An online detection device and method for toxicity of influent in sewage treatment plant

Abstract

The invention discloses an online detection device and method for the toxicity of influent water in a sewage treatment plant, comprising an influent quantitative sampling component, a sludge quantitative sampling component, a main reaction component, a water bath heating component and a controller, wherein the influent quantitative sampling component and the sludge quantitative sampling component are respectively connected to the main reaction component, the water bath heating component is used to heat the influent quantitative sampling component, the sludge quantitative sampling component and the main reaction component, and the controller is connected to the influent quantitative sampling component, the sludge quantitative sampling component, the main reaction component and the water bath heating component for communication. The invention can stably, simply and sensitively detect the toxicity of influent water in a sewage treatment plant online, can quickly monitor and warn the toxicity of influent sewage, so that the sewage treatment plant can take emergency measures when toxic and harmful conditions suddenly occur, and effectively ensure the safe and stable operation of the sewage treatment plant.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage detection, and in particular relates to an online detection device and method for influent toxicity of a sewage treatment plant. Background Art

[0002] At present, most of my country's sewage treatment plants use the activated sludge method to treat sewage. The activated sludge method uses the physiological metabolic activities of microorganisms in the activated sludge to remove pollutants in the wastewater. At present, the system operation status is mainly evaluated by the system effluent quality and operation experience. The effluent evaluation has a lag (the HRT of the sewage plant is about 20h). Once the effluent exceeds the standard, only high-cost deep treatment can be enabled. The more unfavorable situation is: the influent contains toxic substances such as PPCP, the biological system collapses, and it takes several weeks for the system to restart, which puts great pressure on stable operation.

[0003] Traditional online water quality monitoring technology is mainly based on conventional water quality indicators, such as dissolved oxygen, COD, conductivity, etc. Although these indicators can quickly reflect the water pollution situation, they cannot accurately reveal the impact of toxic substances on the sewage treatment system.

[0004] The current mainstream research direction is online monitoring technology for water quality biological toxicity. The luminous bacteria detection method can detect the comprehensive toxicity of water quality and is listed as one of the standard methods for water quality toxicity detection. It uses the changes in the behavioral ecology of living organisms when water quality changes or is polluted to automatically record and analyze the obtained data, analyze water quality changes from a biological perspective, and use comprehensive knowledge from multiple disciplines such as environment, ecology, biology, and chemistry. It uses risk analysis techniques such as mathematics and probability theory to predict, analyze and evaluate the possible damage that toxic substances may cause to the ecosystem, thereby effectively supervising the quality of water resources and the dynamics of pollution discharge.

[0005] However, imported equipment is large in size, high in cost, and complex to operate; domestically developed instruments have a low degree of automation. Moreover, microbial preparations need to be activated before use, and the activity of microorganisms cannot be kept constant, both of which are difficult to meet the needs of in-situ online detection of water toxicity. In addition, the activity of luminescent bacteria at room temperature is short, which also limits the application of luminescent bacteria method in online detection of water toxicity.

[0006] Microbial preparations cannot fully reflect the toxicity of the influent of sewage treatment plants. This is mainly manifested in the following aspects: toxic substances that can affect the microbial activity of preparations may have limited effects on activated sludge, and toxic substances that have a greater impact on sludge activity may not cause significant changes in microbial preparations.

[0007] In summary, there is an urgent need for a device and method for detecting the activity of local sludge microorganisms in a sewage treatment plant to reflect the toxicity of influent. Summary of the invention

[0008] In order to solve the above technical problems, the present invention provides an online detection device and method for the toxicity of influent in a sewage treatment plant.

[0009] The present invention discloses an online detection device for influent toxicity of a sewage treatment plant, comprising an influent quantitative sampling component, a sludge quantitative sampling component, a main reaction component, a water bath heating component and a controller. The influent quantitative sampling component and the sludge quantitative sampling component are respectively connected to the main reaction component. The water bath heating component is used to heat the influent quantitative sampling component, the sludge quantitative sampling component and the main reaction component. The controller is communicatively connected with the influent quantitative sampling component, the sludge quantitative sampling component, the main reaction component and the water bath heating component.

[0010] The above technical solution is preferred, wherein the main reaction assembly includes a main reactor, a main reactor overflow pipe, a built-in flow maker, a main reactor discharge valve and a main reactor emptying pump, the main reactor overflow pipe is provided at the upper part of the main reactor, the built-in flow maker is provided inside the main reactor, and the main reactor discharge valve and the main reactor emptying pump are provided outside the lower end of the main reactor in sequence.

[0011] The above technical solution is preferred, wherein the water bath heating assembly comprises a water bath reaction tank, a water bath heater, a water bath agitator and a temperature electrode, the lower end of the main reactor extends into the water bath reaction tank, the water bath heater and the water bath agitator are arranged in the water bath reaction tank, and one end of the temperature electrode extends into the main reactor.

[0012] Preferably, the above technical solution is provided with a dissolved oxygen electrode at the upper end of the main reactor, a gas distributor is provided inside the main reactor, and the gas distributor is externally connected to an air pump.

[0013] The above technical solution is preferred, wherein the water inlet quantitative sampling assembly includes a water inlet quantitative sampling bottle, a water inlet pump and a sewage inlet pump, the water inlet quantitative sampling bottle is connected to the water inlet pump through an inlet pipe, the water inlet quantitative sampling bottle is connected to the main reactor through the sewage inlet pump, and a water inlet overflow pipe is provided on the upper part of the water inlet quantitative sampling bottle.

[0014] The above technical solution is preferred, wherein the sludge quantitative sampling assembly comprises a sludge quantitative sampling bottle, a sludge sampling pump, a sludge concentration detector, a sludge sampling valve and a sludge sampling pump, wherein the sludge quantitative sampling bottle is connected to the sludge sampling valve and the sludge sampling pump in sequence, wherein the sludge quantitative sampling bottle is connected to the main reactor via the sludge sampling pump, wherein the sludge concentration detector extends into the sludge quantitative sampling bottle, and a sludge overflow pipe is provided on the upper portion of the sludge quantitative sampling bottle.

[0015] Preferably, the above technical solution is characterized in that the controller is communicatively connected with the touch display.

[0016] The present invention provides a detection method for the online detection device for the toxicity of influent of a sewage treatment plant as described above, comprising the following steps:

[0017] S1. Set various working parameters and water bath heating before starting;

[0018] S2. Perform main reactor cleaning procedure;

[0019] S3. Start the water sampling program and the sludge sampling program at the same time;

[0020] S4. Perform an integral measurement procedure based on the data measured in step 3.

[0021] The above technical scheme is preferred, and the water sampling procedure in the step S3 specifically includes the following steps: the water inlet pump is turned on, and the water inlet pump is turned off after a certain period of time; the sewage sampling pump is turned on after a certain period of time, and the built-in flow maker is always in working state at this time; the sewage sampling pump is turned off after a certain period of time; the sludge sampling procedure in the step S3 specifically includes the following steps: the sludge sampling valve is opened, the sludge sampling pump is turned on after a certain delay, and the sludge sampling pump is turned off after a certain period of time; the sludge sampling valve is closed after a certain delay; after a certain delay, the sludge concentration detector reads the data D1 at this time; and then the sludge sampling pump is started after a certain period of time, and the sludge sampling pump is turned off after a certain period of time.

[0022] The above technical solution is preferred, and the S4 step specifically includes the following steps: controlling the temperature of the main reactor by the temperature electrode and the water bath heater to see whether the set temperature value is greater than or equal to 20-35°C, if it is in a constant temperature state, and proceeding to the next step; starting the air pump, and the aeration time step is t 05 ; The controller determines whether the dissolved oxygen value DO in the main reactor reaches the set value DO0 of step S1 through the detection of the dissolved oxygen electrode. If it reaches the set value DO0, the air pump is turned off and the next step is entered; The controller determines whether the dissolved oxygen value DO in the main reactor reaches the set value DO1 of step S1 through the detection of the dissolved oxygen electrode, and records the time t when the dissolved oxygen electrode detection value reaches DO1 30 , record time t 30 DO value of the rear dissolved oxygen electrode 30; Calculate the integral area according to the integral step length ts, and display the dissolved oxygen decay curve on the touch display, wherein the integral calculation method uses the sludge activity index κ to characterize the changing trend of sludge activity, and the numerical meaning of the sludge activity index κ is the product of the inverse of the integral of the dissolved oxygen saturation decay curve and time and the activated sludge constant; The logic controller determines whether the dissolved oxygen value DO in the main reactor reaches the set value DO2 of the step S1 through the dissolved oxygen electrode detection, and stops the integral calculation after reaching DO2; Display the value of Y=κ / D1; Store the Y, κ values ​​and the dissolved oxygen decay curve; Open the main reactor discharge valve after a certain period of time; Open the main reactor emptying pump and air pump after a certain delay; After a certain period of time, turn off the main reactor emptying pump and air pump; Turn off the built-in flow maker.

[0023] The advantages and positive effects of the present invention are as follows: the present invention provides an online detection device and method for the toxicity of the influent of a sewage treatment plant, which can stably, simply and sensitively detect the toxicity of the influent of a sewage treatment plant online, and can quickly monitor and warn the toxicity of the sewage entering the plant, so that the sewage plant can take emergency measures when toxic and harmful situations suddenly occur, thereby effectively ensuring the safe and stable operation of the sewage plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an online detection device for influent toxicity of a sewage treatment plant provided by an embodiment of the present invention;

[0025] Figure 2 This is a front view of a main reactor tank provided by one embodiment of the present invention;

[0026] Figure 3 is a top view of a main reactor tank provided by one embodiment of the present invention;

[0027] Figure 4 This is a front view of a flange of a main reactor provided by one embodiment of the present invention;

[0028] Figure 5 is a top view of a flange of a main reactor provided by one embodiment of the present invention;

[0029] Figure 6 is a flow chart of a detection method of an online detection device provided by an embodiment of the present invention;

[0030] Figure 7 It is a flow chart of an integral measurement procedure provided by one embodiment of the present invention.

[0031] Among them: 1. Water bath reaction tank; 2. Water bath heater; 3. Water bath agitator; 4. Water inlet pump; 5. Water inlet pipe; 6. Water inlet quantitative sampling bottle; 7. Water inlet overflow pipe; 8. Sewage sampling pump; 9. Main reactor; 10. Main reactor overflow pipe; 11. Built-in flow maker; 12. Main reactor discharge valve; 13. Main reactor emptying pump; 14. Dissolved oxygen electrode; 15. Temperature electrode; 16. Air pump; 17. Gas distributor; 18. Sludge quantitative sampling bottle; 19. Sludge sampling valve; 20. Sludge sampling pump; 21. Sludge concentration detector; 22. Sludge overflow pipe; 23. Sludge sampling pump; 24. Logic controller; 25. Touch display; 26. Electrode and wire screw interface; 27. Flange screw hole; 28. Cone bottom interface. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "lower", "up", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 indirectly connected 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 by specific circumstances.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0036] On the one hand, this embodiment provides an online detection device for the toxicity of influent water in a sewage treatment plant, such as Figure 1-5As shown, it includes an inlet water quantitative sampling component, a sludge quantitative sampling component, a main reaction component, a water bath heating component and a controller. The inlet water quantitative sampling component and the sludge quantitative sampling component are respectively connected to the main reaction component. The water bath heating component is used to heat the inlet water quantitative sampling component, the sludge quantitative sampling component and the main reaction component. The controller is communicatively connected with the inlet water quantitative sampling component, the sludge quantitative sampling component, the main reaction component and the water bath heating component.

[0037] Specifically, the main reaction assembly includes a main reactor 9, a main reactor overflow pipe 10, a built-in flow maker 11, a main reactor discharge valve 12 and a main reactor emptying pump 13. The main reactor overflow pipe 10 is provided at the upper part of the main reactor 9, the built-in flow maker 11 is provided inside the main reactor 9, and the main reactor discharge valve 12 and the main reactor emptying pump 13 are provided outside the lower end of the main reactor 9 in sequence.

[0038] Specifically, the water bath heating assembly includes a water bath reaction pool 1, a water bath heater 2, a water bath agitator 3 and a temperature electrode 15. The lower end of the main reactor 9 extends into the water bath reaction pool 1. The water bath heater 2 and the water bath agitator 3 are provided in the water bath reaction pool 1. One end of the temperature electrode 15 extends into the main reactor 9.

[0039] Specifically, a dissolved oxygen electrode 14 is disposed at the upper end of the main reactor 9 , a gas distributor 17 is disposed inside the main reactor 9 , and an air pump 16 is externally connected to the gas distributor 17 .

[0040] Optionally, the main reactor 9 includes a main reactor flange and a main reactor tank body, the upper end of the main reactor tank body is open and provided with a flange, the flange is provided with a flange screw hole 27, the lower end of the main reactor tank body is conical, and the lowermost end is provided with a cone bottom interface 28, which is used to connect the main reactor discharge valve 12 and the main reactor emptying pump 13 through a pipeline. A main reactor flange is provided above the main reactor tank body, and a flange screw hole 27 is also provided on the main reactor flange corresponding to the flange screw hole 27 on the flange, and the main reactor flange and the main reactor tank body are connected by screws, and a plurality of electrode and guide wire screw interfaces 26 are provided on the main reactor flange for connecting the dissolved oxygen electrode 14, the temperature electrode 15 and various pipelines.

[0041] Specifically, the water inlet quantitative sampling assembly includes a water inlet quantitative sampling bottle 6, a water inlet pump 4 and a sewage inlet pump 8. The water inlet quantitative sampling bottle 6 is connected to the water inlet pump 4 through an inlet pipe 5, and the water inlet quantitative sampling bottle 6 is connected to the main reactor 9 through the sewage inlet pump 8. A water inlet overflow pipe 7 is provided on the upper part of the water inlet quantitative sampling bottle 6.

[0042] Specifically, the sludge quantitative sampling assembly includes a sludge quantitative sampling bottle 18, a sludge sampling pump 23, a sludge concentration detector 21, a sludge sampling valve 19 and a sludge sampling pump 20. The sludge quantitative sampling bottle 18 is connected to the sludge sampling valve 19 and the sludge sampling pump 20 in sequence. The sludge quantitative sampling bottle 18 is connected to the main reactor 9 through the sludge sampling pump 23. The sludge concentration detector 21 extends into the sludge quantitative sampling bottle 18. A sludge overflow pipe 22 is provided at the upper part of the sludge quantitative sampling bottle 18.

[0043] Specifically, the controller is in communication connection with the touch display 25. In this embodiment, the controller is a logic controller 24.

[0044] The water bath heater 2 and the water bath agitator 3 are linked with the temperature electrode 15 to achieve stable and uniform temperature control. The temperature control range is 15 to 35°C and the control accuracy is ±0.2°C.

[0045] Principle of quantitative determination of sludge in the sludge quantitative sampling bottle 18: The sludge pumped by the sludge sampling valve 19 and the sludge sampling pump 20 through the timing control of the controller can overflow from the sludge overflow pipe 22, at which time the sludge volume in the sludge quantitative sampling bottle 18 can be guaranteed to be constant. 03 The redundant time will ensure that all the sludge in the sludge quantitative sampling bottle 18 is pumped into the main reactor 9. Therefore, the volume of the sludge in the main reactor 9 during the detection process will depend on the pumping volume of the sludge quantitative sampling bottle 18, thereby achieving quantification.

[0046] The principle of achieving quantification by the water quantitative sampling bottle 6 is the same as that of the sludge quantitative sampling bottle 18, and will not be described in detail here.

[0047] The inlet water quantitative sampling bottle 6, the main reactor 9, and the sludge quantitative sampling bottle 18 are placed in the water bath reaction tank 1 to provide a stable preheating environment for the inlet water quantitative sampling bottle 6 and the sludge quantitative sampling bottle 18, while ensuring that the reaction temperature conditions of the main reactor 9 are constant during the detection process.

[0048] The built-in flow generator 11 ensures the air tightness of the main reactor 9 while achieving the functions of mixing, cleaning and stirring in the container.

[0049] Main reactor 9 cleaning procedure:

[0050] A. Sludge sampling valve 19 is opened, and after time t 01 Then start the sludge sampling pump 20, after t 02 After a certain time, the sludge sampling pump 20 is turned off, so that the extracted sludge can overflow from the sludge overflow pipe 22 and the sludge volume in the sludge quantitative sampling bottle 18 is constant.

[0051] B. The sludge sampling pump 23 is turned on, and after time t03 After the sludge sampling pump 23 is closed, the time t 03 The redundant time will ensure that all the sludge in the sludge quantitative sampling bottle 18 is pumped into the main reactor 9.

[0052] C. Open the built-in flow generator 11 in the main reactor 9, and through the operation of the built-in flow generator 11, the main reactor 9 is cleaned and the pre-reaction for the next detection is realized.

[0053] D. Determine whether the number of times n of mud entering the main reactor 9 is greater than the set number of times n0 of mud entering for cleaning. If n is not greater than n0, repeat from step A; if n is greater than n0, set n in the logic controller 24 to zero, and open the main reactor discharge valve 12 at the same time, and delay time t 01 Then the main reactor evacuation pump 13 and the air pump 16 are turned on, and after a time t 04 Finally, the main reactor evacuation pump 13 and the air pump 16 are turned off.

[0054] E. Complete a cleaning cycle.

[0055] Fn 01 The number of cleaning cycles is set. The delay time t 01 ,t 03 ,t 04 To protect the normal operation of each pump body and valve, and prevent leakage and pump blocking. The main reactor discharge valve 12 and the sludge sampling valve 19 are both electric ball valves to ensure stable operation. After entering the detection program, the water bath heater 2 and the temperature electrode 15 are linked to control the temperature in the main reactor 9 at 25-35°C. The air pump 16 and the dissolved oxygen electrode 14 are linked to control the dissolved oxygen value in the main reactor 9. The volume of the main reactor 9 is 0.8-2 times the sum of the volume of the water quantitative sampling bottle 6 and the sludge quantitative sampling bottle 18.

[0056] The control and numerical reading of the above-mentioned water inlet pump 4, sewage sampling pump 8, main reactor emptying pump 13, sludge sampling pump 20, sludge sampling pump 23, air pump 16, main reactor discharge valve 12, sludge sampling valve 19, built-in flow maker 11, water bath heater 2, water bath agitator 3, dissolved oxygen electrode 14, temperature electrode 15 and sludge concentration detector 21 are all controlled by the controller.

[0057] On the other hand, this embodiment provides a detection method of the online detection device for the toxicity of the influent of a sewage treatment plant as described above, such as Figure 6 and 7 As shown, the following steps are included:

[0058] 1. Before starting, set various working parameters Ts, n0, t through the touch display 25 01 ,t 02 ,t 03 ,t 04 、n01 ,t D , T0, t 05 ,t 21 ,t 22 、DO0、DO1、ts、DO2。

[0059] 2. Testing begins.

[0060] 3. Start the water bath heater 2 and the water bath agitator 3, and determine whether the reading of the temperature electrode 15 is greater than the initial temperature T S If the conditions are met, proceed to the next step. The temperature control range is 15-35℃, and the control accuracy is ±0.5℃.

[0061] 4. Start the main reactor 9 cleaning procedure:

[0062] A. Sludge sampling valve 19 is opened, and after time t 01 Then start the sludge sampling pump 20, after t 02 After a certain time, the sludge sampling pump 20 is turned off, so that the extracted sludge can overflow from the sludge overflow pipe 22 and the sludge volume in the sludge quantitative sampling bottle 18 is constant.

[0063] B. The sludge sampling pump 23 is turned on, and after time t 03 The sludge sampling pump 23 is then turned off. 03 The redundant time will ensure that all the sludge in the sludge quantitative sampling bottle 18 is pumped into the main reactor 9.

[0064] C. Open the built-in flow generator 11 in the main reactor 9, and through the operation of the built-in flow generator 11, the main reactor 9 is cleaned and the pre-reaction for the next detection is realized.

[0065] D. Determine whether the number of times n of mud entering the main reactor 9 is greater than the set number of times n0 of mud entering for cleaning. If it is not greater than n0, repeat from step A; if n is greater than n0, set n in the logic controller 24 to zero, and open the main reactor discharge valve 12 at the same time, delay t 01 Then the main reactor evacuation pump 13 and the air pump 16 are turned on, and after a time t 04 Finally, the main reactor evacuation pump 13 and the air pump 16 are turned off.

[0066] E. Complete one cleaning cycle, and the cleaning cycle n1 is increased by one.

[0067] F. The actual cleaning cycle n1 reaches the set cleaning cycle n 01 Then stop.

[0068] 5. Start the water sampling procedure:

[0069] A. Water inlet pump 4 is turned on, and after time t 21 The rear water pump 4 is turned off.

[0070] B. Elapsed time t 01 After that, the sewage sampling pump 8 is turned on. At this time, the built-in flow generator 11 is always in working state.

[0071] C. Elapsed time t 22 After that, the sewage sampling pump 8 is turned off.

[0072] 6. Start the sludge sampling procedure at the same time as step 5:

[0073] A. Sludge sampling valve 19 is opened, delay t 01 After time t, the sludge sampling pump 20 is turned on. 02 After a certain time, the sludge sampling pump 20 is turned off, and the extracted sludge can be ensured to overflow from the sludge overflow pipe 22 .

[0074] B. Delay t 01 After the time, the sludge sampling valve 19 is closed.

[0075] C. Delay t D After a certain time, the sludge concentration detector 21 reads the data D1 at this time.

[0076] D. Then after t D Time to start the sludge sampling pump 23, t 03 After time t, the sludge sampling pump is turned off for 20 seconds. 03 The redundant time will ensure that all the sludge in the sludge quantitative sampling bottle 18 is pumped into the main reactor 9.

[0077] 7. Start the integral measurement program:

[0078] A. Control the temperature of the main reactor 9 through the temperature electrode 15 and the water bath heater 2 to see if the set temperature value is greater than or equal to 20-35°C. If it is, enter the constant temperature state and proceed to the next step.

[0079] B. Start the air pump 16, and the aeration time step is t 05 .

[0080] C. The logic controller 24 determines whether the dissolved oxygen value DO in the main reactor 9 reaches the set value DO0 through the dissolved oxygen electrode 14. If it reaches the set value, the air pump 16 is turned off and the next step is entered.

[0081] D. The logic controller 24 determines whether the dissolved oxygen value DO in the main reactor 9 reaches the set value DO1 through the detection of the dissolved oxygen electrode 14, and records the time t when the detection value of the dissolved oxygen electrode 14 reaches DO1 30 , record time t 30 The value of the dissolved oxygen electrode 14 is DO 30 ;

[0082] E. Calculate the integral area according to the integral step length ts, and display the dissolved oxygen decay curve in the interactive display module. Integral calculation method:

[0083] The sludge activity index κ is used to characterize the changing trend of sludge activity. The numerical meaning of the sludge activity index κ is the product of the inverse of the integral of the dissolved oxygen saturation decay curve and time and the activated sludge constant, that is:

[0084]

[0085] Where f(T) is the decay function of dissolved oxygen saturation over time, sludge activity constant N0 = 1000-100000,

[0086] Y2=f(t1)=50%~100%, Y1=f(t2)=0%~50%.

[0087] F. The logic controller 24 determines whether the dissolved oxygen value DO in the main reactor 9 has reached the set value DO2 through the dissolved oxygen electrode 14, and stops the integral calculation after reaching DO2.

[0088] G. Displays the value of Y = κ / D1, where D1 is the delay t D The data read by the sludge concentration detector 21 after a certain period of time.

[0089] H. Storage Y, κ value and dissolved oxygen decay curve.

[0090] I. Elapsed time t 01 Then open the main reactor discharge valve 12.

[0091] J. Delay t 01 Then, the main reactor evacuation pump 13 and the air pump 16 are turned on.

[0092] K. Elapsed time t 04 Finally, the main reactor evacuation pump 13 and the air pump 16 are turned off.

[0093] L. Close the built-in flow generator 11.

[0094] 8. The measurement is completed.

[0095] The advantages and positive effects of the present invention are as follows: the present invention provides an online detection device and method for the toxicity of the influent of a sewage treatment plant, which can stably, simply and sensitively detect the toxicity of the influent of a sewage treatment plant online, and can quickly monitor and warn the toxicity of the sewage entering the plant, so that the sewage plant can take emergency measures when toxic and harmful situations suddenly occur, thereby effectively ensuring the safe and stable operation of the sewage plant.

[0096] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A detection method for an online detection device for influent toxicity in a sewage treatment plant, characterized in that: The online detection device for influent toxicity of a sewage treatment plant comprises an influent quantitative sampling component, a sludge quantitative sampling component, a main reaction component, a water bath heating component and a controller, wherein the influent quantitative sampling component and the sludge quantitative sampling component are respectively connected to the main reaction component, the water bath heating component is used to heat the influent quantitative sampling component, the sludge quantitative sampling component and the main reaction component, and the controller is communicatively connected with the influent quantitative sampling component, the sludge quantitative sampling component, the main reaction component and the water bath heating component; the main reaction component comprises a main reactor, a main reactor overflow pipe, a built-in flow maker, a main reactor discharge valve and a main reactor emptying pump, the main reactor is provided with the main reactor overflow pipe at the top, the built-in flow maker is provided inside the main reactor, and the lower end of the main reactor is provided with a The main reactor discharge valve and the main reactor emptying pump are sequentially provided; the water bath heating assembly includes a water bath reaction tank, a water bath heater, a water bath agitator and a temperature electrode, the lower end of the main reactor extends into the water bath reaction tank, the water bath heater and the water bath agitator are provided in the water bath reaction tank, and one end of the temperature electrode extends into the main reactor; the sludge quantitative sampling assembly includes a sludge quantitative sampling bottle, a sludge injection pump, a sludge concentration detector, a sludge sampling valve and a sludge sampling pump, the sludge quantitative sampling bottle is sequentially connected to the sludge sampling valve and the sludge sampling pump, the sludge quantitative sampling bottle is connected to the main reactor through the sludge injection pump, the sludge concentration detector extends into the sludge quantitative sampling bottle, and a sludge overflow pipe is provided on the upper part of the sludge quantitative sampling bottle; The detection method comprises the following steps: S1. Set various working parameters and water bath heating before starting; S2. Perform the main reactor cleaning procedure: A. The sludge sampling valve is opened, and the sludge sampling pump is turned on after a certain period of time, and the sludge sampling pump is turned off after a certain period of time. At this time, it can be ensured that the extracted sludge can overflow from the sludge overflow pipe, and the sludge volume in the sludge quantitative sampling bottle is constant; B. The sludge sampling pump is turned on, and after a certain period of time, the sludge sampling pump is turned off. The redundant time of the sludge sampling pump opening time in this step will ensure that all the sludge in the sludge quantitative sampling bottle is pumped into the main reactor; C. Open the built-in flow generator in the main reactor, and clean the main reactor and conduct pre-reaction for the next test through the operation of the built-in flow generator; D. Determine whether the number of times mud is introduced into the main reactor is greater than the set number of times mud is introduced for cleaning. If not, repeat from step A; if yes, set the number of times mud is introduced into the main reactor in the logic controller to zero, open the discharge valve of the main reactor at the same time, and start the main reactor emptying pump and air pump after a certain delay. After a certain period of time, close the main reactor emptying pump and air pump; E. After completing a cleaning cycle, the cleaning cycle increases by one; F. The actual cleaning cycle stops after reaching the set cleaning cycle; S3. Start the water sampling program and the sludge sampling program at the same time; S4. Perform an integral measurement procedure based on the data measured in step 3.

2. The detection method of the online detection device for influent toxicity of a sewage treatment plant according to claim 1 is characterized by: A dissolved oxygen electrode is arranged at the upper end of the main reactor, a gas distributor is arranged inside the main reactor, and an air pump is externally connected to the gas distributor.

3. The detection method of the online detection device for influent toxicity of a sewage treatment plant according to claim 1 is characterized by: The water inlet quantitative sampling assembly includes a water inlet quantitative sampling bottle, a water inlet pump and a sewage inlet pump. The water inlet quantitative sampling bottle is connected to the water inlet pump through an inlet pipe, and the water inlet quantitative sampling bottle is connected to the main reactor through the sewage inlet pump. A water inlet overflow pipe is provided on the upper part of the water inlet quantitative sampling bottle.

4. The detection method of the online detection device for influent toxicity of a sewage treatment plant according to claim 1 is characterized by: The controller is communicatively connected with the touch display.

5. The detection method of the online detection device for influent toxicity of a sewage treatment plant according to claim 1 is characterized in that: The water sampling procedure in the step S3 specifically includes the following steps: the water inlet pump is turned on, and the water inlet pump is turned off after a certain period of time; the sewage sampling pump is turned on after a certain period of time, and the built-in flow maker is always in working state; the sewage sampling pump is turned off after a certain period of time; the sludge sampling procedure in the step S3 specifically includes the following steps: the sludge sampling valve is turned on, the sludge sampling pump is turned on after a certain delay, and the sludge sampling pump is turned off after a certain period of time; the sludge sampling valve is closed after a certain delay; after a certain delay, the sludge concentration detector reads the data D1 at this time; the sludge sampling pump is started after a certain period of time, and the sludge sampling pump is turned off after a certain period of time.

6. The detection method of the online detection device for influent toxicity of a sewage treatment plant according to claim 5 is characterized in that: The S4 step specifically includes the following steps: controlling the temperature of the main reactor by the temperature electrode and the water bath heater to see whether the set temperature value is greater than or equal to 20-35°C, if it is, entering a constant temperature state, and proceeding to the next step; starting the air pump, and the aeration time step is t 05 ; The controller determines whether the dissolved oxygen value DO in the main reactor reaches the set value DO0 of step S1 through the detection of the dissolved oxygen electrode. If it reaches the set value DO0, the air pump is turned off and the next step is entered; The controller determines whether the dissolved oxygen value DO in the main reactor reaches the set value DO1 of step S1 through the detection of the dissolved oxygen electrode, and records the time t when the dissolved oxygen electrode detection value reaches DO1 30 , record time t 30 DO value of the rear dissolved oxygen electrode 30 ; Calculate the integral area according to the integral step length ts, and display the dissolved oxygen decay curve on the touch display, wherein the integral calculation method uses the sludge activity index κ to characterize the changing trend of sludge activity, and the numerical meaning of the sludge activity index κ is the product of the inverse of the integral of the dissolved oxygen saturation decay curve and time and the activated sludge constant; The logic controller determines whether the dissolved oxygen value DO in the main reactor reaches the set value DO2 of the step S1 through the dissolved oxygen electrode detection, and stops the integral calculation after reaching DO2; Display the value of Y=κ / D1; Store Y, κ values ​​and dissolved oxygen decay curve; Open the main reactor discharge valve after a certain period of time; Open the main reactor emptying pump and air pump after a certain delay; After a certain period of time, turn off the main reactor emptying pump and air pump; Turn off the built-in flow maker.

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