ES1273069U - EQUIPMENT FOR THE CHARACTERIZATION OF THE POLLUTANT CARGO PRESENT IN WASTEWATER (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Equipment for characterizing the pollutant load present in wastewater, which consists of a protective casing (1) that rests on a base (2) and which internally comprises a tower (5), where the protective casing (1) It comprises a hinged cover (11) for access to the upper part of the tower (5) where there is a vertical cavity (51) for the introduction of a test tube (P) with a sample of residual water; where the team is also characterized by comprising: a rotating wavelength selector disk (3), which is constituted by a circular casing (33) internally comprising a disk (31) with a plurality of diodes (31A) and with a circular printed circuit board; a circular support (32) perforated with a plurality of through holes (32A) where the disk (31) is mounted on the circular support (32) and the diodes (31A) are inserted into the through holes (32A); It comprises a motor (35) that rotates the axis of the perforated support (32); and a circular closure coupling (34) that closes the rotating disk assembly (3); where the rotating disk comprises a self-positioning system located between the circular casing (33) and the rear part of the circular support (32), which is made up of at least one wheel (36) that rotates freely located parallel to the circular support (32) and distanced from the axis of rotation, and at least one lever limit switch (37); where the wheel (36) drives the limit switch (37) due to the movement generated by the motor (35); a vertical displacement mechanism (4), which is constituted by a T-shaped guide (41) and a spindle (42), located on the sides of the tower (5), where the spindle is connected on its upper external to a vertical guide support (43) that moves along the T-shaped guide (41), where two spindles (42) at its lower end are connected to drive motors (44) located at the base (2) with a motor-spindle coupling (45), and where at an intermediate point of each spindle there is a connector (48) with vertical displacement, where the circular casing (33) of the length selector rotary disk (3) is connected; and where the tower (5) comprises, in addition to the vertical cavity (51), a circular channel (52) and perpendicular to the cavity (51), where at one of its ends there is an opening coinciding with a through hole (32A) of the circular support (32) that houses a diode (31A) and where its opposite end coincides with the test piece; and where the tower (5) also comprises a photosensor (53), aligned with the circular channel (52); where the photosensor (53) is in connection with a programmable control module (22) where the data collected by the photosensor when the light passes through the test tube (P) is managed and the sample is characterized. (Machine-translation by Google Translate, not legally binding)

Description

DESCRIPTION

EQUIPMENT FOR THE CHARACTERIZATION OF THE PRESENT POLLUTANT CARGO

IN WASTEWATER

Invention field

The present invention refers to a device capable of characterizing by spectrophotometry the pollutant load present in wastewater, subjecting the samples to be analyzed to multiple wavelengths by means of a selector device consisting of a rotating disk composed of a multiplicity of diodes light emitters (LEDs) arranged concentrically, which are automatically aligned with the sample by means of a motorized vertical and rotational displacement system. The equipment object of the present invention has the particularity, in addition to its structure differentiated from other known equipment, that it does not make use of optical elements, such as filters or diffraction gratings, and is capable of decomposing and selecting a wavelength isolated using mathematical models.

The invention falls within the industrial sector related to the different equipment, device and / or systems for performing spectrophotometric analysis on water samples, specifically, in the present invention, on wastewater samples.

State of the art of the invention

It is known within this industrial sector that the characterization of the pollutant load of wastewater requires the use of various equipment, chemicals and different procedures to carry out its analysis, which can only be carried out by personnel with extensive knowledge in the field. . This determination requires subjecting the water samples to a prior preparation, and requires waiting long periods of time for the physicochemical reactions that allow the quantification of a certain contaminating parameter to take place.

For this reason, there is a technical problem that this process prevents real-time analysis from being carried out. In addition, parameters such as the Biochemical Oxygen Demand at 5 days, (BOD5), require the analysis to be carried out 5 days after taking the sample, in order to know what the oxygen consumption is by the microorganisms present in the water. This results in low levels of productivity, cost overruns, as well as a greater environmental impact due to the chemical substances used to determine the various parameters. Another additional drawback is the complexity and inefficiency of the procedures for determining the polluting parameters by means of conventional methods, for example, the procedure for calculating the Chemical Oxygen Demand (COD), for example, by means of the simplified procedure of Micro-COD.

In order to solve these problems, various devices are known to solve these problems, where they base their operation on spectrophotometric analysis on water samples by means of incandescent xenon, deuterium or tungsten lamps, as well as LED technology. This emitted light is channeled to the sample under study until it hits a sensor, where, based on the spectrophotometric information recorded, and through mathematical models, it estimates various pollutant load parameters, allowing a simplification in the process and greater speed. in characterization.

What is disclosed in document CN109374555A is known, which describes a system that comprises a vertical rotating structure formed by a printed circuit board and multiple LEDs located along the perimeter edge of the disk. In turn, the water samples to be analyzed are arranged in another horizontal rotating structure so that the light from the LEDs falls on them through circular channels. A photodiode receives the optical signal, digitizes it and amplifies it, obtaining the absorbance by comparing it with a reference sample, commonly distilled water. The present invention is constituted by a differentiated structure and that presents, for example, internal vertical displacement means not arranged in that antecedent and, therefore, both the structure of the system itself, as well as the operating process of the same, differs from the one arranged in the equipment object of the present invention.

What is described in document CN109812730A is known where a disc-shaped printed circuit board is disclosed containing LED light sources arranged on the periphery of the disc; This light comes out through a hole so that it can be used to analyze liquid samples. This device, apart from being constituted by a different structure to that described in the present invention, is intended for the analysis of other types of liquids, not being usable for wastewater.

It is also known what is disclosed in document CN102519897A where a method for measuring the chemical oxygen demand of a water sample that makes use of a rotating disk containing multiple sources of LED light emission driven by a stepper motor. The COD calculation is carried out by measuring the absorption of light of a certain wavelength, and uses a neural network model. The present invention describes a differentiated equipment with respect to that of this antecedent, equipment that bases its operation on a procedure that is in turn differentiated from that of this antecedent.

It is also known what is disclosed in the document "Performing Calibration of Transmittance by Single RGB-LED within the Visible Spectrum" (Carreres Prieto D, Cerdán Cartagena F, García JT, Suardiaz Muro J) where a method for estimating the pollutant load of a wastewater sample using regression models and machine learning algorithms from the response data obtained by subjecting the sample to various LED light sources. You can use a spectrophotometry device with particularities such as widening the housing and / or having push buttons; however, this device differs from the structure and operation of the equipment object of the present invention.

For all these reasons, the present invention, compared to traditional systems and / or other devices or equipment known in the state of the art, presents equipment with a differentiated structure and configuration that improves and simplifies the process of characterization of the pollutant load present in wastewater

Description of the invention

The equipment object of the present invention consists of a device capable of characterizing the pollutant load present in wastewater in a simple, economical and rapid way, without the need to subject the water samples to pretreatment or chemical substances. This equipment is capable of estimating various polluting parameters in a matter of minutes, unlike traditional characterization systems and differently from other devices or equipment known in the state of the art.

The invention bases its analysis on indirect measurements of the samples introduced into the equipment using standard spectrophotometry cuvettes, which are correlated by means of computer models in order to estimate the various parameters. pollutants.

These samples are introduced in the upper part, by means of a tilting lid that guarantees that the external light does not affect the measurement process.

The samples to be analyzed are subjected to multiple wavelengths by means of a wavelength selector device, consisting of a rotating disk that comprises a plurality of Light Emitting Diodes (LEDs) arranged concentrically, which are aligned automatically with the sample under analysis and a broad spectrum photosensor, by means of a motorized system that allows its vertical and rotational movement.

Each LED emits a wide range of wavelengths simultaneously. The equipment, without making use of optical elements such as filters or diffraction grating, is capable of decomposing and selecting an isolated wavelength using correlation models. This reduces the dimensions, costs and maintenance of the equipment.

Because LEDs emit only wavelengths within a limited portion of the spectrum, multiple LEDs are used to allow analysis to be performed within a greater range of wavelengths.

The wavelength selection system, consisting of a rotating disk of interchangeable light-emitting diodes, is housed in a circular compartment in the center of which is a stepper motor to which the disk is connected by means of a perforated circular coupling that It prevents the scattering of the light beam emitted by the LEDs. Inside this circular compartment, there is a lever limit switch that serves to precisely position the disc when changing the work LED. This limit switch is driven by a small wheel that rotates freely, which is located at a certain point on the inner surface of the perforated circular coupling. Before starting the analysis, the equipment automatically aligns the first LED with the sample, for this, the disk begins to rotate until it activates the limit switch, so that it can estimate the angle of rotation necessary to align the first accurately the first LED with sample and sensor.

By means of two vertical spindles integrally connected to two stepper motors at the base of the equipment, the wavelength selection system is capable of move vertically to allow alignment of the concentric LEDs.

During the analysis, the equipment aligns each of the light-emitting diodes with the sample under analysis by combining both movements.

All information on the progress of the analysis of the equipment is displayed on a small screen located in the housing of the equipment.

Depending on the physicochemical characteristics of the fluid under analysis, the amount of light emitted by the diodes that manages to pass through the sample at a certain wavelength will vary, due to the fact that the organic and inorganic substances present in it react to certain parts of the spectrum, absorbing more or less light. This variation is registered by a sensor that is aligned with the sample and the light source.

From the spectral variations of the sample, the equipment estimates the pollutant load from mathematical models, showing the results directly on the PC, to which it is connected by means of a USB cable, which also supplies the power to the equipment, although this can also be powered by an external power supply.

Taking these aspects into account, the equipment object of the present invention can be said, equipment for the characterization by spectrophotometry of the pollutant load and other physical or chemical parameters present in wastewater comprises:

- a rotating wavelength selector disk comprising in turn: a plurality of light emitting diodes (LEDs) arranged radially and concentrically; an interchangeable circular printed circuit board; a rotating circular support; radial and concentric through holes; and a motor;

-a self-positioning system of the rotating disc which in turn comprises a lever limit switch actuated by a small wheel;

-a system for the vertical displacement of the rotary selector disk which in turn comprises: T-shaped guides; two spindles; and two engines;

-a tower where the sample specimen is introduced, through a cavity in the upper part; comprising a circular channel to channel the light generated towards the sample to be analyzed; a photodiode aligned with the circular channel;

-a hinged cover comprising a slot in the front and a rectangular guide in the lower part that fits with a slot of identical geometry arranged in the upper part of the tower; Y

-a system for the expulsion of the sample probe, which in turn comprises: a push-button; a stem; and a rocker lever.

With all this, the equipment of the present invention has a structure and configuration that is different from any other device known in the state of the art, with which the process of characterizing the pollutant load present in wastewater is improved and simplified. In addition, the equipment is designed to be used as a small desktop computer, connected to a personal computer by means of a USB cable for its power, control and / or calibration using a computer program or software developed for its handling, and where it is not external power is required on a mandatory basis.

It should be noted that, throughout the description and the claims, the term "comprises" and its variants are not intended to exclude other technical characteristics or additional elements.

Brief description of the figures

In order to complete the description and to aid in a better understanding of the characteristics of the invention, a set of figures and drawings is presented in which the following is represented by way of illustration and not limitation:

Figure 1.- Shows a perspective view of the front part of the equipment of the invention.

Figure 2.- Shows a perspective view of the rear part of the equipment of the invention.

Figure 3.- Shows a disassembled view of the equipment object of the present invention and where its main components can be seen.

Figure 4.- Shows a front view of the rotating wavelength selector disk, which comprises a self-positioning system; and where the rotating disk is attached to the system for vertical displacement.

Figure 5.- Shows, according to the previous figure, an exploded view of the assembly of the rotating disk.

Figure 6.- Shows a perspective view of the perforated support on which the disk with integrated light diodes is mounted.

Figure 7.- Shows, according to the previous figure, an exploded view of said assembly.

Figure 8.- Shows a view of the auto-positioning system on the selector disk, where both the limit switches, the motor that drives the assembly, and the wheel of the limit switch are shown.

Figure 9.- Shows a perspective view of the system for the vertical displacement of the selector dial of the equipment object of the invention.

Figure 10.- Shows, in accordance with the previous figure, an elevation view of said system for the vertical displacement of the selector dial.

Figure 11.- Shows a detailed view of the parts that make up the system for the vertical displacement of the selector dial.

Figure 12.- Shows an internal section of the core of the tower, where you can see the geometry of the interior cavity where the specimen under analysis is housed, the channel through which the light passes, as well as the arrangement of the sensor and the system ejection of the specimen tube.

Figure 13.- Shows an internal section where the ejection system of the specimen is seen.

Figure 14.- Shows a detailed view of the cover of the equipment through which the test tubes are inserted and extracted.

Detailed description of an embodiment of the invention

As can be seen in the figures, the equipment object of the present invention is designed to be able to be operated as a small desktop equipment, connected to a personal computer or an external electronic device. using a USB cable for power, control and / or calibration using a computer program or software developed for handling, and where no external power supply is required, and where for this, the equipment includes a programmable control module (22) that manages all the mechanical and electronic elements of the equipment.

The equipment, therefore, comprises a protective casing (1) made of a plastic material, although the material is not limiting, and it may be a wooden casing, galvanized sheet metal or other material, which may comprise side panels (10), panels that are preferably with a degree of protection IP66 or higher, and can be made of polycarbonate and can be transparent or translucent; and a hinged upper cover (11) for the introduction of the test tubes (P) with the water under analysis. In its lower part it is constituted by a base (2), where the protective casing (1) is supported, which has a screen (20), for example of the OLED type, in its front part where information is displayed during the process of analysis; and in its rear part it comprises at least one USB port (21) and may comprise electrical power supply means or power connectors (23)

The equipment bases its operation on a rotating disk (3) that comprises a plurality of light-emitting diodes, preferably LED type, of different spectral widths, which allow the wavelength that passes through the water samples to be varied, without the need to use any optical element such as diffraction gratings, mirrors, collimators or monochromators. The rotating disk (3) allows a determined diode to be aligned with the samples under analysis in a test tube and a photosensor through a combined rotational movement that the rotating disk itself has and a vertical displacement mechanism (4) of the disk itself through the action of some motors. Depending on the physicochemical properties of water, the amount of light that can pass through the samples for each wavelength varies, which is detected by the sensor, performing an analysis between 200nm and 3000nm. Therefore, the characterization of the samples is achieved by making use of the visible spectrum and the near ultraviolet and the near infrared, and where the data is managed in a programmable control module (22) included within the housing of the equipment, and that is in connection with an external computer. In this way, the equipment allows the characterization of the pollutant load of wastewater in real time, without the need for chemical reagents, through spectrophotometric analysis based on light-emitting diodes, by means of a rotating wavelength selector disk. and without the use of optical elements.

In this sense, the equipment can perform the analysis of Chemical Oxygen Demand (COD), Biological Oxygen Demand after 5 days (BOD5), Total Suspended Solids (SST), Phosphorus, Total Nitrogen (NT) and NH- O3 without the need to use chemical substances, or subject the samples under analysis to alterations or pretreatments.

A first aspect of the invention is that the equipment comprises a rotating wavelength selector disk (3), which is constituted by a circular casing (33) or compartment that internally comprises a disk (31) with a plurality of diodes (31A ) and with a circular printed circuit board, a circular support (32) perforated or with a plurality of through holes (32A); and a circular closing coupling (34) that closes the assembly, and a central motor (35) on the axis of rotation. The diodes (31A) are inserted through the holes of the perforated support or, in other words, the disk with a plurality of diodes (31) is mounted on the perforated support, so that the motor (35) allows the rotation of said disc assembly (31) engaged in perforated support (32).

As previously indicated, the equipment comprises a rotating disk (3) wavelength selector, composed of a variable number of light emitting diodes, arranged radially and concentrically and, therefore, the use of lamps is not required. incandescent or optical elements to diffract or direct the light beam. The light source, therefore, is integrated into the equipment, not being necessary to use any external source.

The rotating wavelength selector disk (3) comprises or is composed of a disk (31) with an interchangeable circular printed circuit board, containing a variable number of light-emitting diodes arranged radially and concentrically, and a support perforated rotary circular (32) on which the interchangeable light-emitting diode disk is located. The circular support (32), which rotates with the disk (31), comprises a plurality of through holes arranged radially and concentrically, which fully houses each of the light-emitting diodes, isolating them from the rest, and projecting its beam in a unidirectional way.

Between the circular casing (33) and the rear part of the circular support (32), there is a self-positioning system for the rotating disk itself, which is made up of at least one wheel (36), of small dimensions or of dimensions smaller than the circular support itself, which rotates freely located parallel to the support and distanced from the axis of rotation. The rotating wavelength selector disk, self-positions by rotating on its own axis due to the movement generated by the motor (35), until the wheel (36) actuates a lever limit switch (37) spaced from the center of a circular housing (33) of the claimed wavelength selector rotating disk.

The circular casing (33) containing the disk with diodes moves by means of a vertical displacement mechanism (4). In a possible embodiment of the invention, the circular casing (33), on its rear face, comprises anchors (38) with which they are fixed to the vertical displacement mechanism (4). For this, the mechanism is such that on both sides of the tower (5) of the equipment, there is a T-shaped guide (41) and a spindle (42), so that the spindle is connected in its upper external to a vertical guide support (43) that moves along the guide, where two spindles (42) at its lower end are connected to drive motors (44) located at the base (2) of the main body, having a coupling (45) of motor-spindle, and where in the lower part there is a limit switch (46) fixed to the base (2) and where in an intermediate point of the spindle there is a connector (48), one in each spindle, where the anchors (38) of the circular casing (33) are connected, and where said connector comprises an adjustable stop (47) of the limit switch that contacts the limit switch (46) fixed to the base (2) . This allows the length selector rotary disk (3) to move vertically.

In this way, in order to be able to adjust the alignment of the light-emitting diodes (31A) of the rotating disc (3) length selector with the specimen sample, apart from the circular movement of the rotating disc itself (3) generated By the motor (35), the rotating disk (3) can move vertically.

As previously stated, the internal body of the equipment comprises a tower (5), which on its sides comprises the vertical displacement mechanism (4), and which widens at its base. The equipment has two rectangular housings, an upper one (2A) and a lower one (2B), joined by screws located on two of their faces and allowing access to the interior of it. The control electronics are located in the lower base (2B) by means of screws, leaving both the USB port (21) and the power connector (23) accessible.

The tower (5) has a vertical cavity (51), with a rectangular section, located in its upper part, whose depth is greater than the length of a standard spectrophotometric test tube (P) that contains the sample under analysis, with the in order to guarantee that the only light that falls on the sample is from the previously defined rotating disk (3). For this, the tower comprises a circular channel (52) perpendicular to the cavity (51), where at one of its ends there is an opening coinciding with a through hole of the circular support (32) that houses a diode (31A) and where its opposite end coincides with the specimen. The tower (5) also comprises a photosensor (53), aligned with the circular channel (52). Therefore, the main body of the tower (5) has a circular channel that channels the light generated by the rotating disk (3) towards the water sample in the test tube, and said light, once it passes through the test tube, is captured by the photosensor (53). The photosensor (53) consists of a single multispectral beam photodiode, which is aligned with the hole and the groove for the probe, which is located at a short distance from the probe containing the sample under analysis, and where the use of CCD matrices is not necessary. As mentioned above, the characterization of the samples is achieved by making use of the visible spectrum, and where the data obtained by the photosensor (53) when the light beam passes through the test tube are managed in the programmable control module (22) , being able to be displayed on the screen (20) or being able to be managed from an external computer since the equipment comprises at least one USB connection port (21).

Another important aspect of the invention is to define the way in which the test piece is protected from external light, and so that the photosensor (53) only captures the light emitted by the rotating disk (3). For this, the protective casing (1) has a hinged lid (11) in its upper part which is flush with the upper surface of the casing. For this, the cover includes a slot (12) in its front part to facilitate its opening and closing. For its part, the lower part of the cover comprises a rectangular guide (13) that fits into a groove (54) with identical geometry located in the upper part of the main body tower (5), and another slot (55) to facilitate the closure of the lid and prevent the sample under study from being affected by any external light source.

Finally, the last aspect of the invention lies in seeing how a test piece (P) can be inserted or extracted in the tower (5) of the equipment. To do this, as seen previously, the test piece (P) is introduced into the vertical cavity (51). To extract it, the equipment comprises a specimen extraction mechanism (6) comprising a push-button (61) located in the protective casing (1), preferably under the hinged cover (11), which vertically moves a stem (62) that It is connected to a rocker lever (63), the end of which is located in the lower part of the cavity (51) where the specimen containing the sample under study is housed, so that when actuating Manually push the button (61), the mechanism pivots and pushes the specimen outwards.

In a possible embodiment of the invention, the protective casing (1) has four transparent rectangular side panels (10) located by internal side guides.

In a possible embodiment of the invention, the lower base (2) has a rectangular geometry where in its front part it has an angled or inclined projection with respect to the base, on which the information screen (20) is housed.

As previously advanced, another particularity of the invention is that in a possible embodiment of the invention, the equipment can be powered electrically through the USB port (21) of the computer that controls it, not being necessary batteries or being connected to the network. electrical to function, which allows the equipment to be versatile, easily transportable or storable, and that it can be used as a desktop computer.

Therefore, the equipment for the characterization of the pollutant load in wastewater from the spectrophotometric analysis object of the present invention allows to analyze the samples in a simple, economical way and without the need to subject the samples to pretreatments or chemical substances. As previously mentioned, the equipment bases its operation on recording the amount of light that manages to pass through the sample at different wavelengths that are selected by means of a mechanism that aligns a disk with multiple light-emitting diodes with the sample under study by means of the combination of a rotary movement and vertical displacement. These movements are achieved by means of a motor connected to the axis of rotation of the wavelength selector disk, which is self-positioned by means of a limit switch; and where the vertical displacement is achieved with a pair of spindles connected to two motors anchored to the base of the equipment, which allows the wavelength selector disk to have a vertical displacement.

Claims (11)

1 Equipment for characterizing the pollutant load present in wastewater, which consists of a protective casing (1) that rests on a base (2) and which internally comprises a tower (5), where the protective casing (1) It comprises a hinged cover (11) for access to the upper part of the tower (5) where there is a vertical cavity (51) for the introduction of a test tube (P) with a sample of residual water; where the team is also characterized by comprising: a rotating wavelength selector disk (3), which is constituted by a circular casing (33) internally comprising a disk (31) with a plurality of diodes (31 A) and with a circular printed circuit board; a circular support (32) perforated with a plurality of through holes (32A) where the disk (31) is mounted on the circular support (32) and the diodes (31A) are inserted into the through holes (32A); It comprises a motor (35) that rotates the axis of the perforated support (32); and a circular closure coupling (34) that closes the rotating disk assembly (3); where the rotating disk comprises a self-positioning system located between the circular casing (33) and the back of the circular support (32), which is made up of at least one wheel (36) that rotates freely located parallel to the circular support ( 32) and spaced from the axis of rotation, and at least one lever limit switch (37); where the wheel (36) drives the limit switch (37) due to the movement generated by the motor (35); a vertical displacement mechanism (4), which is made up of a T-shaped guide (41) and a spindle (42), located on the sides of the tower (5), where the spindle is connected in its upper external to a vertical guide support (43) that moves along the T-shaped guide (41), where two spindles (42) at its lower end are connected to drive motors (44) located at the base (2) with a motor-spindle coupling (45), and where at an intermediate point of each spindle there is a connector (48) with vertical displacement, where the circular casing (33) of the length selector rotary disk (3) is connected; Y where the tower (5) comprises, in addition to the vertical cavity (51), a circular channel (52) and perpendicular to the cavity (51), where at one of its ends there is an opening coinciding with a through hole (32A ) of the circular support (32) that houses a diode (31A) and where its opposite end coincides with the test piece; and where the tower (5) also comprises a photosensor (53), aligned with the circular channel (52); where the photosensor (53) is in connection with a programmable control module (22) where the data collected by the photosensor is managed when the light passes through the test tube (P) and the sample is characterized. 2. - Equipment for the characterization of the pollutant load present in wastewater, according to claim 1, where the tower (5) comprises an extraction mechanism (6) from a test tube that comprises a push-button (61), which vertically moves a rod (62) that is connected to a rocker lever (63), the end of which is located in the lower part of the cavity (51) where the specimen (P) is housed. 3. - Equipment for characterizing the pollutant load present in wastewater, according to claim 1, where the diodes (31A) are arranged radially and concentrically; and the through holes (32A) are arranged radially and concentrically. 4. - Equipment for the characterization of the pollutant load present in wastewater, according to claim 1, where the circular casing (33) comprises in its rear part some anchors (38) where the connectors (48) of the displacement mechanism are fixed vertical (4) 5. - Equipment for the characterization of the pollutant load present in wastewater, according to claim 1, where the connector (48) comprises an adjustable stop (47) of the limit switch that contacts a limit switch (46) fixed in the base (2). 6. - Equipment for the characterization of the pollutant load present in wastewater, according to claim 1, where the connector (48) comprises an adjustable stop (47) of the limit switch that contacts a limit switch (46) fixed in the base (2). 7. - Equipment for the characterization of the pollutant load present in wastewater, according to claim 1, where the hinged lid (11) comprises a slot (12) in its front part and a rectangular guide (13) in its lower part, where the rectangular guide fits into a slot (54) with identical geometry located in the upper part of the tower (5) and on the perimeter of the cavity (51), and where it is arranged in the front part of the tower (5) of a cover opening slot (55) coinciding with the closed position of the cover slot (12). 8. - Equipment for characterizing the pollutant load present in wastewater, according to claim 1, where the protective casing (1) comprises side panels (10). 9. Equipment for characterizing the pollutant load present in wastewater, according to claim 1, where the base (2) comprises a screen (20), which screen is in connection with the programmable control module (22). 10.- Equipment for the characterization of the pollutant load present in wastewater, according to claim 1, where the base (2) comprises at least one USB port (21) for connection between the programmable control module (22) and a device external electronic. 11.- Equipment for the characterization of the pollutant load present in wastewater, according to claim 1, where the base (2) is made up of two rectangular casings, an upper one (2A) and a lower one (2B), joined by placed screws on two of its faces.