.
4. The filtration apparatus of claim 1, wherein the filters are sock filters.
5. The filtration apparatus of claim 1 comprising a plurality of filters at the top of the inclined wall, wherein the filters are aligned parallel to opposing first side walls of the filtration apparatus and proximate to the opposing first side walls of the filtration apparatus.
6. The filtration apparatus of claim 1 , wherein the filters are replaceable while the filtration apparatus continues filtration.
7. The filtration apparatus of claim 1, wherein the filtration apparatus is configured to handle at least 400 gallons per minute (gpm) of a liquid stream entering the filtration apparatus.
8. The filtration apparatus of claim 1, further comprising a sediment removal system.
9. The filtration apparatus of claim 8, wherein the sediment removal system comprises:
sediment removal outlets, wherein a sediment removal outlet is in fluid communication with each chamber of each stage and the final chamber, and
a sediment removal pipe in fluid communication with the sediment removal outlets.
10. The filtration apparatus of claim 1 , further comprising mounts, wherein the mounts are configured to assist in moving and securing the filtration apparatus.
11. The filtration apparatus of claim 1, wherein the filtration apparatus is configurable to attain desired filtration outcomes.
12. The filtration apparatus of claim 11 , wherein configurable components of the filtration apparatus include at least one of a group consisting of: an angle of the inclined wall of each stage relative to a bottom, a length of the inclined wall of each stage, a number of the filters at each stage, an arrangement of the filters at each stage, a size of the filters at each stage, and specifications of the filters at each stage.
13. The filtration apparatus of claim 1, wherein a liquid level in a chamber of each stage or the final chamber does not reach a height of a bottom of the at least one filter of a preceding stage.
14. Λ method of filtration comprising:
providing liquid to a liquid filtration apparatus comprising:
a plurality of stages, each stage comprising:
a chamber;
an inclined wall; and
at least one filter positioned at a top of the inclined wall, and a final chamber,
wherein each filter is in fluid communication with the chamber of a subsequent stage or the final chamber.
15. The method of claim 14, wherein the filtration apparatus comprises two stages.
16. The method of claim 14, wherein the inclined walls are configured to allow gravity to force at least some solid particles in a liquid stream to a bottom of the chamber.
17. The method of claim 14 comprising a plurality of filters at the top of the inclined wall, wherein the filters are aligned parallel to opposing first side walls of the filtration apparatus and proximate to the opposing first side walls of the filtration apparatus.
18. The method of claim 14, wherein the filtration apparatus is configured to handle at least 400 gallons per minute (gpm) of a liquid stream entering the filtration apparatus.
19. The method of claim 14, further comprising a sediment removal system comprising:
sediment removal outlets, wherein a sediment removal outlet is in fluid communication with each chamber of each stage and the final chamber, and
a sediment removal pipe in fluid communication with the sediment removal outlets.
20. A kit comprising components of the liquid filtration apparatus of claim 1, wherein the kit includes at least one of a group consisting of: a container, a filter, a mount, a pipe, and a hose.
PCT/US2015/066315 2015-01-05 2015-12-17 Liquid filtration apparatus and method WO2016111822A1 (en)

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