ES2679719B1 - REMOVABLE MODULE AND SYSTEM OF REMOVABLE MODULES FOR THE TREATMENT OF WASTEWATER - Google Patents

Description

DESCRIPTION

REMOVABLE MODULE AND SYSTEM OF REMOVABLE MODULES FOR THE

SEWAGE TREATMENT

FIELD OF THE INVENTION

The present invention is part of the technical field corresponding to the sector of the purification of urban, agricultural and industrial wastewater. More specifically, the invention relates, although without limitation, to the purification of wastewater generated in small urban centers, or in isolated locations.

BACKGROUND OF THE INVENTION

Within the technical field of the purification of urban, agricultural and industrial wastewater, it is common to provide the wastewater treatment systems with pre-treatment infrastructures, where previous stages of sanitation of waters containing considerable amounts of coarse material are carried out. , suspended solids and floating substances. A pre-treatment system is especially advantageous in the case of isolated industrial sites, agricultural and livestock farms or most small urban agglomerations that do not have a separative network of water and where sewage treatment plants have to be treated. admit the rainwater load.

Said pre-treatment systems typically consist of a completion of filtering and purification phases of water of the type: slabs, grit chambers, oil and grease separators or equivalent function technologies. In most cases, the pre-treatment systems include different compartments, modules or tanks in succession and a downstream distribution for the use of the force of gravity as an energy source and thus transport water from one compartment to another contiguous one. Some wastewater treatment systems of this type are described in patent applications WO 2012/163308 A2 and FR 2889518 B1.

At present the systems of roughing, channels of sedimentation or desarenadores and desgrasadores-decanters are usually built in the form of pit or channel of concrete or other materials, or as compact systems of plastic materials. The roughing modules, desarenadores and decanters in many cases have to be periodically emptied manually, and an operator must enter the installation for it. In the case of degreaser-decanter modules, depending on their dimensions, they are usually cleaned of floating substances manually or with automated devices such as suction devices. In both cases it is required that specialized personnel either come into contact with the substances or waste water, or directly must be introduced into the module for proper maintenance.

As an alternative to these cleaning situations, there have been devised, for example, industrial sewage treatment plants, such as that disclosed in the patent application WO 2012/163308 A2, which are designed so that part of the maintenance and cleaning work they are carried out by means of purging by means of hoppers located at the bottom of the tanks, connected to solid evacuation routes. However, although part of the evacuation of accumulated waste in the compartments can be done in this way, these plants are designed so that an operator is introduced into each tank to perform repairs or maintenance and cleaning maneuvers.

At other times, as in the case of the domestic wastewater processing system disclosed in patent application FR 2889518 B1, which includes compartments arranged in a pit, cleaning them is done by drainage or directly replacing the waste media. processing and equipment of these compartments, especially when they are saturated with pollutants. In this case, a manual intervention is also needed for the maintenance and cleaning of the compartments.

Additionally, although the known wastewater pre-treatment systems allow certain cleaning and maintenance needs to be resolved, they are not yet exempt from the technical problem of providing a pre-treatment system suitable to be adapted to all kinds of treatment plants, including small water treatment plants; and whose maintenance can be carried out easily, quickly and cleanly by non-specialized personnel.

With the limitations described in the previous paragraphs it is necessary, in the present technical field, to provide a wastewater treatment or pre-treatment system, whose efficiency in cleaning and maintenance improves the known solutions of the state of the art. On the other hand, the system is required at the same time offer substantial advantages in terms of sustainability and economic competitiveness, especially important in the treatment of wastewater from small towns or small facilities where limited economic resources make it difficult to install and maintain water sanitation infrastructures, while enabling maintenance be carried out by non-specialized personnel easily, quickly and cleanly.

For this purpose, the present invention thus proposes a wastewater treatment system designed, although without limitation, for its implementation in sewage treatment plants of small towns or small installations, whose technical realization allows to overcome the problems detailed above.

BRIEF DESCRIPTION OF THE INVENTION

An object of the present invention refers, but without limitation, to the development of a wastewater treatment module, suitable for housing it in a chamber of a purification system, where said module comprises:

- a main space for housing water by filling it;

- an overflow that allows the water to escape from the module, reaching a certain level of filling of its main space;

- Water treatment media of roughing, decanting and / or separation of materials.

Advantageously, said module is removable from the space defined by the box, and comprises latching elements for the realization of its extraction from the box where it is housed, so that its emptying, cleaning and maintenance can be carried out quickly and easily. simpler than in the systems known from the state of the art.

In a preferred embodiment of the invention, the module further comprises one or more support elements for support in an auxiliary support structure for its overturning and / or emptying. This is achieved by carrying out maintenance and / or cleaning operations without the need for manual intervention. This situation is especially advantageous, for example if the substances within the module are toxic.

In a preferred embodiment of the invention, at least one of said overflows comprises a drain hole, which allows waste water to exit the module.

In a preferred embodiment of the invention, at least one of said overflows comprises a connection flange, making the module connectable to another.

In a preferred embodiment of the invention, at least one of said overflows comprises a recess for its connection downstream with another adjacent module.

Another object of the invention relates to a wastewater treatment system comprising two or more modules according to any of the embodiments described herein, and at least one connection between the modules through one or more of the overflows.

In a preferred embodiment of the invention, the connections of said overflows follow a distribution downstream along the modules. This achieves the use of the force of gravity for the distribution of water through two or more modules for its purification in stages.

In a preferred embodiment of the invention, the system comprises at least one roughing module. More preferably, said roughing module of the system comprises a filtering screen for residual water particles. This is achieved by separating the coarse particles from the waste water and at the same time this roughing module serves as the first sediment decanter.

In a preferred embodiment of the invention, the wastewater treatment system comprises at least one settling module, where the bottom of the module itself is the water purification means, through the force of gravity.

In a preferred embodiment of the invention, the wastewater treatment system comprises at least one material separation module.

In a preferred embodiment of the invention, the material separation module comprises at least one grease separator wall that extends from the top to a certain depth of said module, so that it does not reach connect to the bottom of the same, to retain materials in flotation and make way for filtered water below said partition.

Another object of the present invention relates to a wastewater treatment plant comprising a wastewater treatment module or a wastewater treatment system according to any of the embodiments described herein.

The invention thus allows to propose a solution for pre-treatment of wastewater through a module, system or water treatment plant whose dimensions are perfectly scalable to adapt it to the needs of any case by expanding the size of the modules and / or by increasing the number of modules of each type arranged in series. The invention enables the extraction of the modules and, preferably, the pouring of their contents into an adjoining surface, container or means of transport. This allows the maintenance of these modules in a clean, fast and adapted to the needs of the site. This means that the operator in charge of maintenance must not come into contact with the substances to be treated or physically enter the infrastructure for such maintenance. The invention is especially functional and suitable for small-scale treatment plants whose managers wish to carry out an operation with their own non-specialized personnel in a sustainable manner.

In this document, the term "treatment" will be used generically to designate, indistinctly, both the wastewater treatment operations carried out by the system of the invention, and the pre-treatment operations, where said system is responsible for carrying carried out one or more stages previous to other subsequent stages carried out by additional treatment systems. The modules and the system of the invention are also of preferential application for the treatment of rainwater or sewage, or for the treatment of industrial waters.

DESCRIPTION OF THE FIGURES

Figure 1 shows a profile view of the wastewater treatment system comprising five treatment modules, according to a preferred embodiment of the invention.

Figure 2 shows a perspective view of the wastewater treatment system comprising three treatment modules, according to a preferred embodiment of the invention.

Figure 3 shows a perspective view of the emptying stage of the extractable treatment modules, according to a preferred embodiment of the invention.

NUMERICAL REFERENCES USED IN THE FIGURES

In order to help a better understanding of the technical characteristics of the invention, the aforementioned Figures 1-3 are accompanied by a series of numerical references where, with illustrative and non-limiting character, the following is represented:

DETAILED DESCRIPTION OF THE INVENTION

The following is a description of a preferred embodiment of the present invention, provided for illustrative purposes but not limiting thereof.

A principal object of the invention relates, as described in the preceding sections, and as represented in Figures 1 and 2 of this document, to a wastewater treatment system preferably comprising a set of treatment modules (1a, 1b, 1c, 1d, 1e), where the different phases of filtering and purifying water are carried out by means of purification and treatment means provided for this purpose, preferably being a system with a modular distribution "waters down". The modules (1a, 1b, 1c, 1d, 1e) are partially open to enable water flow. In each module (1a, 1b, 1c, 1d, 1e) are arranged: an overflow (2), a plurality of latching elements (3) and support elements (4).

The overflows (2) of the modules (1a, 1b, 1c, 1d, 1e) allow the water outlet of the module (1a, 1b, 1c, 1d, 1e), reaching a certain level of filling of its main accommodation space (12) (Figure 1), said main space (12) being understood as the volume intended to receive the water to be treated in each module (1a, 1b, 1c, 1d, 1e). The overflows (2) can, in a preferred embodiment of the invention, be arranged in the form of connecting tabs (Figure 2) that allow the coupling between two or more adjacent modules (1a, 1b, 1c, 1d, 1e) of the system.

The coupling elements (3) are arranged in each module (1a, 1b, 1c, 1d, 1e) for removal, for example through an auxiliary lifting or hoisting system, such as a crane, boom, hoist, etc. .

The support elements (4) allow, after the removal of the module (1a, 1b, 1c, 1d, 1e), this can rest on an auxiliary support structure (11), so that the module (1a, 1b, 1c , 1d, 1e) can, for example, tip over, allowing it to be emptied and cleaned (Fig.3).

The system also comprises a box (5) where the modules (1a, 1b, 1c, 1d, 1e) are arranged and which has two orifices (6, 7) for the passage of water, one for inlet (6) and another for output (7) as shown in Figure 1.

In a preferred embodiment of the invention and as shown in Figures 1 and 2, the system includes three types of modules (1a, 1b, 1c, 1d, 1e) with different treatment functions, open at the top, which are They are placed in series to be traversed by the residual water by overflowing one module (1a, 1b, 1c, 1d, 1e) to the next. In a preferred embodiment of the invention, each module (1a, 1b, 1c, 1d, 1e) has three walls of greater height and a fourth wall, adjacent to the next module (1a, 1b, 1c, 1d, 1e), of lower height than the others and provided with an overflow (2) designed in such a way that a treatment module (1a) is interconnected with another adjacent module (1b), successively. The last module (1e) connects with the outlet orifice (7) of the box (5), to transfer the waste water allowing a "downstream" distribution.

The system comprises, preferably and according to Figure 1, a roughing module (1a), two decanting modules (1b, 1c), two separating modules (1d, 1e) of fats and oils.

In this preferred embodiment, the first roughing module (1a) is provided with a grate (8), according to the needs, which separates the coarse particles from the waste water and at the same time serves as the first sediment decanter.

The intermediate modules are two decantation modules (1b, 1c), whose function is to enhance the decantation / sedimentation of gravel, sands and other sediments thanks to the effect of minimizing the speed of water exerted by its walls.

The final modules are two separator modules (1d, 1e) of oils and fats each provided with two internal partitions (9,10) that go from wall to wall, arranged transversely to the direction of water circulation. In a preferred embodiment of the invention, a first lower partition (9) extends from the bottom of the container to substantially 3/4 of the height thereof, promoting the settling of particles of higher density than water, in the background of a first compartment and forcing the water to circulate through the upper part (Fig. 1). The second upper partition (10) extends from the top to a depth of approximately 1/4 of the height of the sheet of water measured from the bottom, being responsible for retaining the oils, fats and foams that will remain floating in the upper part and forcing the water to pass through the free space in the bottom to go back up behind the partition (10) to the overflow (2) that gives way to the water until the next separator module (1e) of oils and fats, where the same process described above takes place. Finally, from this final separator module (1e) the water overflows to the outlet orifice (7) of the pre-treatment system.

Figure 3 schematically represents the dump / dump stage after the extraction and removal of the treatment module (1a, 1b, 1c, 1d, 1e) proposed for this preferred embodiment of the invention. In this situation, the latching elements (3) serve to by means of a crane or other mechanism, connect the module (1a, 1b, 1c, 1d, 1e) to the crane and remove the module (1a, 1b, 1c, 1d, 1e) arranged in the box (5) for its deposition in an auxiliary fastening structure (11) that allows the overturning, emptying and cleaning of the module (1a, 1b, 1c, 1d, 1e). In this case, the support elements (4) serve to make said support on the auxiliary fastening structure (11).

Alternatively, the dimensions of the system are perfectly scalable to adapt it to the needs of any case by expanding the size of the modules (1a, 1b, 1c, 1d, 1e). Alternatively, the system may comprise more modules (1a, 1b, 1c, 1d, 1e) of treatment or a smaller number of modules (1a, 1b, 1c, 1d, 1e), as shown in Figure 2.

Optionally, other water purification and filtering means can be implemented in the modules (1a, 1b, 1c, 1d, 1e) of the system.

Another object of the invention relates to a wastewater treatment plant where a system of modules (1a, 1b, 1c, 1d, 1e) of treatment as described above is arranged.

Another object of the invention relates to a treatment module (1a, 1b, 1c, 1d, 1e) which can be used individually, for example, in a rainwater treatment chamber, and which is removable for its maintenance and cleaning.

Claims (13)

1. - Module (1a, 1b, 1c, 1d, 1e) of wastewater treatment, suitable for housing in a chamber (5) of a purification system, where said module (1a, 1b, 1c, 1d, 1e) ) comprises: - a main space (12) for receiving water by filling it; - an overflow (2) that allows the water outlet of the module (1a, 1b, 1c, 1d, 1e), reaching a certain level of filling of its main space (12); - treatment means (8, 9, 10) of water of roughing type, decanting and / or separation of materials; characterized by that - said module (1a, 1b, 1c, 1d, 1e) is removable from the space defined by the box (5), and comprises latching elements (3) for carrying out its extraction from said box (5). 2. - Module (1a, 1b, 1c, 1d, 1e) of wastewater treatment, according to the preceding claim, wherein the module (1a, 1b, 1c, 1d, 1e) further comprises one or more support elements (4 ) for its support in an auxiliary support structure (11) for its dumping and / or emptying. 3. - Module (1a, 1b, 1c, 1d, 1e) according to any of the preceding claims, wherein at least one of said overflows (2) comprises an exit orifice (7). 4. - Module (1a, 1b, 1c, 1d, 1e) according to any of the preceding claims, wherein at least one of said overflows (2) comprises a connection flange suitable for coupling to a module (1a, 1b, 1c) , 1d, 1e) contiguous. 5. - Module (1a, 1b, 1c, 1d, 1e) according to any of the preceding claims, wherein at least one of said overflows (2) comprises a recess for its connection downstream with another module (1a, 1b, 1c, 1d, 1e) contiguous. 6. - Wastewater treatment system comprising two or more modules (1a, 1b, 1c, 1d, 1e) according to any of the preceding claims, and at least one connection between the modules (1a, 1b, 1c, 1d, 1e) through one or more of the overflows (2). 7. - System according to the preceding claim, wherein the connections of said overflows (2) follow a distribution downstream along the modules (1a, 1b, 1c, 1d, 1e). 8. System according to any of claims 6-7, comprising at least one roughing module (1a). 9. System according to the preceding claim, wherein the roughing module (1a) comprises a grid (8) for filtering residual water particles. 10. - System according to any of claims 6-9, comprising at least one decanting module (1b, 1c) where the very bottom of the module (1b, 1c) is the means of water purification, through force of gravity. 11. - System according to any of claims 6-10, comprising at least one separation module (1d, 1e) of materials. 12. - System according to the preceding claim wherein the separation module (1d, 1e) of materials comprises at least one partition (9, 10) fat separator extending from a top to a certain depth of said module (1d, 1e), in such a way that it does not connect to the bottom of the same, to retain materials in flotation and to allow passage to the filtered water below said partition (9, 10). 13. - Wastewater treatment plant comprising a module (1a, 1b, 1c, 1d, 1e) according to any of claims 1-5 or a system according to any of claims 6-12.