Kitchen waste treatment and display system based on double-chamber microbial fuel cell

Abstract

The utility model discloses a kitchen waste treatment and display system based on a double-chamber microbial fuel cell. The kitchen waste treatment and display system comprises an anode, a cathode, a kitchen waste collection chamber, a water chamber, an ion exchange membrane, an electric signal collector, a display, a deodorization pipe, an aeration pipe and an air inlet device, the kitchen waste collecting chamber and the water chamber are communicated with each other and are separated by an ion exchange membrane; the anode is arranged in the kitchen waste collecting chamber, the cathode is arranged in the water chamber, the anode and the cathode are connected through a wire, and the wire is further connected with an electric signal collector; an aeration pipe is arranged in the water chamber and is connected with an air inlet device outside the water chamber. According to the kitchen waste treatment and display system disclosed by the utility model, indigenous microorganisms in the kitchen waste are used for carrying out anaerobic decomposition on the kitchen waste, and generated electrons reach the cathode through the lead and are subjected to reduction reaction with dissolved oxygen in water, so that current is generated; the public can perform aeration by participating in operation of the manual air inlet device and observe the increase of the electricity production quantity and the kitchen waste treatment quantity.

Description

Technical Field

[0001] The utility model belongs to the technical field of garbage treatment, and in particular relates to a kitchen waste treatment and display system based on a double-chamber microbial fuel cell. Background Art

[0002] Kitchen waste is food-related waste generated in daily life, mainly including leftover meals, fruit peels and other food residues, mainly from households, canteens, restaurants, food processing units, etc. The main components of this type of waste are cellulose, starch, protein, lipids and inorganic salts, etc., and it also contains a lot of water. Since kitchen waste is easy to corrupt, it is easy to cause environmental problems if it is not handled properly. Traditional methods of kitchen waste treatment mainly include feeding animals, landfilling, aerobic composting, etc. Among them, since kitchen waste is easy to corrupt and breed bacteria, feeding animals is easy to cause diseases; the landfill method has the problem of occupying too much land and being difficult to promote; aerobic composting has the problem of producing leachate that pollutes the soil and groundwater and emits odor.

[0003] Microbial fuel cells use the electricity-producing bacteria on the anode surface to decompose organic matter and generate electrons, and use the dissolved oxygen on the cathode surface as an electron acceptor, thereby achieving the decomposition of organic matter while generating a small amount of electricity. Since kitchen waste is rich in organic matter, it can be decomposed using microbial fuel cell technology. The decomposition products are CO2 and H2O, and no secondary pollution will be generated. In addition, since microbial fuel cells are closed devices, kitchen waste will not pollute the soil and groundwater during the decomposition process, and odor is not easy to emit. Therefore, it is expected to overcome the shortcomings of the above-mentioned traditional treatment methods. Utility Model Content

[0004] The purpose of the utility model is to provide a kitchen waste treatment and display system based on a dual-chamber microbial fuel cell, including an anode, a cathode, a kitchen waste collection chamber, a water chamber, an ion exchange membrane, an electrical signal collector, a display, an aeration pipe, and an air intake device;

[0005] The kitchen waste collection chamber and the water chamber are interconnected and separated by an ion exchange membrane;

[0006] The anode is placed in the kitchen waste collection chamber, the cathode is placed in the water chamber, the anode and the cathode are connected by a wire, and the wire is also connected to an electrical signal collector;

[0007] The electrical signal collector is connected in parallel with a display;

[0008] An aeration pipe is arranged in the water chamber, and the aeration pipe is connected to the air intake device outside the water chamber.

[0009] Furthermore, the ion exchange membrane is a cation exchange membrane or an anion exchange membrane.

[0010] Furthermore, the anode is made of stainless steel, titanium, carbon cloth, carbon felt or carbon brush.

[0011] Furthermore, the cathode is made of platinum, stainless steel, titanium, carbon cloth or carbon felt.

[0012] Furthermore, a top cover A is provided on the top of the food waste collection chamber to close the food waste collection chamber; and a top cover B is provided on the top of the water chamber to close the water chamber.

[0013] Furthermore, the top cover A is provided with an opening for connecting one end of a deodorizing pipe, and the other end of the deodorizing pipe passes through the top cover B and is inserted into the bottom of the water chamber.

[0014] Furthermore, the kitchen waste collection chamber is filled with kitchen waste, and the water chamber is filled with tap water or distilled water with a salt content not exceeding 4%.

[0015] Furthermore, the air intake device is a hand-pinch air bag, a manual air pump or a foot-operated air pump.

[0016] The kitchen waste treatment system of the utility model utilizes the indigenous microorganisms in the kitchen waste to perform anaerobically decompose the kitchen waste. The generated electrons reach the cathode through the wire and undergo a reduction reaction with the dissolved oxygen in the water, thereby generating electric current. At the same time, the sour and smelly gas generated during the anaerobic decomposition of the kitchen waste is introduced into the water chamber through the deodorizing pipe for absorption, thereby avoiding air pollution.

[0017] The utility model displays the progress of kitchen waste treatment and the accumulated power generation to the public through a display screen. The public can also participate in the operation of the artificial air intake device to aerate the cathode, thereby accelerating the decomposition of kitchen waste and increasing the power generation. The utility model not only realizes the resource utilization, harmlessness and green treatment of kitchen waste, but also introduces public participation and displays to the public, allowing the public to understand a new kitchen waste treatment technology, realizing the function of environmental protection science popularization. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The schematic diagram of the kitchen waste treatment system of the utility model is shown in FIG. 1 is an anode, 2 is a cathode, 3 is a kitchen waste collection chamber, 4 is a water chamber, 5 is an ion exchange membrane, 6 is an electrical signal collector, 7 is a display screen, 8 is a top cover A, 9 is a deodorizing pipe, 10 is an aeration pipe, 11 is a top cover B, and 12 is an air intake device. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention will be described in detail below in conjunction with the examples. It should be understood that the following examples are provided only for the purpose of illustration and are not intended to limit the scope of the present invention. Those skilled in the art may make various modifications and substitutions to the present invention without departing from the purpose and spirit of the present invention. Example 1

[0020] like Figure 1 As shown, the utility model proposes a kitchen waste treatment and display system based on a dual-chamber microbial fuel cell, including an anode 1, a cathode 2, a kitchen waste collection chamber 3, a water chamber 4, an ion exchange membrane 5, an electrical signal collector 6, a display screen 7, a top cover A 8, an aeration pipe 10, a top cover B 11, and an air intake device 12.

[0021] The kitchen waste collection chamber 3 and the water chamber 4 are interconnected and separated by an ion exchange membrane 5. The kitchen waste collection chamber 3 is filled with kitchen waste, and the water chamber 4 is filled with tap water or distilled water with a salt content of no more than 4%. The anode 1 is placed in the kitchen waste collection chamber 3, and the cathode 2 is placed in the water chamber 4. The anode 1 and the cathode 2 are connected by a wire, and the wire is also connected to an electric signal collector 6. The electric signal collector 6 monitors the current or voltage of the circuit, converts it into power generation and the corresponding amount of kitchen waste organic carbon removed, and displays it through a display 7 installed on the side of the water chamber. An aeration pipe 10 is arranged in the water chamber 4, and the aeration pipe 10 is connected to an air intake device 12 outside the water chamber. The air intake device 12 sends air into the aeration pipe 10, and bubbles are formed through the small holes opened on the aeration pipe 10 to enter the water body around the cathode 2, providing oxygen for the cathode 2 to increase the power generation and the amount of kitchen waste organic carbon removed.

[0022] In order to prevent the sour and smelly gas generated by the fermentation of kitchen waste from polluting the air environment, a top cover A 8 is provided on the top of the kitchen waste collection chamber 3 to close the kitchen waste collection chamber 3, and the top cover A 8 is detachable to facilitate the loading of kitchen waste into the kitchen waste collection chamber 3. A top cover B 11 is provided on the top of the water chamber 4. The top cover A 8 is provided with an opening for connecting one end of a deodorizing pipe 9, and the other end of the deodorizing pipe 9 passes through the top cover B 11 and is inserted into the bottom of the water chamber 4, so as to discharge the sour and smelly gas discharged from the kitchen waste collection chamber 3 into the atmosphere after being absorbed and dissolved by the solution in the water chamber 4.

[0023] Three food waste treatment systems based on dual-chamber microbial cells (hereinafter referred to as "systems") were constructed in the laboratory as three parallels. A square carbon felt with a side length of 15 cm was laid at the bottom of each food waste collection chamber as an anode, and 500 g of leftover food from the canteen was poured into each food waste collection chamber. 2 L of tap water containing 1% sodium chloride was added to the water chamber, a platinum mesh (diameter 10 cm) was installed 1 cm below the water surface as a cathode, and the aeration tube was fixed under the cathode. The anode and cathode were connected by titanium wire, and the electrical signal collector collected the current data on the wire in real time, and according to the decomposition of 1 mol of organic carbon corresponding to the generation of 4 mol of electrons, the amount of electricity generated during the decomposition of food waste and the amount of decomposed organic carbon were displayed in real time on the display. During this period, air was input into the aeration tube by operating the foot-operated air pump, and a large number of bubbles were formed under the cathode. The current increased by more than 40 μA, and the power generation and organic carbon decomposition increased rapidly accordingly.

[0024] On the fifth day after adding food waste, the current of the three parallel "systems" increased rapidly and stabilized in the range of 180-240 μA on the ninth day. During the operation of the system in the laboratory, more than 100 students visited and operated the pedal-type air pump, which played the role of environmental protection science education.

Claims

1. A kitchen waste treatment and display system based on a dual-chamber microbial fuel cell, characterized in that: It comprises an anode (1), a cathode (2), a food waste collection chamber (3), a water chamber (4), an ion exchange membrane (5), an electrical signal collector (6), a display (7), an aeration pipe (10), and an air intake device (12); The kitchen waste collection chamber (3) and the water chamber (4) are interconnected and separated by an ion exchange membrane (5); The anode (1) is placed in a food waste collection chamber (3), the cathode (2) is placed in a water chamber (4), the anode (1) and the cathode (2) are connected via a wire, and the wire is also connected to an electrical signal collector (6); The electrical signal collector (6) is connected in parallel with a display (7); An aeration pipe (10) is arranged in the water chamber (4), and the aeration pipe (10) is connected to an air intake device (12) outside the water chamber.

2. The kitchen waste treatment and display system based on a dual-chamber microbial fuel cell according to claim 1, characterized in that: A top cover A (8) is provided on the top of the food waste collection chamber (3), and a top cover B (11) is provided on the top of the water chamber (4).

3. The kitchen waste treatment and display system based on a dual-chamber microbial fuel cell according to claim 2, characterized in that: The top cover A (8) is provided with an opening for connecting one end of a deodorizing pipe (9), and the other end of the deodorizing pipe (9) passes through the top cover B (11) and is inserted into the bottom of the water chamber (4).

4. The kitchen waste treatment and display system based on a dual-chamber microbial fuel cell according to claim 1, characterized in that: The aeration pipe (10) is arranged below the cathode (2).

5. The kitchen waste treatment and display system based on a dual-chamber microbial fuel cell according to claim 1, characterized in that: The ion exchange membrane (5) is a cation exchange membrane or an anion exchange membrane.

6. The kitchen waste treatment and display system based on a dual-chamber microbial fuel cell according to claim 1, characterized in that: The material of the anode (1) is stainless steel, titanium, carbon cloth, carbon felt or carbon brush.

7. The kitchen waste treatment and display system based on a dual-chamber microbial fuel cell according to claim 1, characterized in that: The cathode (2) is made of platinum, stainless steel, titanium, carbon cloth or carbon felt.

8. The kitchen waste treatment and display system based on a dual-chamber microbial fuel cell according to claim 1, characterized in that: The kitchen waste collection chamber (3) is filled with kitchen waste, and the water chamber (4) is filled with tap water or distilled water with a salt content not exceeding 4%.

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