WO2012134289A1

WO2012134289A1 - Device for shredding and discharging large scale household and/or medical waste into a sewer system

Info

Publication number: WO2012134289A1
Application number: PCT/NL2012/050208
Authority: WO
Inventors: Michiel De Jong; Cornelis De Groen; Maarten WASSINK
Original assignee: Shredx B.V.
Priority date: 2011-03-30
Filing date: 2012-03-30
Publication date: 2012-10-04

Abstract

A device for shredding and discharging large scale household and/or medical waste into a sewer system. Such device comprises an inlet (1a) for the waste; a shredder arrangement (10) for shredding waste provided through the inlet; a confined space (12) below the shredder arrangement for collecting shredded waste from the shredder arrangement; an outlet (70) for discharging shredded waste into the sewer system (29); a discharge conduit (60) provided between the confined space and the outlet; and a transporting arrangement (35, 36, 38, 40) for transporting shredded waste from the confined space through the discharge conduit towards outlet.

Description

Device for shredding and discharging large scale household and/or medical waste into a sewer system

The present invention relates to a device for shredding and discharging large scale household and/or medical waste into a sewer system, said device comprising an inlet for said waste; a shredder arrangement for shredding waste provided through said inlet; and an outlet for discharging shredded waste into said sewer system.

In large scale households, like nursing homes and hospitals, one regularly needs to dispose of relatively large amounts of waste and certain kinds of such waste may require special treatment. Mostly, such waste cannot be easily reduced in size, resulting in large volumes of wastes to be transported through public and personnel areas of a building. Handling certain kinds of waste may expose personnel to considerable risks, such as in hospitals. Bottles and other containers filled with a contagious material, or a material that otherwise poses a health risk are an example. Handling of waste also poses a problem in other buildings than hospitals in which a large number of people are present and in which waste is produced.

A device for efficiently disposing of waste is therefore required. It is

advantageous that such a device allows can be installed in an easy manner without any major modifications to existing infrastructure of the building, such electricity mains, water mains, and discharge. It has been proposed to as an existing sewer system or a dedicated conduit arrangement as a discharge. Theoretically, such a system might work, but practically problems are experienced due to the large amounts and varying quality of the waste, such as malfunction and clogging of the device and system, which require skilled personnel to solve. Since the waste can impose health risks, as indicated above, especially when presented to the sewer system in a shredded manner, any actions to remedy the problems are undesirable and have to be carried out taking considerable safety measured into account.

FR 2 668 953 A discloses a device for shredding and discharging waste through a sewer system. However, the device is configured such that it very vulnerable to clogging or obstruction of the system and other kinds of malfunction.

WO 93/13861 A discloses a system for processing used medical equipment, which only reduces the volume of the equipment. Waste still requires handling for further transport. It is an object of the present invention to provide a device for shredding and discharging household and/or medical waste, which is easy to operate, involves no risks for personnel operating the device, and which produces waste that can be removed in an uncomplicated and efficient manner.

Furthermore, it is an object to provide a device that can be operated by the personnel collecting the waste, and who may be involved in using the equipment or materials to be discharged by the device. Such a device should be ready for operation at any time, meaning that there should be no waiting period.

Yet further, it is an object of the invention to allow shredding and discharging a large variety of household and medical waste. A device is envisioned which is not critical regarding its functioning, which allows all kinds of personnel to dispose of waste in the device without any undesirable side effects, such as health risk hazards.

At least some of these objects are achieved by a device for shredding and discharging large scale household and/or medical waste into a sewer system, said device comprising an inlet for said waste; a shredder arrangement for shredding waste provided through said inlet; a confined space at least substantially below said shredder arrangement for collecting shredded waste from said shredder arrangement; an outlet for discharging shredded waste into said sewer system; a discharge conduit provided between said confined space and said outlet; and a transporting arrangement for transporting shredded waste from said confined space through said discharge conduit towards said outlet.

The device provides for a confined space in which shredded waste from the shredder arrangement is accumulated, and forced removal of shredded waste from the confined space by the transporting arrangement into the sewer system. Blocking of the device and the system will therefore be prevented and removal of shredded waste is secured. In an advantageous embodiment said transporting arrangement comprises at least one water conduit arranged such as to transport shredded waste with water discharged from said water conduit to said outlet. Using water to assist in discharging shredded waste towards the outlet is a very simple, efficient and readily available means.

Preferably, said water conduit is arranged such that water discharged from said water conduit is directed to within and at least partially along said discharge conduit towards said outlet. Such arrangement provides the shredded waste with an impulse along the discharge conduit to achieve a very effective discharge of the shredded waste towards the sewer system. In a preferred embodiment, an angle enclosed by a direction of water discharged from said water conduit into said discharge conduit and a direction along said discharge conduit towards said outlet is between 0 and 50 degrees.

Said water conduit may be connected to said at least one water conduit is connected to said confined space and/or said discharge conduit. For a very effective discharge of shredded waste said transporting arrangement preferably comprises a water supply connected to said water conduit such as to allow a surged water discharge through said water conduit. This is easily achieved by an embodiment in which said water supply comprises a reservoir.

In another effective embodiment that guarantees discharge of shredded waste towards the outlet, said transporting arrangement comprises a mechanical displacement device arranged such as to displace shredded waste towards said outlet. This easily and effectively achieved in an embodiment wherein said mechanical displacement device comprises a screw transporter provided in said discharge tube, said screw transporter being coupled to a motor for driving said screw transporter.

In yet another embodiment said mechanical displacement device is arranged to transport shredded waste into a collecting space of said discharge conduit, and said water conduit is connected to said collecting space. Such embodiment comprises two means for discharging shredded waste towards the outlet for enhanced effectiveness.

In yet a further embodiment said transporting arrangement comprises a grubbing arrangement within said confined space, said grubbing arrangement being arranged such as to prevent clogging of shredded waste within said confined space. In an embodiment the grubbing arrangement comprises at least one grubbing wheel having outwardly extending protrusion, said at least one grubbing wheel in use being driven to rotate. A grubbing arrangement achieves motion in shredded waste accumulated in the confined space such that its downward movement is guaranteed and clogging is prevented.

The invention further relates to a device for shredding and discharging large scale household and/or medical waste into a sewer system, said device comprising an inlet for said waste; a shredder arrangement for shredding waste provided through said inlet; and an outlet for discharging shredded waste into said sewer system, wherein said shredder arrangement comprises at least one essentially cylindrical shredder having a cylindrical surface provided with protrusions.

In an embodiment said shredder arrangement comprises a push plate for forcing waste against said at least one roller.

In an embodiment the device comprises a control, which may be a control for the transporting arrangement. The control may be configured for intermittent discharge of water from said water conduit.

In an embodiment the amount of water discharged from said water conduit is chosen such said the volume of discharged water and shredded waste fills about 20% to 80%) of said discharge conduit.

In an embodiment water is discharged intermittently until a first predetermined time interval has lapsed after shredded waste has entered said discharge conduit. In an embodiment said time interval is between 2 and 10 minutes, especially about 4 minutes. In an embodiment a second time interval lapses between intermittent water discharges. In an embodiment said second time interval is between 10 and 60 seconds, especially about 30 seconds.

In yet another embodiment said device comprises a lock chamber for said waste to pass before arriving at the shredder arrangement, said lock chamber comprising said inlet; a inlet cover for said inlet; a lock chamber outlet opening into a shredder space comprising said shredder arrangement; and a lock chamber outlet cover, said covers being configured for opening said inlet cover only when said lock chamber outlet cover is closed, and opening said lock chamber outlet cover only when said inlet cover is closed.

In an embodiment said lock chamber outlet cover comprises a slideable or rolling shutter.

In an embodiment the discharge conduit comprises a stench-trap. The stench-trap can be embodied as a siphon, a non-return valve or a valve operated by said control.

The invention further relates to a corresponding method for shredding and discharging large scale household and/or medical waste into a sewer system

The invention will further be explained by reference to the accompanying drawings, in which like or same parts are indicated using same reference symbols, and in which

Figure 1 schematically shows a first embodiment of a shredder and discharging device according to the invention;

Figure 2 schematically shows a second embodiment of a shredder and

discharging device according to the invention;

Figure 3 schematically shows a third embodiment of a shredder and discharging device according to the invention;

Figure 4 schematically shows a fourth embodiment of a shredder and discharging device according to the invention;

Figure 4a shows a detail of the shredder arrangement and transporting

arrangement of figure 4 in a perspective view; and

Figure 5 schematically shows a building, like a hospital, with a sewer system to which shredder and discharge devices according to the invention are coupled.

The figures show a device 1 for shredding and discharging waste of, for instance, hospitals or other large scale households, like a nursing home. The shredder and discharging device 1 comprises a housing 2 having an inlet la, and defining a buffer space 8 and a shredder space 9. Buffer space 8 and shredder space 9 are separated from each other by one or more lids or valves 6. Figures 1 and 2 show two hinged valves 6 that can be opened in the direction of arrows 28 by motor 7 under control of control 20. A slideable lid or valve, a slideable or rolling shutter or any other suitable lid or valve 6 may also be employed, as is disclosed in figures 3 and 4. Rolling or slideable shutter or valve 6 in figures 3 and 4 opens by sliding in the direction of arrow 28 and closes by movement in the opposite direction. Figure 3 shows that shutter 6 is movable by motor 7. In an opened position shutter 6 suspends vertically in figure 3. Figure 4 shows that shutter 6 is, in an opened position, wound around a cylinder comprising motor 7.

The buffer space is at its side opposing valve(s) 6 delimited by a hingeable lid or cover 3, which can be opened in the direction of arrow 4 to open inlet la. Lid 3 can also take the form of a slide, rolling shutter or any other suitable form. Lock 5 on the one hand locks lid 3 when closed, and on the other hand acts as a sensor to determine whether lid 3 is in a closed position or open position. Lock 5 is also connected to control 20. Waste to be shredded and discharged is provided into buffer space 8, after which lid 3 is closed. Subsequently, valve 6 is opened to provide the waste into shredder space 9.

A sprinkler 14 connected to a water supply 15 and controlled by control 20 is provided in buffer space 8. A number of sprinklers 14 may arranged along walls of buffer space 8. Sprinkler 14 as shown is statically arranged, but it may also be configured as, for instance, a sprinkler having a rotating arm from which water is sprinkled.. In this manner the whole surface of wall, valves and lids delimiting buffer space 8 can be covered for cleaning thereof. Such sprinklers can also be provided in shredder space 9. Furthermore, steam connections having corresponding nozzles can be provided for cleaning and/or sterilizing of the buffer space and/or the shredder space.

A conduit 16 can be connected to buffer space 8 and/or shredder space 9. A fan 17 is provided in conduit 16 and controlled by control 20 to keep buffer space 8 and/or shredder space 9 at an under pressure as compared to the surroundings of device 1. Conduit 16 is connected to outlet 70 of device 1. Shredded waste is discharged through outlet 70 into the sewer system 29 of a building in which device 1 is being used. Conduit 16 with fan 17 may also blow out into the surroundings in combination with filtering of discharged air in a filter, such as one using active coal.

A shredder arrangement 10 is provided in shredder space 9. Waste is provided in feeding direction 23a to the shredder arrangement 10, and shredded waste is discharged in a discharge direction 23b. Shredder arrangement 10 acts in a substantially vertical direction for shredding waste and comprises, in the embodiments shown, one or two cylindrical shredding rollers 11 provided with protrusions or blades. Each cylinder has an axis of rotation, both axes of rotation of the configuration having two rollers 11 being arranged in parallel so that both shredding rollers are arranged alongside each other. Rotation of rollers 11 during a shredding action of the configuration having two shredding rollers is such that they counter rotate such that both rollers show a downward movement in between both axes of rotation as viewed along arrows 23 a and 23b. Waste is caught in between both rollers and dragged downwards while being crushed. Also for the shredder arrangement having one shredding roller waste is directed downwards in the direction of arrows 23a and 23b. In general, the shredder device may also have more than two shredder rollers 11. By the shredding action, and any water supplied by sprinklers 14, when used, a quantity of shredded waste is produced, which can be transported through regular sewer systems.

Shredding arrangement 10 further comprises a sieve 61 provided just below shredding roller(s) 11. Waste shredded small enough passes openings in sieve 61, while shredding arrangement 10 is configured such that waste not yet shredded small enough will pass again in between shredding roller(s) and/or walls 80 to be shredded or crushed to smaller sizes. A distance between sieve 61 and shredding rollers 11 is made small enough to catch particles too large to pass sieve 61 with the protrusions, blades or knives of the shredding roller(s). The distance between the sieve and shredding roller(s) is about the size of the openings in sieve 61 or smaller, but still large enough for the protrusions, blades or knives on rollers not to come into contact with the sieve.

When having passed shredding arrangement 10, shredded waste will come into a confined space 12 below the shredding arrangement in which shredded waste is collected. Confined space 12 comprises walls 80. From confined space 12 the shredded waste is to pass a discharge conduit 60 to outlet 70 and into the sewer system. A transporting arrangement is provided for transporting shredded waste accumulated in confined space 12 into discharge conduit 60.

Using a sensor 65 it can be detected whether any waste is still present between shredding rollers 11, which may be an indication for clogging. It may be used to turn off shredding arrangement 1 using control 20. Sensor 65, or another sensor, can also be used to detect whether any shredded waste is still present in confined space 12 below sieve 61 and/or whether any shredded waste is still being provided by the shredding arrangement into the confined space.

In the embodiment of figure 1 the transporting arrangement comprises a water conduit 35 connected to the confined space 12. Water can be discharged from a reservoir 36 through water conduit 35 into confined space such that shredded waste and discharged water pass through discharge conduit 60 into the sewer system.

Water is released from reservoir 36 by opening valve 38 in water conduit 35. Valve 38 is activated by control 20. Reservoir 36 can be filled with water using water connection 37 during a period of time in which valve 38 is closed. In the embodiment shown water connection 37 has a limited diameter and therefore a limited capacity of supplying water. Using a reservoir 36 allows a surged water discharge into water conduit 35 and therefore into confined space 12 and discharge conduit 60. Water can be supplied at a rate of at least 0.5 liters per second. By using a surged water supply in a large quantity a considerable forward impulse is provided to accumulated shredded waste in confined space 12. Such shredded waste and any further shredded waste present in discharge conduit 60 is carried with discharged water along the discharge conduit. Reservoir 36 can be configured as a pressurized reservoir or not. A pressurized reservoir can be provided by a reservoir having two chambers separated by a membrane. A first chamber is filled with a gas at a pressure below a water supply pressure. The second chamber is filled with water. When the second chamber is filled with water, the gas pressure in the first chamber is increased to pressurize the water in the second chamber to allow a surged water release at a high flow rate. Water connection 37 can be connected to the public water mains. Water may also be supplied from another source than drinking water, such as rain water, gray water and the like.

A stench-trap 13 embodied as a siphon is provided downstream of discharge outlet of water conduit 35. A coupling can provided to access discharge conduit 60 or the sewer system for maintenance purposes, such as unblocking. A steam connection can be provided for disinfection purposes. Releasing water from reservoir 36 through water conduit 35 can also be used for cleaning purposes. A disinfectant may be added to water in reservoir, whether or not dosed through water connection 37, for

disinfecting discharge conduit 60. The control 20 can be configured such that when waste is detected by the sensor in lock 5, sensor 65 or any other sensor used, water is supplied at intervals, which may be intervals regular in time or not.

Figure 2 shows an embodiment in which water from said water conduit is directed more along discharge conduit 60 by more aligning water conduit 35 and discharge conduit 60. Water discharged from water conduit 35 is directed to within and along discharge conduit 60 towards outlet 70. Preferably, angle a enclosed by the direction of water into discharge conduit 60 and a direction locally along discharge conduit 60 is 50 degrees or less. Water may be supplied either upstream or downstream of a stench-trap, which can be dependent on the embodiment of the stench-trap.

The shredder arrangement shown in figure 2 comprises only one shredding roller 11 having relatively long knives or teeth. On one side of roller 11 an

extension 81a of wall 80 extends up to the teeth of roller 11 but leaving some clearance. On the other side of the roller, an extension 81b of wall 80 extends to and in between the teeth of the roller. Such extensions 81a and 81b further improve crushing of waste in the shredder arrangement. They can also be employed in the shredder arrangement of figure 1. Further, extension 81a may be configured as extension 81b to extend in between the teeth, and extension 81b may be configured as extension 81a.

In the embodiment of figure 3 the transporting arrangement comprises a mechanical displacement device embodied as a screw transporter 40 arranged under shredder arrangement 11. Screw transporter 40 comprises a housing 41, that is a part of discharge conduit 60. An inlet of the screw transporter is provided at confined space 12 and an outlet of the screw transporter opens into discharge conduit 60 in the direction of outlet 70. A single transporter screw 44 having longitudinal axis 50 is arranged in housing 41. Transporter screw 44 is driven by motor 48 controlled by control 20. A 90 degrees transmission transmits a rotation movement of motor 48 onto transporter screw 44. Any other type of transmission can also be employed, such as a planetary transmission.

A valve 45 is provided downstream of screw transporter 40, control of which is not depicted in the figure. Valve 45 can be a non-return valve or an electrically driven valve that is controlled by control 20. Conduit 16 discharges in between outlet of screw transporter 40 and valve 45. Downstream of valve 45 discharge conduit comprises a downpipe 47 of which outlet 70 is connectable to the sewer system.

Screw transporter 40 can be operated when shredded waste is detected by sensor

65 or immediately when shredder arrangement 10 is operated, after a predetermined time interval following operation of shredder arrangement 10, etc. Screw transporter 40 allows a secured transport of shredded waste into the sewer system, but moreover in a dosed and spreaded displacement of shredded waste, such that clogging of the sewer system is largely prevented.

Shredder arrangement 10 in the embodiment of figure 3 comprises one shredding roller 11 having pyramid shaped protrusions. At one side of the roller a wall 80 and extension 81a are shown, which are comparable to the ones shown in figure 2. The other side of roller 11 shows an extension 81b also extending in between protrusions of the roller. Extension 81b of figure 3 is an extension of a bottom wall 80' of shredder space 9. The shredder arrangement 10 of figure 3 further comprises a push wall 82 that can be displaced to and from roller 11 in the direction of arrow 85 about a hinge 82a. Push wall 82 can be displaced by a motor 82b driving a spindle 82c to which one end 82e of a connecting rod 82d is hingeably coupled such by a crew thread connection that it can be moved up and down the spindle when the spindle is rotated. The other end 82f of connecting rod 82d is hingeably coupled to push wall 82. Rotating spindle 82c by motor 82b causes a displacement of push wall 82. By displacing push wall 82 towards roller 11 waste in between push wall and roller is forced against roller 11 to further improve a shredding or crushing action of shredder arrangement 10.

The embodiment of figure 4 shows, in addition to the embodiment of the transporting arrangement of figure 3, a collecting space 63 within discharge conduit 60 downstream of screw transporter 40. Figure 4 shows a shredder arrangement comparable to the one shown in figure 2 but having pyramid shaped protrusions instead of knives on shredding roller 11. A dose of shredded waste from screw transporter is accumulated in collecting space 63, and subsequently discharged towards outlet 70 and the sewer system using water discharged from water conduit 35 connected to collecting space 63. Water connection 35 is connected at an angle a of about 45 degrees to collecting space 63 so water discharged from water conduit 35 is directed to within and along discharge conduit 60 towards outlet 70. Preferably, the angle a enclosed by the direction of water into discharge conduit 60 and a direction locally along discharge conduit 60 is 50 degrees or less. By accumulating a dosed amount of shredded waste into collecting space 63, which is subsequently mixed with water from water conduit 35 further improves a guaranteed discharge of shredded waste through discharge conduit 60 and the sewer system. The amount of shredded waste accumulated in collecting space 63, the amount of water supplied and the flow rate of water supplied can be tuned for optimizing discharging shredded waste. It can be done such that the amount of water used for discharging is kept at a minimum.

Figure 4 further shows a grubbing arrangement comprising grubbing wheels 91 along walls 90 of confined space 12. Such grubbing arrangement acts to have shredded waste move downwards towards discharge tube 60. The grubbing arrangement, for instance, prevents bridge forming of shredded waste in between opposing walls 90 of confined space 12. It therefore assists gravity forces to have shredded waste move downwards. Grubbing wheels 91 comprise outwardly extending fins as is better shown in figure 4a. Outward ends of the fins extend within spaces of the helix of the transporter screw 44 such that the fins mesh with the transporter screw. Transporter screw thus drives the grubbing wheels 91. Since figure 4 is only very schematically drawn, it does not exactly correspond to figure 4a with respect to the interaction of grubbing wheels 91 and transporter screw 44.

As described with reference to figures 1 to 4 a transporting arrangement is disclosed for transporting shredded waste from confined space 12 below shredder arrangement 10 through discharge conduit 60 towards outlet 70. The transporting arrangement may comprise various elements as described, such as the water conduit and associated water supply, the mechanical displacement device taking the form of a screw transporter 40 and a grubbing arrangement within the confined space. Such elements may be used either alone or in combination within the scope of the invention.

Further, various embodiments of a shredder arrangement 10 are disclosed in the various figures and embodiments. Elements of one shredder arrangement may also be employed in one of the other shredder arrangements described. The push plate 82 as described by reference to figure 3, for instance, may also be employed in the embodiments of the shredder arrangement described with reference to the other figures.

Control 20 of the device is configured such that lid 3 and valve(s) 6 cannot be opened at the same time. Lock 5 acts to keep lid 3 in a closed position while valve(s) 6 are in an open position. Lid 3 can only be opened in case valve(s) 6 are in a closed position. Opening of lid 3 activates a sensor in lock 5 such that control 20 will keep valve(s) 6 in a closed position. When opening lid 3 a user will only have access to buffer space 8, not to shredder space 9. Shredder device 10 can therefore be configured relatively heavy without involving any health risks. Opening of lid 3 can be by manually but also mechanically, for instance, by employing a proximity sensor or a push button such as a foot-operated switch. When a user provides waste into buffer space 8, lid 3 will be locked by lock 5 after it has been closed, and valve(s) 6 will open to allow waste to drop in a direction indicated by arrow 23a onto and in between shredder rollers 11. Water can then be supplied by sprinklers 14. The shredder arrangement 10 can be activated in any convenient manner. According to an

advantageous embodiment shredder arrangement 10 is only activated when both lid 3 and valve(s) 6 are in a closed position.

Based on input from sensor 65 or any other sensor available in the device control 20 can activate (intermittent) discharge of water from water conduit 35 and/or activate screw transporter 40. Apart from input from any sensor, water may be supplied intermittently from water conduit 35. It may be supplied intermittently over a certain time interval in the range of, for instance, 2 to 10 minutes, especially about 4 minutes after shredded waste has been presented. A time interval between intermittent discharges can be in between, for instance, 10 and 60 seconds, especially about 30 seconds.

Figure 5 schematically shows a building 25 provided with a number of devices 1 according to the present invention and connected to sewer system 29. Such sewer system can be a regular sewer system, that is, toilets, showers, kitchen sinks and the like can be connected to such sewer system as well. A shared pharmaceutical filter 22 configured as a plasma filter is provided at the connection of sewer system 29 to the public sewer system.

By employing the present invention it is possible, when a water connection and a sewer connection in combination with a mains connection are present, to install a fully independently working apparatus that allows discharging all kinds of waste, including metal parts and the like, in an hygienic manner. Use of a ventilator effectively prevents spreading of odors, microorganisms and the like.

The skilled person can easily derive variants of the embodiments disclosed, which all are within the scope of the accompanying claims. The various embodiments described are only exemplary embodiments. Various elements disclosed may be combined, left out or interchanged.

Claims

1. A device (1) for shredding and discharging large scale household and/or medical waste into a sewer system (29), said device comprising

- an inlet (la) for said waste;

- a shredder arrangement (10) for shredding waste provided through said inlet (la);

- a confined space (12) at least substantially below said shredder

arrangement (10) for collecting shredded waste from said shredder arrangement (10);

- an outlet (70) for discharging shredded waste into said sewer system (29);

- a discharge conduit (60) provided between said confined space (12) and said outlet (12); and

- a transporting arrangement (35, 36, 38; 40) for transporting shredded waste from said confined space (12) through said discharge conduit (60) towards said outlet (70).

2. The device according to claim 1, wherein said transporting arrangement comprises at least one water conduit (35) arranged such as to transport shredded waste with water discharged from said water conduit (35) to said outlet (70).

3. The device according to claim 2, wherein said water conduit (35) is arranged such that water discharged from said water conduit (35) is directed to within and at least partially along said discharge conduit (60) towards said outlet (70).

4. The device according to claim 3, wherein an angle (a) enclosed by a direction of water discharged from said water conduit (35) into said discharge conduit (60) and a direction along said discharge conduit (60) towards said outlet (70) is between 0 and 50 degrees.

5. The device according to any one of claims 2 to 4, wherein said at least one water conduit (35) is connected to said confined space (12) and/or said discharge conduit (60).

6. The device according to any one of claims 2 to 5, wherein said transporting arrangement comprises a water supply (36) connected to said water conduit (35) such as to allow a surged water discharge through said water conduit (35).

7. The device according to claim 6, wherein said water supply comprises a reservoir (36).

8. The device according to any one of the preceding claims, wherein said transporting arrangement comprises a mechanical displacement device (40) arranged such as to displace shredded waste towards said outlet (70).

9. The device according to claim 8, wherein said mechanical displacement device comprises a screw transporter (44) provided in said discharge tube, said screw transporter (44) being coupled to a motor (48) for driving said screw transporter.

10. The device according to any one of claims 8 and 9 and anyone of claims 2 to 7, wherein said mechanical displacement device (40) is arranged to transport shredded waste into a collecting space of said discharge conduit, and said water conduit (35) is connected to said collecting space (63).

11. The device according to any one of the preceding claims, wherein said transporting arrangement comprises a grubbing arrangement within said confined space (12), said grubbing arrangement being arranged such as to prevent clogging of shredded waste within said confined space.

12. The device according to claim 11, wherein said grubbing arrangement comprises at least one grubbing wheel (91) having outwardly extending protrusion, said at least one grubbing wheel in use being driven to rotate.

13. The device according to any one of the preceding claims, wherein said shredder arrangement (10) acts in a substantially vertical direction for shredding waste.

14. The device according to claim 13, wherein said shredder arrangement (10) comprises at least one essentially cylindrical shredder (11) having a cylindrical surface provided with protrusions.

15. The device according to claim 14, wherein said shredder arrangement (10) comprises two essentially cylindrical shredders (11) arranged alongside such as to allow counter rotation about parallel axes.

16. The device according to any one of claims 14 and 15, wherein said shredder arrangement (10) comprises a push plate (82) for forcing waste against said at least one roller (11).

17. The device according to any one of the preceding claims, wherein said device comprises a control (20) for the transporting arrangement.

18. The device according to claim 17 and to any one of claims 2 to 7, wherein said control (20) is configured for intermittent discharge of water from said water conduit (35).