Anaerobic ammonia oxidation low-temperature compensation system with added vitamin C

Abstract

This utility model provides a low-temperature compensation system for enhanced anaerobic ammonia oxidation with vitamin C dosing, relating to the field of wastewater treatment technology. It includes a reaction tank, a heating module, a vitamin C storage tank, a pump, and a temperature sensor. The heating module is located in the reaction tank, the pump is connected to the vitamin C storage tank, and the temperature sensor is electrically connected to the pump. The heating module comprises several plate heat exchange modules and supporting columns, with clamping structures installed on the plate heat exchange modules. By implementing the vitamin C dosing system, the activity of low-temperature anaerobic ammonia oxidizing bacteria is maintained, simultaneously eliminating nitrite inhibition and achieving energy-saving effects. The clamping structures facilitate the installation and disassembly of the plate heat exchange modules, improving installation and subsequent maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a low-temperature compensation system for anaerobic ammonia oxidation enhanced by adding vitamin C. Background Technology

[0002] Traditional anaerobic ammonia oxidation processes face the following technical bottlenecks in low-temperature environments: 1. Inhibition of microbial activity: At temperatures below 20℃, the metabolic rate of anaerobic ammonia oxidizing bacteria (Anammox) decreases by more than 50%, leading to a sharp drop in denitrification efficiency; 2. Extended start-up period: The system start-up time exceeds 120 days at 15℃ (compared to 60 days at room temperature); 3. Nitrite accumulation: Low temperatures cause an imbalance in the activity of nitrite oxidizing bacteria (NOB), resulting in toxic inhibition with NO2⁻-N concentrations >15 mg / L.

[0003] To address the aforementioned problems caused by low-temperature environments, existing technologies generally employ heating and insulation methods. However, due to the high required heating temperature (generally 20°C or above), energy consumption is high. Furthermore, the heating module requires cleaning and maintenance after a period of use. Commonly used heating modules are typically heating coils, which suffer from low installation and maintenance efficiency and are difficult to adjust quickly according to changing needs. In response to these shortcomings, this application is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a vitamin C-enhanced anaerobic ammonia oxidation low-temperature compensation system. Specifically, it relates to a bioreactor system that maintains the activity and denitrification efficiency of anaerobic ammonia oxidizing bacteria under low-temperature conditions (10-20℃) by adding vitamin C (ascorbic acid), and improves the heating module to enhance the ease of installation and maintenance.

[0005] To address the aforementioned problems, this utility model provides a vitamin C-enhanced anaerobic ammonia oxidation low-temperature compensation system, comprising a reaction tank, a heating module, a vitamin C storage tank, a pump body, and a temperature sensor. The heating module is disposed in the reaction tank, and the pump body is connected to the vitamin C storage tank for dispensing vitamin C into the reaction tank. The temperature sensor is used to detect the temperature inside the reaction tank and is electrically connected to the pump body. The heating module includes several plate heat exchange modules and a support column. The plate heat exchange modules are equipped with clamping structures and are mounted on the support column via the clamping structures.

[0006] According to one embodiment of the present invention, the plate heat exchange module includes a main plate and heat exchange tubes disposed on the main plate. The clamping structure includes a mating plate, and the mating plate and the main plate can be connected by a connector, forming a clamping hole between the mating plate and the main plate after connection.

[0007] According to one embodiment of the present invention, two sets of mating plates are provided, which are respectively used to connect to both ends of the main body plate.

[0008] According to one embodiment of the present invention, a heating pipe is provided in the supporting column, and the plate heat exchange module is connected to the heating pipe through an intermediate pipe.

[0009] According to one embodiment of the present invention, the intermediate pipe is at least partially a flexible tube.

[0010] According to one embodiment of the present invention, a plurality of the plate heat exchange modules are arranged along the height direction of the reaction tank.

[0011] According to one embodiment of the present invention, the heat exchange tube is arranged in an arch shape.

[0012] According to one embodiment of the present invention, the vitamin C-enhanced anaerobic ammonia oxidation low-temperature compensation system further includes an ORP monitoring module, which is electrically connected to the pump body.

[0013] The beneficial effects of this utility model are that, by setting up a vitamin C dosing system, the activity of low-temperature anaerobic ammonia oxidizing bacteria is maintained, and nitrite inhibition is eliminated simultaneously. The anaerobic ammonia oxidation process can be carried out efficiently without heating the wastewater to a high temperature, thus achieving energy-saving effects. The clamp structure makes the installation and disassembly of the plate heat exchange module more convenient, improving the efficiency of installation and subsequent maintenance. Moreover, the number of plate heat exchange modules installed can be easily adjusted according to heat exchange requirements. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 A schematic diagram of the overall structure of the low-temperature compensation system for vitamin C-enhanced anaerobic ammonia oxidation;

[0016] Figure 2 A schematic diagram of a plate heat exchange module with a clamping structure on one side;

[0017] Figure 3 A schematic diagram of a plate heat exchange module with clamping structures on both sides;

[0018] Figure 4 This is a schematic diagram showing the connection between the plate heat exchange module and the supporting column. Detailed Implementation

[0019] The following description is only intended to disclose the present invention so that those skilled in the art can implement it. The embodiments in the following description are merely examples, and those skilled in the art will conceive of other obvious modifications. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other solutions that do not depart from the spirit and scope of the present invention.

[0020] Example 1:

[0021] Adding vitamin C to enhance the anaerobic ammonia oxidation low-temperature compensation system, such as... Figure 1 It includes a reaction tank 1, a heating module, a vitamin C storage tank 3, a pump body 4, and a temperature sensor 6.

[0022] Pump body 4 is connected to vitamin C storage tank 3 and is used to add vitamin C to reaction tank 1. In this embodiment, pump body 4 is a variable frequency metering pump, and a PLC programmable controller is set as the control system. A flow meter 5 and a temperature sensor 6 are set and connected to the control system. The flow meter 5 is used to collect the amount of vitamin C added, and the temperature sensor 6 is used to detect the temperature in reaction tank 1. The amount of vitamin C added is negatively correlated with the temperature. The control system controls the pump body 4 to add vitamin C according to the temperature parameters. For example, at 15°C, it is 25 mg / L, and it increases by 3 mg / L for every 1°C drop, so as to reduce the accumulation of nitrite and avoid sludge disintegration.

[0023] The heating module includes several plate heat exchange modules 2 and supporting columns 9. The heating module is set in the reaction tank 1. The supporting columns 9 can be arranged horizontally or vertically, and the corresponding plate heat exchange modules 2 can be distributed horizontally or vertically.

[0024] The plate heat exchange module 2 is equipped with a clamping structure, and the plate heat exchange module 2 is mounted on the support column 9 through the clamping structure. Figure 2 The plate heat exchange module 2 includes a main plate 21 and a plurality of heat exchange tubes 26 disposed on the main plate 21. There is a gap between adjacent heat exchange tubes. In this embodiment, the heat exchange tubes 26 are preferably arched, that is, the middle is higher than the sides, to reduce the deposition of impurities on the heat exchange tubes 26 and reduce the impact on the heat exchange effect during long-term use. In other embodiments, the heat exchange tubes 26 can be configured as a planar structure. The clamping structure includes a mating plate 24. The mating plate 24 and the main plate 21 can be connected by a connector 27. The connector 27 is preferably a bolt assembly. A plurality of bolt holes are provided on both the mating plate 24 and the main plate 21. After connection, the mating plate 24 and the main plate 21 form a clamping hole 25 that can clamp the support column 9. The inner wall of the clamping hole 25 can be made of rubber material to achieve a better clamping effect through deformation. An annular groove can also be provided on the support column 9 for mating with the clamping structure.

[0025] Ideally, two sets of clamping holes 25 should be provided, and correspondingly, two sets should also be provided on the supporting column 9 to achieve a stable connection.

[0026] In other embodiments, such as Figure 3 Optionally, two sets of mating plates 24 are provided, which are used to connect to both ends of the main body plate 21.

[0027] The clamp structure makes the installation and disassembly of the plate heat exchange module 2 more convenient, improving the efficiency of installation and subsequent maintenance, and allowing the number of plate heat exchange modules 2 to be installed to be easily adjusted according to heat exchange requirements.

[0028] The main plate 21 is provided with a heating medium inlet 22 and a heating medium outlet 23 connected to the heat exchange tube 26. Each of the two support columns 9 is provided with a heating pipe 11, which is used to connect to the heating medium inlet 22 and the heating medium outlet 23 respectively. The heating pipe 11 is connected to an external heating device, such as an electric heating device or a boiler. The heating device heats the medium, such as water, and it enters the heat exchange tube 26 through the heating pipe 11 to exchange heat with the sewage in the reaction tank. When the sewage temperature is lower than the set value, the heating module plays a role in heating or keeping the sewage constant, generally heating it to 10~20℃, which can be adjusted according to the needs to ensure the normal and efficient operation of the anaerobic ammonia oxidation process.

[0029] The heating pipe 11 has several interfaces, and valves are installed at the interfaces. The plate heat exchange module 2 is connected to the heating pipe 11 through an intermediate pipe 12. The intermediate pipe 12 is at least partially made of flexible tubing, which allows for easy adjustment of the installation position of the plate heat exchange module 2 and reduces installation difficulty.

[0030] Example 2:

[0031] Based on Example 1, in this example, an ORP monitoring module 7 is added. The ORP monitoring module 7 adopts an online ORP monitor and is electrically connected to the control system. It is used to detect the ORP index in the reaction tank 1. When ORP < -150mV, incremental addition is triggered. Preferably, the ORP value in the reaction zone is stabilized at -220~-180mV.

[0032] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations and modifications.

Claims

1. A low-temperature compensation system for an anaerobic ammonia oxidation process, characterized in that: The system includes a reaction tank (1), a heating module, a vitamin C storage tank (3), a pump body (4), and a temperature sensor (6). The heating module is located in the reaction tank (1). The pump body (4) is connected to the vitamin C storage tank (3) and is used to add vitamin C to the reaction tank (1). The temperature sensor (6) is used to detect the temperature inside the reaction tank (1). The temperature sensor (6) is electrically connected to the pump body (4). The heating module includes several plate heat exchange modules (2) and a support column (9). The plate heat exchange modules (2) are provided with a clamping structure. The plate heat exchange modules (2) are installed on the support column (9) through the clamping structure.

2. The vitamin C-enhanced anaerobic ammonium oxidation low-temperature compensation system according to claim 1, characterized in that: The plate heat exchange module (2) includes a main plate (21) and heat exchange tubes (26) disposed on the main plate (21). The clamping structure includes a mating plate (24). The mating plate (24) and the main plate (21) can be connected by a connector (27). After connection, the mating plate (24) and the main plate (21) form a clamping hole (25).

3. The vitamin C-enhanced anaerobic ammonium oxidation low-temperature compensation system according to claim 2, characterized in that: The mating plate (24) is provided in two sets, which are respectively used to connect to the two ends of the main plate (21).

4. The vitamin C-fortified anaerobic ammonium oxidation low-temperature compensation system according to any one of claims 1-3, characterized in that: The supporting column (9) is provided with a heating pipe (11), and the plate heat exchange module (2) is connected to the heating pipe (11) through an intermediate pipe (12).

5. The vitamin C-enhanced anaerobic ammonium oxidation low-temperature compensation system according to claim 4, characterized in that: The intermediate conduit (12) is at least partially a flexible tube.

6. The vitamin C-enhanced anaerobic ammonium oxidation low-temperature compensation system according to claim 1, characterized in that: Several of the plate heat exchange modules (2) are arranged along the height direction of the reaction tank (1).

7. The vitamin C-enhanced anaerobic ammonium oxidation low-temperature compensation system according to claim 2, characterized in that: The heat exchange tube (26) is arched.

8. The vitamin C-enhanced anaerobic ammonia oxidation low-temperature compensation system according to claim 1, characterized in that: The vitamin C-enhanced anaerobic ammonia oxidation low-temperature compensation system also includes an ORP monitoring module (7), which is electrically connected to the pump body (4).

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