WO1999027204A1 - Separateur de pollution et appareil de filtration - Google Patents

Separateur de pollution et appareil de filtration Download PDF

Info

Publication number
WO1999027204A1
WO1999027204A1 PCT/AU1998/000967 AU9800967W WO9927204A1 WO 1999027204 A1 WO1999027204 A1 WO 1999027204A1 AU 9800967 W AU9800967 W AU 9800967W WO 9927204 A1 WO9927204 A1 WO 9927204A1
Authority
WO
WIPO (PCT)
Prior art keywords
stormwater
filtration
chamber
inlet
filter apparatus
Prior art date
Application number
PCT/AU1998/000967
Other languages
English (en)
Inventor
David Pezzaniti
Original Assignee
University Of South Australia
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 AUPP0481A external-priority patent/AUPP048197A0/en
Priority claimed from AUPP5616A external-priority patent/AUPP561698A0/en
Application filed by University Of South Australia filed Critical University Of South Australia
Priority to US09/554,300 priority Critical patent/US6241881B1/en
Priority to AU13267/99A priority patent/AU733772B2/en
Priority to DE19882826T priority patent/DE19882826T1/de
Priority to NZ504539A priority patent/NZ504539A/en
Priority to GB0011622A priority patent/GB2346818B/en
Publication of WO1999027204A1 publication Critical patent/WO1999027204A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0012—Settling tanks making use of filters, e.g. by floating layers of particulate material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
    • B01D21/267—Separation of sediment aided by centrifugal force or centripetal force by using a cyclone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2221/00—Applications of separation devices
    • B01D2221/12—Separation devices for treating rain or storm water

Definitions

  • This invention relates to a pollution separator and filtration apparatus, and preferably one that can be used for in-line separation in a stormwater drainage pipe.
  • Stormwater is collected from various surfaces in urban environments and directed through various inlets to a stormwater collection network of pipes and then, often, deposited untreated into various receiving areas which are generally natural water bodies such as streams, rivers, lakes or the sea.
  • the stormwater collection network has to cope not only with stormwater but also a variety of debris, which ranges from gross material such as branches of trees, plastics containers, to smaller material such as sand and very fine material such as silt. Very often toxic or damaging substances such as organic wastes and heavy metals are also carried into the stormwater collection system. Thus oils may be collected from road surfaces and lead may be accumulated from surface depositions.
  • the collected debris causes difficulties in so far as causing visual pollution by the deposition of the gross debris into the natural water bodies.
  • the accumulation of a great deal of sand and silt also causes problems in that natural waterways become clogged by the build-up of such material over-time, and additionally natural grasses and flora and fauna are adversely affected.
  • toxic compounds such as heavy metals are carried by silt and as a result the build-up of silt is often toxic, having both short and long term ramifications to aquatic plant and animal life.
  • a vortex As a means for separation of solids in sewage lines and these vortexes assist in alleviating the tendency of blockage of static separation units by floatable solids.
  • a vortex will tend to have the greatest velocity at its periphery and much lower velocities toward the centre of the vortex, as a result there tends to be a greater deposition of sediments and other non-floatable debris towards the centre of the vortex because velocity is such that the debris does not remain suspended.
  • separators using a vortex often have a collection container, or a take-off conduit below the centre of the vortex to remove sedimented material.
  • the vortex is quite convenient as a means of removal of debris, because it allows for a longer transition time for floatable, a good proportion of which become waterlogged and therefore sink.
  • this invention arises out of the construction of a separation apparatus for separating pollution from stormwater that results in improvements in the management of floatable debris.
  • a stormwater pollution separator and filter apparatus including an inlet for receiving stormwater from a stormwater conduit, said inlet leading through an inlet aperture to a separation chamber and then to a filtration chamber which is positioned below the inlet aperture, a riser leading from the filtration chamber to an outlet for connection with a receiving stormwater conduit, the inlet opening into the separation chamber to create, in use, a swirl action in the separation chamber by reason of the flow of the stormwater, the separation chamber positioned vertically above the filtration chamber, and the filtration chamber having one or more filtration baskets positioned in the filtration chamber to receive substantially all the flow of stormwater from the separation chamber, said baskets spaced apart from a wall defining a periphery of the filtration chamber, and an overflow communicating directly between the inlet and the outlet, and an overflow inhibition means therebetween to prevent flow through the overflow unless a predetermined level of stormwater is exceeded.
  • conduit is to be understood in a broad manner, and is intended to include open channel or closed pipes that are used in the carriage of stormwater.
  • a riser aperture is the sole communication between the filtration chamber and the riser, and a riser aperture headwall positioned so as to be spaced below the inlet aperture, and below tops of the filtration baskets.
  • the separation chamber extends above the inlet aperture and the inlet is bounded from the top by a headwall, so that the level within the separation chamber may elevate above the level of the inlet.
  • a sump is provided and in one convenient form the sump is provided at the base of the riser. Access to the sump in this latter form is provided from the top through the riser, thereby providing direct access independent of access through the separation chamber and filtration chamber. This means therefore that the baskets need not be removed for removal of silt and the like. A removable collection basket may be fitted in the sump for ease of maintenance.
  • Each basket preferably has at least an upper peripheral frame, which facilitates lifting, so that a spreader or other attachment can be made to lift up the basket evenly with a mechanical lifter.
  • the baskets Preferably have an openable bottom, to facilitate discarding any pollution from the basket.
  • the basket may, for example, have a lower peripheral frame, with a hinged lower pan with a catch that can be released to empty the contents of the basket.
  • the lower pan may allow for filtration, by allowing for egress of water, or alternatively may be solid to collect some of the sediment.
  • a rigid frame is provided for the whole of the basket for ease of handling and which is lined with a filter.
  • the frame might be made for example of metal, which is suitable coated with an anti-corrosion coating, or which is made of a corrosion resistant metal.
  • the filters may be an expanded metal mesh, the expanded metal mesh being expanded to an array of lands defining an array of pores, each of the lands being angled relative to the plane of the mesh so that the pores all face towards one edge of the mesh, and in the baskets the mesh is positioned so that the pores are substantially all angled downwardly, thereby minimising clogging of the pores.
  • At least two baskets are provided each with a separate upper frame.
  • the frame is supported spaced below the inlet aperture so that there is a region free of obstruction between a lower part of the inlet aperture and the top of the baskets.
  • a boom means whereby the boom means is able to be positioned at the surface of resting water, such as might occur between rain events, and extend below the surface so as to act as a boom whereby oils and grease can be localised to that portion of the water surface occupied by a respective basket.
  • the boom means may take the form of splitter plates which can be raised and lowered, so that it might be stored above the normal resting level of the water within the filtration chamber but more preferably below and in line with an uppermost part of the baskets.
  • the inlet has a headland, which has a height the same as or lower than the weir, so that there is no escape of floatables over the overflow. This therefore leads to the accumulation of any floatables above the filtration baskets and reduces the chance of oils and other floatable spilling over the weir during high flow events.
  • the inlet and outlet are configured to connect between two ends of an in line stormwater conduit, so that the separation apparatus can be fitted into an existing stormwater conduit.
  • a single upright treatment chamber makes up the separator and the filtration chamber, and that a closure is provided at an uppermost portion thereof for access to both from above.
  • a circular horizontal cross sectional integrally formed wall such as a pipe, with a substantially constant cross section vertically, although this might alsobe provided with segments of a pipe. This facilitates the construction, and allows for ready removal of the filtration baskets.
  • the weir can be of a physical construction or alternatively might be a hydraulic weir created by flow out of the outlet.
  • the invention could be said to reside in a stormwater screening apparatus comprising:- an upper portion and a filtration chamber separated from one another by a floor; a stormwater inlet leading into an inlet portion of the apparatus said inlet portion positioned within an upstream end of the upper portion; a stormwater outlet directing water away from an outlet portion of the apparatus; a treatment portion of the apparatus including a separation chamber in the upper portion receiving stormwater from said inlet portion, at least one filtering aperture passing through the floor to allow for flow of stormwater from the separation chamber to the filtration chamber, a filter fitted to filter stormwater passing through the filtering aperture; the flow of stormwater being sufficiently supported by the floor to allow for disuibution within the separation chamber; a outlet aperture to allow flow from the filtration chamber to the outlet portion of the apparatus; an overflow communicating directly between the inlet portion and the outlet portion.
  • the separation chamber is adapted for the redirection of stormwater flow from an entry direction. More preferably the redirection induces the formation of a swirl in the separation chamber.
  • Swirls are known to deposit fine granular debris towards their centre and coarse or heavier material to the periphery and this then presents an opportunity to configure the location of the filtration apertures to advantage and preferably at least one of the apertures is positioned away from the periphery of the swirl.
  • the precise position of the one or more apertures to take advantage of the swirl action might include a totally central location, or one that is positioned between the centre and the periphery or one that might include an overlap with the centre of the swirl but extends towards one part of the periphery.
  • the redirection of the stormwater flow might be achieved in the separation chamber by the shape of a sidewall of the separation chamber, which might be generally circular in plan view.
  • a redirection and a swirl could also be achieved by a side wall with an angular shaped plan view with the disadvantage that sedimentation is likely to occur at peripheral apices.
  • other means such as suitably positioned deflector barriers might play the same role of redirecting the flow.
  • At least one aperture will be position so that it will receive stormwater only once stormwater has been redirected.
  • there are a plurality of filtration apertures not all of them will require a redirection of stormwater to receive stormwater.
  • At least a first of said apertures is positioned to be spaced apart from one edge of the incoming flow in the upper portion being at a periphery of the swirl or redirection. So that even where the aperture is blocked or silted up stormwater is diverted around the aperture and the strong flow of the peripheral water has a clearing effect. The differential rate of flow within the separation chamber is thus utilised to advantage.
  • One or more other apertures might be similarly positioned.
  • the outlet portion is positioned within the upper part of the chamber so as to facilitate fitting of the apparatus to existing stormwater pipes.
  • overflow inhibition means are provided to inhibit flow of stormwater through the overflow until a predetermined flow is achieved.
  • the overflow inhibition means comprises a weir blocking entry of water to the overflow until it reaches a predetermined level.
  • the outlet portion is located in a downstream end of the upper portion and said apparatus further includes the outlet aperture passing through said floor to permit stormwater to rise from the filtration chamber to the outlet portion or the overflow.
  • the velocity head of water within the separation chamber is significantly lower than in the inlet portion so as to raise the level of water in said chamber and the overflow relative to the inlet portion, and to thereby prevent ingress of water to the overflow.
  • the filters become blocked or for another reason flow through the separation chamber is reduced sufficiently, stormwater no longer enters the separation chamber and flushes from the inlet portion through the overflow so as not to block the stormwater pipe. Additionally any silt or other debris that has built up during low flow high debris rain events, can be flushed directly through the overflow.
  • the level of the floor at the outlet portion is substantially the same as the level of the floor at the inlet portion.
  • the filter has a vertical height and may be columnar, so that a filtration surface is larger than the cross-sectional dimension of the at least one filtration aperture. More preferably the filter extends downwardly from the floor into the filtration chamber, so that debris is collected within the filter.
  • the columnar filter takes the form of a basket which in one form is removable so that the debris can be conveniently emptied. Even should the filter not be removable, debris may be removed by the use of a suction hose.
  • the filter may be constructed using a mesh with a suitable pore size to retain debris based on size. Where a columnar filter is used there is a quite large surface area available for filtration and the pore size can be quite fine and still provide an adequate flow rate through the filtration portion.
  • the mesh may be made from a plastics material to avoid corrosion. Alternatively it may be made of a metal, perhaps of an expanded mesh, so as to perhaps better resist physical damage. The mesh may be suitably supported by a frame if required.
  • the total cross sectional dimension of the filter can be quite large and the flow velocity through the collective area of filter is greatly reduced thereby enhancing filtering efficiency and reducing the chance of blockage.
  • the shape and dimensions of the filter can be varied to suit the particular apphcation. It may only be necessary to have a squat filter with shallow walls where the depth is considerably smaller than the width of the filter, alternatively the filter may be deeper. Similarly the cross sectional dimensions of such a filter need not be constant, so that it may be tapered downwardly, or even rounded downwardly. It may also be desirable that a silt collecting arrangement be provided whereby the columnar or other filter includes a solid lower portion. The solid lower portion would act as a cup where silt and very fine material could be deposited.
  • a silt collecting depression may also be provided in the base of the filtration chamber where silt will have a tendency to collect.
  • the provision of such a depression will facilitate cleaning whereby a suction cleaner need not be drawn over the entire base to remove silt but need only be used in the depression.
  • the filtration aperture need not necessary match the width of the filter, and the filter may be considerably wider, and fit under the floor, so as to extend under portions of the upper portion in addition to the separation chamber.
  • the filtration aperture need not necessarily be constrained within the separation chamber, and may extend through to the filtration inlet channel.
  • a flow path of stormwater entering the separation chamber is offset from the direction of flow through the filtration inlet channel, so that in use stormwater is diverted to enter the separation chamber and filtration aperture. It is preferred not to receive stormwater directly from the inlet onto the filter, because this has the effect of building up a wall of debris which then backfills to the stormwater inlet blocking the apparatus and flow of stormwater. Additionally there is a problem that inertia can cause some of the debris to lodge firmly within the filter and thereby blocking or even damaging the filter.
  • the separation chamber is elongate in the direction of the flow of stormwater through the stormwater pipe to which the apparatus is fitted, the inlet portion is at the upstream end of the upper portion of the apparatus, adjacent to one elongate side of the separation chamber, a filtration inlet channel extends along the said one side of the separation chamber away from the inlet portion of the apparatus and communicates with the separation chamber and is separated therefrom by a filtration inlet channel wall, said overflow comprising a channel extending adjacent to the filtration inlet channel on a side opposite to the separation chamber, said outlet portion positioned at a first end and preferably downstream of the separation chamber.
  • the floor is substantially flat, and substantially level.
  • the flow path of the stormwater is reversed to the extent that the separation chamber is separated from the filtration inlet channel.
  • stormwater is diverted laterally for the inlet distal aperture, but needs to be reversed for the two inlet proximal apertures.
  • the filtration inlet channel wall does not seal the filtration inlet channel from the separation chamber, but acts only as a weir, so that at lower flows of stormwater the filtration inlet channel is fully separated from the separation chamber and therefore directs stormwater to the inlet distal filtration aperture, but at larger flows, stormwater spills over the filtration inlet channel wall directly to the inlet proximal filtration aperture. It can be seen that this construction generally directs most of the debris from low flow rate rain events with high debris to the inlet distal filtration aperture rather than to the remaining aperture. Depending upon the position, however, it may be desired that the inlet channel wall only extends adjacent a first half or none of the inlet proximal filtration aperture and this may be preferred where the one filter is inadequate to cope with debris from low flow rain events.
  • the position of the rising aperture may be varied but generally is required to be in the overflow or outlet portion so that the level of water in the overflow at least adjacent the inlet portion is higher than that of the inlet portion except during large flow rain events. This then inhibits flow through the overflow except during large flow rain events.
  • the modular construction might envisage two end modules, an upstream end module including an upstream end of the separation chamber, the inlet portion, and an upstream end of the overflow and the separation chamber inlet channel, and a downstream end module comprising the outlet, and a downstream end of the separation chamber, and at least one central module capable of fitting between the two end modules, an end module or other central modules, the central module comprising at least a central portion of the overflow, a central portion of the separation chamber including one filtration aperture, and perhaps a central portion of the filtration inlet channel.
  • the filtration chamber will be modular in a similar manner, and end modules and central modules may be provided separately for the filtration chamber, or may be provided together with a corresponding upper portion module. It will also be readily understood that other forms of the invention may also be made in a modular form. This modular arrangement provides for flexibility to increase the capacity or reduce the capacity as appropriate for a particular location.
  • Figure I is a plan view of the first embodiment of this invention, viewed from above, showing the general layout of the stormwater separator
  • Figure 2 is a side elevation through section II-II of figure 1 ,
  • Figure 3 is a side elevation through section III-III of figure 2
  • Figure 4 is a schematic drawing of multiple baskets within the filtration chamber
  • Figure 5 is a plan view of the second embodiment, viewed from above,
  • Figure 6 is a cross sectional elevation of the second embodiment viewed through VI- VI of figure 5
  • Figure 7 is a a perspective part cross sectional view through the filtration and separation chambers of the second embodiment.
  • Figure 8 is a plan view of a third embodiment of the upper portion of the stormwater screening apparatus showing the general layout of the upper portion
  • Figure 9 is a similar view to that shown in figure 1 of a fourth embodiment of the upper portion.
  • Figure 10 is a cross sectional view through X-X of Figure 8 showing the position of the filtration chamber relative to the upper portion
  • Figure 11 is a partially cut away perspective view showing the manner of flow through the apparatus with a typical low flow rain event
  • Figure 12 is a top plan view of a fifth embodiment
  • Figure 13 is a cross sectional view through XIII-XIII of Figure 12.
  • FIG. 14 is cutaway perspective view of the fifth embodiment of the invention. Similar reference characters indicate corresponding parts throughout the several views of the drawings.
  • both stormwater separation apparatuses illustrated in Figures 1 through 7 comprise an inlet (1) that receives water from a stormwater conduit (2).
  • the inlet leads through an inlet aperture (3) into a separation chamber (4).
  • a filtration chamber (5) is positioned below the separation chamber.
  • a riser (6) leads from the filtration chamber to an outlet (7) which connects with a stormwater receiving conduit (8).
  • One or more filtration baskets (9) are positioned in the filtration chamber and are spaced apart from a wall (10) defining the filtration chamber.
  • a riser aperture (11) leads from the filtration chamber to the riser, and a riser headwall (12) is spaced below the inlet (1).
  • An overflow (13) communicates directly between the inlet and the outlet, and a weir (14) is positioned to prevent flow through the overflow unless a predetermined level of stormwater is exceeded.
  • a single, vertically aligned concrete pipe forms a vertical wall (10) for both the separation chamber and the filtration chamber, although it will be understood that the vertical wall might be made in segments.
  • the effect of this is that both separation and filtration chambers form substantially one treatment chamber having substantially constant horizontal cross sectional dimensions.
  • the bottom of the treatment chamber is defined by a concrete base (15) and the top is formed by an openable lid (16), which lid might be of a concrete, metal, plastics or other construction which might be lifted by hand or mechanical means depending on its weight. It can be seen that one advantage of this arrangement is the ease of construction of the treatment chamber, and ease of access to the filtration baskets, which need cleaning periodically.
  • the concrete pipe has a diameter of 1950 mm, and is approximately 3590 mm in height, with the filtration chamber extending up to approximately 2130, taken from the bottom of the base.
  • An elongate box shaped chamber (17) comprising a base (18), two elongate side walls (19, 20), a top (21) and ends (22, 23), is positioned in line with stormwater conduits (2, 8), and is offset with respect to an upper portion of the treatment chamber.
  • the box shaped chamber has defined therein the inlet and the outlet.
  • End (22) includes therein a circular aperture into which stormwater conduit (2), in this case a circular pipe with a diameter 750 mm, can be sealing fitted.
  • the weir (14) extends across the inlet portion of the box shaped chamber from end (22) through to a far portion of the concrete pipe, and ends at a distal portion of the inlet aperture (3) formed in the concrete pipe.
  • the generally triangle shaped portion of the box shaped chamber comprising end (22), weir (14) and proximal wall (20) might be regarded as the inlet (1) of the apparatus, because that is where flow of water is directed from stormwater conduit (2), other than when high flow events occur.
  • the weir has a height of 540 mm, which falls short of the 750 mm height of the stormwater conduit (2).
  • the inlet aperture (3) has a linear length of approximately 1400 mm and a height of the aperture defined by an inlet headwall (23) extending level with the top of the weir.
  • the inlet aperture is cut out of the vertical pipe, or more preferably the vertical pipe might be moulded with the inlet aperture already formed therein. It can be seen that the separation chamber extends considerably above the inlet headwall (23).
  • a region immediately downstream of the weir (14) in the box shaped chamber might be considered an overflow (13). Should the flow of stormwater in the inlet be such that the level is raised above the weir, it will then spill over the weir into the overflow and directly to the outlet and the stormwater receiving conduit (8). It might be possible to arrange the stormwater separation apparatus in such a way that a weir is not needed, so that hydraulic pressure emanating from the outlet is such as to provide a hydraulic weir, up to a certain flow rate through the separation apparatus.
  • the outlet includes an outlet aperture (25) formed through the base (18) of the box shaped chamber (17) whereby to receive treated water flowing upward through the riser.
  • An exit chamber (26) of smaller dimension than the box shaped chamber constitutes a final portion of the outlet, and is again formed of concrete.
  • the receiving stormwater conduit (8) is sealingly connected with the exit chamber.
  • the filtration chamber leads off to the riser (6) via the riser aperture (11).
  • the constructional features of the riser can best be seen in figures 3 and 2.
  • the riser is constructed of concrete to form a vertical box shaped structure, that readily fits under the profile of the elongate box shaped structure (17) and that is positioned adjacent a lower portion of the treatment chamber.
  • the riser extends below the lowest level of the filtration chamber to form a sump (27), whereby heavier particles that have passed through the basket can settle.
  • a downstream junction between the riser and the outlet may have a bevel or be curved so that restriction to flow is reduced.
  • a separate riser lid (28) can be provided which gives direct access through the outlet aperture to the sump whereby a vacuum cleaner tube can be inserted to remove collected debris once it reaches an undesirable height.
  • the separate riser lid can provide access to remove a collection container from the sump, where one is provided.
  • FIG. 4 A rigid uppermost frame (30) encircles an open uppermost end of the basket, and is constructed of tubular stainless steel.
  • Vertical frame members (31) extend downwardly from the uppermost frame to join with a lowermost frame member (32), to thereby form the basic frame of the basket.
  • Ribs (33) will also generally be provided.
  • the basket frame being made generally of steel, will be understood to be of a rigid structure.
  • a flap (34) is hinged to the lowermost frame with a catch provided opposite the hinges so as to permit the flap to open, or alternatively to be locked into place against the lowermost frame member of the basket, however, details of the hinging are not shown in the illustrations.
  • the basket frame is lined with a suitable filter material.
  • the illustrated embodiments are lined with expanded metal mesh with pore size of about 1 mm by 3 mm. As with all expanded metal mesh, the pores of any sheet are all angled toward the plane of the mesh in one direction. In the present embodiment, the pores of the sheets of mesh on the sides of the baskets are all positioned facing downwardly, to avoid any adverse clogging of the filter.
  • the sturdiness of the uppermost frame of the basket allows the ready mechanical handling of the baskets, so that even should there be significant weight in the full baskets, there will be minimal distortion of the basket, to facilitate lifting through the full length of the treatment chamber.
  • the baskets are spaced apart from the walls of the filtration chamber. Where a single basket is used it will be seen that there is a peripheral gap (35) between the outside surface of the filter lining the basket and the filtration chamber wall (10). Similarly it will be seen that there is a bottom gap (36) between the bottom of the basket and the base (15) of the filtration chamber. Where multiple baskets are used as can be seen in figure 4 the baskets are each spaced apart as well, to form inter-basket gaps (37). Basket locating means are provided to ensure that the baskets can readily be positioned in place.
  • the basket locating means is in the form of a basket supporting annulus (38) (best seen in Figure 7) fixed to an upper part of the filtration chamber wall, hooks (39) of other engaging means might be provided on the basket to catch onto the basket supporting annulus.
  • the basket supporting annulus provides an advantageous means of supporting the basket in the present case, because it also acts as a barrier to passage of debris between the periphery of the basket and the filtration chamber wall, thereby enhancing the efficiency of the filtration process. Where other basket support means are provided, it might be desirable to provide an annulus or other barrier to the passage of debris between the basket and the filtration chamber wall.
  • basket support means could be provided by at least three small pedestals extending upwardly from the floor, having a base portion so that the lowermost portion of the basket could rest thereon, and vertically extending portions, to locate a lowermost periphery of the basket.
  • the provision of gaps adjacent the filtering surfaces facilitates the filtering process whereby the flow rate across the filter is greatly enhanced.
  • the flow through stormwater conduit (2) is determined by the volume of water needed to pass through a pipe of cross sectional diameter of 750 mm, whereas the flow rate across the filter is reduced many fold, the rate being dictated by the total area of the filters earned by the one or more baskets.
  • the uppermost portion of the illustrated filtration basket is positioned so as to be spaced below the lowermost edge of the inlet.
  • water must drop below the inlet level before being filtered, this then prevents clogging of the upper portion of the filter with oils and other floatable once a rain event has subsided. Whilst this is desirable it is not essential.
  • a boom means which in this case takes the form of vertically adjustable splitter plates (40). These are supported on a splitter plate shaft (41) and welded to a splitter plate collar (42) which can slide between at least two positions on the splitter plate shaft. In use for a rain event the splitter plates will be located so that an upper edge (43) lies adjacent the uppermost frame of the baskets. The splitter plates thus act as a barrier for passage of debris between the multiple baskets. When it comes time to empty the basket the splitter plates can be raised so that they intersect the surface of the water in the filtration chamber, and act as booms, to divide the surface into, in this case, four quadrants.
  • any floatable within a respective quadrant will either collect in the basket, in the case of solid floatables, or in the case of oils, will coat the basket or debris therein, and a majority will be removed.
  • the basket is emptied, cleaned and then returned the respective quadrant will remain relatively clean, and the floatable in the remaining three quadrants will be localised therein. The remaining three quadrants can be cleaned in like fashion.
  • a second illustrated embodiment is illustrated in figures 5, 6, and 7.
  • the treatment chamber comprising the separation chamber and the filtration chamber is substantially the same as in the first illustrated embodiment.
  • the inlet and outlet and riser are constructed in a different fashion but function in a similar way to the first embodiment. These are provided by two split pipes (45, 46) comprising an inlet chamber and the outlet chamber respectively.
  • a floor (47) is provided substantially level with the stormwater conduits (2) and (8), except at outlet aperture (25).
  • the riser is defined within the outlet chamber pipe (46) exiting the filtration chamber through a riser aperture similar to that of the first embodiment. This embodiment has no sump.
  • the sinkable debris will fall into the baskets, and the majority will be captured. In the case where the debris is small enough, a proportion will pass through the pores of the filters. Some will settle onto or in between the larger sinkable debris. Where the smaller debris is denser it will fall to the base of the filtration chamber and swept into the sump where one exists, or if is suspended, it may be earned out through the receiving stormwater conduit (8).
  • FIG. 8 to 14 show a stormwater filtration screening apparatus which comprises an upper portion (101) and a filtration chamber (102) separated from one another by a floor (103).
  • a storm water inlet (104) leads into an inlet portion (105) of the screening apparatus.
  • a stormwater outlet (106) directs water away from an outlet portion (107) of the apparatus.
  • a filtering portion (108) of the apparatus includes a separation chamber (109) in the upper portion and filtration apertures (110a, 110b, 110c and 1 lOd) extending through the floor (103) to allow for flow of stormwater from the separation chamber to the filtration chamber (102).
  • a filter (111) is held within the filtering aperture so as to filter water passing therethrough.
  • An overflow (112) communicates directly between the inlet portion and the outlet portion.
  • the outlet portion (107) is located within a downstream end of the upper portion.
  • a rising aperture (115) extends through the floor within the overflow (112) for filtered stormwater to rise up from the filtration chamber (102) to the overflow and from there past the outlet portion and out through the stormwater outlet (106).
  • the construction of the apparatus is largely of precast concrete components of a suitable density.
  • the filtration chamber (102) is substantially rectangular in plan view and is defined within a base (120), four side walls, two of which are shown at (121, 122) and the upper limit of the filtration chamber defined by a lower surface of the floor (103). Additionally a baffle (123) is positioned adjacent to the outlet aperture (115) to retain floating debris.
  • the floor is substantially flat and is constructed as a unitary concrete structure.
  • the upper portion (101) extends upwardly from the floor and is defined within four external side walls (125, 126, 127, and 128).
  • the stormwater inlet (104) is fitted into the upstream wall (125), and the stormwater outlet (106) is fitted into the downstream wall (127).
  • a removable flat plate lid (140) rests on the four external walls to enclose the apparatus.
  • the separation chamber (109) is elongate in the direction of flow of water through the inlet stormwater pipe (104).
  • a filtration inlet channel (130) extends adjacent the separation chamber and is separated therefrom by a filtration inlet channel wall (131).
  • the separation chamber is thus defined within internal walls (132, 133 and 134) and the filtration inlet channel wall (131).
  • the filtration inlet channel wall (131) does not extend as high up as the lid (140) of the apparatus but is considerably lower, as perhaps best seen in figure 3, and thus acts as a weir.
  • the filtration inlet channel as shown can be seen to be of similar dimensions to the stormwater inlet.
  • the filters (111) are not flat across the filtration apertures (110) but rather are shown as columnar in overall shape thus having a vertical height.
  • the filters are made of a mesh of a suitable pore size and are supported over the filtration apertures (110).
  • the filter shown in figure 3 includes an upper mesh portion (135) and a solid lower portion (136).
  • the solid lower portion takes the shape of a cup which has no apertures therethrough, and facilitates the collection of silt in the filter which otherwise would allow it to pass through. It will be understood that the shape of the filter can vary to suit the requirements of the facility in which it is received.
  • the size of the filter also need not necessarily be commensurate with the size of the filtration aperture.
  • the filter may be fitted to the underside of the floor and extend under the separation chamber (109) as well as under the filtration inlet channel (130).
  • the columnar shape need not be circular or elliptical, it may be of any shape able to collect debris and could be, for example, rectangular and the filtration apertures can also be rectangular.
  • the mesh size can vary to suit the application, and the mesh sizes of the different filters of any one installation can vary.
  • the overflow (112) comprises a channel bounded by the floor (103), external wall (128) and internal wall (133).
  • Internal wall (133) unlike filtration inlet channel wall (131) extends fully up to the lid (140) and thus the overflow is fully separated from the filtration inlet channel downstream of the inlet portion of the apparatus.
  • the overflow extends essentially as a straight channel from the inlet portion (105) of the apparatus through to the outlet portion (107) of the apparatus, and thus communicates directly between the inlet portion and the outlet portion.
  • the filtration chamber has a riser portion spaced away from the filters and from which water exits through an outlet aperture (115) which passes through the floor in the overflow and in general use, water rises through the rising aperture (115) from the filtration chamber to the overflow, because the water level in the separation chamber is generally higher than that in the inlet portion of the apparatus.
  • the higher level of water within the overflow during most rain events provides control over the flow path of the stormwater so that the higher level of water within the overflow directs water into the filtration inlet channel (130) in preference to the overflow.
  • the rising aperture may be positioned substantially anywhere along the overflow (112) or the outlet portion, and including downstream of the stormwater outlet (106) provided that water passing through the rising aperture rises above the level of water within the inlet portion (115) of the apparatus.
  • the rising aperture is elongate extending along the overflow, and positioned approximately midway along the overflow channel.
  • a second position can be seen in Figure 9 where the rising aperture is position at the upstream end of the overflow.
  • a low outlet aperture weir (145) is positioned around a periphery of the rising aperture in the second embodiment to prevent silt from being deposited into the rising aperture.
  • the lid (140) may be made of concrete construction, as the rest of the walls are, and rests on a ledge (150) of the external walls, and directly on internal walls (132, 133 and 134). A suitable hook or other device is preferably provided for ease of removal of the lid.
  • the apparatus may be used in-line, as with the illustrated embodiments, and in the illustrated embodiments the stormwater inlet (104) and storm water outlet (106) at are substantially the same level, facilitating the positioning of the apparatus into the flow path of existing stormwater pipes. For end-of line applications or for fitting to new in- line stormwater systems it may be desired to have the outlet at a lower level than the inlet, and perhaps leading out from the filtration chamber.
  • Figures 8 and 9 indicate that the construction of apparatus is modular, so that the apparatus is provided in four sections, (151, 152, 153 and 154), separated as indicated by broken lines shown at (155, 156, and 157).
  • Two end sections are provided.
  • the upstream section (151) includes the inlet portion (105), and part of the separation chamber (109), the filtration inlet channel (130) and the overflow (112).
  • the downstream end section includes the outlet portion (107), a downstream portion of the separation chamber (109), and the overflow (112).
  • the lid may also be provided in similar sections, and lifted separately for cleaning. Thus for cleaning the lid is lifted, the filters removed and emptied, or simply emptied using a suction device, and the filtiation chamber is emptied using a suction device. Generally the basket (110a) will be inspected first because this is the basket that would be filled up first, and if this basket still has sufficient capacity left cleaning might not need to be effected.
  • the overall dimensions of the apparatus will also vaiy depending on the size of the stormwater pipe.
  • the stormwater pipe has a diameter of 300 mm and the arrangement has a width of approximately 1 metre, and a length of approximately 4 meters.
  • the general flow path of stormwater can be seen in Figure 1 by the arrows (160, 161, 162, 163, and 164).
  • Water enters (160) the inlet portion from the stormwater inlet, it is diverted (161) into the separation chamber which is offset from the filtration inlet channel and then enters (161) filtration aperture (110a). Where the flow is greater or filtration aperture (110a) is blocked the flow proceeds (162) to the further filtration apertures and from there to the filtration chamber.
  • the filtered stormwater exits (163) from the filtration chamber and is directed into the overflow in the downstream direction and then travels (164) through the outlet portion through to the stormwater outlet.
  • the width of the separation chamber (19) is much wider than the filtration inlet channel and the stormwater inlet and the flow thus slows considerably, it is believed that as a result of this that the level of the stormwater within the separation chamber is higher than within the filtration inlet channel (130) and the inlet portion (105) of the arrangement. This level is reflected in the level of water in the overflow (112) as it passes through the outlet aperture (115) and consequently stormwater coming in from the stormwater inlet is inhibited from entering the overflow. During periods of higher flow, stormwater spills over the filtration inlet channel wall (131) directly to filtration apertures (110b) and (110c) thereby short cutting the route taken by the stormwater.
  • the water passing through the inlet channel (130) is redirected on entry into the separation chamber (109), and has a tendency to form a swirl encompassing the upstream aperture (110a) or two upstream apertures (110a, 110b) depending on how far the inlet channel wall (131) extends.
  • the fifth embodiment shown in figures 12 to 14 has a somewhat different construction but has a very similar action. As can be seen this embodiment has a component based on a cylindrical construction instead of the rectangular construction of the third and fourth embodiments.
  • the filtration chamber (102) is thus substantially cylindrical in plan view and is defined within a base (120) and side wall (200) and the upper limit of the filtration chamber is defined by a lower surface of the floor (103).
  • the floor is substantially flat and is constructed as a unitary concrete structure.
  • the upper portion (101) extends upwardly from the floor and is defined within an upper cylindrical external side wall (201).
  • the stormwater inlet (104) is fitted through an upstream part of the upper wall (201) and the stormwater outlet (106) is fitted through a downstream part of the upper external wall.
  • a removable flat plate lid rests on the upper wall to enclose the apparatus.
  • a internal upper cylindrical wall (202) is positioned eccentrically of and inside the external upper cylindrical wall (201) and rests on the floor (103) or can extend to the lower floor (120) with openings therethrough to allow egress of water.
  • Stormwater inlet (104) leads to inlet portion (105) and an inlet aperture (204) is formed through the internal wall (202) to receive stormwater flowing therefrom.
  • a weir (205) may be formed on one side of the inlet portion to keep water up to a predetermined level before overflow is permitted.
  • Overflow (112) is formed between the internal wall (202) and the external upper wall (101) as a result of the eccentric positioning of one with respect to the other, and leads to an outlet portion (107) which leads to the stormwater outlet pipe (106) which carries water away from the apparatus.
  • the separation chamber (109) is cylindrical with the inlet aperture being offset from the centre of the separation chamber, and it will be readily appreciated that ingress of water leads to a swirling water flow with the greatest flow being at the periphery of the separation chamber.
  • the illustrated embodiment includes five filtration apertures (210a, 210b, 210c, 210d and 210e). It can be seen that these are not positioned symmetrically around a centre (211) of the separation chamber but rather are offset away from an inlet side of the separation chamber. It may alternatively be desired to have the filter apertures disposed symmetrically, preferably spaced apart from the periphery of the separation chamber.
  • filter aperture (210e) partially bypasses (210a) and depending on the velocity of flow will progressively contact enter or pass over subsequent filter apertures (210b, 210c, 210d, 210 e).
  • the filter apertures each takes up a unique radial position relative to the periphery of the separation chamber ranging from filter aperture (210d) which is positioned up against the periphery, through to (210a) which is closest to but not overlapping the centre (211) of the separation chamber. This will therefore facilitate the collection of a range of debris that settle of various distances from the centre of the separation chamber.
  • the first filtration aperture (210a) being most distant from the internal wall defining the periphery of the separation chamber means that whilst it collects some of the initial debris it does not collect all, and therefore is less likely to present a blockage which backfills to the inlet pipe. Additionally the greatest velocity of water flow is around the periphery of the separation chamber, and the position of the first filter aperture therefore minimises the prospects of backfill because a high velocity channel of stormwater will tend to clear blockages or at least maintain a passage of stormwater between the first aperture and the periphery of the separation chamber open which downstream filter aperture can accommodate.
  • a lid support member (215) in the form of a column is positioned to give the lid extra support.
  • the filters (111) of this embodiment are similar to those of the third and fourth embodiments, and the filtration chamber operates in a similar manner, and so will not be described in further detail.
  • the outlet aperture (115) is positioned in the outlet portion of the upper portion of the apparatus, and its function is similar to that of the third and fourth embodiment, in so far as it assists with biasing flow at the inlet to enter the separation chamber.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • 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)
  • Farming Of Fish And Shellfish (AREA)

Abstract

Cette invention concerne un séparateur de pollution pour les eaux d'orage ainsi qu'un appareil à filtre que l'on monte en ligne dans le conduit de récupération des eaux d'orage. Cet appareil comprend une entrée (1) de réception des eaux d'orage qui mène par un orifice d'entrée (3) à une chambre de séparation (4) elle-même menant à une chambre de filtration (5) qui est placée en dessous de l'orifice d'entrée (3). Une colonne montante (6) mène de la chambre de filtration (5) à une sortie (7) qui est connectée en retour au conduit des eaux d'orage (3). L'orifice d'entrée est connecté tangentiellement à la chambre de séparation (4) de manière à créer, lors de l'utilisation, une action de tourbillon dans celle-ci (4) sous l'effet du débit des eaux d'orage. La chambre de séparation (4) est placée verticalement au dessus de la chambre de filtration (5), cette dernière (5) renfermant un ou plusieurs paniers de filtration (9) qui vont recevoir globalement tout le débit des eaux d'orage depuis la chambre de séparation (4). Les paniers (9) sont séparés les uns des autres par une cloison (10) définissant la périphérie de la chambre de filtration (5). Un trop-plein assure une communication directe entre l'entrée et la sortie, tandis qu'un barrage (14) placé dans le trop-plein empêche tout débit à travers ce dernier à moins qu'un niveau prédéterminé d'eaux d'orage ne soit dépassé.
PCT/AU1998/000967 1997-11-21 1998-11-20 Separateur de pollution et appareil de filtration WO1999027204A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US09/554,300 US6241881B1 (en) 1997-11-21 1998-11-20 Pollution separator and filtration apparatus
AU13267/99A AU733772B2 (en) 1997-11-21 1998-11-20 Pollution separator and filtration apparatus
DE19882826T DE19882826T1 (de) 1997-11-21 1998-11-20 Verunreinigungs-Separator und Filtrationsvorrichtung
NZ504539A NZ504539A (en) 1997-11-21 1998-11-20 Swirl chamber pollution separator and filtration apparatus for stormwater
GB0011622A GB2346818B (en) 1997-11-21 1998-11-20 Pollution separator and filtration apparatus

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPP0481A AUPP048197A0 (en) 1997-11-21 1997-11-21 Stormwater filtration apparatus
AUPP0481 1997-11-21
AUPP5616 1998-09-01
AUPP5616A AUPP561698A0 (en) 1998-09-01 1998-09-01 Pollution separator

Publications (1)

Publication Number Publication Date
WO1999027204A1 true WO1999027204A1 (fr) 1999-06-03

Family

ID=25645658

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1998/000967 WO1999027204A1 (fr) 1997-11-21 1998-11-20 Separateur de pollution et appareil de filtration

Country Status (4)

Country Link
DE (1) DE19882826T1 (fr)
GB (1) GB2346818B (fr)
NZ (1) NZ504539A (fr)
WO (1) WO1999027204A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2360713A (en) * 2000-03-30 2001-10-03 Barr & Wray Ltd Runoff water filtration apparatus
BE1013632A3 (nl) * 2000-07-31 2002-05-07 Verhulst Frank Werkwijze en toestel voor het filteren van water.
US6413015B1 (en) * 2001-01-08 2002-07-02 Keith Poirier Beaver controlling culvert attachment
US6478954B1 (en) * 2001-06-06 2002-11-12 Fresh Creek Technologies, Inc. Debris collecting apparatus
KR100408940B1 (ko) * 2000-09-01 2003-12-11 주식회사 환경시설관리공사 자연정화식 맨홀
CN102392487A (zh) * 2011-11-18 2012-03-28 江苏大学 一种雨污水管道污染物分离装置
WO2016004456A1 (fr) * 2014-07-11 2016-01-14 Aquavest Pty Limited Appareil destiné à filtrer de l'eau polluée
CN105424102A (zh) * 2016-01-05 2016-03-23 北京建筑大学 一种雨水口流量测量装置
CN106861281A (zh) * 2015-12-10 2017-06-20 俞扬池 一种雨水净化设备
CN110644570A (zh) * 2019-10-26 2020-01-03 江苏澳洋生态园林股份有限公司 应用于雨水收集的小型泥-水-垃圾分离装置
CN111576580A (zh) * 2019-02-19 2020-08-25 海德鲁国际有限公司 一种排水系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013100694B4 (de) 2013-01-24 2018-03-08 Müller Gerätebau GmbH Verfahren und Vorrichtung zur Aufbereitung einer von Zusatzstoffen verunreinigten Basisflüssikeit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4125419A1 (de) * 1991-01-18 1992-08-20 Vogelsberger Silo Und Behaelte Regenueberlauf und regenueberlaufbecken als regenwasserbehandlungs- und -entlastungsanlage, sowie siebanordnungen fuer regenwasserbehandlung- und -entlastungsanlagen
WO1995035145A1 (fr) * 1994-06-17 1995-12-28 Paul Blanche Appareil et procede pour separer des matieres solides d'un flux de liquide ou de gaz
AU2725395A (en) * 1994-07-28 1996-02-08 Leslie Richards Waste treatment apparatus
DE29709859U1 (de) * 1997-06-06 1997-10-23 Sperl, Helmut, 48341 Altenberge Reinigungsanordnung für die Abwasserkanalisation
AU3523797A (en) * 1996-08-22 1998-02-26 Vortechnics, Inc. Method and apparatus for separating floating and non-floating particulate from rainwater drainage

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10152881A (ja) * 1996-11-21 1998-06-09 Sekisui Chem Co Ltd 雨水浸透装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4125419A1 (de) * 1991-01-18 1992-08-20 Vogelsberger Silo Und Behaelte Regenueberlauf und regenueberlaufbecken als regenwasserbehandlungs- und -entlastungsanlage, sowie siebanordnungen fuer regenwasserbehandlung- und -entlastungsanlagen
WO1995035145A1 (fr) * 1994-06-17 1995-12-28 Paul Blanche Appareil et procede pour separer des matieres solides d'un flux de liquide ou de gaz
AU2725395A (en) * 1994-07-28 1996-02-08 Leslie Richards Waste treatment apparatus
AU3523797A (en) * 1996-08-22 1998-02-26 Vortechnics, Inc. Method and apparatus for separating floating and non-floating particulate from rainwater drainage
DE29709859U1 (de) * 1997-06-06 1997-10-23 Sperl, Helmut, 48341 Altenberge Reinigungsanordnung für die Abwasserkanalisation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DERWENT ABSTRACT, Accession No. 98-381587/33, Class Q42; & JP 10152881 A (SEKISUI CHEM IND CO. LTD) 9 June 1998. *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2360713A (en) * 2000-03-30 2001-10-03 Barr & Wray Ltd Runoff water filtration apparatus
GB2360713B (en) * 2000-03-30 2003-08-13 Barr & Wray Ltd Run off water treatment and filtration device
BE1013632A3 (nl) * 2000-07-31 2002-05-07 Verhulst Frank Werkwijze en toestel voor het filteren van water.
KR100408940B1 (ko) * 2000-09-01 2003-12-11 주식회사 환경시설관리공사 자연정화식 맨홀
US6413015B1 (en) * 2001-01-08 2002-07-02 Keith Poirier Beaver controlling culvert attachment
US6478954B1 (en) * 2001-06-06 2002-11-12 Fresh Creek Technologies, Inc. Debris collecting apparatus
CN102392487A (zh) * 2011-11-18 2012-03-28 江苏大学 一种雨污水管道污染物分离装置
WO2016004456A1 (fr) * 2014-07-11 2016-01-14 Aquavest Pty Limited Appareil destiné à filtrer de l'eau polluée
CN106861281A (zh) * 2015-12-10 2017-06-20 俞扬池 一种雨水净化设备
CN105424102A (zh) * 2016-01-05 2016-03-23 北京建筑大学 一种雨水口流量测量装置
CN105424102B (zh) * 2016-01-05 2020-07-17 北京建筑大学 一种雨水口流量测量装置
CN111576580A (zh) * 2019-02-19 2020-08-25 海德鲁国际有限公司 一种排水系统
CN111576580B (zh) * 2019-02-19 2021-08-10 海德鲁国际有限公司 一种排水系统
CN110644570A (zh) * 2019-10-26 2020-01-03 江苏澳洋生态园林股份有限公司 应用于雨水收集的小型泥-水-垃圾分离装置

Also Published As

Publication number Publication date
GB2346818B (en) 2001-09-05
NZ504539A (en) 2001-10-26
GB0011622D0 (en) 2000-07-05
DE19882826T1 (de) 2001-03-22
GB2346818A (en) 2000-08-23

Similar Documents

Publication Publication Date Title
US6241881B1 (en) Pollution separator and filtration apparatus
US7297266B2 (en) Apparatus for separating particulates from a fluid stream
EP0688236B1 (fr) Appareil de separation de matieres solides a partir d'un liquide en ecoulement
US7001527B2 (en) Stormwater treatment apparatus and method
US6524473B2 (en) Gravitational separator and drainwater treatment system for use in a horizontal passageway
EP2755736B1 (fr) Appareil, système et procédés de traitement de fluide
CA2621378C (fr) Appareil servant a separer des solides de liquides en ecoulement
US7182874B2 (en) Storm water treatment apparatus employing dual vortex separators
EP0825304B1 (fr) Dispositif pour séparer des matières particulaires flottantes et non-flottantes d'eau pluviale
EP2744948B1 (fr) Séparateur hydrodynamique de courant fluidique comportant une dérivation à haut débit
CA3085711C (fr) Separateurs hydrodynamiques, ensembles et procedes de traitement d'eaux pluviales
WO1999027204A1 (fr) Separateur de pollution et appareil de filtration
US20080164190A1 (en) Curbside gross pollution trap
KR100904287B1 (ko) 하수 월류수 처리장치
JP2003533353A (ja) 固液分離装置
WO1999045214A1 (fr) Ensemble de filtre
AU2005316557B2 (en) Apparatus for separating particulates from a fluid stream
AU733772B2 (en) Pollution separator and filtration apparatus
AU747765B2 (en) A filter assembly
AU2007234551A1 (en) Kerbside Gross Pollution Trap

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 13267/99

Country of ref document: AU

WWE Wipo information: entry into national phase

Ref document number: 09554300

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 504539

Country of ref document: NZ

ENP Entry into the national phase

Ref document number: 200011622

Country of ref document: GB

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: KR

RET De translation (de og part 6b)

Ref document number: 19882826

Country of ref document: DE

Date of ref document: 20010322

WWE Wipo information: entry into national phase

Ref document number: 19882826

Country of ref document: DE

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA

WWG Wipo information: grant in national office

Ref document number: 13267/99

Country of ref document: AU