Small-scale test device for research on anaerobic fermentation of granular sludge

Abstract

The utility model discloses a small-scale test device for research on anaerobic fermentation of granular sludge. The small-scale test device comprises a fermentation bottle, a granular sludge feeding component, a granular sludge sampling component, an exhaust component and a stirring and mixing device, the granular sludge feeding and sampling component comprises a sample feeding pipe and a sampling pipe which penetrate through the sealing rubber plug of the fermentation bottle, the sample feeding pipe and the sampling pipe enter the fermentation liquid in the fermentation bottle, the feeding pipe is provided with a manual ball valve, and the sampling pipe is provided with a manual ball valve and a check valve. The exhaust component comprises an exhaust pipe, a manual ball valve and an air collecting bag, the exhaust port is connected with the air collecting bag, and a closed environment is kept. The stirring device comprises a stirring rotor and a magnetic stirrer which are arranged in the fermentation bottle, and fermentation liquor is kept uniform in the sampling process. According to the small-scale test device for the granular sludge anaerobic fermentation research, the difficulty in a granular sludge fermentation test can be solved, the device is simple to assemble, the sampling is uniform and sufficient, and the anaerobic environment is stable.

Description

Technical Field

[0001] This utility model relates to the field of anaerobic fermentation of granular sludge, and in particular to a pilot-scale device for research on anaerobic fermentation of granular sludge. Background Technology

[0002] In the field of wastewater treatment, anaerobic fermentation of sludge is an effective biological treatment method that can effectively recover carbon, nitrogen, and phosphorus sources, thereby achieving resource reuse. In recent years, granular sludge technology has received widespread attention due to its high treatment efficiency. Compared with traditional flocculent sludge, granular sludge exhibits higher acid production efficiency during anaerobic fermentation. Therefore, research on the anaerobic fermentation process of granular sludge is increasing.

[0003] However, despite the numerous theoretical advantages of granular sludge technology, its engineering applications have not yet been widely adopted. Under the same load, granular sludge yields lower output compared to activated sludge, leading to difficulties in obtaining granular sludge samples at the laboratory level, which limits the progress of research and technological development. Furthermore, the high structural density and excellent settling properties of granular sludge make ensuring sample homogeneity during experiments more challenging, potentially affecting the accuracy and reliability of experimental results.

[0004] Therefore, it is necessary to design a granular sludge anaerobic fermentation device suitable for small-scale experiments, which will facilitate the study of anaerobic fermentation of granular sludge and overcome the difficulties in sample processing and sampling. Utility Model Content

[0005] This invention proposes a small-scale device for anaerobic fermentation research of granular sludge, which can effectively solve the problem of difficult sampling in granular sludge fermentation experiments in the above-mentioned background art.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A pilot-scale apparatus for anaerobic fermentation research of granular sludge includes a fermentation flask, a granular sludge feeding component, a granular sludge sampling component, an exhaust component, and a mixing device. The fermentation flask includes a main body and a sealing rubber stopper. The granular sludge feeding component includes a feed pipe passing through the sealing rubber stopper, and a manual ball valve is installed on the feed pipe. The granular sludge sampling component includes a sampling pipe passing through the sealing rubber stopper, and a manual ball valve and a check valve are installed on the sampling pipe. The exhaust component includes an exhaust pipe passing through the sealing rubber stopper, and a manual ball valve and a check valve are installed on the exhaust pipe. A gas collection bag is installed at the upper end of the exhaust pipe.

[0008] Furthermore, the fermentation bottle body has a capacity of 250-1000 mL, and the interior of the fermentation bottle body is used to hold the granular sludge fermentation liquid.

[0009] Furthermore, the feed pipe has a diameter of 3-6 mm and enters the bottom of the fermentation liquid through a sealing rubber stopper. A manual ball valve is installed on the feed pipe, and granular sludge can be injected using a syringe.

[0010] Furthermore, the sampling tube has a diameter of 3-6 mm and enters the bottom of the fermentation liquid through a sealed rubber stopper. The sampling tube is equipped with a manual ball valve and a check valve, and the fermentation granular sludge can be extracted using a syringe.

[0011] Furthermore, the exhaust pipe has a diameter of 2-4 mm, enters the upper part of the fermentation bottle through a sealing rubber stopper, and does not enter the fermentation liquid. A manual ball valve and a check valve are installed on the exhaust pipe.

[0012] Furthermore, the exhaust pipe is connected to a 500-2000 mL gas collection bag; when feeding, the gas collection bag is emptied and the manual ball valve on the exhaust pipe is opened; when sampling, the gas collection bag is filled with nitrogen and the manual ball valve on the exhaust pipe is opened.

[0013] Furthermore, the mixing device consists of a magnetic stirrer and a stirring rotor. The stirring rotor is placed inside the fermentation bottle. When taking samples, the fermentation bottle is placed on the mixing device to ensure uniform sampling.

[0014] The beneficial effects of this utility model are as follows:

[0015] (1) The device has the characteristics of simple structure and small size, so it does not require a large amount of granular sludge when conducting the experiment, which greatly facilitates the anaerobic fermentation experiment of granular sludge.

[0016] (2) The device includes a stirring and mixing device, which can ensure the uniformity of the test sample and reduce the error caused by the compact structure and settling performance of granular sludge.

[0017] (3) The device is designed with a gas collection bag and a check valve, which effectively prevents the entry of external air during feeding and sampling, avoiding adverse effects on the anaerobic fermentation environment, thus helping to maintain stable experimental conditions and promote the smooth progress of the research. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a small-scale device for anaerobic fermentation research of granular sludge, as shown in the embodiment.

[0019] The attached diagram is labeled as follows: 1. Fermentation bottle body; 2. Sealing rubber stopper; 3. Feed pipe; 4. Manual ball valve; 5. Sampling tube; 6. Check valve; 7. Exhaust pipe; 8. Gas collection bag; 9. Magnetic stirrer; 10. Stirring rotor. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions in the attached figures, while the terms “bottom” and “top,” “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0022] This invention relates to a pilot-scale device for anaerobic fermentation research of granular sludge. The pilot-scale device includes a fermentation bottle, a granular sludge feeding component, a granular sludge sampling component, an exhaust component, and a stirring and mixing device.

[0023] The fermentation bottle consists of a 250-1000 mL fermentation bottle body 1 and a sealing rubber stopper 2. The interior of the fermentation bottle body 1 is used to hold the granular sludge fermentation liquid.

[0024] The granular sludge injection component enters the bottom of the fermentation broth through a 3-6 mm injection tube 3 and a sealing rubber plug 2. A manual ball valve 4 is installed on the injection tube 3, and the granular sludge can be injected using a syringe.

[0025] The granular sludge sampling component enters the bottom of the fermentation liquid through a 3-6 mm sampling tube 5 and a sealing rubber stopper 2. The sampling tube 5 is equipped with a manual ball valve 4 and a check valve 6. Sampling can be performed by using a syringe to draw up the fermentation granular sludge.

[0026] The venting component enters the upper part of the fermentation bottle through a 2-4 mm vent pipe 7 and a sealing rubber stopper 2, without entering the fermentation broth. A manual ball valve 4 and a check valve 6 are installed on the vent pipe 7. The vent pipe 7 is connected to a 500-2000 mL gas collection bag 8. During feeding, the gas collection bag 8 is emptied and the manual ball valve 4 on the vent pipe 7 is opened; during sampling, the gas collection bag 8 is filled with nitrogen and the manual ball valve 4 on the vent pipe 7 is opened.

[0027] The mixing device consists of a magnetic stirrer 9 and a stirring rotor 10. When taking samples, the fermentation bottle is placed on the mixing device to ensure uniform sampling.

[0028] The process of this small-scale test device for studying the anaerobic fermentation of granular sludge is as follows:

[0029] Add 200-250ml of granular sludge (as fermentation broth) and a stirring rotor 10 to the fermentation flask. After installing the sealing rubber stopper 2, open the manual ball valves 4 of the feed pipe 3 and the exhaust pipe 7. Pour an appropriate amount of nitrogen gas through the feed pipe 3 to remove oxygen from the flask and ensure an anaerobic environment for microbial fermentation. Close the manual ball valve 4 of the feed pipe 3, connect the exhaust pipe 7 to the gas collection bag 8, and place the fermentation flask in a constant temperature incubator for fermentation.

[0030] Place the fermentation flask on the magnetic stirrer 9 and stir evenly. Remove the gas collection bag 8, open the manual ball valve 4 of the feed pipe 3 to purge nitrogen at a rate of 2-3 L / min, stir evenly, open the manual ball valve 4 to connect the syringe to the sampling tube 5, and quickly draw a quantitative volume. Close the manual ball valve 4 to complete the sampling.

[0031] After sampling, additional granular sludge needs to be added to maintain balance. Load the granular sludge to be fermented into the syringe and connect it to feed tube 3. Open manual ball valve 4 and slowly push the sludge in, ensuring it completely flows into the fermenter. Then close manual ball valve 4. Connect feed tube 3 to nitrogen gas and aerate for 5 minutes, then close manual ball valve 4. Connect exhaust pipe 7 to gas collection bag 8 and open manual ball valve 4 to complete the sample injection. Place the fermentation flask in a constant temperature incubator to continue fermentation.

[0032] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A pilot-scale device for research on anaerobic fermentation of granular sludge, characterized in that, The pilot-scale device includes a fermentation bottle, a granular sludge feeding component, a granular sludge sampling component, an exhaust component, and a mixing device; the fermentation bottle includes a fermentation bottle body (1) and a sealing rubber stopper (2) set on the fermentation bottle body (1); the granular sludge feeding component includes a feeding pipe (3) that passes through the sealing rubber stopper (2), and a manual ball valve (4) is set on the feeding pipe (3); the granular sludge sampling component includes a sampling pipe (5) that passes through the sealing rubber stopper (2), and a manual ball valve (4) and a check valve (6) are set on the sampling pipe (5); the exhaust component includes an exhaust pipe (7) that passes through the sealing rubber stopper (2), and a manual ball valve (4) is set on the exhaust pipe (7), and a gas collection bag (8) is set at the upper end of the exhaust pipe (7).

2. A pilot-scale device for anaerobic fermentation research of granular sludge according to claim 1, characterized in that, The fermentation bottle body (1) is 250-1000 mL, and the inside of the fermentation bottle body (1) is used to carry the granular sludge fermentation liquid.

3. A pilot-scale device for anaerobic fermentation research of granular sludge according to claim 2, characterized in that, The feed pipe (3) has a diameter of 3-6 mm and enters the bottom of the fermentation liquid through the sealing rubber plug (2). A manual ball valve (4) is installed on the feed pipe (3), and the feed can be injected with granular sludge using a syringe.

4. A pilot-scale device for anaerobic fermentation research of granular sludge according to claim 2, characterized in that, The sampling tube (5) has a diameter of 3-6 mm and enters the bottom of the fermentation liquid through a sealing rubber stopper (2). The sampling tube (5) is equipped with a manual ball valve (4) and a check valve (6). Sampling can be done by using a syringe to draw up fermentation granular sludge.

5. A pilot-scale device for anaerobic fermentation research of granular sludge according to claim 2, characterized in that, The exhaust pipe (7) has a diameter of 2-4 mm and enters the upper part of the fermentation bottle through the sealing rubber stopper (2), without entering the fermentation liquid. A manual ball valve (4) and a check valve (6) are installed on the exhaust pipe (7).

6. A pilot-scale device for anaerobic fermentation research of granular sludge according to claim 5, characterized in that, The exhaust pipe (7) is connected to a 500-2000 mL gas collection bag (8); when feeding, the gas collection bag (8) is emptied and the manual ball valve (4) on the exhaust pipe (7) is opened; when sampling, the gas collection bag (8) is filled with nitrogen and the manual ball valve (4) on the exhaust pipe (7) is opened.

7. A pilot-scale device for anaerobic fermentation research of granular sludge according to claim 1, characterized in that, The mixing device consists of a magnetic stirrer (9) and a stirring rotor (10). The stirring rotor (10) is placed inside the fermentation bottle. When taking samples, the main body of the fermentation bottle (1) is placed on the mixing device to ensure uniform sampling.

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