WO2016004456A1 - Appareil destiné à filtrer de l'eau polluée - Google Patents

Appareil destiné à filtrer de l'eau polluée Download PDF

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Publication number
WO2016004456A1
WO2016004456A1 PCT/AU2015/000391 AU2015000391W WO2016004456A1 WO 2016004456 A1 WO2016004456 A1 WO 2016004456A1 AU 2015000391 W AU2015000391 W AU 2015000391W WO 2016004456 A1 WO2016004456 A1 WO 2016004456A1
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WIPO (PCT)
Prior art keywords
polluted water
bypass
filter element
housing
filtering
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/AU2015/000391
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English (en)
Inventor
Leo Crasti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aquavest Pty Ltd
Original Assignee
Aquavest Pty Ltd
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
Priority claimed from AU2014902689A external-priority patent/AU2014902689A0/en
Application filed by Aquavest Pty Ltd filed Critical Aquavest Pty Ltd
Publication of WO2016004456A1 publication Critical patent/WO2016004456A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/0401—Gullies for use in roads or pavements
    • E03F5/0404—Gullies for use in roads or pavements with a permanent or temporary filtering device; Filtering devices specially adapted therefor

Definitions

  • the present invention relates to an apparatus for
  • polyluted water is used for any water from industrial and non-industrial sources. Examples include drainage water, storm or rain water, water from dams, weirs, reservoirs, detention units, channelled water ways, trenches and the like.
  • waste water such as waste water from industrial sources including contaminated water from industrial sites, such as mining sites, contaminated water that was used for watering coal piles and any other waste water .
  • the present invention provides improvement.
  • the present invention provides an apparatus for filtering polluted water, the apparatus comprising:
  • a housing having an inlet for receiving the polluted water
  • a filter element for filtering the polluted water, the filter element being positioned such that in use polluted water is filtered by the filter element before exiting the housing;
  • the apparatus is arranged such that, when a level of the polluted water increases within the housing, the bypass is at least partially surrounded by the polluted water and, beyond a predetermined level of polluted water, polluted water flows into an opening of the bypass from directions around at least a portion of the opening of the bypass.
  • the level of the polluted water within the housing may increase when the at least one filter element is at least partially blocked resulting in insufficient throughput through the at least one filter element.
  • the level of the polluted water within the housing may increase when an inflow of polluted water received at the inlet portion is higher than the throughput of filtered water through the at least one filter element.
  • filter element is used for any type of material or arrangement that filters.
  • the filter element may be provided in the form of a coarse mesh for filtering gross pollutants, but may alternatively also be provided in the form of a finer mesh or suitable foam or the like.
  • the filter element may comprise a combination of any type of finer filter elements with any type of coarse filter elements.
  • the bypass opening may in use be substantially
  • the present invention provides an apparatus for filtering polluted water, the apparatus comprising:
  • a housing having an inlet portion comprising an inlet grate for receiving the polluted water; a filter element for filtering the polluted water;
  • inlet grate is arranged such that
  • bypass and the inlet grate are positioned relative to each other such that, when a level of the polluted water increases beyond a predetermined level, polluted water flows into the bypass, but at least a portion of the buoyant material is trapped in the housing.
  • the apparatus in accordance with the second aspect of the present invention may be arranged such that, when a level of the polluted water increases within the housing, the bypass is at least partially surrounded by the polluted water and, beyond a predetermined level of polluted water, polluted water flows into the bypass.
  • the predetermined level coincides with a level of a bypass inlet and is located below a bottom level of the inlet grate.
  • the predetermined level and the level of the bypass inlet may be between a bottom portion of the inlet grate and a top portion of the inlet grate.
  • the bypass inlet may be positioned at a distance of 0.5 to 5cm or 0.5 to 2cm below a portion of the inlet grate that is positioned directly above the level of the bypass inlet.
  • the inlet grate may have a substantially uniform height.
  • the inlet grate have a recessed portion that is recessed from a bottom portion of the grate and is arranged such that an end-portion of the bypass can be received within the recessed portion, in which case the bottom portion of the grate that is outside the recessed portion may be at a lower level than the bypass inlet.
  • the inlet grate comprises a plurality of grate elements, such as straight or curved rods or blades that extend across at least a portion of the inlet grate.
  • the grate elements may be positioned relative to each other such that in use a downward force resulting from inflowing polluted water is larger than an is larger than an upward (Venturi) force resulting from polluted water that in use may flow over spaces between adjacent grate elements, which has the advantage that trapping of buoyant material in the housing is facilitated.
  • At least some of the grate elements may be spaced at a distance of 0.5 to 2.5 cm from each other, such as 1 cm.
  • the grate elements are provided in the form of blades that are angled relative to each other and about an axis that in use is substantially horizontal.
  • the blades may have a width of 5 - 7.5 cm, such as 5 cm and may be angled at an angle of
  • the bypass is positioned such that, when the polluted water is at the predetermined level in the housing, a flow of additional polluted water results in polluted water being directed into the bypass largely without generating turbulences for at least the majority of the polluted water below the predetermined level.
  • the apparatus may be arranged such that, when the polluted water has reached the predetermined level in the housing, a flow of additional polluted water is substantially evenly distributed around at least a portion of the bypass.
  • the bypass may be provided in any suitable form.
  • the bypass comprises a tube that may be
  • the bypass is positioned at a central location within the housing and may be entirely surrounded by the polluted water when the polluted water is at the predetermined level within the housing.
  • the bypass may be arranged to guide the polluted water though an entire depth of the housing or at least through a portion thereof.
  • the predetermined level may be determined by a position of an upper opening through which the bypass receives the polluted water when the polluted water is at the
  • the apparatus may be arranged such that in use an inflow of polluted water into the inlet portion of the apparatus is at a level that is in the proximity or of, or
  • the apparatus may be arranged such that the inflow of polluted water into the inlet portion of the apparatus is at a level relative to the predetermined level such that for a particular application sufficient polluted water is filtered by the at least one filter element.
  • the level of the inflow of polluted water into the inlet portion is within a range of 20 - 10cm, 10 - 5cm or 5 - lcm above the predetermined level.
  • the apparatus may be symmetrical relative to one or more planes through the apparatus.
  • the apparatus may be
  • the one or more planes are oriented substantially along the direction of gravity.
  • the apparatus in accordance with embodiments of the first or second aspect of the present invention has further practical advantages.
  • early drainage water for example caused by an onset of rainfall, usually includes a relatively large portion of contaminants as especially the onset of the rain washes the contaminants off surfaces and moves waste items.
  • the apparatus may be arranged such that the housing portion is sufficiently large and the filter element suitably structured such that, even though these contaminants and waste items accumulate within the housing and cause partial blockage of the filter element, the apparatus can continue to operate until the filter elements are fully covered at which time polluted water will be directed into the bypass.
  • the further polluted water usually carries significantly less contaminations and waste items after the initial wash off.
  • the bypass may be positioned such that turbulences within the polluted water below the predetermined level can largely be avoided, it is less likely that the contaminants and the waste items that have accumulated within the housing are directed into the bypass and discharged.
  • the housing of the apparatus comprises a container.
  • the container may be positioned at a bottom portion of the apparatus such that only when the container is filled with polluted water, further polluted water received at the inlet portion of the apparatus can exit through the at least one filter element.
  • the apparatus may also be arranged such that the
  • the at least one filter element may form a wall portion of the housing and in one embodiment the apparatus comprises a plurality of filter elements that form wall portions of the housing. A person skilled in the art will appreciate that any suitable filter element is envisaged.
  • the filter element may be arranged to filter any suitable size of particles.
  • a first filter element is arranged to filter relatively coarse particles and a second filter element is arranged to filter relatively fine particles as well as hydro carbons.
  • the size of the mesh gradually decreases towards a bottom of the inner housing.
  • the filter element may comprise any suitable material or composite material.
  • the material of the filter element may comprise metal or a polymer material such as plastics.
  • the apparatus may be arranged for throughput of water exclusively by gravity.
  • the apparatus may be arranged for positioning within the ground.
  • an upper face of the apparatus is exposed for receiving the polluted water when the
  • the apparatus is positioned in the ground.
  • the apparatus may be arranged for positioning entirely within the ground and may be structured for receiving the
  • the apparatus is arranged for positioning at least partially above ground, but is arranged to receive the polluted water from a conduit, such as a downpipe or the like.
  • the apparatus may also be configured to receive polluted water from one or more conduits connected to the apparatus.
  • the housing of the apparatus may be an inner housing portion and the apparatus may also comprise an outer housing portion within which the inner housing portion is positioned.
  • the apparatus may be arranged such that the inner housing portion is removable and the at least one filter element can be cleaned in a convenient manner.
  • the apparatus is arranged such that the inner housing portion with the at least one filter element can be pulled out of the outer housing for example when the apparatus is positioned in the ground.
  • the apparatus is arranged such that the discharge rate of filtered water using substantially clean filter elements is comparable or substantially equal to a discharge rate of the bypass or lower than the discharge rate of the bypass such that in use blockage of the filter element does not substantially reduce a flow of polluted water through the apparatus .
  • the apparatus may be arranged such that, when the filter element is partially blocked and/or an inflow of polluted water increases beyond a predetermined threshold level, polluted water is directed into the bypass even though the filtered polluted water still exits the apparatus via the at least one filter element. If the apparatus comprises the above-described container, at least a portion of the contaminants and waste items may still accumulate in the container even though a portion of the polluted water is directed into the bypass.
  • the apparatus may be arranged such that in use at least a portion, or the entire, filter element is submerged in unfiltered polluted water at a first side and filtered polluted water at a second
  • the apparatus may comprise a receptacle element arranged to receive polluted water and disposed in a manner such that in use at least a portion of both the first and second sides are submerged in the polluted water.
  • the bypass may be arranged in a manner such that polluted water bypasses the receptacle element .
  • the receptacle element may allow the filter element to be entirely submerged in polluted water, retained in the receptacle element, during use.
  • the receptacle element may comprise a bottom portion for collecting contaminants filtered by the filter element.
  • the receptacle element may be arranged in a manner such that in use polluted water contained inside the receptacle element overflows a portion of the receptacle element after being filtered by the filter element. That portion may be arranged such that polluted water flows from the receptacle element through an opening.
  • the size of the opening may be adjustable to adjust a flow of polluted water.
  • the receptacle element forms walls of the housing.
  • the apparatus also comprises a second filter element for filtering the polluted water.
  • the second filter element may comprise a particle capturing filter arranged to capture particles contained in the polluted water.
  • the second filter element may be arranged to capture hydrocarbon particles.
  • the second filter element may be disposed around at least a portion of the bypass and may entirely surround a portion of the bypass.
  • the second filter element has a central hollow portion arranged to fit around the bypass and may comprise a plurality of radially projecting vanes arranged to increase the filtering surface.
  • the apparatus further comprises a bypass cap disposed about an inlet opening of the bypass in a manner such that in use polluted water received from the inlet is prevented from entering the bypass directly.
  • the bypass cap may be disposed in a manner such that polluted water received from the inlet of the housing flows into the bypass only after having entered a body of polluted water surrounding the bypass in the housing.
  • the apparatus may further comprise an indicator for indicating a level of polluted water within the housing and/or a level of contaminants accumulated within the housing.
  • the indicator may be in any suitable form such as in the form of a visual pop up such as a floating device.
  • the indicator may comprise a pressure switch and emitter that emits a signal to a remote computing device.
  • other arrangements are envisaged.
  • the present invention provides an apparatus for filtering polluted water, the apparatus comprising:
  • a housing having an inlet for receiving the polluted water
  • a filter element for filtering the polluted water, the filter element being positioned such that in use polluted water is filtered by the filter element before exiting the housing;
  • the apparatus may in particular be suitable for Onsite Stormwater Detention.
  • the apparatus is arranged such that polluted water flows through the container portion into the housing.
  • the container portion may comprise an open bottom portion and may be arranged directly above the housing.
  • the container portion has vertical wall portions and at least a wall portion has an edge that is lower than adjacent wall portions such that the
  • polluted water received beyond a predetermined level within the container portion can flow over the edge of the at least one wall portion thereby bypassing the at least one filter element.
  • a height of the edge By adjusting a height of the edge, a volume of the polluted water that is filtered can be controlled. For example, the height of the edge may be adjusted such that an entire inflow of polluted water is treated .
  • the present invention provides a method of filtering polluted water, the method comprising the steps of:
  • the method is conducted such that when the level of the polluted water within the housing increases, the bypass is at least partially surrounded by the
  • the method may be conducted such that during the step of filtering the polluted water, a first and a second
  • the method may further comprise filtering hydrocarbon particles in the polluted water using a further filter element .
  • the method may be conducted such that polluted water directed into an inlet of the housing does not directly enter the bypass.
  • the method may be conducted such that, when the polluted water reached the predetermined level in the housing, a flow of additional polluted water is substantially evenly distributed around at least a portion of the bypass.
  • the method may be conducted such that, when the polluted water has reached the predetermined level in the housing, polluted water is distributed around at least a portion of the second filter element.
  • the step of bypassing the filter element may comprise directing polluted water into the bypass at a level that is in the proximity of, or substantially at, a level at which the polluted water is directed into the housing.
  • the step of bypassing the filter element may comprise directing polluted water into the bypass at a level that is within a range of 20 - 10cm, 10 - 5cm or 5 - lcm below the level at which the polluted water is
  • the method may also comprise controlling or adjusting the predetermined level whereby a rate or volume of polluted water that is filtered for a given inflow of polluted water can be controlled or adjusted.
  • the method may comprise moving an upper opening of a bypass for bypassing the at least one filter element.
  • the present invention provides an apparatus for filtering polluted water, the apparatus comprising:
  • a housing having an inlet for receiving the polluted water
  • a filter element for filtering the polluted water, the filter element being positioned such that in use polluted water is filtered by the filter element before exiting the housing;
  • the apparatus is arranged such that, when a level of the polluted water increases within the housing, an opening of the bypass at least partially surrounds the polluted water and, beyond a predetermined level of polluted water, polluted water flows into the bypass from directions around at least a portion of the polluted water.
  • the opening of the bypass of the apparatus in accordance with the fifth aspect of the present invention may be entirely open to allow unobstructed inflow of polluted water. Further, the opening of the bypass may in use surround the polluted water when the polluted water is at the predetermined level.
  • Figure 1 shows a schematic three-dimensional top view of an apparatus in accordance with an embodiment of the present invention
  • Figure 2 illustrates a further three-dimensional top view of the apparatus of Figure 1 without a grating
  • Figure 3 shows a three-dimensional side view of the apparatus of Figure 1;
  • Figure 4 shows a three-dimensional top view of an
  • Figure 5 illustrates a three-dimensional side view of the apparatus of Figure 4.
  • Figure 6 shows an apparatus for On-Site Stormwater
  • Figure 7 shows a perspective view of an apparatus in accordance with another embodiment of the present
  • Figure 8 shows a side cross-sectional view of the
  • Figure 9 shows a perspective view of a bypass and a filter element in accordance with an embodiment of the present invention .
  • Figure 10 shows a side cross-sectional view of the
  • Figure 11 shows a side view of the top portion of an apparatus in accordance with an embodiment of the present invention.
  • FIG 12 shows top views of two grates in accordance with embodiments of the present invention.
  • Figure 13 is a flow chart illustrating a method in
  • the apparatus may for example be used for filtering rain water before the rain water is directed into receiving waters or storm water harvesting systems.
  • the apparatus may also be used filtering any other type of water from industrial or non- industrial sources.
  • the apparatus in accordance with embodiments of the invention comprises an inner housing that has an inlet portion for receiving polluted water, and at least one filter element at a wall portion of the inner housing.
  • the filter element is arranged such that polluted water received at the inlet portion can exit the apparatus through the filter element.
  • the apparatus comprises a bypass for directing polluted water in a manner to bypass the filter element. When a level of polluted water increases within the inner housing, the bypass is at least partially surrounded by the polluted water within the housing. Beyond a predetermined level of the polluted water within the housing, further polluted water that is received at the inlet portion of the
  • the apparatus exits the housing through the bypass thereby bypassing the filter element.
  • blockage of at least parts of the filter element at a suitable inflow of polluted water may cause an increase of a level of the polluted water within the housing such that further polluted water beyond the predetermined level flows into the bypass.
  • the bypass is provided in the form of a tube or another type of conduit and is positioned at a central location within the inner housing.
  • the inner housing is positioned within an outer housing and the apparatus is arranged such that the inner housing can be removed such as pulled out of the outer housing for cleaning of the filter element.
  • the apparatus in accordance with at least an embodiment of the present invention provides significant advantages.
  • the apparatus is arranged such that, when the polluted water is at the predetermined level within the inner housing, inflow of subsequent polluted water causes no or only a reduced level of turbulences within the polluted water within the housing, which reduces the likelihood that contaminants accumulated within the inner housing are moved and directed into the bypass for
  • the size and volume of the inner housing can be maximized.
  • FIG. 1 to 3 of the accompanying drawings there is shown a schematic three-dimensional view of an apparatus 10 in accordance with an embodiment of the present invention.
  • the apparatus 10 is positioned in a stormwater pit.
  • the apparatus 10 may be retrofitted into an existing stormwater pit regardless of whether the existing stormwater pit has a grate, mesh top or is part of an in kerb slot entry.
  • the apparatus 10 comprises an inner housing 12 and a plurality of filter screens 14 (not shown) forming wall portions of the inner housing 12.
  • the inner housing 12 is positioned in an outer housing 16 and is removable from the outer housing 16. It will be appreciated that the apparatus may or may not comprise the outer housing.
  • the outer housing 16 forms a part of storm water pit.
  • a bypass 18 in the form of a tube is positioned in the inner housing 12.
  • the inner housing 12 has an inlet portion 20 for receiving polluted water such that an inflow of polluted water can enter the inner housing 12 and subsequently filtered polluted water can enter the outer housing 16 in which it is directed to an outlet 22. In this way, contaminants in the polluted water such as gross pollutants and sediments can be removed from the polluted water and accumulate within the inner housing 12.
  • the inlet portion 20 has an upper edge 21 and a tapered portion 23 which in use guides the polluted water into the inner housing 12.
  • the bypass 18 has an inlet opening 24 that defines the predetermined level to which the polluted water increases within the housing until further polluted water flows in the bypass. In this embodiment, the inlet opening 24 of the bypass 18 is approximately level with the upper edge 21 of the inlet portion 20.
  • the inlet opening 24 of the bypass 18 may have any suitable height relative to the inlet portion 20.
  • the inlet opening 24 of the bypass 18 may be within a range of 20 - 10cm, 10 - 5cm or 5 - 1cm below the inlet portion 20.
  • the relative position of the inlet opening 24 of the bypass 18 may be variable relative to the inlet portion 20. For example, by varying the relative position of the inlet opening 24 of the bypass to the upper edge 21 of the inlet portion 23, a throughput rate of filtered polluted water through the filter screens 14 can be controlled.
  • the inlet opening 24 of the bypass 18 is positioned at a central location of the apparatus 10 and consequently the apparatus 10 is arranged such that in use polluted water can flow substantially evenly from any transversal
  • bypass 18 may not necessarily be positioned at a central location within the apparatus 10, but may alternatively be positioned off centre or at an edge portion such that in this case the inflow of further polluted water may be substantially evenly distributed around only a portion of the bypass 18.
  • the apparatus 10 is arranged such that in use an inflow of polluted water into the apparatus 10 is at a relatively short distance above the predetermined level, which also contributes to reducing turbulences in the polluted water in the inner housing 12.
  • bypass 18 is positioned to direct polluted water through the entire depth of the inner housing 12 and through a bottom wall of the inner housing 12.
  • the bypass 18 may direct the polluted water only though a portion of the depth of the inner housing 12.
  • the bypass 18 may be an angled tube that is positioned to direct
  • Figure 1 illustrates the apparatus 10 positioned in a typical stormwater pit.
  • a grate 26 of the stormwater pit may be lifted to access the apparatus 10 and replace or clean the apparatus 10 in a convenient manner.
  • the apparatus 10 may be arranged such that the apparatus can be pulled out of the stormwater pit for this purpose.
  • Installation of the apparatus 10 within an existing stormwater pit or the like may or may not comprise use of an adaptor or suitable bracket, which also allow installation of the apparatus 10 in non-standard stormwater pits or the like.
  • the inner housing 12 has 4 side walls and each side wall comprises a filter element (not shown) .
  • the filter elements are in this example filter screens that comprise a mesh.
  • a person skilled in the art will appreciate that any number of filter elements could be positioned at an any number of side walls, which could have any suitable shape (for example a square, rectangular or circular shape) to suit a particular application.
  • the filter elements may comprise any suitable material.
  • the material of the filter elements may comprise metal or polymer material such as plastics.
  • the material may be a composite material.
  • the filter elements comprise multiple layers or form a three-dimensional screen .
  • the mesh of the filter screens may have any suitable size or sizes.
  • the mesh may be relatively fine at the bottom of the housing and
  • the apparatus 10 may be formed from various materials.
  • the apparatus 10 may comprise galvanised steel, stainless steel or polymeric materials.
  • the inner housing 12 may further comprise an indicator for indicating a level of polluted water within the housing and/or a level of contaminants accumulated within the housing.
  • the indicator may comprise a
  • the indicator may comprise a pressure switch that detects a change of pressure within the housing 12.
  • the indicator may further comprise an emitter that emits a signal indicative of a pressure change to a remote computing device.
  • an emitter that emits a signal indicative of a pressure change to a remote computing device.
  • a position of the bypass 18 within the inner housing 12 is adjustable by moving the bypass 18 up or down, which allows adjusting the predetermined level and consequently adjusting a volume of polluted water that is filtered before polluted water is directed into the bypass 18 (for a given flow of polluted water and a given level of contamination) .
  • the apparatus may comprise a sliding sleeve and flange arrangement at a bottom region of the inner housing 12 such that the height of the inlet portion 24 of the bypass 18 can be adjusted.
  • FIGs 4 and 5 there is shown an apparatus 40 in accordance with a further embodiment of the present invention. Similar to the apparatus 10 shown in Figures 1 to 3, the apparatus 40 is implemented in the form of a storm drain that can be inserted into a
  • the apparatus 40 also comprises an inner housing 42 that can be inserted into an outer housing such as a stormwater pit.
  • the inner housing has an inlet portion 43 for
  • the apparatus further comprises a plurality of filter screens 44 (not shown) forming vertical wall portions of the inner housing 42, and a bypass 48 in the form of a tube that is positioned at a central location within the inner housing 42.
  • a flow of polluted water enters the inner housing 42 and is filtered by the filter screens 44 that form wall portions of the housing 42.
  • the bypass 48 is surrounded by polluted water and beyond a predetermined level of the polluted water within the inner housing 42, further polluted water flows through the bypass 48.
  • the level of polluted water within the inner housing 42 may increase due to at least partial blockage of the plurality of filter screens, for example by contaminants captured within the inner housing 42. Additionally or alternatively, the inflow of polluted water into the inlet portion 43 may be higher than the throughput of filtered polluted water through the plurality of filter screens thereby causing an increase of a level of polluted water within the housing 42.
  • the apparatus 40 comprises further filter elements 52.
  • the further filter elements 52 may be arranged as cation exchangers.
  • the further filter elements 52 are removably coupled to an outside of the filter screes 44.
  • Figure 5 illustrates the apparatus 40 in which the further filter elements 52 have been removed.
  • the further filter elements 52 are filters that have a finer mesh than the filter screens 44.
  • the further filter elements 52 are arranged to filter relatively small particles and hydrocarbons from the polluted water.
  • the inner housing 42 of the apparatus 40 further comprises a container 54 that is arranged at a bottom region of the apparatus 40. The apparatus 40 is arranged such that an initial inflow of polluted water received at the inlet portion 43 is collected within the container 54. When the container 54 is filled with
  • polluted water further polluted water received within the inner housing 42 can exit the inner housing 42 through the filter screens 44 and the further filter elements 52.
  • the container 54 increases the volume of the inner housing and thereby extends the service time of filtering polluted water without the need of removing contaminants from the inner housing. Further, during seguential rain fall events when contaminants accumulated within the inner housing 42 stay wet, the contaminants will eventually be broken down to finer materials. The finer materials then sink into the container 54 by virtue of gravity and are thereby
  • OSD On-site Stormwater Detention in accordance with an embodiment of the invention.
  • OSD relates to a method of collecting polluted water, storing the polluted water temporarily and subsequently slowly releasing the stored polluted water to reduce the risk of flooding problems.
  • the apparatus 60 has a housing 62 and an inlet portion 63 for receiving polluted water from a pipe 68. Similar to the apparatus 40 shown in Figures 4 and 5, the housing 62 of the apparatus 60 comprises a container 66 at a bottom region of the housing 62 and filter screens 64 that form vertical wall portions of the housing 62. In this particular embodiment, the apparatus 60 further comprises a container portion in the form of a shroud.
  • the shroud 70 is mounted to a wall 72 that incorporates the pipe 62 through which polluted water enters the apparatus for flowing through the shroud 70 into the housing 62 of the apparatus 60.
  • the shroud 70 has vertical wall portions wherein wall portion 74 which is substantially opposite of the pipe 68 has a top edge that is lower than remaining edges of wall portions 76.
  • the top edge of the wall portion 74 is approximately at the same level as the lowermost edge of the pipe 68.
  • the wall portion 74 is positioned such that a level of the edge of the wall portion 74 coincides with a top water level (TWL) of the OSD so that by-pass only occurs when an OSD maximum containment level is exceeded.
  • TWL top water level
  • This TWL is set by the edge of the wall 74 and can be varied to suit requirements. In this way, when a level of polluted water increases above the inlet portion 63, further polluted water is
  • the container portion may be located spaced relative to the housing 62.
  • the pipe 68 may be positioned at different locations.
  • the pipe 68 may be positioned at a base portion or bottom portion of the OSD.
  • the filter screens 64 may then be positioned at any suitable orientation (vertical or horizontal) to satisfy design and performance reguirements .
  • FIG. 7 of the accompanying drawings there is shown a schematic three-dimensional view of an apparatus 70 in accordance with an embodiment of the present invention.
  • the apparatus 70 is related to the apparatus 10 of Figure 1 and may be fitted into any stormwater pit.
  • the apparatus 70 comprises an inner housing 12 and a plurality of filter screens 14.
  • the inner housing 12 is positioned in an outer housing 16 and is removable from the outer housing 16.
  • a bypass 18 in the form of a tube is positioned in the inner housing 12.
  • Filtered water enters into a receptacle element, which is provided in the form of compartment 72.
  • filtered water fills the compartment 72 and overflows from the compartment 72 into the outer housing 16. Heavier contaminant particles are captured by the screens 14 and accumulate within a contaminant portion 74.
  • filter screens 14 are entirely submerged in water so that the differential pressure between the internal surfaces of screens 14 and the external surfaces of screens 14 is minimised. A low differential pressure allows the filter screens to perform at a higher efficiency.
  • Polluted water that overflows the compartment 72 enters the outer housing 16 in which it is directed to an outlet 22. In this way, contaminants in the polluted water such as gross pollutants and sediments can be removed from the polluted water and accumulate in contaminant chamber 74.
  • FIG. 8 there is shown a side cross- sectional view of the apparatus 70. A rim of the apparatus 70.
  • FIG. 8 also shows a secondary inlet 82 of the apparatus 70, which is not shown in Figure 7.
  • the secondary inlet 82 is positioned at a bottom level of the outer housing 16 and allows connecting the apparatus 70 to a polluted water network. Water that is inflowing through the inlet 82 is not filtered by apparatus 70 and can exit the apparatus 70 through outlet 22. This arrangement also allows multiple units to be connected in series in a drainage line or network .
  • the cross sectional representation shown in Figure 8 shows an internal second filter 84, which filters the polluted water before the polluted water exits to the outer housing 16.
  • the filter 84 has a filtering function that is
  • the filter 84 is positioned around a portion of the bypass 18 and in use may be completely submerged by polluted water.
  • the central position of filter 84 around the bypass 14 allows it to work efficiently and in good synergy with filter screens 14. During operation both filters are at least partially submerged and the flow path of polluted water circulating into compartment 72 is maximized
  • FIG. 9 there is shown a perspective view of the bypass 18 of the apparatus 70 with the above mounted second filter 84.
  • the second filter 84 captures particles contained in the polluted water, in particular hydrocarbon particles.
  • the second filter 84 is disposed around a section of bypass 18, which fits into a central hollow portion of the filter 84.
  • the second filter 84 has a plurality of radially projecting vanes.
  • the configuration of the filters in the apparatus 70 provides a central position for the second filter 84, improves filtering efficiency and allows easy replacement and maintenance of the filters.
  • mounting bracket 92 can be removed and the second filter 84 can be replaced before remounting the second filter with the bypass 18 in the inner housing 12.
  • the bypass 18 can be withdrawn, which facilitates cleaning or replacing of the filter 84.
  • FIG 10 there is shown a side cross- sectional view of an apparatus 100 in accordance with another embodiment of the present invention.
  • the apparatus 100 is configured in a manner that is similar to that of the apparatus 70.
  • apparatus 100 has multiple inlet portions disposed at the top of the apparatus 100.
  • the first polluted water inlet 20 is covered by an inlet grate 102.
  • the inlet grate 102 is generally arranged for collection of storm water, for example, along a road gutter or pavement surface.
  • the apparatus 100 also comprises two additional inlets 104 and 106 which are used to connect the apparatus 100 to other water sources.
  • the inlets 104 and 106 could be connected to another stormwater pit without filtering capabilities. Polluted water incoming through the inlets 104 and 106 is filtered in the same way as polluted water entering the apparatus 100 through grate 102.
  • the apparatus 100 also comprises a bypass cap above the top opening of the bypass for preventing polluted water received from the inlets 104 or 106 from entering the bypass 18 directly.
  • the bypass cap is provided as lid 108.
  • Water incoming at high pressure from the inlets 104 and 106 is prevented from entering bypass 18 by a skirt of the lid 108 and flows into the main body of water in the inner housing 12. Polluted water can only enter the bypass 18 through gap 109.
  • the lid 108 can be set into place using a webbed portion connected to the bypass (not shown in
  • a further function of the lid 108 is to prevent buoyant materials from entering into the bypass 18.
  • FIG. 11 there is shown a detail of a top portion 110 of an apparatus in accordance with an embodiment of the present invention.
  • the top inlet of the apparatus is covered by an inlet grate 112 and the bypass 18 is arranged such that the top entrance of the bypass 18 is disposed between the top and the bottom of the inlet grate 112.
  • the grate 112 allows for the reduction of the influx of any buoyant material 113, floating on top of the body of water contained in the apparatus, into the bypass 18.
  • the grate 112 comprises a plurality of blades 114 extending from the top to the bottom of the grate.
  • the grate 112 is positioned leveled with the road. When a heavy flow of water moves along the road gutter, a portion of the water may flow with a high velocity above the top of grate 112.
  • the blades 114 of the grate 112 are arranged to reduce this Venturi effect.
  • the blades 114 are spaced at least 2 cm from each other to minimize suction.
  • the blades 114 are tilted by an angle of 15 ° about a horizontal axis. The angled blades 114 allow creating water currents inside the apparatus and which push buoyant material 113 away from the bypass 18.
  • the angled blades 114 also improve the safety of grate 112 and the entire apparatus.
  • the angled blades 114 in fact reduce potentially harmful interference of the inlet grate 112 with pedestrian or bicycle traffic by not allowing, for example, heels of a shoe or a bicycle wheel to be captured by the blades of the inlet grate.
  • the inlet grate 112 comprises in the example a removable central section 116, which can be used to inspect and possibly service the apparatus.
  • the Grates 120 and 125 have respective removable central sections 122 and 126.
  • the grate 120 is suitable for covering an apparatus with a square shape and the grate 125 is suitable for covering an apparatus circular shape.
  • the circular grate 125 provides further protection for bicycle riders.
  • FIG. 13 there is illustrated a method 130 of filtering polluted water using an apparatus such as the apparatus 10 shown in Figures 1 to 3, the apparatus 40 shown in Figures 4 to 6, the apparatus 70 shown in Figures 7 to 9 or the apparatus 100 shown in Figure 10.
  • the method 130 comprises the initial step 132 of directing polluted water into the housing 12; 42 of the apparatus 10; 40.
  • Step 134 filters the polluted water such that filtered polluted water exits the housing 12; 42 through a filter element 14; 44.
  • Step 136 allows an increase of a level of the polluted water within the housing 12; 42 to a
  • Step 138 bypasses the filter element 14; 44 if blockage of the filter element 14; 44 results in insufficient throughput.
  • the filter elements may not necessarily form wall portions of the inner housing but may be positioned at another suitable location (for example coupled to a suitable tubing system that directs polluted water out of the inner housing) .
  • the filter elements may be provided in any suitable form and the apparatus may comprise any number of filter elements.
  • the apparatus may also be provided in the form of an in-line device that, for example, may be arranged for connection to a storm water pipe and may or may not be arranged for positioned in ground.
  • the apparatus for filtering polluted water may, in a variation of the embodiment illustrated with reference to Figures 1 to 5, not necessarily comprise a bypass positioned at a central location and within the inner housing.
  • the opening may be entirely open

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Filtration Of Liquid (AREA)

Abstract

La présente invention concerne un appareil destiné à filtrer de l'eau polluée. L'appareil comporte un logement muni d'une entrée destinée à recevoir l'eau polluée. L'appareil comporte également un élément filtrant destiné à filtrer l'eau polluée. L'élément filtrant est positionné de telle sorte qu'en cours d'utilisation, l'eau polluée est filtrée par l'élément filtrant avant de quitter le logement. De plus, l'appareil comprend une dérivation pour le passage de l'eau polluée disposée de manière à permettre à l'eau polluée de contourner l'élément filtrant. L'appareil est disposé de telle sorte que, lorsqu'un niveau de l'eau polluée augmente à l'intérieur du logement, la dérivation est au moins partiellement entourée par l'eau polluée et, au-delà d'un niveau prédéfini d'eau polluée, l'eau polluée s'écoule dans la dérivation.
PCT/AU2015/000391 2014-07-11 2015-07-03 Appareil destiné à filtrer de l'eau polluée Ceased WO2016004456A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
AU2014902689 2014-07-11
AU2014902689A AU2014902689A0 (en) 2014-07-11 An apparatus for filtering drainage water
AU2014904823 2014-11-28
AU2014904823A AU2014904823A0 (en) 2014-11-28 An apparatus for filtering drainage water
AU2015901316A AU2015901316A0 (en) 2015-04-13 An apparatus for filtering drainage water
AU2015901316 2015-04-13

Publications (1)

Publication Number Publication Date
WO2016004456A1 true WO2016004456A1 (fr) 2016-01-14

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WO (1) WO2016004456A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999027204A1 (fr) * 1997-11-21 1999-06-03 University Of South Australia Separateur de pollution et appareil de filtration
US20060016767A1 (en) * 2004-07-23 2006-01-26 I.S.C. Environmental, Inc. Fluid filter system and related method
US20060207922A1 (en) * 2005-03-21 2006-09-21 Dussich George V A I Storm water filtration system
US20080073277A1 (en) * 2006-09-25 2008-03-27 Paoluccio John A Catch basin filter absorber apparatus and method for water decontamination
WO2008104030A1 (fr) * 2007-03-01 2008-09-04 Jack Mckenzie Droomer Séparation de matières solides ou particulaires d'un écoulement fluide, en particulier d'un écoulement d'eaux de ruissellement, et circuit de dérivation du trop-plein
WO2013028475A1 (fr) * 2011-08-19 2013-02-28 Wdd Engineering, Llc Séparateur hydrodynamique de courant fluidique comportant une dérivation à haut débit
KR20130021598A (ko) * 2011-08-23 2013-03-06 씨앤씨주식회사 교량 및 우수맨홀 초기우수처리장치

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999027204A1 (fr) * 1997-11-21 1999-06-03 University Of South Australia Separateur de pollution et appareil de filtration
US20060016767A1 (en) * 2004-07-23 2006-01-26 I.S.C. Environmental, Inc. Fluid filter system and related method
US20060207922A1 (en) * 2005-03-21 2006-09-21 Dussich George V A I Storm water filtration system
US20080073277A1 (en) * 2006-09-25 2008-03-27 Paoluccio John A Catch basin filter absorber apparatus and method for water decontamination
WO2008104030A1 (fr) * 2007-03-01 2008-09-04 Jack Mckenzie Droomer Séparation de matières solides ou particulaires d'un écoulement fluide, en particulier d'un écoulement d'eaux de ruissellement, et circuit de dérivation du trop-plein
WO2013028475A1 (fr) * 2011-08-19 2013-02-28 Wdd Engineering, Llc Séparateur hydrodynamique de courant fluidique comportant une dérivation à haut débit
KR20130021598A (ko) * 2011-08-23 2013-03-06 씨앤씨주식회사 교량 및 우수맨홀 초기우수처리장치

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