CN112573641A - Sewage treatment capacity determining method and device - Google Patents
Sewage treatment capacity determining method and device Download PDFInfo
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- CN112573641A CN112573641A CN202011312265.7A CN202011312265A CN112573641A CN 112573641 A CN112573641 A CN 112573641A CN 202011312265 A CN202011312265 A CN 202011312265A CN 112573641 A CN112573641 A CN 112573641A
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Abstract
The invention provides a method and a device for determining sewage treatment capacity, wherein the method comprises the following steps: acquiring a biological inhibition index value of the sewage to be treated; comparing the biological inhibitive index value of the sewage to be treated with a preset threshold value, wherein the preset threshold value is determined according to the treatment capacity of the sewage to be discharged into a sewage treatment system; and determining the amount of water allowed to enter the sewage treatment system to be discharged according to the comparison result. The biological inhibition index value is determined according to the treatment capacity of the sewage treatment system to be discharged, so that the water volume allowed to enter the sewage treatment system to be discharged is determined according to the comparison result and is within the treatment capacity range of the sewage treatment system to be discharged, after the water volume determined according to the comparison result enters the sewage treatment system to be discharged, the sewage treatment system to be discharged has the capacity of timely treating the biological inhibition sewage, and the sewage treatment effect and the treatment efficiency of the sewage treatment system to be discharged cannot be influenced by the sewage to be treated.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a method and a device for determining sewage treatment capacity.
Background
The main mode of industrial park sewage treatment is that sewage is pretreated in an enterprise, and discharged into a park comprehensive sewage treatment plant after the sewage meets the take-over requirement of the park comprehensive sewage treatment plant, and the sewage is treated by the sewage treatment plant. The pipe connection requirements of the sewage treatment plant are mainly conventional indexes such as chemical oxygen demand, ammonia nitrogen, total phosphorus and the like, for example, many industrial parks require that the chemical oxygen demand of sewage discharged into a garden comprehensive sewage treatment plant pipe network by enterprises in the area is lower than 400mg/L or 500 mg/L.
However, even if the sewage discharged into the sewage treatment plant meets the conditions and meets the take-over requirements of the sewage treatment plant, some sewage has biological inhibitory property or biological toxicity, and after an enterprise directly discharges the sewage which is not treated by the biological inhibitory property or biological toxicity into the sewage treatment plant at one time, due to the limitation of the treatment capacity of the sewage treatment plant, when the biological inhibitory property or biological toxicity contained in the sewage cannot be treated in time, the biological inhibitory property or biological toxicity in the water damages organisms used in the treatment process flow of the sewage treatment plant, influences the sewage treatment effect of the sewage treatment plant, reduces the treatment efficiency of the sewage treatment plant, and simultaneously influences the normal operation of the sewage treatment plant.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defects that the sewage treatment mode in the prior art cannot timely treat the biological inhibition or biological toxicity contained in the sewage, the sewage treatment effect of a sewage treatment plant is affected, and the sewage treatment efficiency is reduced, so as to provide a method and a device for determining the sewage treatment capacity.
The invention provides a sewage treatment capacity determination method in a first aspect, which comprises the following steps: acquiring a biological inhibition index value of the sewage to be treated; comparing the biological inhibitive index value of the sewage to be treated with a preset threshold value, wherein the preset threshold value is determined according to the treatment capacity of the sewage to be discharged into a sewage treatment system; and determining the amount of water allowed to enter the sewage treatment system to be discharged according to the comparison result.
Alternatively, in a sewage treatment amount determining method provided by the present invention, determining an amount of water allowed to enter a sewage treatment system to be discharged includes: when the biological inhibition index value of the sewage to be treated is smaller than a preset threshold value, acquiring the actual water quality characteristic corresponding to the sewage to be treated with a first preset water quantity; inputting actual water quality characteristics corresponding to the sewage to be treated with the first preset water quantity into a wastewater biological treatment mathematical model to be discharged into a sewage treatment system, wherein the mathematical model is obtained by modeling in advance, and obtaining first theoretical water quality characteristics of the sewage to be treated with the first preset water quantity; and when the first theoretical water quality characteristic meets the preset treatment condition, taking the first preset water quantity as the water quantity allowed to enter the sewage treatment system to be discharged.
Optionally, in the sewage treatment amount determining method provided by the present invention, the determining of the amount of water allowed to enter the sewage treatment system to be discharged further includes: when the biological inhibition index value of the sewage to be treated is greater than or equal to a preset threshold value, acquiring a first water quality sample characteristic of the sewage to be treated of a first preset water quantity and a second water quality sample characteristic to be discharged into a sewage treatment system; updating model parameters in the wastewater biological treatment mathematical model according to the first water quality sample characteristic and the second water quality sample characteristic to obtain an updated wastewater biological treatment mathematical model; inputting the actual water quality characteristic of the first preset water quantity into the updated mathematical model for biological wastewater treatment to obtain a second theoretical water quality characteristic of the wastewater to be treated of the first preset water quantity; and when the second theoretical water quality characteristic meets the preset treatment condition, taking the first preset water quantity as the water quantity allowed to enter the sewage treatment system to be discharged.
Optionally, the method for determining the sewage treatment amount provided by the invention further comprises the following steps: when the theoretical water quality characteristics obtained by using the updated wastewater biological treatment mathematical model do not meet the preset treatment conditions, sending a sewage treatment notice to a sewage production enterprise, wherein the sewage treatment notice comprises a notice for treating the biological inhibitory index; and calculating a first theoretical water quality characteristic or a second theoretical water quality characteristic according to the biological inhibition index value of the sewage to be treated and the actual water quality characteristic of the first preset water quantity until the first theoretical water quality characteristic or the second theoretical water quality characteristic meets the preset treatment condition.
Optionally, the method for determining the sewage treatment amount provided by the invention further comprises the following steps: when the first theoretical water quality characteristic or the second theoretical water quality characteristic does not meet the preset treatment condition, acquiring the actual water quality characteristic corresponding to the sewage to be treated with a second preset water quantity, wherein the second preset water quantity is smaller than the first preset water quantity; calculating a third theoretical water quality characteristic according to the biological inhibitive index value of the sewage to be treated and the actual water quality characteristic corresponding to the sewage to be treated of the second preset water quantity; and when the third theoretical water quality characteristic meets the preset treatment condition, taking the second preset water quantity as the water quantity allowed to enter the sewage treatment system to be discharged.
Optionally, the method for determining the sewage treatment amount provided by the invention further comprises the following steps: and when the third theoretical water quality characteristic does not meet the preset treatment condition, sending a sewage treatment notice to a sewage production enterprise, wherein the sewage treatment notice comprises a notice for treating the biological inhibitory index.
Optionally, in the method for determining sewage treatment amount provided by the present invention, the model parameters include a heterotrophic bacteria maximum specific growth rate, an autotrophic bacteria maximum specific growth rate and a heterotrophic bacteria yield coefficient.
A second aspect of the present invention provides a sewage treatment amount determination apparatus comprising: the to-be-treated sewage analysis module is used for acquiring a biological inhibition index value of the to-be-treated sewage; the comparison module is used for comparing the biological inhibitive index value of the sewage to be treated with a preset threshold value, wherein the preset threshold value is determined according to the treatment capacity of the sewage to be discharged into the sewage treatment system; and the sewage treatment capacity determining module is used for determining the water capacity allowed to enter the sewage treatment system to be discharged according to the comparison result.
A third aspect of the present invention provides a computer apparatus comprising: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to perform the method of determining water treatment capacity according to the first aspect of the present invention.
A fourth aspect of the present invention provides a computer-readable storage medium characterized in that the computer-readable storage medium stores computer instructions for causing a computer to execute the sewage treatment amount determining method according to the first aspect of the present invention.
The technical scheme of the invention has the following advantages:
1. the invention provides a sewage treatment capacity determining method, which comprises the steps of firstly obtaining a biological inhibition index value of sewage to be treated, comparing the biological inhibition index value with a preset threshold value, and finally determining the amount of water allowed to enter a sewage treatment system according to a comparison result.
2. According to the method for determining the sewage treatment capacity, toxic organic matters in the sewage can cause damage to organisms to be discharged into a sewage treatment system when the biostatic index value of the sewage to be treated is larger than or equal to the preset threshold value, so that a mathematical model for biological treatment of the sewage to be discharged into the sewage treatment system obtained through modeling in advance can also change The second theoretical water quality characteristic is more accurate, and the finally obtained water amount allowed to enter the sewage treatment system also more conforms to the treatment capacity of the sewage treatment system to be discharged.
3. When the biological inhibitive index value of the sewage to be treated is larger than the preset threshold value, when the theoretical water quality characteristics obtained by using the updated mathematical model for the biological treatment of the wastewater do not meet the preset treatment conditions, sending a sewage treatment notification to a sewage production enterprise, wherein the sewage treatment notification comprises a notification for treating the biological inhibitory index, and the biological inhibition index value of the sewage to be treated and the water quality characteristic of the first preset water quantity are obtained again until the first theoretical water quality characteristic or the second theoretical water quality characteristic obtained by calculation according to the biological inhibition index value and the actual water quality of the first preset water quantity meet the preset treatment condition, by sending the sewage treatment notice to the sewage producing enterprise, the sewage producing enterprise treats the biological inhibition index of the sewage to be treated, can avoid the damage of the sewage to be treated with larger bio-inhibitory index value to the sewage treatment system to be discharged.
4. The invention provides a sewage treatment capacity determining device, which firstly obtains a biological inhibition index value of sewage to be treated, compares the biological inhibition index value with a preset threshold value, and finally determines the amount of water allowed to enter a sewage treatment system according to a comparison result.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flowchart showing a specific example of a sewage treatment amount determining method according to an embodiment of the present invention;
FIG. 2 is a flowchart showing another specific example of the sewage treatment amount determining method according to the embodiment of the present invention;
FIG. 3 is a flowchart showing still another specific example of the sewage treatment amount determining method according to the embodiment of the present invention;
FIG. 4 is a schematic block diagram showing a specific example of the sewage treatment amount determining apparatus according to the embodiment of the present invention;
fig. 5 is a schematic block diagram of a specific example of a computer device in the embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment of the invention provides a method for determining sewage treatment capacity, which comprises the following steps as shown in figure 1:
step S10: and acquiring a biological inhibition index value of the sewage to be treated.
In an alternative embodiment, the bio-inhibitory index value of the wastewater to be treated refers to one or more indexes that may cause damage to organisms used in a treatment process to be discharged into the wastewater treatment system, for example, the bio-inhibitory index value may include one or more of an oxygen consumption rate inhibition rate, a nitrification rate inhibition rate, and the like.
Step S20: and comparing the biological inhibitive index value of the sewage to be treated with a preset threshold value, wherein the preset threshold value is determined according to the treatment capacity of the sewage to be discharged into a sewage treatment system.
Since different sewage treatment systems have different treatment capacities for the biologically inhibitory sewage, the preset threshold value can be determined according to the treatment capacity to be discharged into the sewage treatment system, so that the calculated amount of sewage allowed to enter the sewage treatment system to be discharged also more matches the treatment capacity to be discharged into the sewage treatment system. In one embodiment, the preset threshold may be set to 30%, that is, when the biostatic index value of the sewage to be treated is greater than or equal to 30%, the biostatic index value of the sewage to be treated is greater than or equal to the preset threshold, otherwise, the biostatic index value of the sewage to be treated is less than the preset threshold.
Step S30: and determining the amount of water allowed to enter the sewage treatment system to be discharged according to the comparison result.
The method for determining the sewage treatment capacity comprises the steps of obtaining a biological inhibition index value of sewage to be treated, comparing the biological inhibition index value with a preset threshold value, and finally determining the amount of water allowed to enter a sewage treatment system according to a comparison result.
In an alternative embodiment, as shown in fig. 2, the step S30 specifically includes:
when the biological inhibition index value of the sewage to be treated is less than a preset threshold value, executing the following steps:
step S31: the actual water quality characteristics corresponding to the to-be-treated sewage of the first preset water amount are obtained, in a specific embodiment, the actual water quality characteristics of the to-be-treated sewage of different water amounts are different, and therefore when the to-be-treated sewage of different water amounts is analyzed, the actual water quality characteristics of the to-be-treated sewage of different water amounts need to be calculated respectively.
Step S32: and inputting the actual water quality characteristics corresponding to the sewage to be treated of the first preset water quantity into a wastewater biological treatment mathematical model to be discharged into a sewage treatment system, which is obtained by modeling in advance, so as to obtain the first theoretical water quality characteristics of the sewage to be treated of the first preset water quantity.
In a specific embodiment, the mathematical Model for biological wastewater treatment is obtained by simulating a biological wastewater treatment mathematical Model such as a biowin (envirosim Associates ltd) Model, an Activated Sludge Model (ASM) Model and the like in combination with an operation parameter to be discharged into a wastewater treatment system.
The first theoretical water quality characteristic refers to the water quality characteristic of an effluent result obtained after the wastewater to be discharged into the wastewater treatment system is treated by the wastewater to be discharged into the wastewater treatment system with the first preset water quantity and is predicted by a wastewater biological treatment mathematical model. The first theoretical water quality characteristic comprises one or more indexes of ammonia nitrogen content, total nitrogen content (TN), total phosphorus content (TP), total suspended solid content (TSS), chemical oxygen demand (TCOD), Biochemical Oxygen Demand (BOD), pH value (pH) and the like of an effluent result after the effluent result is treated by the sewage treatment system to be discharged.
When the first theoretical water quality characteristic satisfies the preset treatment condition, executing the step S33: the first predetermined amount of water is used as the amount of water admitted to the sewage treatment system to be discharged.
The sewage to be discharged into the sewage treatment system needs to be discharged after the sewage to be treated is treated, so the preset treatment condition can be set through the discharge standard. When the first theoretical water quality obtained through the water quality characteristics of the first preset water quantity meets the preset treatment condition, the first theoretical water quality indicates that after the sewage to be treated of the first preset water quantity enters the sewage treatment system to be discharged, the water outlet result of the sewage to be discharged into the sewage treatment system meets the discharge standard, and the first preset water quantity can be used as the water quantity allowed to enter the sewage treatment system to be discharged.
When the first theoretical water quality characteristic does not meet the preset treatment condition, as shown in fig. 2, the following steps are performed:
step S39: the actual water quality characteristics corresponding to the sewage to be treated with the second preset water amount are obtained, the second preset water amount is smaller than the first preset water amount, in a specific implementation, the actual water quality characteristics of different water amounts are different, and the smaller the water amount of the sewage to be treated entering the sewage treatment system to be discharged is, the better the sewage to be discharged can be treated by the sewage treatment system to be discharged, so that after the sewage to be treated with a larger water amount enters the sewage treatment system to be discharged, the obtained actual water quality characteristics do not meet the preset treatment conditions, the discharge amount can be reduced, and the actual water quality characteristics are calculated again.
Step S310: and calculating a third theoretical water quality characteristic according to the biological inhibitive index value of the sewage to be treated and the actual water quality characteristic corresponding to the sewage to be treated of the second preset water quantity. In the embodiment of the invention, the first theoretical water quality characteristic is obtained by calculation according to the to-be-treated sewage with the biological inhibition index value smaller than the preset threshold, and after the water amount is reduced, the biological inhibition index value of the to-be-treated sewage is still smaller than the preset threshold, so that the actual water quality characteristic corresponding to the to-be-treated sewage with the reduced second preset water amount can be directly input into a pre-established wastewater biological treatment mathematical model to obtain the third theoretical water quality characteristic.
When the third theoretical water quality characteristic satisfies the preset treatment condition, executing step S311: the second predetermined amount of water is used as the amount of water admitted to the sewage treatment system to be discharged.
In an alternative embodiment, after the step S310 is executed, if the third theoretical water quality characteristic does not satisfy the preset processing condition, the step S38 is executed: sending a sewage treatment notification to a sewage producing enterprise, the sewage treatment notification including a notification to treat the bio-inhibitory indicator.
In a specific embodiment, when the third theoretical water quality characteristic does not satisfy the preset treatment condition, step S38 may be not executed, but step S38 may be executed to continuously obtain the actual characteristic value of the to-be-treated sewage with a smaller water volume, and the theoretical water quality characteristic of the effluent result to be discharged into the sewage treatment system is repeatedly calculated according to the bio-inhibitory index value of the to-be-treated sewage and the actual water quality characteristic corresponding to the to-be-treated sewage with the reduced water volume until the theoretical water quality characteristic satisfies the preset treatment condition or the reduced water volume value is smaller than the preset value, the adjustment of the water volume is finished, when the theoretical water quality characteristic satisfies the preset treatment condition, the water volume value may be determined as the water volume allowed to enter the sewage treatment system, and if the water volume value is smaller than the preset value, the corresponding theoretical water quality characteristic still does not satisfy the preset treatment condition, the above step S38 is executed to send a sewage treatment notification to the sewage producing company.
Specifically, the preset value may be determined according to a treatment cycle of a sewage treatment plant and a sewage output of a sewage output enterprise per unit time, the unit time may be the same as a duration of the treatment cycle of the sewage treatment plant, and in order to avoid that the sewage to be treated cannot be timely discharged into the sewage treatment plant and accumulated for a long time, the preset value may be set to a value smaller than an amount of the sewage discharged by the sewage output enterprise per unit time, for example, if the treatment cycle of the sewage to be treated by the sewage treatment plant is three days and the average amount of the sewage to be treated discharged by the sewage output enterprise per three days is 6 tons, the preset value may be set to a value greater than or equal to 6 tons or larger, taking the preset value as 6 tons as an example, and when the value of the water amount when the theoretical water quality characteristic satisfies the preset treatment condition is greater than or equal to 6 tons, the value of the water amount at this time may be determined as, and if the theoretical water quality characteristics still do not meet the preset treatment conditions when the water quantity value is reduced to 6 tons, executing the step S38 and sending a sewage treatment notice to a sewage output enterprise.
In a specific embodiment, the process of establishing a wastewater biological treatment mathematical model to be discharged into a sewage treatment system comprises three steps of preliminary simulation, simulation correction and simulation verification, wherein the wastewater biological treatment mathematical models such as BioWin and ASM are adopted to simulate the wastewater biological treatment mathematical model to be discharged into the sewage treatment system to obtain an initial model; secondly, modifying key parameters of waste water biological treatment mathematical models such as BioWin, ASM and the like by adopting a sensitivity analysis method according to a prediction result and an actual water outlet result of the initial model, and correcting the initial model; and finally, verifying the corrected model according to the actual operation data to be discharged into the sewage treatment system, determining the model as a wastewater biological treatment mathematical model to be discharged into the sewage treatment system when the verification result meets the use condition of the model, and reselecting other mathematical models to simulate the wastewater biological treatment mathematical model to be discharged into the sewage treatment system when the verification result does not meet the use condition of the model, or continuously modifying key parameters in the model by a sensitive analysis method until the verification result meets the use condition of the model.
In an alternative embodiment, as shown in fig. 2 or 3, when the bio-inhibitory index value of the sewage to be treated is greater than or equal to the preset threshold value, the following steps are performed:
step S34: the method comprises the steps of obtaining a first water quality sample characteristic of the sewage to be treated with a first preset water quantity and a second water quality sample characteristic of the sewage to be discharged into a sewage treatment system.
Step S35: and updating the model parameters in the wastewater biological treatment mathematical model according to the first water quality sample characteristics and the second water quality sample characteristics to obtain an updated wastewater biological treatment mathematical model.
When the biological inhibitive index value of the sewage to be treated is less than the preset threshold value, the influence of toxic organic matters in the sewage to be treated on the sewage to be discharged into a sewage treatment system is small, can be ignored, therefore, the adjustment of the waste water biological treatment mathematical model is not needed, but when the biological inhibitive index value of the waste water to be treated is larger than or equal to the preset threshold value, toxic organic matters in the sewage to be treated can cause damage to organisms to be discharged into the sewage treatment system for treating the sewage, the treatment capacity of the sewage to be discharged into the sewage treatment system can be correspondingly changed, therefore, the model parameters in the mathematical model for biological treatment of wastewater need to be updated according to the first water quality sample characteristics and the second water quality sample characteristics, in an alternative embodiment, the model parameters include a heterotrophic maximum specific growth rate, an autotrophic maximum specific growth rate, and a heterotrophic productivity factor.
Step S36: inputting the actual water quality characteristic of the first preset water quantity into the updated wastewater biological treatment mathematical model to obtain a second theoretical water quality characteristic of the wastewater to be treated of the first preset water quantity, and for details of the second theoretical water quality characteristic, reference may be made to the description of the first theoretical water quality characteristic in step S32.
When the second theoretical water quality characteristic satisfies the preset treatment condition, executing step S37: the first predetermined amount of water is taken as the amount of water allowed to enter the sewage treatment system to be discharged into the sewage treatment system, and the above description of the step S33 is referred to in detail.
According to the method for determining the sewage treatment capacity provided by the embodiment of the invention, when the biological inhibition index value of the sewage to be treated is greater than or equal to the preset threshold value, toxic organic matters in the sewage can cause damage to organisms to be discharged into the sewage treatment system, so that the mathematical model for biological treatment of the sewage to be discharged into the sewage treatment system obtained by modeling in advance can also change, in the invention, the model parameters in the mathematical model for biological treatment of the sewage are updated according to the first water quality sample characteristic of the sewage to be treated of a first preset water quantity and the second water quality sample characteristic of the sewage to be discharged into the sewage treatment system to obtain the updated mathematical model for biological treatment of the sewage, the updated mathematical model for biological treatment of the sewage can more accurately simulate the running state of the sewage to be discharged into the sewage treatment system after the sewage to be treated with the biological inhibition index value of the pipe being greater than the preset threshold, therefore, the second theoretical water quality characteristic of the sewage to be treated of the first preset water quantity obtained according to the updated mathematical model for the biological treatment of the wastewater is more accurate, and the finally obtained water quantity allowed to enter the sewage treatment system also better conforms to the treatment capacity of the sewage treatment system to be discharged.
In an alternative embodiment, as shown in fig. 2 and 3, after the step S36 is executed, if the theoretical water quality characteristic obtained by using the updated mathematical model for biological treatment of wastewater does not satisfy the predetermined treatment condition, the step S38 may be executed, or the step S39 may be executed, and in an embodiment, any one of the above manners may be selected.
In an alternative embodiment, as shown in fig. 2, if the theoretical water quality characteristics obtained by using the updated mathematical model for biological wastewater treatment do not satisfy the preset treatment conditions, the following steps may be performed:
step S38: and sending a sewage treatment notice to a sewage output enterprise, wherein the sewage treatment notice comprises a notice for treating the biological inhibitory index, and the sewage output enterprise can preprocess the sewage to be treated after receiving the sewage treatment notice so as to reduce the biological inhibitory index of the sewage to be treated.
After the step S38 is executed, the bio-inhibitory index value of the sewage to be treated and the actual water quality characteristic of the first preset water amount are obtained again, and the first theoretical water quality characteristic or the second theoretical water quality characteristic is calculated according to the bio-inhibitory index value of the sewage to be treated and the actual water quality characteristic of the first preset water amount until the first theoretical water quality characteristic or the second theoretical water quality characteristic meets the preset treatment condition.
In the method for determining the sewage treatment capacity provided by the embodiment of the invention, when the biological inhibitive index value of the sewage to be treated is greater than the preset threshold value, if the theoretical water quality characteristics obtained by using the updated mathematical model for the biological treatment of the wastewater do not meet the preset treatment conditions, sending a sewage treatment notification to a sewage production enterprise, wherein the sewage treatment notification comprises a notification for treating the biological inhibitory index, and the biological inhibition index value of the sewage to be treated and the water quality characteristic of the first preset water quantity are obtained again until the first theoretical water quality characteristic or the second theoretical water quality characteristic obtained by calculation according to the biological inhibition index value and the actual water quality of the first preset water quantity meet the preset treatment condition, by sending the sewage treatment notice to the sewage producing enterprise, the sewage producing enterprise treats the biological inhibition index of the sewage to be treated, can avoid the damage of the sewage to be treated with larger bio-inhibitory index value to the sewage treatment system to be discharged.
In an alternative embodiment, as shown in fig. 3, after the step S36 is executed, if the second theoretical water quality characteristic does not satisfy the preset processing condition, the following steps may be executed:
step S39: the actual water quality characteristics corresponding to the sewage to be treated with the second preset water amount are obtained, the second preset water amount is smaller than the first preset water amount, in a specific implementation, the actual water quality characteristics of different water amounts are different, and the smaller the water amount of the sewage to be treated entering the sewage treatment system to be discharged is, the better the sewage to be discharged can be treated by the sewage treatment system to be discharged, so that after the sewage to be treated with a larger water amount enters the sewage treatment system to be discharged, the obtained actual water quality characteristics do not meet the preset treatment conditions, the discharge amount can be reduced, and the actual water quality characteristics are calculated again.
Step S310: and calculating a third theoretical water quality characteristic according to the biological inhibitive index value of the sewage to be treated and the actual water quality characteristic corresponding to the sewage to be treated of the second preset water quantity. In the embodiment of the present invention, the second theoretical water quality characteristic is calculated according to the to-be-treated sewage whose biostatic index value is greater than or equal to the preset threshold, and even if the water amount is reduced, the biostatic index value of the to-be-treated sewage is not smaller than the preset threshold, so that the model parameters in the mathematical model for biological treatment of wastewater need to be updated again according to the water quality sample characteristic of the to-be-treated sewage of the second preset water amount and the water quality sample characteristic of the to-be-treated sewage to be discharged into the wastewater treatment system, and the third theoretical water quality characteristic is calculated according to the updated mathematical model for biological treatment of wastewater and the water quality characteristic of the to-be-treated sewage of the.
When the third theoretical water quality characteristic satisfies the preset treatment condition, executing step S311: the second predetermined amount of water is used as the amount of water admitted to the sewage treatment system to be discharged.
In an alternative embodiment, after step S310, if the third theoretical water quality characteristic does not satisfy the predetermined treatment condition, step S38 is executed to send a sewage treatment notification to a sewage producing enterprise, where the sewage treatment notification includes a notification of treatment of the bio-inhibitory indicator.
In a specific embodiment, when the third theoretical water quality characteristic does not satisfy the preset treatment condition, step S38 may be not executed temporarily, but the actual characteristic value of the to-be-treated sewage with a smaller water volume may be obtained continuously, the theoretical water quality characteristic of the effluent result to be discharged into the sewage treatment system may be calculated repeatedly according to the bio-inhibitory index value of the to-be-treated sewage and the actual water quality characteristic corresponding to the to-be-treated sewage with the reduced water volume until the theoretical water quality characteristic satisfies the preset treatment condition or the value of the reduced water volume is smaller than the preset value, the adjustment of the water volume is finished, when the value of the water volume when the theoretical water quality characteristic satisfies the preset treatment condition is greater than or equal to the preset value, the value of the water volume at that time may be determined as the water volume allowed to enter the sewage treatment system, and when the value of the water volume is smaller than the preset value, the corresponding theoretical water quality characteristic, step S38 is executed to send a sewage treatment notification to the sewage producing company.
Example 2
An embodiment of the present invention provides a specific example of determining the amount of water admitted to a sewage treatment system using the sewage treatment amount determination method provided in example 1 above.
Sampling dozens of drainage nodes in the park, and respectively analyzing the oxygen consumption rate inhibition rate and nitrification inhibition rate of each water sample. The analysis method of the inhibition rate of the oxygen consumption rate is referred to ISO 8192:2007, and the analysis method of the nitrification inhibition is referred to ISO 9509: 2006. The analysis result shows that the oxygen consumption rate inhibition rate and nitrification inhibition rate of the waste water produced by crotonaldehyde (the waste water is incinerated by production enterprises in the park at present and is not discharged into a comprehensive sewage treatment plant in the park) exceed 30 percent.
A BioWin numerical simulation software is adopted to model a park comprehensive sewage treatment plant, the comprehensive sewage treatment plant is a sewage treatment system to be discharged in the embodiment 1, the comprehensive sewage treatment plant is continuously monitored for 4 months during modeling, the software-default heterotrophic bacteria maximum specific growth rate, autotrophic bacteria maximum specific growth rate and heterotrophic bacteria yield coefficient are adopted to carry out preliminary simulation to obtain a preliminary simulation model, theoretical water quality characteristics and actual water quality characteristics of an effluent result obtained according to the preliminary simulation model are compared and analyzed, the comparison result is shown in the following table 1, and indexes with large deviation are focused in a model correction link.
TABLE 1
The simulation errors of ammonia nitrogen, TN, TSS and TCOD are large, so that the kinetic parameters and the stoichiometric parameters related to the ammonia nitrogen, TN, TSS and TCOD need to be corrected. And (3) carrying out sensitivity analysis on related parameters in BioWin, increasing and decreasing the parameters by 10%, and inspecting the change condition of the effluent water quality index. With an error of less than 10%, the adjusted kinetic and stoichiometric parameters are shown in table 2 below.
TABLE 2
And forming an adjusted model according to the adjusted kinetic parameters, the adjusted stoichiometric parameters and the initial model, and then verifying the corrected model according to the average operation data of the comprehensive sewage treatment plant for 1 month outside the modeling period. The verification result shows that the established model can accurately simulate the operation condition of the comprehensive sewage treatment plant.
Because the bio-inhibitory index value of the crotonaldehyde wastewater is large, the water quantity ratio of the inlet water of the comprehensive sewage treatment plant to the crotonaldehyde wastewater needs to be 500: 1. 1000: 1 and 2000:1, respectively measuring the maximum specific growth rate of heterotrophic bacteria, the maximum specific growth rate of autotrophic bacteria and the yield coefficient of heterotrophic bacteria.
(1) Maximum specific growth rate mu of heterotrophic bacteriaHThe measurement method (2) is as follows:
sludge pretreatment: placing 2L of sludge-water mixture at the tail end of an aeration tank of a park comprehensive sewage treatment plant in a 5L glass beaker, standing for a period of time, discharging supernatant, adding distilled water to the original volume, continuously and fully aerating for a period of time, stopping aeration, standing for precipitation, and repeating the steps for 2-3 times.
Effluent of a secondary sedimentation tank of a park comprehensive sewage treatment plant and crotonaldehyde wastewater are mixed according to the proportion of 500: 1. 1000: 1 and 2000: mixing at a ratio of 1, and calling as a sewage sample.
Adding a certain amount of treated sludge and sewage sample into the reactor according to the determined sludge load for mixing (adding a proper amount of heterotrophic bacteria according to the proportion of 100:5:1 for ensuring that the heterotrophic bacteria are in the maximum ratio growth stateSodium acetate, ammonium sulfate, potassium dihydrogen phosphate, and a wastewater sample). During testing, the reactor is subjected to high-strength intermittent large-amount aeration, so that Dissolved Oxygen (DO) is increased to about 8mg/L, oxygenation is stopped, a dissolved oxygen meter is used for measuring the dissolved oxygen reading, a dissolved oxygen meter probe is fixed after stabilization, the reactor is sealed, the dissolved oxygen reading is recorded, and aeration is carried out again when the dissolved oxygen is reduced to 2 mg/L. The change of the dissolved oxygen is recorded all the way after the times are repeated until the oxygen uptake/utilization rate (OUR) does not rise any more. Calculating according to OUR to obtain muH。
(2) Maximum specific growth rate mu of autotrophic bacteriaAUTThe measurement method (2) is as follows:
sludge pretreatment: placing 2L of sludge-water mixture at the tail end of an aeration tank of a park comprehensive sewage treatment plant in a 5L glass beaker, standing for a period of time, discharging supernatant, adding distilled water to the original volume, continuously and fully aerating for a period of time, stopping aeration, standing for precipitation, and repeating the steps for 2-3 times.
Effluent of a secondary sedimentation tank of a park comprehensive sewage treatment plant and crotonaldehyde wastewater are mixed according to the proportion of 500: 1. 1000: 1 and 2000: mixing at a ratio of 1, and calling as a sewage sample. The sewage sample was aerated for 3 hours before the test to avoid excessive organic load affecting the nitrification reaction. Mixing a sewage sample and the treated sludge according to a certain proportion, putting the mixture into a 3L reactor to ensure that the initial sludge concentration is about 100mg/L, adding ammonia nitrogen into the reactor to ensure that autotrophic bacteria grow at the maximum speed until the concentration is about 50mg/L, and adding 7.245g/L NaN3So as to eliminate the influence of Nitrite Oxidizing Bacteria (NOB), and HCl is added to adjust the pH value to be between 7.5 and 8.0. The reactor is placed on a constant-temperature magnetic stirrer, the influence of temperature and microorganism adhesion is eliminated, good mixing of mixed liquid in the container is guaranteed, continuous and sufficient aeration is carried out in the reactor, the dissolved oxygen concentration of 7mg/L is maintained, continuous reaction is carried out for 4-5 days, samples are taken from the reactor twice every day to measure the concentration of nitrite nitrogen, and the sampling time interval of the two times is 6 hours so that the measurement is more accurate.
To be provided with
As ordinate, timeFor the abscissa, linear regression is performed on the data to obtain the slope, and μ is calculatedAUT。
(3) Heterotrophic bacteria yield coefficient YHThe measurement method (2) is as follows:
the productivity coefficient of heterotrophic bacteria was determined by intermittent respirometry.
Sludge pretreatment: placing 2L of sludge-water mixture at the tail end of an aeration tank of a park comprehensive sewage treatment plant in a 5L glass beaker, standing for a period of time, discharging supernatant, adding distilled water to the original volume, continuously and fully aerating for a period of time, stopping aeration, standing for precipitation, and repeating the steps for 2-3 times.
Effluent of a secondary sedimentation tank of a park comprehensive sewage treatment plant and crotonaldehyde wastewater are mixed according to the proportion of 500: 1. 1000: 1 and 2000: mixing at a ratio of 1, and calling as a sewage sample. Adding a proper amount of zinc sulfate solution into the sewage sample, flocculating and precipitating, and filtering by using a 0.45 mu m filter membrane to obtain a water sample.
Adding a certain amount of pretreated sludge into a 2L reaction container, and adding 20mg/L ATU to be mixed with the treated water sample in order to avoid the influence of nitrification on oxygen consumption rate. Samples were taken quickly and after flocculation precipitation with the addition of a suitable amount of zinc sulphate solution, they were filtered through a 0.45 μm filter and their initial soluble Biochemical Oxygen Demand (BOD) was determined. And (3) carrying out short-time high-intensity aeration on the reactor, measuring the DO reading by using a dissolved oxygen meter, fixing a probe of the dissolved oxygen meter after the DO reading is stable, sealing the reactor, and recording the reading of the dissolved oxygen until the DO is equal to 2mg/L, and carrying out aeration again. The change in oxygen consumption rate in the reactor was closely monitored using a dissolved oxygen meter and the above procedure was repeated until the oxygen utilization efficiency (OUR) was approximately a straight line (at which time the microorganisms reached endogenous respiration status), the experiment was stopped and samples were immediately taken to determine the dissolved COD at the end of the reaction. OUR of each time is calculated, OUR is used as ordinate, time is used as abscissa for plotting to obtain curve of OUR along with time, the area enclosed by the curve, endogenous respiration rate line and ordinate is calculated, and Y is calculated by formulaH。
According to the analysis method, the water quantity ratio of the inlet water of the comprehensive sewage treatment plant to the crotonaldehyde wastewater is 500: 1. 1000: 1 and2000: at 1, the measured heterotrophic bacteria yield coefficients (gCOD/gCOD) are 0.791, 0.769 and 0.758 respectively, and the maximum specific growth rate (d) of the ammonia oxidizing bacteria-1) 0.644, 0.661 and 0.691 respectively, the maximum specific growth rate (d) of heterotrophic bacteria-1) 2.303, 2.396, and 2.616, respectively. The water quantity ratio of the inlet water of the comprehensive sewage treatment plant to the crotonaldehyde wastewater is 500: 1. 1000: 1 and 2000: the water quality characteristic components at 1 hour, the measured heterotrophic bacteria yield coefficient, the autotrophic bacteria maximum specific growth rate and the heterotrophic bacteria maximum specific growth rate are respectively recorded into a verified model for scene simulation, and the results are shown in the following table 3.
TABLE 3
Under the water quantity ratios of the inlet water of different comprehensive sewage treatment plants to the crotonaldehyde wastewater, the ammonia nitrogen can meet the requirements of the emission standard; under the ratio of 2000:1, the TCOD of the effluent of the secondary sedimentation tank is 102mg/L, the TCOD cannot meet the requirement of the discharge standard after being treated by the advanced treatment unit, and the effluent needs to be pretreated firstly if the effluent is discharged into a comprehensive sewage treatment plant.
Example 3
An embodiment of the present invention provides a sewage treatment amount determination apparatus, as shown in fig. 4, including:
the module 10 for analyzing the sewage to be treated is used to obtain the bio-inhibitory index value of the sewage to be treated, and the details are described in the above embodiment 1 for step S10.
A comparison module 20, configured to compare the bio-inhibitory index value of the sewage to be treated with a preset threshold, where the preset threshold is determined according to the treatment capacity of the sewage to be discharged into the sewage treatment system, and the details of the comparison module are described in the above embodiment 1 for step S20.
And a sewage treatment amount determining module 30 for determining the amount of water allowed to enter the sewage treatment system according to the comparison result, the details of which are described in the above embodiment 1 for step S30.
The sewage treatment capacity determining device provided by the embodiment of the invention firstly obtains the biological inhibition index value of the sewage to be treated, compares the biological inhibition index value with the preset threshold value, and finally determines the water quantity allowed to enter the sewage treatment system according to the comparison result.
Example 4
An embodiment of the present invention provides a computer device, as shown in fig. 5, the computer device mainly includes one or more processors 41 and a memory 42, and one processor 41 is taken as an example in fig. 5.
The computer device may further include: an input device 43 and an output device 44.
The processor 41, the memory 42, the input device 43 and the output device 44 may be connected by a bus or other means, and fig. 5 illustrates the connection by a bus as an example.
The processor 41 may be a Central Processing Unit (CPU). The Processor 41 may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or combinations thereof. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The memory 42 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the sewage treatment amount determination apparatus, and the like. Further, the memory 42 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory 42 optionally includes a memory remotely located from the processor 41, and these remote memories may be connected to the sewage treatment amount determination device via a network. The input device 43 may receive a calculation request (or other numerical or character information) input by a user and generate a key signal input related to the sewage treatment amount determination device. The output device 44 may include a display device such as a display screen for outputting the calculation result.
Example 5
Embodiments of the present invention provide a computer-readable storage medium storing computer instructions, where the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions can execute the sewage treatment capacity determination method in any of the above method embodiments. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD), a Solid State Drive (SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A sewage treatment capacity determining method is characterized by comprising the following steps:
acquiring a biological inhibition index value of the sewage to be treated;
comparing the biostatic index value of the sewage to be treated with a preset threshold value, wherein the preset threshold value is determined according to the treatment capacity of the sewage to be discharged into a sewage treatment system;
and determining the amount of water allowed to enter the sewage treatment system to be discharged according to the comparison result.
2. The method of claim 1, wherein determining the amount of water admitted to the wastewater treatment system based on the comparison comprises:
when the biological inhibition index value of the sewage to be treated is smaller than a preset threshold value, acquiring the actual water quality characteristic corresponding to the sewage to be treated with a first preset water quantity;
inputting the actual water quality characteristics corresponding to the sewage to be treated of the first preset water quantity into a wastewater biological treatment mathematical model to be discharged into a sewage treatment system, wherein the mathematical model is obtained by modeling in advance, and obtaining first theoretical water quality characteristics of the sewage to be treated of the first preset water quantity;
and when the first theoretical water quality characteristic meets a preset treatment condition, taking the first preset water quantity as the water quantity allowed to enter the sewage treatment system to be discharged.
3. The method of claim 1, wherein determining the amount of water admitted to the wastewater treatment system based on the comparison comprises:
when the biological inhibitive index value of the sewage to be treated is greater than or equal to a preset threshold value, acquiring a first water quality sample characteristic of the sewage to be treated of a first preset water quantity and a second water quality sample characteristic to be discharged into a sewage treatment system;
updating model parameters in the wastewater biological treatment mathematical model according to the first water quality sample characteristics and the second water quality sample characteristics to obtain an updated wastewater biological treatment mathematical model;
inputting the actual water quality characteristic of the first preset water quantity into the updated mathematical model for biological wastewater treatment to obtain a second theoretical water quality characteristic of the wastewater to be treated of the first preset water quantity;
and when the second theoretical water quality characteristic meets the preset treatment condition, taking the first preset water amount as the water amount allowed to enter the sewage treatment system to be discharged.
4. The method of claim 3, further comprising:
when the theoretical water quality characteristics obtained by using the updated wastewater biological treatment mathematical model do not meet the preset treatment conditions, sending a sewage treatment notice to a sewage production enterprise, wherein the sewage treatment notice comprises a notice for treating a biological inhibitory index;
and calculating a first theoretical water quality characteristic or a second theoretical water quality characteristic according to the biological inhibition index value of the sewage to be treated and the actual water quality characteristic of the first preset water quantity until the first theoretical water quality characteristic or the second theoretical water quality characteristic meets the preset treatment condition.
5. The method of claim 3, further comprising:
when the first theoretical water quality characteristic or the second theoretical water quality characteristic does not meet the preset treatment condition, acquiring the actual water quality characteristic corresponding to the sewage to be treated with a second preset water quantity, wherein the second preset water quantity is smaller than the first preset water quantity;
calculating a third theoretical water quality characteristic according to the biological inhibitive index value of the sewage to be treated and the actual water quality characteristic corresponding to the sewage to be treated of the second preset water quantity;
and when the third theoretical water quality characteristic meets the preset treatment condition, taking the second preset water amount as the water amount allowed to enter the sewage treatment system to be discharged.
6. The method of claim 5, further comprising:
and when the third theoretical water quality characteristic does not meet the preset treatment condition, sending a sewage treatment notice to a sewage production enterprise, wherein the sewage treatment notice comprises a notice for treating the biological inhibitory index.
7. The method of claim 3, wherein the model parameters include a heterotrophic maximum specific growth rate, an autotrophic maximum specific growth rate, and a heterotrophic productivity factor.
8. A sewage treatment amount determining apparatus, characterized by comprising:
the to-be-treated sewage analysis module is used for acquiring a biological inhibition index value of the to-be-treated sewage;
the comparison module is used for comparing the biological inhibition index value of the sewage to be treated with a preset threshold value, wherein the preset threshold value is determined according to the treatment capacity of the sewage to be discharged into the sewage treatment system;
and the sewage treatment capacity determining module is used for determining the water capacity allowed to enter the sewage treatment system to be discharged according to the comparison result.
9. A computer device, comprising:
at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to perform the wastewater treatment capacity determination method of any of claims 1-7.
10. A computer-readable storage medium storing computer instructions for causing a computer to execute the sewage treatment amount determination method according to any one of claims 1 to 7.
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