Microbial enhanced biogas production system

Abstract

The utility model is suitable for the field of biogas preparation, provides a kind of microbial intensification type biogas preparation system, including adjusting chamber, and inside contains organic matter and anaerobic bacteria seed;Multiple adjusting channels are distributed in adjusting chamber, and two ends are connected with communicating port respectively, and the communicating port is arranged in adjusting chamber side wall;Each adjusting channel is equipped with opening at its extension direction multiple predetermined point position, and the opening is used to connect adjusting channel internal space with adjusting chamber internal space;The opening is equipped with movable plugging member for plugging / conducting, when fluid temperature C1 in adjusting channel is higher than outside temperature C2, the opening enters conducting state, the utility model can: according to local temperature, monitor bacteria activity, to adaptively supply biological intensification bacterium agent;By adjusting channel structure cooperation inside fluid flow, realize heat conduction heat dissipation to high temperature area, ensure that bacteria have suitable temperature reaction environment.

Description

Technical Field

[0001] This utility model relates to the field of biogas preparation, and in particular to a microbial-enhanced biogas preparation system. Background Technology

[0002] Anaerobic biogas production, also known as anaerobic digestion, is a technology that uses microorganisms to decompose organic matter under anaerobic conditions to produce biogas (mainly composed of methane and carbon dioxide). This process not only produces renewable energy (biogas) but also processes organic waste, generating valuable organic fertilizers (biogas residue and biogas slurry).

[0003] To improve biogas production and efficiency, current optimization methods involve altering the fermentation environment through microbial enhancement and organic matter enhancement. Microbial enhancement typically employs methods such as adding bio-enhancing agents and biostimulation. However, current agent application methods involve uniform distribution, which fails to adapt to the activity levels of the microbial community within the fermentation environment, thus hindering efficient interaction between the microbial community and organic matter.

[0004] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] To address the aforementioned shortcomings, the purpose of this invention is to provide a microbial-enhanced biogas production system, which can: Based on local temperature, monitor bacterial activity to adaptively supply bio-enhancing agents; By adjusting the channel structure in conjunction with the flow of internal fluids, heat can be conducted and dissipated from high-temperature areas, ensuring that the bacteria have a suitable reaction environment at a suitable temperature.

[0006] To achieve the above objectives, this utility model provides a microbial-enhanced biogas production system, comprising: The regulating chamber contains organic matter and anaerobic bacteria. Multiple regulating channels are distributed within the regulating chamber, with each end connected to a connecting port located on the side wall of the regulating chamber. Each regulating channel has openings at multiple predetermined points along its extension direction, which connect the internal space of the regulating channel to the internal space of the regulating chamber. Movable sealing components are provided at the openings to block or open them. When the fluid temperature C1 inside the regulating channel is higher than the external temperature C2, the opening enters the open state.

[0007] According to the microbial enhanced biogas preparation system of this utility model, multiple regulating channels are constructed in groups at the same height, and multiple groups are distributed in the height direction of the regulating chamber.

[0008] According to the microbial enhanced biogas preparation system of this utility model, multiple regulating channels are interconnected through multiple sets of capillary tubes; each set of capillary tubes is a ring structure composed of arc-shaped sub-tubes; multiple sets of capillary tubes are distributed from the center of the regulating chamber towards the side wall.

[0009] According to the microbial enhanced biogas preparation system of this utility model, the pipe material of the regulating channel is a heat-conducting material.

[0010] According to the microbial enhanced biogas preparation system of this utility model, the heat-conducting material is made of copper or aluminum.

[0011] The microbial-enhanced biogas production system of this utility model further includes: multiple temperature measuring components, each disposed near the connection port; the internal space of the regulating chamber is divided into multiple areas according to the distribution points of the temperature measuring components; and the fluid flow direction in the regulating channel is from the high-temperature area to the low-temperature area according to the area temperature detected by the temperature measuring components.

[0012] According to the microbial enhanced biogas preparation system of this utility model, the movable sealing component includes: a baffle that moves against the outer wall of the adjustment channel; a thermosensitive metal driving plate, one end of which is connected to the baffle and the other end of which is connected to the outer wall of the adjustment channel; the thermosensitive metal driving plate has two sides that sense different temperatures, and when there is a temperature difference between the two sides, the thermosensitive metal driving plate bends to drive the baffle to move.

[0013] According to the microbial enhanced biogas production system of this utility model, the movable sealing component is a second control valve indirectly controlled by a temperature sensor, and the opening size of the second control valve is determined by the temperature detected by the temperature sensor; the temperature measured by the temperature sensor is the ambient temperature C2. Obtain the opening adjustment value b, where the opening adjustment value b = the actual measured temperature of the thermometer / the planned temperature; The planned temperature is the set normal fermentation temperature; The actual opening B1 = (1 / opening adjustment value b) - 1.

[0014] The biogas preparation method according to this utility model includes the following steps: Step 1: The organic raw material to be processed is crushed and separated by a crusher to obtain a solid part and a liquid part. The solid part is transported to the regulating chamber, and the liquid part is separated into a carbohydrate-rich part and a general wastewater part through a membrane concentration reactor, and then flow into the storage tank respectively. The carbohydrate-rich portion is transported to the enhanced microbial culture system to serve as a nutrient for the culture system; the ordinary wastewater portion enters the conditioning chamber and is mixed with the solid portion to adjust the substrate solid content to 10-12%. Step 2: The bio-fortifying agent cultivated in the intensified microbial agent cultivation system is added to the regulating chamber. The organic load of the anaerobic reaction is 3-5 kgVS / (m3·d), and the fermentation temperature is 50-55℃. The anaerobic fermentation reaction produces biogas, biogas slurry, and biogas residue. The biogas undergoes desulfurization and decarbonization treatment. After the effluent is separated by a solid-liquid separation device, 60-80% of the liquid portion is returned to the regulating chamber. The bio-fortifying agent is added once a day, and the amount added is 2%-4% of the volatile solids content of the feed substrate.

[0015] This utility model provides a microbial-enhanced biogas production system, comprising: a regulating chamber containing organic matter and anaerobic bacteria; multiple regulating channels distributed within the regulating chamber, each end of which is connected to a connecting port located on the side wall of the regulating chamber; each regulating channel having an opening at multiple predetermined points along its extension direction, the opening connecting the internal space of the regulating channel to the internal space of the regulating chamber; each opening being equipped with a movable sealing element for blocking / opening; when the fluid temperature C1 inside the regulating channel is higher than the external temperature C2, the opening enters the open state.

[0016] This utility model can: 1. Monitor the activity of the microbial strain based on the local temperature to adaptively supply the bio-enhancing agent; 2. By adjusting the channel structure in conjunction with the flow of internal fluid, heat conduction and dissipation are achieved in high-temperature areas, ensuring that the strain has a suitable reaction environment at a suitable temperature. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the fluid flow in the regulating channel according to the second embodiment of this utility model; Figure 3 This is a structural diagram of the movable sealing component in the third embodiment; In the diagram, 1-adjustment chamber, 2-adjustment channel, 3-opening, 4-temperature measuring component, 5-connection port, 6-capillary tube, 7-first control valve, 8-chamber, 9-baffle, 10-thermal metal drive plate. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0019] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0020] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] See Figure 1 This utility model provides a microbial-enhanced biogas production system, which includes: The regulating chamber 1 contains organic matter and anaerobic bacteria, and is generally an anaerobic fermentation reactor. The organic matter is diverse, such as straw, fruit tree waste, sewage, and wastewater. The anaerobic bacteria are of various types, including hydrolytic fermentation bacteria and methanogenic bacteria.

[0023] Multiple regulating channels 2 are distributed within the regulating chamber 1. Each regulating channel is a pipe-like structure, with both ends connected to a connecting port located on the side wall of the regulating chamber. Each regulating channel has openings 3 at multiple predetermined points along its extension direction. These predetermined points can be set as needed or evenly distributed. The openings are used to connect the internal space of the regulating channel with the internal space of the regulating chamber. Movable sealing components are provided at the openings to block / open them. Bio-enhancing agents flow within the regulating channels 2, including butyric acid oxidizing bacteria, propionic acid oxidizing bacteria, acetic acid-producing methanogens, and hydrogen-nutritive methanogens. When the openings are open, the bio-enhancing agents flowing within the regulating channels 2 diffuse into the regulating chamber near the openings. The bio-enhancing agents can effectively stimulate the activity of anaerobic bacteria in this area, thereby improving the preparation efficiency.

[0024] Multiple temperature measuring components 4 are respectively located near the connecting port 5. These temperature measuring components can be temperature sensors. The internal space of the regulating chamber is divided into multiple areas according to the distribution points of the temperature measuring components. Figure 2 The area divided by the dashed line shown in the figure) has a temperature measuring component installed in the corresponding area, which can sense the temperature in that area and obtain the temperature value C3; Based on the temperature of the regulating chamber detected by the temperature measuring component, the fluid flow direction in the regulating channel is from the high-temperature area to the low-temperature area. According to the above flow direction, it can play a heat conduction effect, transferring the heat in the high-temperature area to the low-temperature area through the pipe wall or the fluid (bio-enhancing agent). The effects are twofold: first, to avoid the temperature in the high-temperature area from becoming too high and reducing the activity of anaerobic bacteria, whose general fermentation temperature is 50-55℃; second, to increase the temperature in the low-temperature area, optimize the reaction environment, and assist the bio-enhancing agent in stimulating the anaerobic bacteria in this area.

[0025] In addition, multiple regulating channels are grouped at the same height, and multiple groups are distributed along the height of the regulating chamber. Each group of regulating channels can be adjusted independently to achieve a wide range of temperature regulation within the regulating chamber 1.

[0026] During adjustment, in the first embodiment, the connecting ports with opposite positions are connected by the same adjustment channel, and there is no interference between multiple adjustment channels. Before the fluid flows, the temperatures of the connecting ports at both ends of the adjustment channel are compared, and the end with the higher temperature is designated as the fluid input end, and the end with the lower temperature is designated as the fluid output end.

[0027] In the second embodiment, multiple regulating channels are interconnected through multiple sets of capillary tubes 6. The capillary tubes increase the diffusion area of ​​the reacting liquid within the regulating channel 2, optimizing the heat conduction effect. Each set of capillary tubes is a ring structure composed of arc-shaped sub-tubes; multiple sets of capillary tubes are distributed from the center of the regulating chamber towards the sidewalls. During regulation, since multiple regulating channels correspond to multiple connection ports, the temperatures at multiple connection ports must first be compared. The connection port with the highest temperature is selected as the input port, and the connection port with the lowest temperature is selected as the output port, while the other connection ports are blocked.

[0028] It is understandable that a first control valve 7 is installed at each connection port outside the regulating chamber 1. Switching between the output port and the input port can be achieved simply by switching the pipe connected to the first control valve 7 and coordinating the opening and closing of the first control valve 7.

[0029] Meanwhile, the regulating channel and capillary tube 6 can be made of thermally conductive materials, such as copper or aluminum.

[0030] The opening and closing of the opening are determined by the temperature of its vicinity. The lower the temperature, the lower the activity of the nearby bacteria. In this case, it is necessary to stimulate the activity of the bacteria. That is, when the fluid temperature C1 in the regulating channel is higher than the external temperature C2, the movable sealing component cancels the sealing of the opening, making the opening in a conductive state. Conversely, the higher the temperature, the higher the activity of the nearby bacteria. That is, when the fluid temperature C1 in the regulating channel is equal to or lower than the external temperature C2, the opening is in a non-conductive state (i.e., blocked).

[0031] There are two ways to open the opening; In the third embodiment, the movable sealing component adopts a temperature-sensitive mechanical activation method: the movable sealing component includes a chamber 8 disposed on the outer wall of the adjustment channel 2, a baffle 9 movably disposed inside the chamber and moving against the outer wall of the adjustment channel, and a thermosensitive metal drive plate 10; specifically in this embodiment, the baffle 9 is a collar structure, fitted onto the outside of the adjustment channel 2; the baffle 9 is provided with a conduction port, and the baffle 9 will rotate relative to the adjustment channel 2 when switching operations, and when the conduction port coincides with the opening, the opening enters the conduction state.

[0032] The thermistor metal drive plate is composed of two metal sheets with different ductility when stimulated by temperature. One end of the thermistor metal drive plate is connected to a baffle, and the other end is connected to the outer wall of the adjustment channel. The thermistor metal drive plate has two sides that sense different temperatures. The two sides are in contact (or abut) with the outer wall of the adjustment channel 2 and the baffle 9 through contact points. When there is a temperature difference between the two sides, the thermistor metal drive plate bends, thereby driving the baffle to move.

[0033] In the fourth embodiment, another structure of the movable sealing component is disclosed, which is a second control valve indirectly controlled by a thermometer (a temperature sensor is sufficient). The opening size of the second control valve is determined by the temperature detected by the thermometer. The temperature measured by the thermometer is the ambient temperature C2. At this time, the bacterial agent output is more accurate. The lower the temperature, the more the amount output and the higher the activation effect. The higher the temperature, the lower the output. Obtain the opening adjustment value b, where the opening adjustment value b = the measured temperature of the temperature measuring component (thermometer) / the planned temperature; the planned temperature is the set normal fermentation temperature, which is a preset value input by the user. The actual opening B1 = (1 / opening adjustment value b) - 1.

[0034] In addition, this utility model also provides a biogas preparation method, including the following steps: Step 1: The organic raw material to be processed is crushed and separated by a crusher to obtain a solid part and a liquid part. The solid part is transported to the regulating chamber, and the liquid part is separated into a carbohydrate-rich part and a general wastewater part through a membrane concentration reactor, and then flow into the storage tank respectively. The carbohydrate-rich portion is transported to the enhanced microbial culture system as a nutrient component; the ordinary wastewater portion enters the equalization chamber and is mixed with the solid portion to adjust the substrate solid content to 10-12%. Step 2: The cultured bio-enhancing agent is added to the regulating chamber. The organic load of the anaerobic reaction is 3-5 kgVS / (m3·d), and the fermentation temperature is 50-55℃. The anaerobic fermentation reaction produces biogas, biogas slurry, and biogas residue. The biogas is treated for desulfurization and decarbonization. After the effluent is separated by a solid-liquid separation device, 60-80% of the liquid portion is returned to the regulating chamber.

[0035] The bio-enhancing microbial agent includes butyric acid oxidizing bacteria, propionic acid oxidizing bacteria, acetic acid-producing methanogens, and hydrogen-nutritive methanogens; the bio-enhancing microbial agent is added once a day, and the amount added is 2%-4% of the volatile solids content of the feed substrate; The enhanced microbial agent cultivation system requires daily feeding and discharging. The discharged material is directly added to the regulating chamber (anaerobic fermentation reactor), while the fed material is supplemented with some nutrients and then an equal volume of carbohydrate-rich waste liquid is added to maintain a dynamic balance of microbial agent content in the enhanced microbial agent cultivation tank.

[0036] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A microbial-enhanced biogas production system, characterized in that, include: The regulating chamber contains organic matter and anaerobic bacteria. Multiple regulating channels are distributed within the regulating chamber, with each end connected to a connecting port located on the side wall of the regulating chamber. Each regulating channel has an opening at multiple predetermined points along its extension direction, which connects the internal space of the regulating channel with the space within the regulating chamber. The opening is equipped with a movable sealing element that blocks or allows passage. When the fluid temperature C1 in the regulating channel is higher than the external temperature C2, the opening enters the conductive state.

2. The microbial-enhanced biogas production system according to claim 1, characterized in that, Multiple regulating channels are grouped at the same height, and multiple groups are distributed along the height of the regulating chamber.

3. The microbial-enhanced biogas production system according to claim 1 or 2, characterized in that, Multiple regulating channels are interconnected through multiple sets of capillary tubes; Each group of capillary channels is a ring structure composed of arc-shaped sub-channels; Multiple sets of capillary channels are distributed from the center of the regulating chamber toward the side wall.

4. The microbial-enhanced biogas production system according to claim 1, characterized in that, The regulating channel is made of a heat-conducting material.

5. The microbial-enhanced biogas production system according to claim 4, characterized in that, The thermally conductive material is made of copper or aluminum.

6. The microbial-enhanced biogas production system according to claim 1, characterized in that, Also includes: Multiple temperature measuring components are respectively installed near the connection port; the internal space of the regulating chamber is divided into multiple areas according to the distribution points of the temperature measuring components; Based on the temperature of the regulating chamber detected by the temperature measuring component, the fluid flow direction in the regulating channel is from the high temperature area to the low temperature area.

7. The microbial-enhanced biogas production system according to claim 1, characterized in that, The movable sealing component includes: The baffle moves in close contact with the outer wall of the adjustment channel; A thermistor metal drive plate has one end connected to a baffle and the other end connected to the outer wall of the adjustment channel. The thermistor metal drive plate has two sides that sense different temperatures. When there is a temperature difference between the two sides, the thermistor metal drive plate bends to drive the baffle to move.

8. The microbial-enhanced biogas production system according to claim 1, characterized in that, The movable sealing component is a second control valve indirectly controlled by a temperature sensor. The opening size of the second control valve is determined by the temperature detected by the temperature sensor. The temperature measured by the temperature sensor is the ambient temperature C2. Obtain the opening adjustment value b, where the opening adjustment value b = the actual measured temperature of the thermometer / the planned temperature; The planned temperature is the set normal fermentation temperature; The actual opening B1 = (1 / opening adjustment value b) - 1.

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