Iceas sewage treatment process control method, device and medium

Abstract

The application discloses an ICEAS sewage treatment process control method, equipment and medium, and relates to the field of sewage treatment process control. The method comprises the following steps: step S101, uniform distribution of water quantity and water inlet sedimentation control; step S102, PLC control of water inlet and water decanting control; step S103, water inlet stirring control; and step S104, water inlet ammonia nitrogen and water inlet aeration control. The sewage treatment is periodically carried out by the ICEAS biochemical system through the cyclic execution of steps S101-S104. The method can reduce the labor intensity of operators and the power consumption cost.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and in particular relates to a process control method for ICEAS wastewater treatment process. Background Technology

[0002] Intermittent Cycle Extended Aeration (ICEAS) evolved from the Sequencing Batch Reactor (SBR). It divides a single SBR reactor into two parts along its length: a pre-reaction zone at the front and a main reaction zone at the rear. The pre-reaction zone not only regulates the water flow but also acts as a selector to suppress sludge bulking.

[0003] Traditional ICEAS processes employ a continuous influent and intermittent effluent operation mode per tank, typically with a cycle time of 288 minutes. This includes 60 minutes of influent sedimentation, 60 minutes of influent decanting, 48 minutes of influent mixing, and 120 minutes of influent aeration. The functions of each stage are as follows: A) Influent mixing stage: Primarily provides an anaerobic / anoxic environment for microorganisms. Microorganisms in the activated sludge utilize the organic matter in the influent for anaerobic phosphorus release and anoxic denitrification. B) Influent aeration stage: Primarily provides an aerobic environment for microorganisms. Under aerobic conditions, microorganisms in the activated sludge oxidize organic matter to carbon dioxide and ammonia nitrogen to nitrate nitrogen, while also performing aerobic phosphorus uptake. C) Influent sedimentation stage: Primarily provides a sedimentation environment. Aeration and mixing are stopped at this stage, allowing the activated sludge to settle and achieve sludge-water separation. D) Influent decanting stage: The decanting system begins operation, discharging treated clean water into the next treatment unit while simultaneously sending the remaining sludge to the sludge treatment unit for dewatering. After decanting, the next cycle begins, and through different stages of circulation, the wastewater is purified.

[0004] Conventional ICEAS processes only control the time within a cycle, lacking control over process parameters. This means they cannot adjust the time allocation and aeration rate of each stage in a timely manner based on real-time changes in influent and effluent concentrations, resulting in low intelligence. Real-time parameter adjustments require 24-hour on-site monitoring by professionals who adjust operating parameters according to actual conditions, leading to inefficiency, high dependence on professional personnel, and hindering energy conservation and emission reduction. This also fails to meet the requirements for improving quality and efficiency, reducing pollution and carbon emissions, and achieving high-quality development. To address the shortcomings of traditional ICEAS process control, Chinese patent CN202010483154.6 discloses an optimized control method for reducing energy consumption in ICEAS wastewater treatment processes. However, this method suffers from uneven influent distribution, and the fuzzy aeration control relies too heavily on human experience and exhibits lag, resulting in low intelligence in ICEAS process control and hindering cost reduction and efficiency improvement.

[0005] In view of this, the present invention is hereby proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a process control method for ICEAS wastewater treatment, which can ensure uniform influent distribution and perform zoned PID control for aeration, thereby solving the above-mentioned technical problems existing in the operation of the existing ICEAS process.

[0007] The objective of this invention is achieved through the following technical solution: A process control method for ICEAS wastewater treatment, used in the ICEAS biological system for wastewater treatment in four stages: influent sedimentation, influent decanting, influent mixing, and influent aeration, includes: Step S101, Influent Sedimentation Control: At the beginning of the influent sedimentation stage, the opening duration of each influent valve is adjusted according to the influent height of each ICEAS biological tank in the previous cycle, and the influent volume of each ICEAS biological tank is controlled to keep the difference in influent height of all ICEAS biological tanks within 0.1m; at the beginning of the influent sedimentation stage, a valve closing time is preset by controlling the host computer of the ICEAS biological system. When sedimentation begins, the host computer closes the influent valve corresponding to the ICEAS biological tank in the influent sedimentation stage according to the preset valve closing time, so that the ICEAS biological tank does not receive water and is in a static sedimentation state. After the valve closing time is reached, the influent valve of the ICEAS biological tank is opened again. Step S102, Inlet and Decanting Control: A decanting delay valve closing time is preset by the host computer and controlled by the PLC controller according to the decanting delay valve closing time. The inlet valve of the ICEAS biological tank in the early stage of the inlet and decanting phase is opened. After the decanting delay valve closing time is reached at the end of the inlet and decanting phase, the inlet valve of the ICEAS biological tank is closed. Step S103, Water Inlet Stirring Control: The stirring delay duration and whether to activate the stirring delay control can be set through the host computer. When the stirring delay control is activated and takes effect, the stirring equipment is in the off state during the stirring delay duration. After the stirring delay duration ends, the stirring equipment of the ICEAS biological tank in the water inlet stirring stage is turned on. Step S104, Inlet Aeration Control: The host computer determines whether the inlet ammonia nitrogen exceeds the design value. If so, aeration control is not activated, and manual intervention is required to perform aeration at the maximum air volume and maximum aeration time. If not, aeration control is activated, and it is further determined whether the effluent ammonia nitrogen is greater than or equal to the warning value and less than or equal to the aeration control value. If not, an effluent ammonia nitrogen warning is issued. If so, aeration control is performed using a PID linkage control method that combines the target DO value of the effluent ammonia nitrogen zone with the aeration time segment, the fan frequency, and the frequency of the aeration branch pipe and the fan. The above steps S101 to S104 are repeated cyclically to treat the wastewater periodically by the ICEAS biochemical system.

[0008] A processing apparatus, comprising: At least one memory for storing one or more programs; At least one processor is capable of executing one or more programs stored in the memory, such that when the processor executes one or more programs, the processor can implement the method of the present invention.

[0009] A readable storage medium storing a computer program that, when executed by a processor, enables the implementation of the methods described in this invention.

[0010] Compared with the prior art, the ICEAS wastewater treatment process control method, equipment and medium provided by the present invention have the following beneficial effects: 1) By adjusting the opening duration of each inlet valve according to the inlet water height in each ICEAS biological tank during the inlet water sedimentation control step, the inlet water volume of each ICEAS biological tank can be controlled, and the inlet water volume of each ICEAS biological tank during the cycle can be evenly distributed. By closing the inlet valve according to the preset valve closing time during the inlet water sedimentation stage, no water enters during the sedimentation stage, which creates a static sedimentation environment and is conducive to improving the sedimentation effect.

[0011] 2) By using a PLC controller to control the decanting delay valve closing time in the water intake and decanting control steps, compared with time relay control, the valve closing time can be modified in time on the host computer operation interface, which improves work efficiency and can also eliminate the impact of continuous water intake causing the suspended solids to rise at the end of decanting.

[0012] 3) In the influent aeration control step, aeration control is achieved by using a target DO value and blower frequency in combination with effluent ammonia nitrogen zoning and aeration time segmentation, as well as PID linkage control between aeration branch pipes and blower frequency. This enables more precise control, reduces operating energy consumption, and avoids problems of insufficient or excessive aeration when influent water quality and quantity fluctuate greatly. Due to the addition of PID linkage control between blower frequency and DO, the "jump" of DO during the separate degradation of organic matter and ammonia nitrogen is avoided, which would cause the blower frequency to suddenly increase or decrease at a certain point in time. It can adjust the aeration volume in a timely manner according to changes in water quality and quantity, ensuring stable operation of the process and achieving cost reduction and efficiency improvement.

[0013] In summary, the method of this invention reduces the labor intensity of operators: the original control system required operators to adjust the fan frequency on the host computer system according to the operating conditions, while the improved fan frequency is automatically adjusted according to changes in DO value; it also reduces electricity costs: this method has been successfully applied in the first phase of the ICEAS process (design capacity 30,000 tons / day) of the Huangmei County Urban Wastewater Treatment Plant in Hubei Province. Before 2017, the electricity consumption per ton of water was 0.114 kWh / m³. 3 The control method was upgraded twice after the renovation. The first upgrade followed the method described in Chinese patent application CN202010483154.6, reducing the electricity consumption per ton of water to 0.108 kWh / m³. 3 The second upgrade using the method of this invention resulted in a water consumption of 0.097 kWh / m³. 3 The renovation will save nearly 200,000 yuan in electricity costs annually. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A flowchart of the ICEAS wastewater treatment process control method provided in an embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the ICEAS biochemical system used in the ICEAS wastewater treatment process control method provided in this embodiment of the invention.

[0017] Figure 3 A flowchart of the influent aeration control in the ICEAS wastewater treatment process control method provided in this embodiment of the invention.

[0018] In the diagram: 1-Inlet valve; 2-Sludge concentration meter; 3-Turbidity meter; 4-Inlet ammonia nitrogen meter; 5-Aeration branch pipe No. 1; 6-Aeration branch pipe No. 2; 7-Aeration branch pipe No. 3; 8-Aeration branch pipe No. 4; 9-Decanter; 10-Effluent ammonia nitrogen meter. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the specific content of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments, which do not constitute a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0020] First, the following explanations are provided for the terms that may be used in this article: The term "and / or" means that either or both can be achieved simultaneously. For example, X and / or Y means that it includes both "X" or "Y" as well as the three cases of "X and Y".

[0021] The terms "comprising," "including," "containing," "having," or other similar semantic descriptions should be interpreted as non-exclusive inclusion. For example, including a technical feature element (such as raw material, component, ingredient, carrier, dosage form, material, size, part, component, mechanism, device, step, process, method, reaction conditions, processing conditions, parameter, algorithm, signal, data, product or article of manufacture, etc.) should be interpreted as including not only the expressly listed technical feature element, but also other technical feature elements that are not expressly listed and are well-known in the art.

[0022] The term "composed of" excludes any technical features not expressly listed. When used in a claim, it closes the claim to exclude all technical features other than those expressly listed, except for associated conventional impurities. If the term appears only in a clause of a claim, it limits the claim to the elements expressly listed in that clause; elements recited in other clauses are not excluded from the overall claim.

[0023] Unless otherwise explicitly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this document according to the specific circumstances.

[0024] When concentration, temperature, pressure, size, or other parameters are expressed as numerical ranges, such ranges should be understood to specifically disclose all ranges formed by any pairing of upper limits, lower limits, or preferred values ​​within that range, regardless of whether the range is explicitly stated; for example, if the numerical range "2 to 8" is stated, then that range should be interpreted to include ranges such as "2 to 7", "2 to 6", "5 to 7", "3 to 4 and 6 to 7", "3 to 5 and 7", "2 and 5 to 7", etc. Unless otherwise stated, the numerical ranges described herein include both their endpoints and all integers and fractions within that range.

[0025] The terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” and “counterclockwise” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience and simplification of description and do not imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this document.

[0026] The solution provided by this invention will be described in detail below. Contents not described in detail in the embodiments of this invention are prior art known to those skilled in the art. Where specific conditions are not specified in the embodiments of this invention, they shall be performed according to conventional conditions in the art or conditions recommended by the manufacturer. Reagents or instruments used in the embodiments of this invention whose manufacturers are not specified are all conventional products that can be purchased commercially.

[0027] like Figure 1 As shown, this invention provides a process control method for ICEAS wastewater treatment, used in wastewater treatment within an ICEAS biological system that involves four stages: influent sedimentation, influent decanting, influent mixing, and influent aeration. The method includes: Step S101, Influent Sedimentation Control: At the beginning of the influent sedimentation stage, the opening duration of each influent valve is adjusted according to the influent height of each ICEAS biological tank in the previous cycle, controlling the influent volume of each ICEAS biological tank and keeping the influent height difference of all ICEAS biological tanks within 0.1m. This ensures uniform influent to each ICEAS biological tank. In the initial stage of the influent sedimentation stage, a valve closing time is preset by the host computer of the ICEAS biological system. At the start of sedimentation, the host computer closes the influent valve corresponding to the ICEAS biological tank in the influent sedimentation stage according to the preset valve closing time, keeping the ICEAS biological tank in a static sedimentation state without influent. After the valve closing time is reached, the influent valve of the ICEAS biological tank is reopened. This influent sedimentation control not only achieves uniform influent but also improves the sedimentation effect of the ICEAS process and enhances the effluent quality. Preferably, the preset valve closing time is generally 30 minutes. Step S102, Inlet and Decanting Control: A decanting delay valve closing time is preset by the host computer and controlled by the PLC controller according to the decanting delay valve closing time. The inlet valve of the ICEAS biological tank in the early stage of the inlet and decanting phase is opened. After the decanting delay valve closing time is reached at the end of the inlet and decanting phase, the inlet valve of the ICEAS biological tank is closed. Through such inlet and decanting control, the effect of the increase of suspended solids at the end of the decanting phase caused by continuous inlet water can be eliminated. Step S103, Inlet water stirring control: The stirring delay duration and whether to activate the stirring delay control can be set via the host computer. When the stirring delay control is activated and takes effect, the stirring equipment is in the off state during the stirring delay duration. After the stirring delay duration ends, the stirring equipment of the ICEAS biological tank in the inlet water stirring stage is turned on. Through such inlet water stirring control, the stirring equipment can be turned on or off according to the total nitrogen values ​​of the inlet and outlet water, which can save unnecessary stirring power consumption. Step S104, Inlet Aeration Control: The host computer determines whether the inlet ammonia nitrogen exceeds the design value. If so, aeration control is not activated, and manual intervention is required to perform aeration at maximum air volume and maximum aeration time. If not, aeration control is activated, and it is further determined whether the effluent ammonia nitrogen is greater than or equal to the warning value and less than or equal to the aeration control value. If not, an effluent ammonia nitrogen warning is issued. If so, aeration control is performed using a PID linkage control method that combines the target DO value of effluent ammonia nitrogen zoning with aeration time segmentation, fan frequency, and aeration branch pipe and fan frequency. Through such inlet aeration control, the operating conditions can be adjusted in a timely manner according to changes in water quality, and unnecessary stirring and aeration power consumption can be saved. The above steps S101 to S104 are repeated cyclically to treat the wastewater periodically by the ICEAS biochemical system.

[0028] Preferably, in step S101 of the above method, a level gauge is installed in each ICEAS biological tank. The level gauge is communicatively connected to the host computer. The host computer can monitor the level of each stage of each cycle, including the water inlet sedimentation stage, water inlet decanting stage, water inlet stirring stage, and water inlet control stage, through the level gauge in real time, and record each level. The water inlet height of each ICEAS biological tank is calculated based on the recorded levels. The difference in water inlet height between ICEAS biological tanks is determined based on the water inlet height of each ICEAS biological tank. If not, the opening time of the water inlet valve of the ICEAS biological tank with the larger water inlet height is adjusted, and the water inlet volume of the corresponding ICEAS biological tank is adjusted until the difference in water inlet height of all ICEAS biological tanks is controlled within 0.1m.

[0029] Preferably, in the above method, the duration of opening the inlet valve of the ICEAS biological treatment tank with a large inlet water height refers to: Based on the influent volume of each ICEAS biological tank, sort all ICEAS biological tanks, keep the opening time of the influent valve of the ICEAS biological tank with the smallest influent volume unchanged, and reduce the opening time of the influent valve of other ICEAS biological tanks with large influent height by the corresponding predetermined adjustment amount. The predetermined adjustment amount can be preset on the host computer.

[0030] For example, initially, all ICEAS biological tanks have their inlet valves fully open, with the opening time preset according to actual conditions, typically 90 seconds. When uneven water inflow is detected, for example, if the water inflow is ordered as follows: ICEAS biological tank 1 > ICEAS biological tank 2 > ICEAS biological tank 3 > ICEAS biological tank 4, the opening time of the inlet valve for ICEAS biological tank 4 (with the smallest inflow) remains unchanged. The opening time of the inlet valve for ICEAS biological tank 1 is reduced by 5 seconds, for ICEAS biological tank 2 by 3 seconds, and for ICEAS biological tank 3 by 1 second, until the difference in water inflow height between each ICEAS biological tank is within 0.1 meters. The adjustment amount of the opening time can be modified in the host computer operation interface. The adjustment of the inlet valve opening time is only made once at the beginning of each cycle.

[0031] Preferably, in step S101 of the above method, the preset valve closing time is less than the sedimentation time of the influent sedimentation stage.

[0032] Preferably, in step S102 of the above method, the PLC controller closes each inlet valve according to the control instruction of the host computer based on the decanting delay valve closing time.

[0033] Preferably, in step S104 of the above method, each ICEAS biological tank is provided with 4 aeration branch pipes, and the blower is connected to each ICEAS biological tank through the 4 aeration branch pipes. The 4 aeration branch pipes are aeration branch pipe No. 1, aeration branch pipe No. 2, aeration branch pipe No. 3 and aeration branch pipe No. 4.

[0034] Preferably, in step S104 of the above method, in the aeration control using a PID linkage control method that combines the target DO value of the effluent ammonia nitrogen zoning with the aeration time segmentation, the blower frequency, and the frequency of the aeration branch pipe and the blower, the effluent ammonia nitrogen zoning is performed according to the effluent ammonia nitrogen value in the following manner: The range of effluent ammonia nitrogen ≥4mg / L is designated as a warning zone; The effluent ammonia nitrogen range of 2.00–3.99 mg / L is designated as a risk zone; The range of effluent ammonia nitrogen from 1.00 to 1.99 mg / L is defined as the controllable zone. The range of effluent ammonia nitrogen ≤0.99mg / L is set as the low value zone; The following method is used for PID linkage control of effluent ammonia nitrogen levels, combined with aeration time segmentation, target DO values, blower frequency, and aeration branch pipe and blower frequency: If the effluent ammonia nitrogen zone is in the warning zone, aeration will not be delayed, the blower will run at the set maximum frequency of 37Hz, all aeration branch pipes will be opened, and none of them will be linked to the blower frequency control. Determine whether the effluent ammonia nitrogen zone is in the warning zone. If so, aeration will not be delayed, the blower will run at the set maximum frequency of 37Hz, all aeration branch pipes will be opened, and none of them will be linked to the blower frequency control. If not, effluent ammonia nitrogen feedback control will be re-implemented, and the control strategy corresponding to the effluent ammonia nitrogen zone will be executed according to the zone in which the effluent ammonia nitrogen is located. If the effluent ammonia nitrogen zone is determined to be in a risk zone, aeration will not be delayed, and the blower will be controlled by PID according to the different target DO values ​​set in the aeration time segment. The aeration branch pipe will be controlled in conjunction with the blower frequency. If not, effluent ammonia nitrogen feedback control will be re-implemented, and the control strategy corresponding to the effluent ammonia nitrogen zone will be executed according to the zone in which the effluent ammonia nitrogen is located. If the effluent ammonia nitrogen zone is determined to be within a controllable zone, then the aeration time is extended, and the blower is controlled by PID according to the different target DO values ​​set in the aeration time segment, and the aeration branch pipe is controlled in linkage according to the blower frequency; otherwise, the effluent ammonia nitrogen feedback control is re-implemented, and the control strategy corresponding to the effluent ammonia nitrogen zone is executed according to the zone in which the effluent ammonia nitrogen is located. If the effluent ammonia nitrogen zone is determined to be in a low value zone, then the aeration time is delayed, the blower operates at the set minimum frequency, only aeration branch pipes No. 2 and No. 3 are turned on, the other aeration branch pipes are not involved in the linkage control shutdown, and all aeration branch pipes are not linked to the blower frequency control; if not, then the effluent ammonia nitrogen feedback control is re-implemented, and the control strategy corresponding to the zone where the effluent ammonia nitrogen is located is executed.

[0035] Preferably, in the above method, if the effluent ammonia nitrogen zone is in a risk zone, aeration is not delayed. The blower is controlled by PID according to different target DO values ​​set in the aeration time segments. In the linkage control of the aeration branch pipe according to the blower frequency, the aeration time is divided into three segments: 0-30 min, 30-60 min, and 60-120 min. The target DO value corresponding to the 0-30 min segment is 0.5 mg / L, and the corresponding maximum blower frequency is 30 Hz. The target DO value corresponding to the 30-60 min segment is 1.0 mg / L, and the corresponding maximum blower frequency is 35 Hz. The target DO value corresponding to the 60-120 min segment is 1.5 mg / L, and the corresponding maximum blower frequency is 40 Hz. The P value for PID control is 0.2, the I value is 30, and the D value is 0. The DO dead zone is 0.3 mg / L; the initial frequency of the fan is 30 Hz. The aeration branch pipes are controlled in conjunction with the blower frequency in the following manner: When the fan frequency F is 23Hz≤F≤28Hz, close aeration branch pipe No. 1 and aeration branch pipe No. 4, and open aeration branch pipe No. 2 and aeration branch pipe No. 3. When the fan frequency F is 29Hz≤F≤36Hz, close aeration branch pipe No. 1 and open aeration branch pipe No. 2, No. 3 and No. 4. When the blower frequency F is 37Hz≤F, open all aeration branch pipes; In the above method, if the effluent ammonia nitrogen zone is in a controllable zone, the aeration time is delayed. The blower is controlled by PID according to different target DO values ​​set in the aeration time segments. The aeration branch pipe is linked to the blower frequency and the aeration time is divided into three segments: 0-30 min, 30-60 min, and 60-120 min. The target DO value corresponding to the 0-30 min segment is 0.5 mg to 3 mg / L, and the corresponding maximum blower frequency is 30 Hz. The target DO value corresponding to the 30-60 min segment is 10.0 mg to 8 mg / L, and the corresponding maximum blower frequency is 35 Hz. The target DO value corresponding to the 60-120 min segment is 1.5 mg to 2 mg / L, and the corresponding maximum blower frequency is 40 Hz. The P value for PID control is 0.4, the I value is 30, and the D value is 0. The DO dead zone is 0.2 mg / L; the initial frequency of the fan is 25 Hz. The aeration branch pipes are controlled in conjunction with the blower frequency in the following manner: When the fan frequency F is 23Hz≤F≤28Hz, open aeration branch pipe No. 2 and aeration branch pipe No. 3, and close aeration branch pipe No. 1 and aeration branch pipe No. 4. When the fan frequency F is 29Hz≤F≤36Hz, then open aeration branch pipe No. 2, aeration branch pipe No. 3 and aeration branch pipe No. 4, and close aeration branch pipe No. 1. When the blower frequency F is 37Hz≤F, then all aeration branch pipes are opened; Aeration delay is the duration of aeration in the next cycle. During the aeration delay, the blower is turned off and the agitator is turned on, so that the power density of agitation per ton of water is lower than the power density of aeration per ton of water. Each aeration delay is 10 minutes, with a maximum cumulative delay of 20 minutes. In the above method, the aeration delay for the effluent ammonia nitrogen zone in the low value zone is 10 minutes, with a cumulative maximum delay of 30 minutes, and the blower operates at the lowest set frequency of 23Hz.

[0036] Preferably, in the above method, the host computer is a WinCC host computer; In the water inlet and decanting stage control of step S102, the PLC controller controlling the drain valve obtains the decanting warning level, SS warning value and MLSS warning value through the host computer; if any one of the three warning values ​​is triggered during the drainage process, the drain valve is closed; otherwise, drainage is carried out according to the decanting delay time.

[0037] Preferably, the above method further includes: Each device is equipped with a sludge concentration meter, turbidity meter, influent ammonia nitrogen online meter, and effluent ammonia nitrogen online meter, all connected to a host computer for communication, enabling them to provide corresponding water measurement data to the host computer. The sludge concentration meter is installed 20cm below the lowest drainage level near the decanter. The sludge concentration meter is used to monitor the sludge concentration during the aeration stage and to monitor the sludge level in the buffer zone during the influent decanting stage. If the host computer determines that MLSS < 100 mg / L based on the sludge concentration meter, it will decan the ICEAS biological treatment tank in the influent decanting stage according to the preset decanting depth. If the MLSS does not meet the above conditions, the decanting of the ICEAS biological treatment tank will be stopped immediately, an early warning will be given and manual intervention will be required; this can prevent sludge from being carried in the effluent, which would lead to the effluent quality exceeding the standard. The turbidity meter is installed on the ICEAS outlet water main pipe to indicate the clarity of the outlet water. If the host computer determines that the SS in the effluent is <50mg / L based on the turbidity meter, it confirms that the effluent water quality is clear and decans the ICEAS biological treatment tank in the influent decanting stage according to the preset decanting depth; if it determines that the SS in the effluent does not meet the requirement of SS <50mg / L, it immediately stops the decanting of the ICEAS biological treatment tank, issues an early warning and prompts that manual intervention is required; this can prevent the effluent from carrying sludge and causing the effluent water quality to exceed the standard. The influent ammonia nitrogen online meter is installed on the ICEAS influent main pipe and is used to measure the influent ammonia nitrogen value; If the host computer determines that the influent ammonia nitrogen level is greater than the design value based on the online ammonia nitrogen meter, it will issue an early warning and prompt that manual intervention is required. The influent ammonia nitrogen online instrument is installed on the ICEAS effluent main pipe and is used to measure the effluent ammonia nitrogen value; If the host computer determines that the effluent ammonia nitrogen level is below the internal control standard based on the online instrument, it will decan the ICEAS biological treatment tank in the influent decanting stage at a preset decanting depth. If the effluent ammonia nitrogen level does not meet the internal control standard, it will immediately stop the decanting of the ICEAS biological treatment tank and issue an early warning indicating that manual intervention is required to prevent the discharge of water exceeding the standard into subsequent treatment units.

[0038] The above method combines the relationship between MLSS, turbidity meter, and influent and effluent water quality to control decanting depth and provide early warning of decanting water quality. The higher the decanting depth, the lower the liquid level during the aeration stage, the lower the air pressure of the Roots blower, and the lower the corresponding power consumption.

[0039] This invention also provides a processing apparatus, comprising: At least one memory for storing one or more programs; At least one processor is capable of executing one or more programs stored in the memory, such that when the processor executes one or more programs, the processor can implement the method of the present invention.

[0040] The present invention further provides a readable storage medium storing a computer program that, when executed by a processor, can implement the method described in the present invention.

[0041] In summary, the method of this invention can reduce the labor intensity of operators: the original control system required operators to adjust the fan frequency on the host computer system according to the operating conditions, while the improved fan frequency is automatically adjusted according to the change of DO value; it can also reduce electricity consumption costs: this method has been successfully applied in the first phase of the ICEAS process of the Huangmei County Urban Wastewater Treatment Plant in Hubei Province (design capacity of 30,000 tons / day). Before the renovation in 2017, the electricity consumption per ton of water was 0.114 kWh / m³. 3 The control method was upgraded twice after the renovation. The first upgrade followed the method described in Chinese patent application CN202010483154.6, reducing the electricity consumption per ton of water to 0.108 kWh / m³. 3 The second upgrade using the method of this invention resulted in a water consumption of 0.097 kWh / m³. 3 The renovation will save nearly 200,000 yuan in electricity costs annually.

[0042] To more clearly demonstrate the technical solution and its effects provided by the present invention, the following detailed description of the solution provided by the embodiments of the present invention is provided with reference to specific examples.

[0043] Example 1 like Figure 1 , Figure 2 As shown, this embodiment of the invention provides a process control method for ICEAS wastewater treatment, which effectively solves the problems of uneven influent distribution and over-reliance on human experience in fuzzy aeration control, as well as the lag in existing energy-saving optimization control methods for ICEAS wastewater treatment processes. This method further improves the intelligence level of ICEAS process control and better achieves cost reduction and efficiency improvement. The method includes the following steps: Step S101. Influent Sedimentation Control: This step is mainly used to evenly distribute the influent volume of each ICEAS biological treatment tank during the cycle and improve the sedimentation effect. Since the four ICEAS biological treatment tanks distribute water through a distribution channel, such as... Figure 1As shown, uneven water distribution exists, leading to differences in the required aeration, mixing, and decanting times for each ICEAS biological treatment tank, which is detrimental to process control. To address this, the system allows for the control of the opening and closing times of the ICEAS biological treatment tank inlet valves via a supervisory control and data acquisition (SCADA) system. These times can be preset on the SCADA interface. At the start of the cycle, i.e., when sedimentation begins, the system calculates the inlet water height for each ICEAS biological treatment tank within the previous cycle. Based on the difference in inlet water height, the system fine-tunes the opening duration of the inlet valves for each ICEAS biological treatment tank, thus controlling the flow of water in each tank. The system controls the influent flow rate to keep the difference in influent height between all ICEAS biological treatment tanks within 0.1m. Specifically, at the beginning of the influent sedimentation stage, the system compares the influent height (decanting start level - decanting end level) of each ICEAS biological treatment tank within the previous cycle. By fine-tuning the opening duration of the influent valve of each ICEAS biological treatment tank (the opening duration of the influent valve can be set by the host computer and can be fine-tuned), the system ensures that the influent flow rate distributed to each ICEAS biological treatment tank is uniform (the difference in influent height between each ICEAS biological treatment tank is controlled within 0.1m), and the water volume is uniform. When any ICEAS biological tank enters the influent sedimentation stage, in the initial stage of influent sedimentation, the system will completely close the influent valve corresponding to that ICEAS biological tank according to the valve closing time preset by the host computer (the valve closing time is generally 30 minutes, and the influent sedimentation time is 60 minutes). This keeps the ICEAS biological tank in a static sedimentation state without water intake during the sedimentation stage. After the valve closing time is reached, the influent valve of that ICEAS biological tank will be opened again. This creates a static sedimentation environment, which is beneficial to improving the sedimentation effect. At the same time, the water intake of other ICEAS biological tanks increases per unit time. By shortening the water intake duration in the reaction stage, this helps to improve the reaction rate in the reaction stage, shorten the actual aeration and stirring time, and save power consumption. After the valve closing time ends, the influent valve is opened, and influent sedimentation begins.

[0044] Step S102. Inlet and Decanting Control: The host computer system has enabled a decanting delay valve closing time. The valve closing time can be preset on the host computer operation interface. When any ICEAS biological tank enters the inlet and decanting stage, the system will delay the closing of the inlet valve of the ICEAS biological tank in the inlet and decanting stage according to the preset delay valve closing time (the delay valve closing time is less than the decanting time, and the preset time is generally 10 minutes at the end of the decanting stage). When the delay time is reached, the inlet valve of the corresponding ICEAS biological tank will be completely closed, so that the ICEAS biological tank is in a static decanting state without water intake. After the decanting stage is over, the inlet valve of the ICEAS biological tank will be opened again. This can reduce the impact of continuous water intake on the sludge floating and help ensure the final water quality. A sludge concentration meter is installed near the decanter, positioned 50cm below the lowest decanting level. This meter monitors sludge concentration during the aeration phase and the sludge level in the buffer zone during the settling and decanting phase. If the MLSS (Mixed Liquor Saturation) during decanting is <100 mg / L, it indicates a low sludge level and safe drainage. A turbidity meter is installed on the main effluent pipe to indicate water clarity. An SS (Self-Concentration Saturation) <50 mg / L indicates clear water. The relationship between MLSS, turbidity, and influent and effluent water quality is used to control decanting depth and provide early warnings about decanting water quality. Higher decanting depths result in lower aeration levels, lower Roots blower pressure, and lower power consumption.

[0045] Step S103. Influent Agitation Control System: Influent agitation primarily provides an anoxic mixing environment for denitrification. The host computer system has enabled influent agitation delay control logic. Users can select "Activate Influent Agitation Delay Control" and "Preset Activated Influent Agitation Delay Time" on the host computer interface. When influent agitation delay control is not activated, the agitator will remain on during the influent agitation phase. When influent agitation delay control is activated, the delay time control takes effect, and the agitator remains off during the delay period. After the delay period ends, the agitator in the ICEAS biological treatment tank during the influent agitation phase is activated again. Operators can choose whether to activate the delay control and set the delay time according to the actual situation. If a nitrification meter is added to the biological treatment effluent, precise control can be achieved by combining online influent data feedforward and nitrification meter feedback. Through this influent agitation control, the agitator can be activated or deactivated based on the total nitrogen values ​​of the influent and effluent, thus saving unnecessary agitation power consumption.

[0046] Step S104. Influent Aeration Control System: Primarily provides an aerobic environment for removing ammonia nitrogen and some organic matter. The host computer determines whether the influent ammonia nitrogen exceeds the design value. If so, aeration control is not activated, and manual intervention is required to perform aeration at maximum air volume and duration. If not, aeration control is activated, and the effluent ammonia nitrogen value is further determined. If the effluent ammonia nitrogen value is in the warning zone, the warning zone control strategy is implemented; if the effluent ammonia nitrogen value is in the risk zone, the risk zone control strategy is implemented; if the effluent ammonia nitrogen value is in the controllable zone, the controllable zone control strategy is implemented; if the effluent ammonia nitrogen value is in the low-value zone, the low-value zone control strategy is implemented. In the aeration delay strategy during the influent aeration control process, the activation of the aeration delay strategy can be selected based on the effluent total nitrogen data. When "yes" is selected, the blower does not work, but the agitator does; when "no" is selected, neither the blower nor the agitator works. Through influent ammonia nitrogen early warning control, effluent ammonia nitrogen zoning control, and aeration branch pipe control, the aeration time period is divided into three parts based on the original aeration fuzzy control. Each part is set with a target DO and upper and lower frequency limits. The blower frequency is controlled by PID based on the DO. This real-time PID control can adjust the aeration volume in a timely manner according to actual water quality changes, which is more conducive to energy saving and consumption reduction. When the influent ammonia nitrogen exceeds the warning value, the aeration delay is canceled, resulting in the longest aeration time and the largest air volume. When the influent ammonia nitrogen falls below the warning value, it is considered within the process tolerance range and the influent is assumed to be stable. Different interval strategies are implemented based on the effluent ammonia nitrogen range. The aeration delay extends the aeration time for the next cycle. During the delay period, the blower does not operate, but the agitator is activated. The power density of agitation per ton of water is lower than that of aeration per ton of water. Flexible allocation of actual aeration and agitation time is beneficial for enhancing the system's nitrogen and phosphorus removal functions while also achieving cost reduction and efficiency improvement. For detailed strategies, please refer to [link to specific strategies]. Figure 3 .

[0047] The above steps S101 to S104 are repeated cyclically to treat the wastewater periodically by the ICEAS biochemical system.

[0048] Furthermore, the host computer in the above method is a WinCC host computer. In the decanting stage of step S102, the PLC obtains the decanting warning level, SS warning value, and MLSS warning value through the WinCC host computer; if any one of the three warning values ​​is triggered during the drainage process, the drain valve is closed; otherwise, drainage is carried out according to the decanting delay time.

[0049] Furthermore, the above method also includes installing sludge concentration meters, turbidity meters, and online ammonia nitrogen meters for both influent and effluent. The sludge concentration meter is installed 20 cm below the lowest effluent level near the decanter. During the aeration stage, it can be used to monitor sludge concentration; during the sedimentation and decanting stage, it can be used to monitor the sludge level in the buffer zone, such as when the MLSS during the decanting stage is <100. mg / L indicates a low sludge level and safe drainage. A turbidity meter installed on the ICEAS effluent main pipe indicates the clarity of the water. For example, SS < 50 mg / L indicates clear water. The relationship between MLSS, turbidity meter readings, and influent and effluent water quality is used to control decanting depth and provide early warnings for decanting water quality. The higher the decanting depth, the lower the liquid level during the aeration stage, the lower the Roots blower pressure, and the lower the corresponding power consumption. Online ammonia nitrogen meters for influent and effluent are installed on the influent and effluent main pipes, respectively, to monitor the influent and effluent ammonia nitrogen values. All meters are connected to the host computer to provide water quality data.

[0050] Furthermore, the above method also includes setting up four aeration branch pipes, namely aeration branch pipe No. 1, aeration branch pipe No. 2, aeration branch pipe No. 3 and aeration branch pipe No. 4; the blower is connected to each ICEAS biological tank through the four aeration branch pipes.

[0051] Furthermore, in step S104 of the above method, the number of aeration branch pipes opened according to the fan frequency is as follows: When the fan frequency F is 23Hz≤F≤28Hz, open the two sets of aeration branch pipes No. 2 and No. 3, and close the aeration branch pipes No. 1 and No. 4. When the blower frequency F is 29Hz≤F≤36Hz, open the three sets of aerator branch pipes: aeration branch pipe No. 2, aeration branch pipe No. 3, and aeration branch pipe No. 4, and close aeration branch pipe No. 1. When the blower frequency F is 37Hz≤F, all aeration branch pipes are fully open, that is, all 4 aeration branch pipes are fully open.

[0052] In the above method, during the influent sedimentation control step, the influent volume of each ICEAS biological treatment tank is evenly distributed throughout the cycle, and the sedimentation effect is improved. Since the four ICEAS biological treatment tanks distribute water through a distribution channel, as shown... Figure 2As shown, there is an uneven distribution of influent, which leads to differences in the actual aeration, stirring, and decanting times required by each ICEAS biological treatment tank, making process control difficult. At the beginning of the influent sedimentation stage, the influent height of each ICEAS biological treatment tank in the previous cycle is compared, i.e., obtained by the decanting start level - decanting end level. By fine-tuning the opening duration of the influent valve of each ICEAS biological treatment tank (the opening duration of the influent valve is set by the host computer and can be finely adjusted), the influent volume distributed to each ICEAS biological treatment tank is ensured to be uniform (the difference in influent height between each ICEAS biological treatment tank is controlled within 0.1m).

[0053] In the above method, during the influent aeration control stage, aeration control is performed using zoned PID control, which is more precise and consumes less energy compared to fuzzy control. The ammonia nitrogen zone adjustment is divided into four zones: warning zone, risk zone, controllable zone, and low value zone. Compared to the existing method which is divided into three zones: warning zone, coarse adjustment zone, and fine adjustment zone, this method adds the operating conditions during the rainy season. Different zones have different control strategies and control parameters. The finer the zone, the more precise the control.

[0054] The above method adjusts the aeration time and fan frequency. Existing methods fine-tune the aeration time for the next cycle and the current fan frequency by adjusting the range corresponding to the effluent ammonia nitrogen value. Since the DO value is not used in conjunction with the fan frequency control, insufficient or excessive aeration may occur when the influent water quality and flow fluctuate significantly. The new control strategy adds PID linkage control of fan frequency and DO. Due to the significant concentration gradient in the SBR process, DO may "jump" during the separate degradation of organic matter and ammonia nitrogen, causing the fan frequency to suddenly increase or decrease at certain points in time. To avoid this and achieve more precise PID control, the aeration time period is divided into three stages: 0-30 min, 30-60 min, and 60-120 min. By setting different target DO and frequency limits for different time periods, the adverse effects caused by the "jump" of DO can be eliminated. The improved PID control can adjust the aeration volume in a timely manner according to changes in water quality and quantity, which can ensure the stable operation of the process and achieve cost reduction and efficiency improvement.

[0055] In the above method, during the decanting control phase, a PLC is used instead of a time relay for control. This allows for timely modification of the valve closing time and avoids the risk of time relay failure. The host computer program enables a decanting delay valve closing time. The inlet valve opens at the beginning of decanting, and closes during the final delay. This reduces the impact of continuous water intake on sludge uplift and helps ensure water quality at the end of the decanting process.

[0056] The control method of this invention mainly develops corresponding process control based on cycle time control, and is mainly divided into: 1. Influent sedimentation control; 2. Influent decanting control; 3. Influent stirring control; 4. Influent aeration control. The influent sedimentation strategy is implemented during the influent sedimentation stage, the influent decanting strategy during the influent decanting stage, the influent stirring strategy during the influent stirring stage, and the influent aeration strategy during the influent aeration stage, without interference between the stages. One cycle of the ICEAS process is preset to 288 minutes, which can be divided into four stages: influent sedimentation preset to 60 minutes, influent decanting preset to 48 minutes, influent stirring preset to 60 minutes, and influent aeration preset to 120 minutes. Water can be introduced at each stage, and water intake control can be activated as needed to adopt an intermittent water intake mode. To ensure the smooth execution of the time cycle, the preset time of the cycle and the preset time of each stage are fixed, but corresponding delay control can be set. During the delay control process, the corresponding equipment is in a non-working state. For example, the stirring equipment is in a non-working state during the water intake stirring delay, while the blower is in a non-working state during the aeration delay, but the agitator can work. Therefore, the actual aeration and stirring time can be adjusted according to the operating conditions, and the stirring and aeration time can be reasonably allocated, which is conducive to the stable operation of the system and avoids unnecessary energy waste.

[0057] The method of the present invention has at least the following advantages compared with the prior art:

[0058] 1) Reduce the labor intensity of operators: The original control system required operators to adjust the fan frequency on the host computer system according to the operating conditions. The improved fan frequency is automatically adjusted according to the change of DO value.

[0059] 2) Reduced electricity costs: This method has been successfully applied in the first phase of the ICEAS process at the Huangmei County Urban Wastewater Treatment Plant in Hubei Province (design capacity 30,000 tons / day). Before the upgrade in 2017, the electricity consumption per ton of water was 0.114 kWh / m³. 3 The control method was upgraded twice after the renovation. The first upgrade reduced the electricity consumption per ton of water to 0.108 kWh / m³. 3 (During the original patent period), the second upgrade resulted in a water and electricity consumption of 0.097 kWh / m³. 3 (After the patent improvement), nearly 200,000 yuan in electricity costs can be saved annually before and after the renovation.

[0060] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims. The information disclosed in the background section is intended only to enhance the understanding of the overall background technology of the present invention and should not be construed as an admission or implication in any way that such information constitutes prior art known to those skilled in the art.

Claims

1. A process control method for ICEAS wastewater treatment, used in wastewater treatment of the ICEAS biological system in four stages: influent sedimentation, influent decanting, influent mixing, and influent aeration, characterized in that, include: Step S101, Influent Sedimentation Control: At the beginning of the influent sedimentation stage, the opening duration of each influent valve is adjusted according to the influent height of each ICEAS biological tank in the previous cycle, and the influent volume of each ICEAS biological tank is controlled to keep the difference in influent height of all ICEAS biological tanks within 0.1m; at the beginning of the influent sedimentation stage, a valve closing time is preset by controlling the host computer of the ICEAS biological system. When sedimentation begins, the host computer closes the influent valve corresponding to the ICEAS biological tank in the influent sedimentation stage according to the preset valve closing time, so that the ICEAS biological tank does not receive water and is in a static sedimentation state. After the valve closing time is reached, the influent valve of the ICEAS biological tank is opened again. The opening duration of each inlet valve is adjusted in the host computer operation interface, and it is only adjusted once at the beginning of each cycle. Step S102, Inlet and Decanting Control: A decanting delay valve closing time is preset by the host computer and controlled by the PLC controller according to the decanting delay valve closing time. The inlet valve of the ICEAS biological tank in the early stage of the inlet and decanting phase is opened. After the decanting delay valve closing time is reached at the end of the inlet and decanting phase, the inlet valve of the ICEAS biological tank is closed. Step S103, Water Inlet Stirring Control: The stirring delay duration and whether to activate the stirring delay control can be set through the host computer operation interface. The stirrer will be on during the water inlet stirring stage. When the stirring delay control is activated and takes effect, the stirring equipment will be in the off state during the stirring delay duration. After the stirring delay duration ends, the stirring equipment of the ICEAS biological tank in the water inlet stirring stage will be turned on. Step S104, Inlet Aeration Control: The host computer determines whether the inlet ammonia nitrogen exceeds the design value. If so, aeration control is not activated, and manual intervention is required to perform aeration at the maximum air volume and maximum aeration time. If not, aeration control is activated, and it is further determined whether the effluent ammonia nitrogen is greater than or equal to the warning value and less than or equal to the aeration control value. If not, an effluent ammonia nitrogen warning is issued. If so, aeration control is performed using a PID linkage control method that combines the target DO value of the effluent ammonia nitrogen zone with the aeration time segment, the fan frequency, and the frequency of the aeration branch pipe and the fan. Each ICEAS biological tank is equipped with 4 aeration branch pipes. The blower is connected to each ICEAS biological tank through the 4 aeration branch pipes. The 4 aeration branch pipes are aeration branch pipe No. 1, aeration branch pipe No. 2, aeration branch pipe No. 3 and aeration branch pipe No.

4. In step S104, the aeration control is performed using a PID linkage control method that combines the target DO value of the effluent ammonia nitrogen zoning with the aeration time segmentation, the blower frequency, and the frequency of the aeration branch pipe and the blower. The effluent ammonia nitrogen is zoned according to the following method based on the effluent ammonia nitrogen value: The range of effluent ammonia nitrogen ≥4mg / L is designated as a warning zone; The effluent ammonia nitrogen range of 2.00–3.99 mg / L is designated as a risk zone; The range of effluent ammonia nitrogen from 1.00 to 1.99 mg / L is defined as the controllable zone. The range of effluent ammonia nitrogen ≤0.99mg / L is set as the low value zone; The following method is used for PID linkage control of effluent ammonia nitrogen levels, combined with aeration time segmentation, target DO values, blower frequency, and aeration branch pipe and blower frequency: If the effluent ammonia nitrogen zone is in the warning zone, aeration will not be delayed, the blower will run at the set maximum frequency of 37Hz, all aeration branch pipes will be opened, and none of them will be linked to the blower frequency control. Determine whether the effluent ammonia nitrogen zone is in the warning zone. If so, aeration will not be delayed, the blower will run at the set maximum frequency of 37Hz, all aeration branch pipes will be opened, and none of them will be linked to the blower frequency control. If not, effluent ammonia nitrogen feedback control will be re-implemented, and the control strategy corresponding to the effluent ammonia nitrogen zone will be executed according to the zone in which the effluent ammonia nitrogen is located. If the effluent ammonia nitrogen zone is determined to be in a risk zone, aeration will not be delayed, and the blower will be controlled by PID according to the different target DO values ​​set in the aeration time segment. The aeration branch pipe will be controlled in conjunction with the blower frequency. If not, effluent ammonia nitrogen feedback control will be re-implemented, and the control strategy corresponding to the effluent ammonia nitrogen zone will be executed according to the zone in which the effluent ammonia nitrogen is located. If the effluent ammonia nitrogen zone is determined to be within a controllable zone, then the aeration time is extended, and the blower is controlled by PID according to the different target DO values ​​set in the aeration time segment, and the aeration branch pipe is controlled in linkage according to the blower frequency; otherwise, the effluent ammonia nitrogen feedback control is re-implemented, and the control strategy corresponding to the effluent ammonia nitrogen zone is executed according to the zone in which the effluent ammonia nitrogen is located. If the effluent ammonia nitrogen zone is determined to be in a low value zone, then the aeration time is delayed, the blower operates at the set minimum frequency, only aeration branch pipes No. 2 and No. 3 are turned on, the other aeration branch pipes are not involved in the linkage control shutdown, and all aeration branch pipes are not linked to the blower frequency control; if not, then the effluent ammonia nitrogen feedback control is re-implemented, and the control strategy corresponding to the zone is executed according to the effluent ammonia nitrogen zone. Among them, the aeration delay is the delay of the aeration time for the next cycle. During the delay period, the blower does not work, the agitator is turned on, and the power density of agitation per ton of water is lower than the power density of aeration per ton of water. The above steps S101 to S104 are repeated cyclically to treat the wastewater periodically by the ICEAS biochemical system.

2. The ICEAS wastewater treatment process control method according to claim 1, characterized in that, In step S101, a level gauge is installed in each ICEAS biological tank. The level gauge is connected to the host computer. The host computer can monitor the level of each stage of each cycle, including the water inlet sedimentation stage, water inlet decanting stage, water inlet stirring stage, and water inlet control stage, in real time through the level gauge, and record each level. The water inlet height of each ICEAS biological tank is calculated based on the recorded levels. The difference in water inlet height between ICEAS biological tanks is determined based on the water inlet height of each ICEAS biological tank. If not, the opening time of the water inlet valve of the ICEAS biological tank with the larger water inlet height is adjusted, and the water inlet volume of the corresponding ICEAS biological tank is adjusted to control the difference in water inlet height of all ICEAS biological tanks within 0.1m.

3. The ICEAS wastewater treatment process control method according to claim 2, characterized in that, In the aforementioned method, adjusting the opening duration of the inlet valve of the ICEAS biological treatment tank with a large inlet water height refers to: Based on the influent flow rate of each ICEAS biological tank, all ICEAS biological tanks are sorted. The opening duration of the influent valve of the ICEAS biological tank with the smallest influent flow rate is kept constant, while the opening duration of the influent valve of each ICEAS biological tank with a large influent height is reduced by the corresponding predetermined adjustment amount.

4. The ICEAS wastewater treatment process control method according to any one of claims 1-3, characterized in that, In step S101, the preset valve closing time is less than the sedimentation time of the influent sedimentation stage; In step S102, the PLC controller closes each inlet valve according to the control command of the host computer based on the decanting delay valve closing time.

5. The process control method for the ICEAS wastewater treatment process according to claim 1, characterized in that, In the method described, if the effluent ammonia nitrogen zone is in a risk zone, aeration is not delayed. The blower is controlled by PID according to different target DO values ​​set for different aeration time segments. The aeration branch pipe is linked to the blower frequency and the aeration time is divided into three segments: 0-30 min, 30-60 min, and 60-120 min. The target DO value corresponding to the 0-30 min segment is 0.5 mg / L, and the corresponding maximum blower frequency is 30 Hz. The target DO value corresponding to the 30-60 min segment is 1.0 mg / L, and the corresponding maximum blower frequency is 35 Hz. The target DO value corresponding to the 60-120 min segment is 1.5 mg / L, and the corresponding maximum blower frequency is 40 Hz. The P value for PID control is 0.2, the I value is 30, and the D value is 0. The DO dead zone is 0.3 mg / L; the initial frequency of the fan is 30 Hz. The aeration branch pipes are controlled in conjunction with the blower frequency in the following manner: When the fan frequency F is 23Hz≤F≤28Hz, close aeration branch pipe No. 1 and aeration branch pipe No. 4, and open aeration branch pipe No. 2 and aeration branch pipe No.

3. When the fan frequency F is 29Hz≤F≤36Hz, close aeration branch pipe No. 1 and open aeration branch pipe No. 2, aeration branch pipe No. 3 and aeration branch pipe No.

4. When the blower frequency F is 37Hz≤F, open all aeration branch pipes; In the method described above, if the effluent ammonia nitrogen zone is within a controllable zone, the aeration time is delayed. The blower is controlled by PID according to different target DO values ​​set for different aeration time segments. The aeration branch pipe is linked to the blower frequency and the aeration time is divided into three segments: 0-30 min, 30-60 min, and 60-120 min. The target DO value corresponding to the 0-30 min segment is 0.5 mg / L, and the corresponding maximum blower frequency is 30 Hz. The target DO value corresponding to the 30-60 min segment is 10.0 mg / L, and the corresponding maximum blower frequency is 35 Hz. The target DO value corresponding to the 60-120 min segment is 1.5 mg / L, and the corresponding maximum blower frequency is 40 Hz. The P value for PID control is 0.4, the I value is 30, and the D value is 0. The DO dead zone is 0.2 mg / L; the initial frequency of the fan is 25 Hz. The aeration branch pipes are controlled in conjunction with the blower frequency in the following manner: When the fan frequency F is 23Hz≤F≤28Hz, open aeration branch pipe No. 2 and aeration branch pipe No. 3, and close aeration branch pipe No. 1 and aeration branch pipe No.

4. When the fan frequency F is 29Hz≤F≤36Hz, then open aeration branch pipe No. 2, aeration branch pipe No. 3 and aeration branch pipe No. 4, and close aeration branch pipe No.

1. When the blower frequency F is 37Hz≤F, then all aeration branch pipes are opened; Aeration delay is the duration of aeration in the next cycle. During the aeration delay, the blower is turned off and the agitator is turned on, so that the power density of agitation per ton of water is lower than the power density of aeration per ton of water. Each aeration delay is 10 minutes, with a maximum cumulative delay of 20 minutes. In the method, the aeration delay for the effluent ammonia nitrogen zone in the low value zone is 10 minutes, with a cumulative maximum delay of 30 minutes, and the blower operates at the lowest set frequency of 23Hz.

6. The ICEAS wastewater treatment process control method according to any one of claims 1-3, characterized in that, In the method described above, the host computer is a WinCC host computer. In the water inlet and decanting stage control of step S102, the PLC controller controlling the drain valve obtains the decanting warning level, SS warning value and MLSS warning value through the host computer; if any one of the three warning values ​​is triggered during the drainage process, the drain valve is closed; otherwise, drainage is carried out according to the decanting delay time.

7. The ICEAS wastewater treatment process control method according to any one of claims 1-3, characterized in that, The method further includes: Each device is equipped with a sludge concentration meter, turbidity meter, influent ammonia nitrogen online meter, and effluent ammonia nitrogen online meter, all connected to a host computer for communication, enabling them to provide corresponding water measurement data to the host computer. The sludge concentration meter is installed 20cm below the lowest drainage level near the decanter. The sludge concentration meter is used to monitor the sludge concentration during the aeration stage and to monitor the sludge level in the buffer zone during the influent decanting stage. If the host computer determines that MLSS < 100 mg / L based on the sludge concentration meter, it will decan the ICEAS biological treatment tank in the influent decanting stage according to the preset decanting depth. If the MLSS does not meet the above conditions, it will immediately stop the decanting of the ICEAS biological treatment tank, give an early warning and prompt that manual intervention is required. The turbidity meter is installed on the ICEAS outlet water main pipe to indicate the clarity of the outlet water. If the host computer determines that the SS of the effluent is <50mg / L based on the turbidity meter, it confirms that the effluent water quality is clear and decans the ICEAS biological treatment tank in the influent decanting stage according to the preset decanting depth; if it determines that the SS of the effluent does not meet the requirement of SS <50mg / L, it immediately stops the decanting of the ICEAS biological treatment tank, issues an early warning and prompts that manual intervention is required. The online ammonia nitrogen meter for influent is installed on the ICEAS influent main pipe and is used to measure the ammonia nitrogen influent. If the host computer determines that the influent ammonia nitrogen level is greater than the design value based on the online ammonia nitrogen meter, it will issue an early warning and prompt that manual intervention is required. The online ammonia nitrogen meter for influent is installed on the ICEAS effluent main pipe and is used to measure the ammonia nitrogen in the effluent. If the host computer determines that the effluent ammonia nitrogen level is less than the internal control standard based on the online instrument, it will decan the ICEAS biological treatment tank in the influent decanting stage according to the preset decanting depth. If the effluent ammonia nitrogen level does not meet the internal control standard, the decanting of the ICEAS biological treatment tank will be stopped immediately, and a warning will be issued indicating that manual intervention is required.

8. A processing apparatus, characterized in that, include: At least one memory for storing one or more programs; At least one processor is capable of executing one or more programs stored in the memory, such that when the one or more programs are executed by the processor, the processor is able to implement the method of any one of claims 1-7.

9. A readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it can implement the method described in any one of claims 1-7.

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