WO2022013531A2 - Appareil et procédé de traitement de l'eau - Google Patents

Appareil et procédé de traitement de l'eau Download PDF

Info

Publication number
WO2022013531A2
WO2022013531A2 PCT/GB2021/051776 GB2021051776W WO2022013531A2 WO 2022013531 A2 WO2022013531 A2 WO 2022013531A2 GB 2021051776 W GB2021051776 W GB 2021051776W WO 2022013531 A2 WO2022013531 A2 WO 2022013531A2
Authority
WO
WIPO (PCT)
Prior art keywords
water treatment
treatment apparatus
chamber
solids
compressor
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/GB2021/051776
Other languages
English (en)
Other versions
WO2022013531A3 (fr
Inventor
Sandy BEVERIDGE
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.)
SEM Energy Ltd
Original Assignee
SEM Energy Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SEM Energy Ltd filed Critical SEM Energy Ltd
Publication of WO2022013531A2 publication Critical patent/WO2022013531A2/fr
Publication of WO2022013531A3 publication Critical patent/WO2022013531A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
    • 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
    • B30B9/121—Screw constructions
    • 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
    • B01D29/01—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 flat filtering elements
    • B01D29/05—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 flat filtering elements supported
    • 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
    • B01D29/31—Self-supporting filtering elements
    • B01D29/35—Self-supporting filtering 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
    • B01D29/62—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
    • B01D29/6438—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
    • B01D33/463—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
    • B01D33/466—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/18—Heating or cooling the filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/34—Heating or cooling presses or parts thereof
    • 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
    • B30B9/14—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 only one screw or worm
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/125—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/126—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using drum filters
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/18—Treatment of sludge; Devices therefor by thermal conditioning
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/32—Hydrocarbons, e.g. oil
    • C02F2101/325—Emulsions
    • 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
    • C02F2303/02—Odour removal or prevention of malodour
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2307/00—Location of water treatment or water treatment device
    • C02F2307/08—Treatment of wastewater in the sewer, e.g. to reduce grease, odour

Definitions

  • the present invention relates to water purifiers, remediators and waste collection apparatus, especially those used in a food waste environment, such as water run-off from food preparation areas and facilities.
  • Wastewater from food preparation will usually contain a mixture of primary or large solids, micro-solids and “FOGs” (Fats, Oils and Greases). If simply flushed into the sewage system, these elements may coagulate, or even solidify in pipes and cause blockages. Such blockages may cause tremendous damage and be expensive and time-consuming to clear.
  • FOGs Foods, Oils and Greases
  • Solidification of FOGs in the formation of blockages is dependent on a number of factors including:
  • FOG blockage problems are intensified in areas where commercial food service premises dominate, however domestic sources do still contribute significantly, particularly during certain times of year when food forms a major part of festival celebrations.
  • Primary solid contaminants such as:
  • AD Anaerobic digestion
  • biogas production use captured contaminants as feedstock for biogas production, a renewable energy source.
  • This application is particularly suited to primary solids and micro-solids.
  • FOG FOG’s can be successfully digested too, however care must be taken as high FOG loading can be inhibitory to methane production.
  • An added benefit of AD is that the solid by-product (digestate) is highly nutrient rich and can itself be utilised as a fertilising agent to enhance crop growth with some post processing;
  • Biodiesel production is produced from several sources including vegetable / plant oils produced from non edible crops and animal fats.
  • vegetable / plant oils produced from non edible crops and animal fats.
  • biodiesel is produced from several sources including vegetable / plant oils produced from non edible crops and animal fats.
  • biodiesel is produced from several sources including vegetable / plant oils produced from non edible crops and animal fats.
  • there has been growing concern recently regarding the sustainability of using arable crops for this purpose largely centred around its effects on natural habitat, increasing competition with food crops and carbon footprint linked to the energy required for plant growth (ploughing, harvesting etc). Accordingly, alternatives have been sought.
  • Biodiesel production from waste oils and fat has been found to be economically feasible (largely due to low cost acquisition), environmentally sound and carbon negative by numerous studies. It also provides savings in wastewater treatment and disposal costs.
  • Grease traps are permanent in-floor and/or subsurface installations integrated with a buildings drainage system. Such types of construction are typically costly, difficult to service and require regular specialized collection services since each grease trap may only hold a finite amount.
  • Grease traps ideally require upstream strainer installation to prevent carry-over of primary solids in the effluent (i.e. bone fragments, peelings etc). These strainers require manual servicing / emptying on a regular basis which is messy and time consuming. Failure to do so will result in system blockage and potential flooding.
  • Grease recovered from a grease trap will often contain significant amounts of water and biological detergents / sanitisers / surfactants / smell reduction agents.
  • water treatment apparatus comprising a fluid inlet, a compressor provided within a compressor chamber, a skim chamber provided adjacent the compressor chamber, a skimmer provided within the skim chamber, one or more fluid conduits to enable fluid to pass from the compressor chamber to the skim chamber, and a micro solids capture assembly.
  • the apparatus may therefore comprise three discrete sections or modules: a primary solids removal section; a FOG removal section; and a micro-solids removal section.
  • Water passes into the apparatus and firstly into the primary solids removal section i.e. the compressor chamber.
  • Water passes into the apparatus via the fluid inlet where it is initially received and compressed by the compressor.
  • the compressor may be an auger-type compressor.
  • the compressor may have an auger screw, comprising a central shank surrounded by an auger flight.
  • the auger screw may be rotatable.
  • the auger screw may be driven by an electric motor.
  • the compressor chamber may comprise a static cylindrical filter screen.
  • the cylindrical filter screen may be a perforated filter screen.
  • the cylindrical filter screen may be a wire screen.
  • the cylindrical filter screen may be a wedge wire screen.
  • the auger shank may have a cross-sectional diameter and this cross-sectional diameter may be non-uniform along the length of the shank.
  • the diameter of the auger shank may be tapered and increase in diameter from a first diameter adjacent the fluid inlet to a second diameter at a distal end of the shank.
  • the auger flight may have a discontinuous section.
  • the discontinuous section may include one or more slots extending from adjacent the shank to the flight tip.
  • the discontinuous section may be provided adjacent the fluid inlet.
  • the discontinuous section may be provided around at least one auger scroll.
  • the discontinuous section may comprise up to four auger scrolls or around 25-30% of the auger flight.
  • the cylindrical filter screen may include a primary solids outlet at the opposite end to the fluid inlet.
  • the primary solids bin may be provided with a collection bag.
  • the collection bag may be bio-degradable and / or digestible.
  • the collection bag may have a self-sealing valve.
  • a compressor heater may surround the compressor.
  • the compressor heater may comprise a piped radiator assembly.
  • the compressor heater may be fed by an exterior air source heat pump.
  • the compressor heater may be fed by other means i.e. thermal fluid boiler.
  • the compressor heater may mitigate coagulation or solidification of entrained FOGs.
  • the discontinuous section may comprise three and a half auger scrolls.
  • Water may then pass from the primary solids removal section i.e. the compressor chamber to the skim chamber i.e. the FOG removal section.
  • a grating may be provided between the compressor chamber and the skim chamber.
  • the water may pass through the grating.
  • the grating may act as a filter.
  • the grating may act as a flow straightener.
  • the skim chamber may be provided with a lower sump portion.
  • the skim chamber may be provided with a skim chamber heater.
  • the skim chamber heater may be a piped radiator assembly.
  • the skim chamber heater may be fed by an exterior air source heat pump.
  • the air source heat pump may feed both the compressor housing heater and the skim chamber heater.
  • the compressor heater and the skim chamber heater may be fed by other means i.e. thermal fluid boiler.
  • the skim chamber heater may share the exterior heat pump of the compressor heater.
  • the compressor heater may mitigate coagulation or solidification of entrained FOGs.
  • a skimmer mechanism may be provided within the skim chamber.
  • the skimmer mechanism may include a rotating drum.
  • the skimmer mechanism may include a drum scraper.
  • the rotating drum may be a sealed drum such that it has buoyancy when liquids are present in the skim chamber.
  • the drum / skimmer assembly may be mounted such that it can move vertically in response to changes in liquid level in the skim chamber, due to the resulting buoyancy force.
  • the skimmer mechanism may include a FOGs reservoir.
  • the skimmer mechanism may include a FOGs conduit.
  • the FOGs conduit may allow FOGs to be transported from the drum/drum scraper to the FOGs reservoir.
  • FOGs bin There may be provided a FOGs bin.
  • the FOGs bin may be connected to the FOGs reservoir by a second FOGS conduit.
  • the FOGs bin may be provided with a collection bag.
  • the collection bag may be biodegradable.
  • the collection bag may be digestible.
  • the collection bag may have a self-sealing valve.
  • the FOGs may be lifted from the upper surface of water/effluent pooling in the skim chamber and transported to the micro-solids capture assembly.
  • the micro-solids capture assembly may comprise a chamber or tank with one or more spray nozzles, and one or more screen filters traversing at least part of the chamber or tank, wherein water is projected from the one or more spray nozzles towards the one or more screen filters.
  • the screen filter may divide the chamber or tank into an upper header portion and a lower sump or fluid collection portion.
  • the screen filters may have a filter size suitable to remove the desired size of micro-solids.
  • the screen filter may be attached at an angle to the horizontal.
  • This angle may be between 15° and 30°.
  • the screen filter may have an upper or first edge and a lower or second edge.
  • the upper edge may be located adjacent the one or more nozzles.
  • a micro-solids capture bin may be located adjacent the lower edge.
  • the tank may be provided with an exit slot between the lower edge and the micro-solids capture bin.
  • a micro-solids collection chamber may be located between the slot and the screen(s).
  • micro-solids collection chambers There may be provided a plurality of micro-solids collection chambers.
  • the micro-solids collection chamber(s) may comprise a cylindrical or semi-cylindrical housing, a central axle, and one or more paddle bodies extending from the axle towards the cylindrical housing.
  • the paddle bodies may be perforated, and mesh covered to allow excess water to drain into the sump.
  • the paddle bodies may be constructed from wire mesh to allow excess water to drain into the sump.
  • the paddle bodies may be constructed from wedge wire to allow excess water to drain into the sump.
  • the central axle may be rotatable.
  • a stepper motor may provide rotation of the central axle.
  • micro-solids collection manifold between the exit slot and the bin.
  • the micro-solids bin may be provided with a collection bag.
  • the collection bag may be bio-degradable and / or digestible.
  • the collection bag may have a self-sealing valve.
  • a method of water treatment comprising the steps of:
  • Optional features of the first aspect may apply to the second aspect mutatis mutandis.
  • Fig. 1 is a schematic view of a first embodiment apparatus and method according to the present invention
  • Fig. 2 is a perspective view of a first embodiment apparatus according to the present invention
  • Fig. 3 is a partially transparent end elevation of the apparatus of Fig. 2;
  • Fig. 4 is a partially transparent side elevation of the apparatus of Fig. 2;
  • Fig. 5 is a partially transparent end elevation of the apparatus of Fig. 2;
  • Fig. 6 is a partially transparent plan view of the apparatus of Fig. 2;
  • Fig. 7 is a partially transparent perspective view of the apparatus of Fig. 2;
  • Fig. 8 is a further partially transparent perspective view of the apparatus of Fig. 2;
  • Fig. 9 is a partially transparent perspective detail view of the bagging assembly of the apparatus of Fig. 2;
  • Fig. 10 is a part-sectional plan detail view of an auger compressor of the apparatus of Fig. 2;
  • Fig. 11 is a further part-sectional plan detail view of the auger compressor of the apparatus of Fig. 2;
  • Fig. 12 is a partially transparent perspective detail view of a second and third module of the apparatus of Fig. 2;
  • Fig. 13 is a partially transparent plan detail view of a third module of the apparatus of Fig. 2;
  • Fig. 14 is a partially transparent end detail elevation of a third module of the apparatus of Fig. 2;
  • Fig. 15 is a partially transparent perspective detail view of a micro-solids removal module of the apparatus of Fig. 2;
  • Fig. 16 is a partially transparent side elevation of the apparatus of Fig. 2;
  • Fig. 17 is a partially transparent side elevation of a second embodiment apparatus according to the present invention.
  • Fig. 18 is a further partially transparent side elevation of the second embodiment apparatus of Fig 17.
  • the method commences with the step of receiving a quantity of water which may contain one or more contaminants which may include mixture of primary or large solids, micro-solids and “FOGs” (Fats, Oils and Greases).
  • the primary or large solids may be, for example, vegetable peelings and so forth.
  • the apparatus generally referred to as 10 in the drawings, includes a fluid inlet 12 which leads to a fluid compressor 14.
  • the fluid compressor 14 comprises an auger screw 16 which is rotatable within a compressor body 18.
  • the embodiment depicted is approximately 1000mm in length, 550mm in width and 700mm in height.
  • the fluid inlet 12 is fed by an inlet pipe 11.
  • a flow control valve 13 is provided upstream of the inlet pipe 11, the flow control valve 13 being fed from a wastewater supply pipe 15.
  • This wastewater supply pipe 15 may collect effluent from several sinks or other sources within a kitchen environment and direct it towards the apparatus 10.
  • the flow control valve 13 is an electronically activated one, allowing to switch between directing effluent flow towards the apparatus, or through a bypass pipe 17.
  • the bypass pipe 17 allows flow to be directed straight towards a drain or other bypass location should, for example, maintenance or cleaning of the apparatus be necessary.
  • the inlet pipe 11, wastewater supply pipe 15 and bypass pipe 17 are all standard domestic grade pipe, which may either be plastic or metallic.
  • the compressor body 18 is formed from a wire screen material, in this particular embodiment, a TEFLON® coated cylindrical wound wedge wire screen 20 is used to form the compressor body 18.
  • the wedge wire screen 20 has a slot width of around 250 to 500 microns in the present embodiment, but may be varied as required.
  • An auger drive unit 19 is provided on the exterior of the apparatus adjacent the fluid inlet 12.
  • the auger drive unit 19 comprises an electric motor 19a attached to the auger screw 16.
  • a back-pressure sensor 19b is also provided which actuates the motor 19a upon sensing a set level of back-pressure at the fluid inlet 12.
  • the drive unit 19 is intended to provide a relatively slow, stepwise rotation of the auger screw 16 as effluent enters the apparatus 10. Of course, the actual speed will vary depending on the amount of the effluent entering the system and the back pressure at the fluid inlet 12 being monitored.
  • the drive unit 19 provides a constant torque and drive with a typical speed of between 1 and 5 RPM.
  • a compressor chamber 22 is provided within the body 24 of the apparatus 10 to house the compressor 14.
  • a heating coil 26 is provided within the compressor chamber 22 and which surrounds the compressor 14. The heating coil 26 maintains the compressor 14 at a temperature which lowers the viscosity of the effluent being treated and mitigates the FOGs from congealing/solidifying.
  • a heat pump unit 27 is provided which is attached to the exterior of the apparatus 10 which powers the heating coil 26.
  • the heating coil 26 contains a suitable working fluid and maintains the temperature around the compressor 14 in the 40-50°C range, warm enough to enable the FOGs to remain substantially liquid and/or have a lower viscosity.
  • the auger screw 16 comprises a central stem 28 and an auger flight 30 surrounding the central stem 28.
  • the central stem 28 has a taper, increasing in diameter along the length of the auger screw 16 (measured from the fluid inlet 12). This tapering increases the degree of compression of the fluid/effluent entrained within the compressor 14.
  • One or more slots 32 are provided on the auger flight 30.
  • the slots 32 are placed at the initial section of auger flight 30 adjacent the fluid inlet 12.
  • the slots 32 mitigate back pressure and improve initial transport across the auger flight 30 of bulk solids at the initial portion of the auger screw 16.
  • a primary solids outlet 34 and a compression baffle 36 are located at the distal end of the compressor 14 from the fluid inlet 12.
  • a primary solids container 38 is provided adjacent and below the primary solids outlet 34 and compression baffle 36.
  • a primary solids conduit 40 connects the baffle 36 to the container 38.
  • the primary solids conduit 40 channels the primary solids to the container 38.
  • the container 38 and conduit 40 are formed from metal sheeting.
  • One or more bags 42 are provided within the container 38 into which the primary solids are collected.
  • the collection bags 42 have a bifurcated entry valve which self-seals once a sufficient quantity of primary solids have collected.
  • the bags 42 are formed from a digestible, compostable and/or biodegradable material, such that they may be more easily or usefully disposed of (the primary solids representing a significant energy potential for biofuel, compost etc). This may be a suitable bioplastic, cellulose- based or algae-based material.
  • the bags 42 are replaced once full and may be collected for disposal and being formed from a compostable / biodegradable and / or digestible material provide a convenient way of collection and replacement.
  • a bag change mechanism (not shown) is provided.
  • the bag change mechanism monitors the level of FOGs within a bag 42 being fed from the outlet conduit 40. This may be by weight of the bag 42, opacity or some other known form of assessing the fill level. Once a set level has been reached the bag change mechanism may move the filled bag 42 away from the conduit 40 and move another bag 42 into place.
  • the micro-solids bin 38 may provide a storage magazine of such bags 42 for periodic collection.
  • a spray bar assembly 37 is provided within the compressor chamber 22. This comprises a spar pipe 39 extending parallel to the auger 16. Water jets 41 are provided on the spar pipe 39.
  • the spar pipe 39 is pressurised by a supply of water. This may be fresh mains water or purified water from the apparatus 10 output.
  • This process may be automated, such that once a bag 42 is filled, it may be replaced with an empty bag for further solids collection.
  • a central tank 44 is located adjacent the compressor chamber 22 and occupies the central portion of the apparatus 10.
  • a compressor sidewall 46 forms the boundary between the central tank 44 and the compressor chamber 22. The lower portion of the compressor chamber 22 is higher than the lower portion of the central tank 44.
  • the compressor sidewall 46 includes an overflow slot 48 adjacent its uppermost edge.
  • a perforated flow straightener section 50 occupies the central and lower portions of the compressor sidewall 46.
  • the perforated flow straightener section 50 accounts for around 50-70% of the total area of the compressor sidewall 46 and comprises a plurality of horizontal slots or perforations of approximately 10mm width / diameter
  • Effluent pooling in the compressor chamber 22 passes through the perforated flow straightener section 50 with any entrained solids larger than the perforation size being filtered and retained within the compressor chamber 22.
  • a compressor chamber drain 22a is provided for these to be removed once a certain level has been reached.
  • a pressed sump section 52 is provided on the floor of the central tank 44 accounting for around 25% of the floor area and being located distally from the perforated section 54.
  • the pressed sump section 52 has two sloped sections and a central flat portion and is located adjacent a distal corner 44a of the central tank 44.
  • the pressed sump section 52 comprises a sloped transition section 53 adjoining to the remainder of the central tank floor plate 55 and a lower most sump section 57. This may encourage settlement of micro-solids within the lower most sump section 57.
  • the perforated flow straightener section 50 reduces the turbulence in the effluent flow and assists the FOGs in floating to the surface of the effluent pooling within the central tank 44, whilst the micro-solids sink to the base of the central tank 44 and towards the pressed sump section 52.
  • An effluent heating coil 54 is provided within the central tank 44.
  • the effluent heating coil 54 is in the same heating circuit as the heating coil 26 and is powered by the heat pump unit 27.
  • the effluent heating coil 54 also maintains the temperature within the central tank 44 in the 40-50°C range, warm enough to enable the FOGs to remain substantially liquid, and thereby tend to collect upon the upper volume of the entrained effluent.
  • a skimmer mechanism 56 is provided within the central tank 44.
  • a drum type skimmer mechanism 56 is provided in the presently described embodiment. This comprises a cylindrical drum 58 mounted upon a rotating axle 60. The outer surface 62 of the cylindrical drum 58 is rotatable and generally clockwise from the perspective of Fig. 16. This is generally the outer surface 62 rotating such that the upstream portion is surfacing to drag FOGs from the upper layer of the pooling effluent.
  • a skimmer mechanism drive mechanism 64 is provided to urge the skimmer mechanism 56 to draw FOGs from the effluent surface by rotating.
  • a FOGs level sensor 66 may be provided to measure the surface of the effluent and sense where an optimum skimmable level of FOGs is present and provide a control signal to activate the skimmer mechanism 56.
  • the outer surface 62 of the skimmer mechanism 56 may be provided with an adherent surface to improve the adhesion of the FOGs to the skimmer mechanism 56. This may be a coating, a roughening or knurling of the surface, or a combination of such features.
  • the central tank 44 functions as a skim chamber, within which the effluent filtered of its primary solids and certain larger micro-solids retained within the compression chamber 22 is skimmed by the skimmer mechanism to remove floating FOGs.
  • a spray bar assembly 67 is provided within the central tank 44. This comprises a spar pipe 68 extending parallel to the central rotating axle 60 of the skimmer mechanism 56. Water jets 70 are provided on the spar pipe 68.
  • the spar pipe 68 is pressurised by a supply of water. This may be fresh mains water or purified water from the apparatus 10 output.
  • filter jets 72 and drum jets 74 There are filter jets 72 and drum jets 74.
  • the filter jets 72 are orientated such that their nozzles 72a are directed towards the flow straightener/filter grating 50.
  • the drum jets 74 are orientated such that their nozzles 74a are orientated towards the skimmer mechanism 56.
  • the filter jets 72 and drum jets 74 are spade jets in the present embodiment, although it will be understood by the skilled addressee that alternative jets are usable in alternative embodiments.
  • the water jets 70 act as cleaning jets 70 and may be activated in a cleaning cycle or during operation to wash the surfaces of the grating and/or skimmer to enable more optimal performance or to clean the apparatus 10.
  • a central tank drain 76 is provided adjacent the pressed sump section 52.
  • the central tank drain 76 is a simple valved pipe outlet with a threaded section to enable connections of a hose or similar to assist in the draining process.
  • a drum scraper 78 is located adjacent the drum 58.
  • the drum scraper 78 is located distally from the point on the drum 58 where it emerges from the effluent, being approximately 120 to 180° from that point (depending on effluent level).
  • the drum scraper 78 comprises a mounting plate 80 which is joined to and projects from the sidewall of the central tank 44 (the sidewall located distally from the compressor chamber 22) and a resilient blade 82.
  • the resilient blade 82 is formed from a rubber material.
  • the drum scraper 78 projects towards the drum 58 at an angle to the horizontal of approximately 5 to 10°.
  • a blade bracket 84 allows attachment of the blade 82 to the mounting plate 80.
  • the mounting plate 80 has a raised border 86 around the three sides not having the blade 82. The raised border 86 progressively increases in height from the blade bracket 84 along the sides perpendicular to the blade 82, with the border 86 being uniform along the distal sidewall.
  • FOGs are scraped from the surface of the drum 58 by the blade 82 and then flow down the mounting plate 80 with the raised border 86 entraining the FOGs and preventing them falling back into the effluent pool.
  • a FOGs aperture 88 is provided on the raised border 86, on the section of raised border 86 on the distal sidewall.
  • a FOGs collection pipe 90 attaches to the FOG aperture 88 and collects FOGs as they collect at the base of the mounting plate 80.
  • the FOGs collection pipe 90, aperture 88 and the mounting plate 80 may act as a FOGs conduit, allowing transport of the FOGs away from the drum 58
  • a FOGs reservoir 92 is provided at the exit of the FOGs collection pipe 90.
  • the FOGs reservoir 92 is a casing 94 with an internal chamber 96 provided on the interior of the apparatus (although it may also be mounted outside the apparatus casing).
  • a FOGs reservoir inlet aperture 98 is provided to allow the FOGs collection pipe 90 to flow into the internal chamber 96. This is provided on the upper portion of the FOGs reservoir.
  • the internal chamber 96 is sealed such that the odour of the FOGs is largely retained within the chamber 96. FOGs skimmed from the effluent pool within the FOGs reservoir 92.
  • a FOGs outlet conduit 100 is provided adjacent the base of the FOGs reservoir 92 which allows FOGs to be removed from the reservoir 92. Being at the base of the reservoir and unheated, the FOGs may have congealed or solidified into a more viscous state.
  • a FOGs bin 102 is provided on the exterior of the apparatus 10 adjacent the distal corner from the fluid inlet 12.
  • the FOGs bin may be a simple reservoir for FOGs which may be periodically removed and emptied.
  • One or more FOGs collection bags 104 are provided within the FOGs bin 102 in the present embodiment.
  • the FOGs collection bags 104 have a bifurcated entry valve which self-seals once a sufficient quantity of FOGs have collected.
  • the bags 104 are formed from a digestible, compostable and/or biodegradable material, such that they may be more easily or usefully disposed of (the FOGs representing a significant energy potential for biofuel, animal feed etc). This may be a suitable bioplastic, cellulose-based or algae-based material.
  • a bag change mechanism (not shown) is provided.
  • the bag change mechanism monitors the level of FOGs within a bag 104 being fed from the outlet conduit 100. This may be by weight of the bag 104, opacity or some other known form of assessing the fill level. Once a set level has been reached the bag change mechanism may move the filled bag 104 away from the conduit 100 and move an bag 104 into place.
  • the FOGs bin 102 may provide a storage magazine of such bags 104 for periodic collection.
  • Afoot collection valve 106 and skim chamber outlet conduit 108 are provided within the base of the skim chamber 44.
  • the foot collection valve 106 is located on the opposite distal corner from the sump 52, thereby being located away from both the sump 52 itself and the grating 50. This helps mitigate unintentional collection of larger micro-solids collecting in the sump 52 and FOGs.
  • a skim effluent pump 110 pumps the effluent from the skim chamber 44 along the conduit 108.
  • a micro-solids capture assembly 112 is fed by the skim chamber outlet conduit 108.
  • a capture assembly housing 114 is provided adjacent the skim chamber 48.
  • the FOGs reservoir 96 is located within the capture assembly housing 114.
  • the FOGs bin 102 is mounted on the exterior of the capture assembly housing 114.
  • the micro-solids capture assembly 112 comprises a capture water inlet 116 fed from the skim chamber outlet conduit 108.
  • An elongate spray bar nozzle 118 is fed from the water inlet 116 which spreads out the water/effluent into a broad spray of water.
  • the elongate spray bar nozzle 118 comprises a lip of pressed steel with suitable apertures formed in the lowermost portion.
  • the elongate spray bar nozzle 118 is located towards the upper portion or header of the capture assembly housing 114.
  • a screen filter 120 is located within the capture assembly housing 114.
  • the screen filter 120 is affixed across the centre of the capture assembly housing 114.
  • the screen filter 120 is a planar screen of filter media and is affixed at an angle within the capture assembly housing 114.
  • the screen filter 120 is affixed with its centre approximately coincident with a centre point of the capture assembly housing 114.
  • the screen filter 120 is attached with a first edge 120a being adjoined adjacent but underneath the elongate spray bar nozzle 118. Water from the spray bar nozzle 118 is directed towards the screen filter 120.
  • a second edge 120b is located at a lower point on the distal inner side of the capture assembly housing 114 from the spray bar nozzle 118 side.
  • the second edge 120b is joined at a lower point, adjacent the base of the capture assembly housing 114.
  • the screen filter 120 is sloped from its uppermost point adjacent the spray bar nozzle 118 / the fluid inlet 116, to its lower most point distally from the spray bar nozzle 118.
  • the angle of the slope is between 15 and 30° to the horizontal.
  • the screen filter 120 is a 500 micron screen size in the present embodiment, although this size may be varied. Micro-solids within the water will collect on the upper surface 120c of the screen filter 120.
  • Spray jets 122 are mounted around the interior of the capture assembly housing 114, located above the screen filter 120. These may be fed by fresh water from the water mains or may be fed by water which is outputted from the apparatus 10 itself.
  • the spray jets 122 are spade jets 122 and direct towards the upper surface 120c of the screen filter 120 and may be used to wash micro-solids towards the second edge 120b.
  • a jet feed pipe or pipes 124 are provided to feed the spray jets 122 with fluid.
  • the spray jets 122 may be fed continuously whilst the apparatus is functioning or may be activated upon detection of a suitable control signal from a suitable sensor.
  • Water is allowed to pass through the filter screen 120 and pools within the lower portion of the capture assembly housing 114 which acts as a collection tank 114 for this treated water.
  • This water is sufficiently free from FOGs, primary solids and micro-solids to be safely disposed of in the main sewage system or may be recycled for local usage.
  • a discharge pipe 121 is attached to a lower corner of the capture assembly housing/tank 114 which allows the collected and treated water to exit the apparatus 10.
  • the bypass pipe 17 is connected to the assembly housing/tank 114.
  • a bypass non-return valve 123 is connected between the bypass pipe 17 and the assembly housing/tank 114.
  • effluent may flow directly into the assembly housing/tank 114 and through the discharge pipe 121.
  • the discharge pipe 121 may be connected to the drain or recycled locally.
  • a micro-solids exit slot 126 is in the sidewall of the capture assembly housing 114.
  • a micro-solids collection manifold 128 is provided on the exterior of the capture assembly housing 114, adjacent and beneath the micro-solids exit slot 126.
  • the micro-solids collection manifold 128 is provided with a tapered body 130 with the longest edge 132 joined to the capture assembly housing 114.
  • An outlet nozzle 134 is located distally from the tapered body 130.
  • a micro-solids paddle collector 136 is located between the lower most edge 120b of the screen filter 120 and the micro-solids exit slot 126.
  • the micro-solids paddle collector 136 comprises four paddle bodies 138 projecting from a central axle 140 and located within a tight-fitting cylindrical housing 142.
  • the four paddle bodies 138 and/or the cylindrical housing 142 may be perforated or grated such that water may pass through their surface, whereas micro-solids cannot.
  • Four separate micro-solids collection chambers 144 are therefore defined by the four paddle bodies 138 and the cylindrical housing 142.
  • Micro-solids collect within the first micro-solids collection chamber 144a presented adjacent the lower most edge 120b of the screen filter 120 as they are washed down the screen filter 120.
  • a stepper motor 146 rotates the central axle 140, moving a second micro solids collection chamber 144b into engagement with the lower most edge 120b of the screen filter 120 once the first collection chamber 144a is filled. This may be measured by weight or by the torque being applied to the stepper motor 146 by the presence of the micro solids within the first chamber 144a.
  • the first chamber 144a moves beneath the plane of the filter screen 120 and is strained of water against the housing 142.
  • a third micro-solids collection chamber 144c is rotated into engagement with the lower most edge 120b of the screen filter 120 once the second collection chamber 144b is filled by the stepper motor 146.
  • the second chamber 144b moves beneath the plane of the filter screen 120 and is strained of water against the housing 142.
  • the third chamber 144b moves towards the exit slot 126 and remains beneath the plane of the filter screen 120 and is strained of water against the housing 142. Water strained is allowed to flow into the base of the housing tank 114.
  • the first chamber 144a is brought above the plane of the filter screen 120 and into engagement with the exit slot 126 allowing micro-solids to exit into the manifold 128.
  • a micro-solids collection bin 148 is fed from the micro-solids collection manifold 128.
  • a compostable/biodegradable/digestible bag 150 is provided within the bin 148 into which the micro-solids are collected.
  • the bags 150 are replaced once full and may be collected for disposal and being formed from a compostable/biodegradable/digestible material provide a convenient way of collection and replacement.
  • the collection bags 150 have a bifurcated entry valve which self-seals once a sufficient quantity of micro-solids have collected.
  • the bags 150 are formed from a digestible, compostable and/or biodegradable material, such that they may be more easily or usefully disposed of (the micro-solids representing a significant energy potential for biogas etc). This may be a suitable bioplastic, cellulose-based or algae-based material. This process may be automated, such that once a bag 150 is filled, it may be replaced with an empty bag for further solids collection.
  • the rotating drum may be a sealed drum such that it has buoyancy when liquids are present in the skim chamber.
  • the drum / drum scraper / mounting plate assembly may be mounted to the side wall, such that it can move vertically in response to changes in liquid level in the central tank, due to the resulting buoyancy force (not shown). The vertical movement of the drum / skimmer assembly facilitates maximum FOG skimming cycle times by maintaining liquid - drum contact during changes of liquid level.
  • Figs 17 and 18 depict a second embodiment apparatus generally referred to as 210.
  • Common or analogous features are identified with a similar numbering scheme as to the first embodiment except with a prefixing “2” for integer numbers less than 100 (such as the compressor chamber 222 and central tank 244) and with a prefixing “3” for integer numbers greater than 100 (such as the capture assembly housing 314 and the screen filter 320).
  • a buoyant sealed drum 258 is used in the drum type skimmer mechanism 256.
  • the skimmer mechanism 256 is mounted upon a slidable bracket assembly 283. This allows the assembly to move vertically within the central tank 244 depending on the level of effluent within the central tank 244.
  • the slidable bracket assembly 283 comprises two drum mounting brackets 285 which mount the buoyant sealed drum 258 by its central axle 260.
  • L-shaped wall mounting brackets 287 are provided on the sidewall of the central tank 244 which constrain the lateral movement of the drum mounting brackets 285 but permit limited vertical movement.
  • a lower abutment 289 constrains the lowermost travel of the drum mounting brackets 285.
  • the drum scraper 278 comprising the mounting plate 280 and resilient blade 282 are pivotally mounted onto the sidewall of the central tank 244 via a pivot mounting 291. This allows the mounting plate 280 and resilient blade 282 to pivot in response to the movement of the skimmer mechanism 256 without requiring significant modification to the FOGs capture mechanism comprising the FOGs collection pipe 290 etc.
  • Fig. 17 shows the skimmer mechanism 256 located at a lower level within the central tank 244, and this may be as the central tank 244 is beginning to fill with effluent.
  • Fig. 18 shows the skimmer mechanism 256 located at a higher level within the central tank 244, and broadly analogous to the height of the fixed skimmer mechanism 56 in the central tank 44 of the first embodiment.
  • the skimmer mechanism 256 is able to function and skim FOGs with less effluent in the central tank 244.
  • Modifications and improvements may be made to the described embodiments without departing from the scope of the present invention.
  • multiple screen filters may be arranged within the tank 114 and may be layered to provide progressive filtering of micro solids.
  • the screen or screens may have a non-uniform grating size measured from first edge to second edge.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physical Water Treatments (AREA)
  • Filtration Of Liquid (AREA)

Abstract

La présente invention concerne des purificateurs d'eau, des agents de réhabilitation et un appareil de collecte de déchets, en particulier ceux utilisés dans un environnement de déchets alimentaires, tels que le ruissellement des eaux à partir de zones et d'installations de préparation d'aliments. La présente invention concerne un appareil de traitement de l'eau comprenant une entrée de fluide, un compresseur disposé à l'intérieur d'une chambre de compresseur, une chambre d'écumage disposée adjacente à la chambre de compresseur, un écumeur disposé à l'intérieur de la chambre d'écumage, un ou plusieurs conduits de fluide pour permettre le passage du fluide depuis la chambre de compresseur vers la chambre d'écumage, et un ensemble de capture de matières micro-solides. Le compresseur est un compresseur à vis.
PCT/GB2021/051776 2020-07-16 2021-07-12 Appareil et procédé de traitement de l'eau Ceased WO2022013531A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2010962.5 2020-07-16
GBGB2010962.5A GB202010962D0 (en) 2020-07-16 2020-07-16 Apparatus & method

Publications (2)

Publication Number Publication Date
WO2022013531A2 true WO2022013531A2 (fr) 2022-01-20
WO2022013531A3 WO2022013531A3 (fr) 2022-02-24

Family

ID=72338936

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2021/051776 Ceased WO2022013531A2 (fr) 2020-07-16 2021-07-12 Appareil et procédé de traitement de l'eau

Country Status (2)

Country Link
GB (1) GB202010962D0 (fr)
WO (1) WO2022013531A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115196776A (zh) * 2022-09-13 2022-10-18 山东丰香园食品股份有限公司 一种芝麻油生产污水处理设备

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5110461A (en) * 1990-09-05 1992-05-05 Abel Guenther Apparatus for separating liquids and solids
JPH09502418A (ja) * 1993-09-15 1997-03-11 アベル、ギュンター 固形物と液体との混合物を処理するシステムおよび方法
FR2755034B1 (fr) * 1996-10-25 1998-12-04 Atochem Elf Sa Dispositif, installation et procede de filtration de boues, en particulier de lisier
GB2497334B (en) * 2011-12-08 2014-01-08 James O'neill Apparatus for treating waste water
GB201518323D0 (en) * 2015-10-16 2015-12-02 Environmental Products & Services Ltd Grease Trap
CA3013767C (fr) * 2018-08-09 2024-02-27 David A. Rockwell Intercepteur de graisse amovible equipe d'une garniture jetable

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115196776A (zh) * 2022-09-13 2022-10-18 山东丰香园食品股份有限公司 一种芝麻油生产污水处理设备

Also Published As

Publication number Publication date
GB202010962D0 (en) 2020-09-02
WO2022013531A3 (fr) 2022-02-24

Similar Documents

Publication Publication Date Title
JP5147662B2 (ja) 油水分離回収装置
CN103249897B (zh) 用于处理废水的设备
CN109098270B (zh) 一种用于市政的污水抽取装置
CN106673243B (zh) 一种油脂截留装置
CN103951002A (zh) 固液分离装置
KR101271459B1 (ko) 발생할 때마다 바로 처리하는 수세식 가정오물처리장치
CN103274554B (zh) 餐饮废水处理工艺
EP3911607B1 (fr) Collecte de matières grasses, d'huiles et de graisses
WO2022013531A2 (fr) Appareil et procédé de traitement de l'eau
CN102343178B (zh) 用于从液体中去除漂浮物的装置和方法
US20030160006A1 (en) Separation apparatus with conveyor and separating hopper
CN103224300B (zh) 油脂分离器
JP4843700B2 (ja) 吸油装置及び吸い込み冶具
CN204529518U (zh) 一种新型餐饮废水处理全自动隔油提升设备
CN202865021U (zh) 全自动隔油提升一体化设备
JP4341850B1 (ja) 集合住宅用生ごみ処理活用システム
GB2543369A (en) An apparatus for treating waste water
CN118028056A (zh) 一种餐厨废弃油脂回收处理装置
JP2000042542A (ja) 油・スカム自動処理装置
CN102942260A (zh) 全自动隔油提升一体化设备
CN203269621U (zh) 集成型全自动隔油提升一体化设备
CN211871787U (zh) 一种集污泥脱水和絮凝除臭为一体的自动化处理装置
JP3651753B2 (ja) 油脂分除去システムと装置
CN210058613U (zh) 一种餐厨垃圾分类处理系统
CN221191707U (zh) 一种餐饮油水分离器

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21755013

Country of ref document: EP

Kind code of ref document: A2

WPC Withdrawal of priority claims after completion of the technical preparations for international publication

Ref document number: 2010962.5

Country of ref document: GB

Date of ref document: 20230116

Free format text: WITHDRAWN AFTER TECHNICAL PREPARATION FINISHED

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21755013

Country of ref document: EP

Kind code of ref document: A2