Sewage biotoxicity detection device and system

Abstract

The utility model relates to the technical field of sewage treatment and detection, and provides a sewage biotoxicity detection device and system.The device comprises a main body reaction unit, a water quality detection unit, an aeration stirring unit and a control unit, and the main body reaction unit comprises a main body reactor, a water inlet assembly and a sludge inlet assembly; a water inlet and a sludge inlet are formed in the outer wall of the main body reactor, the water inlet assembly discharges sewage to be detected to the main body reactor through the water inlet, and the sludge inlet assembly discharges activated sludge to the main body reactor through the sludge inlet; the aeration stirring unit is arranged in the main body reactor, the water quality detection unit extends into the main body reactor to detect sewage to be detected, and the control unit is connected with the water quality detection unit to obtain detection indexes; the control unit controls the working state of each functional unit based on the detection indexes. According to the device, the detection cost is reduced, and the device has certain adaptability to the impact load of sewage, so that the detection precision and the detection comprehensiveness of the biological toxicity of the sewage are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment and detection, in particular to a sewage biological toxicity detection device and system. Background Art

[0002] As the main bearer of the biological secondary treatment process of the sewage treatment plant, the biological activity of activated sludge is closely related to the effluent effect of the sewage treatment plant. In the daily operation process, once the influent is mixed with trace toxic and harmful substances, resulting in water quality fluctuations, it will damage the biological activity of the activated sludge, resulting in the effluent quality failing to meet the standards, and may even cause the biological treatment system to collapse, seriously affecting the normal operation of the sewage treatment plant. However, the evaluation of biological toxicity based on the effluent effect has a lag. Therefore, it is necessary to conduct online detection of the biological toxicity of sewage.

[0003] Most of the existing technologies for measuring biological toxicity rely on some model organisms, such as luminous bacteria. However, there are the following problems in using model organisms to measure biological toxicity: the model organisms have not been acclimated to daily incoming water, and may have a greater reaction to fluctuations in influent water quality within the normal range, causing operators to make wrong judgments and affecting the normal operation of the sewage plant. In addition, the living conditions of model organisms are relatively harsh, and their activity is maintained for a short time, making them difficult to apply to continuous biological toxicity monitoring of domestic sewage. At the same time, model organisms generally need to be purchased from outside, and after purchase, they need special culture media for resuscitation, which increases the economic cost of sewage plant operation. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned prior art, the utility model provides a sewage biological toxicity detection device and system, which solves the technical problems of low accuracy, great difficulty and high cost in sewage biological toxicity determination using model organisms in the prior art.

[0005] On one hand, the utility model provides a sewage biological toxicity detection device, comprising: a main reaction unit, a water quality detection unit, an aeration stirring unit and a control unit;

[0006] The main reaction unit comprises a main reactor, a water inlet assembly and a mud inlet assembly. The outer wall of the main reactor is provided with a water inlet and a mud inlet. The water inlet assembly is connected to the water inlet and is used to discharge the sewage to be tested into the main reactor. The mud inlet assembly is connected to the mud inlet and is used to discharge the activated sludge into the main reactor.

[0007] The aeration and stirring unit is arranged in the main reactor, one end of the water quality detection unit extends into the main reactor and contacts the sewage to be detected, and is used to detect the sewage to be detected, and the control unit is connected to the other end of the water quality detection unit, and is used to obtain multiple detection indicators of the sewage to be detected;

[0008] The control unit is also connected to the main reaction unit, the water quality detection unit and the aeration and stirring unit respectively, and the control unit controls the working states of the reaction unit, the water quality detection unit and the aeration and stirring unit based on multiple detection indicators of the sewage to be detected.

[0009] Optionally, the water inlet assembly includes a water inlet pump, a water inlet valve and a water inlet pipeline;

[0010] The water inlet pump and the water inlet valve are sequentially arranged along the inlet end of the water inlet pipeline to the outlet end of the water inlet pipeline, and the outlet end of the water inlet pipeline is connected to the water inlet of the main reactor, wherein the height of the water inlet in the vertical direction of the main reactor is higher than the liquid level of the sewage to be detected in the main reactor;

[0011] The water inlet valve is connected to the control unit.

[0012] Optionally, the mud inlet assembly includes a mud inlet pump, a mud inlet valve and a mud inlet pipeline;

[0013] The mud inlet pump and the mud inlet valve are sequentially arranged along the inlet end of the mud inlet pipeline to the outlet end of the mud inlet pipeline, and the outlet end of the mud inlet pipeline is connected to the mud inlet of the main reactor, wherein the height of the mud inlet in the vertical direction of the main reactor is higher than the liquid level of the sewage to be detected in the main reactor;

[0014] The mud inlet valve is connected to the control unit.

[0015] Optionally, the device further comprises an emptying assembly;

[0016] The emptying assembly includes an emptying pipeline and an emptying valve. An emptying port is provided at the bottom of the main reactor. The emptying pipeline is connected to the emptying port. The emptying valve is arranged on the emptying pipeline and connected to the control unit.

[0017] Optionally, the water inlet and the mud inlet are at the same height in the vertical direction of the outer wall of the main reactor;

[0018] An overflow port is also provided on the outer wall of the main reactor, and the height of the overflow port in the vertical direction of the main reactor is higher than the liquid level of the sewage to be detected in the main reactor, and lower than the heights of the water inlet and the sewage inlet.

[0019] Optionally, the water quality detection unit includes a plurality of detection probes;

[0020] The multiple detection probes are evenly distributed along the circumference in the main reactor;

[0021] One end of the plurality of detection probes is threadedly connected to the top of the main reactor, and the other end of the plurality of detection probes extends below the liquid surface of the sewage to be detected in the main reactor to detect the sewage to be detected;

[0022] The multiple detection probes are respectively connected to the control unit, and the multiple detection probes include a liquid level meter, a sludge concentration detector, an ORP meter, a pH meter and a dissolved oxygen meter.

[0023] Optionally, the aeration and stirring unit includes an aeration component and a stirrer;

[0024] The aeration assembly includes an aeration main pipe, an air pump, an air valve and an aeration branch pipe, wherein the aeration branch pipe is arranged at the bottom of the main reactor, and the aeration branch pipe includes a circular pipeline or a plurality of concentric circular pipelines;

[0025] The inlet end of the aeration main pipe is arranged outside the main reactor, and the aeration main pipe extends from the outside of the main reactor into the main reactor and is connected with the aeration branch pipe;

[0026] The air pump and the air valve are sequentially arranged at the inlet end of the aeration main pipe along the length direction of the pipe, and the air valve is connected to the control unit;

[0027] The agitator is arranged in the main reactor and is arranged opposite to the aeration branch pipe in the vertical direction. The agitator is connected to the control unit.

[0028] On the other hand, the utility model provides a sewage biological toxicity detection system, which specifically includes a coarse and fine grid, a primary sedimentation tank, a biochemical tank, a secondary sedimentation tank, and a sewage biological toxicity detection device as described in any one of the above items;

[0029] The inlet of the coarse and fine grid is the total water inlet of the sewage, the outlet of the coarse and fine grid is connected to the inlet of the sewage biological toxicity detection device, the outlet of the sewage biological toxicity detection device is connected to the inlet of the primary sedimentation tank, the outlet of the primary sedimentation tank is connected to the inlet of the biochemical tank, the outlet of the biochemical tank is connected to the inlet of the secondary sedimentation tank, and the outlet of the secondary sedimentation tank is used to discharge the sewage for deep treatment;

[0030] The sewage biological toxicity detection device is used to perform biological toxicity detection on the sewage discharged from the coarse and fine grids. When the sewage biological toxicity detection device detects that the biological toxicity of the sewage is abnormal, the sewage is controlled to stop being discharged into the primary sedimentation tank.

[0031] Optionally, the water inlet cycle of the sewage biological toxicity detection device is consistent with the water inlet cycle of the biochemical pool;

[0032] The sludge age of the activated sludge in the sewage biological toxicity detection device is consistent with the sludge age in the biochemical pool.

[0033] The sewage biological toxicity detection device and system provided by the utility model discharges both the sewage to be detected and the activated sludge into the main reactor, uses the activated sludge to detect the biological toxicity of the sewage in real time, effectively avoids the extra cost generated when using model organisms for biological toxicity detection, and has a certain adaptability to the impact load of the sewage to be detected; the water quality detection unit is directly extended into the main reactor to contact the sewage to be detected, so that the sewage can be detected in real time and comprehensively, and water quality abnormalities and toxicity changes can be discovered in time, which is helpful to comprehensively and accurately evaluate the biological toxicity and water quality of the sewage; an aeration stirring unit is arranged in the main reactor, which can improve the activity of microorganisms, maintain the stability of the microbial community, and maintain the same aeration process as the subsequent sewage treatment process; the control unit is used to obtain the detection results and control the working state of each functional unit in the device based on the detection results, so as to realize the automatic control and effective operation of the device. The above device reduces the detection cost, has a certain adaptability to the impact load of sewage, and effectively improves the detection accuracy and comprehensiveness of the biological toxicity of sewage.

[0034] Other features and advantages of the utility model will be described in the subsequent description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures specifically pointed out in the written description, claims, and drawings.

[0035] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0037] Figure 1 A schematic diagram of the structure of a sewage biological toxicity detection device in an embodiment provided in the present application;

[0038] Figure 2A top view of a sewage biological toxicity detection device in one embodiment provided in the present application;

[0039] Figure 3 A schematic diagram of the structure of a sewage biological toxicity detection system in an embodiment provided in the present application.

[0040] In the figure:

[0041] 1. Main reactor; 2. Water inlet; 3. Water inlet pipeline; 4. Water inlet pump; 5. Water inlet valve; 6. Mud inlet; 7. Mud inlet pipeline; 8. Mud inlet pump; 9. Mud inlet valve; 10. Drain port; 11. Drain valve; 12. Drain pipeline; 13. Overflow port; 14. Detection probe; 15. Aeration main pipe; 16. Air pump; 17. Air valve; 18. Aeration branch pipe; 19. Agitator; 20. PLC controller. DETAILED DESCRIPTION

[0042] 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.

[0043] 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 utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The utility model provides a sewage biological toxicity detection device on the one hand. Figure 1As shown, it includes: a main reaction unit, a water quality detection unit, an aeration and stirring unit and a control unit, wherein the main reaction unit includes a main reactor 1, a water inlet component and a mud inlet component, the outer wall of the main reactor 1 is provided with a water inlet 2 and a mud inlet 6, the water inlet component is connected to the water inlet 2, and is used to discharge the sewage to be detected into the main reactor 1, and the mud inlet component is connected to the mud inlet 6, and is used to discharge the activated sludge into the main reactor 1; the aeration and stirring unit is arranged in the main reactor 1, one end of the water quality detection unit extends into the main reactor 1 and contacts with the sewage to be detected, and is used to detect the sewage to be detected, and the control unit is connected to the other end of the water quality detection unit, and is used to obtain multiple detection indicators of the sewage to be detected; the control unit is also respectively connected to the main reaction unit, the water quality detection unit and the aeration and stirring unit, and the control unit controls the working states of the reaction unit, the water quality detection unit and the aeration and stirring unit based on the multiple detection indicators of the sewage to be detected.

[0046] The sewage biological toxicity detection device provided by the utility model discharges both the sewage to be detected and the activated sludge into the main reactor 1, uses the activated sludge to detect the biological toxicity of the sewage in real time, effectively avoids the extra cost generated when using model organisms for biological toxicity detection, and has a certain adaptability to the impact load of the sewage to be detected; the water quality detection unit is directly extended into the main reactor 1 to contact the sewage to be detected, so that the sewage can be detected in real time and comprehensively, and water quality abnormalities and toxicity changes can be discovered in time, which is helpful to comprehensively and accurately evaluate the biological toxicity and water quality of the sewage; an aeration stirring unit is provided in the main reactor 1, which can improve the activity of microorganisms, maintain the stability of the microbial community, and maintain the same aeration process as the subsequent sewage treatment process; the control unit is used to obtain the detection results and control the working state of each functional unit in the device based on the detection results, so as to realize the automatic control and effective operation of the device. The above device reduces the detection cost, has a certain adaptability to the impact load of sewage, and effectively improves the detection accuracy and comprehensiveness of the biological toxicity of sewage.

[0047] Among them, the control unit specifically selects a PLC controller 20, which can automatically control the operation and operation of various components in the device according to preset programs and logical conditions. It has a high degree of programmability and flexibility, and can be customized in programming and control as needed. Through the PLC controller 20, the sewage biological toxicity detection device can realize automatic operation and monitoring, improve the stability and efficiency of the device, reduce the need for manual operation, thereby reducing operating costs and improving overall management efficiency.

[0048] Specifically, in the above embodiment, Figure 1 and Figure 2As shown, the water inlet assembly includes a water inlet pump 4, a water inlet valve 5 and a water inlet pipeline 3; the water inlet pump 4 and the water inlet valve 5 are sequentially arranged along the inlet end of the water inlet pipeline 3 to the outlet end of the water inlet pipeline 3, and the outlet end of the water inlet pipeline 3 is connected to the water inlet 2 of the main reactor 1, wherein the height of the water inlet 2 in the vertical direction of the main reactor 1 is higher than the liquid level height of the sewage to be detected in the main reactor 1; the water inlet valve 5 is connected to the control unit.

[0049] In this embodiment, an inlet pump 4 and an inlet valve 5 are provided on the water inlet pipeline 3. The water inlet amount of the sewage to be detected is accurately controlled by controlling the opening and closing states of the inlet pump 4 and the inlet valve 5, ensuring that the water amount of the sewage to be detected in the main reactor 1 is maintained within an appropriate range, which helps to ensure the accuracy and repeatability of the detection; in some special cases, by closing the inlet valve 5, it is possible to prevent the sewage from flowing back during the detection process, avoid cross contamination or adverse effects on the device, and ensure the accuracy and reliability of the detection; and by controlling the working state of the inlet pump 4, the water inlet rate can be adjusted to adapt to the detection requirements under different conditions, thereby improving the applicability and flexibility of the device; at the same time, the height of the water inlet 2 in the vertical direction of the main reactor 1 is higher than the liquid level of the sewage to be detected, preventing the sewage from flowing back from the water inlet 2.

[0050] Specifically, in the above embodiment, Figure 2 As shown, the mud inlet assembly includes a mud inlet pump 8, a mud inlet valve 9 and a mud inlet pipeline 7; the mud inlet pump 8 and the mud inlet valve 9 are sequentially arranged along the inlet end of the mud inlet pipeline 7 to the outlet end of the mud inlet pipeline 7, and the outlet end of the mud inlet pipeline 7 is connected to the mud inlet 6 of the main reactor 1, wherein the height of the mud inlet 6 in the vertical direction of the main reactor 1 is higher than the liquid level of the sewage to be detected in the main reactor 1; the mud inlet valve 9 is connected to the control unit.

[0051] In this embodiment, the setting of the mud inlet assembly is similar to that of the water inlet assembly, and the activated sludge is discharged into the main reactor 1 through the mud inlet pipeline 7. The mud inlet pump 8 and the mud inlet valve 9 on the mud inlet pipeline 7 play a role in accurately controlling the discharge amount of the activated sludge. The present application uses activated sludge to detect the biological toxicity of sewage. Activated sludge is a common mixture in the wastewater treatment process, which contains rich microbial communities. The microbial communities feed on organic matter and convert organic pollutants into relatively stable and harmless substances through biodegradation and redox reactions. Therefore, compared with the use of model organisms for sewage biological toxicity detection, it can improve the accuracy of detection while reducing the detection cost.

[0052] Specifically, in the above embodiment, the device also includes an emptying component; the emptying component includes an emptying pipeline 12 and an emptying valve 11, an emptying port 10 is opened at the bottom of the main reactor 1, the emptying pipeline 12 is connected to the emptying port 10, the emptying valve 11 is arranged on the emptying pipeline 12, and the emptying valve 11 is connected to the control unit.

[0053] In this embodiment, the emptying operation is accurately and flexibly controlled by controlling the opening and closing state of the drain valve 11, so that the liquid in the main reactor 1 can be emptied in time or according to the emptying demand, so as to perform maintenance, cleaning or other operations on the device; closing the drain valve 11 when necessary can prevent sewage from leaking into the surrounding environment at inappropriate times, avoid environmental pollution, and help ensure the environmental friendliness and safety of the sewage treatment process; timely emptying operation can reduce the liquid level in the main reactor 1, help to reduce the pressure on the structure and equipment of the main reactor 1, extend its service life, and reduce the frequency of maintenance and repair.

[0054] Specifically, in the above embodiment, Figure 2 As shown, the water inlet 2 and the mud inlet 6 are at the same height in the vertical direction of the outer wall of the main reactor 1; an overflow port 13 is also provided on the outer wall of the main reactor 1, and the height of the overflow port 13 in the vertical direction of the main reactor 1 is higher than the liquid level of the sewage to be detected in the main reactor 1, and is lower than the heights of the water inlet 2 and the sewage inlet.

[0055] In this embodiment, when there is an abnormal condition during the operation of the device, the liquid level in the main reactor 1 exceeds a certain height, and the excess sewage can be discharged through the overflow port 13, thereby effectively controlling the liquid level height in the main reactor 1, avoiding the adverse effect of excessive liquid level on the normal operation of the device, and ensuring that the liquid level in the main reactor 1 is always maintained within an appropriate range; the water inlet 2 and the mud inlet 6 are set at the same height position, and when the liquid level in the main reactor 1 is under similar pressure and liquid level conditions, the normal water inlet and mud inlet functions of the water inlet component and the mud inlet component are maintained, which is conducive to the stable operation of the device. At the same time, by unifying the height of the water inlet 2 and the mud inlet 6 and setting the overflow port 13 on the outer wall, the design and operation of the device are simplified, the complexity of the treatment process is reduced, and the operability and maintainability of the device are improved; the present application can avoid overflow or excessive pressure caused by excessive liquid level in the main reactor 1 by reasonably setting the heights of the water inlet 2, the mud inlet 6 and the overflow port 13, thereby improving the safety of the device and reducing potential risks.

[0056] Specifically, combined Figure 1 and Figure 2As shown, a water inlet 2 and a mud inlet 6 are opened at a height of 1 / 3 to 1 / 4 from the top of the main reactor 1, the water inlet 2 and the mud inlet 6 are located on the same circumference of the main reactor 1, and the angle between the water inlet 2 and the mud inlet 6 on the same circumference is 30° to 45°, and an overflow port 13 is opened at a height of 1 / 2 to 1 / 3 from the top of the main reactor 1.

[0057] Specifically, in the above embodiment, Figure 1 and Figure 2 As shown, the water quality detection unit includes a plurality of detection probes 14; the plurality of detection probes 14 are evenly distributed along the circumference in the main reactor 1; one end of the plurality of detection probes 14 is threadedly connected to the top of the main reactor 1, and the other end of the plurality of detection probes 14 extends below the liquid surface of the sewage to be detected in the main reactor 1 to detect the sewage to be detected; the plurality of detection probes 14 are respectively connected to the control unit, and the plurality of detection probes 14 include a liquid level meter, a sludge concentration detector, an ORP meter, a pH meter and a dissolved oxygen meter.

[0058] In this embodiment, one end of multiple detection probes 14 is inserted into the sewage to be tested for detection, and the other end is stably fixed on the top of the main reactor 1 through a threaded connection. Multiple detection probes 14 are evenly distributed along the circumference of the main reactor 1 to ensure that there are corresponding monitoring points in each area within the main reactor 1, so that the water quality changes in different areas inside the main reactor 1 can be fully obtained, and the spatial resolution of the detection can be improved. There are many types of detection probes 14, and the detection results cover different water quality parameters, including the liquid level, sludge concentration, oxidation-reduction potential (ORP), pH and dissolved oxygen of the sewage to be tested, so that the water quality detection unit can comprehensively monitor various key parameters in the sewage treatment process, provide comprehensive water quality information, cover the detection needs of multiple water quality parameters, and is suitable for different types of sewage treatment processes and environments.

[0059] Specifically, in the above embodiment, Figure 1 As shown, the aeration and stirring unit includes an aeration component and an agitator 19; the aeration component includes an aeration main pipe 15, an air pump 16, an air valve 17 and an aeration branch pipe 18, the aeration branch pipe 18 is arranged at the bottom of the main reactor 1, and the aeration branch pipe 18 includes a circular pipeline or a plurality of concentric circular pipelines; the inlet end of the aeration main pipe 15 is arranged outside the main reactor 1, and the aeration main pipe 15 extends into the main reactor 1 from the outside of the main reactor 1 and is connected to the aeration branch pipe 18; the air pump 16 and the air valve 17 are sequentially arranged at the inlet end of the aeration main pipe 15 along the length direction of the pipeline, and the air valve 17 is connected to the control unit; the agitator 19 is arranged in the main reactor 1, and is arranged opposite to the aeration branch pipe 18 in the vertical direction, and the agitator 19 is connected to the control unit.

[0060] In this embodiment, an aeration component is provided to increase the dissolved oxygen in the sewage and mix the gas and liquid, and to maintain the same or similar aeration process as in the subsequent biochemical pool. The agitator 19 is used to fully mix the microorganisms and pollutants under anoxic and anaerobic conditions. The aeration branch pipe 18 is designed as a circular pipe or a plurality of concentric circular pipes, which is conducive to the uniform distribution of gas in the sewage, ensuring that the gas can fully contact the microorganisms and organic matter in the sewage during the aeration process, thereby improving the aeration effect. An air pump 16 and an air valve 17 are provided at the inlet end of the aeration main pipe 15, and combined with the adjustment of the control unit, the air pump 16 and the air valve 17 are precisely controlled, and then the intensity and time of aeration are adjusted as needed, thereby improving the flexibility and applicability of the device.

[0061] On the other hand, the utility model provides a sewage biological toxicity detection system, comprising a coarse and fine grid, a primary sedimentation tank, a biochemical tank, a secondary sedimentation tank and any of the above-mentioned sewage biological toxicity detection devices, wherein the inlet of the coarse and fine grid is the total water inlet 2 of the sewage, the outlet of the coarse and fine grid is connected with the inlet of the sewage biological toxicity detection device, the outlet of the sewage biological toxicity detection device is connected with the inlet of the primary sedimentation tank, the outlet of the primary sedimentation tank is connected with the inlet of the biochemical tank, the outlet of the biochemical tank is connected with the inlet of the secondary sedimentation tank, and the outlet of the secondary sedimentation tank is used to discharge the sewage for deep treatment; the sewage biological toxicity detection device is used to perform biological toxicity detection on the sewage discharged from the coarse and fine grid, and when the sewage biological toxicity detection device detects that the biological toxicity of the sewage is abnormal, the sewage is controlled to stop being discharged into the primary sedimentation tank.

[0062] The sewage biological toxicity detection system provided by the utility model is as follows: Figure 3 As shown, on the basis of the existing sewage treatment system of coarse and fine screens, primary sedimentation tanks, biochemical tanks and secondary sedimentation tanks, a sewage biological toxicity detection device is introduced to form a complete sewage treatment system to realize real-time monitoring of biological toxicity in sewage. When the sewage biological toxicity detection device detects that the sewage toxicity is normal, the sewage will continue to be discharged normally, and when the sewage biological toxicity detection device detects that the sewage toxicity is abnormal, the discharge process is stopped. The sewage with abnormal toxicity needs to be treated in advance before it can continue to enter the primary sedimentation tank, biochemical tank, etc., to ensure the stability and safety of the discharged water quality and protect the health of the water environment.

[0063] Specifically, the sewage biological toxicity detection device can also be understood as a sewage toxicity detection device installed next to the original sewage treatment system. It only detects the toxicity of part of the sewage, and judges the toxicity of the entire sewage based on the toxicity detection results of part of the sewage, thereby controlling the overall discharge of sewage. The setting of the device is very flexible.

[0064] Specifically, in the above embodiment, the water inlet cycle of the sewage biological toxicity detection device is consistent with the water inlet cycle of the biochemical pool; the sludge age of the activated sludge of the sewage biological toxicity detection device is consistent with the sludge age in the biochemical pool.

[0065] In this embodiment, the water inlet cycle of the sewage biological toxicity detection device is synchronized with the water inlet cycle of the biochemical pool. Specifically, the hydraulic retention time in the device is 18 hours, including 1.5 hours in the anaerobic section, 2.5 hours in the anoxic section, and 14 hours in the aerobic section, to ensure that the sewage is fully treated and decomposed and improve the treatment efficiency; and the sludge age of the sludge in the device is consistent with the sludge age of the biochemical pool in the sewage treatment system, wherein the sludge age is specifically 15 days. Maintaining a consistent sludge age helps maintain the stability and operating efficiency of the system. This application is aimed at the setting of the water inlet cycle and sludge age of the sewage in the device, which can ensure the stability and coordination of the system.

[0066] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A sewage biological toxicity detection device, characterized in that: include: Main reaction unit, water quality detection unit, aeration and stirring unit and control unit; The main reaction unit comprises a main reactor (1), a water inlet assembly and a mud inlet assembly. The outer wall of the main reactor (1) is provided with a water inlet (2) and a mud inlet (6). The water inlet assembly is connected to the water inlet (2) and is used to discharge the sewage to be tested into the main reactor (1). The mud inlet assembly is connected to the mud inlet (6) and is used to discharge the activated sludge into the main reactor (1). The aeration and stirring unit is arranged in the main reactor (1), one end of the water quality detection unit extends into the main reactor (1) to contact the sewage to be detected, and is used to detect the sewage to be detected, and the control unit is connected to the other end of the water quality detection unit, and is used to obtain multiple detection indicators of the sewage to be detected; The control unit is also connected to the main reaction unit, the water quality detection unit and the aeration and stirring unit respectively, and the control unit controls the working states of the reaction unit, the water quality detection unit and the aeration and stirring unit based on multiple detection indicators of the sewage to be detected.

2. The sewage biological toxicity detection device according to claim 1, characterized in that: The water inlet assembly comprises a water inlet pump (4), a water inlet valve (5) and a water inlet pipeline (3); The water inlet pump (4) and the water inlet valve (5) are sequentially arranged along the inlet end of the water inlet pipeline (3) to the outlet end of the water inlet pipeline (3), and the outlet end of the water inlet pipeline (3) is connected to the water inlet (2) of the main reactor (1), wherein the height of the water inlet (2) in the vertical direction of the main reactor (1) is higher than the liquid level of the sewage to be detected in the main reactor (1); The water inlet valve (5) is connected to the control unit.

3. The sewage biological toxicity detection device according to claim 1, characterized in that: The mud inlet assembly comprises a mud inlet pump (8), a mud inlet valve (9) and a mud inlet pipeline (7); The mud inlet pump (8) and the mud inlet valve (9) are sequentially arranged along the inlet end of the mud inlet pipeline (7) to the outlet end of the mud inlet pipeline (7), and the outlet end of the mud inlet pipeline (7) is connected to the mud inlet (6) of the main reactor (1), wherein the height of the mud inlet (6) in the vertical direction of the main reactor (1) is higher than the liquid level of the sewage to be detected in the main reactor (1); The mud inlet valve (9) is connected to the control unit.

4. The sewage biological toxicity detection device according to claim 1, characterized in that: The device also includes an emptying assembly; The emptying assembly comprises an emptying pipeline (12) and an emptying valve (11); an emptying port (10) is provided at the bottom of the main reactor (1); the emptying pipeline (12) is connected to the emptying port (10); the emptying valve (11) is arranged on the emptying pipeline (12); and the emptying valve (11) is connected to the control unit.

5. The sewage biological toxicity detection device according to claim 1, characterized in that: The water inlet (2) and the mud inlet (6) are at the same height in the vertical direction of the outer wall of the main reactor (1); An overflow port (13) is also provided on the outer wall of the main reactor (1), and the height of the overflow port (13) in the vertical direction of the main reactor (1) is higher than the liquid level of the sewage to be detected in the main reactor (1), and lower than the heights of the water inlet (2) and the mud inlet (6).

6. The sewage biological toxicity detection device according to claim 1, characterized in that: The water quality detection unit comprises a plurality of detection probes (14); The plurality of detection probes (14) are evenly distributed along the circumference of the main reactor (1); One end of the plurality of detection probes (14) is threadedly connected to the top of the main reactor (1), and the other end of the plurality of detection probes (14) extends below the liquid surface of the sewage to be detected in the main reactor (1) to detect the sewage to be detected; The multiple detection probes (14) are respectively connected to the control unit, and the multiple detection probes (14) include a liquid level meter, a sludge concentration detector, an ORP meter, a pH meter and a dissolved oxygen meter.

7. The sewage biological toxicity detection device according to claim 1, characterized in that: The aeration and stirring unit comprises an aeration component and a stirrer (19); The aeration assembly comprises an aeration main pipe (15), an air pump (16), an air valve (17) and an aeration branch pipe (18), wherein the aeration branch pipe (18) is arranged at the bottom of the main reactor (1), and the aeration branch pipe (18) comprises a circular pipeline or a plurality of concentric circular pipelines; The inlet end of the aeration main pipe (15) is arranged outside the main reactor (1), and the aeration main pipe (15) extends from the outside of the main reactor (1) into the main reactor (1) and is connected to the aeration branch pipe (18); The air pump (16) and the air valve (17) are sequentially arranged at the inlet end of the aeration main pipe (15) along the length direction of the pipe, and the air valve (17) is connected to the control unit; The agitator (19) is arranged in the main reactor (1) and is arranged opposite to the aeration branch pipe (18) in the vertical direction. The agitator (19) is connected to the control unit.

8. A sewage biological toxicity detection system, characterized in that: include: A coarse-fine grid, a primary sedimentation tank, a biochemical tank, a secondary sedimentation tank, and a sewage biological toxicity detection device as claimed in any one of claims 1 to 7; The inlet of the coarse and fine grid is the total water inlet of the sewage, the outlet of the coarse and fine grid is connected to the inlet of the sewage biological toxicity detection device, the outlet of the sewage biological toxicity detection device is connected to the inlet of the primary sedimentation tank, the outlet of the primary sedimentation tank is connected to the inlet of the biochemical tank, the outlet of the biochemical tank is connected to the inlet of the secondary sedimentation tank, and the outlet of the secondary sedimentation tank is used to discharge the sewage for deep treatment; The sewage biological toxicity detection device is used to perform biological toxicity detection on the sewage discharged from the coarse and fine grids. When the sewage biological toxicity detection device detects that the biological toxicity of the sewage is abnormal, the sewage is controlled to stop being discharged into the primary sedimentation tank.

9. The sewage biological toxicity detection system according to claim 8, characterized in that: The water inlet cycle of the sewage biological toxicity detection device is consistent with the water inlet cycle of the biochemical pool; The sludge age of the activated sludge in the sewage biological toxicity detection device is consistent with the sludge age in the biochemical pool.

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