ICEAS sewage treatment process control method, equipment and medium

Abstract

The invention discloses an ICEAS sewage treatment process control method, equipment and a medium. The method comprises the following steps: step S101, controlling inflow water precipitation with uniformly distributed water quantity; step S102, water inlet decanting control of PLC control delay; step S103, water inlet stirring control; step S104, water inlet aeration control according to water inlet ammonia nitrogen; and circularly executing the steps S101 to S104, and periodically treating the sewage by the ICEAS biochemical system. The method can reduce the labor intensity of operators and reduce the power consumption cost.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an ICEAS sewage treatment process control method. Background Art

[0002] Intermittent Cycle Extended Aeration (ICEAS) is developed from the sequencing batch activated sludge process (SBR). A single SBR reaction tank is divided into two parts along the length direction. The front part is the pre-reaction zone and the rear part is the main reaction zone. The pre-reaction zone can not only regulate the water flow, but also serve as a selector to inhibit sludge swelling.

[0003] The traditional ICEAS process single tank adopts the operation mode of continuous water inflow and intermittent water discharge. Usually, one cycle time is 288 minutes, including 60 minutes of water sedimentation, 60 minutes of water decanting, 48 minutes of water stirring, and 120 minutes of water aeration. The functions of each stage are as follows: A. Inlet stirring stage, it mainly provides anaerobic and anoxic environment for microorganisms. Microorganisms in activated sludge use organic matter in the inlet water to perform anaerobic phosphorus release and anoxic denitrification; B. Inlet aeration stage, it mainly provides aerobic environment for microorganisms. Under aerobic conditions, microorganisms in activated sludge oxidize organic matter into carbon dioxide and ammonia nitrogen into nitrate nitrogen, and also aerobic phosphorus absorption; C. Inlet sedimentation stage, it mainly provides sedimentation environment. At this time, aeration and stirring are stopped, and activated sludge will be in sedimentation state to achieve mud-water separation; D. Inlet decanting stage, the decanting system starts to work, discharges the treated clean water into the next treatment unit, and discharges the remaining sludge into the sludge treatment unit for dehydration treatment. After decanting, the next cycle begins, and the sewage is purified through cycles of different stages.

[0004] Since the conventional ICEAS process is only time control within a cycle, it lacks control over process parameters within the cycle, that is, it cannot timely adjust the time allocation and aeration volume of each stage according to the changes in real-time inlet and outlet water concentrations. The intelligence level is not high. If real-time adjustment of parameters is required, professionals are required to be on duty 24 hours a day and adjust the operating parameters in real time according to actual working conditions. There are problems such as low efficiency, high dependence on professionals, and not conducive to energy conservation and consumption reduction. It does not meet the requirements of quality improvement, efficiency improvement, pollution reduction, carbon reduction, and high-quality development. In view of the shortcomings of the traditional ICEAS process control, Chinese patent CN202010483154.6 discloses an optimization control method for reducing energy consumption in ICEAS sewage treatment process, but this method has uneven water distribution, and the fuzzy control of aeration is too dependent on personnel experience and has a lag phenomenon, which makes the intelligence level of ICEAS process control not high, which is not conducive to achieving cost reduction and efficiency improvement.

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

[0006] The purpose of the present invention is to provide an ICEAS sewage treatment process control method, which can ensure uniform water distribution and perform zoned PID control on aeration control, thereby solving the above-mentioned technical problems existing in the operation of the existing ICEAS process.

[0007] The objective of the present invention is achieved through the following technical solutions:

[0008] An ICEAS wastewater treatment process control method is used in the wastewater treatment in the ICEAS biochemical system in four stages: influent sedimentation, influent decanting, influent stirring and influent aeration, including:

[0009] Step S101, water inflow sedimentation control: at the beginning of the water inflow sedimentation stage, according to the water inflow height of each ICEAS biochemical pool of the ICEAS biochemical system in the cycle, the opening time of each water inflow valve is adjusted to control the water inflow of each ICEAS biochemical pool, and the water inflow height difference of all ICEAS biochemical pools is controlled within 0.1m; at the beginning of the water inflow sedimentation stage, a valve closing time is preset by controlling the host computer of the ICEAS biochemical system, and when sedimentation starts, the host computer closes the water inflow valve corresponding to the ICEAS biochemical pool in the water inflow sedimentation stage according to the preset valve closing time, so that the ICEAS biochemical pool does not enter water and is in a static sedimentation state, and after the valve closing time is reached, the water inflow valve of the ICEAS biochemical pool is opened again;

[0010] Step S102, water inlet and decanting control: a decanting delay valve closing time is preset by the host computer and the PLC controller is controlled according to the decanting delay valve closing time, and the water inlet valve corresponding to the ICEAS biochemical pool in the early stage of water inlet and decanting is opened. When the ICEAS biochemical pool reaches the decanting delay valve closing time at the end of the water inlet and decanting stage, the water inlet valve of the ICEAS biochemical pool is closed;

[0011] Step S103, water inlet stirring control: the stirring delay time and whether to activate the stirring delay control can be set by the host computer. When the stirring delay control is activated and takes effect, the stirring device is in a closed state during the stirring delay time. After the stirring delay time ends, the stirring device of the ICEAS biochemical pool in the water inlet stirring stage is turned on;

[0012] Step S104, inlet aeration control: the upper computer determines whether the inlet ammonia nitrogen exceeds the design value. If not, the aeration control is not activated, and aeration is performed manually to perform aeration with the maximum gas volume and maximum aeration time. If so, the aeration control is activated to further determine whether the outlet ammonia nitrogen is greater than or equal to the warning value and less than or equal to the aeration control value. If not, an outlet ammonia nitrogen warning is issued. If so, aeration control is performed by combining the outlet ammonia nitrogen partition with the target DO value and fan frequency of the aeration time segment and the PID linkage control method of the aeration branch pipe and the fan frequency;

[0013] The above steps S101 to S104 are cyclically executed to periodically treat the sewage by the ICEAS biochemical system.

[0014] A processing device, comprising:

[0015] at least one memory for storing one or more programs;

[0016] At least one processor can execute one or more programs stored in the memory. When the one or more programs are executed by the processor, the processor can implement the method described in the present invention.

[0017] A readable storage medium stores a computer program, which can implement the method described in the present invention when the computer program is executed by a processor.

[0018] Compared with the prior art, the ICEAS sewage treatment process control method, equipment and medium provided by the present invention have the following beneficial effects:

[0019] 1) By adjusting the opening time of each water inlet valve according to the water inlet height in each ICEAS biochemical pool during the cycle in the water inlet sedimentation control step, the water inlet amount of each ICEAS biochemical pool can be controlled, so that the water inlet amount in each ICEAS biochemical pool cycle can be evenly distributed. By closing the water inlet valve according to the preset valve closing time during the water inlet sedimentation stage, no water is introduced during the sedimentation stage, which can create a static sedimentation environment and help improve the sedimentation effect.

[0020] 2) By using a PLC controller to control the decanting delay valve closing time in the water inlet and decanting control step, compared with the time relay control, the valve closing time can be modified in time on the host computer operation interface, which improves work efficiency and eliminates the impact of increased suspended matter at the end of decanting due to continuous water inlet.

[0021] 3) In the inlet aeration control step, aeration control is performed by combining the target DO value and fan frequency of the outlet ammonia nitrogen partition with the aeration time segment, and the PID linkage control of the aeration branch pipe and the fan frequency, which can achieve more precise control, reduce operating energy consumption, and avoid the problem of insufficient or excessive aeration when the inlet water quality and water volume fluctuate greatly. Due to the addition of the PID linkage control of the fan frequency and DO, the DO is avoided from "jumping" during the degradation of organic matter and ammonia nitrogen, resulting in a sudden increase or decrease in the fan frequency at a certain time point. The aeration volume can be adjusted in time according to the changes in water quality and water volume, which can ensure the stable operation of the process and achieve cost reduction and efficiency improvement.

[0022] In summary, the method of the present invention reduces the labor intensity of operators: the original control system requires operators to adjust the fan frequency on the host computer system according to the operating conditions, and the improved fan frequency is automatically adjusted according to the change of DO value; it can reduce power consumption costs: this method has been successfully applied in the first phase of the ICEAS process of the urban sewage treatment plant in Huangmei County, Hubei Province (design scale 30,000 tons / day). Before 2017, the power consumption per ton of water before the transformation was 0.114 kw·h / m 3 After the transformation, the control method was upgraded twice. The first time, the power consumption per ton of water was upgraded to 0.108kw·h / m 3 The second time the method of the present invention is used to upgrade the water consumption per ton, the power consumption is 0.097 kw·h / m 3 Before and after the transformation, the electricity bill can be saved by nearly 200,000 yuan each year. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0024] Figure 1 A flow chart of the ICEAS sewage treatment process control method provided in an embodiment of the present invention.

[0025] Figure 2 A schematic diagram of the composition of the ICEAS biochemical system of the ICEAS sewage treatment process control method provided in an embodiment of the present invention.

[0026] Figure 3 A flow chart of water inlet aeration control of the ICEAS sewage treatment process control method provided in an embodiment of the present invention.

[0027] In the figure: 1-water 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-outlet ammonia nitrogen meter. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in combination with the specific content of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, which does not constitute a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0029] First, the terms that may be used in this article are explained as follows:

[0030] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y means both “X” or “Y” and “X and Y”.

[0031] The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

[0032] The term "consisting of..." means excluding any technical feature elements not explicitly listed. If this term is used in a claim, it will make the claim closed, so that it does not contain technical feature elements other than those explicitly listed, except for conventional impurities related to them. If this term only appears in a clause of a claim, it only limits the elements explicitly listed in that clause, and the elements recorded in other clauses are not excluded from the overall claim.

[0033] Unless otherwise specified or limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0034] When concentration, temperature, pressure, size or other parameters are expressed in the form of a numerical range, the numerical range should be understood to specifically disclose all ranges formed by the pairing of any upper limit, lower limit, and preferred value in the numerical range, regardless of whether the range is explicitly stated; for example, if a numerical range of "2 to 8" is stated, the numerical range should be interpreted as including 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 specified, the numerical ranges stated herein include both their end values ​​and all integers and fractions within the numerical range.

[0035] The orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the drawings and are only for the convenience and simplification of description, and do not explicitly or implicitly indicate that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation of this document.

[0036] The scheme provided by the present invention is described in detail below. The contents not described in detail in the embodiments of the present invention belong to the prior art known to professionals in the field. If the specific conditions are not specified in the embodiments of the present invention, they are carried out according to the conventional conditions in the field or the conditions recommended by the manufacturer. If the manufacturers are not specified in the reagents or instruments used in the embodiments of the present invention, they are all conventional products that can be purchased commercially.

[0037] like Figure 1 As shown, an embodiment of the present invention provides an ICEAS sewage treatment process control method, which is used in the sewage treatment in the ICEAS biochemical system in four stages of influent sedimentation, influent decanting, influent stirring and influent aeration, including:

[0038] Step S101, water inlet sedimentation control: at the beginning of the water inlet sedimentation stage, according to the water inlet height of each ICEAS biochemical pool of the ICEAS biochemical system in the cycle, the opening time of each water inlet valve is adjusted to control the water inlet amount of each ICEAS biochemical pool, and the water inlet height difference of all ICEAS biochemical pools is controlled within 0.1m, so that each ICEAS biochemical pool can achieve uniform water inlet; at the beginning of the water inlet sedimentation stage, a valve closing time is preset by controlling the host computer of the ICEAS biochemical system, and when the sedimentation starts, the host computer closes the water inlet valve corresponding to the ICEAS biochemical pool in the water inlet sedimentation stage according to the preset valve closing time, so that the ICEAS biochemical pool does not enter water and is in a static sedimentation state, and after the valve closing time is reached, the water inlet valve of the ICEAS biochemical pool is opened again; through such water inlet sedimentation control, not only can uniform water inlet be achieved, but also the sedimentation effect of the ICEAS process can be improved, and the effluent water quality can be improved; preferably, the preset valve closing time is generally 30 minutes;

[0039] Step S102, water inlet and decanting control: a decanting delay valve closing time is preset by the host computer and the PLC controller is controlled according to the decanting delay valve closing time, and the water inlet valve corresponding to the ICEAS biochemical pool in the early stage of the water inlet and decanting stage is opened. After the ICEAS biochemical pool reaches the decanting delay valve closing time at the end of the water inlet and decanting stage, the water inlet valve of the ICEAS biochemical pool is closed; through such water inlet and decanting control, the influence of the increase of suspended matter at the end of decanting due to continuous water inlet can be eliminated;

[0040] Step S103, water inlet stirring control: the stirring delay time and whether to activate the stirring delay control can be set by the host computer. When the stirring delay control is activated and takes effect, the stirring device is in a closed state during the stirring delay time. After the stirring delay time ends, the stirring device of the ICEAS biochemical pool in the water inlet stirring stage is turned on; through such water inlet stirring control, it is possible to choose whether to turn on the stirring device according to the values ​​of the total nitrogen in the inlet and outlet water, which can save unnecessary stirring power consumption;

[0041] Step S104, inlet aeration control: the upper computer determines whether the inlet ammonia nitrogen exceeds the design value. If not, the aeration control is not activated, and the aeration is manually intervened to perform aeration with the maximum gas volume and maximum aeration time; if so, the aeration control is activated to further determine whether the outlet ammonia nitrogen is greater than or equal to the warning value and less than or equal to the aeration control value. If not, an outlet ammonia nitrogen warning is issued. If so, aeration control is performed by combining the outlet ammonia nitrogen partition with the target DO value and fan frequency of the aeration time segment and the PID linkage control mode of the aeration branch pipe and the fan frequency; through such inlet aeration control, the operating conditions can be adjusted in time according to the changes in water quality, and unnecessary power consumption of stirring and aeration can also be saved;

[0042] The above steps S101 to S104 are cyclically executed to periodically treat the sewage by the ICEAS biochemical system.

[0043] Preferably, in step S101 of the above method, in step S101, a liquid level meter is set in each ICEAS biochemical pool, and the liquid level meter is communicatively connected to the host computer. The host computer can monitor the liquid level of each stage of the water inlet sedimentation stage, the water inlet decanting stage, the water inlet stirring stage, and the water inlet control stage in each cycle in real time through the liquid level meter, and record each liquid level. The water inlet height of each ICEAS biochemical pool is calculated according to the recorded liquid levels, and whether the water inlet height difference between the ICEAS biochemical pools is controlled within 0.1m is determined according to the water inlet height of each ICEAS biochemical pool. If not, the opening time of the water inlet valve of the ICEAS biochemical pool with a large water inlet height is adjusted, and the water inlet amount of the corresponding ICEAS biochemical pool is adjusted until the water inlet height difference of all ICEAS biochemical pools is controlled within 0.1m.

[0044] Preferably, in the above method, in the method, adjusting the opening time of the water inlet valve of the ICEAS biochemical pool with a large water inlet height refers to:

[0045] All ICEAS biochemical pools are sorted according to the water inflow of each ICEAS biochemical pool, the opening time of the water inlet valve of the ICEAS biochemical pool with the smallest water inflow is kept unchanged, and the opening time of the water inlet valve of other ICEAS biochemical pools with large water inflow height is reduced according to the corresponding predetermined adjustment amount;

[0046] The predetermined adjustment amount can be preset on the host computer.

[0047] For example, at the beginning, since the water inlet valves of all ICEAS biochemical pools are fully open, the full-open time is preset according to the actual situation, and is generally 90 seconds. When the water inflow is found to be uneven, for example, the order of water inflow is: ICEAS biochemical pool No. 1> ICEAS biochemical pool No. 2> ICEAS biochemical pool No. 3> ICEAS biochemical pool No. 4, first, the opening time of the water inlet valve of ICEAS biochemical pool No. 4 with the smallest water inflow remains unchanged, the opening time of the water inlet valve of ICEAS biochemical pool No. 1 is correspondingly reduced by 5 seconds, the opening time of the water inlet valve of ICEAS biochemical pool No. 2 is correspondingly reduced by 3 seconds, and the opening time of the water inlet valve of ICEAS biochemical pool No. 3 is correspondingly reduced by 1 second, until the water inlet height difference between the ICEAS biochemical pools is within 0.1m. The adjustment amount of reducing the opening time can be modified in the upper computer operation interface. The adjustment of the opening time of the water inlet valve is only adjusted once at the beginning of each cycle.

[0048] Preferably, in step S101 of the above method, the preset valve closing time is shorter than the settling time of the water inlet settling stage.

[0049] Preferably, in step S102 of the above method, the PLC controller closes each water inlet valve according to the control instruction of the host computer according to the decanting delay valve closing time.

[0050] Preferably, in step S104 of the above method, four aeration branch pipes are arranged in each ICEAS biochemical pool, and the fan is connected to each ICEAS biochemical pool through the four aeration branch pipes, and the four 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 respectively.

[0051] Preferably, in step S104 of the above method, aeration control is performed by combining the effluent ammonia nitrogen partition with the target DO value and fan frequency of the aeration time segment and the PID linkage control mode of the aeration branch pipe and the fan frequency, and the effluent ammonia nitrogen partition is performed according to the effluent ammonia nitrogen value in the following manner, including:

[0052] The interval where the effluent ammonia nitrogen is ≥4mg / L is set as the warning zone;

[0053] The range of effluent ammonia nitrogen between 2.00 and 3.99 mg / L is set as the risk zone;

[0054] The range of effluent ammonia nitrogen from 1.00 to 1.99 mg / L is set as the controllable zone;

[0055] The interval of effluent ammonia nitrogen ≤ 0.99 mg / L is set as the low value zone;

[0056] The target DO value and fan frequency of the effluent ammonia nitrogen partition combined with the aeration time segment and the PID linkage control of the aeration branch pipe and the fan frequency are controlled in the following manner, including:

[0057] If the ammonia nitrogen zone of the outlet water is in the warning zone, aeration will not be delayed, the fan will run at the set maximum frequency of 37Hz, all aeration branches will be opened, and none of them will be linked to the fan frequency control;

[0058] Determine whether the outlet ammonia nitrogen partition is in the warning zone. If so, aeration will not be delayed, the fan will run at the set maximum frequency of 37Hz, all aeration branches will be opened, and none of them will be linked to the fan frequency control; if not, the outlet ammonia nitrogen feedback control will be re-performed, and the control strategy corresponding to the interval where the outlet ammonia nitrogen is located will be executed;

[0059] Determine whether the outlet ammonia nitrogen partition is in the risk zone. If so, aeration will not be delayed, and the fan will be PID controlled according to the different target DO values ​​set in the aeration time segment, and the aeration branch pipe will be linked controlled according to the fan frequency; if not, the outlet ammonia nitrogen feedback control will be re-performed, and the control strategy corresponding to the interval will be executed according to the interval where the outlet ammonia nitrogen is located;

[0060] Determine whether the effluent ammonia nitrogen partition is in the controllable area. If so, aeration is delayed, and the fan is PID controlled according to the different target DO values ​​set in the aeration time segment, and the aeration branch pipe is linked controlled according to the fan frequency; if not, the effluent ammonia nitrogen feedback control is re-performed, and the control strategy corresponding to the interval is executed according to the interval where the effluent ammonia nitrogen is located;

[0061] It is determined whether the outlet ammonia nitrogen partition is in the low value area. If so, the aeration is delayed, the fan runs at the set minimum frequency, only aeration branch pipes No. 2 and No. 3 are opened, and other aeration branches do not participate in the linkage control and are closed, and all aeration branches are not linked to the fan frequency. If not, the outlet ammonia nitrogen feedback control is re-performed, and the control strategy corresponding to the interval is executed according to the interval where the outlet ammonia nitrogen is located.

[0062] Preferably, in the above method, if the effluent ammonia nitrogen partition is in the risk zone, aeration is not delayed, and the fan is PID controlled according to different target DO values ​​set in the aeration time segment. The aeration branch pipe is controlled according to the linkage control of the fan frequency, and the aeration time is segmented into three segments of 0-30min, 30-60min, and 60-120min. The corresponding target DO value in the segment of 0-30min is 0.5mg / L, and the corresponding maximum fan frequency is 30Hz. The corresponding target DO value in the segment of 30-60min is 1.0mg / L, and the corresponding maximum fan frequency is 35Hz. The corresponding target DO value in the segment of 60-120min is 1.5mg / L, and the corresponding maximum fan frequency is 40Hz.

[0063] The P value for PID control is 0.2, the I value is 30, and the D value is 0;

[0064] DO value dead zone: 0.3mg / L; fan initial frequency: 30Hz;

[0065] The aeration branch pipes are controlled in linkage with the fan frequency in the following ways, including:

[0066] When the fan frequency F is: 23Hz≤F≤28Hz, close the aeration branch pipe No. 1 and the aeration branch pipe No. 4, and open the aeration branch pipe No. 2 and the aeration branch pipe No. 3;

[0067] When the fan frequency F is: 29Hz≤F≤36Hz, close the aeration branch pipe No. 1, and open the aeration branch pipes No. 2, 3 and 4;

[0068] When the fan frequency F is: 37Hz≤F, open all aeration branches;

[0069] In the above method, if the effluent ammonia nitrogen partition is in the controllable zone, the aeration is delayed, and the fan is PID controlled according to the different target DO values ​​set in the aeration time segment. The aeration branch pipe is controlled according to the linkage control of the fan frequency, and the aeration time is segmented into three segments of 0-30min, 30-60min, and 60-120min. The corresponding target DO value in the segment of 0-30min is 0.5mg3mg / L, and the corresponding maximum fan frequency is 30Hz. The corresponding target DO value in the segment of 30-60min is 10.0mg8mg / L, and the corresponding maximum fan frequency is 35Hz. The corresponding target DO value in the segment of 60-120min is 1.5mg2mg / L, and the corresponding maximum fan frequency is 40Hz.

[0070] The P value for PID control is 0.4, the I value is 30, and the D value is 0;

[0071] DO value dead zone: 0.2mg / L; fan initial frequency: 25Hz;

[0072] The aeration branch pipes are controlled in linkage with the fan frequency in the following ways, including:

[0073] When the fan frequency F is: 23Hz≤F≤28Hz, the aeration branch pipe No. 2 and the aeration branch pipe No. 3 are opened, and the aeration branch pipe No. 1 and the aeration branch pipe No. 4 are closed;

[0074] When the fan frequency F is: 29Hz≤F≤36Hz, the aeration branch pipes No. 2, 3 and 4 are opened, and the aeration branch pipe No. 1 is closed;

[0075] When the fan frequency F is: 37Hz≤F, all aeration branches are opened;

[0076] Aeration delay is the delay of aeration time for the next cycle. During the aeration delay stage, the fan 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, and the maximum cumulative delay is 20 minutes.

[0077] In the above method, the aeration delay for the effluent ammonia nitrogen partition in the low value area is 10 minutes, the maximum cumulative delay is 30 minutes, and the fan operates at the lowest set frequency of 23Hz.

[0078] Preferably, in the above method, the host computer is a WinCC host computer;

[0079] In the water inlet and decanting stage control of step S102, the PLC controller controlling the drain valve obtains the decanting warning liquid 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, the water is drained according to the decanting delay time;

[0080] Preferably, the above method further comprises:

[0081] The sludge concentration meter, turbidity meter, inlet ammonia nitrogen online meter and outlet ammonia nitrogen online meter are respectively set to communicate with the host computer, and can provide the corresponding water body measurement data to the host computer; among them,

[0082] The sludge concentration meter is installed at 20 cm, the lowest drainage liquid level, near the decanter. The sludge concentration meter is used to monitor the sludge concentration during the aeration stage and to monitor the mud level height in the buffer zone during the water inlet and decanting stage.

[0083] If the upper computer determines that MLSS is less than 100 mg / L according to the sludge concentration meter, the ICEAS biochemical pool in the water inlet decanting stage is decanted according to the preset decanting depth. When MLSS does not meet the above conditions, the decanting of the ICEAS biochemical pool is immediately stopped, an early warning is given, and a prompt is given that manual intervention is required; this can prevent the effluent from carrying mud and causing the effluent water quality to exceed the standard;

[0084] The turbidity meter is arranged on the ICEAS outlet main pipe, and is used to indicate the clarity of the outlet water body;

[0085] If the host computer determines that the SS of the effluent is less than 50 mg / L according to the turbidity meter, the effluent water quality is confirmed to be clear, and the ICEAS biochemical pool in the water inlet decanting stage is decanted according to the preset decanting depth; when it is determined that the SS of the effluent does not meet SS<50 mg / L, the decanting of the ICEAS biochemical pool is immediately stopped, an early warning is given, and a prompt is given that manual intervention is required; this can prevent the effluent from carrying mud and causing the effluent water quality to exceed the standard;

[0086] The inlet ammonia nitrogen online instrument is arranged on the ICEAS inlet main pipe to measure the inlet ammonia nitrogen value;

[0087] If the upper computer determines that the influent ammonia nitrogen is greater than the design value according to the influent ammonia nitrogen online instrument, it will give an early warning and prompt that manual intervention is required;

[0088] The inlet ammonia nitrogen online instrument is arranged on the ICEAS outlet main pipe to measure the outlet ammonia nitrogen value;

[0089] If the upper computer determines that the effluent ammonia nitrogen is less than the internal control standard according to the effluent ammonia nitrogen online instrument, the ICEAS biochemical pool in the water inlet decanting stage will be decanted according to the preset decanting depth. If the effluent ammonia nitrogen does not meet the internal control standard, the decanting of the ICEAS biochemical pool will be stopped immediately, and an early warning will be issued to prompt the need for manual intervention to avoid discharging the excessive water into the subsequent treatment unit.

[0090] In the above method, the relationship between MLSS, turbidity meter and inlet and outlet water quality is combined to control the decanting depth and provide early warning for the decanting water quality. The higher the decanting depth, the lower the liquid level in the aeration stage, the lower the wind pressure of the Roots blower, and the corresponding power consumption.

[0091] The embodiment of the present invention further provides a processing device, including:

[0092] at least one memory for storing one or more programs;

[0093] At least one processor can execute one or more programs stored in the memory. When the one or more programs are executed by the processor, the processor can implement the method described in the present invention.

[0094] The embodiments of the present invention further provide a readable storage medium storing a computer program, which can implement the method described in the present invention when the computer program is executed by a processor.

[0095] In summary, the method of the embodiment of the present invention can reduce the labor intensity of operators: the original control system requires operators to adjust the fan frequency on the host computer system according to the operating conditions, and the improved fan frequency is automatically adjusted according to the change of DO value; it can reduce power consumption costs: this method has been successfully applied to the first phase of the ICEAS process of the urban sewage treatment plant in Huangmei County, Hubei Province (design scale 30,000 tons / day). Before 2017, the power consumption per ton of water before the transformation was 0.114 kw·h / m 3 After the transformation, the control method was upgraded twice. The first time, the power consumption per ton of water was upgraded to 0.108kw·h / m 3 The second time the method of the present invention is used to upgrade the water consumption per ton, the power consumption is 0.097 kw·h / m 3 Before and after the transformation, the electricity bill can be saved by nearly 200,000 yuan each year.

[0096] In order to more clearly demonstrate the technical solution and technical effects provided by the present invention, the solution provided by the embodiment of the present invention is described in detail with specific embodiments below.

[0097] Example 1

[0098] like Figure 1 , Figure 2 As shown, the embodiment of the present invention provides an ICEAS sewage treatment process control method, which can well solve the existing ICEAS sewage treatment process optimization control method to reduce energy consumption, the problem of uneven water distribution, aeration fuzzy control overly dependent on personnel experience and lag, and can further improve the intelligence level of ICEAS process control and better achieve cost reduction and efficiency improvement. The method includes the following steps:

[0099] Step S101. Influent sedimentation control: mainly used to evenly distribute the influent volume of each ICEAS biochemical pool within the cycle and improve the sedimentation effect. Since the four groups of ICEAS biochemical pools are distributed through water distribution channels, such as Figure 1 As shown in the figure, there is uneven water distribution, which will lead to differences in the aeration, stirring and decanting time actually required for each ICEAS biochemical pool, which is not conducive to process control. The upper computer system opens the opening and closing time of the ICEAS biochemical pool inlet valve, and the opening and closing time can be preset in the upper computer operation interface. When the cycle starts, that is, when the inlet sedimentation begins, the system will count the water inlet height of each ICEAS biochemical pool during the cycle, and fine-tune the opening time of each ICEAS biochemical pool inlet valve according to the difference in water inlet height, so as to control each ICEAS biochemical pool. The system controls the water inlet height difference of all ICEAS biochemical pools within 0.1m. Specifically, at the beginning of water inlet sedimentation, the system compares the water inlet height of each ICEAS biochemical pool in the previous cycle (the starting liquid level of decanting - the ending liquid level of decanting), and fine-tunes the opening time of the water inlet valve of each ICEAS biochemical pool (the upper function can set the opening time of the water inlet valve, and can fine-tune the opening time of the water inlet valve) to ensure that the water inlet amount allocated to each ICEAS biochemical pool is uniform (the water inlet height difference of each ICEAS biochemical pool is controlled within 0.1m) and the water volume is uniform. When any ICEAS biochemical pool enters the water inlet sedimentation stage, at the initial stage of water inlet sedimentation, the system will completely close the water inlet valve corresponding to the ICEAS biochemical pool according to the valve closing time preset by the host computer (the valve closing time is generally 30 minutes, and the water inlet sedimentation time is 60 minutes), so that the ICEAS biochemical pool will not enter water during the sedimentation stage and will be in a static sedimentation state. After the valve closing time is reached, the water inlet valve of the ICEAS biochemical pool will be opened again to create a static sedimentation environment, which is beneficial to improving the sedimentation effect. At the same time, the water inflow of other ICEAS biochemical pools per unit time becomes larger, and by shortening the water inflow duration in the reaction stage, this is beneficial to improving the reaction rate in the reaction stage, shortening the actual aeration and stirring time, and saving electricity consumption. After the valve closing time is over, the water inlet valve is opened to start water inlet sedimentation.

[0100] Step S102. Inlet and decanting control: The host computer system opens the decanting delay valve closing time, and the valve closing time can be preset in the host computer operation interface. When any ICEAS biochemical pool enters the water inlet and decanting stage, the system will delay the closing time of the water inlet valve of the ICEAS biochemical pool in the water inlet and decanting stage according to the delayed valve closing time preset by the host computer (the delayed valve closing time is less than the decanting time, and the general time is preset at 10 minutes at the end of the decanting stage). When the delay time is reached, the water inlet valve corresponding to the ICEAS biochemical pool is completely closed, so that the ICEAS biochemical pool is not inlet and is in a static decanting state. When the decanting stage is over, the water inlet valve of the ICEAS biochemical pool is opened again, which can reduce the impact of continuous water inflow causing mud layer floating, which is beneficial to ensuring the final water quality. A sludge concentration meter is installed near the decanter, at the lowest decanter level of 50cm. It can be used to monitor the sludge concentration during the aeration stage and to monitor the mud level in the buffer zone during the sedimentation decanter stage. If the MLSS in the decanter stage is less than 100mg / L, it means that the mud level is low and the drainage is safe. A turbidity meter is installed on the outlet main to indicate the clarity of the water body. If SS is less than 50mg / L, it means that the water quality is clear. The relationship between MLSS, turbidity meter, and inlet and outlet water quality is combined to control the decanter depth and to warn the decanter water quality. The higher the decanter depth, the lower the liquid level in the aeration stage, the lower the wind pressure of the Roots blower, and the corresponding lower the power consumption.

[0101] Step S103. Inlet stirring control system: Inlet stirring mainly provides anoxic mixing environment for denitrification and denitrification. The host computer system opens the inlet stirring delay control logic. You can choose "whether to activate the inlet stirring delay control" and "preset the inlet stirring delay time setting after activation" on the host computer operation interface. When you choose not to activate the inlet stirring delay control, the agitator will be always on during the inlet stirring stage. When you choose to activate the inlet stirring delay control, the stirring delay time control takes effect. The stirring equipment is in the closed state during the stirring delay time. After the stirring delay time is over, the stirring equipment of the ICEAS biochemical pool in the inlet stirring stage is turned on. The operator can choose whether to activate the delay control and set the delay time according to the actual situation. If the biochemical effluent has added a nitrate nitrogen meter, it can be combined with the inlet online data feedforward and the feedback of the nitrate nitrogen meter to achieve precise control. Through this inlet stirring control, you can choose whether to turn on the stirring equipment according to the values ​​of the total nitrogen in the inlet and outlet water, which can save unnecessary stirring power consumption;

[0102] Step S104. Inlet aeration control system: mainly provides an aerobic environment for removing ammonia nitrogen and some organic matter. The upper computer determines whether the inlet ammonia nitrogen exceeds the design value. If so, the aeration control is not activated, and aeration is performed manually with the maximum gas volume and maximum aeration time; if not, the aeration control is activated to further determine the interval of the outlet ammonia nitrogen value. If the outlet ammonia nitrogen value is in the warning zone, the control strategy of the warning zone is executed; if the outlet ammonia nitrogen value is in the risk zone, the control strategy of the risk zone is executed; if the outlet ammonia nitrogen value is in the controllable zone, the control strategy of the controllable zone is executed; if the outlet ammonia nitrogen value is in the low value zone, the control strategy of the low value zone is executed. In the aeration delay strategy during the inlet aeration control process, you can choose whether to activate the aeration delay strategy based on the effluent total nitrogen data. When "Yes" is selected, the fan does not work and the agitator works; when "No" is selected, both the fan and the agitator do not work. Through the inlet ammonia nitrogen early warning control, effluent ammonia nitrogen zoning control, aeration branch pipe control, etc., the aeration time period is divided into three parts based on the original aeration fuzzy control. The target DO and the upper and lower limits of the frequency are set for each part. The fan frequency is PID controlled according to the DO. This real-time PID regulation can adjust the aeration volume in time according to the actual water quality changes, which is more conducive to energy saving and consumption reduction. When the inlet ammonia nitrogen exceeds the warning value, the aeration delay is cancelled. At this time, the aeration time is the longest and the air volume is the largest. When the inlet ammonia nitrogen is lower than the warning value, the inlet ammonia nitrogen is within the process tolerance range. The inlet water is assumed to be stable by default. Different interval strategies are implemented according to the interval values ​​of the effluent ammonia nitrogen. The aeration delay is the aeration time for the next cycle. During the delay stage, the fan does not work and the agitator is turned on. The power density of agitation per ton of water is lower than the power density of aeration per ton of water. Flexible allocation of actual aeration time and stirring time is conducive to strengthening the system's denitrification and phosphorus removal functions, and can also achieve cost reduction and efficiency improvement. For specific strategies, see Figure 3 .

[0103] The above steps S101 to S104 are cyclically executed to periodically treat the sewage by the ICEAS biochemical system.

[0104] 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 liquid 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, the water is drained according to the decanting delay time.

[0105] Furthermore, the method further includes setting a sludge concentration meter, a turbidity meter and an inlet and outlet ammonia nitrogen online meter, wherein the sludge concentration meter is installed at the lowest drainage liquid level of 20 cm near the decanter, and can be used to monitor the sludge concentration in the aeration stage, and can be used to monitor the mud level height in the buffer zone in the sedimentation and decanting stage. For example, if the MLSS in the decanting stage is less than 100 mg / L, it means that the mud level is low and the drainage is safe. The turbidity meter is installed on the ICEAS outlet main pipe to indicate the clarity of the water body. Degree, such as SS <50mg / L, it means the water quality is clear. The relationship between MLSS, turbidity meter and inlet and outlet water quality is combined to control the decanting depth and give early warning of the decanting water quality. The higher the decanting depth, the lower the liquid level in the aeration stage, the lower the wind pressure of the Roots blower, and the corresponding lower the power consumption; the inlet and outlet ammonia nitrogen online instruments are installed on the inlet and outlet main pipes respectively, which can monitor the inlet and outlet ammonia nitrogen values. Each instrument is connected to the host computer for communication and can provide water quality data to the host computer.

[0106] Furthermore, the method further includes setting 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 fan is connected to each ICEAS biochemical pool through the four aeration branch pipes;

[0107] Furthermore, in step S104 of the above method, the number of aeration branches is opened according to the fan frequency in the following manner, specifically:

[0108] When the fan frequency F is 23Hz≤F≤28Hz, the two groups of aeration branches, aeration branch pipe No. 2 and aeration branch pipe No. 3, are opened, and aeration branch pipe No. 1 and aeration branch pipe No. 4 are closed;

[0109] When the fan frequency F is 29Hz≤F≤36Hz, the three groups of aerator branches, namely, the aeration branch pipe No. 2, the aeration branch pipe No. 3 and the aeration branch pipe No. 4, are opened, and the aeration branch pipe No. 1 is closed;

[0110] When the fan frequency F is 37Hz≤F, all aeration branch pipes are fully open, that is, all 4 aeration branch pipes are fully open.

[0111] In the above method, in the water inlet sedimentation control step, the water inlet volume in each ICEAS biochemical pool cycle is evenly distributed and the sedimentation effect is improved. Since the four groups of ICEAS biochemical pools are distributed through water distribution channels, such as Figure 2As shown, there is uneven water distribution, which will lead to differences in the aeration, stirring and decanting time actually required for each ICEAS biochemical pool, which is not convenient for process control. At the beginning of water inlet sedimentation, the water inlet height of each ICEAS biochemical pool in the previous cycle is compared, that is, the decanting start liquid level - the decanting end liquid level is obtained, and the opening time of the water inlet valve of each ICEAS biochemical pool is fine-tuned (the opening time of the water inlet valve is opened by the upper computer, and the opening time of the water inlet valve can be fine-tuned) to ensure that the water inlet amount distributed to each ICEAS biochemical pool is uniform (the difference in the water inlet height of each ICEAS biochemical pool is controlled within 0.1m).

[0112] In the above method, in the water inlet aeration control stage: zone PID control is used for aeration control. Compared with fuzzy control, aeration control is more precise and has lower energy consumption. The ammonia nitrogen zone adjustment is divided into 4 intervals, namely warning zone, risk zone, controllable zone, and low value zone. Compared with the existing method of dividing the zone into 3 intervals: warning zone, coarse adjustment zone, and fine adjustment zone, the operating conditions in the rainy season are added. Different zone control strategies are different, and the control parameters are also different. The finer the zone, the more precise the control.

[0113] In the above method, the aeration time and the fan frequency are adjusted: the existing method controls the adjustment of the aeration time and the fan frequency by fine-tuning the aeration time of the next cycle and the current fan operation frequency through the interval range corresponding to the outlet ammonia nitrogen value. Since the fan frequency is not regulated by the DO value, when the inlet water quality and water volume fluctuate greatly, there will be insufficient aeration or excessive aeration problems. The new control strategy adds PID linkage control of the fan frequency and DO. Due to the obvious concentration gradient in the SBR process, in the process of degradation of organic matter and ammonia nitrogen, DO will "jump", resulting in a sudden increase or decrease in the fan frequency at a certain time point. In order to avoid this situation and realize PID control more accurately, the aeration time period is divided into three stages, namely 0-30min, 30-60min, and 60-120min. Different target DO and frequency limits are set for different time periods. This can eliminate the adverse effects caused by the "jump" of DO. The improved PID control can adjust the aeration volume in time according to the changes in water quality and water volume, which can ensure the stable operation of the process and achieve cost reduction and efficiency improvement.

[0114] In the above method, in the water inlet and decanting control stage: PLC is used to replace the time relay control, so that the valve closing time can be modified in time to avoid the failure of the time relay. The host computer program opens a decanting delay valve closing time, opens the water inlet valve at the beginning of decanting, takes effect at the end of decanting, closes the water inlet valve, and closes the water inlet valve at the end. This can reduce the impact of continuous water inflow causing the mud layer to float, which is conducive to ensuring the water quality at the end.

[0115] The control method of the present invention mainly develops corresponding process control based on cycle time control, which is mainly divided into: 1. Influent sedimentation control; 2. Influent decanting control; 3. Influent stirring control; 4. Influent aeration control. Influent sedimentation strategy is implemented in the influent sedimentation stage, influent decanting strategy is implemented in the influent decanting stage, influent stirring strategy is implemented in the influent stirring stage, and aeration strategy is implemented in the influent aeration stage without interfering with each other. The ICEAS process is preset for a cycle of 288 minutes, which can be divided into four stages: influent sedimentation is preset for 60 minutes, influent decanting is preset for 48 minutes, influent stirring is preset for 60 minutes, and influent aeration is preset for 120 minutes. Water can be introduced into each stage, and the water inlet control can also be activated according to the situation, and intermittent water inlet method can be adopted. In order 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 the corresponding delay control can be set. During the delay control process, the corresponding equipment is in a non-working state. For example, the mixing equipment is in a non-working state during the water inlet mixing delay process, and during the aeration delay process, the fan is in a non-working state, but the agitator can work. Therefore, the actual operation of aeration and mixing time can be adjusted according to the operating conditions, and the mixing and aeration time can be reasonably allocated, which is conducive to the stable operation of the system and avoids unnecessary energy waste.

[0116] Compared with the prior art, the method of the present invention has at least the following beneficial effects:

[0117] 1) Reduce the labor intensity of operators: The original control system requires 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.

[0118] 2) 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 scale 30,000 tons / day). Before 2017, the electricity consumption per ton of water before the transformation was 0.114 kw·h / m 3 After the transformation, the control method was upgraded twice. The power consumption per ton of water in the first upgrade was 0.108kw·h / m 3 (During the original patent period), the second upgrade water consumption per ton is 0.097kw·h / m 3 (After patented improvement), the electricity bill can be saved by nearly 200,000 yuan each year before and after the transformation.

[0119] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. An ICEAS wastewater treatment process control method, used in the ICEAS biochemical system for wastewater treatment in four stages: influent sedimentation, influent decanting, influent stirring and influent aeration, characterized in that: include: Step S101, water inflow sedimentation control: at the beginning of the water inflow sedimentation stage, according to the water inflow height of each ICEAS biochemical pool of the ICEAS biochemical system in the cycle, the opening time of each water inflow valve is adjusted to control the water inflow of each ICEAS biochemical pool, and the water inflow height difference of all ICEAS biochemical pools is controlled within 0.1m; at the beginning of the water inflow sedimentation stage, a valve closing time is preset by controlling the host computer of the ICEAS biochemical system, and when sedimentation starts, the host computer closes the water inflow valve corresponding to the ICEAS biochemical pool in the water inflow sedimentation stage according to the preset valve closing time, so that the ICEAS biochemical pool does not enter water and is in a static sedimentation state, and after the valve closing time is reached, the water inflow valve of the ICEAS biochemical pool is opened again; Step S102, water inlet and decanting control: a decanting delay valve closing time is preset by the host computer and the PLC controller is controlled according to the decanting delay valve closing time, and the water inlet valve corresponding to the ICEAS biochemical pool in the early stage of water inlet and decanting is opened. When the ICEAS biochemical pool reaches the decanting delay valve closing time at the end of the water inlet and decanting stage, the water inlet valve of the ICEAS biochemical pool is closed; Step S103, water inlet stirring control: the stirring delay time and whether to activate the stirring delay control can be set by the host computer. When the stirring delay control is activated and takes effect, the stirring device is in a closed state during the stirring delay time. After the stirring delay time ends, the stirring device of the ICEAS biochemical pool in the water inlet stirring stage is turned on; Step S104, inlet aeration control: the upper computer determines whether the inlet ammonia nitrogen exceeds the design value. If not, the aeration control is not activated, and aeration is performed manually to perform aeration with the maximum gas volume and maximum aeration time. If so, the aeration control is activated to further determine whether the outlet ammonia nitrogen is greater than or equal to the warning value and less than or equal to the aeration control value. If not, an outlet ammonia nitrogen warning is issued. If so, aeration control is performed by combining the outlet ammonia nitrogen partition with the target DO value and fan frequency of the aeration time segment and the PID linkage control method of the aeration branch pipe and the fan frequency; The above steps S101 to S104 are cyclically executed to periodically treat the sewage by the ICEAS biochemical system.

2. The ICEAS sewage treatment process control method according to claim 1, characterized in that: In the step S101, a liquid level meter is arranged in each ICEAS biochemical pool, and the liquid level meter is communicatively connected with the host computer. The host computer can monitor the liquid level of each stage of the water inlet sedimentation stage, the water inlet decanting stage, the water inlet stirring stage, and the water inlet control stage in each cycle in real time through the liquid level meter, and record each liquid level. The water inlet height of each ICEAS biochemical pool is calculated according to the recorded liquid levels. According to the water inlet height of each ICEAS biochemical pool, it is judged whether the water inlet height difference between the ICEAS biochemical pools is controlled within 0.1m. If not, the opening time of the water inlet valve of the ICEAS biochemical pool with a large water inlet height is adjusted, and the water inlet amount of the corresponding ICEAS biochemical pool is adjusted, so that the water inlet height difference of all ICEAS biochemical pools is controlled within 0.1m.

3. The ICEAS sewage treatment process control method according to claim 2, characterized in that: In the method, adjusting the opening time of the water inlet valve of the ICEAS biochemical pool with a large water inlet height refers to: All ICEAS biochemical pools are sorted according to the water inflow of each ICEAS biochemical pool, the opening time of the water inlet valve of the ICEAS biochemical pool with the smallest water inflow is kept unchanged, and the opening time of the water inlet valve of each ICEAS biochemical pool with a large water inflow height is reduced according to the corresponding predetermined adjustment amount.

4. The ICEAS sewage treatment process control method according to any one of claims 1 to 3, characterized in that: In step S101, the preset valve closing time is shorter than the settling time of the water inlet settling stage; In the step S102, the PLC controller closes each water inlet valve according to the control instruction of the host computer according to the decanting delay valve closing time; In step S104, four aeration branches are arranged in each ICEAS biochemical pool, and the fans are connected to each ICEAS biochemical pool through the four aeration branches, and the four aeration branches are aeration branch No. 1, aeration branch No. 2, aeration branch No. 3 and aeration branch No.

4.

5. The ICEAS sewage treatment process control method according to claim 4 is characterized in that: In step S104, aeration control is performed by combining the effluent ammonia nitrogen partition with the target DO value and fan frequency of the aeration time segment and the PID linkage control of the aeration branch pipe and the fan frequency. The effluent ammonia nitrogen partition is performed according to the effluent ammonia nitrogen value in the following manner, including: The interval where the effluent ammonia nitrogen is ≥4mg / L is set as the warning zone; The range of effluent ammonia nitrogen between 2.00 and 3.99 mg / L is set as the risk zone; The range of effluent ammonia nitrogen from 1.00 to 1.99 mg / L is set as the controllable zone; The interval of effluent ammonia nitrogen ≤ 0.99 mg / L is set as the low value zone; The target DO value and fan frequency of the effluent ammonia nitrogen partition combined with the aeration time segment and the PID linkage control of the aeration branch pipe and the fan frequency are controlled in the following manner, including: Determine whether the outlet ammonia nitrogen partition is in the warning zone. If so, aeration will not be delayed, the fan will run at the set maximum frequency of 37Hz, all aeration branches will be opened, and none of them will be linked to the fan frequency control; if not, the outlet ammonia nitrogen feedback control will be re-performed, and the control strategy corresponding to the interval where the outlet ammonia nitrogen is located will be executed; Determine whether the outlet ammonia nitrogen partition is in the risk zone. If so, aeration will not be delayed, and the fan will be PID controlled according to the different target DO values ​​set in the aeration time segment, and the aeration branch pipe will be linked controlled according to the fan frequency; if not, the outlet ammonia nitrogen feedback control will be re-performed, and the control strategy corresponding to the interval will be executed according to the interval where the outlet ammonia nitrogen is located; Determine whether the effluent ammonia nitrogen partition is in the controllable area. If so, aeration is delayed, and the fan is PID controlled according to the different target DO values ​​set in the aeration time segment, and the aeration branch pipe is linked controlled according to the fan frequency; if not, the effluent ammonia nitrogen feedback control is re-performed, and the control strategy corresponding to the interval is executed according to the interval where the effluent ammonia nitrogen is located; It is determined whether the outlet ammonia nitrogen partition is in the low value area. If so, the aeration is delayed, the fan runs at the set minimum frequency, only aeration branch pipes No. 2 and No. 3 are opened, and other aeration branches do not participate in the linkage control and are closed, and all aeration branches are not linked to the fan frequency. If not, the outlet ammonia nitrogen feedback control is re-performed, and the control strategy corresponding to the interval is executed according to the interval where the outlet ammonia nitrogen is located.

6. The ICEAS sewage treatment process control method according to claim 5, characterized in that: In the method, if the effluent ammonia nitrogen partition is in the risk zone, aeration is not delayed, and the fan is PID controlled according to different target DO values ​​set in the aeration time segment. The aeration branch pipe is linked to the fan frequency to segment the aeration time into three segments: 0-30min, 30-60min, and 60-120min. The corresponding target DO value in the 0-30min segment is 0.5mg / L, and the corresponding maximum fan frequency is 30Hz. The corresponding target DO value in the 30-60min segment is 1.0mg / L, and the corresponding maximum fan frequency is 35Hz. The corresponding target DO value in the 60-120min segment is 1.5mg / L, and the corresponding maximum fan frequency is 40Hz. The P value for PID control is 0.2, the I value is 30, and the D value is 0; DO value dead zone: 0.3mg / L; fan initial frequency: 30Hz; The aeration branch pipes are controlled in linkage with the fan frequency in the following ways, including: When the fan frequency F is: 23Hz≤F≤28Hz, close the aeration branch pipe No. 1 and the aeration branch pipe No. 4, and open the aeration branch pipe No. 2 and the aeration branch pipe No. 3; When the fan frequency F is: 29Hz≤F≤36Hz, close the aeration branch pipe No. 1, and open the aeration branch pipes No. 2, 3 and 4; When the fan frequency F is: 37Hz≤F, open all aeration branches; In the method, if the effluent ammonia nitrogen partition is in the controllable zone, the aeration is delayed, and the fan is PID controlled according to different target DO values ​​set in the aeration time segment. The aeration branch pipe is linked to the fan frequency to segment the aeration time into three segments: 0-30min, 30-60min, and 60-120min. The corresponding target DO value in the 0-30min segment is 0.5mg3mg / L, and the corresponding maximum fan frequency is 30Hz. The corresponding target DO value in the 30-60min segment is 10.0mg8mg / L, and the corresponding maximum fan frequency is 35Hz. The corresponding target DO value in the 60-120min segment is 1.5mg2mg / L, and the corresponding maximum fan frequency is 40Hz. The P value for PID control is 0.4, the I value is 30, and the D value is 0; DO value dead zone: 0.2mg / L; fan initial frequency: 25Hz; The aeration branch pipes are controlled in linkage with the fan frequency in the following ways, including: When the fan frequency F is: 23Hz≤F≤28Hz, the aeration branch pipe No. 2 and the aeration branch pipe No. 3 are opened, and the aeration branch pipe No. 1 and the aeration branch pipe No. 4 are closed; When the fan frequency F is: 29Hz≤F≤36Hz, the aeration branch pipes No. 2, 3 and 4 are opened, and the aeration branch pipe No. 1 is closed; When the fan frequency F is: 37Hz≤F, all aeration branches are opened; Aeration delay is the delay of aeration time for the next cycle. During the aeration delay stage, the fan 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, and the maximum cumulative delay is 20 minutes. In the method, the aeration delay for the effluent ammonia nitrogen partition in the low value area is 10 minutes, the cumulative maximum delay is 30 minutes, and the fan operates at the lowest set frequency of 23Hz.

7. The ICEAS sewage treatment process control method according to any one of claims 1 to 3, characterized in that: In the method, the host computer is a WinCC host computer; In the water inlet and decanting stage control of step S102, the PLC controller that controls the drain valve obtains the decanting warning liquid 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, the water is drained according to the decanting delay time.

8. The ICEAS sewage treatment process control method according to any one of claims 1 to 3, characterized in that: The method further comprises: The sludge concentration meter, turbidity meter, inlet ammonia nitrogen online meter and outlet ammonia nitrogen online meter are respectively set to communicate with the host computer, and can provide the corresponding water body measurement data to the host computer; among them, The sludge concentration meter is installed at 20 cm, the lowest drainage liquid level, near the decanter. The sludge concentration meter is used to monitor the sludge concentration during the aeration stage and to monitor the mud level height in the buffer zone during the water inlet and decanting stage. If the upper computer determines that MLSS is less than 100 mg / L according to the sludge concentration meter, the ICEAS biochemical pool in the water inlet decanting stage is decanted according to the preset decanting depth. When MLSS does not meet the above conditions, the decanting of the ICEAS biochemical pool is immediately stopped, an early warning is given, and a prompt is given that manual intervention is required; The turbidity meter is arranged on the ICEAS outlet main pipe, and is used to indicate the clarity of the outlet water body; If the host computer determines that the SS of the effluent is less than 50 mg / L according to the turbidity meter, the effluent water quality is confirmed to be clear, and the ICEAS biochemical pool in the water inlet decanting stage is decanted according to the preset decanting depth; if it is determined that the SS of the effluent does not meet SS<50 mg / L, the decanting of the ICEAS biochemical pool is immediately stopped, an early warning is given, and a prompt is given that manual intervention is required; The inlet ammonia nitrogen online instrument is arranged on the ICEAS inlet main pipe to measure the inlet ammonia nitrogen; If the upper computer determines that the influent ammonia nitrogen is greater than the design value according to the influent ammonia nitrogen online instrument, it will give an early warning and prompt that manual intervention is required; The inlet ammonia nitrogen online instrument is arranged on the ICEAS outlet main pipe to measure the outlet ammonia nitrogen; If the host computer determines that the effluent ammonia nitrogen is less than the internal control standard according to the effluent ammonia nitrogen online instrument, the ICEAS biochemical pool in the water inlet decanting stage will be decanted according to the preset decanting depth. If the effluent ammonia nitrogen does not meet the internal control standard, the decanting of the ICEAS biochemical pool will be stopped immediately, and an early warning will be issued to prompt that manual intervention is required.

9. A processing device, 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, and when the one or more programs are executed by the processor, the processor is capable of implementing the method described in any one of claims 1 to 8.

10. A readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 8 can be implemented.

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