Sewage treatment aeration gas supply amount calculation method and storage medium

Abstract

The invention belongs to the technical field of sewage treatment, and discloses a sewage treatment aeration gas supply amount calculation method and a storage medium, and the method comprises the following steps: S1, establishing a mass balance calculation formula of the change rate of oxygen in a liquid phase; s2, according to the characteristics of different aeration heads, obtaining the relationship between the SOTE and the air supply amount of a single aeration head under different aeration head arrangement densities, and obtaining the relationship between the SOTE and kLaL; s3, according to the relationship between the SOTE and the kLaL, fitting to obtain a relational expression between the kLaL and the air supply amount; s4, obtaining an influence parameter relational expression of the arrangement density of the aeration heads on the kLaL according to the obtained relation between the kLaL and the air supply amount; and S5, combining the relational expressions in the S3 and S4 with the mass balance calculation formula in the S1 to obtain the value of the aeration air supply quantity Qair. The technical purpose of the invention is to provide the sewage treatment aeration gas supply amount calculation method and the storage medium, and the accurate aeration gas supply amount can be improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of sewage treatment, and particularly relates to a sewage treatment aeration gas supply amount calculation method and a storage medium. BACKGROUND

[0002] Sewage treatment usually uses a biochemical reaction treatment method. In a sewage treatment process using biochemical reactions, aeration into a reactor is essential to maintain an aerobic environment for the removal of organic matter and the oxidation of organic nitrogen and ammonia nitrogen, and is an important part of ensuring the treatment effect of the process, and is also the highest energy-consuming part of the biochemical treatment process. Maintaining the dissolved oxygen concentration in the aerobic reactor and designing a suitable air blowing aeration device all require accurate calculation of the required oxygen supply amount in the reactor.

[0003] The traditional method is to first calculate the actual oxygen demand SOTR under standard conditions, and then use the standard oxygen transfer efficiency SOTE value obtained by actual measurement or provided by the aeration head device manufacturer to calculate the required oxygen supply amount M 氧 :

[0004]

[0005] M 氧 =SOTR / SOTE

[0006] Then, combined with the oxygen content in the local air, the air supply amount Q Air under standard conditions is calculated. For example, when the oxygen content in the local air under standard conditions is 20.9%:

[0007]

[0008] After calculating Q Air , considering that the aeration head may have a series of factors that reduce the oxygen transfer efficiency as the use time increases, a safety factor of 1.5-2.5 is usually multiplied by the calculated value to prevent oxygen deficiency in actual operation after equipment selection based on Q Air . The disadvantages of this method are: 1) only one SOTE value is usually referred to; 2) the influence of the arrangement density of the aeration head is not considered; 3) the safety factor is too rough, causing the equipment selection to be too large, and it is difficult to effectively control the dissolved oxygen concentration in actual operation, and the dissolved oxygen concentration is often too high, which is not conducive to the formation of microbial flocs, and the dissolved oxygen is brought into the non-aeration zone in the backflow, and a large energy consumption is caused.

[0009] Therefore, a more accurate calculation method for the aeration gas supply amount of sewage treatment is needed. SUMMARY

[0010] In view of the above problems, the technical purpose of the present application is to provide a sewage treatment aeration gas supply amount calculation method and storage medium, so as to provide more accurate gas supply amount.

[0011] The present application is realized by the following technical solutions:

[0012] A sewage treatment aeration gas supply amount calculation method, characterized in that it comprises the following steps:

[0013] S1, a mass balance calculation formula of the change rate of oxygen in the liquid phase is established;

[0014] S2, according to the characteristics of different aeration heads, the relationship between SOTE and the gas supply amount of a single aeration head under different aeration head arrangement densities is obtained, and the relationship between SOTE and k L a L is obtained;

[0015] S3, according to the relationship between SOTE and k L a L , the relationship between k L a L and the gas supply amount is fitted and obtained;

[0016] S4, according to the relationship between k L a L and the gas supply amount, the influence parameter relationship formula of the arrangement density of the aeration head on k L a L is obtained;

[0017] S5, the relationship formula in S3 and S4 is combined with the mass balance calculation formula in S1, and the value of the aeration gas supply amount Q air is obtained;

[0018] Wherein, SOTE is the standard oxygen transfer efficiency, k L is the mass transfer coefficient of oxygen in the liquid, a L is the gas mass transfer surface area per unit liquid volume.

[0019] In some embodiments, the mass balance calculation formula in step S1 is:

[0020]

[0021] Wherein, is the mass change rate of oxygen in the liquid;

[0022] Q in is the flow rate of the liquid flowing into the reactor, C in，T is the concentration of oxygen in the liquid flowing into the reactor at temperature T;

[0023] Q is the flow rate of the liquid flowing out of the reactor, CT Let T be the concentration of oxygen in the reactor and the liquid flowing out of the reactor.

[0024] α is the mass transfer coefficient correction parameter, and F is the aeration head contamination correction parameter;

[0025] k L Let a be the mass transfer coefficient of oxygen in a liquid. L This refers to the gas mass transfer surface area per unit volume of liquid.

[0026] C T The oxygen concentration in the reactor and the liquid exiting the reactor at temperature T. This represents the saturation concentration of oxygen at temperature T.

[0027] V L This represents the volume of liquid in the reactor;

[0028] ∑R represents the net oxygen consumption rate in the reactor.

[0029] In some implementations, in step S2, SOTE and k L a L The relationship is represented as:

[0030]

[0031] Where SOTE is the standard oxygen mass transfer efficiency, M 氧 The amount of oxygen required;

[0032] In some embodiments, in step S3, formula (2) is converted to obtain k under different aeration head arrangement densities. L a L and

[0033] The relationship between the air supply of a single aerator head and the amount of air is fitted to obtain k. L a L Relationship with gas supply:

[0034] k L a L =b·U sg Y (3)

[0035] Where Y is the fitting coefficient, which is related to the type of aeration head;

[0036] U sg U is the gas supply per unit surface area of ​​the reactor. sg =Q air / A, where A is the surface area of ​​the reactor, Q air For gas supply;

[0037] b represents the aeration head arrangement density relative to k. L a L The parameters that affect the outcome.

[0038] In some implementations, the density of the aeration heads varies depending on the k value. L a L The influence relationship is shown by parameter b for aeration.

[0039] The function of head arrangement density, fitted to obtain the following formula:

[0040] b = b1·DD 0.25 +b2 (4)

[0041] Among them, b1 and b2 are fitting coefficients, which are related to the type of aeration head;

[0042] DD represents the density of aeration heads.

[0043] In some implementations, by combining formulas (1), (3), and (4), the following formula is obtained:

[0044]

[0045] or

[0046] SOTR represents actual oxygen demand.

[0047] Substituting the performance parameters b1, b2, and Y of the aeration head into formulas (5) and (6), we can obtain Q. air The value of .

[0048] In some embodiments, the values ​​of the performance parameters b1, b2, and Y of the aeration head vary depending on the orifice diameter d of the aeration head, and the specific values ​​are as follows:

[0049] When the aeration head has coarse holes, 2mm≤d≤10mm, the fitting parameters are b1=0.05, b2=0.42, and Y=1.05;

[0050] When the aeration head has fine pores, 0.5mm≤d<2mm, the fitting parameters are b1=2.57, b2=0.043, and Y=0.82;

[0051] When the aeration head uses an elastic diaphragm with micropores, 0.5mm ≤ d < 2mm, the fitting parameters are b1 = 1.24, b2 = 0.90.

[0052] Y = 0.88.

[0053] This invention also provides a method for calculating the aeration supply for wastewater treatment, comprising the following steps:

[0054] The gas supply volume is calculated using the following formula:

[0055]

[0056] wherein Q in is the flow rate into the reactor, C in，T is the concentration of oxygen in the liquid flowing into the reactor at temperature T;

[0057] Q is the flow rate out of the reactor, C T is the concentration of oxygen in the liquid flowing out of the reactor at temperature T;

[0058] a is a mass transfer coefficient correction parameter, F is a diffuser fouling correction parameter;

[0059] k L is the mass transfer coefficient of oxygen in the liquid, a L is the gas mass transfer surface area per unit liquid volume;

[0060] C T is the concentration of oxygen in the liquid flowing into and out of the reactor at temperature T, is the saturation concentration of oxygen at temperature T;

[0061] V L is the liquid volume in the reactor;

[0062] ∑R is the net oxygen consumption rate in the reactor;

[0063] Y is a fitting coefficient related to the diffuser type;

[0064] A is the surface area of the reactor, Q air is the air supply;

[0065] b1, b2 are fitting coefficients related to the diffuser type;

[0066] DD is the diffuser arrangement density;

[0067] The above parameter values are brought into the formula, thereby obtaining the value of the air supply Q air .

[0068] In some embodiments, the performance parameters b1, b2 and Y of the diffuser have different values according to the diffuser aperture d, and the specific values are as follows:

[0069] When the diffuser is a coarse hole, 2mm≤d≤10mm, the fitting parameters b1=0.05, b2=0.42, and Y=1.05;

[0070] When the diffuser is a fine hole, 0.5mm≤d<2mm, the fitting parameters b1=2.57, b2=0.043, and Y=0.82;

[0071] When the aeration head adopts the elastic diaphragm micropore, 0.5mm≤d<2mm, fitting parameter b1=1.24, b2=0.90,

[0072] Y=0.88.

[0073] In some embodiments, the method further comprises

[0074] Wherein, SOTR is the actual oxygen demand.

[0075] A computer storage medium, characterized in that the storage medium stores a program, wherein the program causes the processor to execute the computing method in the above technical solutions when the program is run by the processor.

[0076] The sewage treatment aeration gas supply amount calculation method and storage medium provided by the application, by calculating the sewage treatment aeration gas supply amount, considering the influence of the size of the oxygen mass transfer driving force, the performance of the aeration head and the temperature, gas pressure and other factors affecting the saturated dissolved oxygen, avoiding the error caused by using a single SOTE, avoiding the problem caused by using a safety factor, and achieving accurate calculation of the aeration gas supply amount. BRIEF DESCRIPTION OF DRAWINGS

[0077] Figure 1 is the relationship between the aeration head SOTE and the single aeration head gas supply amount;

[0078] Figure 2 is the relationship between k L a L and the single aeration head gas supply amount. DETAILED DESCRIPTION

[0079] In order to make the purpose, technical scheme and advantages of the embodiments of the application clearer, the technical scheme in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the application. The following embodiments are used to illustrate the application, but not to limit the scope of the application.

[0080] In the description of the application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the application.

[0081] In the description of the present application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0082] The present application will be described in detail below with reference to the accompanying drawings.

[0083] In the sewage treatment process, the calculation of the air supply amount is divided into two important links: the first is to calculate the actual oxygen demand in biochemical treatment, that is, to calculate the oxygen required for oxidizing pollutants and maintaining dissolved oxygen per unit volume and per unit time according to the organic pollutants and Kjeldahl nitrogen load in the incoming water. The second is to comprehensively consider the environmental and aeration equipment air supply efficiency to calculate the actual required air supply amount, and the finally calculated air supply amount should meet the oxygen demand in the treatment process.

[0084] The traditional method calculates the oxygen demand by using the formula: The oxygen demand obtained by calculation needs to be provided, wherein the standard state is 1 atm and the temperature is 20 DEG C;

[0085] Wherein, SOTE is the standard oxygen transfer efficiency, M 氧 is the required oxygen amount, and SOTR is the actual oxygen demand.

[0086] In view of the numerous disadvantages of the traditional method, the present application provides a new sewage treatment aeration air supply amount calculation method, and the specific scheme comprises the following steps:

[0087] S1, a mass balance calculation formula of the oxygen change rate in the liquid phase is established;

[0088] S2, according to the characteristics of different aeration heads, the relationship between SOTE and the air supply amount of a single aeration head under different aeration head arrangement densities is obtained, and the relationship between SOTE and k L a L is obtained;

[0089] S3, according to the relationship between SOTE and k L a L , the relationship between k L a L and the air supply amount is fitted and obtained;

[0090] S4, according to the relationship between k L a L and the air supply amount, the influence of the arrangement density of the aeration head on k L a LThe influence parameter relationship formula of the aeration air supply amount Q

[0091] S5, combining the relationship formula in S3 and S4 with the mass balance calculation formula in S1, obtaining the aeration air supply amount Q air The value of the aeration air supply amount Q

[0092] Wherein, SOTE is the standard oxygen transfer efficiency, k L is the mass transfer coefficient of oxygen in the liquid, a L is the gas mass transfer surface area per unit volume of liquid.

[0093] Specifically, in some embodiments, during the biochemical reaction process, the process of oxygen mass transfer from the air supplied by the device to the water and utilized by microorganisms is controlled by liquid mass transfer, the oxygen in the gas is uniformly distributed and constant, the gas phase mass transfer part can be ignored, and the saturated dissolved oxygen concentration in the liquid is considered to be constant, therefore, the mass balance calculation formula of the change rate of oxygen in the liquid phase can be:

[0094]

[0095] Wherein, is the mass change rate of oxygen in the liquid, in the steady state, the mass change rate of oxygen in the liquid is zero;

[0096] Q in is the flow rate of the liquid flowing into the reactor, C in，T is the concentration of oxygen in the liquid flowing into the reactor at temperature T;

[0097] Q is the flow rate of the liquid flowing out of the reactor, C T is the concentration of oxygen in the liquid of the reactor and the liquid flowing out of the reactor at temperature T, it should be noted that the concentration of oxygen in the liquid of the reactor and the liquid flowing out of the reactor is the same;

[0098] α is the mass transfer coefficient correction parameter, F is the aeration head pollution correction parameter;

[0099] k L is the mass transfer coefficient of oxygen in the liquid, a L is the gas mass transfer surface area per unit volume of liquid;

[0100] C T is the concentration of oxygen in the liquid of the reactor and the liquid flowing out of the reactor at temperature T, is the saturated concentration of oxygen at temperature T;

[0101] V L is the liquid volume in the reactor;

[0102] ∑R is the net oxygen consumption rate in the reactor.

[0103] Wherein, [Qin ·C in,T -Q·C T [This represents the net rate of oxygen input and output in the liquid phase;]

[0104] The oxygen transfer rate from the gas phase to the liquid phase;

[0105] In the formula, the value of ∑R can be calculated by using the model to comprehensively calculate the oxygen demand of each aerobic biochemical reaction step and then calculating its total amount.

[0106] In the formula, The oxygen mass transfer efficiency is closely related to the performance of the aerator heads. The impact of aerator heads on oxygen mass transfer can be observed through aeration experiments and actual operation of aerobic bioreactors. For example, in coarse-pore aeration, the denser the aerator head arrangement, the lower the oxygen mass transfer efficiency; while in fine-pore or micro-pore aeration, the denser the aerator head arrangement, the higher the oxygen mass transfer efficiency. Furthermore, the larger the air supply of a single aerator head, the lower the oxygen mass transfer efficiency; however, the decrease in oxygen mass transfer efficiency in micro-pore aeration is slower than in fine-pore aeration. When calculating the air supply, it is currently impossible to quantitatively describe the various influences related to aerator head performance. This invention describes the performance of different aerator heads using three parameters and quantitatively incorporates these parameters into the calculation of the air supply using a calculation formula.

[0107] In aeration experiments, a series of SOTE values ​​can be obtained. These SOTE values ​​are closely related to the air supply and the density of the aeration heads. Through aeration experiments, different density values ​​were obtained. Figure 1 The relationship between the SOTE of the aeration head and the air supply of a single aeration head is shown. For example, curves of SOTE versus air supply of a single aeration head at 20℃ are shown when the arrangement density DD is 25% and 4%, based on formula (1) and formula (2). We can obtain:

[0108]

[0109] Where SOTE is the standard oxygen mass transfer efficiency, M 氧 This refers to the amount of oxygen required.

[0110] Further analysis reveals that transforming formula (2) yields... Figure 2 The following k shows different aeration head arrangement densities. L a L The relationship between k and the air supply of a single aerator head is illustrated exemplarily, showing different aerator head arrangement densities at DD of 25% and 4%. L a L The curve relationship between the air supply of a single aerator head and the air volume of a single aerator head, and then... Figure 2 The curve shown is fitted to obtain k. L aL Relationship between the air supply and the relationship:

[0111] k L a L = b·U sg Y (3)

[0112] Wherein, Y is a fitting coefficient, related to the type of aeration head;

[0113] U sg is the air supply per unit surface area of the reactor, U sg = Q air / A, A is the surface area of the reactor, Q air is the air supply;

[0114] b is the influence parameter of the aeration head arrangement density on k L a L .

[0115] Since the different arrangement densities of the aeration head have a significant influence on k L a L , the influence of the arrangement density of the aeration head on k L a L is embodied by the parameter b, and the fitting relationship is obtained as follows:

[0116] b = b1·DD 0.25 +b2 (4)

[0117] Wherein, b1 and b2 are fitting coefficients, related to the type of aeration head;

[0118] DD is the arrangement density of the aeration head.

[0119] Since, in the steady-state liquid, the change rate of dissolved oxygen is zero, the following formula is obtained through the formula (1), (3), (4):

[0120]

[0121] Or

[0122] Wherein, SOTR is the actual oxygen demand;

[0123] The performance parameters b1, b2 and Y of the aeration head are brought into the formula (5), (6), and the value of Q air is obtained.

[0124] Specifically, the Q airThe value is obtained by formula (5) and formula (6), and the size of the oxygen mass transfer driving force, i.e. the difference between the saturated dissolved oxygen and the set value of the dissolved oxygen in the reactor, is also considered, and the greater the driving force, the more favorable for oxygen mass transfer, at the same time, the influence of temperature on the saturated dissolved oxygen is also considered, and the important influence of the gas supply amount on the performance of the aeration head is also considered, i.e. b1, b2 and Y are used to represent different types of aeration heads, so as to avoid the problems caused by the use of a single SOTE calculation and the use of a safety factor in the traditional calculation method.

[0125] In some embodiments, in particular, the values of the performance parameters b1, b2 and Y of the aeration head are different according to the different aeration head hole diameters d, and the specific values are as follows:

[0126] When the aeration head is a coarse hole, 2mm≤d≤10mm, the fitting parameters are b1=0.05, b2=0.42 and Y=1.05;

[0127] When the aeration head is a fine hole, 0.5mm≤d<2mm, the fitting parameters are b1=2.57, b2=0.043 and Y=0.82;

[0128] When the aeration head adopts an elastic diaphragm micro-hole, 0.5mm≤d<2mm, the fitting parameters are b1=1.24, b2=0.90 and Y=0.88.

[0129] The aeration head is a common aeration hole with a constant hole diameter, and when the aeration head adopts an elastic diaphragm micro-hole, the elastic diaphragm micro-hole aeration hole can change the hole diameter of the aeration hole according to the size of the airflow, and the change range is 0.5-2mm.

[0130] The values of the performance parameters b1, b2 and Y of the aeration head are obtained according to the performance parameters of the common aeration head or by using a new aeration head for aeration experiment.

[0131] The application also provides a computer storage medium, which stores a program, wherein the program makes a processor execute the above-mentioned calculation method when the program is run by the processor. The above-mentioned calculation method is imported into a computer device as a computer program, and the computer program in the computer storage medium is run by the computer device, so as to realize the wastewater treatment aeration gas supply amount calculation method of the application.

[0132] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application, and any person skilled in the art can make some minor changes or modifications to the above-mentioned technical content as equivalent embodiments with equivalent changes without departing from the technical solution of the present application. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, which does not depart from the technical solution of the present application, still belongs to the scope of the present application.

Claims

1. A method for calculating the aeration supply for wastewater treatment, characterized in that, Includes the following steps: S1. Establish a mass balance calculation formula for the rate of change of oxygen in the liquid phase; S2. Based on the characteristics of different aeration heads, obtain the relationship between SOTE and the air supply of a single aeration head under different aeration head arrangement densities, and obtain the relationship between SOTE and k. L a L Relationship; S3, based on SOTE and k L a L The relationship is fitted to obtain k L a L The relationship between gas supply and volume; S4, based on the obtained k L a L The relationship between the aeration head density and the air supply is used to obtain the relationship between the aeration head density and the air supply density. L a L The relationship between the influencing parameters; S5. Combine the relationships in S3 and S4 with the mass balance calculation formula in S1 to obtain the aeration supply Q. air of value; Where SOTE is the standard oxygen mass transfer efficiency, k L Let a be the mass transfer coefficient of oxygen in a liquid. L It represents the gas mass transfer surface area per unit volume of liquid.

2. The method for calculating the aeration supply for wastewater treatment as described in claim 1, characterized in that, The mass balance calculation formula in step S1 is: in, The rate of change of oxygen mass in the liquid; Q in C is the flow rate into the reactor. in，T The concentration of oxygen in the liquid flowing into the reactor at temperature T; Q is the flow rate out of the reactor, C T Let T be the concentration of oxygen in the reactor and the liquid flowing out of the reactor. α is the mass transfer coefficient correction parameter, and F is the aeration head contamination correction parameter; k L Let a be the mass transfer coefficient of oxygen in a liquid. L This refers to the gas mass transfer surface area per unit volume of liquid. C T The oxygen concentration in the reactor and the liquid exiting the reactor at temperature T. Let T be the saturation concentration of oxygen at temperature T. V L This represents the volume of liquid in the reactor; ∑R represents the net oxygen consumption rate in the reactor.

3. The method for calculating the aeration supply for wastewater treatment as described in claim 1 or 2, characterized in that, In step S2, SOTE and k L a L The relationship is represented as: Where SOTE is the standard oxygen mass transfer efficiency, M 氧 The amount of oxygen required.

4. The method for calculating the aeration supply for wastewater treatment as described in claim 3, characterized in that, In step S3 Formula (2) is converted to obtain k under different aeration head arrangement densities. L a L The relationship between k and the air supply of a single aerator head is fitted to obtain k. L a L Relationship with gas supply: k L a L =b·U sg Y (3) Where Y is the fitting coefficient, which is related to the type of aeration head; U sg U is the gas supply per unit surface area of ​​the reactor. sg =Q air / A, where A is the surface area of ​​the reactor, Q air b is the air supply volume; b is the aeration head arrangement density relative to k. L a L The parameters that affect the outcome.

5. The method for calculating the aeration supply for wastewater treatment as described in claim 4, characterized in that, Depending on the aeration head arrangement density, k L a L The influence relationship is obtained by fitting the following formula through parameter b as a function of the aeration head arrangement density: b=b1·DD 0.25 +b2 (4) Among them, b1 and b2 are fitting coefficients, which are related to the type of aeration head; DD represents the density of aeration head arrangement.

6. The method for calculating the aeration supply for wastewater treatment as described in claim 5, characterized in that, Combining formulas (1), (3), and (4), we obtain the following formula: or SOTR represents actual oxygen demand; Substituting the performance parameters b1, b2, and Y of the aeration head into formulas (5) and (6), we can obtain Q. air The value of .

7. The method for calculating the aeration supply for wastewater treatment as described in claim 5 or 6, characterized in that, The values ​​of the performance parameters b1, b2 and Y of the aeration head vary depending on the orifice diameter d of the aeration head. The specific values ​​are as follows: When the aeration head has a coarse orifice, 2mm≤d≤10mm, the fitting parameters are b1=0.05, b2=0.42, and Y=1.

05. When the aeration head has fine pores, 0.5mm≤d<2mm, the fitting parameters are b1=2.57, b2=0.043, and Y=0.82; When the aeration head uses an elastic diaphragm with micropores, 0.5mm ≤ d < 2mm, the fitting parameters are b1 = 1.24, b2 = 0.

90. Y＝0.88。 8. A method for calculating the aeration supply for wastewater treatment, characterized in that, Includes the following steps: The gas supply volume is calculated using the following formula: or Among them, Q in C is the flow rate into the reactor. in，T Let T be the concentration of oxygen in the liquid flowing into the reactor at temperature T; Q be the flow rate flowing out of the reactor; and C be the oxygen concentration in the liquid flowing into the reactor at temperature T. T α represents the oxygen concentration in the reactor and the liquid effluent from the reactor at temperature T; α is the mass transfer coefficient correction parameter, and F is the aerator head fouling correction parameter. k L Let a be the mass transfer coefficient of oxygen in a liquid. L This refers to the gas mass transfer surface area per unit volume of liquid. C T The oxygen concentration in the reactor and the liquid exiting the reactor at temperature T. Let T be the saturation concentration of oxygen at temperature T. V L This represents the volume of liquid in the reactor; ∑R represents the net oxygen consumption rate in the reactor; Y is the fitting coefficient, which is related to the type of aeration head; A is the surface area of ​​the reactor, Q air For gas supply; b1 and b2 are fitting coefficients, which are related to the type of aeration head; DD represents the aeration head density; Substituting the above parameter values ​​into the formula, we can obtain the aeration supply Q. air The value of .

9. The method for calculating the aeration supply for wastewater treatment as described in claim 8, characterized in that, The values ​​of the performance parameters b1, b2, and Y of the aeration head vary depending on the orifice diameter d of the aeration head, and the specific values ​​are as follows: When the aeration head has coarse holes, 2mm≤d≤10mm, the fitting parameters are b1=0.05, b2=0.42, and Y=1.05; When the aeration head has fine pores, 0.5mm≤d<2mm, the fitting parameters are b1=2.57, b2=0.043, and Y=0.82; When the aeration head uses an elastic diaphragm with micropores, 0.5mm ≤ d < 2mm, the fitting parameters are b1 = 1.24, b2 = 0.

90. Y＝0.88。 10. A computer storage medium, characterized in that, The storage medium stores a program, wherein when the program is run by a processor, the processor causes the processor to perform the computational processing method according to any one of claims 1 to 9.

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