EP2194005B1

EP2194005B1 - Device for separating/retaining leakage water

Info

Publication number: EP2194005B1
Application number: EP09398017.5A
Authority: EP
Inventors: Manuel Pedro Barbosa
Original assignee: Sopsa-Representacoes E Comercio Lda
Current assignee: Sopsa-Representacoes E Comercio Lda
Priority date: 2008-12-02
Filing date: 2009-12-02
Publication date: 2016-05-11
Anticipated expiration: 2029-12-02
Also published as: EP2194005A1; PT10380T

Description

Scope of the invention

This invention relates to a device for separating and retaining liquids resulting from urban waste (refuse) deposits in surface, buried or semi-buried containers.
The system wherein the device is integrated consists of a buried or semi-buried polyethylene pit with a variable volumetry (usually from 1 to 5 m³), which is covered by a polyethylene or other material lid, whose partial opening allows the refuse to be introduced by the user into a removable bag, which is then put inside the pit, having the same volumetry of the latter.
By using special equipment, the household-refuse collection services will regularly remove the said bag from within the pit and discharge its whole content into an appropriate loading vehicle.

Prior art

According to the current state of the art, there is not a practical and effective way of ensuring that the liquid portion of the waste (refuse) deposited in the containers is separately retained. As a consequence, deposits are formed at the bottom of the containers (which must be regularly removed by using suction pumps or other not so practical means) and there are often incidental leakages in the public highway during the daily collection operation. Furthermore, WO 2006/032073 A1 discloses a waste collecting system using removable storage bags.
The most similar document to this invention is the WO 2008/104660 , which relates to a process for degrading waste in an assembly that comprises at least one container, said process comprising the following steps: depositing the waste in the container; and recovering the lixiviate from the housing into a basin. The process is characterized in that it further comprises the step of sequentially humidifying the waste in the container by dispensing a liquid that contains the collected lixiviate. As can be concluded from the above, the said invention is completely distinct from the one which is now applying for protection. Actually, it is a process by which lixiviates are collected, rather than a bag allowing lixiviates to be separated/retained. Furthermore, as can be understood when reading the description of the said patent's process, lixiviates are collected in containers and not in bags, this feature not only distinguishing both technologies but also making the said device to be much more complex and costly than the object of this invention.

Summary of the invention

With the invention as defined in appended claim 1, which is the object of this patent application, the use of the urban waste collection system can be substantially improved, thus avoiding all the cleaning operations above mentioned and also offering to the collection services the possibility to transport liquids (lixiviates) and solids separately until arriving at the usual place of discharge.
The device for separating and retaining lixiviate preferably comprises the following:

1) One bag/sleeve made of impervious PVC canvas, attached to an aluminium ring;
2) Eight stainless steel loops/eyelets at the lower end of the bag/sleeve;
3) One polyethylene rope/cable;
4) A cable fast trapping mechanism of the ClamCleat-type
5) A set of pulleys and loops, serving to guide and aid the sliding of the cable.

It should be noted that this device operates together with the solids' retention bag, which largely contributes to the formation of the liquids deposit ("trunk") and to the separation of both, solids and liquids.

Brief description of the drawings

The following description is based upon a preferred embodiment that is illustrated in the enclosed drawings, these drawings representing with a non-limiting character:

Figure 1, a view of the device in the position for retaining solids and liquids;
Figure 2, a view of the device in the position for emptying liquids; and
Figure 3, a view of the device in the position for discharging solids.

Detailed description of the invention

As can be observed, the combined device for separating/retaining lixiviates, which was designed to be integrated in a urban solid waste collection system being introduced in surface, buried or semi-buried containers, is basically characterized in that it is comprised of an outer bag (1), an impervious inner bag (2) which is provided with a trunk (5), both bags being fastened to a metallic ring, and the opening and closing means (7 and 8) of the said bags.
The above mentioned trunk (5) of the inner bag (2) is projected outward from the outer bag (1), through a hole which is arranged at the bottom of the said outer bag (1), and it is kept in a raised position for retaining the liquids (figure 1) and assumes a discharge position for releasing the said liquids (figure 2), these two positions being activated by means of a cable (6).
In Figures 1 to 3, the operation of the combined device can be observed, which is hereunder explained in more detail:

The phase A, "separate retention of solids and liquids", represents the fully closed set of 2 bags (1 and 2), wherein the separate retention of solids and liquids is shown;
The phase B, "discharge of liquids", represents an intermediate state in which the outer bag (1) remains closed and the impervious inner bag (2) that contains the liquids is in the discharging position;
The phase C, "discharge of solids", represents the full opening of both bags (1 and 2) and the resulting discharge of solids.

The opening and closing means provided with the bags comprise eyelets (7 and 8), to the outer (1) and inner (2) bags respectively, in addition to cables passing through the said eyelets.
The impervious inner bag (2) is made of PVC and is placed inside the solids retention bag (1), thanks to a system of eyelets (7 and 8) (being sewed at an area next to each end of each one of the bags (1) and (2)) through which will pass the polyethylene cables being controlled by the system's operator by means of a cable fast trapping mechanism (3) and (4). The said bag (2) forms in its end a "trunk" (5) which will serve as a deposit for the existing liquids in the system. The separate handling of this "trunk" (5) whose opening/closure is the operator's responsibility, is in fact very easy thanks to the system of loops and pulleys provided for that purpose at the top and fixed to the aluminium ring (6).
With reference to Figure 1, the importance of the trapping mechanisms of the rope/cable and of the eyelets/pulleys which guide the sliding of the cable can be understood, since they allow the user to not only lift and lower the "trunk" of the liquids deposit, but also create separate retention sections.
The invention is integrated in a urban waste (refuse) storage system, which is comprised of a container and of the relevant polyethylene lid, wherein a set of two bags/sleeves is introduced and attached to an aluminium ring which sustains them by fitting to the mouth of the container.

Captions cf the figures

Caption 1 corresponds to the outer bag/sleeve;
Caption 2 corresponds to the impervious inner bag/sleeve;
Caption 3 corresponds to the fast acting mechanism for rope - opening/closure control of the impervious inner bag and of the trunk/liquids deposit;

Caption 4 corresponds to the fast acting mechanism for rope - opening/closure control of the outer bag;
Caption 5 corresponds to the "trunk" which is formed at the lower end of the impervious inner bag serving as a liquids' deposit;
Caption 6 of the Figure 1 corresponds to the set of eyelets/loops/pulleys comprising the lifting system of the trunk;
Caption 7 corresponds to the set of loops/eyelets wherein the rope slides in order to allow for the closure/opening of the outer bag;
Caption 8 corresponds to the set of loops wherein the rope slides in order to allow for the closure/opening of the impervious inner bag and of its trunk;
Caption 9 corresponds to the solid waste which is stored in the bag;
Caption 10 corresponds to the liquids retained in the trunk/deposit of the impervious bag.

Claims

A device for retaining and separating lixiviates, which is designed to be placed in a surface, buried or semi-buried container of an urban solid waste collection system, the device comprising an outer bag (1) and an inner bag (2) attached to a metallic ring for fitting to the mouth of the container, the inner bag being liquid-tight and provided with a trunk (5), said trunk (5) of the inner bag (2) being projected outward from the outer bag (1) through a hole which is arranged at the bottom of the said outer bag, opening and closing means (7 and 8) of the said bags which consist of eyelets (7 and 8), respectively to the outer bag (1) and inner bag (2), and cables passing through the said eyelets; said trunk (5) being maintained in a raised position for retaining liquids and adopting an unloading position for releasing the said liquids, these two positions being activated by means of a cable (6).
A device for separating/retaining lixiviates according to claim 1, characterized in that the bags (1 and 2) have dimensions preferably with a volumetry of 1 to 5 m³ according to the type of containers.
A device for separating/retaining lixiviates according to claim 1, characterized in that the outer bag (1) is made of PVC canvas and the said cables are of polyethylene.
A device for separating/retaining lixiviates according to the claim 1, characterized in that it includes a trapping system (3) of the cable which is aimed at controlling the inner bag (2) and the respective trunk (5).