EP1106254B1 - System and apparatus for disposal of liquid waste from a laboratory work station - Google Patents

Description

The invention relates to a disposal system and apparatus for disposing of liquid waste at a laboratory workstation.

In a laboratory, especially in a chemical laboratory, waste materials accumulate, eg. As acids, solutions and salts that are aggressive, harmful and harmful to the environment, this not only applies to the waste itself but also for gases emitted by them. In this way, special measures must be taken in the disposal of waste to avoid that harmful waste itself or from these outgoing gases in a laboratory or outside the laboratory on the way of their disposal can cause damage.

EP 0 517 008 A2 describes a system for disposing of laboratory waste, in which a receptacle for waste material is positioned or adjustable in an adjustment or inner container and the setting or inner container in an outer body. The displaced during filling of the container vapors and gases escape through vent holes from the container into the inner container and can be sucked there. If the container is filled, it must be removed and transported away for the purpose of disposal of the waste contained therein, with a replacement container must be available in order to continue to use the workplace can.

From GB 1 472 857 an apparatus for the disposal of liquid waste at a laboratory workstation is known. The system includes a waste receptacle, the receptacle having an inlet for a supply line, a closable suction port, and a ventilation port. The system is designed as a mobile system, which interferes with work at the laboratory workstation.

From US 5,230,374 a mobile liquid transfer device is known that operates using a closed vapor recovery system.

The invention has for its object to improve the disposal of waste in a disposal system and apparatus of the present types.

Here, working on the laboratory workstation or with the receptacle should not be affected or as little as possible. In addition, the disposal should be done with little effort and environmentally friendly. In addition, the safety of the lab technician should be increased, as a conceivable accident process takes place in a sheltered workplace.

This object is solved by the features of claim 1. Advantageous developments of the invention are described in the subclaims.

In the apparatus according to the invention, the receptacle may remain in its use position when disposing of the waste contained therein and it is also no exchange container required, because the disposal of waste can be done by suction on Absauganschluß the receptacle, which is easy to do quickly and without affecting the environment can. Working at the laboratory workplace is not or only negligibly interrupted or impaired by the disposal.

The disposal system according to the invention according to claim 8 also allows an environmentally friendly transfer of the waste materials from the receptacle into the collecting container, wherein a gas oscillation method is applied. This avoids that gases escape from the collecting container into the environment during transfer. In addition, an intermediate storage of waste is achieved in the sump, whereby the disposal costs are reduced. Another advantage is that the disposal system is suitable for multiple laboratory workstations that can be disposed of sequentially as needed.

If the receptacle is connected to a supply line with a waste spout, the advantages achieved by the invention are particularly clear, because it does not require disassembly of the in-use receptacle from the supply line and no assembly of the replacement container to the supply line in the disposal. For the disposal of vapors and gases escaping during filling of the receptacle, it is advantageous to combine the laboratory workplace with a deduction.

In further subclaims, features are included which, while avoiding the escape of vapors or gases, permit handling-friendly disposal, with rational and cost-effective disposal being achieved for one or more existing workstations.

Fig. 1

eine erfindungsgemäße Vorrichtung zum Entsorgen von flüssigen oder strömungsfähigen Abfällen mit einem Aufnahmebehälter an einem Laborarbeitsplatz in der Vorderansicht;

Fig. 2

ein Absaugsystem mit einer Pumpe und wenigstens einem Sammelbehälter für die Abfallstoffe in der Seitenansicht;

Fig. 3

das Absaugsystem in der Draufsicht;

Fig. 4

einen Großbehälter für die Abfallstoffe in der Vorderansicht;

Fig. 5

den Großbehälter in der Seitenansicht;

Fig. 6

einen hydraulischen Steuerplan für das Absaugsystem;

Fig. 7

einen hydraulischen Steuerplan für das Absaugsystem in abgewandelter Ausgestaltung;

Fig. 8

einen hydraulischen Steuerplan für das Absaugsystem in weiter abgewandelter Ausgestaltung;

Fig. 9

einen hydraulischen Leitungsplan für den Großbehälter.

The invention and further achievable by them advantages are explained in more detail with reference to preferred embodiments of the disposal system and simplified drawings. It shows

Fig. 1

a device according to the invention for the disposal of liquid or streamable waste with a receptacle at a laboratory workplace in front view;

Fig. 2

an exhaust system with a pump and at least one collecting container for the waste in the side view;

Fig. 3

the suction system in plan view;

Fig. 4

a large container for the waste in the front view;

Fig. 5

the large container in the side view;

Fig. 6

a hydraulic control plan for the exhaust system;

Fig. 7

a hydraulic control plan for the exhaust system in a modified embodiment;

Fig. 8

a hydraulic control plan for the exhaust system in a further modified embodiment;

Fig. 9

a hydraulic line plan for the large container.

Of the laboratory workstation 1 shown in Fig. 1, only parts are shown, namely a table top 2 and an intermediate bottom 3 of a work table, under which a receptacle 4 for waste material is arranged, which may be arranged below the intermediate bottom 3, as shown in FIG , The work table can be a base cabinet in which the receptacle 4 is arranged. The receptacle 4 is a closed container in the form of a canister with a container opening 5 and an inlet port 6, which is preferably arranged on the top wall 4a of the receptacle 4 and has a connecting piece 7 which projects upwards.

In the area of the laboratory workstation 1, a spout 8, preferably with a flame trap in the form of an inserted perforated plate, is provided on the table top 2, which is preferably formed by a funnel 9 with a lid 11, which is preferably foldable about a lateral hinge 12. The spout 8 is connected by a feed line 13 to the inlet port 6, which has a drain pipe 14, e.g. is connected by a transition sleeve 15 and optionally a screw connection with an outlet 16 of the funnel 9. The outlet port 16 is sealed in a through hole 17 of the table top 2. The inlet port 6 has a connection head 18 which the drain line 13 passes through sealed in a feedthrough hole 18 a, where it can end in the upper region of the receptacle 4.

The receptacle 4 also has a suction port 19 which preferably forms a common connection with the inlet port 6 and here is integrated in the connection head 18, so that the container opening 5 is provided for the inlet port 6 and the suction port 19 together. The suction port 19 has a suction line 21, here in the form of a suction pipe 21 a, which extends into the vicinity of the bottom 4 b of the receiving container 4. The connection head 18 may have a common or a respective through hole 17 for the discharge line 13 and the suction line 21, which pass through the terminal sealed. With 22, a ring seal is referred to, which is arranged between the connection head 18 and the connecting piece 7.

The receptacle 4 also has a second inlet port 23 for a vent line 24, wherein the inlet port 23 with the suction port 19 and the first inlet port 6 forms a common terminal, wherein the formed by a pipe or hose vent line 24, the connection head 18 also in the feedthrough hole 17 sealed interspersed. In Figure 1, the vent line 24 is shown visible only in its outer end region. In the region of the second inlet port 23, it is located behind the suction line 21, wherein it requires no continuation of the vent line 24 but only a ventilation opening below the second inlet port 23. In the presence of the common connection is required for the sealed connection of the lines to the receptacle 4 only the ring seal 22, between the common connection part and the receptacle 4. On the input side, so here top side, the connection head 18 each have a threaded hole 18b for a threaded coupling 18c, with which the respective line 14, 21, 24 is tightly screwed, which pass through the intermediate bottom 3 in a hole.

The receptacle 4, which forms the device designated in its entirety with 10, is permanently installed at the laboratory workstation 1. That is, there is no quick connection for releasing and reconnecting the receptacle 4 is provided, since this is not required for reasons to be described. At most, it requires a control at longer intervals, for example, to check whether solids have been deposited in the receptacle 4 and if necessary to remove them. Furthermore, the receptacle 4 can be replaced at longer intervals.

The receptacle 4 is further associated with a vent port 25 having a vent line 25a, which preferably extends in the drain line 13 and in particular in the region of the spout 8 above the outlet 16, ie above a point at which a fluid congestion can form, opens. This mouth in the area of the laboratory workstation 1 is of particular advantage when in the Area of the laboratory workstation 1 a deduction (only indicated by the arrow 25b) is provided, can be sucked and disposed of through the vent line 25a emerging and existing laboratory workstations vapors or gases. The vent port 25 is thus also integrated into the connection head 18, so that a connection to the receptacle 4 is present.

The free ends of the suction line 21 and the ventilation line 24 are each provided with a connection coupling part 26a, 27a for a suction connection line 28 and a ventilation connection line 29 which can be connected to the connection coupling parts 26a, 27a with associated connection coupling parts 26b, 27b.

The connection coupling parts 26a, 27a can be arranged on the receptacle 4. Preferably, however, they are at a distance therefrom, here at a wall 33 of the worktable or one of the receptacles 4 of the workbench receiving the same. For the purpose of rationalization of production and assembly, the connecting coupling parts 26a, 27a are preferably located on a module 34 which can be fastened to the wall 33 in the manner of a bracket. This makes it possible to pre-assemble the connecting coupling parts 26a, 27a with the module 34, so that it only requires an attachment of the module 34 to the wall 33 and the connection of the suction line 21 and the ventilation line 24.

The receptacle 4 is also associated with a level monitoring device 35 which activates an example optical or acoustic signal when the waste in the receptacle 4 reach a predetermined level. The monitoring device 35 has a sensor 36, which is held by a holder 37 outside in a specific position to the receptacle 4 and generates a control signal when a certain level is reached or triggers the signal. The holder 37 may be attached to the connection head 18, whereby an independent of the receptacle 4 positioning of the sensor 36 is achieved.

In the context of the invention, it is also advantageous to measure the level in the container 4 from above, that is to say through the container opening 5. Such a level monitoring device 35 may, for. B. are then used when the container 4 is made of a material which does not allow measurement of the level from the outside. It may be in the sensor 36 z. B. act an effector or an ultrasonic sensor. In all level monitoring devices 35, it is advantageous to this or the associated sensor 36 on the connecting part 6 and am Attachment head 18 so that the container 4 can be independently and thus easily replaced by the connector 6 with the level monitoring device 35. Simple standard containers are preferably used for the invention. If dirty or damaged the container 4 this can be easily changed, while the expensive connector can be maintained.

The extraction system 41 is arranged on a transporting carriage 41a (FIGS. 2 and 3) which has a chassis 43 resting on driving and steering rollers 42, on which one or more, preferably two, stands for one collecting container 45a, 45b are arranged Example in a chassis 46 forming the tub 46 having a bottom wall 47 and a peripheral wall 48. The trolley 41 is a manually displaceable carriage having a crossbar 49 for manual attack. On the trolley 41, a pump 51 is also arranged on a cross member 52, which is drivable by a motor, in particular electric motor, with a switch 53 in handle proximity of the cross bar 49. The pump 51 has two line connections 54, 55 which form an inlet and an outlet to which the suction connection line 28 can be connected, resulting in line sections 28a, 28b which are dimensioned so long that one line section 28a is connected to the connection coupling section 26b is detachably connectable to the connection coupling part 26a and the other line section 28b is connected to at least one collecting container 45 or detachably connectable. For this purpose, the line section 28b is formed with a connection part 56a, which can be connected to a connection part 56b at the top of the collection container 45 or in a cover 45c, for example a screw cap, whereby a tight and possibly detachable line connection 56 is formed. The at least one collecting container 45 has at the top a second, preferably comparably arranged and formed, line connection 58 with a connection part 58a for a connection part 58b of the ventilation connection line 29. Both ports 56, 58 of the reservoir 45 are preferably disposed on one and the same port part, for example on the lid 45c, so that only one port opening serves the port of the conduit portion 28b and the port end of the vent communication passage 29 facing away from the port coupler part 27b. The receiving volume of the collecting container 45 or the receiving volumes of the collecting container 45a, 45b of the same or different size, for example 30 and / or 60 liters, is or are greater than the receiving volume of the receiving container 4 in order to exploit the collecting effect can.

The trough 46 absorbs leakage, its volume corresponding to the volume or volumes of the collection container 45.

The above-described exhaust system 41 is part of a disposal system 60 (Figures 4 and 5) with a large container 61 having in its upper region two line connections 62, 63, of which the line connection 62 with the line section 28a and the connection coupling part 26b of the suction connection line 28 connectable is and the line connection 63 by the connection coupling part 27b and the vent connection line 29 with the at least one collecting container 45 is releasably connectable.

The line connections 62, 63 are preferably arranged on a cover 66 for a manhole 67. In addition, the large container 61 is associated with a filling level monitoring device 68, with which the respective filling level in the upper region of the collecting container can be determined. A signal generated by this monitoring device 68 can be used to display the filling level and / or for an operational planning that takes into account for which time the capacity of the large container 61 still suffices. The monitoring device 68 may have a float 69 whose respective height position is decisive for the respective signal output. For ease of construction, it is advantageous to integrate the monitoring device 68 in the lid 66 so that it forms a structural unit. Furthermore, in the lid region, preferably on the lid 66, a further sensor 71 may be provided which monitors the presence of the lid 66 and the correct closure of the large container 61 and generates a signal when the closure is not guaranteed.

The lid assembly designated in its entirety by 72 is preferably by a lifting device 73 optional to raise and lower, which is formed in the present embodiment by a manually operated simple roller 74 to which a pull cable 75 extends, to which the cover 66 with a Rope terminal 76 is connectable, while the other end of the traction cable 75 is preferably deflected by a arranged at a horizontal distance from the simple roller 74 guide roller 77, wherein its free end portion is used for manual attack. By hooking the free Zugseilendes, for example, an eyelet 78, in associated hooks, the lifting device 73 can be fixed in optional stroke positions or in the raised position of the lid 66. The lifting device 73 is held on a boom 79, which may be attached to a wall 81 or the like.

The large container 61 is associated with a second lid 82 and preferably held undetachably thereto, which serves the closure of the large container 61 during its removal, while the lid 66 may remain at the existing stand of the large container 61. In addition, the large container 61 at its bottom a Outlet opening 83 through which its contents can be emptied and which is selectively open and closed by a closing device, for example in the region of an example bent pipe socket 84, which preferably ends laterally. In order to better position and transport the large container 61, this is held in a frame 85 which has spaced feet 86, between which a forklift is able to retract with his fork arms. Preferably, the frame 85 on its upper side with the feet 86 positively cooperating receiving parts 87, which allow the stacking of several large container 61 with frame 85. Between the feet 86 and the receiving parts 87 preferably extend vertical support columns 88, whereby a stable construction is achieved.

The volume (for example 1000 liters) of the large container 61 is greater than the volume of the collecting container 45 or the volumes of the collecting container 45a, 45b. This is for rational disposal.

The above-described disposal facility can be subdivided into several functional areas, each of which is independently operating disposal subsystems.

The first disposal subsystem comprises the receptacle 4, which serves to receive at the laboratory workstation 1 waste generated, which can be tilted into the spout 8. When the filling level in the receptacle 4 reaches a predetermined value, the waste materials are sucked out of the receptacle 4. This first disposal system is formed by the apparatus 10.

The disposal of the waste materials of the receptacle 4 is the exhaust system 41, with the at least one collecting container 45, which forms a second disposal system, or the disposal system 60, which includes the extraction system 41 and the large container 61 and also forms a disposal system. With the suction system 41, the waste in the receptacle 4 by suction and storage in the collecting container 45 are disposed of. With the disposal system 60, the waste can be disposed of from the area of the entire laboratory, namely temporarily store in large container 61 and perform by removal of further disposal.

For sucking into the collecting tank 45, the suction connecting pipe 28 forming a liquid supply pipe and the vent connecting pipe 29 constituting a gas pipe which can be detachably or fixedly connected to the collecting tank 45 through the pipe fittings 56, 58 are included connected to the connecting coupling parts 26a, 27a. Then that happens Sucking or decanting by switching on the pump 51, wherein at the same time the displaced from the reservoir 45 air or gas quantity is automatically conveyed by overflow into the receptacle 4 in the sense of the vapor recovery process. In this case, an air or gas outlet in the region of the working as a double line connecting lines 28, 29 and the tight connections is avoided.

The above-described receptacle 4 can be arranged both in a cabinet or cabinet without or with cabinet door as well as freely in the field of laboratory workstation 1 and / or the table. If the receptacle 4 is arranged in a closed and accessible in particular by a door cabinet or base or the like, there is no need for a closed connection between the container 4 and the connection coupling part 27a. It only needs a top opening in the container 4, in particular in the common connection head 18 to be present. When sucked into the collecting container 45 whose vent gasses flows through the connection coupling part 27a in the closed receiving space in which the receptacle 4 is located, and then in the sense of an open connection due to the adjusting at the top opening suction in this opening, whereby the container vented becomes. The enclosure or substructure surrounding the receiving space or the like may be sealed in the region of its joints between its walls surrounding the receiving space, in particular its door.

It is also advantageous to assign the at least collecting container 45 to a filling level monitoring device, so that it is possible to determine when this refilling process is to be ended. Such a monitoring device can for example be optically effective in that the collecting container 45 is made of transparent or translucent material and the respective filling level is visually recognizable.

When the at least one collecting container 45 is filled, the connecting couplings 26, 27 are released, and the transporting carriage 41 a is transported to the large container 61, wherein the suction connecting line 28 and the venting connecting line 29 can remain at the collecting container 45 as parts of the extraction system 41. For sucking and transferring into the large container 61, the suction connection line 28 or its line section 28a and the vent connection line 29 are connected to the large container 61 by closing the line connections 62, 63. By switching over the switch 53 for the purpose of reversing the conveying direction of the pump 51, the suction or refilling process can then be carried out. It is not a necessary feature that the through the Pump 51 formed conveyor must be reversible. It is within the scope of the invention also possible to connect the suction connection line 28 vice versa, so that the conveying direction need not be changed. Incidentally, other physical conveyor systems are applicable.

When the large container 61 is filled, the coupling parts 26b, 27b are released from the bulk container, after which the large container 61 can be removed, optionally after solution of the lid 66 and closure by the second lid 82, and can be replaced by another large container. The transport trolley 41 comprehensive disposal subsystem 41 is then available for further use.

The connection couplings 26, 27 and the line connections 62, 63 and preferably also the connections 56, 58 with their connection parts are preferably quick couplings whose coupling or connection parts 26a, 26b, 27a, 27b, 62a, 63a, 56a, 56b, 58a, 58b each have a closure mechanism which automatically opens when coupling or connecting the associated line and automatically closes when uncoupling or loosening, so that neither waste nor a gas can escape. Such couplings or line connections are known per se, so that it requires no further explanation of the coupling parts or connecting parts.

In the context of the invention may optionally or additionally one or more sensors may be provided, which physical parameters, eg. As pressure, temperature or concentration of the waste, in the large container 61 measure and, if necessary, trigger an alarm by means of an alarm device or generate a signal to switch off the associated pump 51. The collection of waste may cause a chemical reaction with undesirable consequences in the waste. Such a reaction can be reliably detected by a suitable sensor and alarmed in the manner described above. Again, it is advantageous to the holder of an associated monitoring device 68 a, z. As the holder for the associated sensor to attach to the connecting part or cover 66 and not on the large container 61. In this way, the holder itself and a container change is simplified because the monitoring device with the connecting part or the lid 66 can be solved and on Space can remain. Such a monitoring device is also advantageous for the container 4 or the collecting container 45 or the collecting containers 45a, 45b. As already described, such a sensor with respect to the associated container 4, 45, 61 from the outside or from above through the container opening to be effective.

The embodiments according to FIGS. 6 to 9, in which identical or comparable parts are provided with the same reference numerals, function or differ from the above-described exemplary embodiments as follows:

On the one hand, the large container 61 according to FIG. 9 can be assigned its own conveying or suction pump 91, for example in a line section 92 adjoining its line connection 62, which can extend into the bottom area of the large container 61, the pump 91 can be arranged in an essay 93 of the large container 61 and its lid 66. A vent line section 94 extending from the upper region of the cavity of the large container 61 to the line connection 63 is also shown. When transferring between the collecting container 45 and the large container 61, the pump 91 is used in the embodiment of FIG. 6, wherein the pump 51 is bypassed with a bypass line. For this purpose, a pump 51 bypassing bypass 28c may be provided in the connecting line 28, at one of its two connection points by a directional control valve 95, z. B. a 3/2 way valve or a 3-way ball valve, so preferably connected to the line section 28b, that the bypass 28c is locked in the one switching position and the flow according to arrow 96 and in the other switching position, a line passage from the line section 28b by the bypass 28c to the line section 28a is present, see arrow 97. When transferring between at least one collecting container 45 and the large container 61, the directional control valve 95 is switched or adjusted by an unillustrated electrical control device or by hand, that the pump 91 through the bypass 28c can perform the suction, wherein this transfer takes place according to the vapor exchange method. As FIG. 6 shows, the rest of the at least one collecting container 45 can have a monitoring device 35, 68 or 68a, which is preferably attached to the associated connecting part or cover 45c. A suitable sensor may be connected by a signal line 98 to the pump 51, so that the promotion can be switched off when a condition for the waste in the sump 45 is not met, z. B. the maximum level is reached or an unwanted chemical reaction takes place.

In the embodiment of FIG. 7, in which also the same or comparable parts are provided with the same reference numerals, corresponds to the embodiment of FIG. 6, but the connecting lines 28, 29 at the same time to two preferably equally large collection container 45 a, 45 b connected, which by appropriate Branching line sections 28d, 29a takes place, which are each connected by prescribed line connections 56, 58 with the collecting tanks 45.

The embodiment of FIG. 8, wherein the same or similar parts are provided with the same reference numerals, allows a transfer of the waste material from at least one collecting container 45 in the large container 61, wherein an external pump, for. B. the pump 91 in the embodiment of FIG. 9, is not required. In this embodiment, which is a further development of the embodiment of FIG. 6 or 7, another Beipass 101 is provided, which is connected at its one end by a directional control valve 102 with line section 28a between the junction 103 for the first bypass 28c and the pump 51, and at its other end to the line section 28b is connected between the directional control valve 95 and the line connection 56, see line section 28bl. The directional control valve 102 is a 3/2-way valve which, in combination with a directional control valve 95 designed as a 3/3-way valve, makes possible the following flow passages and functions:

In a switching position of the directional control valve 95 in the sense of a flow passage 96 in the line section 28b and at a switching position of the directional control valve 102 in the sense of a flow passage of the arrow 104 in the line section 28a, the internal pump 51 can be used for transferring or filling in the at least one intermediate container 45, z. B. to empty the waste container 4.

In a switching position of the directional control valve 95 in the sense of a flow passage 105 between the line section 28b and the bypass 28c and a switching position of the directional valve 102 in the sense of a flow passage 106 between the bypass 101 and the line section 28a in the flow direction to the pump 51, the at least one intermediate container 45 can be emptied be or can be transferred from it into the large container 61.

In addition, optionally in a switching position of the directional control valve 95 in the sense of a flow passage 97 between the line section 28b2 extending between the sump 45 and the directional valve 95, and the bypass 28c, the at least one collecting container 45 in the large container 61 with an external pump , z. B. pump 91, take place.

In all embodiments, it is advantageous to form the suction connection line in the associated collecting container 45 so long that it extends into the bottom region of the collecting container 45. When filling the collecting container 45, this does not harm, and it is a rippling of the liquid prevented. When decanting into the large container 61, this configuration can easily fulfill their suction function.

Claims (15)

1. A device for disposing of liquid waste substances at a laboratory workstation (1), having a receptacle (4) for receiving the waste substances which is associated with the laboratory workstation (1) and comprises an inlet (6) with a feed pipe (13) for the waste substances, the receptacle (4) comprising a suction connection (19) on a suction pipe (21), which may be opened and closed as desired, the receptacle (4) further comprising a ventilation hole or ventilation connection (23) at the top,
   characterised in that
   the suction pipe (21) extends from the base area of the receptacle (4) to the suction connection (19), and the suction connection (19), the inlet (6) and the ventilation hole or ventilation connection (23) are incorporated into a common connector (18).
2. A device according to claim 1,
   characterised in that
   the feed pipe (13) is connected with a drain (8) arranged above the receptacle (4), preferably on a bench top (2) of a workbench.
3. A device according to claim 1 or claim 2,
   characterised in that
   the suction connection (19) comprises a coupling (26) to which a liquid pipe (28) may be connected.
4. A device according to any one of the preceding claims,
   characterised in that
   the ventilation connection (23) comprises a coupling (27) for a gas pipe (29).
5. A device according to any one of the preceding claims,
   characterised in that
   a level sensor (36) is provided for the receptacle (4).
6. A device according to claim 5,
   characterised in that
   the level sensor (36) is arranged externally and in particular on the connector (18).
7. A device according to any one of the preceding claims,
   characterised in that
   a mobile disposal system (41) is provided, which comprises at least one collecting vessel (45) and the liquid pipe (28) connected with a pump (51) and preferably also the gas pipe (29), which are or may be connected to the collecting vessel (45).
8. A disposal system having a device according to any one of claims 1 to 7, and moreover having at least one mobile collecting vessel (45), having a liquid pipe (28), which may be connected at its one end by a coupling (26) to the suction connection (19) and is or may be connected at its other end to the collecting vessel (45), and is connected to a pump (51) for conveying the waste substances out of the receptacle (4) into the collecting vessel (45), and having a gas pipe (29), which may be connected at its one end to the ventilation connection (23) by a coupling (27) and may be or is connected at its other end to the collecting vessel (45).
9. A disposal system according to claim 8,
   characterised in that
   a large container (61) is provided, which may be connected by pipe connections (62, 63) to a liquid pipe and to a gas pipe, which are or may be connected to the collecting vessel (45), wherein the liquid pipe is connected to a pump for conveying the waste substances from the collecting vessel (45) into the large container (61).
10. A disposal system according to claim 9,
    characterised in that
    the couplings (26, 27) and the pipe connections (62, 63) each comprise two coupling parts or pipe connection parts which may be connected together, into which in each case a closure mechanism is incorporated, which opens up the passage through the pipe in the connected state and closes it in the detached state.
11. A disposal system according to claim 9 or claim 10,
    characterised in that
    only one liquid pipe (28) and only one gas pipe (29) are provided, which may be connected as desired with the receptacle (4) and the large container (62).
12. A disposal system according to any one of claims 8 to 11,
    characterised in that
    a plurality of collecting vessels (45) are provided, which are connected to the liquid pipe (28) via branch piping.
13. A disposal system according to any one of claims 8 to 12,
    characterised in that
    the collecting vessel(s) (45) is/are arranged on a trolley (51a).
14. A disposal system according to any one of claims 9 to 13,
    characterised in that
    a level monitoring device is associated with the large container (65).
15. A laboratory workstation having a device according to any one of claims 1 to 7, and further having a drain (8), which is arranged at the laboratory workstation (1), wherein the inlet (6) is connected to the drain (8) by the feed pipe (13).

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