Online detection system for toxicity of inflow water of sewage plant

Abstract

The utility model provides an on-line detection system for toxicity of inflow water of a sewage plant, and relates to the technical field of sewage treatment. The device comprises a sludge circulating tank, a water taking device, a detection bottle, a clear water tank and a medicament tank, the sludge circulating tank is communicated with the biochemical pool so as to contain sludge conveyed from the biochemical pool; the water taking device is communicated with the sewage inlet pipe so as to contain sewage conveyed from the sewage inlet pipe; the detection bottle is provided with a sludge inlet connected with the output end of the sludge circulating tank and a sewage inlet connected with the output port of the water taking device; the detection bottle is further provided with a first connector used for being connected with a clear water tank and a medicament tank. An aeration disc used for being communicated with an external air supply device is further arranged in the detection bottle, a dissolved oxygen measuring instrument is inserted into the detection bottle, and a stirring unit is arranged in the detection bottle; the on-line detection system for the toxicity of the inlet water of the sewage plant can be used for accurately detecting the toxicity of the inlet water of the sewage plant.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater toxicity detection equipment, specifically to an online toxicity detection system for wastewater treatment plant influent. Background Technology

[0002] Currently, the activated sludge process is commonly used in wastewater treatment. It utilizes the metabolic activity of microorganisms in activated sludge to transform and degrade pollutants in wastewater. When toxic wastewater enters a wastewater treatment plant using the activated sludge process, it can inhibit and toxicize the microorganisms in the activated sludge, suppressing their biological activity, reducing their treatment efficiency, disrupting the normal operation of the wastewater treatment plant, and ultimately leading to substandard effluent quality. Toxic wastewater can even completely inactivate the microorganisms in the wastewater treatment plant.

[0003] Existing methods for detecting the toxicity of wastewater influent from wastewater treatment plants mainly include physicochemical analysis and biological analysis. Physicochemical analysis primarily involves the quantitative analysis of the main components of toxic pollutants, accurately determining the content of specific toxic substances. However, due to the diversity of toxic substances in water, it is difficult to quantitatively analyze all toxic components, let alone consider the inhibitory and synergistic effects between various toxic substances. Therefore, it can only quantitatively analyze the content of the main toxic components in toxic pollutants and cannot reflect the comprehensive environmental impact of various toxic components. Biological analysis, as a toxicity detection method, utilizes the reactions of organisms sensitive to environmental pollution or toxicity to evaluate environmental quality. Biological toxicity detection can rapidly reflect the comprehensive environmental impact of various toxic substances and is a rapid detection method for comprehensive environmental toxicity indicators.

[0004] Biotoxicity testing methods can be classified according to the different types of organisms used. These mainly include methods for detecting fish toxicity, flea toxicity, algae toxicity, luminescent bacteria toxicity, and activated sludge respiration rate. Since the activated sludge respiration rate testing method uses organisms specifically designed for wastewater treatment, the results provide more practical guidance for wastewater treatment process control, making it an ideal method for evaluating the toxicity of wastewater influent to wastewater treatment plants.

[0005] However, current online influent toxicity detection devices often use a fixed location to collect sludge for testing, which may affect the test results. Utility Model Content

[0006] To address this issue, this invention proposes an online toxicity detection system for wastewater treatment plants, which at least partially solves the technical problem that existing online toxicity detection devices for wastewater often use fixed locations for sludge collection, potentially affecting the detection results.

[0007] The technical solution of this utility model is as follows:

[0008] An online toxicity detection system for wastewater treatment plant influent includes a sludge circulation tank, a water sampler, a detection bottle, a clean water tank, and a reagent tank. The sludge circulation tank is connected to a biological treatment tank to hold sludge transported from the biological treatment tank. The water sampler is connected to a wastewater inlet pipe to hold wastewater transported from the wastewater inlet pipe. The detection bottle has a sludge inlet connected to the output end of the sludge circulation tank and a wastewater inlet connected to the output port of the water sampler. The detection bottle also has a first interface for connecting to the clean water tank and the reagent tank. The detection bottle also has an aeration disc for connecting to an external air supply device, a dissolved oxygen meter inserted inside the detection bottle, and a stirring unit inside the detection bottle.

[0009] It also includes a circulation pipeline and a first pump body. The two ends of the circulation pipeline are respectively connected to the biological treatment tank. The first pump body is used to form a flow path from the biological treatment tank into one end of the circulation pipeline and back to the biological treatment tank through the other end of the circulation pipeline. The sludge circulation tank is connected to the middle of the circulation pipeline.

[0010] Furthermore, the sludge circulation tank is provided with an inlet for communicating with the circulation pipeline, an overflow port for allowing sludge to overflow from the sludge circulation tank, a discharge port for discharging sludge from the sludge circulation tank, and an outlet for communicating with the test bottle; and the discharge port is provided with a first discharge pipe, and the first discharge pipe is provided with a first valve body for opening or closing the discharge pipe.

[0011] Furthermore, the sludge circulation tank is equipped with an aeration pipe for connecting to an external air supply device.

[0012] Furthermore, a first pipeline is provided between the sludge outlet in the sludge circulation tank and the sludge inlet of the test bottle, and a diaphragm metering pump for pumping sludge from the sludge circulation tank to the test bottle is provided on the first pipeline.

[0013] Furthermore, the water collector includes a cylindrical section and a conical section connected in series, with the conical section located below the cylindrical section; the cylindrical section is provided with a sewage inlet for communicating with the sewage inlet pipe, and an overflow outlet for causing sewage to overflow from the water collector; the bottom end of the conical section is provided with an installation pipe, the middle part of which is connected to the conical section, one end of which is connected to the sewage inlet, and the other end of which is provided with a second sewage pipe, the second sewage pipe being provided with a second valve body for opening or closing the second sewage pipe.

[0014] Furthermore, a main pipe is provided connected to the first interface, and branch pipes are respectively provided between the water tank and the reagent tank and the main pipe. A second pump body is provided on the main pipe, and the second pump body is used to pump water and reagent to the test bottle.

[0015] Furthermore, a second pipeline is provided between the water tank and the test bottle, and a third pump body is provided on the second pipeline for pumping water to the test bottle.

[0016] Furthermore, the stirring unit includes a magnetic actuator placed below the test bottle and a magnetic stir bar placed inside the test bottle.

[0017] The working principle and beneficial effects of this utility model are as follows: The wastewater influent toxicity online detection system provided by this utility model uses a first pump to make sludge flow from one end of the circulation pipeline to the other end of the circulation pipeline, that is, to make sludge flow from one position in the biological treatment tank to another position; and the sludge circulation tank used to store sludge is connected to the middle of the circulation pipeline. Therefore, the sludge flowing in the biological treatment tank can be taken out in real time in the sludge circulation tank, thereby making the detection results more objective and accurate. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 A simplified connection diagram of the components of the wastewater influent toxicity online detection system provided in this embodiment of the utility model;

[0020] Figure 2 A schematic diagram of the sludge circulation pipe provided in an embodiment of this utility model;

[0021] Figure 3 A schematic diagram of a water dispenser provided in an embodiment of this utility model.

[0022] In the diagram: 100, sludge circulation tank; 110, inlet; 120, connecting pipe; 130, overflow port; 140, discharge port; 150, first discharge pipe; 151, first valve body; 160, outlet; 170, first pipe; 200, water intake device; 210, cylindrical section; 211, sewage inlet; 212, overflow port; 220, conical section; 230, installation pipe; 240 1. Second sewage pipe; 300. Test bottle; 310. Aeration disc; 320. Magnetic stir bar; 400. Clear water tank; 500. Chemical tank; 600. Biological tank; 610. Circulation pipeline; 620. First pump body; 700. Diaphragm metering pump; 800. Sewage inlet pipe; 910. Main pipe; 920. Branch pipe; 930. Second pump body; 940. Second pipeline; 950. Third pump body. Detailed Implementation

[0023] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0024] This embodiment provides an online toxicity detection system for wastewater treatment plant influent, which will be referred to as the detection system below. (See reference...) Figure 1 As shown, it includes a sludge circulation tank 100, a water collector 200, a test bottle 300, a clean water tank 400, and a reagent tank 500.

[0025] The sludge circulation tank 100 is connected to the biological treatment tank 600 to hold the sludge transported from the biological treatment tank 600. In this embodiment, the connection method between the sludge circulation tank 100 and the biological treatment tank 600 is as follows: Figure 1 As shown, a circulation pipe 610 is provided on the biological treatment tank 600. The two ends of the circulation pipe 610 extend into different positions in the biological treatment tank 600. A first pump body 620 is provided on the circulation pipe 610. The first pump body 620 enables sludge to enter the circulation pipe 610 from one end and return to the biological treatment tank 600 from the other end.

[0026] refer to Figure 1 and Figure 2 As shown, a sludge inlet 110 is provided on the sludge circulation tank 100, and a connecting pipe 120 is provided between the middle of the circulation pipe 610 and the sludge inlet 110.

[0027] Through the above structure, the first pump body 620 can make the sludge form a cycle from the biological treatment tank 600 to the circulation pipeline 610 and back to the biological treatment tank 600. When testing is required, a portion of sludge can be taken from the circulation pipeline 610 and put into the sludge circulation tank 100 for later use. Since the sludge is constantly circulating in the circulation pipeline 610, the sludge used for testing in the sludge circulation tank 100 is relatively random rather than fixed-position sludge, which can better ensure the activity of the sludge, thereby better reflecting the toxicity of the influent based on the test results.

[0028] refer to Figure 2 As shown, the sludge circulation tank 100 of this embodiment is also provided with an overflow port 130 for allowing sludge to overflow from the sludge circulation tank 100. Specifically, when the sludge stored in the sludge circulation tank 100 is higher than the overflow port 130, the sludge in the sludge circulation tank 100 will overflow from the overflow port 130 to avoid excessive pressure in the sludge circulation tank 100.

[0029] refer to Figure 1 and Figure 2 As shown, a sludge discharge port 140 for discharging sludge is provided at the bottom of the sludge circulation tank 100, and the sludge discharge port 140 is connected to a first discharge pipe 150. A first valve body 151 for opening or closing the discharge pipe is provided on the first discharge pipe 150.

[0030] In this embodiment, by setting the drain outlet 140, the first drain pipe 150 and the first valve body 151, when needed, the sludge in the sludge circulation tank 100 can be completely emptied by opening the first valve body 151 and opening the drain pipe, so as to completely fill the tank with new sludge, avoiding cross-contamination of sludge and affecting the test results.

[0031] In this embodiment, an aeration pipe is also fixed inside the sludge circulation tank 100. This aeration pipe is connected to an external air supply device so that air is supplied to the sludge circulation tank 100 by the air supply device and the aeration pipe. By aerating the sludge circulation tank 100 through the air supply device and the aeration pipe, the activity of the sludge in the sludge circulation tank 100 can be maintained. It should be noted that the aeration pipe and the air supply device can refer to the prior art, and will not be described in detail here. Their structure is also not shown in the accompanying drawings of this embodiment.

[0032] refer to Figure 1 and Figure 2 As shown, in this embodiment, the sludge circulation tank 100 is further provided with a sludge outlet 160, and a first pipeline 170 is provided between the sludge outlet 160 and the sludge inlet of the test bottle 300. A diaphragm metering pump 700 for pumping sludge from the sludge circulation tank 100 to the test bottle 300 is provided on the first pipeline 170. By providing this diaphragm metering pump 700, sludge can be quantitatively delivered into the test bottle 300.

[0033] refer to Figure 1 and Figure 3 As shown, the water sampler 200 of this embodiment includes a cylindrical section 210 and a conical section 220 connected in series, wherein the conical section 220 is located below the cylindrical section 210. A sewage inlet 211 is provided on the cylindrical section 210 for communication with a sewage inlet pipe 800 of a sewage treatment plant. Sewage in the sewage inlet pipe 800 can enter the water sampler 200 through the sewage inlet 211 for detection.

[0034] refer to Figure 1 and Figure 3 As shown, the water dispenser 200 is also provided with an overflow port 212 for causing sewage to overflow from the water dispenser 200, so as to avoid excessive water pressure inside the water dispenser 200.

[0035] refer to Figure 1 and Figure 3 As shown, an installation pipe 230 is provided at the bottom end of the conical section 220. The inner hole of the installation pipe 230 communicates with the inner cavity of the conical section 220, and one end of the installation pipe 230 is connected to the sewage inlet of the test bottle 300. A second drain pipe 240 is provided at the other end of the installation pipe 230. A second valve body is provided on the second drain pipe 240 to enable or disable the second drain pipe 240. When the second valve body is open, the sewage in the water sampler 200 can be completely discharged from the second drain pipe 240, thereby completely refreshing the sewage in the water sampler 200 and preventing cross-contamination of sewage from affecting the test results.

[0036] refer to Figure 1 As shown, in this embodiment, a main pipe 910 is connected to the first interface. Branch pipes 920 are respectively provided between the water tank 400 and the reagent tank 500 and the main pipe 910. A second pump body 930 is provided on the main pipe 910, which is used to pump water and reagent to the test bottle 300. A second pipeline 940 is provided between the water tank 400 and the test bottle 300, and a third pump body 950 is provided on the second pipeline 940 for pumping water to the test bottle 300. The diameter of the second pipeline 940 is larger than the diameter of the main pipe 910.

[0037] In this embodiment, by setting the above-described structure, during testing, the second pump body 930 can pump a fixed amount of clean water and nutrients required for microorganisms into the test bottle 300. When it is necessary to replace the nutrients in the reagent tank 500, the second pump body 930 can pump clean water into the test bottle 300 to clean the main pipe 910. When the testing is completed and the test bottle 300 needs to be cleaned, the third pump body 950 can pump a large amount of clean water into the test bottle 300 through the second pipeline 940, and then discharge it through the outlet of the test bottle 300 to complete the cleaning of the test bottle 300.

[0038] In this embodiment, an aeration disc 310 connected to an external air supply device is provided inside the test bottle 300 to aerate the test bottle 300 and provide oxygen support for the microorganisms. It should be noted that the aeration disc 310 and the air supply device can refer to the prior art, and will not be described in detail here. Furthermore, the detailed structure of the aeration disc 310 and the air supply device is not shown in the accompanying drawings of this embodiment.

[0039] In this embodiment, the stirring unit includes a magnetic actuator positioned below the test bottle 300 and a magnetic stir bar 320 placed inside the test bottle 300. It should be noted that the magnetic actuator and magnetic stir bar 320 can be existing products, and their structure and working principle will not be described in detail here.

[0040] In this embodiment, a dissolved oxygen meter is installed inside the test bottle 300 to detect the dissolved oxygen of the sample inside the test bottle 300.

[0041] Based on the above overall structure, the workflow of the wastewater treatment plant influent toxicity online detection system in this embodiment is as follows:

[0042] Phase 1: Add a measured amount of sludge, clean water, and nutrients to the test bottle 300, aerate until the dissolved oxygen is at its maximum, and then let it stand for 5-15 minutes. Record the dissolved oxygen change curve in real time throughout the process, and calculate the respiration rate curve of the sludge formed by the system.

[0043] Second stage: After the first stage, a certain amount of sewage is pumped into the test bottle 300, aerated until the dissolved oxygen is at its maximum, and then left for 5-15 minutes. The dissolved oxygen change curve is recorded in real time throughout the process, and the respiration rate curve of the sludge is calculated by the system.

[0044] The toxicity value of wastewater is calculated by comparing respiration rate curve 1 and respiration rate curve 2. The greater the difference between respiration rate curve 2 and respiration rate curve 1, the greater the toxicity value of the wastewater.

[0045] By comparing the respiration rate curves on different dates, the activity of the sludge can be reflected.

[0046] The above testing process can be performed on time or as needed to achieve online detection of influent toxicity.

[0047] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An online toxicity detection system for wastewater treatment plant influent, characterized in that: The system includes a sludge recycling tank (100), a water collector (200), a test bottle (300), a clean water tank (400), and a reagent tank (500); the sludge recycling tank (100) is connected to a biological treatment tank (600) to hold sludge transported from the biological treatment tank (600); the water collector (200) is connected to a sewage inlet pipe (800) to hold sewage transported from the sewage inlet pipe (800); the test bottle (300) has a connection with the sludge recycling tank (100). The sludge inlet is connected to the output end of the 00), and the sewage inlet is connected to the output port of the water collector (200); the test bottle (300) is also provided with a first interface for connecting to the clean water tank (400) and the reagent tank (500); the test bottle (300) is also provided with an aeration disc (310) for communicating with an external air supply device, a dissolved oxygen meter is inserted in the test bottle (300), and a stirring unit is provided in the test bottle (300); It also includes a circulation pipeline (610) and a first pump body (620). The two ends of the circulation pipeline (610) are respectively connected to the biological treatment tank (600). The first pump body (620) is used to make sludge enter one end of the circulation pipeline (610) from the biological treatment tank (600) and return to the biological treatment tank (600) through the other end of the circulation pipeline (610). The sludge circulation tank (100) is connected to the middle part of the circulation pipeline (610).

2. The online toxicity detection system for wastewater treatment plant influent according to claim 1, characterized in that, The sludge circulation tank (100) is provided with an inlet (110) for communicating with the circulation pipeline (610), an overflow port (130) for overflowing sludge in the sludge circulation tank (100), a drain port (140) for discharging sludge in the sludge circulation tank (100), and an outlet (160) for communicating with the test bottle (300); and the drain port (140) is provided with a first drain pipe (150), and the first drain pipe (150) is provided with a first valve body (151) for opening or closing the drain pipe.

3. The online toxicity detection system for wastewater treatment plant influent according to claim 2, characterized in that, The sludge circulation tank (100) is equipped with an aeration pipe for connecting to an external air supply device.

4. The online toxicity detection system for wastewater treatment plant influent according to claim 2, characterized in that, A first pipeline (170) is provided between the sludge outlet (160) in the sludge circulation tank (100) and the sludge inlet of the test bottle (300), and a diaphragm metering pump (700) is provided on the first pipeline (170) for pumping sludge from the sludge circulation tank (100) to the test bottle (300).

5. The online toxicity detection system for wastewater treatment plant influent according to any one of claims 1 to 4, characterized in that, The water collector (200) includes a cylindrical section (210) and a conical section (220) connected in series, with the conical section (220) located below the cylindrical section (210). The cylindrical section (210) is provided with a sewage inlet (211) for communicating with the sewage inlet pipe (800) and an overflow outlet (212) for sewage to overflow from the water collector (200). The bottom end of the conical section (220) is provided with an installation pipe (230), the middle part of which is connected to the conical section (220). One end of the installation pipe (230) is connected to the sewage inlet, and the other end of the installation pipe (230) is provided with a second sewage pipe (240). The second sewage pipe (240) is provided with a second valve body for opening or closing the second sewage pipe (240).

6. The online toxicity detection system for wastewater treatment plant influent according to any one of claims 1 to 4, characterized in that, A main pipe (910) is provided connected to the first interface. Branch pipes (920) are respectively provided between the water tank (400) and the medicine tank (500) and the main pipe (910). A second pump body (930) is provided on the main pipe (910). The second pump body (930) is used to pump water and medicine to the test bottle (300).

7. The online toxicity detection system for wastewater treatment plant influent according to claim 6, characterized in that, A second pipeline (940) is provided between the water tank (400) and the test bottle (300), and a third pump body (950) is provided on the second pipeline (940) for pumping water to the test bottle (300).

8. The online toxicity detection system for wastewater treatment plant influent according to any one of claims 1 to 4, characterized in that, The stirring unit includes a magnetic actuator placed below the test bottle (300) and a magnetic stir bar (320) placed inside the test bottle (300).

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