WO2017149314A1 - Filtering apparatus for a grey water recycling system - Google Patents

Filtering apparatus for a grey water recycling system Download PDF

Info

Publication number
WO2017149314A1
WO2017149314A1 PCT/GB2017/050566 GB2017050566W WO2017149314A1 WO 2017149314 A1 WO2017149314 A1 WO 2017149314A1 GB 2017050566 W GB2017050566 W GB 2017050566W WO 2017149314 A1 WO2017149314 A1 WO 2017149314A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
grey water
housing
water outlet
filter apparatus
Prior art date
Application number
PCT/GB2017/050566
Other languages
French (fr)
Inventor
William John Brown Hendrie
Original Assignee
Avon Water Systems Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Avon Water Systems Limited filed Critical Avon Water Systems Limited
Priority to EP17715249.3A priority Critical patent/EP3423412A1/en
Publication of WO2017149314A1 publication Critical patent/WO2017149314A1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C02F1/004—Processes for the treatment of water whereby the filtration technique is of importance using large scale industrial sized filters
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B1/00—Methods or layout of installations for water supply
    • E03B1/04—Methods or layout of installations for water supply for domestic or like local supply
    • E03B1/041—Greywater supply systems
    • E03B1/042—Details thereof, e.g. valves or pumps
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/002—Grey water, e.g. from clothes washers, showers or dishwashers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B1/00—Methods or layout of installations for water supply
    • E03B1/04—Methods or layout of installations for water supply for domestic or like local supply
    • E03B1/041—Greywater supply systems
    • E03B2001/045—Greywater supply systems using household water

Definitions

  • This invention relates to a filter housing and particularly, but not exclusively, a filter housing for a grey water recycling system.
  • a filter housing for a grey water recycling system comprising:
  • the filter receiving portion being located between the grey water inlet and the first grey water outlet
  • housing is configured such that, in use, grey water may flow from the inlet through the filter receiving portion to the first grey water outlet, or from the inlet directly to the second grey water outlet.
  • a filter apparatus for a grey water recycling system comprising:
  • the housing comprising:
  • the filter being located between the grey water inlet and the first grey water outlet,
  • housing is configured such that, in use, grey water may flow from the inlet through the filter to the first grey water outlet, or from the inlet directly to the second grey water outlet.
  • the filter housing or filter apparatus may be suitable for use with a grey water filtering system. That is the filter housing or filter apparatus may be suitable for use with a grey water recycling system or a grey water filtering system.
  • the housing may be configured such that, in use, grey water may initially flow from the inlet through the filter receiving portion/filter to the first grey water outlet and then from the inlet to the second grey water outlet.
  • the housing may be configured such that, in use, grey water may start to flow from the inlet to the second grey water outlet once grey water can no longer flow through the filter receiving portion/filter to the first grey water outlet.
  • the housing may be generally cylindrical in shape.
  • the housing may have a longitudinal axis.
  • the housing may have an upper portion and a lower portion.
  • the housing may have a removable lid member.
  • the lid member may be detachably removable from the housing.
  • the lid member may include a seal, such that the lid is in a sealed engagement with the housing.
  • the housing and the lid member may be configured to allow access to the inside of the housing when the lid member is removed.
  • the housing may have a removable base member.
  • the base member may be detachably removable from the housing.
  • the base member may include a seal, such that the base is in a sealed engagement with the housing.
  • the housing and the base member may be configured to allow access to the inside of the housing when the base member is removed.
  • the housing may be made from a plastics material.
  • the housing may be made from acrylonitrile butadiene styrene (ABS).
  • ABS acrylonitrile butadiene styrene
  • the grey water inlet may be configured to be connectable to a source of grey water.
  • the source of grey water may be waste water from a domestic shower, bath, a swimming pool, health club or gymnasium facilities, hand basin, or the like.
  • the grey water inlet may be located towards the upper portion of the housing.
  • the grey water inlet may be located on a side wall portion of the housing.
  • the grey water inlet may substantially cylindrical in shape.
  • the grey water inlet may be located above the filter receiving portion/filter.
  • the first grey water outlet may be configured to be connectable to a grey water storage tank.
  • the grey water storage tank may be a filtered grey water storage tank.
  • the first grey water outlet may be located towards the lower portion of the housing.
  • the first grey water outlet may be located on a side wall portion of the housing.
  • the first grey water outlet may be substantially cylindrical in shape.
  • the first grey water outlet may be located below the filter receiving portion/filter.
  • the first grey water outlet may therefore be located below the grey water inlet.
  • the first grey water outlet may include a valve that may be selectively operable to allow or prevent grey water passing therethrough.
  • the second grey water outlet may be configured to be connectable to a drainage system.
  • the second grey water outlet may be configured to allow grey water entering the housing from the grey water inlet to exit the housing without passing through the filter receiving portion/filter.
  • the second grey water outlet may be located towards the upper portion of the housing.
  • the second grey water outlet may be located on a side wall portion of the housing.
  • the second grey water outlet may be substantially cylindrical in shape.
  • the second grey water outlet may be located above the filter receiving portion/filter.
  • the grey water inlet and the second grey water outlet may be located at substantially the same height above the filter receiving portion/filter. That is the grey water inlet and the second grey water outlet may be located at the same height position beneath the lid member.
  • the grey water inlet and the second grey water outlet may be substantially in alignment with one another.
  • the grey water inlet and the second grey water outlet may be substantially in axial alignment with one another.
  • the housing may further comprise a third grey water outlet.
  • the third grey water outlet may be configured to be connectable to a drainage system.
  • the third grey water outlet may be associated with a control valve.
  • the control valve being operable to allow grey water within the housing to flow out of the third grey water outlet to the drainage system.
  • the control valve may be a manually-operated valve.
  • the third grey water outlet may be located towards the lower portion of the housing.
  • the third grey water outlet may be located on the base member of the housing. That is, the third grey water outlet passes through the base member.
  • the third grey water outlet may be substantially cylindrical in shape.
  • the third grey water outlet may be located below the filter receiving portion/filter. The third grey water outlet may therefore be located below the grey water inlet.
  • the filter receiving portion may be configured to receive and support at least one filter element therein.
  • the filter receiving portion may include a first filter support portion.
  • the first filter support portion may be located between the grey water inlet and the first grey water outlet, such that a filter element may be located between the grey water inlet and the first grey water outlet.
  • the first filter support portion may be one or more protrusions that extend from the side wall of the housing.
  • the first filter support portion may be a flange portion that circumscribes the inner wall of the housing, such that a filter element may be supported by a top surface of the flange.
  • the filter receiving portion may include a second filter support portion.
  • the second filter support portion may be formed with the first filter support portion.
  • the second filter support portion may be located between the grey water inlet and the first grey water outlet.
  • the second filter support portion may be configured to suspend a filter element therefrom.
  • the second filter support portion may be one or more protrusions that extend from the side wall of the housing.
  • the second filter support portion may be a substantially U-shaped channel portion that circumscribes the inner wall of the housing, such that a filter element may be suspended from the channel portion.
  • the filter element may include a correspondingly-shaped channel engagement portion that allows the filter element to engage with the second filter support portion and be suspended therefrom.
  • the filter receiving portion may therefore provide two filter element support portions.
  • the filter receiving portion may be configured to receive and support at least one disinfectant element or member therein.
  • the at least one disinfectant element may be associated and/or connected to the one or more filter elements.
  • the filter element may be a single stage filter.
  • the filter element may include a single filter.
  • the filter may be a two stage filter.
  • the filter element may include two filters.
  • the filter may be a multi-stage filter.
  • the filter element may include more than two filters.
  • the filter element may be located between the grey water inlet and the first grey water outlet.
  • the first filter may be a substantially disc-shaped filter element.
  • the first filter may be operable to filter particles larger than approximately 100pm.
  • the first filter may be made from a Scotch BriteTM material.
  • the first filter may be a substantially solid block of filter material.
  • the first filter may be configured to provide an interference fit with the internal surface of the housing.
  • the first filter element may be a coil filter.
  • the first filter may be a substantially spiral-shaped filter element.
  • the first filter may be a substantially planar member.
  • the first filter may be a substantially planar member made from a flexible material. In this arrangement, the first filter may be rolled to form a substantially spiral-shaped filter element.
  • the first filter may be located between the grey water inlet and the first grey water outlet.
  • the first filter may be located below the grey water inlet.
  • the first filter is configured to substantially block the housing between the grey water inlet and the first grey water outlet, such that grey water cannot pass between the inlet and the outlet without passing through the first filter.
  • the first filter may be located on the first filter support portion of the filter receiving portion.
  • the first filter may include one or more float devices. Each float device being operable to move the disinfectant element within the housing during use.
  • the one or more float devices may be operable to move the disinfectant element between a first low position and a second high position.
  • the one or more float devices may be located below the first filter.
  • the disinfectant element may be connected to a support rod.
  • the one or more float devices may be connected to the support rod.
  • the support rod may be configured to pass through the first filter.
  • the support rod may be moveable with respect to the first filter.
  • the one or more float devices may include a ball float, or first float device.
  • the ball float being located below the first filter.
  • the ball float may be connected to the support rod. In this arrangement the ball float may move the support rod and the disinfectant element along the longitudinal axis of the housing in use.
  • the one or more float devices may also include a disc float, or second float device.
  • the disc float being located above the first filter.
  • the disc float may be connected to the support rod.
  • the disc float may be spaced from an upper surface of the first filter.
  • the disinfectant element may be a disc-shaped member.
  • the disinfectant element may be a solid block of disinfectant.
  • the disinfectant element may be connected to the support rod.
  • the disinfectant element may be spaced from an upper surface of the first filter.
  • the disinfectant element may be spaced from an upper surface of the disc float.
  • the housing may be configured to receive the disinfectant element in a position above the grey water inlet.
  • the housing may be configured to receive the disinfectant element in a position above the first grey water outlet.
  • the housing may be configured to receive the disinfectant element in a position above the second grey water outlet.
  • the housing may be configured to receive the disinfectant element in a position above the first grey water outlet and in a position above the second grey water outlet.
  • the filter apparatus may be configurable to allow grey water entering the housing from the grey water inlet to exit the housing without passing through the disinfectant element.
  • the disinfectant element may be supported by a frame member.
  • the frame member may comprise a porous portion.
  • the porous portion may be a planar member.
  • the porous portion may be a mesh structure.
  • the mesh structure may provide support to the disinfectant element.
  • the frame member may be configured to allow water vapour to contact the disinfectant element. In this arrangement, water vapour may contact the disinfectant element and subsequently fall into the grey water within the housing. In this arrangement, a portion of the disinfectant element is added to the grey water.
  • the frame member may be configured to allow any splashes resulting from the addition of grey water to the housing to make contact with the disinfectant element. In this arrangement a portion of the disinfectant element is added to the grey water.
  • the frame member may be configured such that the disinfectant element remains in a fixed position.
  • the housing may have one or more protrusions on the upper region of the inner wall.
  • the protrusions on the inner wall of the upper region of the housing may engage with the disc float to provide stability when in its uppermost position.
  • the first filter, disinfectant element and one or more float devices may be configured such that the one or more float devices are operable to move the disinfectant element along the longitudinal axis of the housing during use. In use, the one or more float devices are operable to move the disinfectant element between a first position in which the disinfectant element is located below the grey water inlet and a second position in which the disinfectant element is located above the grey water inlet.
  • the second filter may include a frame member, the frame member being configured to house a filter element.
  • the frame member may include a plurality of apertures.
  • the filter element may be a flexible filter element.
  • the filter element may be a pouch.
  • the filter element may be supported by the frame member.
  • the frame member may provide support to the opening of the filter element.
  • the second filter element may be a coil filter.
  • the second filter may be a substantially spiral-shaped filter element.
  • the second filter may be a substantially planar member.
  • the second filter may be a substantially planar member made from a flexible material. In this arrangement, the second filter may be rolled to form a substantially spiral-shaped filter element.
  • the frame member may be located on the second filter support portion.
  • the frame member may include a lip portion that allows the second filter to engage with the second filter support portion and be suspended therefrom.
  • the frame member may be substantially cylindrical in shape.
  • the second filter may be located below the first filter. An upper portion of the second filter may be configured to abut against a lower portion of the first filter.
  • the second filter may be operable to filter particles larger than
  • the second filter may be operable to filter particles larger than approximately 40 m to 60pm.
  • the second filter may be made from cotton.
  • the second filter may be a cotton pouch, or the like.
  • the first filter and the second filter are separable from one another.
  • the filter apparatus may further include a storage tank, the storage tank being configured to store filtered grey water from the filter apparatus.
  • the storage tank may be connectable to the first grey water outlet.
  • the storage apparatus may be a storage tank for a grey water recycling system.
  • the filter apparatus is located externally to the storage tank.
  • the storage tank may be a cistern for a lavatory.
  • the storage tank may be configured to be connectable to a lavatory.
  • the filter apparatus may include a pump, the pump being operable to pump grey water in the storage tank to another location.
  • the other location may be a cistern for a lavatory.
  • the storage tank may be configured to be connectable to a drainage system.
  • the storage tank may be associated with a control valve.
  • the control valve being operable to allow grey water within the storage tank to flow to the drainage system.
  • the control valve may be a manually- operated valve.
  • the storage tank may include a further water inlet.
  • the further water inlet may be configured to allow the storage tank to be filled with water from an external source.
  • the external source may be a source of potable water.
  • the storage tank may be associated with a further control valve.
  • the further control valve being operable to allow water from the further water inlet to enter the storage tank, but not to exit.
  • the valve may be a check valve, one-way valve, double check valve, or the like.
  • the storage tank may include a float valve to open and/or close the first grey water outlet of the filter housing.
  • the float valve may be a ball float type, or the like.
  • Embodiments the second aspect of the present invention may include one or more features of the first aspect of the present invention or their embodiments.
  • a grey water recycling system comprising:
  • a filter apparatus comprising:
  • the housing comprising:
  • the filter being located between the grey water inlet and the first grey water outlet,
  • housing is configured such that, in use, grey water may flow from the inlet through the filter to the first grey water outlet, or from the inlet directly to the second grey water outlet;
  • the storage tank being connectable to the first grey water outlet.
  • the filter apparatus is located externally to the storage tank.
  • the storage tank may be connectable to a cistern for a lavatory.
  • the storage tank may be a cistern for a lavatory.
  • the second grey water outlet may be configured to by-pass the storage tank.
  • the system may further comprise a pump, the pump being operable to pump grey water in the storage tank to another location. The other location may be a lavatory.
  • Embodiments the third aspect of the present invention may include one or more features of the first or second aspects of the present invention or their embodiments.
  • Fig. 1 is a front view of a filter housing and filter apparatus according to the first and second aspects of the present invention
  • Fig. 2 is a partially exploded view of the filter housing and filter apparatus of Fig. 1 ;
  • Fig. 3 is a cut away view of the filter housing and filter apparatus of
  • Fig. 4a is a cut away side view of an alternative filter housing and filter apparatus
  • Fig. 4b is a side view of the filter and float mechanism of Fig. 4a;
  • Fig. 5 is a cut away side view of a further alternative filter housing and filter apparatus.
  • Fig. 6 is a schematic of a grey water recycling system according to a further embodiment of the invention. Description of preferred embodiments
  • a filter housing/apparatus 1 for a grey water recycling system is illustrated.
  • the filter housing or filter apparatus 1 is suitable for use with a grey water filtering system. That is the filter housing or filter apparatus may be suitable for use with a grey water recycling system or a grey water filtering system.
  • the housing 10 has a grey water inlet 10a, a first grey water outlet 10b, a second grey water outlet 10c and a third grey water outlet 10d.
  • the housing 10 is generally cylindrical in shape and has a longitudinal axis 10e.
  • the housing 10 has an upper portion 10f and a lower portion 10g.
  • the housing 10 has a removable lid member 10h.
  • the lid member 10h may be detachably removable from the housing 10.
  • the lid member 10h includes a seal (O-ring) 10i that allows the lid member 10h to be in a sealed in connection with the housing 10.
  • the housing 10 and the lid member 10h are configured to allow access to the inside of the housing 10 when the lid member 10h is removed.
  • the lid member 10h may be screwed into engagement with the housing 10.
  • the housing 10 also has a removable base member 10j.
  • the base member 10j is detachably removable from the housing 10.
  • the housing 10 and the base member 10j are configured to allow access to the inside of the housing 10 when the base member 10j is removed.
  • the base member 10 j may be screwed into engagement with the housing 10.
  • the base member 10 j includes a seal (O-ring) 10i that allows the base member 10 j to be in a sealed in connection with the housing 10.
  • the housing 10 may be made from acrylonitrile butadiene styrene (ABS).
  • ABS acrylonitrile butadiene styrene
  • the housing 10 may be made from other suitable materials, such as other plastics materials.
  • housing/apparatus 1 is used with a domestic or commercial grey water recycling system, such as one that uses domestic waste water from a shower, bath, hand basin, or the like, to be filtered and used to fill the cistern of a lavatory.
  • a domestic or commercial grey water recycling system such as one that uses domestic waste water from a shower, bath, hand basin, or the like, to be filtered and used to fill the cistern of a lavatory.
  • the housing/apparatus 1 may be used in other systems where grey water is required to be treated by filtering, disinfecting, or the like.
  • the grey water inlet 10a is connectable to a source of grey water 12, which may be the outlet from a domestic shower, bath, hand basin, or the like.
  • the grey water inlet 10a is located on a side wall 101 towards the upper portion 10f of the housing 10.
  • the grey water inlet 10a is substantially cylindrical in shape.
  • the first grey water outlet 10b is configured to be connectable to a grey water storage tank 14, as described further below.
  • the first grey water outlet 10b is located on the side wall 101 towards the lower portion 10g of the housing 10.
  • the first grey water outlet 10b is substantially cylindrical in shape.
  • the second grey water outlet 10c is configured to be connectable to a drainage system 16.
  • the second grey water outlet 10c is located on the side wall 10I towards the upper portion 10f of the housing 10.
  • the second grey water outlet 10c is substantially cylindrical in shape.
  • the filter housing/apparatus 1 also includes a filter receiving portion 10m.
  • the filter receiving portion 10m is configured to receive and secure a filter element 18 therein.
  • the grey water inlet 10a is located above the filter receiving portion 10m.
  • the first grey water outlet 10b is located below the filter receiving portion 10m.
  • the second grey water outlet 10c is located above the filter receiving portion 10m. As described further below, the second grey water outlet 10c is configured to allow grey water entering the housing 10 from the grey water inlet 10a to exit the housing 10 without passing through the filter receiving portion/filter.
  • the grey water inlet 10a and the second grey water outlet 10c are located at substantially the same height above the filter receiving portion 10m/filter element 18. That is the grey water inlet 10a and the second grey water outlet 10c are located at the same height position beneath the lid member 10h.
  • the grey water inlet 10a and the second grey water outlet 10c are substantially in alignment with one another.
  • the housing 10 is configured such that, in use, grey water may flow from the inlet 10a through the filter receiving portion 10m/filter element 18 to the first grey water outlet 10b, or from the inlet 10a directly to the second grey water outlet 10c. That is, the housing 10 is configured such that, in use, grey water may initially flow from the inlet 10a through the filter receiving portion 10m/filter element 18 to the first grey water outlet 10b and then from the inlet 10a to the second grey water outlet 10c. The housing 10 is configured such that, in use, grey water may start to flow from the inlet 10a to the second grey water outlet 10c once grey water can no longer flow through the filter receiving portion 10m/filter element 18 to the first grey water outlet 10b.
  • the third grey water outlet 10d is configured to be connectable to the drainage system 16.
  • the third grey water outlet 10d is associated with a control valve 10d'.
  • the control valve 10d' being operable to allow grey water within the housing 10 to flow out of the third grey water outlet 10d to the drainage system 16.
  • the control valve 10d' may be a manually- operated valve.
  • the third grey water outlet 10d is on the base member 10 j of the housing 10. That is, the third grey water outlet 10d passes through the base member 10j.
  • the third grey water outlet 10d is substantially cylindrical in shape.
  • the third grey water outlet 10d is located below the filter receiving portion 10m/filter element 18.
  • the third grey water outlet 10d is therefore be located below the grey water inlet 10a.
  • the filter receiving portion 10m is configured to receive and support the filter element 18.
  • the filter element 18 includes a first filter element 18a and a second filter element 18b.
  • the filter receiving portion 10m includes a first filter support portion 10m'.
  • the first filter support portion 10m' is located between the grey water inlet 10a and the first grey water outlet 10b, such that the first filter element 18a may be located between the grey water inlet 10a and the first grey water outlet 10b.
  • the first filter support portion 10m' is a flange portion that circumscribes the inner wall 10 ⁇ of the housing 10, such that the first filter element 18a may be supported by a top surface 1 1 of the flange.
  • the filter receiving portion 10m also includes a second filter support portion 10m".
  • the second filter support portion 10m" is formed with the first filter support portion 10m'.
  • the second filter support portion 10m" is also located between the grey water inlet 10a and the first grey water outlet 10b.
  • the second filter support portion 10m" is configured to suspend the second filter element 18b therefrom.
  • the second filter support portion 10m" is a substantially U-shaped channel portion that circumscribes the inner wall 10 ⁇ of the housing 10, such that the second filter element 18b may be suspended from the channel portion.
  • the filter element 18 is a two stage filter having a first filter element 18a and a second filter element 18b. It should, however, be appreciated that the filter element 18 may be a single stage filter, or a multi-stage filter having two or more filter elements.
  • the filter element 18 is located between the grey water inlet 10a and the first grey water outlet 10b.
  • the first filter element 18a is a
  • the first filter element 18a may be operable to filter particles larger than approximately 100pm.
  • the first filter may, for example, be made from a Scotch BriteTM material.
  • the first filter element 18a may be a substantially solid block of filter material.
  • the first filter element 18a may be configured to provide an interference fit with the inner wall 10I of the housing 10. As illustrated, the first filter element 18a is located below the grey water inlet 10a.
  • the first filter element 18a is configured to substantially block the housing 10 between the grey water inlet 10a and the first grey water outlet 10b, such that grey water cannot pass between the inlet 10a and the outlet 10b without passing through the first filter element 18a.
  • the first filter element 18a is located on the first filter support portion 10m' of the filter receiving portion 10m.
  • the second filter element 18b includes a frame member 18c, the frame member 18c being configured to house a pouch filter 19, such as a cotton pouch (an example of a flexible filter element).
  • the frame member 18c is generally cylindrical in shape and includes a plurality of apertures 18c'. In use the pouch filter 19 is wrapped over the top of the frame member 18c with the main body of the pouch filter 19 being located outside the frame member 18c, such that grey water may pass from the first filter element 18a through the pouch filter 19 to the first grey water outlet 10b.
  • the second filter element 18b includes a correspondingly-shaped channel engagement portion to that of the second filter support portion 10m" that allows the second filter element 18b to engage with the second filter support portion 10m" and be suspended therefrom.
  • the filter receiving portion 10m therefore provides two filter element support portions 10m' and 10m".
  • the second filter element 18b is operable to filter particles larger than approximately 40 m .
  • the second filter element 18b may be of any suitable size, depending on the usage of the system.
  • the first filter element 18a and the second filter element 18b are separable from one another.
  • Figs. 4a and 4b illustrate an alternative embodiment of the filter
  • the arrangement of the housing are identical to the housing 10 of filter housing/apparatus 1 .
  • the only difference between the two embodiments is that the first filter element 18a' has a different arrangement, and that protrusions 10n are included in the inner wall of the housing.
  • the first filter element 18a' includes a float device 20.
  • the float device 20 includes a first float member 20a and a second float member 20b.
  • the apparatus 1 may include a single float device.
  • the first filter element 18a' includes a support rod 22 to which the first and second float members 20a, 20b are connected.
  • the support rod 22 runs through the centre of first filter element 18a' and is not connected to the first filter element 18a'.
  • the first filter element 18a' also includes a disinfectant element 24 attached to the uppermost part of the support rod 22.
  • the disinfectant element 24 is a solid disinfectant, which in the embodiment illustrated and described here is a disc-shaped.
  • the float device 20 is operable to move the disinfectant element 24 within the housing 10 during use.
  • the float device 20 is operable to move the disinfectant element 24 between a first low position and a second high position.
  • the first float member 20a is located above the filter element 18a' and the second float member 20b is located below the first filter element 18a'.
  • the first float member 20a is a disc float and the second float member 20b is a ball float.
  • the first and second float members 20a, 20b are buoyancy members that are operable to float inside the housing 10.
  • the disc float 20a is spaced from an upper surface of the first filter 18a' to allow grey water to flow through the filter. In this arrangement the disc float 20a may move the support rod 22 and the disinfectant element 24 along the longitudinal axis 10e of the housing 10 in use.
  • Fig. 4a illustrates a position in which the float device 20 has raised the disinfectant element 24 to its uppermost position within the housing 10. In this position it can be seen that the disinfectant element 24 is positioned above the grey water inlet 10a and the second grey water outlet 10c.
  • the housing 10 also includes protrusions 10n on the inner wall 10 ⁇ of the housing 10. The protrusions 10n add stability to the float device 20 at this position by engaging with the first float element 20a. The operation of the apparatus 1 will be described further below. However, it should be noted that in the position illustrated in Fig.
  • Fig. 5 illustrates a further alternative embodiment of the filter
  • the arrangement of the housing are generally identical to the housing 10 of the filter housing/apparatus 1 of the second embodiment. A difference between the two embodiments is that the second filter element 18b has a different arrangement, and that the disinfectant element 24 has a different arrangement.
  • the second filter element 18b is a coil filter element. In this arrangement the second filter element 18b is a
  • the first filter element 18a could be a coil filter element.
  • the first filter element 18a could be a substantially planar member made from a flexible material.
  • the first filter element 18a may be rolled to form a substantially spiral-shaped filter element.
  • the housing 10 is configured to receive the disinfectant element 24 at a position above the grey water inlet 10a, the first grey water outlet 10b and the second grey water outlet 10c.
  • the disinfectant element 24 is supported by a frame member 25a comprising a porous portion 25b, which is a planar mesh structure 25b configured to provide support to the disinfectant element 24.
  • the frame member 25a is configured to allow water vapour to contact the disinfectant element 24 before falling into the grey water within the housing 10. In this arrangement, a portion of the disinfectant element 24 is added to the grey water.
  • the frame member 25a could also be configured to allow splashes resulting from the addition of grey water to the housing 10 to make contact with the disinfectant element 24, such that a portion of the disinfectant element 24 is added to the grey water.
  • the frame member 25a is configured such that the disinfectant element 24 remains in a fixed position. Once the disinfectant element 24 has been consumed, it can be replaced by removing the top portion 10h.
  • the apparatus 1 is illustrated in use with a grey water storage tank 14 and other components of a grey water recycling system 2.
  • the storage tank 14 is configured to store filtered grey water from the filter apparatus 1 .
  • the storage tank 14 is connectable to the first grey water outlet 10b.
  • the filter apparatus 1 is located externally to the storage tank 14.
  • the storage tank 14 may be a cistern for a lavatory.
  • the storage tank 14 may supply filtered grey water to a cistern for a lavatory.
  • the storage tank 14 may be, for example, a 70 litre tank.
  • the storage tank 14 may have a capacity that is suitable for the required usage.
  • the storage tank has an outlet 14a which is connectable to a lavatory.
  • the system 2 may include a pump (not illustrated) to pump the filtered grey water to the lavatory.
  • the filtered grey water may be gravity-fed to the lavatory.
  • the storage tank 14 is also connectable to the drainage system 16.
  • the storage tank 14 has a control valve 14b.
  • the control valve 14b being operable to allow grey water within the storage tank 14 to flow to the drainage system 16.
  • the control valve 14b is a manually-operated valve.
  • the drainage system 16 may be connected to a soil vent pipe, or the like.
  • the storage tank 14 also includes a further water inlet 14c.
  • the further water inlet 14c is configured to allow the storage tank 14 to be filled with water from an external source, such as a source of potable water 14d.
  • the storage tank 14 is also associated with a further control valve 14e.
  • the further control valve 14e being operable to allow water from the further water inlet 14c to enter the storage tank 14, but not to exit.
  • the valve 14e may be a check valve, one-way valve, or the like.
  • the control valve 14e may be an automated valve that is operable to fill the storage tank 14 with water when it detects that the storage tank 14 is empty.
  • the third grey water outlet 10d is also connected to the drainage system 16 via control valve 10d'.
  • grey water from the source of grey water 12 enters the housing 10 via the grey water inlet 10a.
  • the grey water is filtered by the filter element 18 and passes into the storage tank 14 via first grey water outlet 10b.
  • the first filter element 18a may be used to filter larger particles/material than the second filter element 18b.
  • the first filter element 18a is disposable.
  • the second filter element 18b may be removed from the system 2 and cleaned and returned thereto. Typically this involves cleaning the pouch filter 19.
  • the system 2 may feed the filtered grey water in the storage tank 14 to a lavatory via a gravity feed or a pump.
  • the control vale 14e may also operate to fill the storage tank 14 with potable water if there is no supply of grey water to the storage tank 14.
  • the float device 20 raises the disinfectant element 24 (if used) to the position illustrated in Fig. 4a.
  • the disinfectant element 24 is above the grey water inlet 10a and the second grey water outlet 10c. In this condition the lifespan of the disinfectant element 24 is increased as it is not submerged in grey water.
  • the housing 10 is therefore configured such that, in use, grey water may initially flow from the inlet 10a through the filter receiving portion 10m/filter element 18 to the first grey water outlet 10b and then from the inlet 10a to the second grey water outlet 10c.
  • the housing 10 is therefore configured such that, in use, grey water may start to flow from the inlet 10a to the second grey water outlet 10c once grey water can no longer flow through the filter receiving portion 10m/filter element 18 to the first grey water outlet 10b.
  • the lid member 10h may be removed to allow access to the first filter element 18a, float device 20 and disinfectant element 24.
  • the base member 10j may be removed (after draining the housing 10 with control valve 10d') to allow access to the second filter element 18b.
  • the storage tank 14 may also include an access panel 15 that allows access to the storage tank 14 for
  • the filter housing/apparatus 1 of the present invention provides for easy access and maintenance of the system 2. This is partly due to the reason that the filter housing/apparatus 1 is located externally from the storage tank 14. This is also due to the fact that the housing 10 is accessible via the lid member 10h and/or the base member 10j.
  • the second embodiment of the filter element 18 also provides for an increased lifespan of the disinfectant element 24 since the disinfectant element 24 is capable of being raised out of the flow of grey water between the inlet 10a and the second outlet 10c when the storage tank 14 is at its maximum capacity.
  • the filter housing/apparatus 1 and system 2 of the present invention provides for simpler maintenance and increased operating lifespan for consumable components, such as disinfectant elements.

Abstract

A filter apparatus for a grey water recycling system comprising a housing, the housing comprising a grey water inlet, a first grey water outlet, a second grey water outlet and a filter, the filter being located between the grey water inlet and the first grey water outlet, wherein the housing is configured such that, in use, grey water may flow from the inlet through the filter to the first grey water outlet, or from the inlet directly to the second grey water outlet. The housing may further comprise a disinfectant element.

Description

FILTERING APPARATUS FOR A GREY WATER RECYCLING SYSTEM
Field of the invention This invention relates to a filter housing and particularly, but not exclusively, a filter housing for a grey water recycling system.
Background to the invention Conventional grey water recycling systems work well at filtering and recycling waste water for reuse for other applications. However, such known systems are often complex, with the filter elements thereof being difficult to access. This makes the system difficult and time consuming to maintain.
It would therefore be desirable to provide a grey water recycling system which is simpler and easier to maintain. The present inventor has appreciated the shortcomings with such conventional grey water recycling systems.
Summary of the invention
According to a first aspect of the present invention there is provided a filter housing for a grey water recycling system comprising:
a grey water inlet;
a first grey water outlet;
a second grey water outlet; and
a filter receiving portion, the filter receiving portion being located between the grey water inlet and the first grey water outlet,
wherein the housing is configured such that, in use, grey water may flow from the inlet through the filter receiving portion to the first grey water outlet, or from the inlet directly to the second grey water outlet.
According to a second aspect of the present invention there is provided a filter apparatus for a grey water recycling system comprising:
a housing, the housing comprising:
a grey water inlet;
a first grey water outlet;
a second grey water outlet; and
a filter, the filter being located between the grey water inlet and the first grey water outlet,
wherein the housing is configured such that, in use, grey water may flow from the inlet through the filter to the first grey water outlet, or from the inlet directly to the second grey water outlet.
The filter housing or filter apparatus may be suitable for use with a grey water filtering system. That is the filter housing or filter apparatus may be suitable for use with a grey water recycling system or a grey water filtering system. The housing may be configured such that, in use, grey water may initially flow from the inlet through the filter receiving portion/filter to the first grey water outlet and then from the inlet to the second grey water outlet. The housing may be configured such that, in use, grey water may start to flow from the inlet to the second grey water outlet once grey water can no longer flow through the filter receiving portion/filter to the first grey water outlet.
The housing may be generally cylindrical in shape. The housing may have a longitudinal axis. The housing may have an upper portion and a lower portion. The housing may have a removable lid member. The lid member may be detachably removable from the housing. The lid member may include a seal, such that the lid is in a sealed engagement with the housing. The housing and the lid member may be configured to allow access to the inside of the housing when the lid member is removed. The housing may have a removable base member. The base member may be detachably removable from the housing. The base member may include a seal, such that the base is in a sealed engagement with the housing. The housing and the base member may be configured to allow access to the inside of the housing when the base member is removed.
The housing may be made from a plastics material. The housing may be made from acrylonitrile butadiene styrene (ABS). The grey water inlet may be configured to be connectable to a source of grey water. The source of grey water may be waste water from a domestic shower, bath, a swimming pool, health club or gymnasium facilities, hand basin, or the like. The grey water inlet may be located towards the upper portion of the housing. The grey water inlet may be located on a side wall portion of the housing. The grey water inlet may substantially cylindrical in shape. The grey water inlet may be located above the filter receiving portion/filter.
The first grey water outlet may be configured to be connectable to a grey water storage tank. The grey water storage tank may be a filtered grey water storage tank. The first grey water outlet may be located towards the lower portion of the housing. The first grey water outlet may be located on a side wall portion of the housing. The first grey water outlet may be substantially cylindrical in shape. The first grey water outlet may be located below the filter receiving portion/filter. The first grey water outlet may therefore be located below the grey water inlet. The first grey water outlet may include a valve that may be selectively operable to allow or prevent grey water passing therethrough.
The second grey water outlet may be configured to be connectable to a drainage system. The second grey water outlet may be configured to allow grey water entering the housing from the grey water inlet to exit the housing without passing through the filter receiving portion/filter.
The second grey water outlet may be located towards the upper portion of the housing. The second grey water outlet may be located on a side wall portion of the housing. The second grey water outlet may be substantially cylindrical in shape. The second grey water outlet may be located above the filter receiving portion/filter. The grey water inlet and the second grey water outlet may be located at substantially the same height above the filter receiving portion/filter. That is the grey water inlet and the second grey water outlet may be located at the same height position beneath the lid member. The grey water inlet and the second grey water outlet may be substantially in alignment with one another. The grey water inlet and the second grey water outlet may be substantially in axial alignment with one another.
The housing may further comprise a third grey water outlet. The third grey water outlet may be configured to be connectable to a drainage system. The third grey water outlet may be associated with a control valve. The control valve being operable to allow grey water within the housing to flow out of the third grey water outlet to the drainage system. The control valve may be a manually-operated valve.
The third grey water outlet may be located towards the lower portion of the housing. The third grey water outlet may be located on the base member of the housing. That is, the third grey water outlet passes through the base member. The third grey water outlet may be substantially cylindrical in shape. The third grey water outlet may be located below the filter receiving portion/filter. The third grey water outlet may therefore be located below the grey water inlet.
The filter receiving portion may be configured to receive and support at least one filter element therein. The filter receiving portion may include a first filter support portion. The first filter support portion may be located between the grey water inlet and the first grey water outlet, such that a filter element may be located between the grey water inlet and the first grey water outlet. The first filter support portion may be one or more protrusions that extend from the side wall of the housing. The first filter support portion may be a flange portion that circumscribes the inner wall of the housing, such that a filter element may be supported by a top surface of the flange. The filter receiving portion may include a second filter support portion. The second filter support portion may be formed with the first filter support portion. The second filter support portion may be located between the grey water inlet and the first grey water outlet. The second filter support portion may be configured to suspend a filter element therefrom. The second filter support portion may be one or more protrusions that extend from the side wall of the housing. The second filter support portion may be a substantially U-shaped channel portion that circumscribes the inner wall of the housing, such that a filter element may be suspended from the channel portion. The filter element may include a correspondingly-shaped channel engagement portion that allows the filter element to engage with the second filter support portion and be suspended therefrom. The filter receiving portion may therefore provide two filter element support portions.
The filter receiving portion may be configured to receive and support at least one disinfectant element or member therein. The at least one disinfectant element may be associated and/or connected to the one or more filter elements.
The filter element may be a single stage filter. The filter element may include a single filter. The filter may be a two stage filter. The filter element may include two filters. The filter may be a multi-stage filter. The filter element may include more than two filters. The filter element may be located between the grey water inlet and the first grey water outlet. The first filter may be a substantially disc-shaped filter element. The first filter may be operable to filter particles larger than approximately 100pm. The first filter may be made from a Scotch Brite™ material. The first filter may be a substantially solid block of filter material. The first filter may be configured to provide an interference fit with the internal surface of the housing.
The first filter element may be a coil filter. The first filter may be a substantially spiral-shaped filter element. The first filter may be a substantially planar member. The first filter may be a substantially planar member made from a flexible material. In this arrangement, the first filter may be rolled to form a substantially spiral-shaped filter element. The first filter may be located between the grey water inlet and the first grey water outlet. The first filter may be located below the grey water inlet. The first filter is configured to substantially block the housing between the grey water inlet and the first grey water outlet, such that grey water cannot pass between the inlet and the outlet without passing through the first filter.
The first filter may be located on the first filter support portion of the filter receiving portion. The first filter may include one or more float devices. Each float device being operable to move the disinfectant element within the housing during use. The one or more float devices may be operable to move the disinfectant element between a first low position and a second high position. The one or more float devices may be located below the first filter.
The disinfectant element may be connected to a support rod. The one or more float devices may be connected to the support rod. The support rod may be configured to pass through the first filter. The support rod may be moveable with respect to the first filter.
The one or more float devices may include a ball float, or first float device. The ball float being located below the first filter. The ball float may be connected to the support rod. In this arrangement the ball float may move the support rod and the disinfectant element along the longitudinal axis of the housing in use.
The one or more float devices may also include a disc float, or second float device. The disc float being located above the first filter. The disc float may be connected to the support rod. The disc float may be spaced from an upper surface of the first filter.
The disinfectant element may be a disc-shaped member. The disinfectant element may be a solid block of disinfectant. The disinfectant element may be connected to the support rod. The disinfectant element may be spaced from an upper surface of the first filter. The disinfectant element may be spaced from an upper surface of the disc float. The housing may be configured to receive the disinfectant element in a position above the grey water inlet. The housing may be configured to receive the disinfectant element in a position above the first grey water outlet. The housing may be configured to receive the disinfectant element in a position above the second grey water outlet. The housing may be configured to receive the disinfectant element in a position above the first grey water outlet and in a position above the second grey water outlet.
The filter apparatus may be configurable to allow grey water entering the housing from the grey water inlet to exit the housing without passing through the disinfectant element.
The disinfectant element may be supported by a frame member. The frame member may comprise a porous portion. The porous portion may be a planar member. The porous portion may be a mesh structure. The mesh structure may provide support to the disinfectant element. The frame member may be configured to allow water vapour to contact the disinfectant element. In this arrangement, water vapour may contact the disinfectant element and subsequently fall into the grey water within the housing. In this arrangement, a portion of the disinfectant element is added to the grey water. The frame member may be configured to allow any splashes resulting from the addition of grey water to the housing to make contact with the disinfectant element. In this arrangement a portion of the disinfectant element is added to the grey water. The frame member may be configured such that the disinfectant element remains in a fixed position.
The housing may have one or more protrusions on the upper region of the inner wall. The protrusions on the inner wall of the upper region of the housing may engage with the disc float to provide stability when in its uppermost position.
The first filter, disinfectant element and one or more float devices may be configured such that the one or more float devices are operable to move the disinfectant element along the longitudinal axis of the housing during use. In use, the one or more float devices are operable to move the disinfectant element between a first position in which the disinfectant element is located below the grey water inlet and a second position in which the disinfectant element is located above the grey water inlet.
The second filter may include a frame member, the frame member being configured to house a filter element. The frame member may include a plurality of apertures. The filter element may be a flexible filter element. The filter element may be a pouch. The filter element may be supported by the frame member. The frame member may provide support to the opening of the filter element.
The second filter element may be a coil filter. The second filter may be a substantially spiral-shaped filter element. The second filter may be a substantially planar member. The second filter may be a substantially planar member made from a flexible material. In this arrangement, the second filter may be rolled to form a substantially spiral-shaped filter element. The frame member may be located on the second filter support portion. The frame member may include a lip portion that allows the second filter to engage with the second filter support portion and be suspended therefrom. The frame member may be substantially cylindrical in shape. The second filter may be located below the first filter. An upper portion of the second filter may be configured to abut against a lower portion of the first filter.
The second filter may be operable to filter particles larger than
approximately 40 m . The second filter may be operable to filter particles larger than approximately 40 m to 60pm. The second filter may be made from cotton. The second filter may be a cotton pouch, or the like.
The first filter and the second filter are separable from one another.
The filter apparatus may further include a storage tank, the storage tank being configured to store filtered grey water from the filter apparatus. The storage tank may be connectable to the first grey water outlet. The storage apparatus may be a storage tank for a grey water recycling system. The filter apparatus is located externally to the storage tank. The storage tank may be a cistern for a lavatory.
The storage tank may be configured to be connectable to a lavatory. The filter apparatus may include a pump, the pump being operable to pump grey water in the storage tank to another location. The other location may be a cistern for a lavatory.
The storage tank may be configured to be connectable to a drainage system. The storage tank may be associated with a control valve. The control valve being operable to allow grey water within the storage tank to flow to the drainage system. The control valve may be a manually- operated valve. The storage tank may include a further water inlet. The further water inlet may be configured to allow the storage tank to be filled with water from an external source. The external source may be a source of potable water. The storage tank may be associated with a further control valve. The further control valve being operable to allow water from the further water inlet to enter the storage tank, but not to exit. The valve may be a check valve, one-way valve, double check valve, or the like.
The storage tank may include a float valve to open and/or close the first grey water outlet of the filter housing. The float valve may be a ball float type, or the like.
Embodiments the second aspect of the present invention may include one or more features of the first aspect of the present invention or their embodiments.
According to a third aspect of the present invention there is provided a grey water recycling system comprising:
a filter apparatus comprising:
a housing, the housing comprising:
a grey water inlet;
a first grey water outlet;
a second grey water outlet; and
a filter, the filter being located between the grey water inlet and the first grey water outlet,
wherein the housing is configured such that, in use, grey water may flow from the inlet through the filter to the first grey water outlet, or from the inlet directly to the second grey water outlet;
a storage tank, the storage tank being connectable to the first grey water outlet.
The filter apparatus is located externally to the storage tank.
The storage tank may be connectable to a cistern for a lavatory. The storage tank may be a cistern for a lavatory. The second grey water outlet may be configured to by-pass the storage tank. The system may further comprise a pump, the pump being operable to pump grey water in the storage tank to another location. The other location may be a lavatory.
Embodiments the third aspect of the present invention may include one or more features of the first or second aspects of the present invention or their embodiments.
Brief description of the drawings An embodiment of the invention will now be described, by way of example, with reference to the drawings, in which:
Fig. 1 is a front view of a filter housing and filter apparatus according to the first and second aspects of the present invention;
Fig. 2 is a partially exploded view of the filter housing and filter apparatus of Fig. 1 ;
Fig. 3 is a cut away view of the filter housing and filter apparatus of
Fig. 1 ;
Fig. 4a is a cut away side view of an alternative filter housing and filter apparatus;
Fig. 4b is a side view of the filter and float mechanism of Fig. 4a;
Fig. 5 is a cut away side view of a further alternative filter housing and filter apparatus; and
Fig. 6 is a schematic of a grey water recycling system according to a further embodiment of the invention. Description of preferred embodiments
With reference to Figs. 1 to 3, a filter housing/apparatus 1 for a grey water recycling system is illustrated. The filter housing or filter apparatus 1 is suitable for use with a grey water filtering system. That is the filter housing or filter apparatus may be suitable for use with a grey water recycling system or a grey water filtering system. The housing 10 has a grey water inlet 10a, a first grey water outlet 10b, a second grey water outlet 10c and a third grey water outlet 10d.
The housing 10 is generally cylindrical in shape and has a longitudinal axis 10e. The housing 10 has an upper portion 10f and a lower portion 10g. The housing 10 has a removable lid member 10h. The lid member 10h may be detachably removable from the housing 10. As illustrated in Fig. 2, the lid member 10h includes a seal (O-ring) 10i that allows the lid member 10h to be in a sealed in connection with the housing 10. The housing 10 and the lid member 10h are configured to allow access to the inside of the housing 10 when the lid member 10h is removed. The lid member 10h may be screwed into engagement with the housing 10.
The housing 10 also has a removable base member 10j. The base member 10j is detachably removable from the housing 10. The housing 10 and the base member 10j are configured to allow access to the inside of the housing 10 when the base member 10j is removed. The base member 10 j may be screwed into engagement with the housing 10. The base member 10 j includes a seal (O-ring) 10i that allows the base member 10 j to be in a sealed in connection with the housing 10. In the embodiment illustrated and described here the housing 10 may be made from acrylonitrile butadiene styrene (ABS). However, it should be appreciated that the housing 10 may be made from other suitable materials, such as other plastics materials.
In the embodiment illustrated and described here the filter
housing/apparatus 1 is used with a domestic or commercial grey water recycling system, such as one that uses domestic waste water from a shower, bath, hand basin, or the like, to be filtered and used to fill the cistern of a lavatory. However, it should be appreciated that the housing/apparatus 1 may be used in other systems where grey water is required to be treated by filtering, disinfecting, or the like.
The grey water inlet 10a is connectable to a source of grey water 12, which may be the outlet from a domestic shower, bath, hand basin, or the like. The grey water inlet 10a is located on a side wall 101 towards the upper portion 10f of the housing 10. The grey water inlet 10a is substantially cylindrical in shape.
The first grey water outlet 10b is configured to be connectable to a grey water storage tank 14, as described further below.
The first grey water outlet 10b is located on the side wall 101 towards the lower portion 10g of the housing 10. The first grey water outlet 10b is substantially cylindrical in shape.
The second grey water outlet 10c is configured to be connectable to a drainage system 16. The second grey water outlet 10c is located on the side wall 10I towards the upper portion 10f of the housing 10. The second grey water outlet 10c is substantially cylindrical in shape. The filter housing/apparatus 1 also includes a filter receiving portion 10m. The filter receiving portion 10m is configured to receive and secure a filter element 18 therein.
The grey water inlet 10a is located above the filter receiving portion 10m. The first grey water outlet 10b is located below the filter receiving portion 10m. The second grey water outlet 10c is located above the filter receiving portion 10m. As described further below, the second grey water outlet 10c is configured to allow grey water entering the housing 10 from the grey water inlet 10a to exit the housing 10 without passing through the filter receiving portion/filter.
The grey water inlet 10a and the second grey water outlet 10c are located at substantially the same height above the filter receiving portion 10m/filter element 18. That is the grey water inlet 10a and the second grey water outlet 10c are located at the same height position beneath the lid member 10h. The grey water inlet 10a and the second grey water outlet 10c are substantially in alignment with one another.
Also, as described further below, the housing 10 is configured such that, in use, grey water may flow from the inlet 10a through the filter receiving portion 10m/filter element 18 to the first grey water outlet 10b, or from the inlet 10a directly to the second grey water outlet 10c. That is, the housing 10 is configured such that, in use, grey water may initially flow from the inlet 10a through the filter receiving portion 10m/filter element 18 to the first grey water outlet 10b and then from the inlet 10a to the second grey water outlet 10c. The housing 10 is configured such that, in use, grey water may start to flow from the inlet 10a to the second grey water outlet 10c once grey water can no longer flow through the filter receiving portion 10m/filter element 18 to the first grey water outlet 10b.
The third grey water outlet 10d is configured to be connectable to the drainage system 16. The third grey water outlet 10d is associated with a control valve 10d'. The control valve 10d' being operable to allow grey water within the housing 10 to flow out of the third grey water outlet 10d to the drainage system 16. The control valve 10d' may be a manually- operated valve.
The third grey water outlet 10d is on the base member 10 j of the housing 10. That is, the third grey water outlet 10d passes through the base member 10j. The third grey water outlet 10d is substantially cylindrical in shape. The third grey water outlet 10d is located below the filter receiving portion 10m/filter element 18. The third grey water outlet 10d is therefore be located below the grey water inlet 10a. In normal use of the apparatus 1 , the third grey water outlet 10d is closed by 10d' and only operated when water is required to be drained from the housing 10 for maintenance. As best illustrated in Fig. 3, the filter receiving portion 10m is configured to receive and support the filter element 18. As described further below, the filter element 18 includes a first filter element 18a and a second filter element 18b. The filter receiving portion 10m includes a first filter support portion 10m'. The first filter support portion 10m' is located between the grey water inlet 10a and the first grey water outlet 10b, such that the first filter element 18a may be located between the grey water inlet 10a and the first grey water outlet 10b. The first filter support portion 10m' is a flange portion that circumscribes the inner wall 10Γ of the housing 10, such that the first filter element 18a may be supported by a top surface 1 1 of the flange.
The filter receiving portion 10m also includes a second filter support portion 10m". The second filter support portion 10m" is formed with the first filter support portion 10m'. The second filter support portion 10m" is also located between the grey water inlet 10a and the first grey water outlet 10b. The second filter support portion 10m" is configured to suspend the second filter element 18b therefrom. The second filter support portion 10m" is a substantially U-shaped channel portion that circumscribes the inner wall 10Γ of the housing 10, such that the second filter element 18b may be suspended from the channel portion.
In the embodiment illustrated and described here the filter element 18 is a two stage filter having a first filter element 18a and a second filter element 18b. It should, however, be appreciated that the filter element 18 may be a single stage filter, or a multi-stage filter having two or more filter elements. The filter element 18 is located between the grey water inlet 10a and the first grey water outlet 10b.
With reference to Figs. 2 and 3, the first filter element 18a is a
substantially disc-shaped filter. The first filter element 18a may be operable to filter particles larger than approximately 100pm. The first filter may, for example, be made from a Scotch Brite™ material.
The first filter element 18a may be a substantially solid block of filter material. The first filter element 18a may be configured to provide an interference fit with the inner wall 10I of the housing 10. As illustrated, the first filter element 18a is located below the grey water inlet 10a. The first filter element 18a is configured to substantially block the housing 10 between the grey water inlet 10a and the first grey water outlet 10b, such that grey water cannot pass between the inlet 10a and the outlet 10b without passing through the first filter element 18a.
The first filter element 18a is located on the first filter support portion 10m' of the filter receiving portion 10m. The second filter element 18b includes a frame member 18c, the frame member 18c being configured to house a pouch filter 19, such as a cotton pouch (an example of a flexible filter element). The frame member 18c is generally cylindrical in shape and includes a plurality of apertures 18c'. In use the pouch filter 19 is wrapped over the top of the frame member 18c with the main body of the pouch filter 19 being located outside the frame member 18c, such that grey water may pass from the first filter element 18a through the pouch filter 19 to the first grey water outlet 10b.
The second filter element 18b includes a correspondingly-shaped channel engagement portion to that of the second filter support portion 10m" that allows the second filter element 18b to engage with the second filter support portion 10m" and be suspended therefrom.
The filter receiving portion 10m therefore provides two filter element support portions 10m' and 10m".
As illustrated in Fig. 3, an upper portion of the second filter element 18b abuts against a lower portion of the first filter element 18a. The second filter element 18b is operable to filter particles larger than approximately 40 m . However, it should be appreciated that the second filter element 18b may be of any suitable size, depending on the usage of the system.
The first filter element 18a and the second filter element 18b are separable from one another.
Figs. 4a and 4b illustrate an alternative embodiment of the filter
housing/apparatus 1 . In this embodiment the components and
arrangement of the housing are identical to the housing 10 of filter housing/apparatus 1 . The only difference between the two embodiments is that the first filter element 18a' has a different arrangement, and that protrusions 10n are included in the inner wall of the housing.
The first filter element 18a' includes a float device 20. The float device 20 includes a first float member 20a and a second float member 20b.
However, it should be appreciated that the apparatus 1 may include a single float device.
As illustrated in Figs. 4a and 4b, the first filter element 18a' includes a support rod 22 to which the first and second float members 20a, 20b are connected. The support rod 22 runs through the centre of first filter element 18a' and is not connected to the first filter element 18a'.
The first filter element 18a' also includes a disinfectant element 24 attached to the uppermost part of the support rod 22. The disinfectant element 24 is a solid disinfectant, which in the embodiment illustrated and described here is a disc-shaped. As described further below, the float device 20 is operable to move the disinfectant element 24 within the housing 10 during use. The float device 20 is operable to move the disinfectant element 24 between a first low position and a second high position. The first float member 20a is located above the filter element 18a' and the second float member 20b is located below the first filter element 18a'.
The first float member 20a is a disc float and the second float member 20b is a ball float. The first and second float members 20a, 20b are buoyancy members that are operable to float inside the housing 10.
The disc float 20a is spaced from an upper surface of the first filter 18a' to allow grey water to flow through the filter. In this arrangement the disc float 20a may move the support rod 22 and the disinfectant element 24 along the longitudinal axis 10e of the housing 10 in use.
As illustrated, the disinfectant element 24 is spaced from the top surface 20a' of the first float member 20a. It should be noted that Fig. 4a illustrates a position in which the float device 20 has raised the disinfectant element 24 to its uppermost position within the housing 10. In this position it can be seen that the disinfectant element 24 is positioned above the grey water inlet 10a and the second grey water outlet 10c. The housing 10 also includes protrusions 10n on the inner wall 10Γ of the housing 10. The protrusions 10n add stability to the float device 20 at this position by engaging with the first float element 20a. The operation of the apparatus 1 will be described further below. However, it should be noted that in the position illustrated in Fig. 4a grey water entering the housing 10 is flowing directly out of the second grey water outlet 10c, i.e. without being filtered and passing through the first grey water outlet 10b. In this position the disinfectant element 24 is not submerged in water. This increases the lifespan of the disinfectant element 24.
Fig. 5 illustrates a further alternative embodiment of the filter
housing/apparatus 1 . In this embodiment the components and
arrangement of the housing are generally identical to the housing 10 of the filter housing/apparatus 1 of the second embodiment. A difference between the two embodiments is that the second filter element 18b has a different arrangement, and that the disinfectant element 24 has a different arrangement.
In this further embodiment, the second filter element 18b is a coil filter element. In this arrangement the second filter element 18b is a
substantially planar member made from a flexible material and the second filter element 18b is rolled to form a coil filter element. It should, however be appreciated that the first filter element 18a could be a coil filter element. In this arrangement, the first filter element 18a could be a substantially planar member made from a flexible material. In this arrangement, the first filter element 18a may be rolled to form a substantially spiral-shaped filter element.
In this further embodiment, the housing 10 is configured to receive the disinfectant element 24 at a position above the grey water inlet 10a, the first grey water outlet 10b and the second grey water outlet 10c. The disinfectant element 24 is supported by a frame member 25a comprising a porous portion 25b, which is a planar mesh structure 25b configured to provide support to the disinfectant element 24. In this arrangement, the frame member 25a is configured to allow water vapour to contact the disinfectant element 24 before falling into the grey water within the housing 10. In this arrangement, a portion of the disinfectant element 24 is added to the grey water. It should also be understood, however that the frame member 25a could also be configured to allow splashes resulting from the addition of grey water to the housing 10 to make contact with the disinfectant element 24, such that a portion of the disinfectant element 24 is added to the grey water. In this further embodiment, the frame member 25a is configured such that the disinfectant element 24 remains in a fixed position. Once the disinfectant element 24 has been consumed, it can be replaced by removing the top portion 10h. With reference to Fig. 6 the apparatus 1 is illustrated in use with a grey water storage tank 14 and other components of a grey water recycling system 2.
The storage tank 14 is configured to store filtered grey water from the filter apparatus 1 . The storage tank 14 is connectable to the first grey water outlet 10b. As illustrated, the filter apparatus 1 is located externally to the storage tank 14. The storage tank 14 may be a cistern for a lavatory.
Alternatively, the storage tank 14 may supply filtered grey water to a cistern for a lavatory. Where the storage tank 14 is connected to a cistern for a lavatory, the storage tank 14 may be, for example, a 70 litre tank.
However, it should be appreciated that the storage tank 14 may have a capacity that is suitable for the required usage.
The storage tank has an outlet 14a which is connectable to a lavatory. The system 2 may include a pump (not illustrated) to pump the filtered grey water to the lavatory. Alternatively, the filtered grey water may be gravity-fed to the lavatory.
The storage tank 14 is also connectable to the drainage system 16. The storage tank 14 has a control valve 14b. The control valve 14b being operable to allow grey water within the storage tank 14 to flow to the drainage system 16. The control valve 14b is a manually-operated valve. The drainage system 16 may be connected to a soil vent pipe, or the like. The storage tank 14 also includes a further water inlet 14c. The further water inlet 14c is configured to allow the storage tank 14 to be filled with water from an external source, such as a source of potable water 14d. The storage tank 14 is also associated with a further control valve 14e. The further control valve 14e being operable to allow water from the further water inlet 14c to enter the storage tank 14, but not to exit. The valve 14e may be a check valve, one-way valve, or the like. The control valve 14e may be an automated valve that is operable to fill the storage tank 14 with water when it detects that the storage tank 14 is empty. The third grey water outlet 10d is also connected to the drainage system 16 via control valve 10d'.
The operation of the filter housing/apparatus 1 and grey water recycling system 2 will now be described.
In an initial condition where there is initially no water in the storage tank 14, grey water from the source of grey water 12 enters the housing 10 via the grey water inlet 10a. The grey water is filtered by the filter element 18 and passes into the storage tank 14 via first grey water outlet 10b. It should be noted that the first filter element 18a may be used to filter larger particles/material than the second filter element 18b. The first filter element 18a is disposable. The second filter element 18b may be removed from the system 2 and cleaned and returned thereto. Typically this involves cleaning the pouch filter 19. Once the storage tank 14 has reached its maximum capacity the water level within the housing 10 will be at a level such that no more grey water can pass through the filter element 18 to the storage tank 14. This is by virtue of the arrangement of the grey water inlet 10a, first grey water outlet 10b and second grey water outlet 10c. Once this happens grey water passes straight from the inlet 10a to the second grey water outlet 10c, and on to the drainage system 16. The grey water thus by passes the filter apparatus 1 without being filtered. This continues to happen until the storage tank 14 reduces its content of grey water.
As described above, the system 2 may feed the filtered grey water in the storage tank 14 to a lavatory via a gravity feed or a pump. The control vale 14e may also operate to fill the storage tank 14 with potable water if there is no supply of grey water to the storage tank 14.
If the alternative embodiment of the filter element 18 is used, once the storage tank 14 it at its maximum capacity the float device 20 raises the disinfectant element 24 (if used) to the position illustrated in Fig. 4a. Here the disinfectant element 24 is above the grey water inlet 10a and the second grey water outlet 10c. In this condition the lifespan of the disinfectant element 24 is increased as it is not submerged in grey water.
The housing 10 is therefore configured such that, in use, grey water may initially flow from the inlet 10a through the filter receiving portion 10m/filter element 18 to the first grey water outlet 10b and then from the inlet 10a to the second grey water outlet 10c. The housing 10 is therefore configured such that, in use, grey water may start to flow from the inlet 10a to the second grey water outlet 10c once grey water can no longer flow through the filter receiving portion 10m/filter element 18 to the first grey water outlet 10b. In order to maintain the apparatus 1 , the lid member 10h may be removed to allow access to the first filter element 18a, float device 20 and disinfectant element 24. The base member 10j may be removed (after draining the housing 10 with control valve 10d') to allow access to the second filter element 18b. The storage tank 14 may also include an access panel 15 that allows access to the storage tank 14 for
maintenance. The filter housing/apparatus 1 of the present invention provides for easy access and maintenance of the system 2. This is partly due to the reason that the filter housing/apparatus 1 is located externally from the storage tank 14. This is also due to the fact that the housing 10 is accessible via the lid member 10h and/or the base member 10j.
The second embodiment of the filter element 18 also provides for an increased lifespan of the disinfectant element 24 since the disinfectant element 24 is capable of being raised out of the flow of grey water between the inlet 10a and the second outlet 10c when the storage tank 14 is at its maximum capacity.
The filter housing/apparatus 1 and system 2 of the present invention provides for simpler maintenance and increased operating lifespan for consumable components, such as disinfectant elements.
Modifications may be made to the foregoing embodiment within the scope of the present invention.

Claims

Claims
1 . A filter apparatus for a grey water recycling system comprising: a housing, the housing comprising:
a grey water inlet;
a first grey water outlet;
a second grey water outlet; and
a filter, the filter being located between the grey water inlet and the first grey water outlet,
wherein the housing is configured such that, in use, grey water may flow from the inlet through the filter to the first grey water outlet, or from the inlet directly to the second grey water outlet.
2. The filter apparatus of claim 1 , wherein the housing has a removable lid member and a removable base member.
3. The filter apparatus of claim 1 or claim 2, wherein the grey water inlet is located above the filter.
4. The filter apparatus of any preceding claim, wherein the first grey water outlet is configured to be connectable to a grey water storage tank.
5. The filter apparatus of any preceding claim, wherein the first grey water outlet is located below the filter and the grey water inlet.
6. The filter apparatus of any preceding claim, wherein the second grey water outlet is configured to allow grey water entering the housing from the grey water inlet to exit the housing without passing through the filter receiving portion/filter.
7. The filter apparatus of any preceding claim, wherein the second grey water outlet is located above the filter.
8. The filter apparatus of any preceding claim, wherein the grey water inlet and the second grey water outlet are located at the same height above the filter receiving portion/filter.
9. The filter apparatus of any preceding claim, wherein the housing further comprises a third grey water outlet, the third grey water outlet being configured to be connectable to a drainage system.
10. The filter apparatus of any preceding claim, wherein the filter includes a first filter and a second filter.
1 1 . The filter apparatus of claim 10, wherein the first filter is configured to substantially block the housing between the grey water inlet and the first grey water outlet, such that grey water cannot pass between the inlet and the outlet without passing through the first filter element.
12. The filter apparatus of claim 10 or claim 1 1 , wherein the first filter is located on a first filter support portion of the housing.
13. The filter apparatus of any preceding claim, wherein the filter includes a disinfectant element.
14. The filter apparatus of claim 13, wherein the housing is configured to receive the disinfectant element in a position above the grey water inlet.
15. The filter apparatus of claim 13 or claim 14, wherein the housing is configured to receive the disinfectant element in a position above the first grey water outlet.
16. The filter apparatus of any of claims 13 to 15, wherein the filter apparatus is configured to allow grey water entering the housing from the grey water inlet to exit the housing without passing through the disinfectant element.
17. The filter apparatus of any of claims 10 to 13, wherein the
disinfectant element is configured to be moveable with respect to the housing, the disinfectant element being configured to be translatable along the longitudinal axis of the housing.
18. The filter apparatus of claim 17, wherein the filter includes one or more float devices, the float devices being operable to move the
disinfectant element within the housing during use.
19. The filter apparatus of claim 18, when dependent upon any of claims 10 to 14, wherein the one or more float devices are located below the first filter.
20. The filter apparatus of claim 18 or claim 19, when dependent upon any of claims 10 to 14, wherein the first filter has a support rod running therethrough, which is connected to the one or more float devices.
21 . The filter apparatus of any of claims 18 to 20, when dependent upon any of claims 10 to 14, wherein the one or more float devices includes a first float device located below the first filter and a second float device located above the filter.
22. The filter apparatus of claim 20 or claim 21 , wherein the one or more float devices are connected to the support rod.
23. The filter apparatus of claim 22, when dependent upon any of claims 17 to 19, wherein the disinfectant element is connected to the support rod.
24. The filter apparatus of claim 23, wherein the disinfectant element is spaced from an upper portion of the first filter.
25. The filter apparatus of claim 24, wherein, in use, the one or more float devices are operable to move the disinfectant element between a first position in which the disinfectant element is located below the grey water inlet and a second position in which the disinfectant element is located above the grey water inlet.
26. The filter apparatus of any of claims 10 to 25, wherein the second filter includes a frame member, the frame member having a plurality of apertures and being configured to house a filter element.
27. The filter apparatus of claim 26, wherein the filter element is a flexible pouch.
28. The filter apparatus of claim 26, wherein the filter element is a coil filter.
29. The filter apparatus of any of claims 10 to 28, wherein the frame member is located on a second filter support portion of the housing, such that the second filter is suspended therefrom.
30. The filter apparatus of any of claims 10 to 29, wherein the second filter is located below the first filter.
31 . The filter apparatus of any preceding claim, wherein the filter apparatus further includes a storage tank, the storage tank being configured to store filtered grey water from the filter apparatus.
32. The filter apparatus of claim 31 , wherein the filter apparatus includes a pump, the pump being operable to pump grey water in the storage tank to another location.
33. The filter apparatus of claim 31 or claim 32, wherein the storage tank is configured to be connectable to a drainage system.
34. The filter apparatus of any of claims 31 to 33, wherein the storage tank includes a further water inlet, the further water inlet being configured to allow the storage tank to be filled with water from an external source.
35. The filter apparatus of claim 34, wherein the storage tank includes a further control valve, the further control valve being operable to allow water from the further water inlet to enter the storage tank, but not to exit.
36. A grey water recycling system comprising:
a filter apparatus comprising:
a housing, the housing comprising:
a grey water inlet;
a first grey water outlet;
a second grey water outlet; and a filter, the filter being located between the grey water inlet and the first grey water outlet,
wherein the housing is configured such that, in use, grey water may flow from the inlet through the filter to the first grey water outlet, or from the inlet directly to the second grey water outlet;
a storage tank, the storage tank being connectable to the first grey water outlet.
37. The grey water recycling system of claim 36, wherein the filter apparatus is located externally to the storage tank.
38. The grey water recycling system of claim 36 or claim 37, wherein the second grey water outlet is configured to by-pass the storage tank.
39. The grey water recycling system of any of claims 36 to 38, wherein the system further comprises a pump, the pump being operable to pump grey water in the storage tank to another location.
40. A filter housing for a grey water recycling system comprising:
a grey water inlet;
a first grey water outlet;
a second grey water outlet; and
a filter receiving portion, the filter receiving portion being located between the grey water inlet and the first grey water outlet,
wherein the housing is configured such that, in use, grey water may flow from the inlet through the filter receiving portion to the first grey water outlet, or from the inlet directly to the second grey water outlet.
PCT/GB2017/050566 2016-03-03 2017-03-02 Filtering apparatus for a grey water recycling system WO2017149314A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17715249.3A EP3423412A1 (en) 2016-03-03 2017-03-02 Filtering apparatus for a grey water recycling system

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GB1603679.0 2016-03-03
GB1603679.0A GB2547922A (en) 2016-03-03 2016-03-03 Improvements in or relating to filtering apparatus

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GB201603679D0 (en) 2016-04-20
EP3423412A1 (en) 2019-01-09

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