Comprehensive regulation and control method and device for AOA biochemical pool

Abstract

The invention belongs to the technical field of sewage treatment control, and discloses a comprehensive regulation and control method and device for an AOA biochemical pool. The comprehensive regulation and control method comprises the following steps: detecting inlet water ammonia nitrogen concentration and inlet water temperature; adjusting the concentration of aerobic non-dissolved oxygen according to the detected inlet water ammonia nitrogen concentration and inlet water temperature; detecting the ammonia nitrogen concentration of the aerobic final effluent in real time; according to the ammonia nitrogen concentration, detected in real time, of the aerobic final effluent, the aerobic final dissolved oxygen concentration is adjusted again; detecting the total nitrogen concentration of inlet water; adjusting the concentration of aerobic sludge according to the detected total nitrogen concentration of the inlet water; detecting the concentration of nitrate nitrogen in anoxic final effluent in real time; and adjusting the aerobic sludge concentration again according to the real-time detected nitrate nitrogen concentration of the anoxic final effluent. According to the invention, by detecting the multi-parameter concentration index, the biochemical section can be adjusted in time when the inflow water quality of the AOA biochemical pool sewage fluctuates, so that the risk that the effluent water quality exceeds the standard due to the fluctuation of the inflow water quality is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment control, and in particular relates to a comprehensive control method and device for an AOA biochemical pool. Background Art

[0002] With the rapid development of urbanization and industrialization in my country, the amount of sewage treatment is increasing, and the requirements for water treatment efficiency and quality are becoming higher and higher.

[0003] The Anaerobic-Oxy-Anoxic (AOA) process is a newly emerging wastewater treatment technology. Its biochemical tank consists of an anaerobic, aerobic, and anoxic section connected in series. In traditional wastewater treatment processes, the aerobic section often maintains a relatively high aeration rate. This approach not only wastes energy but also, depending on the specific influent wastewater, prevents microorganisms from utilizing high concentrations of dissolved oxygen, significantly compromising treatment effectiveness. To address this issue, some water purification plants have implemented a method that adjusts dissolved oxygen at the end of the aerobic phase based on effluent ammonia nitrogen concentration. However, due to the time difference between the aerobic phase and the effluent, this adjustment method exhibits a significant lag between dissolved oxygen adjustment and actual demand. Furthermore, many water purification plants make empirical adjustments to sludge concentration based on effluent water quality and operator experience. This approach also inevitably introduces a lag, leading to significant fluctuations in effluent quality.

[0004] Therefore, there is an urgent need for a comprehensive control method and device for the AOA biochemical pool that can make timely and comprehensive adjustments to dissolved oxygen and sludge concentration to solve the above problems.

[0005] In view of this, this application is hereby filed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiency of the existing technology in adjusting the dissolved oxygen and sludge concentration in the reaction tank, and the purpose is to provide a comprehensive control method for the AOA biochemical tank that can timely and comprehensively adjust the dissolved oxygen and sludge concentration.

[0007] Another object of the present invention is to provide a comprehensive control device using the above-mentioned comprehensive control method of the AOA biochemical pool.

[0008] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a comprehensive control method for AOA biochemical pool, comprising:

[0009] S1. Detecting the inlet ammonia nitrogen concentration and the inlet water temperature at a period T of 0.5-1.5 hours;

[0010] Adjust the concentration of aerobic dissolved oxygen according to the detected influent ammonia nitrogen concentration and influent temperature;

[0011] S2. After the adjustment in step S1 is completed, the ammonia nitrogen concentration of the aerobic end effluent is detected in real time;

[0012] According to the real-time detected ammonia nitrogen concentration of the aerobic end effluent, the aerobic end dissolved oxygen concentration is readjusted; wherein, the single adjustment gradient of the aerobic end dissolved oxygen concentration is readjusted to ±1mg / L;

[0013] SS1, detect the total nitrogen concentration of the influent at a period of T;

[0014] Adjust the concentration of aerobic final sludge according to the detected total nitrogen concentration of the influent;

[0015] SS2. After the adjustment in step SS1 is completed, the nitrate nitrogen concentration in the anoxic effluent is detected in real time;

[0016] According to the real-time detected nitrate nitrogen concentration of the anoxic terminal effluent, the aerobic terminal sludge concentration is readjusted; wherein, the single adjustment gradient of the aerobic terminal sludge concentration is readjusted to ±500 mg / L.

[0017] According to one embodiment of the present invention, a first adjustment standard and a second adjustment standard for aerobic end dissolved oxygen concentration corresponding to two different temperature ranges are preset;

[0018] Based on the concentration range of the detected influent ammonia nitrogen concentration, determine the corresponding aerobic end dissolved oxygen concentration adjustment target from the corresponding adjustment standard, and adjust the aerobic end dissolved oxygen concentration according to the determined concentration adjustment target; for influent ammonia nitrogen concentrations within the same concentration range, the aerobic end dissolved oxygen concentration adjustment target corresponding to the first adjustment standard shall be 1 mg / L lower than the aerobic end dissolved oxygen concentration adjustment target corresponding to the second adjustment standard;

[0019] When the inlet water temperature is detected to be greater than 15°C, the corresponding aerobic end dissolved oxygen concentration adjustment target is determined from the first adjustment standard according to the concentration range of the detected inlet ammonia nitrogen concentration;

[0020] When the inlet water temperature is detected to be less than 15° C., the corresponding aerobic undissolved oxygen concentration adjustment target is determined from the second adjustment standard according to the concentration range of the detected inlet water ammonia nitrogen concentration.

[0021] According to one embodiment of the present invention, in the first adjustment standard, different concentration ranges of influent ammonia nitrogen concentration correspond to different aerobic end dissolved oxygen concentration adjustment targets;

[0022] When the influent ammonia nitrogen concentration is less than 30 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 2 mg / L;

[0023] When the influent ammonia nitrogen concentration is greater than or equal to 30 mg / L and less than or equal to 40 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 3 mg / L;

[0024] When the influent ammonia nitrogen concentration is greater than 40 mg / L and less than or equal to 49 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 3.5 mg / L;

[0025] When the influent ammonia nitrogen concentration is greater than 49 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 4 mg / L.

[0026] According to one embodiment of the present invention, in the second adjustment standard, different concentration ranges of influent ammonia nitrogen concentration correspond to different aerobic end dissolved oxygen concentration adjustment targets;

[0027] When the influent ammonia nitrogen concentration is less than 30 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 3 mg / L;

[0028] When the influent ammonia nitrogen concentration is greater than or equal to 30 mg / L and less than or equal to 40 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 4 mg / L;

[0029] When the influent ammonia nitrogen concentration is greater than 40 mg / L and less than or equal to 49 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 4.5 mg / L;

[0030] When the influent ammonia nitrogen concentration is greater than 49 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 5 mg / L.

[0031] According to one embodiment of the present invention, the step S2 further includes: adjusting the aerobic dissolved oxygen concentration again and sending a reminder message;

[0032] Determine the adjustment method of the aerobic end dissolved oxygen according to the concentration range of the detected aerobic end effluent ammonia nitrogen concentration; and adjust the concentration of the aerobic end dissolved oxygen again according to the determined adjustment method of the aerobic end dissolved oxygen;

[0033] When the ammonia nitrogen concentration of the aerobic end effluent is less than 0.2 mg / L, the corresponding adjustment method for the aerobic end dissolved oxygen is to reduce it by 1 mg / L;

[0034] When the ammonia nitrogen concentration of the aerobic end effluent is greater than or equal to 0.2 mg / L and less than or equal to 0.6 mg / L, the corresponding adjustment method for the aerobic end dissolved oxygen is to maintain it unchanged;

[0035] When the ammonia nitrogen concentration in the aerobic end effluent is greater than 0.6 mg / L and less than or equal to 1.2 mg / L, the corresponding aerobic end dissolved oxygen is adjusted to increase by 1 mg / L and a reminder message is sent;

[0036] When the ammonia nitrogen concentration in the aerobic effluent is greater than 1.2 mg / L, the corresponding aerobic dissolved oxygen is adjusted by increasing it by 1 mg / L and sending a reminder message.

[0037] According to one embodiment of the present invention, the step SS1 includes: determining an adjustment range of aerobic terminal sludge concentration based on the detected influent total nitrogen concentration range;

[0038] When the total nitrogen concentration in the influent is less than 35 mg / L, the corresponding aerobic final sludge concentration range is 2800-3300 mg / L;

[0039] When the total nitrogen concentration in the influent is greater than or equal to 35 mg / L and less than or equal to 42 mg / L, the corresponding aerobic final sludge concentration range is 3300-3800 mg / L;

[0040] When the total nitrogen concentration in the influent is greater than 42 mg / L and less than or equal to 50 mg / L, the corresponding aerobic final sludge concentration range is 3800-4300 mg / L;

[0041] When the total nitrogen concentration of the influent is greater than 50 mg / L, the corresponding aerobic terminal sludge concentration range is 4300-4800 mg / L.

[0042] According to one embodiment of the present invention, the step SS2 further includes: adjusting the concentration of aerobic final sludge again and sending a reminder message;

[0043] According to the concentration range of nitrate nitrogen in the anoxic final effluent detected, the adjustment method of the aerobic final sludge concentration is determined;

[0044] When the nitrate nitrogen concentration in the anoxic final effluent is less than 2 mg / L, the corresponding aerobic final sludge concentration is adjusted to reduce by 500 mg / L;

[0045] When the nitrate nitrogen concentration in the anoxic final effluent is greater than or equal to 2 mg / L and less than or equal to 6 mg / L, the corresponding aerobic final sludge concentration is adjusted to remain unchanged;

[0046] When the nitrate nitrogen concentration in the anoxic final effluent is greater than 6 mg / L, the corresponding aerobic final sludge concentration is adjusted to increase by 500 mg / L and a reminder message is sent.

[0047] According to one embodiment of the present invention, the comprehensive control method further comprises: SS3, detecting sludge concentration and sludge discharge status at a period T, and determining a control method.

[0048] According to one embodiment of the present invention, the sludge state includes: higher than a control value, lower than a control value, higher than a control value and in an upward trend, and lower than a control value and in a downward trend;

[0049] The mud discharge status includes: mud discharge in progress and mud not discharged;

[0050] If the detected sludge concentration is higher than the control value and is in a state of not discharging sludge, the control starts to discharge sludge;

[0051] If the detected sludge concentration is higher than the control value and the sludge is being discharged, the sludge discharge volume will be increased;

[0052] If the detected sludge concentration is lower than the control value and the sludge is being discharged, the sludge discharge volume is controlled to be reduced or the sludge discharge is controlled to be closed;

[0053] If the detected sludge concentration is higher than the control value and is on an upward trend, and is in a state where sludge is not discharged, the control starts sludge discharge;

[0054] If the detected sludge concentration is higher than the control value and is on an upward trend, and the sludge is being discharged, the sludge discharge volume will be increased;

[0055] If the detected sludge concentration is lower than the control value and is on a downward trend, and the sludge is being discharged, the sludge discharge is controlled to be closed.

[0056] According to one embodiment of the present invention, the rising trend refers to: the sludge concentration increases by 1000 mg / L in two adjacent periods T;

[0057] The downward trend means that the sludge concentration decreases by 1000 mg / L in two adjacent cycles T.

[0058] The present invention also provides a comprehensive control device for an AOA biochemical pool, which is applied with the above-mentioned comprehensive control method for an AOA biochemical pool. The comprehensive control device includes: a feedforward data model acquisition unit, a feedforward model analysis and operation parameter concentration preset unit, a feedback data model acquisition unit, a feedback model analysis and operation parameter concentration preset unit, an aeration control unit, and a sludge discharge and reflux control unit;

[0059] The aeration control unit is connected to the feedforward model analysis and operation parameter concentration preset unit and the feedback model analysis and operation parameter concentration preset unit;

[0060] The sludge discharge and reflux control unit is connected to the feedforward model analysis and operation parameter concentration preset unit and the feedback model analysis and operation parameter concentration preset unit.

[0061] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art: In the present invention, by detecting the inlet water temperature, inlet ammonia nitrogen concentration, aerobic end ammonia nitrogen concentration, inlet total nitrogen concentration and anoxic end effluent nitrate nitrogen concentration, the dissolved oxygen (DO) and mixed liquor suspended solids (MLSS) of the biochemical section can be adjusted in time when the inlet water quality of the AOA biochemical pool wastewater fluctuates, which greatly reduces the risk of pollutants such as chemical oxygen demand, ammonia nitrogen, and total phosphorus in the treated effluent exceeding the national or local emission standards due to fluctuations in the inlet water quality, thereby causing the effluent water quality to exceed the standard.

[0062] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings:

[0064] Figure 1 Flow chart of the steps of a comprehensive control method of an AOA biochemical pool in an embodiment of the present invention;

[0065] Figure 2 Table 1 shows the concentration range of the influent ammonia nitrogen concentration X in the first adjustment standard and the corresponding concentration adjustment target of the aerobic end dissolved oxygen in the embodiment of the present invention;

[0066] Figure 3 Table 2 shows the concentration range of the influent ammonia nitrogen concentration X in the second adjustment standard and the corresponding concentration adjustment target of the aerobic end dissolved oxygen in the embodiment of the present invention;

[0067] Figure 4 Table 3 shows the concentration range of the total nitrogen concentration Y in the influent and the corresponding adjustment range of the aerobic terminal sludge concentration in the embodiment of the present invention;

[0068] Figure 5 This is a module information transmission diagram of a comprehensive control device for an AOA biochemical pool in an embodiment of the present invention.

[0069] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0070] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0071] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0072] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0073] Figures 1 to 4 , which represents a comprehensive control method for AOA biochemical pool; Figure 5 , which represents a comprehensive control device for an AOA biochemical pool.

[0074] like Figures 1 to 4 As shown, the comprehensive control method of the AOA biochemical pool described in the present invention includes:

[0075] Control of DO (Dissolved Oxygen):

[0076] S1. Detecting the inlet ammonia nitrogen concentration and the inlet water temperature at a period T of 0.5-1.5 hours;

[0077] Adjust the concentration of aerobic dissolved oxygen according to the detected influent ammonia nitrogen concentration and influent temperature;

[0078] S2. (After the adjustment in step S1 is completed) real-time detection of ammonia nitrogen concentration in the aerobic final effluent;

[0079] According to the real-time detected ammonia nitrogen concentration of the aerobic end effluent, the aerobic end dissolved oxygen concentration is readjusted; wherein, the single adjustment gradient of the aerobic end dissolved oxygen concentration is readjusted to ±1mg / L;

[0080] Control of MLSS (Mixed Liquor Suspended Solids):

[0081] SS1, detect the total nitrogen concentration of the influent at a period of T;

[0082] Adjust the concentration of aerobic final sludge according to the detected total nitrogen concentration of the influent;

[0083] SS2, (after the adjustment in step SS1 is completed) real-time detection of the nitrate nitrogen concentration in the anoxic final effluent;

[0084] According to the real-time detected nitrate nitrogen concentration of the anoxic terminal effluent, the aerobic terminal sludge concentration is readjusted; wherein, the single adjustment gradient of the aerobic terminal sludge concentration is readjusted to ±500 mg / L.

[0085] In the present invention, by detecting the inlet water temperature, inlet ammonia nitrogen concentration, aerobic end ammonia nitrogen concentration, inlet total nitrogen concentration and anoxic end effluent nitrate nitrogen concentration, the dissolved oxygen (DO) and mixed liquor suspended solids (MLSS) of the biochemical section can be adjusted in time when the water quality of the AOA biochemical pool sewage inlet (incoming water) fluctuates, thereby greatly reducing the risk of pollutant indicators such as chemical oxygen demand, ammonia nitrogen, and total phosphorus in the treated effluent exceeding national or local emission standards due to fluctuations in the inlet water quality, thereby causing the effluent water quality to exceed the standard.

[0086] It should be noted that, in this embodiment, step S1 and step S2 are for controlling DO, and in this embodiment, step SS1 and step SS2 are for controlling MLSS;

[0087] The control of DO and the control of MLSS are carried out simultaneously.

[0088] In a specific implementation of this embodiment, the period T is 1 hour.

[0089] In a specific implementation of this embodiment, a first adjustment standard and a second adjustment standard for the aerobic end dissolved oxygen concentration corresponding to two different temperature ranges are preset;

[0090] Based on the concentration range of the detected influent ammonia nitrogen concentration, determine the corresponding aerobic end dissolved oxygen concentration adjustment target from the corresponding adjustment standard, and adjust the aerobic end dissolved oxygen concentration according to the determined concentration adjustment target; for influent ammonia nitrogen concentrations within the same concentration range, the aerobic end dissolved oxygen concentration adjustment target corresponding to the first adjustment standard shall be 1 mg / L lower than the aerobic end dissolved oxygen concentration adjustment target corresponding to the second adjustment standard;

[0091] When the inlet water temperature is detected to be greater than 15°C, the corresponding aerobic end dissolved oxygen concentration adjustment target is determined from the first adjustment standard according to the concentration range of the detected inlet ammonia nitrogen concentration;

[0092] When the inlet water temperature is detected to be less than 15° C., the corresponding aerobic undissolved oxygen concentration adjustment target is determined from the second adjustment standard according to the concentration range of the detected inlet water ammonia nitrogen concentration.

[0093] In the present invention, by setting two adjustment standards differentiated by temperature, different concentration adjustment targets are selected, thereby overcoming the activity of microorganisms in a low temperature environment and ensuring the normal progress of the treatment reaction.

[0094] In a specific implementation of this embodiment, the target range of the aerobic end dissolved oxygen concentration adjustment is 1-5 mg / L.

[0095] Please see the attached Figure 2 Table 1 provides a specific implementation of this embodiment. In the first adjustment standard, different concentration ranges of influent ammonia nitrogen concentration X correspond to different aerobic end dissolved oxygen concentration adjustment targets;

[0096] When the influent ammonia nitrogen concentration X is less than 30 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 2 mg / L;

[0097] When the influent ammonia nitrogen concentration X is greater than or equal to 30 mg / L and less than or equal to 40 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 3 mg / L;

[0098] When the influent ammonia nitrogen concentration X is greater than 40 mg / L and less than or equal to 49 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 3.5 mg / L;

[0099] When the influent ammonia nitrogen concentration X is greater than 49 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 4 mg / L.

[0100] Please see the attached Figure 3 Table 2 is provided. In a specific implementation of this embodiment, in the second adjustment standard, different concentration ranges of the influent ammonia nitrogen concentration X correspond to different aerobic end dissolved oxygen concentration adjustment targets;

[0101] When the influent ammonia nitrogen concentration X is less than 30 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 3 mg / L;

[0102] When the influent ammonia nitrogen concentration X is greater than or equal to 30 mg / L and less than or equal to 40 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 4 mg / L;

[0103] When the influent ammonia nitrogen concentration X is greater than 40 mg / L and less than or equal to 49 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 4.5 mg / L;

[0104] When the influent ammonia nitrogen concentration X is greater than 49 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 5 mg / L.

[0105] In a specific implementation of this embodiment, the step S2 further includes: (while adjusting the aerobic end dissolved oxygen concentration again) sending a reminder message;

[0106] Determine the adjustment method of the aerobic end dissolved oxygen according to the concentration range of the detected aerobic end effluent ammonia nitrogen concentration; and adjust the concentration of the aerobic end dissolved oxygen again according to the determined adjustment method of the aerobic end dissolved oxygen;

[0107] When the ammonia nitrogen concentration of the aerobic end effluent is less than 0.2 mg / L, the corresponding aerobic end dissolved oxygen is adjusted to decrease by 1 mg / L, and no reminder message is sent;

[0108] When the ammonia nitrogen concentration in the aerobic final effluent is greater than or equal to 0.2 mg / L and less than or equal to 0.6 mg / L, the corresponding aerobic final dissolved oxygen is adjusted to remain unchanged (maintained at the concentration corresponding to the concentration adjustment target of the first adjustment, or the concentration adjusted to after the first adjustment), and no reminder message is sent;

[0109] When the ammonia nitrogen concentration in the aerobic end effluent is greater than 0.6 mg / L and less than or equal to 1.2 mg / L, the corresponding aerobic end dissolved oxygen is adjusted to increase by 1 mg / L and a reminder message is sent;

[0110] When the ammonia nitrogen concentration in the aerobic effluent is greater than 1.2 mg / L, the corresponding aerobic dissolved oxygen is adjusted by increasing it by 1 mg / L and sending a reminder message.

[0111] In a specific implementation of this embodiment, the reminder information includes first reminder information indicating a general reminder and second reminder information indicating a serious reminder;

[0112] When the ammonia nitrogen concentration of the aerobic end effluent is greater than 0.6 mg / L and less than or equal to 1.2 mg / L, the corresponding aerobic end dissolved oxygen is adjusted to increase by 1 mg / L and the first reminder message is sent;

[0113] When the ammonia nitrogen concentration of the aerobic end effluent is greater than 1.2 mg / L, the corresponding adjustment method for the aerobic end dissolved oxygen is to increase it by 1 mg / L, and a second reminder message is sent.

[0114] In a specific implementation of this embodiment, the first reminder information is a light reminder;

[0115] The second reminder information is one or more of sound, vibration, and light reminder. The light reminder form of the second reminder information is different from the light reminder form of the first reminder information, such as brighter light, higher light flashing frequency, darker light color, etc.

[0116] In a specific implementation of this embodiment, when toxic substances (such as heavy metals) appear in the sewage inlet of the AOA biochemical pool, conventional detection cannot identify them (normally treated sewage effluent cannot ensure the removal of toxic substances), and manual intervention is required.

[0117] For example, the application equipment includes: inlet ammonia nitrogen meter, thermometer, aerobic end ammonia nitrogen meter, dissolved oxygen meter, inlet pump, inlet flow meter, inlet electric valve, controller, etc.

[0118] In a specific implementation of this embodiment, the step S2 further includes: step S3, presetting a control value of aerobic end dissolved oxygen;

[0119] According to the comparison between the preset control value of aerobic end dissolved oxygen and the detected actual value of aerobic end dissolved oxygen, the total air valve opening and the blower frequency are adjusted to adjust the aeration air volume.

[0120] In a specific implementation of this embodiment, a wind pressure gauge is installed on the fan main pipe to protect the blower, and the air release valve is regulated when the pressure exceeds a threshold.

[0121] In a specific implementation of this embodiment, the branch air valve is regulated according to the flow meter feedback value of the branch entering each O pool (each aerobic pool);

[0122] A wind pressure gauge is installed on the fan main to protect the blower and regulate the air relief valve when the pressure exceeds the threshold.

[0123] For example, the application equipment includes: blower, main air valve, total air volume meter, air pressure gauge, air release valve, air valves and air volume meters for each O-pool, controller, etc.

[0124] In a specific implementation of this embodiment, the volume ratio of the anaerobic tank, the aerobic tank and the anoxic tank of the AOA biochemical pool is 1:1:2.

[0125] Please see the attached Figure 4 Table 3 is provided. In a specific implementation of this embodiment, the step SS1 includes: determining an adjustment range of aerobic final sludge concentration based on the detected concentration range of the influent total nitrogen concentration Y; adjusting the aerobic final sludge concentration according to the determined adjustment range of the aerobic final sludge concentration;

[0126] When the total nitrogen concentration Y of the influent is less than 35 mg / L, the corresponding aerobic final sludge concentration range is 2800-3300 mg / L; more preferably 3000 mg / L;

[0127] When the total nitrogen concentration Y of the influent is greater than or equal to 35 mg / L and less than or equal to 42 mg / L, the corresponding aerobic final sludge concentration range is 3300-3800 mg / L; more preferably 3500 mg / L;

[0128] When the total nitrogen concentration Y of the influent is greater than 42 mg / L and less than or equal to 50 mg / L, the corresponding aerobic final sludge concentration range is 3800-4300 mg / L; more preferably 4000 mg / L;

[0129] When the total nitrogen concentration Y of the influent is greater than 50 mg / L, the corresponding aerobic terminal sludge concentration range is 4300-4800 mg / L; more preferably 4500 mg / L;.

[0130] In a specific implementation of this embodiment, the step SS2 further includes: while adjusting the concentration of aerobic terminal sludge again, sending a reminder message;

[0131] According to the concentration range of nitrate nitrogen in the anoxic final effluent detected, the adjustment method of the aerobic final sludge concentration is determined;

[0132] When the nitrate nitrogen concentration in the anoxic final effluent is less than 2 mg / L, the corresponding aerobic final sludge concentration is adjusted to decrease by 500 mg / L, and no reminder message is sent;

[0133] When the nitrate nitrogen concentration in the anoxic final effluent is greater than or equal to 2 mg / L and less than or equal to 6 mg / L, the corresponding aerobic final sludge concentration is adjusted to remain unchanged (maintained within the concentration range of the first adjustment, or adjusted to the concentration after the first adjustment), and no reminder message is sent;

[0134] When the nitrate nitrogen concentration in the anoxic final effluent is greater than 6 mg / L, the corresponding aerobic final sludge concentration is adjusted to increase by 500 mg / L and a reminder message is sent.

[0135] In a specific implementation of this embodiment, the reminder information includes third reminder information; the third reminder information is one or more of sound, vibration, and light reminder, and the form of the third reminder information is obviously different from the form of the first reminder information and the second reminder information (for example, different sound reminder content, different vibration frequency, different light flashing frequency, etc.);

[0136] When the nitrate nitrogen concentration in the anoxic final effluent is greater than 6 mg / L, the corresponding aerobic final sludge concentration is adjusted by increasing it by 500 mg / L, and a third reminder message is sent.

[0137] In a specific implementation of this embodiment, the comprehensive control method further includes, after step SS2: SS3, detecting the sludge concentration and sludge discharge status at a period T, and determining the sludge discharge control method;

[0138] The sludge status includes: higher than the control value, lower than the control value, higher than the control value and in an upward trend, and lower than the control value and in a downward trend;

[0139] The mud discharge status includes: mud discharge in progress and mud not discharged;

[0140] If the detected sludge concentration is higher than the control value and is in a state of not discharging sludge, control (open the sludge discharge valve) to start sludge discharge;

[0141] If the detected sludge concentration is higher than the control value and the sludge is being discharged, control (increase the opening of the sludge discharge valve) to increase the sludge discharge volume;

[0142] If the detected sludge concentration is lower than the control value and the sludge is being discharged, control (reduce the opening of the sludge discharge valve) to reduce the amount of sludge discharged or control (close the sludge discharge valve) to stop sludge discharge;

[0143] If the detected sludge concentration is higher than the control value and is on an upward trend, and is in a state where sludge is not discharged, control (open the sludge discharge valve) to start sludge discharge;

[0144] If the detected sludge concentration is higher than the control value and is on an upward trend, and the sludge is being discharged, control (increase the opening of the sludge discharge valve) to increase the sludge discharge volume;

[0145] If the detected sludge concentration is lower than the control value and is on a downward trend, and is in a state of sludge discharge, control (close the sludge discharge valve) to close the sludge discharge.

[0146] In a specific implementation of this embodiment, the rising trend means that the sludge concentration increases by 1000 mg / L in two adjacent periods T;

[0147] The downward trend means that the sludge concentration decreases by 1000 mg / L in two adjacent cycles T.

[0148] In a specific implementation of this embodiment, the adjustment gradient of increasing and decreasing the amount of mud discharged is ±0.2m 3 / h.

[0149] In a specific implementation of this embodiment, the single adjustment gradient of increasing the mud discharge volume is to increase the original mud discharge flow rate by 0.2m 3 / h;

[0150] The single adjustment gradient for reducing the amount of mud discharged is to reduce the original mud discharge flow by 0.2m 3 / h.

[0151] In a specific implementation of this embodiment, if the sludge discharge control method in step SS3 is performed for 6 hours and still cannot be controlled to meet the standard, the sludge return rate is controlled to be increased or decreased, and the adjustment range is 50%-150% (return ratio);

[0152] The adjustment interval is 6 hours, and the adjustment gradient is ±25%. After the sludge concentration is restored to the control value by adjusting the reflux rate, there will be no fluctuation within 2 hours, that is, the reflux ratio (the ratio between the reflux rate and the influent water volume) before the adjustment is restored.

[0153] For example, the required equipment includes: sludge discharge flow meter, sludge discharge electric valve, sludge return pump, sludge return flow meter, sludge return electric valve, controller, etc.

[0154] Please see the attached Figure 5 The present application also provides a comprehensive control device using the comprehensive control method of the AOA biochemical pool, the comprehensive control device comprising:

[0155] A feedforward data model acquisition unit obtains the inlet water temperature and inlet substance concentration of the biochemical pool to form a feedforward data model;

[0156] a feedforward model analysis and operation parameter concentration preset unit connected to the feedforward data model acquisition unit; analyzing the water temperature data (detected by the thermometer), the ammonia nitrogen concentration data (detected by the inlet ammonia nitrogen meter), the actual dissolved oxygen at the end of aerobic state (detected by the dissolved oxygen meter), the sludge concentration (detected by the sludge concentration meter), and the total nitrogen concentration data (detected by the total nitrogen inlet detector) in the model according to the feedforward data model, and determining the first adjustment control value (concentration adjustment target) of the dissolved oxygen at the end of aerobic state and the sludge concentration accordingly;

[0157] The feedback data model acquisition unit obtains the water substances and concentrations at the end of each AOA section in the biochemical pool to form a feedback data model;

[0158] A feedback model analysis and operation parameter concentration preset unit is connected to the feedback data model acquisition unit; according to the feedback data model, the aerobic end ammonia nitrogen (detected by the aerobic end ammonia nitrogen meter), the actual dissolved oxygen (detected by the dissolved oxygen meter), the sludge concentration (detected by the sludge concentration meter) and the anoxic end nitrate nitrogen data in the model are analyzed, and the aerobic end dissolved oxygen and sludge concentration are determined to adjust the control values again accordingly;

[0159] an aeration control unit connected to the feedforward model analysis and operation parameter concentration preset unit and the feedback model analysis and operation parameter concentration preset unit; comprising a fan and various control valves and flow meters on the aeration pipeline, and controlling and adjusting the valve opening or fan frequency by comparing the actual dissolved oxygen data at the end of aerobic state (detected by the dissolved oxygen meter) with the dissolved oxygen value determined in the first adjustment or re-adjustment of the control value, so that the actual value reaches the first adjustment or re-adjustment control value;

[0160] The sludge discharge and reflux control unit is connected to the feedforward model analysis and operation parameter concentration preset unit and the feedback model analysis and operation parameter concentration preset unit; it includes a sludge discharge and reflux pump, a control valve, a flow meter, etc., and adjusts the sludge discharge and reflux valve opening or the sludge discharge and reflux pump frequency by comparing the actual sludge concentration data at the end of aerobic treatment with the sludge concentration value preset in the first adjustment or re-adjustment control value, so that the actual value reaches the first adjustment or re-adjustment control value;

[0161] The alarm and manual intervention unit is connected to the feedforward model analysis and operating parameter concentration preset unit and the feedback model analysis and operating parameter concentration preset unit; when an abnormal situation occurs, such as the presence of toxic substances (such as heavy metal substances) in the incoming water, an alarm prompt is given, including sound, light and SMS notification (a channel is provided for manual setting of operating parameters).

[0162] In a specific implementation of this embodiment, the comprehensive control device specifically includes:

[0163] Influent ammonia nitrogen meter to measure the ammonia nitrogen concentration in the influent;

[0164] A thermometer to measure the inlet water temperature;

[0165] Aerobic final ammonia nitrogen meter for measuring the ammonia nitrogen concentration in the aerobic final effluent;

[0166] A dissolved oxygen meter to measure the dissolved oxygen concentration at the aerobic end;

[0167] Main controller, which receives, processes and issues control instructions;

[0168] Branch air valve, water inlet pump, water inlet flow meter and water inlet electric valve, blower, main air valve, total air flow meter and branch air flow meter, air pressure gauge, pressure relief air valve;

[0169] Influent total nitrogen detector to measure the total nitrogen concentration in influent;

[0170] Sludge concentration meter for measuring the concentration of aerobic terminal sludge;

[0171] Nitrate nitrogen detector for measuring nitrate nitrogen in anoxic end-effluent;

[0172] Sludge discharge flow meter, sludge discharge electric valve, sludge return pump, sludge return flow meter, sludge return electric valve, etc.

[0173] More specifically:

[0174] Take a water purification plant in the south (design scale 300,000 m 3 / d) of domestic sewage was taken as the research object, and the comprehensive control method provided in this application was applied to investigate the control situation and effluent effect under different conditions.

[0175] Implementation 1. When the inlet water temperature is 27.6℃ and the inlet ammonia nitrogen concentration is 30.35mg / L, the first adjustment is to control the aerobic end dissolved oxygen to 3.0mg / L; after the control value stabilizes, the aerobic end effluent ammonia nitrogen concentration is 0.18mg / L, and the aerobic end dissolved oxygen is controlled to 2.0mg / L again (the adjustment method is to reduce 1mg / L); the aerobic end dissolved oxygen is reduced by reducing the total air valve opening, and the branch air valve is adjusted in real time to ensure equal aeration; after the control value stabilizes, the aerobic end effluent ammonia nitrogen concentration is 0.25mg / L. The inlet total nitrogen concentration is 39.27mg / L, and the first adjustment is to control the aerobic end sludge concentration to 3500mg / L (3300-3800mg / L). Since the aerobic end sludge concentration in the reactor is 4135mg / L at this time, and sludge is being discharged (0.1m 3 / h), so the mud discharge electric valve opening is increased to increase the mud discharge volume to 0.3m 3 / h; after the control value stabilized, the nitrate nitrogen content in the anoxic effluent was 2.62 mg / L, which was within the target value (the adjustment method was to maintain the same without adjustment).

[0176] Implementation Case 2: The inlet water temperature was 28.9°C, and the inlet ammonia nitrogen concentration was 41.19 mg / L. The first adjustment controlled the aerobic end dissolved oxygen to 3.5 mg / L. Since the aerobic end dissolved oxygen concentration in the reactor was 1.0 mg / L at this time, the aerobic end dissolved oxygen was increased by increasing the main air valve opening and the fan frequency, and the branch air valves were adjusted in real time to ensure equal aeration. After the control value stabilized, the aerobic end effluent ammonia nitrogen concentration was 0.16 mg / L. Another adjustment (adjustment method was to reduce it by 1 mg / L) controlled the aerobic end dissolved oxygen to 2.5 mg / L. The aerobic end dissolved oxygen was reduced by reducing the main air valve opening and the fan frequency, and the branch air valves were adjusted in real time to ensure equal aeration. After the control value stabilized, the aerobic end effluent ammonia nitrogen concentration was 0.28 mg / L, which was within the target value (the adjustment method was to maintain it unchanged without adjustment). The total nitrogen concentration of the influent is 46.08 mg / L. The first adjustment is to control the aerobic sludge concentration to 4000 mg / L (3800-4300 mg / L). At this time, the aerobic sludge concentration in the reactor is 3465 mg / L and the sludge is being discharged (0.2m 3 / h), so the sludge discharge electric valve was closed to increase the sludge concentration; after the control value stabilized, the nitrate nitrogen in the anoxic effluent was 3.79 mg / L, which was within the target value (the adjustment method was to maintain unchanged without adjustment).

[0177] Implementation situation 3: The inlet water temperature is 30.4℃, and the inlet water ammonia nitrogen concentration is 49.23 mg / L. The first adjustment controls the aerobic end dissolved oxygen to 4.0 mg / L. Since the aerobic end dissolved oxygen concentration in the reactor is 2.0 mg / L at this time, the aerobic end dissolved oxygen is increased by increasing the total air valve opening and increasing the fan frequency. After the control value stabilizes, the aerobic end effluent ammonia nitrogen concentration is 0.58 mg / L at this time. The aerobic end effluent ammonia nitrogen is within the target value, and the adjustment method for the second adjustment is to maintain it unchanged without making any adjustment. The total nitrogen concentration of the influent was 55.73 mg / L. The first adjustment controlled the aerobic final sludge concentration to 4500 mg / L (4300-4800 mg / L). At this time, the aerobic final sludge concentration in the reactor was 4265 mg / L, and no sludge was discharged. When the sludge concentration steadily increased to 4673 mg / L, the nitrate nitrogen in the anoxic final effluent was 6.24 mg / L. The aerobic final sludge concentration was adjusted again to 5000 mg / L (4800-5300 mg / L). When the sludge concentration stabilized to the control value, the nitrate nitrogen in the anoxic final effluent was 4.37 mg / L, which was within the target value (the adjustment method was to maintain unchanged without adjustment).

[0178] Implementation Case 4: The inlet water temperature was 30.9°C, the inlet ammonia nitrogen concentration was 53.43 mg / L, and the total nitrogen concentration was 59.77 mg / L. At this point, the inlet ammonia nitrogen concentration exceeded the design inlet water standards by approximately 48%, and the inlet total nitrogen concentration exceeded the design inlet water standards by approximately 25%. The control device alerted the operator, requiring manual intervention. Upon receiving the alarm, the operator increased the aerobic end dissolved oxygen to 5 mg / L by increasing the main air valve opening and fan frequency. The aerobic end sludge concentration was increased to 5000 mg / L (4800-5300 mg / L) by closing the sludge discharge and increasing the sludge return ratio (+25%). After the actual values stabilized within the control range, the aerobic end effluent ammonia nitrogen concentration was 0.49 mg / L, and the anoxic end effluent nitrate nitrogen concentration was 6.79 mg / L. The operating personnel further increased the aerobic terminal sludge concentration to 5500 mg / L (5300-5800 mg / L). After the actual value stabilized within the control value range, the nitrate nitrogen in the anoxic terminal effluent was 5.39 mg / L, which was within the target value.

[0179] Based on the above experiments, it can be concluded that the comprehensive control method of the present application can adjust DO and MLSS in advance when there is fluctuation in the influent, and further optimize the two parameters according to the aerobic end-effluent ammonia nitrogen and the anoxic end-effluent nitrate nitrogen to achieve the best control value, while ensuring the stability of the effluent water quality and reducing the treatment energy consumption. At the same time, when an abnormal situation occurs, it can be handled through manual intervention, which greatly reduces the risk of the effluent water quality exceeding the standard.

[0180] Specifically, comparative examples are also provided:

[0181] Take a water purification plant in the south (design scale 300,000 m 3 / d) domestic sewage was the research object;

[0182] Comparative Example 1: When the inlet water temperature is 28.3°C, the inlet ammonia nitrogen concentration is 29.37 mg / L, and the inlet total nitrogen concentration is 36.25 mg / L, the conventional dissolved oxygen control method is adopted: when the dissolved oxygen is controlled at a higher value (3 mg / L), the ammonia nitrogen concentration of the aerobic end effluent is 0.09 mg / L, and the total aeration air volume is 33.7 m 3 / h; Under similar inlet conditions (inlet temperature of 28.6 ° C, inlet ammonia nitrogen concentration of 30.04 mg / L, inlet total nitrogen concentration of 37.13 mg / L), the comprehensive control method provided by this application is used for control, and the aerobic end dissolved oxygen concentration is determined to be 2.0 mg / L, the aerobic end effluent ammonia nitrogen concentration is 0.18 mg / L, and the total aeration air volume is 28.4m 3 The ammonia nitrogen content of the aerobic effluent of the two control methods was within the target value, but the use of this comprehensive control method can significantly reduce the fan energy consumption.

[0183] Comparative Example 2: When the inlet water temperature is 30.7°C, the inlet ammonia nitrogen concentration is 46.43 mg / L, and the inlet total nitrogen concentration is 52.11 mg / L, the conventional sludge concentration control method is adopted: that is, when the sludge concentration is controlled according to the effluent water quality and the experience of the operator, after the effluent total nitrogen begins to increase, the sludge concentration is increased. However, due to the slow increase in sludge concentration, the effluent total nitrogen has exceeded the internal control target value and reached 7.26 mg / L. In order to ensure that the effluent total nitrogen meets the standard, the carbon source is added at this time. After the addition of the carbon source, the effluent total nitrogen gradually increases. The sludge concentration gradually stabilized at 5.86 mg / L. Under similar influent conditions (influent temperature of 30.5°C, influent ammonia nitrogen concentration of 45.92 mg / L, and influent total nitrogen concentration of 53.26 mg / L), the comprehensive control method provided in the present application was used for control. When the influent total nitrogen concentration was detected to be 53.26 mg / L, the control began to increase the sludge concentration, and the sludge concentration control value was optimized according to the anoxic end-effluent nitrate nitrogen data. The anoxic end-effluent nitrate nitrogen was 4.56 mg / L, which was stable within the target value.

[0184] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments using the above technical content without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A comprehensive control method for an AOA biochemical pool, characterized in that: The comprehensive control method comprises: Control of DO: S1. Detecting the inlet ammonia nitrogen concentration and the inlet water temperature at a period T of 0.5-1.5 hours; Adjust the concentration of aerobic dissolved oxygen according to the detected influent ammonia nitrogen concentration and influent temperature; S2. After the adjustment in step S1 is completed, the ammonia nitrogen concentration of the aerobic end effluent is detected in real time; According to the real-time detected ammonia nitrogen concentration of the aerobic end effluent, the aerobic end dissolved oxygen concentration is readjusted; wherein, the single adjustment gradient of the aerobic end dissolved oxygen concentration is readjusted to ±1mg / L; Control of MLSS: SS1, detect the total nitrogen concentration of the influent at a period of T; Adjust the concentration of aerobic final sludge according to the detected total nitrogen concentration of the influent; SS2. After the adjustment in step SS1 is completed, the nitrate nitrogen concentration in the anoxic effluent is detected in real time; According to the real-time detected nitrate nitrogen concentration of the anoxic terminal effluent, the aerobic terminal sludge concentration is readjusted; wherein, the single adjustment gradient of the aerobic terminal sludge concentration is readjusted to ±500 mg / L.

2. The comprehensive control method of an AOA biochemical pool according to claim 1, characterized in that: There are preset first and second adjustment standards for aerobic dissolved oxygen concentration corresponding to two different temperature ranges; Based on the concentration range of the detected influent ammonia nitrogen concentration, determine the corresponding aerobic end dissolved oxygen concentration adjustment target from the corresponding adjustment standard, and adjust the aerobic end dissolved oxygen concentration according to the determined concentration adjustment target; for influent ammonia nitrogen concentrations within the same concentration range, the aerobic end dissolved oxygen concentration adjustment target corresponding to the first adjustment standard shall be 1 mg / L lower than the aerobic end dissolved oxygen concentration adjustment target corresponding to the second adjustment standard; When the inlet water temperature is detected to be greater than 15°C, the corresponding aerobic end dissolved oxygen concentration adjustment target is determined from the first adjustment standard according to the concentration range of the detected inlet ammonia nitrogen concentration; When the inlet water temperature is detected to be less than 15° C., the corresponding aerobic undissolved oxygen concentration adjustment target is determined from the second adjustment standard according to the concentration range of the detected inlet water ammonia nitrogen concentration.

3. The comprehensive control method of an AOA biochemical pool according to claim 2, characterized in that: In the first adjustment standard, different concentration ranges of influent ammonia nitrogen concentration correspond to different aerobic end dissolved oxygen concentration adjustment targets; When the influent ammonia nitrogen concentration is less than 30 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 2 mg / L; When the influent ammonia nitrogen concentration is greater than or equal to 30 mg / L and less than or equal to 40 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 3 mg / L; When the influent ammonia nitrogen concentration is greater than 40 mg / L and less than or equal to 49 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 3.5 mg / L; When the influent ammonia nitrogen concentration is greater than 49 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 4 mg / L.

4. The comprehensive control method of an AOA biochemical pool according to claim 2, characterized in that: In the second adjustment standard, different concentration ranges of influent ammonia nitrogen concentration correspond to different aerobic end dissolved oxygen concentration adjustment targets; When the influent ammonia nitrogen concentration is less than 30 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 3 mg / L; When the influent ammonia nitrogen concentration is greater than or equal to 30 mg / L and less than or equal to 40 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 4 mg / L; When the influent ammonia nitrogen concentration is greater than 40 mg / L and less than or equal to 49 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 4.5 mg / L; When the influent ammonia nitrogen concentration is greater than 49 mg / L, the corresponding aerobic dissolved oxygen concentration adjustment target is 5 mg / L.

5. The comprehensive control method of an AOA biochemical pool according to claim 1, characterized in that: The step S2 further includes: adjusting the aerobic end dissolved oxygen concentration again and sending a reminder message; According to the concentration range of the detected aerobic end effluent ammonia nitrogen concentration, determine the adjustment method of the aerobic end dissolved oxygen; according to the determined adjustment method of the aerobic end dissolved oxygen, adjust the concentration of the aerobic end dissolved oxygen again; When the ammonia nitrogen concentration of the aerobic end effluent is less than 0.2 mg / L, the corresponding adjustment method for the aerobic end dissolved oxygen is to reduce it by 1 mg / L; When the ammonia nitrogen concentration of the aerobic end effluent is greater than or equal to 0.2 mg / L and less than or equal to 0.6 mg / L, the corresponding adjustment method for the aerobic end dissolved oxygen is to maintain it unchanged; When the ammonia nitrogen concentration in the aerobic end effluent is greater than 0.6 mg / L and less than or equal to 1.2 mg / L, the corresponding aerobic end dissolved oxygen is adjusted to increase by 1 mg / L and a reminder message is sent; When the ammonia nitrogen concentration in the aerobic effluent is greater than 1.2 mg / L, the corresponding aerobic dissolved oxygen is adjusted by increasing it by 1 mg / L and sending a reminder message.

6. The comprehensive control method of an AOA biochemical pool according to claim 1, characterized in that: The step SS1 comprises: determining an adjustment range of aerobic terminal sludge concentration according to the detected influent total nitrogen concentration range; When the total nitrogen concentration in the influent is less than 35 mg / L, the corresponding aerobic final sludge concentration range is 2800-3300 mg / L; When the total nitrogen concentration in the influent is greater than or equal to 35 mg / L and less than or equal to 42 mg / L, the corresponding aerobic final sludge concentration range is 3300-3800 mg / L; When the total nitrogen concentration in the influent is greater than 42 mg / L and less than or equal to 50 mg / L, the corresponding aerobic final sludge concentration range is 3800-4300 mg / L; When the total nitrogen concentration of the influent is greater than 50 mg / L, the corresponding aerobic terminal sludge concentration range is 4300-4800 mg / L.

7. The comprehensive control method of an AOA biochemical pool according to claim 1, characterized in that: The step SS2 further includes: adjusting the concentration of aerobic final sludge again and sending a reminder message; According to the concentration range of nitrate nitrogen in the anoxic final effluent detected, the adjustment method of the aerobic final sludge concentration is determined; When the nitrate nitrogen concentration in the anoxic final effluent is less than 2 mg / L, the corresponding aerobic final sludge concentration is adjusted to reduce by 500 mg / L; When the nitrate nitrogen concentration in the anoxic final effluent is greater than or equal to 2 mg / L and less than or equal to 6 mg / L, the corresponding aerobic final sludge concentration is adjusted to remain unchanged; When the nitrate nitrogen concentration in the anoxic final effluent is greater than 6 mg / L, the corresponding aerobic final sludge concentration is adjusted to increase by 500 mg / L and a reminder message is sent.

8. A comprehensive control method for an AOA biochemical pool according to any one of claims 1 to 7, characterized in that: The comprehensive control method further includes: SS3, detecting sludge concentration and sludge discharge status at a period T, and determining a control method.

9. The comprehensive control method of an AOA biochemical pool according to claim 8, characterized in that: The sludge status includes: higher than the control value, lower than the control value, higher than the control value and in an upward trend, and lower than the control value and in a downward trend; The mud discharge status includes: mud discharge in progress and mud not discharged; If the detected sludge concentration is higher than the control value and is in a state of not discharging sludge, the control starts to discharge sludge; If the detected sludge concentration is higher than the control value and the sludge is being discharged, the sludge discharge volume will be increased; If the detected sludge concentration is lower than the control value and the sludge is being discharged, the sludge discharge volume is controlled to be reduced or the sludge discharge is controlled to be closed; If the detected sludge concentration is higher than the control value and is on an upward trend, and is in a state where sludge is not discharged, the control starts sludge discharge; If the detected sludge concentration is higher than the control value and is on an upward trend, and the sludge is being discharged, the sludge discharge volume will be increased; If the detected sludge concentration is lower than the control value and is on a downward trend, and the sludge is being discharged, the sludge discharge is controlled to be closed.

10. A comprehensive control device for an AOA biochemical pool, using the comprehensive control method for an AOA biochemical pool according to any one of claims 1 to 9, characterized in that: The comprehensive control device includes: a feedforward data model acquisition unit, a feedforward model analysis and operation parameter concentration preset unit, a feedback data model acquisition unit, a feedback model analysis and operation parameter concentration preset unit, an aeration control unit, and a sludge discharge and reflux control unit; The aeration control unit is connected to the feedforward model analysis and operation parameter concentration preset unit and the feedback model analysis and operation parameter concentration preset unit; The sludge discharge and reflux control unit is connected to the feedforward model analysis and operation parameter concentration preset unit and the feedback model analysis and operation parameter concentration preset unit.

Images