A biotrickling filter device capable of purifying organic wastewater and generating electricity

Abstract

The present invention provides a biological trickling filter device that can purify organic wastewater and generate electricity, including: a battery assembly, a biological trickling filter assembly, the battery assembly is placed in the biological trickling filter, the other end of the trickling filter pipe is connected to a water tank, the water pump works to make water flow through the trickling filter pipe, and the water flows through the leak hole and then drips into the battery assembly in the form of water drops through the drip hole to provide power for the electrical component. The present invention combines the biological trickling filter assembly and the battery assembly, and utilizes the long-term impact of water drops on the battery assembly to make the battery accumulate charge and generate electrical energy, thereby providing the power required by the electrical component, forming a biological treatment system that generates power while treating wastewater.

Description

Technical Field

[0001] The invention relates to the technical field of microbial fuel cells, and in particular to a biotrickling filter device capable of purifying organic wastewater and generating electricity. Background Art

[0002] The biological trickling filter process belongs to the biofilm method in sewage biological treatment. Its advantages include small footprint, easy operation and management, small amount of sludge, no sludge expansion problem, and can maintain a high sludge age and relatively stable biological phase. Multi-layer biological trickling filters are easier to disassemble and replace fillers than ordinary biological trickling filters, and are conducive to uniform water distribution.

[0003] Microbial fuel cells are energy converters that can directly convert organic matter into electrical energy. They can be used in sewage treatment to achieve the dual effects of wastewater treatment and electrical energy regeneration. In recent years, with the continuous deepening of research in this field, air cathode microbial fuel cells have gradually become the main focus, because the atmosphere can supply an endless supply of oxygen and has high redox properties, making them suitable as the most common electron acceptor for the cathode. However, most of the existing air cathode microbial fuel cells use Nafion materials as proton membranes, which have the disadvantage of being too expensive and limiting their wide range of applications. Summary of the invention

[0004] The present invention discloses a biotrickling filter device which can purify organic wastewater and generate electricity. After integrating the two biological treatment systems of biotrickling filter and microbial fuel cell, it can not only treat organic wastewater but also generate electricity at the same time, thus achieving the dual goals of waste reduction and new energy.

[0005] The present invention adopts the following scheme:

[0006] A biotrickling filter device capable of purifying organic wastewater and generating electricity, comprising:

[0007] A biological trickling filter box assembly, comprising a support frame, a trickling filter pipe, a water pump, a water tank and a biological trickling filter box, wherein the biological trickling filter box is fixed on the support frame, drip holes are evenly distributed in the middle of the biological trickling filter box, the water pump is connected to the trickling filter pipe, and a plurality of leakage holes are arranged on the side wall of one end of the trickling filter pipe and is placed above the biological trickling filter box;

[0008] A battery assembly, wherein the battery assembly is in an integrated tubular column type, an opening is provided on the top of the column, a water-absorbing hydrogel and a conductive porous ceramic ring are provided inside, the ceramic ring is provided with a cathode and an anode, a wire is wound around the cathode and the anode, the wire passes through the middle of the ceramic ring and extends to the opening, the anode and the cathode at both ends of the battery assembly are connected by wires, and an electrical component is connected in the middle;

[0009] A battery assembly is placed in the biological trickling filter box, the other end of the trickling filter pipe is connected to a water tank, the water pump works to make water flow through the trickling filter pipe, and the water flows through the leakage hole and then drips into the battery assembly in the form of water drops through the drip hole to provide power for the electrical component.

[0010] As a further improvement, the battery assembly is a microbial fuel cell assembly.

[0011] As a further improvement, the water-absorbing hydrogel divides the battery assembly into an upper half and a lower half, and the ceramic ring is located in the upper half and the lower half of the tube column, the upper half is the cathode, and the lower half is the anode.

[0012] As a further improvement, the coating thickness of the water-absorbent hydrogel is 5 mm to 50 mm.

[0013] As a further improvement, the outer edge of the wire is provided with a heat shrink film insulation material.

[0014] As a further improvement, multiple battery assemblies are placed horizontally in the biological trickling filter box, the anode or cathode at one end of the battery assembly is connected to the cathode or anode at one end of another battery assembly in turn, the anodes and cathodes at both ends of the multiple battery assemblies are connected by wires and an electrical component is connected in the middle.

[0015] As a further improvement, the spacing between each battery assembly is greater than 3 mm.

[0016] As a further improvement, the biological trickling filter box assembly is provided with a plurality of biological trickling filter boxes, and the biological trickling filter boxes are fixed on the support frame in a horizontal arrangement or a vertical manner, and a battery assembly is installed in each of the biological trickling filter boxes, and the cathode or anode at one end of the battery assembly is connected to the anode or cathode of another battery assembly in sequence from left to right or from top to bottom, and the anode and cathode at both ends of the battery assembly are connected by wires and an electrical assembly is connected in the middle.

[0017] As a further improvement, the voltage generated by a single battery assembly is between 0.15V and 0.9V, and multiple battery assemblies are connected in series, in parallel, or in series and parallel to match the rated power of the electrical assembly.

[0018] As a further improvement, one end of the drip filter connected to the water tank is provided with a filter head, and the other end is provided with a plug.

[0019] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0020] The present invention combines the biological trickling filter box assembly with the battery assembly, uses water flow to form water droplets to perform trickling filtration on the battery assembly, so that the microorganisms in the water are attached to the battery assembly, and the microorganisms in the microbial battery assembly can decompose organic matter in the water, thereby purifying the wastewater. The long-term impact of water droplets on the battery assembly can cause the battery to accumulate charge and generate electrical energy. The connection mode of the battery assembly in series, parallel or series-parallel can be adopted to amplify its voltage, current or power, thereby providing the power required by the electrical assembly, forming a biological treatment system that generates power while treating wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 is a schematic diagram of a symmetrical cross-sectional structure of a battery assembly of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the battery assembly of the present invention placed in a biological trickling filter box;

[0025] Figure 4 It is a schematic diagram of the structure of the biological trickling filter box of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the drip filter of the present invention with a plug at one end;

[0027] Icons: 1-biological trickling filter box assembly; 2-battery assembly; 3-biological trickling filter box; 4-drip filter tube; 5-water pump; 6-support frame; 7-water tank; 8-drip filter box cover; 21-opening; 22-water-absorbent hydrogel; 23-ceramic ring; 24-plastic tube; 25-plastic cover; 26-small hole; 27-anode; 28-cathode; 31-drip hole; 41-leakage hole; 42-filter head; 43-plug. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] Example

[0034] Combination Figures 1 to 5 The present embodiment provides a biological trickling filter box 3 device capable of purifying organic wastewater and generating electricity, comprising: a battery assembly 2 and a biological trickling filter box assembly 1, wherein the battery assembly 2 is connected to an electrical assembly, and the battery assembly 2 is placed in the biological trickling filter box assembly 1. After the biological trickling filter box assembly 1 operates the battery assembly 2 through trickling filtration for several days, the battery assembly 2 can generate electrical energy, thereby providing power for the electrical assembly.

[0035] The biological trickling filter box assembly 1 includes a support frame 6, a trickling filter tube 4, a water pump 5, a water tank 7 and a biological trickling filter box 3. The biological trickling filter box 3 is fixed on the support frame 6. There are evenly distributed drip holes 31 in the middle of the biological trickling filter box 3. The water pump 5 is connected to the trickling filter tube 4. A plurality of leak holes 41 are arranged on the side wall of the pipeline at one end of the trickling filter tube 4 and are placed above the biological trickling filter box 3. It should be noted that the dripping filter tube 4 can be one or more. According to the width distribution of the biological trickling filter box 3, there can be corresponding dripping filter tubes 4 above the dripping holes 31 on the biological trickling filter box 3 to ensure that the biological trickling filter box 3 can be used evenly to prevent local water droplets from passing.

[0036] The battery assembly 2 is an integrated tubular column type, with an opening 21 on the top of the column, a water-absorbing hydrogel 22 and a conductive porous ceramic ring 23 arranged inside, the ceramic ring 23 is provided with a cathode 28 and an anode 27, and a wire is wound around the cathode 28 and the anode 27, and the wire passes through the middle of the ceramic ring 23 and extends to the opening 21, and the anode 27 and the cathode 28 at both ends of the battery assembly 2 are connected by wires and an electrical component is connected in the middle;

[0037] Reference Figure 2The battery assembly 2 is an integrated column-type microbial fuel cell assembly 2, with a threaded plastic upper cover 25 having a plurality of openings 21 on the top, a water-absorbing hydrogel 22 arranged inside a threaded cylindrical plastic tube 24, and a conductive porous ceramic ring 23. The water-absorbing hydrogel 22 divides the threaded cylindrical plastic tube 24 into an upper half and a lower half, and the conductive porous ceramic ring 23 is located in the upper half and the lower half of the column, the upper half is a cathode 28, and the lower half is an anode 27. There is no opening on the wall of the threaded cylindrical plastic tube 24 in the upper half, and a plurality of small holes 26 are opened on the wall of the threaded cylindrical plastic tube 24 in the lower half. In this embodiment, the coating thickness of the water-absorbing hydrogel 22 is 5 mm to 50 mm, and preferably, the coating thickness of the water-absorbing hydrogel 22 is 40 mm. It should be noted that, when the thickness of the water-absorbing hydrogel 22 is greater, the upper half and the lower half can be better divided, preventing the water flow from connecting the cathode 28 and the anode 27 of the ceramic ring 23, which may cause a short circuit.

[0038] Furthermore, the positive and negative electrodes are connected by winding the corrosion-resistant cathode 28 titanium wire around the conductive porous carbonized ceramic ring 23 at the upper cathode 28, and the conductive porous carbonized ceramic ring 23 at the lower anode 27 is wound with the anode 27 titanium wire, and then the anode 27 titanium wire and the cathode 28 titanium wire are respectively passed through the channel in the middle of the conductive porous carbonized ceramic ring 23 and extended to the opening 21 at the top of the column. It should be noted that the outer edges of the anode 27 titanium wire and the cathode 28 titanium wire need to be covered with heat shrink film insulation material to prevent the positive and negative electrodes from contacting each other and forming a short circuit.

[0039] Several battery assemblies 2 are placed horizontally in the biological trickling filter box 3, and the other end of the trickling filter tube 4 is connected to the water tank 7. The water pump 5 is turned on to extract the water in the water tank 7 into the dripping tube. When the water flows through the leak hole 41, it will drip down from the leak hole 41, so that the water flows in the form of water drops and drips onto the battery assembly 2 below. It should be noted that only the lower half of the battery assembly 2 is installed in the biological trickling filter box 3, and the upper half with the opening 21 is outside the biological trickling filter box 3. Since water is conductive, the anode 27 and the cathode 28 in the battery assembly 2 are prevented from contacting each other through water to form a short circuit. Water drops fall on the conductive porous ceramic ring 23 located at the lower anode 27, so that the microorganisms in the wastewater can attach to the conductive porous ceramic ring 23 of the anode 27, and can provide the organic matter required for the microorganisms to decompose. The microbial battery assembly 2 decomposes the organic matter to purify the water quality, and the electrons generated in the decomposition process accumulate in the conductive porous ceramic ring 23, and are transferred to the cathode 28 through the titanium wire of the anode 27 and the wire connected to the cathode 28, while the protons generated in another decomposition process are transferred to the cathode 28 through the water-absorbing hydrogel 22; at this time, the electrons and protons are in the cathode 28 together, and they react with the oxygen in the air to produce water. The remaining water flows into the water tank 7 through the drip hole 31 in the biological trickling filter box 3, and the water in the water tank 7 is continuously pumped to the trickling filter 4 by the water pump 5 to form a cycle. The small holes 26 set on the lower half allow more microorganisms in the wastewater to attach to the ceramic ring 23. Through circulation, not only can the wastewater in the water tank 7 be purified, but the battery assembly 2 can also be drip-filtered for a long time, so that the battery assembly 2 accumulates charges and finally generates electricity. It can be understood that in order to prevent large particles of impurities in the wastewater from entering the drip filter 4 and blocking the leakage hole 41, a filter head 42 is provided on one end of the drip filter 4 extending into the water tank 7, and in order that the water entering the drip filter 4 can pass through the biological drip filter box 3 and return to the water tank 7, a plug 43 is provided on the other end of the drip filter 4, so that the water entering the drip filter 4 can drip into the biological drip filter box 3 through the leakage hole 41 and then flow back to the water tank 7 through the drip hole 31.

[0040] Reference Figure 1, multiple biological trickling filter boxes 3 can be placed above the water tank 7. The specific support method can be to set an outer support frame around the water tank 7, and then fix the inner support frame on the outer support frame. The inner support frame can be divided into one or more layers. One or more biological trickling filter boxes 3 can be placed on the inner support frame of one layer, so the biological trickling filter boxes 3 can be fixed in a horizontal arrangement or vertical manner, or they can be placed in a way of using both together. Multiple trickling filter tubes 4 are installed at the top according to the width, and the support frame 6 can also be covered with a trickling filter box cover 8. When several battery assemblies 2 are installed in the biological trickling filter box 3, the anode 27 or cathode 28 at one end of the battery assembly 2 is connected to the cathode 28 or anode 27 at one end of another battery assembly 2 in turn, and the remaining anodes 27 and cathodes 28 at both ends that are not connected are connected by wires and an electrical component is connected in the middle. The voltage generated by a single battery assembly 2 is between 0.15V and 0.9V. By connecting multiple battery assemblies 2 in series, in parallel, or in series and parallel, the voltage and current of the power generation assembly can be amplified to match the rated voltage of the electrical assembly, and the electrical assembly can be turned on. It should be noted that the spacing between each battery assembly 2 is greater than 3mm, which is also to prevent the same water drop from dripping on two adjacent battery assemblies 2.

[0041] It can be understood that when the biological trickling filter box 3 is fixed on the support frame 6 in a horizontal arrangement or vertical manner, the biological trickling filter box 3 is installed with a battery assembly 2, and the cathode 28 or anode 27 at one end of the battery assembly 2 is connected to the anode 27 or cathode 28 of another battery assembly 2 from left to right or from top to bottom in sequence, and the anode 27 and cathode 28 at both ends of the remaining unconnected battery assembly 2 are connected by wires and an electrical component is connected in the middle. The titanium wire wires of the anode 27 and the cathode 28 in several integrated column-type microbial fuel cell assemblies 2 can be respectively connected in series, parallel or series-parallel connection, or in series, parallel or series-parallel connection, or in mixed series-parallel connection, and the voltage and current of the power generation assembly can be amplified, and then a low-power small electrical appliance can be connected to start the small electrical appliance.

[0042] The voltage output by the device varies with the type of organic wastewater and the circuit connection method of the microbial fuel cell assembly 2. According to the voltage, current, and power range required by the connected electrical components, series, parallel, or series-parallel connection methods can be adopted to amplify the voltage, current, or power.

[0043] The above are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

Claims

1. A biotrickling filter device capable of purifying organic wastewater and generating electricity, characterized in that: include: A biological trickling filter box assembly, comprising a support frame, a trickling filter pipe, a water pump, a water tank and a biological trickling filter box, wherein the biological trickling filter box is fixed on the support frame, drip holes are evenly distributed in the middle of the biological trickling filter box, the water pump is connected to the trickling filter pipe, and a plurality of leakage holes are arranged on the side wall of one end of the trickling filter pipe and is placed above the biological trickling filter box; A battery assembly, wherein the battery assembly is in an integrated column type, and an opening is provided on the top of the column, wherein the battery assembly comprises a threaded cylindrical plastic tube, wherein a water-absorbing hydrogel and a conductive porous ceramic ring are provided inside the threaded cylindrical plastic tube, wherein the ceramic ring is provided with a cathode and an anode, wherein both the cathode and the anode are wound with a wire, wherein the wire passes through the middle of the ceramic ring and extends to the opening; wherein the water-absorbing hydrogel divides the threaded cylindrical plastic tube into an upper half and a lower half, wherein the ceramic ring is respectively located in the upper half and the lower half, wherein the upper half is the cathode and the lower half is the anode, wherein the tube wall of the threaded cylindrical plastic tube in the upper half has no openings, and the tube wall of the threaded cylindrical plastic tube in the lower half has a plurality of small holes; A battery assembly is placed in the biological trickling filter box, the other end of the trickling filter pipe is connected to a water tank, the water pump works to make water flow through the trickling filter pipe, and the water flows through the leak hole and then drips into the battery assembly in the form of water drops through the drip hole to provide power for the electrical components; a plurality of battery assemblies are placed horizontally in the biological trickling filter box, the anode or cathode at one end of each battery assembly is connected in turn with the cathode or anode at one end of another battery assembly, and the anodes or cathodes of the battery assemblies at both ends of the plurality of battery assemblies are connected by wires and an electrical component is connected in the middle.

2. The biotrickling filter device capable of purifying organic wastewater and generating electricity according to claim 1, characterized in that: The biological trickling filter box assembly is provided with a plurality of biological trickling filter boxes, and the biological trickling filter boxes are fixed on the support frame in a horizontal arrangement or a vertical manner. A battery assembly is installed in each of the biological trickling filter boxes, and the cathode or anode at one end of each battery assembly is connected to the anode or cathode of another battery assembly from left to right or from top to bottom. The anodes or cathodes of the battery assemblies at both ends of the plurality of battery assemblies are connected by wires and an electrical assembly is connected in the middle.

3. The biotrickling filter device capable of purifying organic wastewater and generating electricity according to claim 2, characterized in that: The voltage generated by a single battery assembly is between 0.15V and 0.9V, and multiple battery assemblies are connected in series, in parallel, or in series and parallel to match the rated voltage of the electrical assembly.

4. The biotrickling filter device capable of purifying organic wastewater and generating electricity according to claim 1, characterized in that: The battery component is a microbial fuel cell component.

5. The biotrickling filter device capable of purifying organic wastewater and generating electricity according to claim 1, characterized in that: The coating thickness of the water-absorbent hydrogel is 5 mm to 50 mm.

6. The biotrickling filter device capable of purifying organic wastewater and generating electricity according to claim 1, characterized in that: The outer edge of the wire is provided with heat shrinkable film insulation material.

7. The biotrickling filter device capable of purifying organic wastewater and generating electricity according to claim 1, characterized in that: The spacing between each of the battery components is greater than 3 mm.

8. The biotrickling filter device capable of purifying organic wastewater and generating electricity according to claim 1, characterized in that: One end of the drip filter pipe connected to the water tank is provided with a filter head, and the other end is provided with a plug.

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