FR2644373A1 - Waste processing machine - Google Patents

Abstract

The waste processing machine which forms the subject of the invention includes a loading opening in the form of a lock 1, processing means, and means 5 for discharging the processed waste. The means for treating the waste consist, on the one hand, of a shredding system 2 associated with booms 3 for sprinkling a disinfectant product, and, on the other hand, of a pressing device 4 allowing the shredded matter to be impregnated by the disinfectant product and its volume to be reduced. The pressing device 4 takes the shredded waste back up in a receiving basket 29 in the form of a filter located above a tank 31 for recovering the disinfectant product. This machine may advantageously be used for treating infectious waste from hospitals or laboratories.

Description

 The present invention relates to machines intended for the treatment of waste, used in particular in laboratories, hospitals or restaurants, with a view to preparing this waste for disposal or for a subsequent operation, for example incineration.

 The food and hospital industries, in particular, produce large quantities of waste which are either disposed of as is or roughly treated by passing through grinders or compactors.

 Specialized companies for the collection and / or reprocessing of this waste or garbage must take more or less precautions for the handling of said waste, depending on their nature. The health precautions to be taken are especially very important in the case of waste from hospitals or laboratories, which waste can be infectious by the presence of germs or pathogenic viruses and therefore cause disease or pollution of the environment.

 The present invention relates to a waste processing machine intended to be located on the very site of production of said waste. The purpose of this machine is to carry out the complete decontamination of garbage, on the site itself, so as to allow the evacuation of all waste without any risk for the operator.

 The waste treatment machine, object of the invention, comprises a loading opening, treatment means and means for recovering the treated waste. According to the invention, the waste treatment means consist, on the one hand, of a grinding system associated with spray bars for disinfecting product and, on the other hand, of a pressing or compacting device permitting impregnation of said shredded material. by the disinfectant liquid and a reduction in its volume; the pressing device takes up the crushed waste on a receiving basket in the form of a first filter, which is arranged above a container for recovering the disinfectant liquid.

 This device achieves an excellent decontamination of waste, firstly by grinding, by the presentation of a large contact surface with the disinfectant product, and secondly by means of the compacting device which allows, thanks to the high pressures , to ensure impregnation at heart, and in all the interstices of the ground material.

 The compaction system also has the advantage of appreciably reducing the volume of waste.

 According to a particular arrangement which makes it possible to increase safety by isolating the grinding system from the outside, the loading opening is in the form of an airlock. This airlock is provided with an upper cover and a movable hatch obstructing the bottom; the waste to be treated is deposited on this hatch which has the possibility of opening only when the upper cover is closed.

 According to another arrangement of the invention, the grinding device of the machine consists of a set of mobile knives mounted on a rotary shaft controlled by a geared motor system. These mobile knives cooperate with fixed, interposed knives to ensure the destruction of waste and its reduction in the form of chips.

 In order to ensure the watering of the waste, the grinding device is surmounted by at least one ramp for the arrival of disinfectant liquid associated with a pressure injection pump. Or the ramps are arranged laterally so as not to hamper the descent of the waste and parallel to the support shaft of the mobile knives of the crusher.

 Still according to the invention, the compacting device consists of a press in the form of a hydraulic jack fitted with a piston-driven movement of horizontal movement. The piston, rectangular in shape, allows the crushed material to be taken up on the receiving basket and propelled to a compression chamber where it is reduced in the form of a brick.

 According to a particular arrangement, the bottom of the compression chamber is provided with a vertical drawer having a volume substantially equivalent to or greater than that of the compacted bricks. This drawer allows, by its withdrawal, the release of an opening through which can be automatically evacuated the crushed brick, pushed by the hydraulic compacting cylinder and possibly said drawer.

 Always selor. the invention, the disinfectant liquid recovery tank is provided at its upper part with a second disposable filter for the retention of small waste passing through the first filter.

 According to another arrangement of the invention, the terminal opening which allows the evacuation of the crushed bricks is associated with a horizontally movable chute.

This chute is disposed behind the opening during the evacuation of the bricks and under this opening during their compaction, so as to recover the liquid discharging through the edges of the vertical drawer and channel it towards the recovery tank.

 Still according to the invention, the ground material basket is associated with means allowing its vertical mobility between a high position corresponding substantially to the level of the lower part of the rectangular piston and a low position which allows, during the withdrawal of said piston, 'Avoid the latter scraping the unpressed ground material which has taken place incidentally behind said piston, during the compression phase.

 According to another arrangement of the invention, the processing machine is associated with a mobile carriage allowing the reception of the shredded bricks discharged through the terminal opening. This trolley supports a box provided with a plastic bag, which is kept open by means of a compass and consists of two support rods. These two rods are parallel in the open position of the bag; they are hinged to align in the closed position.

 Advantageously, this carriage is associated with an automatic bag welding system; this system consists of two movable, heating bars, arranged parallel to the two aligned support rods.

 According to another preferred arrangement, the waste treatment machine is provided with a suction turbine allowing the evacuation of odors from the recovery tank and the creation of a slight depression inside the plastic bag for recovering bricks of ground material, so as to facilitate its closing.

The invention also relates to a method for the implementation of the machine described above. According to the invention, this process consists of - opening the cover of the airlock; - introduce waste into the upper opening by
posing on the closed hatch - to close the hood - open the hatch; - to start up the grinding and watering systems, the
compacting device being in the inactive position, the
vertical drawer closed, waste collection basket
in the high position and the mobile chute under the opening
evacuation; - to stop the crushing and watering systems - to start up the compacting press - to release the compacting device - to move the mobile chute back and to open the vertical drawer
cal - to advance the presser to evacuate the brick from
compacted waste - put the chute under the vertical drawer while
putting the vertical drawer back in place - lowering the recovery basket - moving the piston of the compacting cylinder backwards - watering the piston to ensure cleaning of its rear side - reassembling the recovery basket so as to allow
the start of a new machine cycle.

 But the invention. will be further illustrated, without being in any way limited, by the following description of a particular embodiment, given by way of example and represented in the appended drawings, in which - FIG. 1 is a functional representation of the processing machine according to the invention; - Figure 2 shows the grinding system of the machine, consisting of movable knives associated with interposed fixed knives; - Figure 3 is a sectional view along 3-3 of the grinding device - Figure 4 shows, echematically, the opening system with a compass "of the plastic bag for recovering compacted bricks, as well as its system welding.

 As shown in FIG. 1, the waste treatment machine according to the invention comprises loading means in the form of an airlock 1, a grinding device 2 associated with spray bars 3 of disinfectant product , a pressing or compacting device 4 as well as means 5 allowing the evacuation of the treated waste.

 These main elements are supported by a metal frame and protected by a casing made of sheets obtained by cutting and stamping.

 The upper airlock 1 consists of an enclosure 6 delimited on the one hand by an upper cover 7 articulated around a horizontal axis 8 to allow the opening or closing of the airlock 1 and, on the other hand, by a movable hatch 9 controlled by a hydraulic jack 10. This trap 9 is movable in a plane substantially inclined relative to the horizontal and the piston of the jack 10 controls its sliding in order to open or obstruct the bottom of the airlock 1.

 The airlock opening 1 is preferably located on the side of the machine; it was drawn differently on the functional diagram, figure 1, for convenience of representation.

 The opening and closing of the hood 7 and hatch 9 are linked for security purposes, in order to avoid direct access to the grinding device 2 from the outside.

Thus the upper cover 7 can only open when the hatch 9 is in the closed position obstructing the bottom of the airlock 1. FIG. 1 shows the cover 7 closed and the hatch 9 open the reverse position is shown in thin dashed lines.

 The device 2 for grinding the waste is surmounted by ramps 3 for spraying disinfectant liquid. These ramps 3 are arranged under the hatch 9, near the side walls of the machine so as not to hinder the descent of the waste. These ramps 3 consist of simple tubes provided with spray nozzles 11 regularly spaced and directed relative to each other so as to achieve a uniform spraying of the products to be treated. The disinfectant liquid used is chosen according to the nature of the waste and the degree of disinfection desired. It is brought into the ramps 3 by means of a supply pipe 12 directly connected to a pressure injection pump 13 provided with a reservoir 14.

 The grinding device 2, surmounted by spraying ramps 3 is constituted by a set of mobile knives 15 mounted on a hexagonal rotary shaft 16 slightly inclined relative to the horizontal, parallel to the hatch 9. The knives 15 regularly spaced on said shaft 16, cooperate with fixed counter-knives 17 interposed, to achieve the shredding of waste.

 The assembly of knives 15 against knives 17 is shown in more detail in FIGS. 2 and 3. As can be seen in these figures, each knife 15 has a substantially circular shape provided with three radial extensions 18 producing peripheral cutting teeth. Each tooth 18 has a front face and a rear face in an arc, of opposite curvature. The knife 15 is intended to rotate in the direction of the arrow, FIG. 2. The front face 19 of the teeth 18 has a greater radius of curvature than the rear face 20; the edge is preferably sharpened to allow better shredding of the products to be treated. As an indication, the external diameter of the knives 15 can be of the order of 350 mm and their thickness of 25 mm. The teeth 18 are regularly spaced around the periphery of the knives.

These knives are provided, in their center, with a hexagonal orifice corresponding to the rotary shaft 16. The knives 15 are intended to be threaded on the shaft 16 on which they are separated from each other by means of rings. spacing 21, cylindrical, having a thickness substantially identical to that of said knives 15. The counter knives 17 are in the form of substantially rectangular plates supported on either side of the shaft 16, by the side walls 22, 23 of the machine. The substantially horizontal upper level of the counter knives 17 is situated substantially at the level of the axis of rotation 24 of the shaft 16. Each counter knife is arranged between two knives 15 and has a central opening 25 in a semicircle to follow the outline of the spacer rings 21.

 Each counter-knife 17 is associated with two reinforcements 17a intended to close the lateral empty spaces and force the waste to pass into the grinding system. These reinforcements 17a are integral with one of the sides of the counter-knives 17, they have a thickness that is substantially less than the spacing between the counter-knives and have an outline in an arc of a circle to follow the teeth 18 of the knives 15. They provide an opening 17b through which the waste can be discharged to the receiving basket 29.

 As can be seen in FIG. 3, the fixed counter-knives 17 extend in a plane slightly inclined relative to the vertical, parallel to the knives 15 and are arranged downwards, in the extension of the spacer rings 21.

 The grinding device 2 consisting of knives 15 and counter knives 17 occupies the entire surface of the machine. For this purpose, the outside diameter of the knives 15 is slightly less than the distance separating the two side walls 22 and 23 and the number of knives and knives is such that the entire width of the machine is occupied. For example, the rotary shaft 16 can support ten movable knives associated with nine interposed fixed counterknives.

 The shaft 16 is slaved to a geared motor system 26 to shred the waste. The latter will be reduced to chips of variable size according to the spacing of the knives 15 and counter knives 17.

 The gear motor 26 can for example drive the hexagonal shaft 16 at the speed of 19 revolutions / minute; it can be equipped with an overload safety device allowing the shredder to automatically shift into reverse and then return normally to forward. The rotary shaft 16 is normally guided on two opposite walls of the machine by means of ball bearing or other high capacity hubs.

 The compacting or pressing device 4 is placed under the grinding system 2. It consists of a press in the form of a hydraulic cylinder 27 slightly inclined relative to the horizontal so that its piston 28 can take up the waste coming from the crusher 2 and which are deposited on the basket 29, also slightly inclined relative to the horizontal. This waste spread on the basket is propelled by the press as shown in thin dashed lines in Figure 1, to a compression chamber 30.

This chamber 30 has a length of the order of 1/3 of the stroke of the piston 28.

 The receiving basket 29 consists of a perforated metal receptacle, allowing the passage of the surplus disinfectant liquid to a lower collecting tank 31.

 The jack 27 is equipped with an anti-rotary device and its piston 28 which has a rectangular shape, is understood in a plane substantially perpendicular to the bottom of the receiving basket 29. The lower level of the piston 28 is located slightly above from the bottom of the basket 29 so as to allow scraping of the crushed waste and its pressing in the compression chamber 30 situated on the side opposite the body of the jack 27, outside the size of the crusher 2. The compression chamber 30 s thus extends outside the parallelepipedic box constituted by the airlock 1, the crusher 2 and the recovery tank 31. The bottom 30a of this chamber 30 is located in the extension of the bottom of the basket 29; it is of rectangular shape and has dimensions corresponding to those of the piston 28 to allow compacting of the waste. Its end is closed by a drawer 32 movable vertically by means of a hydraulic cylinder 33.

 The drawer 32 has a thickness substantially equivalent to or greater than that of the bricks of waste compacted in the compression chamber 30. In the low position, it closes the discharge opening 34 located in the extension of the bottom 30a of the compression chamber 30.

This opening 34 has sufficient dimensions for the passage of compacted bricks.

 The vertical drawer 32 does not seal the discharge orifice 34 hermetically and the disinfectant liquid extracted from the ground material during pressing in the compression chamber 30, between the piston 28 and the drawer 32, has the possibility of evacuate through the orifice 34 around the peripheral edges of the drawer 32. A chute 35, movable in an inclined plane substantially parallel to the plane of displacement of the piston 28, is retractably positioned under the evacuation orifice 34 to channel the liquid disinfectant to the recovery tank 31. The mobility of the chute 35 can be obtained by means of the hydraulic cylinder 10 or by any other independent means.

 The recovery basket 29 is itself movable in a vertical plane by hydraulic means not shown. This mobility is achieved between a high position shown in Figure 1, corresponding substantially to the level of the lower part of the rectangular piston 28 and a low position, shown in thin phantom. The function of this vertical mobility will be explained below in connection with the operating mode of the machine.

 The tank 31 intended for the recovery of the disinfectant liquid coming from the basket 29 or from the chute 35 is positioned in the lower part of the machine, under the airlock 1, the grinder 2 and the basket 29. I1 is provided at its upper part , a filter 36 intended for the recovery of small waste passing through the openings of the perforated basket 29 forming the first filter. This second filter 36, of the plastic hole type, has smaller meshes than said first filter 29; the machine according to the invention is equipped with means allowing its direct access for its replacement.

 As can be seen in the lower part of Figure 1, the tank 31 is provided with a pipe 37 for connection to the reservoir 14. the injection pump 13. This particular arrangement allows the recycling of the disinfectant product in the upper part of the machine.

 The tank 31 is provided with a lateral access opening (not shown) allowing the addition of disinfectant products to each cycle. An overflow device 38 allows the evacuation of the excess liquid in the sewers and a minimum probe 39 ensures the addition of liquid when the latter is no longer in sufficient quantity. An automatic purge system can also be adapted on the recovery tank 31 allowing for example its weekly emptying.

 The waste treatment machine is associated with a mobile carriage 40 mounted on wheels, allowing the recovery of the bricks of shred evacuated by the opening 34 when the drawer 32 and the mobile chute 35 are removed.

 This trolley 40 can be fitted with a cardboard box 41 with dimensions of the order of 400 x 400 x 500, provided with a plastic bag 42. The recovery trolley 40 is placed under the evacuation opening 34, laterally from tray 31.

 As can be seen in Figure 4, the plastic bag 42 has in the box 41 is associated with a set of two support rods 43, 44 intended to keep it in the open position.

 These two horizontal rods 43, 44 are parallel in the open position of the bag and stretch its lateral edges to give it an opening in the form of a parallelogram. The two metal or plastic rods 43, 44 are respectively mounted on a vertical axis 45, 46 allowing their rotation in a horizontal plane. The two vertical axes 45, 46 pass substantially through the middle of each rod 43, 44; they are spaced apart from each other by a distance substantially greater than the length of the rods 43, 44 when the latter are such that the opening of the bag is in the form of a square. These two axes can be integral with the frame of the machine and they allow the articulation of the two rods 43, 44 to achieve their alignment as can be seen in thin dashed lines in Figure 4. This alignment achieves the closure of the mouth of the bag.

 In this position, two movable heating bars 47, 48, integral with the frame of the machine and each movable in the opposite direction in a horizontal plane, come to weld the upper part of the plastic bag.

 Each of the bars 47, 48 is for this purpose provided with an electric heating resistance and driven with a horizontal movement of movement by means of hydraulic jacks not shown. These two heating bars 47, 48 are arranged below the level of the support rods 43, 44; they are parallel to these two rods when the latter are aligned. When the two heating bars meet substantially at the level of the articulation axes 45, 46 of the rods 43, 44, they come into contact with the plastic to achieve its fusion and the sealed welding of the bag.

 The various constituent elements of the waste treatment machine according to the invention, previously described, are implemented, to ensure their respective function, by conventional automatic control means of the programmable automaton type not shown. A box, also not shown, allows the centralization of the machine control means.

 During their treatment, the waste will follow a vertical movement during which it will be sprayed, washed with the disinfectant liquid and crushed. The ground material obtained is then extracted from this vertical displacement line to carry out a first separation with the disinfectant liquid which continues its vertical stroke up to the lower recovery tank.

 The ground material, taken up substantially horizontally by the compacting means, is then removed by the mobile carriage fitted with terminal partitioning means.

 As we have seen above, the entire device is slightly inclined relative to the horizontal to allow better collection of the disinfectant liquid in the lower recovery tank 31.

 The method for implementing the machine described above consists firstly in opening the cover 7 to place the waste or bags of waste on the bottom 9 of the airlock 1. Once the upper cover 7 is closed, with a safety of closing by a two-hand control for example, the opening of the hatch 9 is controlled by actuation of the jack 10. The waste to be treated then falls on the grinding device 2 which starts operating actuated by the moto- reducer 26, at the same time as the sprinkling means 3, supplied by the injection pump 13.

 The teeth 18 of the movable knives 15 entrain the watered waste towards the fixed counter knives 17 for their shredding and their reduction in the form of chips. The grinding device 2 can for example be programmed to operate for 30 seconds.

 The watered ground material obtained falls on the basket 29 arranged in the high position. At this level, the piston 28 of the compacting cylinder 27 is fully retracted; the compression chamber 30, the bottom of which is located in the extension of the basket 29 is free and closed by the drawer 32; the chute 35 is positioned under the discharge opening 34.

 When all of the waste introduced into the airlock 1 has been crushed, the grinding device 2 is stopped as are the means for spraying disinfectant liquid, and the compacting device 4 is started.

 The rectangular piston 28, which has dimensions corresponding to those of the basket 29 and of the compression chamber 30, scrapes the bottom of said basket 29 to entrain the moistened ground material towards the compression chamber 30.

The excess disinfectant liquid and the very fine particles of waste pass through the orifices of the filter 29 and are received at the level of the lower tank 31.

The grinding of the shred in the compression chamber 30 is carried out in a single pass, by a rapid approach, for example under a pressure of 60 bars. Once this rapid approach has been carried out, the pressing or compacting proper is triggered to impregnate the waste to the core with the disinfectant liquid and to put this waste in the form of bricks 49, as shown in FIG. 1.

 This operation is carried out under high pressures, for example 25 tonnes / cm2; it can last for example 10 seconds, the reduction in volume obtained is approximately 80 *. This tightening of the waste produces a sort of spin and the surplus disinfectant liquid is evacuated by the edges of the drawer 32 passing through the evacuation orifice 34. This liquid is then taken up by the chute 35 which channels it towards the tank recovery 31. When the rectangular piston 28 forms the brick 49 of waste, the latter presses on the vertical drawer 32 itself in contact, on the other side, with an element of the frame of the machine.

 In order to avoid excessive evacuation of liquid through the orifice 34, during compaction, it is possible to provide a set of hydraulic jacks pushing the drawer 32 against the edges of the compression chamber 30.

This thrust goes against that of the piston 28 and can be of the order of 30 to 35 tonnes / c 2. In order to ensure a certain seal at this level, the corresponding face of the drawer 32 can be coated with an elastomeric material.

 When the brick 49 of treated product, impregnated to the core, is formed, the hydraulic cylinder 27 releases its pressure and the discharge means 5 are used.

 These evacuation means 5 consist first of all in moving the mobile chute 35 back by its control means of the hydraulic jack type, not shown. The vertical drawer 32 is released upwards, by the retraction of the piston of the control cylinder 33 allowing the release of the discharge opening 34. The piston 28 is advanced to position the brick 49 of product in place of the drawer 32 and carry out its evacuation by simple gravity through the orifice 34, or, as the case may be, pushed by the drawer which returns to its active position for closing the opening.

 When the brick 49 has fallen into the plastic bag 42, the neck 35 is replaced under the orifice 34.

 When the piston 28 makes its rapid approach to channel the comminuted material into the compression chamber 30, certain waste can pass over the said piston and fall back on the basket 29. In order to prevent the piston 28 from scraping this residual waste when it is replaced, in the retracted position, the basket 29 is provided with means of the hydraulic cylinder type allowing its slight displacement downward in the position shown in thin dashed lines in FIG. 1.

 Once the compacting and evacuation operation is complete, the receiving basket 29 is lowered and the piston 28 can be moved back to bring the latter back to the rest position. This recoil of the piston 28 is carried out with sprinkling of its rear face by means of a water injection nozzle 50, ensuring its cleaning. The basket 29 is then replaced in the high position and the drawer 32 is placed in its normal position for closing the compression chamber 30 to allow the engagement of a new treatment cycle by the machine.

 As can be seen in Figure 1, the machine can be provided with a suction turbine 51 connected at the upper part of the recovery tank 31, allowing the evacuation of odors from this tank and above all a slight depression of the machine. This turbine 51 may include a nozzle 52 intended for suction on the plastic bag 42.

 When this bag 42 for recovering compacted bricks is full, the closure system produced by the cooperation of the rods 43 and 44 with the heating bars 47 and 48 can be implemented while carrying out a slight suction by the stitching 52 so to put the bag 42 in slight depression and facilitate its waterproof closure.

 The mobile carriage 40 supporting compact and disinfected waste can be removed without any risk, for a subsequent treatment, for example decineration.

 The plastic bags 42 can for example contain five 4.5 kg bricks, each made from 3 kg of dry waste.

 Advantageously, the degree of filling of the plastic bag on the carriage 40 can be controlled by a weighing system linked to an optimal filling warning device.

 The reference signs inserted after the technical characteristics mentioned in the claims are intended only to facilitate the understanding of the latter and in no way limit their scope.

Claims (14)

- CLAIMS  1.- Waste treatment machine comprising a loading opening, means for treating waste and means for discharging said treated waste, characterized in that the means for treating waste consist, on the one hand, of a system of grinding (2) associated with booms (3) for spraying disinfectant product, and secondly, into a pressing device (4) allowing impregnation of the ground material by the disinfectant product and a reduction in its volume, said device press (4) taking up the crushed waste on a receiving basket (29) in the form of a first filter placed above a recovery tank - (31) of the disinfectant liquid.  2. A waste treatment machine according to claim 1, characterized in that it comprises a loading opening in the form of an airlock (1) provided with an upper cover (7) and a movable hatch (9) obstructing the bottom of said airlock (1).  3. A waste treatment machine according to any one of claims 1 or 2, characterized in that the grinding device (2) consists of a set of movable knives (15) mounted on a rotary shaft (16) controlled by a motor-reduction system (26), said knives (15) cooperating with fixed counter-knives (17), interposed, to ensure the destruction of the waste and its reduction into chips.  4. A waste treatment machine according to claim 3, characterized in that it comprises a grinding device (2) surmounted by at least one ramp (3) for the arrival of disinfectant liquid, associated with a pump. pressure injection (13), said ramps (3) being arranged laterally and parallel to the shaft (16) supporting the mobile knives (15) of the crusher (2).  5. A waste treatment machine according to any one of claims 1 to 4, characterized in that the compacting device (4) consists of a press in the form of a hydraulic jack (27) provided with a piston (28). animates a substantially horizontal movement movement, said piston (28), of rectangular shape, allowing the crushed material to be taken up on the receiving basket (29) and its propulsion towards a compression chamber (30) for its reduction in the form of bricks ( 49).  6.- waste treatment machine according to claim 5, characterized in that the bottom of the compression chamber (30) is provided with a vertical drawer (32) having a volume substantially equivalent to or greater than that of the bricks (49 ) compacted and allowing, by its withdrawal, the release of an opening (34) through which can be automatically evacuated the crushed brick (49), by the complementary actuation of the hydraulic cylinder (27).  7. A waste treatment machine according to any one of claims 1 to 6, characterized in that the tank (31) for recovering the disinfectant liquid is provided at its upper part with a second disposable filter (36), for the retention of small waste passing through the basket (29) in the form of a first filter.  8. A waste treatment machine according to any one of claims 6 or 7, characterized in that the terminal opening (34) for evacuating bricks (49) of ground material is associated with a mobile chute (35), which chute (35) is disposed back from the opening (34) during the evacuation of the bricks (49) and under said opening (34) during their compaction, so as to recover the disinfectant liquid discharged by the edges of the vertical drawer (32? and channel it to the recovery tank (31).  9. A waste treatment machine according to any one of claims 5 to 8, characterized in that the basket (29) for receiving the ground material is associated with means allowing its vertical mobility between a high position corresponding substantially to the level of the lower part of the rectangular piston (28) and a low position which makes it possible, during the withdrawal of said piston (28), to prevent the latter from scraping off the unpressed ground material.  10.- waste treatment machine according to any one of claims 1 to 9, characterized in that it is associated with a movable carriage (40) for receiving the ground bricks (49) discharged through the opening (34 ), said carriage (40) supporting a box (41) provided with a plastic bag (42) kept open by means of a compass consists of two support rods (43, 44), parallel in the bag opening position, hinged to align in the closed position.  11. A waste treatment machine according to claim 10, characterized in that the carriage (40) is associated with an automatic sad welding system (42), said system being in the form of movable heating bars (47, 48) parallel to the two aligned support rods (43, 44).  12.- waste treatment machine according to any one of claims la 11, characterized in that it comprises a turbine (51) for suctioning odors from the recovery tank (31) and allowing, by a pricking (52 ), to create a slight depression inside the plastic bag (42) to facilitate its closing.  13.- A method for implementing the machine according to any one of claims 1 to 12, characterized in that it consists of - introducing the waste into the upper opening in  airlock form (1); - to start up the grinding (2) and sprinkler (3) system; - to stop the grinding (2) and watering (3) system - to start the compacting press (4); - to carry out the evacuation of the compacted product obtained.  14.- Method according to claim 13 for the implementation of the machine according to claims 2, 5, 6, 10, 11 taken together, characterized in that it consists - in opening the cover (7) of the airlock (1 ), - placing the waste on the closed hatch (9) of the airlock (1), - closing the cover (7), - opening the hatch (9), - switching on the sprinkler means (3 ) and grinding  (2), the compacting device (4) being in position  inactive, the vertical drawer (32) closed, the basket (29) in  high position and the movable chute (35) under the opening  evacuation (34), - stopping the crusher (2) and watering (3), - switching on the compacting device (4), - releasing the compacting device (4), - backing up the chute (35) outside the bulk of  the evacuation orifice (34), - 9 open the drawer (32) to release the opening (34), - to advance the presser (28) to evacuate the brick (49)  of compacted product, - put the chute (35) under the drawer (32) and close  the latter to obstruct the compression chamber (30), - lower the basket (29), - move the piston back (28) to put it back in position  inactive, - spraying the piston (28) to ensure cleaning of its  rear face, - to raise the basket (29) so as to allow the latching  ment of a new cycle.