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WO2004064978A1 - Systeme de filtration - Google Patents

Systeme de filtration Download PDF

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Publication number
WO2004064978A1
WO2004064978A1 PCT/AU2004/000061 AU2004000061W WO2004064978A1 WO 2004064978 A1 WO2004064978 A1 WO 2004064978A1 AU 2004000061 W AU2004000061 W AU 2004000061W WO 2004064978 A1 WO2004064978 A1 WO 2004064978A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
arrangement
brush
filter membrane
membrane
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/AU2004/000061
Other languages
English (en)
Inventor
Sarah Elizabeth Chenery Lobban
Mark Richard Lobban
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2004064978A1 publication Critical patent/WO2004064978A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/23—Supported filter elements arranged for outward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6407—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes
    • B01D29/6415—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes with a rotary movement with respect to the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/06—Tubular membrane modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/128—Vertical or inclined screw presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/16—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing operating with two or more screws or worms
    • B30B9/163—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing operating with two or more screws or worms working in different chambers
    • 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
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B13/00—Recovery of fats, fatty oils or fatty acids from waste materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/02—Filtering elements having a conical form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/08—Use of hot water or water vapor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/30—Mechanical cleaning, e.g. with brushes or scrapers
    • 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
    • C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
    • C02F1/385—Treatment of water, waste water, or sewage by centrifugal separation by centrifuging suspensions
    • 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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • 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
    • C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
    • C02F2103/322—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters from vegetable oil production, e.g. olive oil production
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/74—Recovery of fats, fatty oils, fatty acids or other fatty substances, e.g. lanolin or waxes

Definitions

  • This invention relates to a device, which is used to extract oils, solids, suspended solids and organic matter from liquids such as wastewater.
  • the invention will be particularly discussed in relation to its application to the treatment of wastewater produced when fruits, foods and beverages are processed but it is not restricted to this application.
  • a liquid waste product is produced containing organic matter including oils, suspended solids and other raw materials and is commonly referred to as wastewater or effluent.
  • One of these systems requires a septic tank system in which heat and accelerant chemicals are added to break down the wastewater and produce compostable matter and methane gases.
  • This system requires a minimum tank capacity of two hundred cubic metres for a standard 2 tonne processing system, mechanical aeration and chemical additives. This limits the capacity and usefulness of the system.
  • This invention provides a system by which oils, solids, suspended solids, organic matter and water can be separated from the wastewater.
  • a further problem which may be addressed by this invention is the shortage of potable water and the necessity of reuse of waste waters.
  • Waters such as sewage and septic tank effluent may be processed by micro-filtration, ultra-filtration and /or reverse osmosis to provide water for reuse.
  • the invention is said to reside in a filter arrangement for liquids containing solids, the filter arrangement including a substantially cylindrical filter membrane having a longitudinal axis, a brush arrangement within the cylindrical filter membrane, the brush arrangement being adapted to be rotated on an axis co- axial with a longitudinal axis of the cylindrical filter membrane, inlet means to supply liquid to be filtered into an inlet of the cylindrical filter membrane and exit means to extract sludge from an exit of the filter membrane and a filtrate exit.
  • the longitudinal axis of the cylindrical filter membrane may be horizontal and in an alternative embodiment the longitudinal axis of the cylindrical filter membrane may be vertical.
  • the cylindrical filter membrane may be parallel sided or may be tapered or frusto- conical and have a taper in the range of 0 to 10 degrees.
  • the filter membrane may be used so that the smaller diameter of the cylindrical filter membrane is at the inlet of the filter arrangement and the larger diameter is at the exit and the brush arrangement is correspondingly tapered or alternatively the filter membrane is used so that the smaller diameter of the cylindrical filter membrane is at the exit of the filter arrangement and the larger diameter is at the inlet and the helical brush arrangement is correspondingly tapered.
  • the filter membrane may have aperture sizes in the filter membrane ranging from about 5,000 microns to about 0.001 microns.
  • the filter membrane may be constructed from perforated metal or alternatively may be constructed from a group selected from a semi-permeable membrane, a synthetic semi-permeable membrane or a ceramic.
  • the housing can include a liquid inlet connected to the inlet means, a sludge outlet connected to the exit means and a filtrate exit pipe connected to the filtrate exit.
  • a vacuum system to apply a vacuum to the filtrate exit.
  • a pressure system to apply pressure to the wastewater at the filtrate inlet.
  • the sludge outlet can include a valve to restrict the outflow of sludge.
  • the valve to restrict the outflow of sludge may include means to intermittently operate the valve. Such intermittent operation may be at regular intervals such as each minute or two minutes or may be activated when load on the motor reaches a certain level indicating a build up of sludge.
  • Vacuum can be applied to the sludge outlet to remove the sludge either continuously or periodically.
  • the vacuum applied may be up to -lOOpsi.
  • the brush arrangement may be mounted on an axle within and co-axial with the longitudinal axis of the cylindrical filter membrane and there can be a drive arrangement such as a direct drive motor or using an indirect pulley or gear system to rotate the brush arrangement.
  • a drive arrangement such as a direct drive motor or using an indirect pulley or gear system to rotate the brush arrangement.
  • the brush arrangement includes a helical brush flight.
  • the helical brush flight comprises a helical brush with bristles of the brush extending so that they are spaced from the cylindrical filter membrane by a distance of from just touching to a 50 mm spacing.
  • the spacing is from 0.2 m to 10 mm.
  • the brush arrangement comprises short bristles mounted onto an auger on the axle.
  • the brush arrangement comprises longer bristles mounted directly onto a carrier on the axle.
  • the brush arrangement may comprise bristles made from a material selected from the group comprising metal fibres, natural fibres, nylon fibres, polypropylene fibres or a composite of metal and polypropylene fibres.
  • the brush arrangement may have bristles which vary in stiffness and size along the length of the brush arrangement.
  • the helical flight can have a helical pitch of between 0.5:1 to 2:1 being the ratio of diameter of the brush to pitch length.
  • the brush arrangement may be rotated in the cylindrical filter membrane such that the helical flights of the brush cause sludge to be moved to the exit with the brush fibres allowing water to flow between the bristles.
  • the brush arrangement can be rotated at speeds of from 60 rpm to 5,000 rpm.
  • the filter arrangement according to the present invention can further include a filter membrane washing arrangement.
  • the filter membrane washing arrangement can be adapted to supply either cold or hot water to clean the filter membrane and the water is supplied in the inlet means or be adapted to supply either cold or hot water to clean the filter membrane and the water is supplied as a spray onto the outside of the screen.
  • the invention resides in a multi stage filter arrangement including a plurality of filter arrangements for filtering liquids containing solids as discussed above wherein the filter arrangements are arranged in series.
  • the multi stage filter arrangement may include gravity feed between the stages or there may be a pump to pump feed and to provide pressurisation between the stages.
  • the multi stage filter arrangement can include a settling tank after the final stage.
  • Such a multi stage filter arrangement can have three stages, a first stage having a filter membrane with a filter aperture size range of from 3000 microns to 1000 microns, a second stage having a filter membrane with a filter aperture size range of from 1000 microns down to 200 microns and third stage having a filter membrane with a filter aperture size range of from 200 microns to 35 microns.
  • the invention resides in a multi stage filter arrangement including a plurality of filter arrangements for filtering liquids containing solids as discussed above wherein the filter arrangements are arranged in parallel.
  • the bristles of the brush help to de-emulsify the olive oil for instance in a plant used for processing of olive oil factory wastewater.
  • the olive oil is carried out in the sludge and can be recovered by centrifuging or other methods.
  • the mechanism of de-emulsifying is not clearly understood but it is believed to relate to the action of the tips of the fibres on the emulsified oil but the applicant is not bound to this explanation.
  • the removal of olive oil from the wastewater has considerable advantage in reducing the BOD of the filtrate so that it can be disposed by conventional means such as discharge into waterways, as sewage, soakage on land, or into the environment in general.
  • the cylindrical filter membrane may have variable aperture size extending from larger apertures at the inlet end of the cylindrical filter membrane to smaller apertures at the exit end of the cylindrical filter membrane.
  • Liquid may be supplied to the inlet means at substantially atmospheric pressure or at a pressure suitable for the filtering process.
  • a settling tank can act as secondary treatment equipment.
  • Other existing tertiary wastewater treatment technologies can be used for downstream refinement and polishing.
  • the sludge from the or each exit means may be passed to a settling tank or to further processing to extract oil or other products.
  • the apparatus according to the present invention may be used for the reprocessing of waste-waters such as sewage and septic tank effluent as well as industrial wastes.
  • the filter membrane may be formed from a very fine pored film or material such as a synthetic polymer membrane.
  • the use of the brush on the inside of the membrane will help to keep the membrane clean and where the brush is a helical brush it will tend to push sludge towards the sludge outlet.
  • the brush bristles preferably do not touch the filter membrane so that wear on the membrane does not occur and there is not excess load on the motor.
  • the brush bristles can, however, set up turbulence which will assist with keeping the filter membrane clear of deposited solids.
  • the sludge at the sludge outlet could be removed at intervals by briefly opening of a solenoid valve in the sludge outlet. At the same time the application of pressure and vacuum, inside and outside the membrane respectively, may be stopped to prevent excess pressure being applied to the outlet. Vacuum assistance for the removal of the sludge may also be used.
  • a first stage being a micro- filtration stage with pore sizes down to 0.1 ⁇ m.
  • a next stage could be an ultra- filtration stage with pore sizes down to 0.01 ⁇ m.
  • a next stage could be a nano- filtration stage with pore sizes down to 0.001 ⁇ m.
  • a final stage could be in effect a reverse osmosis stage with pore sizes down to 0.0001 ⁇ m.
  • the invention is said to reside in a method of filtering waste water including the steps of supplying waste water to a filter system as described above, continuously cleaning the filter membrane using the brush arrangement and withdrawing filtrate from the filtrated exit.
  • the equipment may be constructed from materials suitable for the type of product being processed. For instance, if the materials being processed are food grade products then food grade materials should be used. Materials can include plastics, glass or other fibre reinforced plastics and metals such as stainless steel. Stainless steel may be grade 304 or grade 316 stainless steel. Grade 304 may be used where less corrosion resistance is needed. Grade 316 may be used where corrosion and a stronger material is needed. In unusual environments fibreglass or ceramic glaze may be used to line the internal surface of the housings.
  • Figure 1 shows one example of the wastewater treatment arrangement by which both water and solids can be removed from wastewater according to this invention
  • Figure 2 shows an embodiment of a wastewater treatment apparatus according to the invention
  • Figure 3 shows a filter housing of the embodiment shown in Figure 2;
  • Figure 4 shows a filter membrane of the embodiment shown in Figure 2;
  • Figure 5 shows a typical helical brush arrangement of the embodiment shown in Figure 2;
  • Figure 6 shows an alternative embodiment of a filter system according to the invention;
  • Figure 7A and 7B show a transverse and longitudinal cross section of helical brush arrangement of one embodiment of the invention
  • Figure 8A and 8B show a transverse and longitudinal cross section of helical brush arrangement of an alternative embodiment of the invention.
  • the wastewater treatment arrangement according to this embodiment for removal of oil, water and solids from a wastewater comprises of a series of stainless steel housing cylinders, with cylindrical membrane screens inside each of the housing cylinders. Inside each of the screens is a helical brush attached to a shaft which rotates on the horizontal axis. A cone shaped cyclone separator and a sinuous flow and overflow flow tank come after the separator cylinders.
  • the wastewater from the centrifugal separator is pumped via pump 2 from the separator through a pipe 3 and through into the first housing cylinder 4.
  • a cylindrical membrane screen 5 with a shaft 6 through the centre.
  • the membrane screen 5 comprises a perforated stainless steel cylinder.
  • a helical brush 7 with relatively coarse bristles is mounted onto a carrier which is welded to the shaft 6. Waste water is fed into the interior of the membrane screen 5.
  • the rotating helical brush 7 thickens the oils and solids while pushing the solids through and out the exit pipe 8 and the screened filtrate passes through the membrane screen.
  • Membrane screen 5 is enclosed by a housing cylinder 4, which collects the screened filtrate and channels it down pipe 9 and into the next cylinder 10 of a multistage filtration process.
  • a pump 31 is provided between the first stage and the second stage to pressurise the feed to the second stage.
  • the second rotating helical brush 12 has bristles which are softer but a thicker ply than the first helical brush 7.
  • the rotating helical brush 12 thickens the oils and solids while pushing the solids through and out the exit pipe 13 and the screened filtrate passes through the membrane screen 11.
  • the membrane screen 11 is enclosed by a housing cylinder 10, which collects the screened filtrate and channels it down pipe 14 and into cylinder 15, the next stage in the multistage filtration process.
  • the filtered wastewater enters an even finer mesh membrane screen 16 from pipe 14.
  • the second rotating helical brush 17 has bristles which are still softer but of a similar ply to the second helical brush 12.
  • the rotating helical brush 12 thickens the oils and solids while pushing the solids through and out the exit pipe 18 and the screened filtrate passes through the membrane screen 16.
  • the membrane screen 16 is enclosed by a housing cylinder 15, which collects the fine-screened filtrate and channels it down pipe 19 and into a cyclone separator 20.
  • Filtration in the third stage is assisted by application of a vacuum by vacuum system 32 to the annular space between the membrane screen 16 and housing cylinder 15.
  • Pipe 19 connects to a cone shaped cyclone separator 20 that extracts emulsified fine particulate solids through pipe 21.
  • Water from pipe 21 may discharge into any appropriate further treatment, effluent disposal or re-use system.
  • the remainder of the oil and wastewater is channelled into the sinuous flow and overflow tanks 22.
  • the tank has six chambers 23, 24, 25, 26, 27 and 28. Chamber 23 allows for the skimming off of any remaining solids into a holding tank 29 via pipe 31 and pipe 32 extending from chamber 27 catches the majority of the remaining oil and solids and also skims them off in to a holding tank 29 to be recycled through the separator and at regular intervals the separated olive oil may be collected.
  • Chamber 24 encourages settling by allowing the water to gently overflow into chambers 25, 26 and 27. Any remaining oil is again skimmed of by the naturally occurring overflow mechanism in the last chamber 28.
  • Chamber 28 pipes the treated water out through pipe 30. Pipe 30 can lead into any appropriate further treatment, effluent disposal or re-use system.
  • FIGS. 2 to 5 show more detail of a further embodiment of a filter system for wastewater.
  • Figure 2 shows an assembly of a two-stage filter system.
  • Figure 3 shows the casing for each stage,
  • Figure 4 shows the filter membrane and
  • Figure 5 shows the helical brush.
  • the two stage filter system is mounted on a frame 40 and includes a first stage generally shown as 41 and a second stage generally shown as 42.
  • Each stage 41 and 42 is essentially the same except the size of the apertures in the filter membrane as will be discussed below.
  • the stage 41 has a housing 44 mounted to the frame 40.
  • the housing 44 has a wastewater inlet 45, a sludge outlet 46 and a filtrate outlet 47.
  • a shaft 48 passes through the centre of the housing and is rotated by a motor 49 and gearbox 50.
  • a bearing 72 on one end of the shaft 48 supports the axle in an aperture 74 in the housing 44 and at the other end the shaft is supported in the filter membrane 55 as discussed below.
  • On the shaft 48 is mounted a helical brush assembly 51 and at the inlet end there is a feed auger 39 also mounted onto the shaft 48.
  • the spiral brush 51 is formed with a metal base or carrier 52 into which is received bristles 70 with the metal base 52 being helically wound around and affixed to the shaft 48. It will be noted that in this embodiment the outer periphery of the brush 51 is slightly tapered along the length of the brush so that typically it has a greater diameter at the outlet end 53 than the inlet end 54.
  • a cylindrical and tapering filter membrane 55 which is shown in detail in Figure 5.
  • the filter membrane at the inlet end 56 has a ring seal 57 which fits into the housing 44 at 58.
  • the outlet end of the screen 59 has a seal ring 60 which fits into the housing 44 at 61 and also a bearing member 62 which supports the end 76 of the shaft 48.
  • the clearance of the brush from the screen when it is mounted into the screen is preferably in the range of 0.2 mm up to 50 mm.
  • a water spray system 63 is provided in the housing 44 to spray wash water onto the screen 55 when required.
  • the wash water is hot water.
  • Wastewater is provided to the inlet 45 and the auger 52 moves the wastewater and organic material into the filter where the bristles of the brush 51 cause the organic matter to be moved towards the outlet end 46 and the water through the mesh of the screen 55.
  • the mesh screen may have an aperture diameter of 1 to 3 mm in the first stage. Filtrate from the first stage is passed through outlet 47 into the second stage 42 which is essentially similar to the first stage except that the mesh size of the screen is smaller and the bristles of the brush in the second stage are somewhat softer and less rigid.
  • the mesh screen in the second stage 42 may have an aperture diameter of from 1 mm down to 35 microns.
  • valve arrangement 67 In each of the sludge outlets 46 and 66 there is provided a valve arrangement 67.
  • the valve arrangement 67 is normally closed and can be periodically activated to open it to allow removal of sludge. Activation of the valve 67 can be done at regular intervals such as once per minute for one or two seconds or may be activated when load on the motor driving the rotating brush increases to a selected value indicating build up of sludge in the exit.
  • the sludge from the outlet 46 and outlet 66 can be treated with a centrifuge to remove olive oil before being sent to composting and the filtrate from the outlet 65 can be sent to further processing as discussed earlier or to waste.
  • the sludge from the outlet 46 and outlet 66 can be treated in settling tanks to allow the de-emulsified oil to separate from the solids.
  • Further processing can include the sinuous flow and overflow tanks of the type discussed in relation to Figure 1.
  • the filter system is substantially vertical with the longitudinal axis of the filter membrane and helical brush being vertical.
  • the filter system 80 has a housing 82 with a cap 83 which can be screwed onto the housing.
  • a suitable seal arrangement such as an O-ring is provided between the housing 82 and cap 83.
  • the cap 83 there is an inlet 85 and an outlet 87 for the filter arrangement.
  • the cap also includes an upper bearing 89 for a brush shaft 91.
  • a lower bearing 93 is provided for the lower end of the brush shaft 91 and the lower bearing is mounted in the lower end 85 of the housing 82.
  • a sludge outlet 95 is provided at the lower end 85 of the housing 82.
  • a cylindrical and tapered filter membrane 97 is provided within the housing 82 and its longitudinal axis is concentric with the axle 91.
  • the filter membrane has at its lower end a ring seal 99 which fits into the lower end of the housing 85 at 101 and at the upper end of the cylindrical filter membrane 97, a ring seal 103 fits into a housing 105 which is received in the cap 83.
  • the inlet 85 enters the inside of the filter membrane 97 and the outflow 87 takes liquid from this annular space between the outside of the filter membrane 97 and the main housing 82.
  • On the axle 91 and within the filter membrane 97 is mounted a helical brush arrangement 109. At the lower end of the helical brush, the brush is replaced with a solid auger 111.
  • the brush is rotated by drive pulley 113 on shaft 91 (from a motor, not shown) so that the helical flights drive sludge down towards the sludge outlet 95 and the solid auger portion 111 assists with compacting the sludge.
  • a sensor associated with the motor can activate a valve to open the exit and allow the sludge to be discarded.
  • the valve can be operated at regular intervals such as every minute or two minutes during use to open the valve and release the built up sludge.
  • FIG 7A and 7B show longitudinal and transverse cross-sectional views of one embodiment of a helical brush flight.
  • a brush carrier 122 is welded by means of welds 124 and a number of brush bristles 126 are crimped into the carrier.
  • the brush is crimped into the carrier in a straight line and then the carrier 122 with the bristles mounted into it is wound around the axle 120.
  • the axle 120 has an auger portion 130 wound in a spiral manner onto it and welded by means of welds 132 to the axle 120.
  • a bristle carrier 134 and crimped into the bristle carrier 134 are short bristles 136.
  • the bristles of the helical brush arrangement of the various embodiments do not touch the filter membrane in use but are spaced from it by from 0.2 to 50 millimetres so that extra load is not placed on the motor.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Filtration Of Liquid (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

La présente invention concerne un moyen de filtration (41) destiné à des liquides contenant des matières solides telles que des résidus d'olives. Le filtre comporte une membrane filtrante cylindrique effilée (55), un ensemble brosse hélicoïdale tournante (51) disposé sur un axe (48) à l'intérieur de la membrane, un moyen d'entrée (45) prévu pour envoyer le liquide devant être filtré, dans une extrémité d'entrée de la membrane filtrante cylindrique et un moyen de sortie (46) permettant de libérer les résidus par l'autre extrémité de sortie de la membrane filtrante. L'évasement peut se situer dans une plage comprise entre 0 et 10 degrés. Des poils de la brosse sont espacés de manière appropriée de la membrane filtrante. On peut utiliser de la pression dans la membrane filtrante et du vide à l'extérieur pour faciliter la filtration. L'extraction des résidus peut être continue ou intermittente.
PCT/AU2004/000061 2003-01-21 2004-01-21 Systeme de filtration Ceased WO2004064978A1 (fr)

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AU2003900226A AU2003900226A0 (en) 2003-01-21 2003-01-21 A filter system
AU2003900226 2003-01-21

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Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007038894A1 (fr) * 2005-10-04 2007-04-12 Trunz Water Systems Ag Installation de traitement de l'eau potable independant du lieu
US8201697B2 (en) 2005-08-18 2012-06-19 Dow Global Technologies Llc Hydroclone based fluid filtration system
US8663472B1 (en) 2011-05-06 2014-03-04 Dow Global Technologies Llc Multi-chambered hydroclone
US8882999B2 (en) 2010-06-17 2014-11-11 Dow Global Technologies Llc Cleaning assembly for use in fluid filtration systems
KR101474195B1 (ko) 2014-03-25 2014-12-18 주식회사 휴비스워터 섬유관 필터 및 하이브리드 필터
US8960450B2 (en) 2010-12-08 2015-02-24 Dow Global Technologies Llc Apparatus and method for implementing hydroclone based fluid filtration systems with extensible isolated filter stages
US9050610B2 (en) 2012-05-17 2015-06-09 Dow Global Technologies Llc Hydroclone with inlet flow shield
CN104801197A (zh) * 2015-05-25 2015-07-29 威士邦（厦门）环境科技有限公司 一种管式膜清洗装置
US9101859B2 (en) 2012-06-01 2015-08-11 Dow Global Technologies Llc Cross-flow filtration system including particulate settling zone
WO2015138015A1 (fr) 2014-03-14 2015-09-17 Dow Global Technologies Llc Ensemble filtre à courant transversal à ensemble de nettoyage perfectionné
US9186604B1 (en) 2012-05-31 2015-11-17 Dow Global Technologies Llc Hydroclone with vortex flow barrier
US9192946B2 (en) 2012-10-26 2015-11-24 Dow Global Technologies Llc Hydroclone
US9527091B2 (en) 2013-12-05 2016-12-27 Dow Global Technologies Llc Hydroclone with improved cleaning assembly
PT108658A (pt) * 2015-07-02 2017-01-02 Rauschert Portuguesa Sa Processo de reciclagem e reutilização de efluentes líquidos da extracção do azeite.
RU2628632C2 (ru) * 2015-12-08 2017-08-21 Публичное акционерное Общество "Таганрогский авиационный научно-технический комплекс им. Г.М. Бериева" (ПАО "ТАНТК им. Г.М. Бериева") Устройство удаления воздуха из водовоздушной струи, поступающей при заборе воды на глиссировании самолета-амфибии
US20170282100A1 (en) * 2017-06-15 2017-10-05 Xi'an Jiaotong University Spiral seal continuous discharge filter for supercritical water treatment process
CN107311249A (zh) * 2017-08-10 2017-11-03 惠州秀鸿科技有限公司 一种污水处理装置
CN108379890A (zh) * 2018-03-19 2018-08-10 冷应杰 一种废水过滤处理设备
US10207205B2 (en) 2014-12-18 2019-02-19 Dow Global Technologies Llc Cylindrical filter screen with tensioning mechanism
CN110075592A (zh) * 2019-05-31 2019-08-02 威海沁和实业有限公司 螺旋过滤洗涤机
WO2020150477A1 (fr) * 2019-01-16 2020-07-23 Carew E Bayne Extraction continue de produits naturels à partir d'appareils et de procédés de plantes
CN111974058A (zh) * 2020-08-06 2020-11-24 张文勇 一种水利工程用输送水源过滤装置及过滤方法
CN112807836A (zh) * 2021-02-07 2021-05-18 徐州优力特回转支承制造有限公司 一种管式送料泥水分离的环保处理装置
CN113577878A (zh) * 2021-08-18 2021-11-02 鞍山市胜誉净化环保科技有限公司 一种环套滤芯净水器
CN115318105A (zh) * 2022-06-29 2022-11-11 星达（泰州）膜科技有限公司 一种超滤膜过滤装置
WO2022263250A3 (fr) * 2021-06-15 2023-02-09 Hengst Se Filtre à microplastique pour lave-linge
CN115947417A (zh) * 2023-02-28 2023-04-11 佛山市绿田环保机械设备有限公司 一种具有多级过滤功能的污水处理装置及其使用方法
WO2024226495A1 (fr) * 2023-04-24 2024-10-31 Accelerated Filtration, Inc. Noyau de filtre
CN118998118A (zh) * 2024-10-22 2024-11-22 陕西航天德林科技集团有限公司 一种油气井井下增压装置
US12220669B2 (en) 2018-07-27 2025-02-11 Accelerated Filtration, Inc. Filter screen

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Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8201697B2 (en) 2005-08-18 2012-06-19 Dow Global Technologies Llc Hydroclone based fluid filtration system
US8701896B2 (en) 2005-08-18 2014-04-22 Dow Global Technologies Llc Hydroclone based fluid filtration system
WO2007038894A1 (fr) * 2005-10-04 2007-04-12 Trunz Water Systems Ag Installation de traitement de l'eau potable independant du lieu
US8882999B2 (en) 2010-06-17 2014-11-11 Dow Global Technologies Llc Cleaning assembly for use in fluid filtration systems
US8960450B2 (en) 2010-12-08 2015-02-24 Dow Global Technologies Llc Apparatus and method for implementing hydroclone based fluid filtration systems with extensible isolated filter stages
US8663472B1 (en) 2011-05-06 2014-03-04 Dow Global Technologies Llc Multi-chambered hydroclone
US9050610B2 (en) 2012-05-17 2015-06-09 Dow Global Technologies Llc Hydroclone with inlet flow shield
US9186604B1 (en) 2012-05-31 2015-11-17 Dow Global Technologies Llc Hydroclone with vortex flow barrier
US9101859B2 (en) 2012-06-01 2015-08-11 Dow Global Technologies Llc Cross-flow filtration system including particulate settling zone
US9192946B2 (en) 2012-10-26 2015-11-24 Dow Global Technologies Llc Hydroclone
US9527091B2 (en) 2013-12-05 2016-12-27 Dow Global Technologies Llc Hydroclone with improved cleaning assembly
WO2015138015A1 (fr) 2014-03-14 2015-09-17 Dow Global Technologies Llc Ensemble filtre à courant transversal à ensemble de nettoyage perfectionné
KR101474195B1 (ko) 2014-03-25 2014-12-18 주식회사 휴비스워터 섬유관 필터 및 하이브리드 필터
US10207205B2 (en) 2014-12-18 2019-02-19 Dow Global Technologies Llc Cylindrical filter screen with tensioning mechanism
CN104801197A (zh) * 2015-05-25 2015-07-29 威士邦（厦门）环境科技有限公司 一种管式膜清洗装置
PT108658A (pt) * 2015-07-02 2017-01-02 Rauschert Portuguesa Sa Processo de reciclagem e reutilização de efluentes líquidos da extracção do azeite.
PT108658B (pt) * 2015-07-02 2019-02-26 Rauschert Portuguesa Sa Processo de reciclagem e reutilização de efluente liquído da extracção do azeite
RU2628632C2 (ru) * 2015-12-08 2017-08-21 Публичное акционерное Общество "Таганрогский авиационный научно-технический комплекс им. Г.М. Бериева" (ПАО "ТАНТК им. Г.М. Бериева") Устройство удаления воздуха из водовоздушной струи, поступающей при заборе воды на глиссировании самолета-амфибии
US20170282100A1 (en) * 2017-06-15 2017-10-05 Xi'an Jiaotong University Spiral seal continuous discharge filter for supercritical water treatment process
CN107311249B (zh) * 2017-08-10 2018-05-18 东莞市石鼓污水处理有限公司 一种污水处理装置
CN107311249A (zh) * 2017-08-10 2017-11-03 惠州秀鸿科技有限公司 一种污水处理装置
CN108379890B (zh) * 2018-03-19 2020-06-26 浙江华岛环保设备有限公司 一种废水过滤处理设备
CN108379890A (zh) * 2018-03-19 2018-08-10 冷应杰 一种废水过滤处理设备
US12220669B2 (en) 2018-07-27 2025-02-11 Accelerated Filtration, Inc. Filter screen
WO2020150477A1 (fr) * 2019-01-16 2020-07-23 Carew E Bayne Extraction continue de produits naturels à partir d'appareils et de procédés de plantes
CN110075592A (zh) * 2019-05-31 2019-08-02 威海沁和实业有限公司 螺旋过滤洗涤机
CN111974058A (zh) * 2020-08-06 2020-11-24 张文勇 一种水利工程用输送水源过滤装置及过滤方法
CN112807836A (zh) * 2021-02-07 2021-05-18 徐州优力特回转支承制造有限公司 一种管式送料泥水分离的环保处理装置
WO2022263250A3 (fr) * 2021-06-15 2023-02-09 Hengst Se Filtre à microplastique pour lave-linge
CN113577878A (zh) * 2021-08-18 2021-11-02 鞍山市胜誉净化环保科技有限公司 一种环套滤芯净水器
CN115318105A (zh) * 2022-06-29 2022-11-11 星达（泰州）膜科技有限公司 一种超滤膜过滤装置
CN115947417A (zh) * 2023-02-28 2023-04-11 佛山市绿田环保机械设备有限公司 一种具有多级过滤功能的污水处理装置及其使用方法
WO2024226495A1 (fr) * 2023-04-24 2024-10-31 Accelerated Filtration, Inc. Noyau de filtre
CN118998118A (zh) * 2024-10-22 2024-11-22 陕西航天德林科技集团有限公司 一种油气井井下增压装置

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