BIOGAS GENERATION KIT

Description

1 / 17 BIOGAS GENERATION KIT Field of Invention

[001] More particularly, the present invention relates to a complete modular system, in the simplified form of a kit to be assembled by the consumer himself, forming a small station for decentralized generation, regulation, storage and use of biogas obtained from the anaerobic digestion of organic biomass, particularly intended for small rural properties and family farming as a substitute for liquefied petroleum gas (LPG) and other conventional fuels. State of the art

[002] In the state of the art, biodigesters intended for the production of biogas from organic waste are known, including fixed chamber models in masonry, metal bell systems, flexible bag biodigesters and partially integrated solutions for rural use, as taught in the documents: EP2428558, CH277324, DE19732198, DE102008038262, DE102008038262, CN201241138, DE3530332, DE102009041569, DE102014003648 and EP2636444. These systems, however, present relevant technical limitations when analyzed from the aspects of functional integration, operational simplicity, pressure control and safety, as well as final cost, simplicity of sale and distribution of the disassembled set and ease of final assembly by the consumer himself.

[003] In traditional fixed-chamber or rigid bell-shaped biodigesters, biogas storage occurs in structural volumes independent of the fermentation chamber, requiring rigid structures, higher construction costs and, frequently, additional mechanical regulators for pressure control. In contrast, the present invention uses a single flexible membrane, which simultaneously performs the functions of containing the fermentation, accumulating biogas and generating the internal pressure necessary for the system's operation, eliminating rigid tanks and pressurized devices. Petition 870260032610, dated 08 / 04 / 2026, page 7 / 23 2 / 17

[004] In several known flexible biodigester solutions, biomass mixing occurs passively, which favors the formation of surface crusts, stagnant zones, and instability in biogas production. The invention is distinguished by integrating a manual agitation mechanism, inserted in a sealed manner inside the biodigester, allowing the homogenization of biomass, the breaking of crusts, and the improvement of biogas release, without resorting to motors or external energy.

[005] In the state of the art, systems in which biogas control is done in a fragmented way are also common, with filters, valves, meters and safety devices installed in a dispersed manner or non-existent, increasing operational risks and hindering monitoring by the user. In contrast, the present invention incorporates an integrated control panel, which brings together activated carbon filtration, control valves, liquid column pressure gauge and pressure relief valve, providing gas conditioning, direct visual monitoring and overpressure protection in a single compact and functional unit.

[006] Another recurring limitation in the state of the art relates to the instability of biogas pressure, which often depends only on the variable output of fermentation or on active mechanical regulators. The invention overcomes this limitation by employing passive means of pressure stabilization, consisting of the external application of distributed load over the upper compartment of the flexible membrane, allowing a more constant flow of biogas without the use of mechanical regulators or compressors.

[007] Furthermore, many known systems do not provide an adequate solution for excess biogas production, resulting in combustion, release into the environment, or interruption of the fermentation process. The present invention differs by providing a low-cost auxiliary flexible reservoir for temporary storage of excess biogas, decoupling generation from consumption and increasing the overall energy efficiency of the system.

[008] Finally, while the state of the art often presents Petition 870260032610, dated 08 / 04 / 2026, page 8 / 23 3 / 17 Partial solutions or solutions dependent on on-site adaptations, the present invention is characterized by a complete, low-cost, standardized and modular kit, including excavation molds, soil protection elements, anchoring components and all the means necessary for installation and operation, enabling simplified assembly, repeatability and reliable application in rural environments with limited infrastructure. Objectives of the Invention

[009] Given the state of the art, the present invention was developed to achieve different objectives and advantages, as well as to serve, in an ecological and economical way, small remote properties, including rural properties and those with family farming.

[010] The present invention aims to provide an integrated and modular system, configured as a complete kit, intended for the generation, regulation, temporary storage and direct use of biogas, obtained from the anaerobic digestion of organic biomass under low pressure conditions, especially applicable to small rural properties and domestic uses.

[011] The invention aims, specifically, to provide a system that operates without the use of electrical energy, pumps, compressors or active mechanical devices, in which the movement of the substrate, the storage of biogas and the supply of gas to the point of consumption occur exclusively by hydraulic displacement and by the internal pressure generated by fermentation and the controlled deformation of a flexible membrane.

[012] It is also an objective of the invention to integrate, in a single cooperative functional configuration, a biodigester consisting of a hermetically sealed flexible membrane, functionally defined in a lower fermentation compartment and an upper biogas accumulation compartment, associated with a manual biomass agitation mechanism, a gas control panel containing filtering, monitoring and safety elements, and external means of applying load. Petition 870260032610, dated 08 / 04 / 2026, page 9 / 23 4 / 17 pressure stabilizer, a flexible reservoir for storing excess biogas, and a consumption device compatible with low-pressure operation.

[013] Additionally, the invention aims to enable simplified and standardized installation, with components sized and configured for transport, assembly and operation at the place of use, without the need for complex infrastructure or specialized labor, characterizing a low-cost set ideal for consumers with limited income. Technical Advantages of the Invention

[014] A first technical advantage is that the system allows the continuous production of biogas under low pressure, with direct use at the point of consumption, eliminating the need for compression, rigid storage or artificial pressurization of the gas.

[015] Another relevant technical advantage stems from the use of a unique flexible membrane, which simultaneously performs the functions of containing anaerobic fermentation, temporary accumulation of biogas and generation of the internal pressure necessary for the system to function, significantly reducing the number of structural and mechanical components.

[016] The incorporation of a manual agitation mechanism, inserted in a sealed manner in the fermentation compartment, provides an operational advantage by reducing crust formation, promoting biomass homogenization and facilitating biogas release, contributing to greater stability of the fermentation process.

[017] The integrated control panel provides an additional technical advantage by allowing, in a simple and visual way, the filtering of biogas, the control of flow, the monitoring of internal pressure and the protection against overpressure, increasing the safety of the system without introducing technological complexity.

[018] The use of passive pressure stabilization means, by Petition 870260032610, dated 08 / 04 / 2026, page 10 / 23 5 / 17 External application of distributed load over the upper compartment of the membrane constitutes a technical advantage by standardizing the biogas supply, reducing operational fluctuations and completely eliminating the need for active mechanical regulators.

[019] The presence of a flexible reservoir for storing excess biogas allows for the absorption of variations between production and consumption, preventing gas losses and increasing the flexibility of use of the system.

[020] Finally, the assembly presents a consistent technical advantage due to its constructive simplicity, modularity, relatively low cost, ease of installation and maintenance, associated with an operation based on consolidated physical principles traditionally employed in small-scale anaerobic digestion systems. Description of the drawings

[021] For a better understanding of the present invention, a detailed description thereof is given below, with reference to the accompanying drawings: FIGURE 01 represents an exploded perspective view schematically showing all the components of this kit; FIGURE 02 shows a perspective view of the pit where the biodigestion chamber will be installed; FIGURE 03 illustrates a perspective view of the template for excavating the pit shown in the previous figure; FIGURE 04 is an exploded perspective view of the adjustable geomembrane mold / protector on the inner faces of the pit shown in figure 2; FIGURE 05 shows a perspective view of the mold / protector from figure 4 mounted inside the pit illustrated in figure 2; FIGURE 06 represents an exploded perspective view of the flexible biodigestion chamber (4), whose shape fits inside the said pit;. Petition 870260032610, dated 08 / 04 / 2026, page 11 / 23 6 / 17 FIGURE 07 is a perspective view and other enlarged details also in perspective showing the constructiveness of the flexible biodigestion chamber; FIGURE 08 shows a perspective view of the independent reservoir in the form of a volume-regulating balloon for the biogas produced; FIGURE 09 represents a front view of the control panel for pressure, safety and regulation of biogas produced by the kit; FIGURE 10 shows a rear view of the aforementioned control panel for pressure, safety, and regulation of biogas produced by the kit; and the FIGURE 11 represents a perspective view showing the details of the external pressure applicator assembly in the form of a ballast bag (13) to be placed on the flexible biodigestion chamber. Detailed description of the invention

[022] According to these illustrations and their details, the present BIOGAS GENERATION KIT is of the type sold fully disassembled. Its disassembled parts constitute a reduced volume and are easy to transport. Assembly of the set at the final destination or place of use is carried out by the user himself in an easy and quick way, even in remote locations. Assembly does not require special tools or specific skills.

[023] The present BIOGAS GENERATION KIT, as illustrated in figures 1 and 2, comprises: - laminar template (1) marking the excavation area of ​​a pit (2) which, in turn, has a rectangular truncated pyramidal shape, where the larger base is facing upwards and the smaller one is facing downwards; - Adjustable geomembrane mold / protector (3) on the inner faces of the pit (2); - flexible biodigestion chamber (4), whose shape fits inside the pit (2); - anchoring components (5) of the flexible chamber (4), including Petition 870260032610, dated 08 / 04 / 2026, page 12 / 23 7 / 17 their respective mooring cords (6) and wooden stakes (7); - at least one manual agitation mechanism (8) for the organic substrate contained inside the flexible chamber (4); - at least one independent reservoir (9) in the form of a volume regulating balloon for biogas produced;

[024] - at least one roll of flexible hose (10a), made of material compatible with biogas and suitable for operation under low pressure;

[025] - biogas pressure, safety and regulation control panel (11), installed downstream of the gas outlet of the flexible biodigestion chamber (4) and upstream of the biogas utilization point and / or auxiliary storage tank (9), said panel being configured to condition, regulate, monitor and protect the flow of biogas generated in the system;

[026] - at least one standard biogas consumption unit (12); and

[027] - an external pressure applicator set in the form of a ballast bag (13), preferably two units, each weighing approximately between 10 and 15 kilos and laid flat and accommodated over the flexible biodigestion chamber (4).

[028] Figure 3 shows in detail the laminar template (1) marking the excavation area of ​​the pit (2), where it can be seen that it is made of polymer tape extending to form a rectangle coinciding with the larger base of the pit (2), as well as the rectangle formed having its four inner corners integrated with delimited quadrangular areas (14), while on the outer side it distributes a convenient number of eyelets (15) and respective cords (16) for tying to wooden stakes (7). The template also includes several markings of different colors (17), indicating the front, back, right side and left side ends of the pit (2), as well as the positioning of some parts of the flexible chamber (4).

[029] The geomembrane mold / protector (3) is illustrated in figures 4 and 5, where it can be seen that it is formed by several laminar pieces, the first of which is the rectangular bottom (18), trapezoidal side walls (19 Petition 870260032610, dated 08 / 04 / 2026, page 13 / 23 8 / 17 20) and end walls (21-22), some with openings (23) for the passage of the corresponding parts of the flexible chamber (4).

[030] Figure 6 shows the flexible biodigestion chamber (4), whose shape fits inside the pit (2), where it can be seen that it is a biodigester configured as a flexible and sealed structure, intended to simultaneously perform the anaerobic digestion of organic biomass, the temporary accumulation of biogas and the generation of internal pressure necessary for the operation of the system.

[031] The flexible biodigestion chamber (4), entirely made of flexible and gas-impermeable membrane, is defined by two integrated compartments, a lower compartment (24), configured as an anaerobic fermentation chamber, and an upper compartment (25), configured as a chamber for the accumulation and temporary storage of biogas, both externally interconnected by a contour sheath (26) and respective openings (27), these and the first correspond to the fittings for the anchoring components (5) in the form of tubes with their respective tie cords (6), so that the lower compartment (24) can be below ground level and embedded inside the pit (2), while the upper compartment (25) is completely exposed above ground level, where it can inflate and deflate freely, and also includes at least one biogas outlet connection (28) with its respective hose (10b).The distinction between compartments (24) and (25) arises from the deformable behavior of the membrane defined by the upper compartment (24), which varies its volume as a function of substrate digestion and biogas generation, and not from the presence of rigid internal partitions.

[032] As illustrated in figure 7, the flexible chamber (4) also includes an inclined side tube (29) for access to the manual agitation mechanism (8) of the organic substrate contained inside the flexible chamber (4).

[033] The ends of the flexible chamber (4) include, respectively, a loading tube (30) through which the organic biomass is Petition 870260032610, dated 08 / 04 / 2026, page 14 / 23 9 / 17 introduced into the biodigester and a discharge tube (31) of organic substrate, through which the digested effluent (digestate) is displaced out of the system as new material is fed in.

[034] The tubes (30) (31) have Y connections (32), and all of them have their respective airtight caps (33), all removable when necessary. All tubes (28), (29) and (30) are fitted and sealed with the walls that form the flexible chamber (4) and with their respective caps.

[035] The embedded form of the lower compartment (24) below ground level provides thermal stability favorable to microbiological activity, provides structural support to the flexible membrane, and confers natural containment of the biomass volume.

[036] The manual agitation mechanism (8) is configured to promote the homogenization of the biomass contained in the lower compartment of the biodigester, contributing to the stability of the anaerobic digestion process and to the efficiency of biogas generation. It comprises a propeller or propeller (34a) mounted at the lower end of a handle (34b) to generate movement of the biomass contained inside the flexible chamber (4). Preferably, the agitation assembly (8) is configured in a dismountable manner, allowing its separate transport and subsequent assembly during system installation, preserving the modular and portable nature of the kit.

[037] As illustrated in figure 8, the independent reservoir (9) made of flexible and gas-impermeable material is ordinarily a regulating balloon for the volume of biogas produced, has at least one inlet / outlet connection (35) with the respective hose (10c) fluidly connected downstream of the control panel (11) and upstream of the biogas utilization equipment (12), acting as an intermediate buffering element between biogas production and consumption.

[038] Front figure 9 and rear figure 10 show the panel in detail. Petition 870260032610, dated 08 / 04 / 2026, page 15 / 23 10 / 17 control (11), where it can be seen that it comprises a mounting plate (11a) with printed safety information and, at its bottom, there is a valve (36) which is the biogas feed entry point, its inlet being connected by the hose (10b) to the flexible biodigestion chamber (4), while its tubular outlet (37) has a T-connection (38) forming two biogas paths (39) and (40), wherein the first has an overpressure relief valve (41), a water inlet (42) and a biogas pressure indicator (43) of the water column type, while the second path is intercepted by an activated carbon filter (44).

[039] The gas flow control valve (36) is configured to allow opening, closing and isolation of the gas line during operation, maintenance or storage.

[040] The activated carbon filter (44) is configured to reduce odors and remove corrosive compounds present in biogas, such as hydrogen sulfide (H2S).

[041] After the activated carbon filter (44) its piping (45) and respective connections divides the biogas flow into two paths (46) and (47), both with valves (48), as well as the first path is connected by hose (10d) to the independent reservoir (9) in the form of a volume regulator balloon for biogas produced, while the second path is connected by means of hose (10e) to the usual biogas consumption unit (12).

[042] The usual unit (12) of biogas consumption is preferably a traditional stove, portable or fixed, compatible with low-pressure biogas, having at least one burner and suitable ignition means to start the combustion of the biogas. The stove may be of the type used in indoor or outdoor environments, according to the installation and ventilation conditions of the location.

[043] Figure 11 shows the external pressure applicator assembly in the form of a ballast bag (13) and, as already mentioned, preferably comprises two units, each weighing approximately between 10 and 15 kilograms and Petition 870260032610, dated 08 / 04 / 2026, page 16 / 23 11 / 17 extended in a flattened and accommodating manner over the flexible biodigestion chamber (4).

[044] Each ballast bag (13) comprises multiple pockets (49), all closed at the top by a hem (50) and respective closing cord (51).

[045] In a preferred configuration, each pocket (49) is filled with multiple individual units of granular material, such as sandbags (52), each unit having a predetermined mass, so that the total mass applied per pocket is controllable.

[046] As can be seen from what has been shown and illustrated, the present BIOGAS GENERATION KIT includes all the means necessary for its assembly and installation by the user himself, since the templates (1) and (4) provide means for making and lining the inside of the installation pit (2), inside which the flexible biodigestion chamber (4) and all its external anchoring components (6-7) are mounted, as well as the panel (11), independent reservoir (9) and biogas consumption unit (12).

[047] At the end of the assembly by the user, an integrated anaerobic biodigestion system is created, configured to operate as an autonomous unit for the generation, storage, regulation and use of biogas, especially adapted for decentralized applications in rural or isolated environments.

[048] The kit is designed for continuous operation without the need for external power, mechanical pumps or active control systems, operating on the basis of principles of hydraulic displacement, internal pressure build-up and passive gas flow regulation.

[049] All components are spatially and functionally organized so that, once installed on the prepared ground, they operate as a single cooperative unit, in which: a. the organic substrate enters the flexible biodigestion chamber (4) through its inlet tube (30) and is subsequently closed by its lid (33); Petition 870260032610, dated 08 / 04 / 2026, page 17 / 23 12 / 17 b. anaerobic fermentation occurs inside the sealed flexible chamber (4); the biogas produced accumulates in the upper compartment (25) of the flexible chamber (4); c. internal pressure moves the processed digestate towards an overflow outlet (31); d. biogas is captured by means of a gas outlet connection (28) and corresponding hose (10b); e. the gas passes through a control panel (11) which contains various means of controlling the biogas supplied; f. the excess gas can be directed to a regulating reservoir (9) through its hose (10d); and g. the regulated gas is conveyed through hoses (10e) to a two-burner stove (12) for immediate use.

[050] The operation of the BIOGAS GENERATION KIT in question results from the continuous interaction between the lower (24) and upper (25) compartments, where as the biomass ferments in the lower compartment (24), the biogas generated accumulates in the upper compartment (25), promoting the expansion of the membrane and increasing the internal pressure. This pressure acts simultaneously to displace the digestate through the overflow tube; and to force the flow of biogas through the outlet connection (28) towards the regulation system defined by the control panel (11). In this way, the aforementioned compartments operate as a self-regulating hydraulic and pneumatic displacement mechanism, eliminating the need for pumps, compressors or external pressurization devices. The flexible membrane defined by the upper compartment (25) thus simultaneously performs the functions of containing the fermentation, storing biogas; and generating pressure for the operation of the system.

[051] During the operation of the biodigester, the agitation assembly (8) is manually activated by the user through alternating movements and / or Petition 870260032610, dated 08 / 04 / 2026, page 18 / 23 13 / 17 rotational movements of the handle (34b). These movements are transmitted to the propelling element (34a), which promotes the internal circulation of biomass in the lower compartment (24) of the biodigester. The configuration of the assembly allows movement in multiple directions, ensuring the mixing of biomass throughout the effective volume of the fermentation chamber. This results in a more uniform distribution of solids and liquids, as well as greater contact between anaerobic microorganisms and organic material.

[052] The use of the agitation assembly (8) provides, among others, the following technical effects: homogenization of the biomass, reducing the stratification of the substrate and favoring the stability of the fermentation process; reduction or elimination of the formation of surface crusts composed of fibrous and solid fractions, which could hinder the release of biogas from the liquid phase to the upper compartment; facilitation of the continuous release of biogas, contributing to the maintenance of stable internal pressure in the biodigester; and improvement of the overall efficiency of biogas generation, without the need for mechanical drives, electric motors or external energy sources.

[053] All biodigester operation is monitored by the control panel (11), where pressure and supply settings are controlled, including means for total safety. During system operation, the biogas produced in the biodigester is conducted through the outlet connection (28) and respective hose (10B) from the upper compartment (25) to the control panel (11). Initially, the biogas passes through the activated carbon filter (44), where odor reduction and removal of undesirable compounds occur, mainly corrosive compounds present in the biogas, such as hydrogen sulfide (H2S), improving gas quality and reducing the risk of corrosion in downstream components. After filtration, the biogas passes through the control valves (48), which allow regulating or interrupting the flow according to the operational condition, including: initial system start-up; normal operation and biogas consumption; directing the gas to the independent reservoir. Petition 870260032610, dated 08 / 04 / 2026, pp. 19 / 23 14 / 17 (9) auxiliary storage, maintenance procedures and safe shutdown. The biogas pressure is continuously monitored by means of the water column manometer (43), allowing the user to verify if the system operates within the expected pressure range and to identify variations resulting from gas production or consumption. The pressure relief valve (41) integrated into the control panel (11) is configured to operate automatically when the internal system pressure exceeds a previously defined safe value. The overpressure relief valve (41) is a component with a safety function to protect, among other components, the flexible biodigestion chamber (4), system connections and piping; the auxiliary storage tank (9); and the biogas utilization equipment (12).In this way, the control panel (11) acts as a protection interface between the biogas generation unit and the consumption unit, reducing operational risks and increasing system reliability.

[054] Therefore, the control panel (11) functionally cooperates with the biodigester compartments and with the biogas accumulation dynamics. As the biogas accumulates in the upper compartment (25) of the biodigester, the generated internal pressure propels the gas towards the control panel (11). The panel, in turn, conditions, regulates and directs the gas flow in a controlled manner to the utilization equipment (12) and / or to the auxiliary reservoir (9). Thus, the control panel (11) ensures that the biogas produced is made available in a stable, measurable and safe manner, constituting an essential element for the continuous and reliable operation of the BIOGAS GENERATION KIT.

[055] The operation of the present BIOGAS GENERATION KIT is also influenced by the ballast bags (13) and, for this purpose, these are positioned directly on the upper compartment (25) of the flexible biodigestion chamber (4), in order to: distribute the load applied to the surface of the upper compartment (25) uniformly; avoid localized concentrations of mechanical stress; and allow controlled expansion and contraction of said compartment. Petition 870260032610, dated 08 / 04 / 2026, page 20 / 23 15 / 17 upper compartment (25) during biogas accumulation and consumption. The ballast bags (13) can be positioned side by side or on the same side of the biodigester, according to the installation configuration, without compromising the intended technical effect, which is the external load applied to generate a substantially constant backpressure on the gas volume and contributes to: stabilizing the internal biogas pressure, promoting continuous and predictable gas flow towards the control panel (11); favoring the displacement of the digestate through the overflow pipe (31), and limiting the excessive expansion of the upper compartment (25) and, therefore, the use of removable and adjustable ballast bags (13) allows the applied pressure to be easily modified, redistributed or maintained, without the use of mechanical devices, compressors, rigid reservoirs or external energy sources.External pressure operates in direct functional cooperation with the upper compartment of the biodigester, as well as complementing the internal pressure generated by the accumulation of biogas, resulting in a stable and self-regulated operating regime. This functional cooperation reinforces the passive character of the system and contributes to its continuous, safe and efficient operation.

[056] The auxiliary storage tank (9) is a versatile component during the operation of the assembly, because, when the biogas production rate exceeds the consumption rate in the utilization equipment (12), the biogas regulated by the control panel (11) directs the surplus to the auxiliary tank (9), allowing the stored biogas to be subsequently released and used when consumption demand increases or is restored.The auxiliary reservoir (9) operates automatically without mechanical compression of the biogas, relying exclusively on the volumetric expansion of the flexible biodigestion chamber (4), in accordance with the low-pressure regime adopted by the system. As biogas production increases, the generated internal pressure propels the biogas towards the control panel (11). When there is no immediate consumption or when demand is reduced, the control panel (11). Petition 870260032610, dated 08 / 04 / 2026, pages 21 / 23 16 / 17 directs excess biogas to the auxiliary reservoir (9). Conversely, when consumption demand increases, previously stored biogas is released from the auxiliary reservoir and conducted to the utilization equipment under regulated pressure conditions.

[057] The inclusion of the auxiliary biogas reservoir provides, among others, the following technical effects: accommodation of excess biogas without the need for ventilation or disposal; reduction of abrupt pressure variations in the system; reduction of mechanical stresses on the biodigester membrane and on the piping; and greater operational flexibility regarding the timing of biogas consumption.

[058] The present BIOGAS GENERATION KIT, as described, offers integrated and technically sound solutions for the production, regulation, storage and use of biogas, especially suitable for domestic, rural and small-scale applications. The functional combination of the flexible membrane biodigester, the external pressure application unit, the control panel, the pipeline, the auxiliary tank and the utilization equipment results in a predominantly passive operating system, with low cost, low construction complexity and a high degree of operational safety.

[059] On the other hand, the present BIOGAS GENERATION KIT, in addition to realizing all the advantages mentioned above, also distinguishes itself from known solutions by eliminating the need for compressors, active pressurization systems, rigid high-pressure tanks or external energy sources, while still maintaining pressure stability and predictability in biogas supply.

[060] It should be understood that the present BIOGAS GENERATION KIT is not limited to the embodiments specifically described, and variations, modifications and functional equivalents are admissible, provided they do not depart from the scope defined by the claims. Components, materials, dimensions, arrangements and methods of operation may be adjusted accordingly. Petition 870260032610, dated 08 / 04 / 2026, pp. 22 / 23 17 / 17 specific needs of each application, without distorting the fundamental inventive concept of the whole. Petition 870260032610, dated 08 / 04 / 2026, p. 23 / 23

Claims

1 / 4 CLAIMS 1) BIOGAS GENERATION KIT, characterized by comprising: a laminar template (1) marking the excavation area of ​​a pit (2) which, in turn, has a rectangular truncated pyramidal shape, where the larger base faces upwards and the smaller base faces downwards; adjustable geomembrane mold / protector (3) on the inner faces of the pit (2); flexible biodigestion chamber (4), whose shape adjusts inside the pit (2); anchoring components (5) of the flexible chamber (4) at ground level, including their respective tie cords (6) and wooden stakes (7); at least one manual agitation mechanism (8) for the organic substrate contained inside the flexible chamber (4); at least one independent reservoir (9) in the form of a volume regulating balloon for biogas produced inside the flexible chamber (4); at least one roll of flexible hose (10a) made of biogas-compatible material and suitable for operation under low pressure;a control panel (11) installed downstream of the gas outlet of the flexible biodigestion chamber (4) and upstream of the biogas utilization point and / or auxiliary storage reservoir (9), said panel being configured to condition, regulate, monitor and protect the flow of biogas generated in the system; at least one usual biogas consumption unit (12); and an external pressure applicator assembly in the form of a ballast bag (13), preferably two units, each weighing approximately between 10 and 15 kilograms and laid flat and accommodated over the flexible biodigestion chamber (4). 2) BIOGAS GENERATION KIT, according to claim 1, characterized by the laminar template (1) marking the excavation area of ​​the pit (2) being made of polymer tape extending to form a rectangle Petition 870260011385, dated 05 / 02 / 2026, page 27 / 41 2 / 4 coinciding with the larger base of the pit (2), as well as the rectangle formed having its four inner corners integrated with delimited quadrangular areas (14), while on the outer side it distributes a convenient number of eyelets (15) and respective cords (16) for tying to wooden stakes (7); said template includes several markings of different colors (17), indicating the front, back, right side and left side ends of the pit (2), as well as the positioning of some parts of the flexible chamber (4). 3) BIOGAS GENERATION KIT, according to claim 1, characterized in that the geomembrane mold / protector (3) is formed by laminar pieces, being a rectangular bottom (18), trapezoidal side walls (19-20) and end walls (21-22), some with openings (23) for the passage of the corresponding parts of the flexible chamber (4). 4) BIOGAS GENERATION KIT, according to claim 1, characterized in that the flexible biodigestion chamber (4), entirely made of flexible and gas-impermeable membrane, is defined by two integrated compartments, a lower compartment (24), configured as an anaerobic fermentation chamber, and an upper compartment (25), configured as a chamber for the accumulation and temporary storage of biogas, both externally interconnected by a contour sheath (26) and respective openings (27), these and the first corresponding to the fittings of the anchoring components (5) in the form of tubes with their respective tie cords (6), so that said lower compartment (24) is positioned below ground level and embedded inside the pit (2), while the upper compartment (25) is exposed above ground level, where it includes at least one biogas outlet connection (28) with its respective hose (10b);said flexible chamber (4) also includes an inclined side tube (29) which constitutes access for the manual agitation mechanism (8) of the organic substrate contained inside the flexible chamber (4); and the ends of said flexible chamber (4) include, respectively, an organic biomass loading tube (30) and a discharge tube (31) Petition 870260011385, dated 05 / 02 / 2026, page 28 / 41 3 / 4 of digested effluent (digestate); said tubes (30) (31) have Y-connections (32), as well as all of them having their respective watertight caps (33), all removable, as well as all tubes (28), (29) and (30) are fitted and sealed with the walls that form the flexible chamber (4).; 5) BIOGAS GENERATION KIT, according to claim 1, characterized in that the manual stirring mechanism (8) is configured with a propeller or propeller (34a) mounted on the lower end of a handle with a grip (34b). 6) BIOGAS GENERATION KIT, according to claim 1, characterized in that the independent reservoir (9) of flexible and gas-impermeable material is ordinarily a regulating balloon for the volume of biogas produced, having at least one inlet / outlet connection (35) with the respective hose (10c) fluidically connected downstream of the control panel (11) and upstream of the biogas utilization equipment (12). 7) BIOGAS GENERATION KIT, according to claim 1, characterized in that the control panel (11), in the form of a mounting plate (11a) with all safety information printed on it, includes at the bottom a biogas feed inlet valve (36) and its respective hose (10b) connected to the flexible biodigestion chamber (4), while its tubular outlet (37) has a T-connection (38) forming two biogas channels (39) and (40), wherein the first has an overpressure relief valve (41), a water inlet (42) and a biogas pressure indicator (43) of the water column type, while the second channel is intercepted by an activated carbon filter (44), after which its tubing (45) and respective connections divide the biogas flow into two channels (46) and (47), both with valves (48), as well as the first channel being connected by the hose. (10d) to the independent reservoir (9) in the form of a volume regulating balloon for biogas produced,while the second line is connected via hose (10e) to the usual unit (12) for consumption of Petition 870260011385, dated 05 / 02 / 2026, page 29 / 41 4 / 4 biogas., 8) BIOGAS GENERATION KIT, according to claim 1, characterized in that the usual biogas consumption unit (12) is preferably a traditional stove, portable or fixed, of the type used in indoor or outdoor environments, compatible with low-pressure biogas, having at least one burner and ignition means suitable for initiating biogas combustion. 9) BIOGAS GENERATION KIT, according to claim 1, characterized in that the external pressure applicator assembly comprises at least one ballast bag (13), preferably two units, each weighing approximately between 10 and 15 kilograms and laid flat and accommodated over the flexible biodigestion chamber (4); each ballast bag (13) comprises multiple pockets (49), all closed at the top by a sheath (50) and respective closing cord (51); in a preferred configuration, each pocket (49) is filled with multiple individual units of granular material in the form of sandbags (52), each unit having a predetermined mass, so that the total mass applied per bag is controllable. Petition 870260011385, dated 05 / 02 / 2026, pp. 30 / 41

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