CN116431976B - Sewage treatment plant and pipe network efficiency calculation method and device considering external water - Google Patents
Sewage treatment plant and pipe network efficiency calculation method and device considering external water Download PDFInfo
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- 239000010865 sewage Substances 0.000 title claims abstract description 439
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 238
- 238000004364 calculation method Methods 0.000 title claims abstract description 106
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 165
- 231100000719 pollutant Toxicity 0.000 claims abstract description 165
- 238000000034 method Methods 0.000 claims abstract description 69
- 230000008595 infiltration Effects 0.000 claims abstract description 32
- 238000001764 infiltration Methods 0.000 claims abstract description 32
- 244000144972 livestock Species 0.000 claims description 68
- 244000144977 poultry Species 0.000 claims description 66
- 238000009395 breeding Methods 0.000 claims description 34
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- 239000008235 industrial water Substances 0.000 claims description 19
- 239000004973 liquid crystal related substance Substances 0.000 claims description 18
- 238000012423 maintenance Methods 0.000 claims description 18
- 239000010842 industrial wastewater Substances 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 5
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 239000011574 phosphorus Substances 0.000 claims description 5
- 239000002351 wastewater Substances 0.000 claims description 5
- 230000007613 environmental effect Effects 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 description 10
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000009360 aquaculture Methods 0.000 description 1
- 244000144974 aquaculture Species 0.000 description 1
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- 239000003657 drainage water Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
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Abstract
The application relates to the field of sewage treatment, in particular to a sewage treatment plant taking external water into consideration and a pipe network efficiency calculation method and device. The content of the calculation method is to execute the following steps for the data of the pollutants in the calculation period: calculating the theoretical infiltration rate R Theoretical infiltration rate The method comprises the steps of carrying out a first treatment on the surface of the Calculating pollutant quantity M of super-receiving external water of sewage treatment plant Super-receiving pollutant from external water The method comprises the steps of carrying out a first treatment on the surface of the Calculating the effective collection amount M of pollutants of a sewage treatment plant Effective collection of pollutants in sewage plants The method comprises the steps of carrying out a first treatment on the surface of the Calculating the total collection amount Q of domestic sewage of the sewage plant in the calculation period Life collection The method comprises the steps of carrying out a first treatment on the surface of the And calculating the pipe network collection efficiency alpha and the sewage plant operation efficiency beta. The alpha and beta obtained by the algorithm can reflect the states of the pipe network and the sewage treatment plant more truly, and further make corresponding measures, so that the water environment quality is continuously improved, and the method has good environmental benefit and economic benefit.
Description
Technical Field
The application relates to the field of sewage treatment, in particular to a sewage treatment plant taking external water into consideration and a pipe network efficiency calculation method and device.
Background
The current condition that the sewage is not well collected and treated is an important factor for restricting the water environment quality of the area, especially the improvement of the urban water environment quality. The existing sewage plant operation load index is that only the inflow water quantity of the sewage plant is divided by the existing scale of the sewage plant, and whether the treatment capacity of the sewage plant meets the requirements or not is only seen from apparent data, but the corresponding water quantity and pollutants of the sewage collection system, which are introduced by the external water such as urban source pollution, initial rainwater, underground water, river water and the like, are not considered. The influence of external water is difficult to eliminate in a short time, but the influence can cause the virtual high operation load of the sewage treatment plant, blindly expand the scale of the sewage treatment plant and waste a large amount of manpower and material resources. Meanwhile, the false phenomenon that the sewage collection rate is high is caused, even the unreasonable phenomenon that the collected sewage exceeds the sewage production amount is caused, and the problem that the sewage is not practically completely collected is ignored because the external water is not introduced and partially deducted.
Disclosure of Invention
Under the original pipe network collection and sewage plant treatment capacity evaluation system, when the collected water quantity of the sewage pipe network is close to the sewage quantity discharged by the area, the area pipe network is considered to be reasonable in distribution and good in quality, and the pipe network is not required to be established and maintained on a large scale; however, by the method, the external water occupying the original collecting capacity is stripped, so that the effective water collecting quantity of the pipe network is obtained, the relation between the sewage actually collected by the sewage pipe network and the sewage discharged by the area is evaluated, and the pipe network blank area of the found area and the pipe network area to be inspected and maintained are inspected in time. The method is used for evaluating the construction and operation conditions of pipe networks in different areas, finds out a large number of areas with virtual high collection capacity of the pipe networks and low collection efficiency of the actual pipe networks, pertinently carries out new construction, detection and repair of the pipe networks, and improves the collection efficiency of the sewage pipe networks in a high-efficiency and low-carbon manner.
Under the original pipe network collection and sewage plant treatment capacity evaluation system, when the water yield of a sewage treatment plant approaches or even exceeds the treatment scale of the sewage treatment plant, the sewage treatment plant is considered to be urgently needed to be expanded or newly built; however, by the method, the external water occupying the original treatment capacity is stripped, and in practice, the sewage to be treated in the area does not exceed the capacity of a sewage treatment plant, so that the urgent need is not to expand the treatment scale. The method is being used for evaluating the necessity evaluation of the capacity extension of sewage treatment facilities in different areas, the condition that the operation load of a plurality of sewage treatment plants is pseudo-saturated is found, the effective operation load of the sewage treatment plants is obtained after the evaluation by the method, and the extension or new construction is implemented aiming at the sewage treatment plants with higher effective load, so that the purposes of high-efficiency low-carbon construction treatment capacity scale and scientific sewage treatment are achieved.
In order to comprehensively and objectively reflect the effective sewage treatment condition, a set of sewage treatment plant and pipe network efficiency calculation method is urgently needed to be constructed, the actual collection treatment efficiency of the sewage treatment plant and the pipe network is comprehensively analyzed by utilizing the calculation result, the relationship between the new construction and repair of the pipe network and the new construction and extension of the sewage treatment plant is balanced, the sewage collection treatment capacity is effectively improved with low carbon, and the water environment quality is improved.
According to the first aspect of the application, a sewage treatment plant and pipe network efficiency calculation method taking external water into consideration is provided, and the collection efficiency alpha of the pipe network and the operation efficiency beta of the sewage treatment plant in the water collection range of the sewage treatment plant are calculated by collecting water collection data of the sewage treatment plant and drainage data for pollution sources (industry, livestock and poultry cultivation and life) in the water collection range of the sewage treatment plant in the same time period, so that the influence of external water introduced pollutants on apparent operation data of the sewage treatment plant can be avoided, and the actual working efficiency of the sewage treatment plant and the pipe network thereof is evaluated. The specific technical scheme is as follows:
the application provides a sewage treatment plant taking external water into consideration and a pipe network efficiency calculation method, which aim at the data of pollutants in a calculation period, and comprises the following steps:
s1: calculating the theoretical infiltration rateR Theoretical infiltration rate The calculation formula is as follows:
；
wherein, the liquid crystal display device comprises a liquid crystal display device,
Q inlet water of sewage plant The actual total inflow of the sewage treatment plant in the period is calculated;
Q industrial drainage The method is used for calculating the total sewage discharge amount of industrial enterprises in the water receiving range of the sewage treatment plant in the period;
Q domestic sewage generation The method is to calculate the total amount of domestic sewage generated in the water receiving range of the sewage treatment plant in a period;
Q livestock and poultry breeding drainage The method is used for calculating the total amount of sewage of a large-scale livestock and poultry farm collected by a sewage treatment plant in a period;
s2: calculating pollutant quantity M of super-receiving external water of sewage treatment plant Super-receiving pollutant from external water The method comprises the steps of carrying out a first treatment on the surface of the The calculation formula is as follows:
when (when)R Theoretical infiltration rate When less than or equal to 10%, M Super-receiving pollutant from external water =0；
When (when)R Theoretical infiltration rate Greater than 10% >:
when C Inlet water of sewage plant When < low contaminant concentration threshold:
；
when the low pollutant concentration threshold value is less than or equal to C Inlet water of sewage plant When < ideal contaminant concentration threshold:
;
when C Inlet water of sewage plant When the concentration threshold value of ideal pollutant is not less than:
M super-receiving pollutant from external water =0；
Wherein C is Inlet water of sewage plant Refers to calculating the average concentration of pollutants in water entering a sewage treatment plant in a period;
s3: calculating the effective collection amount M of pollutants of a sewage treatment plant Effective collection of pollutants in sewage plants The calculation formula is as follows:
M effective collection of pollutants in sewage plants =M Collecting pollutants in sewage plants -M Super-receiving pollutant from external water ；
Wherein M is Collecting pollutants in sewage plants The calculation formula for the pollutant amount collected by the sewage treatment plant is as follows:
M collecting pollutants in sewage plants = Q Inlet water of sewage plant ×C Inlet water of sewage plant ；
S4: calculating the total collection amount Q of domestic sewage of the sewage plant in the calculation period Life collection The calculation formula is as follows:
;
wherein M is Industrial drainage pollutants = Q Industrial drainage ×C Industrial drainage ，M Drainage pollutant for livestock and poultry cultivation = Q Livestock and poultry breeding drainage ×C Livestock and poultry breeding drainage ；
Wherein, the liquid crystal display device comprises a liquid crystal display device,
C industrial drainage The method is to calculate the average concentration of the pollutants of industrial wastewater in the water receiving range of the sewage treatment plant in the period;
C livestock and poultry breeding drainage The method is used for calculating the average pollutant concentration of sewage of a large-scale livestock and poultry farm collected by a sewage treatment plant in a period;
C checking concentration Checking the concentration of domestic sewage;
M industrial drainage pollutants The amount of industrial wastewater contaminants collected for a sewage treatment plant;
M drainage pollutant for livestock and poultry cultivation The amount of the wastewater pollutants in the livestock and poultry cultivation collected by the sewage treatment plant;
s5: the pipe network collection efficiency alpha and the sewage plant operation efficiency beta are calculated according to the following calculation formula:
α=(Q life collection +Q Industrial drainage +Q Livestock and poultry breeding drainage )/Q Inlet water of sewage plant ；
β=(Q Life collection +Q Industrial drainage +Q Livestock and poultry breeding drainage )/Q Treatment scale of sewage plant ；
Wherein Q is Treatment scale of sewage plant Is the build-up scale of the sewage treatment plant, and refers to the daily rated water inflow of the sewage treatment plant multiplied by the calculation period to represent the treatment capacity of the sewage treatment plant.
Preferably, the contaminants include chemical oxygen demand COD, BOD 5 Any one or more of total phosphorus, ammonia nitrogen and total nitrogen.
Preferably, the pollutant is COD, the threshold value of the low pollutant concentration is 260 mg/L, and the threshold value of the ideal pollutant concentration is 350mg/L, C Checking concentration The value of (C) is 350mg/L.
Preferably, the Q Industrial drainage The calculation formula is as follows:
Q industrial drainage =Q Industrial water ×K1 Coefficient of industrial sewage discharge ，
Wherein Q is Industrial water Refers to calculating the total amount of industrial water in the water receiving range of the sewage treatment plant in the period,
K1 coefficient of industrial sewage discharge Refers to the industrial sewage discharge coefficient, is obtained by using the existing calculation method according to the historical data,
the Q is Domestic sewage generation The calculation formula is as follows:
Q domestic sewage generation =Q Domestic water ×K2 The production coefficient of domestic sewage is calculated,
wherein Q is Domestic water Refers to calculating the total amount of resident comprehensive domestic water in the water collecting range of the sewage treatment plant in the period,
K2 coefficient of domestic sewage generation Is a domestic sewage generation coefficient, and the value range is 0.8-0.9.
Preferably, the method further comprises the following steps:
s6: according to the values of alpha and beta, sending maintenance information for a pipe network and a sewage treatment plant, wherein the specific mode is as follows:
when alpha is more than or equal to 80 percent, the information that the pipe network needs routine maintenance is prompted,
when the alpha is more than 60 percent and less than 80 percent, the information that the pipe network needs to carry out the planned maintenance is prompted,
when alpha is less than or equal to 60 percent, the information that the pipe network needs comprehensive maintenance is prompted,
when beta is more than 80 percent, the information that the sewage treatment plant needs to be expanded is indicated,
when beta is more than or equal to 60 percent and less than or equal to 80 percent, prompting the information that the scale of the sewage treatment plant meets the requirement,
when beta is less than 60%, prompting the sewage treatment plant to enlarge the water receiving range and improve the water receiving amount.
The application also provides a sewage treatment plant taking external water into consideration and a pipe network efficiency calculating device, wherein the data of pollutants in a calculating period comprise the following steps:
theoretical infiltration rate calculation module: calculating the theoretical infiltration rateR Theoretical infiltration rate The calculation formula is as follows:
;
wherein, the liquid crystal display device comprises a liquid crystal display device,
Q inlet water of sewage plant The actual total inflow of the sewage treatment plant in the period is calculated;
Q industrial drainage The method is used for calculating the total sewage discharge amount of industrial enterprises in the water receiving range of the sewage treatment plant in the period;
Q domestic sewage generation The method is to calculate the total amount of domestic sewage generated in the water receiving range of the sewage treatment plant in a period;
Q livestock and poultry breeding drainage The method is used for calculating the total amount of sewage of a large-scale livestock and poultry farm collected by a sewage treatment plant in a period;
and a pollutant amount calculating module for receiving the external water excessively: calculating pollutant quantity M of super-receiving external water of sewage treatment plant Super-receiving pollutant from external water The method comprises the steps of carrying out a first treatment on the surface of the The calculation formula is as follows:
when (when)R Theoretical infiltration rate When less than or equal to 10%, M Super-receiving pollutant from external water =0；
When (when)R Theoretical infiltration rate Greater than 10% >:
when C Inlet water of sewage plant When < low contaminant concentration threshold:
;
when the low pollutant concentration threshold value is less than or equal to C Inlet water of sewage plant When < ideal contaminant concentration threshold:
;
when C Inlet water of sewage plant When the concentration threshold value of ideal pollutant is not less than:
M super-receiving pollutant from external water =0；
Wherein C is Inlet water of sewage plant Refers to calculating the average concentration of pollutants in water entering a sewage treatment plant in a period;
and a pollutant effective collection amount calculation module: calculation of pollutants in a wastewater treatment plantEffective collection amount M Effective collection of pollutants in sewage plants The calculation formula is as follows:
M effective collection of pollutants in sewage plants =M Collecting pollutants in sewage plants -M Super-receiving pollutant from external water ；
Wherein M is Collecting pollutants in sewage plants The calculation formula for the pollutant amount collected by the sewage treatment plant is as follows:
M collecting pollutants in sewage plants = Q Inlet water of sewage plant ×C Inlet water of sewage plant ；
The domestic sewage collection total amount calculation module: calculating the total collection amount Q of domestic sewage of the sewage plant in the calculation period Life collection The calculation formula is as follows:
wherein M is Industrial drainage pollutants = Q Industrial drainage ×C Industrial drainage ，M Drainage pollutant for livestock and poultry cultivation = Q Livestock and poultry breeding drainage ×C Livestock and poultry breeding drainage ；
Wherein, the liquid crystal display device comprises a liquid crystal display device,
C industrial drainage The method is to calculate the average concentration of the pollutants of industrial wastewater in the water receiving range of the sewage treatment plant in the period;
C livestock and poultry breeding drainage The method is used for calculating the average pollutant concentration of sewage of a large-scale livestock and poultry farm collected by a sewage treatment plant in a period;
C checking concentration Checking the concentration of domestic sewage;
M industrial drainage pollutants The amount of industrial wastewater contaminants collected for a sewage treatment plant;
M drainage pollutant for livestock and poultry cultivation The amount of the wastewater pollutants in the livestock and poultry cultivation collected by the sewage treatment plant;
the pipe network collection efficiency and sewage plant operation efficiency calculation module comprises: the pipe network collection efficiency alpha and the sewage plant operation efficiency beta are calculated according to the following calculation formula:
α=(Q life collection +Q Industrial drainage +Q Livestock and poultry breeding drainage )/Q Inlet water of sewage plant ；
β=(Q Life collection +Q Industrial drainage +Q Livestock and poultry breeding drainage )/Q Treatment scale of sewage plant ；
Wherein Q is Treatment scale of sewage plant Is the build-up scale of the sewage treatment plant, and refers to the daily rated water inflow of the sewage treatment plant multiplied by the calculation period to represent the treatment capacity of the sewage treatment plant.
Preferably, the contaminants include chemical oxygen demand COD, BOD 5 Any one or more of total phosphorus, ammonia nitrogen and total nitrogen.
Preferably, the pollutant is COD, the threshold value of the low pollutant concentration is 260 mg/L, and the threshold value of the ideal pollutant concentration is 350mg/L, C Checking concentration The value of (C) is 350mg/L.
Preferably, the Q Industrial drainage The calculation formula is as follows:
Q industrial drainage =Q Industrial water ×K1 Coefficient of industrial sewage discharge ，
Wherein Q is Industrial water Refers to calculating the total amount of industrial water in the water receiving range of the sewage treatment plant in the period,
K1 coefficient of industrial sewage discharge Refers to the industrial sewage discharge coefficient, is obtained by using the existing calculation method according to the historical data,
the Q is Domestic sewage generation The calculation formula is as follows:
Q domestic sewage generation =Q Domestic water ×K2 The production coefficient of domestic sewage is calculated,
wherein Q is Domestic water Refers to calculating the total amount of resident comprehensive domestic water in the water collecting range of the sewage treatment plant in the period,
K2 coefficient of domestic sewage generation Is a domestic sewage generation coefficient, and the value range is 0.8-0.9.
Preferably, the method further comprises the following modules:
the information prompt module: according to the values of alpha and beta, sending maintenance information for a pipe network and a sewage treatment plant, wherein the specific mode is as follows:
when alpha is more than or equal to 80 percent, the information that the pipe network needs routine maintenance is prompted,
when the alpha is more than 60 percent and less than 80 percent, the information that the pipe network needs to carry out the planned maintenance is prompted,
when alpha is less than or equal to 60 percent, the information that the pipe network needs comprehensive maintenance is prompted,
when beta is more than 80 percent, the information that the sewage treatment plant needs to be expanded is indicated,
when beta is more than or equal to 60 percent and less than or equal to 80 percent, prompting the information that the scale of the sewage treatment plant meets the requirement,
when beta is less than 60%, prompting the sewage treatment plant to enlarge the water receiving range and improve the water receiving amount.
Compared with the prior art, the application has the following beneficial effects:
(1) Comprehensively and objectively analyzing and evaluating the emission of the existing pollution sources and the collection and treatment efficiency of a pipe network and a sewage treatment plant: at present, the capability and efficiency of continuously improving the sewage collection and treatment are still important measures for improving the quality of the water environment, but the improvement means are no longer large-scale pipe network laying and new sewage treatment plants, but the emission of the existing pollution sources and the collection and treatment efficiency of the pipe network and the sewage treatment plants are required to be comprehensively evaluated, and problems and short plates are timely found.
(2) Objectively evaluating the conditions of 'pseudo saturation' of the running load of a sewage treatment plant and 'virtual high' of the pollutant collecting and treating capacity caused by infiltration of external water: when the efficiency evaluation is carried out on the existing pipe network and the sewage treatment plant, the conditions of false saturation of the running load of the sewage treatment plant and false high of the pollutant collecting and treating capacity caused by the infiltration of external water are commonly existed. The result of the evaluation is likely to be quite different from the actual case if the influence of contaminants introduced from the external water is not excluded. For example, the sewage treatment plant is considered to be urgently expanded and newly built only according to the fact that the inflow amount of the sewage treatment plant is similar to the existing treatment scale, but in fact, because a large amount of invasion of external water occupies the capacity and space of sewage treatment, the amount of sewage to be treated in the area does not exceed the capacity of the sewage treatment plant, and the blind expansion causes a large waste of manpower and material resources. As another example, the amount of contaminants collected by a sewage plant approaches or even exceeds the regional contaminant production, and the collection efficiency of the pipe network is considered to be high, but in fact, because contaminants introduced by external water cause "virtual high" of this capability, the insufficient collection of sewage and short plates can be found only by subtracting the contaminants introduced by external water.
(3) Establishing a calculation method and a calculation device for efficiency of a sewage treatment plant and a pipe network considering external water: the application corrects the actual collection capacity of the sewage treatment plant and objectively reflects the actual collection treatment efficiency of the sewage treatment plant and the pipe network thereof. Through analysis pipe network collection efficiency and sewage plant operating efficiency, be convenient for reach sewage treatment base number, discover sewage collection treatment short slab, rationally arrange engineering measure, high-efficient promotion sewage collection treatment efficiency, continuously promote water environment quality, have good environmental benefit and economic benefits.
Drawings
In order to more clearly illustrate the technical method of the present application, the drawings required to be used in the embodiments will be briefly described, and it will be apparent to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a flowchart illustrating steps of a computing method according to an embodiment of the present application.
Description of the embodiments
The application will now be described in detail with reference to the drawings and examples.
The pollutants in the method are COD and BOD 5 Any one of total phosphorus, ammonia nitrogen and total nitrogen is used as a calculation index, or a plurality of pollutants are used as comprehensive calculation indexes.
In the method, data are collected for calculation in the same time period, namely, the calculation period can be half a year or one year or longer.
In the calculation process of the method, according to different units of each calculation amount in the formula, different coefficients can be multiplied before the formula so as to keep the metering balance of the left and right of the formula. For example, when the unit of water quantityThe concentration of the pollutant is mg/L (milligrams per liter) and the concentration of the pollutant is multiplied by 10 when the concentration is m < m >/a (cubic meter per year) -6 The total amount of contaminants t/a (ton/year) is obtained. It is suggested to maintain the consistency of the same class of index measurement units during the calculation process, thereby reducing errors.
Example 1
In this example, the contaminant is chemical oxygen demand, COD, and the calculation period is one year.
S1: collecting relevant data: q (Q) Treatment scale of sewage plant 、Q Inlet water of sewage plant 、C Inlet water of sewage plant 、Q Livestock and poultry breeding drainage 、C Livestock and poultry breeding drainage 、Q Domestic water 、Q Industrial water 。
Wherein, the liquid crystal display device comprises a liquid crystal display device,
Q treatment scale of sewage plant The scale of the sewage treatment plant is the rated daily water inflow of the sewage treatment plant multiplied by the calculation period to represent the treatment capacity of the sewage treatment plant;
Q inlet water of sewage plant The actual total inflow of the sewage treatment plant in the period is calculated;
C inlet water of sewage plant Refers to calculating the average concentration of pollutants in water entering a sewage treatment plant in a period;
Q livestock and poultry breeding drainage The method is used for calculating the total amount of sewage of a large-scale livestock and poultry farm collected by a sewage treatment plant in a period;
C livestock and poultry breeding drainage The method is used for calculating the average pollutant concentration of sewage of a large-scale livestock and poultry farm collected by a sewage treatment plant in a period;
Q domestic water The method is used for calculating the total amount of resident comprehensive domestic water in the water collecting range of the sewage treatment plant in a period;
Q industrial water Refers to calculating the total industrial water amount in the water receiving range of the sewage treatment plant in the period.
Specifically, Q Inlet water of sewage plant And C Inlet water of sewage plant The data of the water inlet can be used as daily average value through the average value of the water inlet on-line monitoring instrument, and if the water inlet has no pollutant concentration on-line monitoring equipment, daily manual monitoring data is adoptedThe average value is used as the daily average value of the concentration of the pollutant in water inlet on the same day, such as water inlet water-free on-line monitoring equipment, and water quantity data of a water outlet can be referred; during sampling or detection, interference of factors such as internal reflux, repeated metering and the like of a sewage treatment plant is avoided;
Q livestock and poultry breeding drainage And C Livestock and poultry breeding drainage Only the drainage data related to livestock and poultry farms where sewage is discharged into the sewage treatment plant can be counted according to the classification of typical farms such as large livestock, small livestock and poultry. Drainage such as irrigation and aquaculture does not enter the sewage treatment plant and is not included in the statistical range. The daily drainage water quantity and the pollutant concentration can be used as a daily average value by reading the average value of data through a water outlet on-line monitoring instrument; if no drainage pollutant concentration on-line monitoring equipment exists, adopting the average value of daily manual monitoring data as the daily average value of the drainage pollutant concentration on the same day. The livestock and poultry raising drainer without fixed metering facilities can adopt mobile metering equipment to measure at a drain outlet, calculate historical data of an environmental statistics department or estimate the total discharge amount of sewage pollutants according to environmental impact evaluation of a project to obtain wholesale.
Q Domestic water Not only the daily living water for drinking, cooking, washing and the like of residents, but also the water consumption of public facilities such as hospitals, schools, office buildings of institutions, commercial complexes and the like, and the water supply sources include water works, water supply from a self-provided water source and the like.
Q Industrial water The method comprises the steps of industrial public water supply quantity in the water receiving range of the sewage treatment plant, water user quantity for self-provided water source and steam purchase quantity outside the water receiving range.
S2: calculating the theoretical infiltration rateR Theoretical infiltration rate The calculation formula is as follows:
;
wherein Q is Industrial drainage =Q Industrial water ×K1 Coefficient of industrial sewage discharge ，
Q Industrial drainage Refers to an industrial enterprise for calculating the water receiving range of a sewage treatment plant in a periodTotal amount of industrial sewage discharged.
Coefficient of industrial sewage discharge K1 Coefficient of industrial sewage discharge Reflecting Q Industrial drainage 、Q Industrial water The ratio relation between the two is obtained by using the existing calculation method according to historical data; the source of the historical data can be environmental statistics data, pollution source census data and the like in recent years; the estimation method may be a regression model, a moving average method, or the like.
Wherein Q is Domestic sewage generation =Q Domestic water ×K2 Coefficient of domestic sewage generation ，
Wherein Q is Domestic sewage generation Refers to the calculation of the total amount of domestic sewage generated in the water receiving range of a sewage treatment plant in a period.
K2 Coefficient of domestic sewage generation Is the domestic sewage generation coefficient reflecting Q Domestic sewage generation 、Q Domestic water The ratio relation between the two is 0.8-0.9.
S3: calculating pollutant quantity M of super-receiving external water of sewage treatment plant Super-receiving pollutant from external water The method comprises the steps of carrying out a first treatment on the surface of the The specific calculation method comprises the following steps:
when (when)R Theoretical infiltration rate When less than or equal to 10%, M Super-receiving pollutant from external water =0；
Wherein whenR Theoretical infiltration rate Greater than 10% >:
a) When C Inlet water of sewage plant When < low contaminant concentration threshold:
one preferred method for the low pollutant concentration threshold is to take the value of the minimum pollutant inlet water concentration requirement limit in the operation process of the sewage treatment plant according to the related drainage management department. The low contaminant concentration threshold in this embodiment takes a value of 260 mg/L,
b) When the low pollutant concentration threshold value is less than or equal to C Inlet water of sewage plant When the concentration of the pollutant is less than the ideal concentration threshold,
；
one preferred way to value the ideal contaminant concentration threshold is based on the typical contaminant feed water concentration in the associated drain management specification. In this example, the value is 350mg/L.
c) When C Inlet water of sewage plant When the concentration threshold value of the ideal pollutant is not less than,
M super-receiving pollutant from external water =0；
S4: calculating the effective collection amount M of pollutants of a sewage treatment plant Effective collection of pollutants in sewage plants The calculation formula is as follows:
M effective collection of pollutants in sewage plants =M Collecting pollutants in sewage plants -M Super-receiving pollutant from external water ；
Wherein M is Collecting pollutants in sewage plants The calculation formula for the pollutant amount collected by the sewage treatment plant is as follows:
M collecting pollutants in sewage plants = Q Inlet water of sewage plant ×C Inlet water of sewage plant ；
S5: calculating the total collection amount Q of domestic sewage of the sewage plant in the calculation period Life collection The calculation formula is as follows:
；
wherein M is Industrial drainage pollutants Industrial drainage contaminants collected for sewage treatment plants; m is M Drainage pollutant for livestock and poultry cultivation Drain pollutants for livestock and poultry cultivation collected by a sewage treatment plant;
wherein M is Industrial drainage pollutants = Q Industrial drainage ×C Industrial drainage ，C Industrial drainage The method is characterized in that the average concentration of the pollutants of industrial drainage in the water receiving range of the sewage treatment plant in the period is calculated, and the pollutant average concentration can be obtained by combining the environmental statistics data and the pollution source census data in recent years in the area with the data such as enterprise self-monitoring, supervision monitoring and the like;
wherein M is Drainage pollutant for livestock and poultry cultivation = Q Livestock and poultry breeding drainage ×C Livestock and poultry breeding drainage ；
Wherein C is Checking concentration For checking the concentration of domestic sewage, a common value-taking mode is obtained according to the related technical specifications such as national water supply and drainage design standard or sampling monitoring, in this embodiment C Checking concentration 350mg/L;
s6: the pipe network collection efficiency alpha and the sewage plant operation efficiency beta are calculated according to the following calculation formula:
α=(Q life collection +Q Industrial drainage +Q Livestock and poultry breeding drainage )/Q Inlet water of sewage plant ；
β=(Q Life collection +Q Industrial drainage +Q Livestock and poultry breeding drainage )/Q Treatment scale of sewage plant ；
And analyzing the actual collection treatment efficiency of the sewage treatment plant according to the pipe network collection efficiency alpha and the sewage plant operation efficiency beta.
The pipe network collection efficiency alpha represents the ratio of the effective water quantity collected by the sewage plant to the total water inflow after the influence of external water is removed, and represents the collection efficiency of the sewage pipe network system in the area. When alpha is more than or equal to 80%, the operation condition of the regional pipe network is good, the collection efficiency is high, the infiltration amount of external water is small, the sewage entering the sewage treatment plant is basically domestic sewage, industrial wastewater and large-scale livestock and poultry cultivation drainage which are required to be completely collected, and the conventional detection and maintenance are only required to be carried out on the existing pipe network; when the alpha is more than 60 percent and less than 80 percent, the general operation condition of the pipe network in the area is indicated, the collection efficiency is to be improved, and partial external water infiltrates into the pipe network system to occupy the capacity of sewage collection, so that the existing pipe network needs to be subjected to planned investigation, detection and repair; when alpha is less than or equal to 60%, the operation condition of the pipe network in the area is poor, the collection efficiency is urgently required to be improved, a large amount of external water infiltrates into the pipe network system, the capacity of sewage collection is occupied, the existing pipe network is required to be comprehensively examined, detected and repaired, and the problem of external water inflow infiltration is preferentially solved.
Beta represents the ratio of the effective water amount collected by the sewage plant to the existing treatment scale of the sewage plant after the influence of external water is removed, and the index can reflect the treatment efficiency and the effective operation load of the sewage plant. When beta is more than 80 percent and even approaches to 100 percent, the treatment capacity of the sewage treatment plant is about to be saturated, and the planned extension or new construction of the sewage treatment plant is required; when beta is more than or equal to 60% and less than or equal to 80%, the treatment capacity of the sewage plant is indicated to treat the collected sewage; when beta is less than 60%, the existing scale of the sewage treatment plant is too large, and the expansion of the water collecting range of the sewage treatment plant or the perfection of the arrangement of main pipes and branch pipes in the water collecting range can be considered, so that the waste water can be completely collected.
Example 2:
taking a sewage treatment plant in A city 1 as an example, taking Chemical Oxygen Demand (COD) as a pollutant calculation object, and taking one-year period as a calculation period, calculating the pipe network collection efficiency alpha and the sewage plant operation efficiency beta.
The build-up scale of the sewage treatment plant is 7.5 ten thousand tons/day, thus the Q is known Treatment scale of sewage plant ；
In the calculation period, the total annual inflow water amount Q of the sewage treatment plant Inlet water of sewage plant 2922 ten thousand tons, and the daily average water inflow is 8.01 ten thousand tons;
c in the calculation cycle Inlet water of sewage plant 248.91mg/L, the sewage treatment plant is located in a town area, and sewage of a large-scale livestock and poultry farm is not collected. Q (Q) Domestic water 2759 ten thousand tons, Q Industrial water 8.455 ten thousand tons.
Environmental statistics and pollution census data display in recent years in the area, and industrial sewage emission coefficient K1 in the area Coefficient of industrial sewage discharge At 0.72, the ratio K2 of the domestic sewage yield to the domestic water consumption in this example Coefficient of domestic sewage generation Taken to be 0.85, the zone calculates the average concentration C of contaminants of the industrial effluent over the period Industrial drainage At 140.20mg/L, the checking concentration C of domestic sewage in the period is calculated in this example Checking concentration 350mg/L was taken.
According to the calculation formula of the step 2, Q can be obtained Industrial drainage 6.088 ten thousand tons, Q Domestic sewage generation Is 2345 ten thousand tons of the weight of the product,R theoretical infiltration rate 19.5%;
according to the calculation formula of the step 3, M can be obtained Super-receiving pollutant from external water 691 tons; according to step 4Formula, can obtain M Collecting pollutants in sewage plants Effective collection amount M of pollutants of a sewage treatment plant of 7273 tons Effective collection of pollutants in sewage plants 6582 tons;
according to the calculation formula of the step 5, M can be obtained Industrial drainage pollutants 8.54 tons, M Drainage pollutant for livestock and poultry cultivation The livestock is 0 ton, and the domestic sewage quantity Q collected by a sewage plant Life collection 1878 ten thousand tons;
according to the calculation formula of the step 6, the pipe network collection efficiency alpha is 64.5%, and the sewage plant operation efficiency beta is 68.8%.
If the method is not used for calculation and analysis, the daily average water inflow of the sewage treatment plant is 8.01 ten thousand tons which exceeds the treatment scale of 7.5 ten thousand tons per day, and the method belongs to overload operation, and the extension or new construction of the sewage treatment plant should be immediately carried out.
However, according to the analysis of the calculation result of the method, the operation efficiency beta of the sewage plant is 68.8%, namely, the sewage treatment plant only uses 68.8% of the treatment capacity to treat the collected domestic sewage and industrial wastewater, and part of the treatment capacity of the sewage plant is occupied by external water, so that the blind expansion of the treatment scale is not suitable.
In addition, the pipe network collection efficiency alpha of the sewage treatment plant is 64.5%, namely, only 64.5% of the sewage collected by the corresponding pipe network in the water collection range of the sewage treatment plant is the sewage which is required to be completely collected.
As described above, the sewage plant collects only a small amount of industrial wastewater, and thus the industrial wastewater is not a major factor affecting the collection rate of domestic sewage. It can be determined that the main cause of the high operating load and the low effective load of the sewage plant is that a certain amount of external water is excessively received to occupy the water receiving capacity of the sewage plant.
Theoretically, the sewage plant is designed to be of sufficient size to collect and treat the sewage produced in the area. Most of domestic sewage and industrial wastewater generated in the area are also collected and treated, but the excessive recovery of external water increases the operation load of the sewage plant, and pressure is caused to the stable operation of the sewage plant and the pollutant treatment efficiency. Therefore, the blind expansion of the treatment scale of the sewage plant is not the key for solving the problems, but the 'squeezed water' is taken as a priority strategy, the investigation of the direct discharge, interception, overflow and backflow conditions of a water outlet are carried out in all directions, the investigation of the mixed connection conditions of sewage and rainwater and a pipeline network, the maintenance of the pipeline operation and the defect correction of an inspection well are carried out, the measures such as the repair and the reconstruction of the pipeline network, the reconstruction of the mixed connection in a wrong way, the reconstruction of a interception facility and the improvement of the pump station capacity are focused, the investigation is carried out immediately, and the problem of inflow and infiltration of the external water is preferentially solved.
Aiming at the conditions of 'pseudo saturation' of the running load of the sewage treatment plant and 'virtual high' of the pollutant collecting and treating capacity caused by the infiltration of the external water existing generally at present, the application corrects the actual collecting capacity of the sewage treatment plant, objectively reflects the actual collecting and treating efficiency of the sewage treatment plant and a pipe network thereof, and provides effective support for finding out a problem short plate, accurately applying and effectively improving the sewage collecting capacity and the pollutant treating level. And the method is repeatedly carried out in different areas and sewage treatment plants for a plurality of times to obtain reliable results, and the method is not repeated here.
According to the embodiment listed above, the application provides a method and a device for calculating the efficiency of a sewage treatment plant and a pipe network taking contaminants into account by external water, wherein in the same time period, the relevant data are collected in the water collecting range of the sewage treatment plant, the water consumption of local living, industry and cultivation industries, the pollution discharge coefficient produced by each industry and the concentration of the contaminants in sewage are known, the water discharge and the contaminant discharge of the whole area are calculated, the water quantity and the contaminant quantity of the sewage collected by the sewage treatment plant are compared, the theoretical infiltration rate of the area is analyzed, the effective contaminant quantity and the effective sewage quantity collected by the sewage treatment plant are calculated, so that the pipe network collecting efficiency and the operation efficiency of the sewage treatment plant in the area after the influence of the external water is removed are obtained, the actual collecting treatment efficiency of the sewage treatment plant is analyzed, the clean bottom is found, the short plates are reasonably arranged, engineering measures are reasonably arranged, the sewage collecting treatment efficiency is effectively improved, and the water environment quality is continuously improved.
It will be apparent to those skilled in the art that the techniques of the embodiments of this patent may be implemented in software plus the necessary general hardware platform. Based on such understanding, the technical solutions in the embodiments of the present patent may be embodied in essence or what contributes to the prior art in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments of the present patent.
The same or similar parts between the various embodiments in this specification are referred to each other. In particular, for the device embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, as far as reference is made to the description in the method embodiments.
The application has been described in detail in connection with the specific embodiments and exemplary examples thereof, but such description is not to be construed as limiting the application. It will be understood by those skilled in the art that various equivalent substitutions, modifications or improvements may be made to the technical solution of the present application and its embodiments without departing from the spirit and scope of the present application, and these fall within the scope of the present application. The scope of the application is defined by the appended claims.
Claims (10)
1. A sewage treatment plant and pipe network efficiency calculation method taking into account external water, characterized in that the following steps are performed for the data of pollutants in a calculation period:
s1: calculating the theoretical infiltration rateR Theoretical infiltration rate The calculation formula is as follows:
the method comprises the steps of carrying out a first treatment on the surface of the Wherein, the liquid crystal display device comprises a liquid crystal display device,
Q inlet water of sewage plant The actual total inflow of the sewage treatment plant in the period is calculated;
Q industrial drainage The method is used for calculating the total sewage discharge amount of industrial enterprises in the water receiving range of the sewage treatment plant in the period;
Q domestic sewage generation Refers to calculating the total amount of domestic sewage generated in the water receiving range of a sewage treatment plant in a period；
Q Livestock and poultry breeding drainage The method is used for calculating the total amount of sewage of a large-scale livestock and poultry farm collected by a sewage treatment plant in a period;
s2: calculating pollutant quantity M of super-receiving external water of sewage treatment plant Super-receiving pollutant from external water The method comprises the steps of carrying out a first treatment on the surface of the The calculation formula is as follows:
when (when)R Theoretical infiltration rate When less than or equal to 10%, M Super-receiving pollutant from external water =0；
When (when)R Theoretical infiltration rate Greater than 10% >:
when C Inlet water of sewage plant When < low contaminant concentration threshold:
；
when the low pollutant concentration threshold value is less than or equal to C Inlet water of sewage plant When < ideal contaminant concentration threshold:
；
when C Inlet water of sewage plant When the concentration threshold value of ideal pollutant is not less than:
M super-receiving pollutant from external water =0；
Wherein C is Inlet water of sewage plant Refers to calculating the average concentration of pollutants in water entering a sewage treatment plant in a period;
s3: calculating the effective collection amount M of pollutants of a sewage treatment plant Effective collection of pollutants in sewage plants The calculation formula is as follows:
M effective collection of pollutants in sewage plants =M Collecting pollutants in sewage plants -M Super-receiving pollutant from external water ；
Wherein M is Collecting pollutants in sewage plants The calculation formula for the pollutant amount collected by the sewage treatment plant is as follows:
M collecting pollutants in sewage plants = Q Inlet water of sewage plant ×C Inlet water of sewage plant ；
S4: calculating the sewage plant life in the calculation periodTotal amount of collected living sewage Q Life collection The calculation formula is as follows:
；
wherein M is Industrial drainage pollutants = Q Industrial drainage ×C Industrial drainage ，M Drainage pollutant for livestock and poultry cultivation = Q Livestock and poultry breeding drainage ×C Livestock and poultry breeding drainage ；
Wherein, the liquid crystal display device comprises a liquid crystal display device,
C industrial drainage The method is to calculate the average concentration of the pollutants of industrial wastewater in the water receiving range of the sewage treatment plant in the period;
C livestock and poultry breeding drainage The method is used for calculating the average pollutant concentration of sewage of a large-scale livestock and poultry farm collected by a sewage treatment plant in a period;
C checking concentration Checking the concentration of domestic sewage;
M industrial drainage pollutants The amount of industrial wastewater contaminants collected for a sewage treatment plant;
M drainage pollutant for livestock and poultry cultivation The amount of the wastewater pollutants in the livestock and poultry cultivation collected by the sewage treatment plant;
s5: the pipe network collection efficiency alpha and the sewage plant operation efficiency beta are calculated according to the following calculation formula:
α=(Q life collection +Q Industrial drainage +Q Livestock and poultry breeding drainage )/Q Inlet water of sewage plant ；
β=(Q Life collection +Q Industrial drainage +Q Livestock and poultry breeding drainage )/Q Treatment scale of sewage plant ；
Wherein Q is Treatment scale of sewage plant Is the build-up scale of the sewage treatment plant, and refers to the daily rated water inflow of the sewage treatment plant multiplied by the calculation period to represent the treatment capacity of the sewage treatment plant.
2. The method for calculating the efficiency of a sewage treatment plant and a pipe network taking into consideration external water according to claim 1, wherein said pollutants include Chemical Oxygen Demand (COD) and BOD 5 Any one or more of total phosphorus, ammonia nitrogen and total nitrogen.
3. The method for calculating the efficiency of a sewage treatment plant and a pipe network taking into account external water according to claim 1, wherein the pollutant is COD, the threshold value of the low pollutant concentration is 260 mg/L, and the threshold value of the ideal pollutant concentration is 350mg/L, C Checking concentration The value of (C) is 350mg/L.
4. The method for calculating the efficiency of a sewage treatment plant and a pipe network taking into account external water according to claim 1, wherein the method comprises the following steps of
The Q is Industrial drainage The calculation formula is as follows:
Q industrial drainage =Q Industrial water ×K1 Coefficient of industrial sewage discharge ，
Wherein Q is Industrial water Refers to calculating the total amount of industrial water in the water receiving range of the sewage treatment plant in the period,
K1 coefficient of industrial sewage discharge Refers to an industrial sewage discharge coefficient, is obtained according to historical data by using the existing calculation method, wherein the calculation method comprises a regression model or a moving average method,
the Q is Domestic sewage generation The calculation formula is as follows:
Q domestic sewage generation =Q Domestic water ×K2 The production coefficient of domestic sewage is calculated,
wherein Q is Domestic water Refers to calculating the total amount of resident comprehensive domestic water in the water collecting range of the sewage treatment plant in the period,
K2 coefficient of domestic sewage generation Is a domestic sewage generation coefficient, and the value range is 0.8-0.9.
5. The method for calculating the efficiency of a sewage treatment plant and a pipe network taking into account external water according to claim 1, further comprising the steps of:
s6: according to the values of alpha and beta, sending maintenance information for a pipe network and a sewage treatment plant, wherein the specific mode is as follows:
when alpha is more than or equal to 80 percent, the information that the pipe network needs routine maintenance is prompted,
when the alpha is more than 60 percent and less than 80 percent, the information that the pipe network needs to carry out the planned maintenance is prompted,
when alpha is less than or equal to 60 percent, the information that the pipe network needs comprehensive maintenance is prompted,
when beta is more than 80 percent, the information that the sewage treatment plant needs to be expanded is indicated,
when beta is more than or equal to 60 percent and less than or equal to 80 percent, prompting the information that the scale of the sewage treatment plant meets the requirement,
when beta is less than 60%, prompting the sewage treatment plant to enlarge the water receiving range and improve the water receiving amount.
6. A sewage treatment plant and pipe network efficiency calculation device taking into account external water, characterized in that the data for the pollutants in the calculation cycle comprise the following modules:
theoretical infiltration rate calculation module: calculating the theoretical infiltration rateR Theoretical infiltration rate The calculation formula is as follows:
；
wherein, the liquid crystal display device comprises a liquid crystal display device,
Q inlet water of sewage plant The actual total inflow of the sewage treatment plant in the period is calculated;
Q industrial drainage The method is used for calculating the total sewage discharge amount of industrial enterprises in the water receiving range of the sewage treatment plant in the period;
Q domestic sewage generation The method is to calculate the total amount of domestic sewage generated in the water receiving range of the sewage treatment plant in a period;
Q livestock and poultry breeding drainage The method is used for calculating the total amount of sewage of a large-scale livestock and poultry farm collected by a sewage treatment plant in a period;
and a pollutant amount calculating module for receiving the external water excessively: calculating pollutant quantity M of super-receiving external water of sewage treatment plant Super-receiving pollutant from external water The method comprises the steps of carrying out a first treatment on the surface of the The calculation formula is as follows:
when (when)R Theoretical infiltration rate When less than or equal to 10%, M Super-receiving pollutant from external water =0；
When (when)R Theoretical infiltration rate Greater than 10% >:
when C Inlet water of sewage plant When < low contaminant concentration threshold:
;
when the low pollutant concentration threshold value is less than or equal to C Inlet water of sewage plant When < ideal contaminant concentration threshold:
;
when C Inlet water of sewage plant When the concentration threshold value of ideal pollutant is not less than:
M super-receiving pollutant from external water =0；
Wherein C is Inlet water of sewage plant Refers to calculating the average concentration of pollutants in water entering a sewage treatment plant in a period;
and a pollutant effective collection amount calculation module: calculating the effective collection amount M of pollutants of a sewage treatment plant Effective collection of pollutants in sewage plants The calculation formula is as follows:
M effective collection of pollutants in sewage plants =M Collecting pollutants in sewage plants -M Super-receiving pollutant from external water ；
Wherein M is Collecting pollutants in sewage plants The calculation formula for the pollutant amount collected by the sewage treatment plant is as follows:
M collecting pollutants in sewage plants = Q Inlet water of sewage plant ×C Inlet water of sewage plant ；
The domestic sewage collection total amount calculation module: calculating the total collection amount Q of domestic sewage of the sewage plant in the calculation period Life collection The calculation formula is as follows:
;
wherein M is Industrial drainage pollutants = Q Industrial drainage ×C Industrial drainage ，M Drainage pollutant for livestock and poultry cultivation = Q Livestock and poultry breeding drainage ×C Livestock and poultry breeding drainage ；
Wherein, the liquid crystal display device comprises a liquid crystal display device,
C industrial drainage The method is to calculate the average concentration of the pollutants of industrial wastewater in the water receiving range of the sewage treatment plant in the period;
C livestock and poultry breeding drainage The method is used for calculating the average pollutant concentration of sewage of a large-scale livestock and poultry farm collected by a sewage treatment plant in a period;
C checking concentration Checking the concentration of domestic sewage;
M industrial drainage pollutants The amount of industrial wastewater contaminants collected for a sewage treatment plant;
M drainage pollutant for livestock and poultry cultivation The amount of the wastewater pollutants in the livestock and poultry cultivation collected by the sewage treatment plant;
the pipe network collection efficiency and sewage plant operation efficiency calculation module comprises: the pipe network collection efficiency alpha and the sewage plant operation efficiency beta are calculated according to the following calculation formula:
α=(Q life collection +Q Industrial drainage +Q Livestock and poultry breeding drainage )/Q Inlet water of sewage plant ；
β=(Q Life collection +Q Industrial drainage +Q Livestock and poultry breeding drainage )/Q Treatment scale of sewage plant ；
Wherein Q is Treatment scale of sewage plant Is the build-up scale of the sewage treatment plant, and refers to the daily rated water inflow of the sewage treatment plant multiplied by the calculation period to represent the treatment capacity of the sewage treatment plant.
7. The sewage treatment plant and pipe network efficiency calculation apparatus taking into consideration external water according to claim 6, wherein said pollutants include chemical oxygen demand COD, BOD 5 Any one or more of total phosphorus, ammonia nitrogen and total nitrogen.
8. An out of consideration according to claim 6The sewage treatment plant and pipe network efficiency calculation device for water is characterized in that the pollutant is Chemical Oxygen Demand (COD), the value of the low pollutant concentration threshold is 260 mg/L, and the value of the ideal pollutant concentration threshold is 350mg/L, C Checking concentration The value of (C) is 350mg/L.
9. The sewage treatment plant and pipe network efficiency calculation apparatus taking into consideration external water according to claim 6, wherein said Q Industrial drainage The calculation formula is as follows:
Q industrial drainage =Q Industrial water ×K1 The discharge coefficient of industrial sewage,
wherein Q is Industrial water Refers to calculating the total amount of industrial water in the water receiving range of the sewage treatment plant in the period,
K1 coefficient of industrial sewage discharge Refers to an industrial sewage discharge coefficient, is obtained according to historical data by using the existing calculation method, wherein the calculation method comprises a regression model or a moving average method,
the Q is Domestic sewage generation The calculation formula is as follows:
Q domestic sewage generation =Q Domestic water ×K2 The production coefficient of domestic sewage is calculated,
wherein Q is Domestic water Refers to calculating the total amount of resident comprehensive domestic water in the water collecting range of the sewage treatment plant in the period,
K2 coefficient of domestic sewage generation Is a domestic sewage generation coefficient, and the value range is 0.8-0.9.
10. The sewage treatment plant and pipe network efficiency calculation device taking into account external water according to claim 6, further comprising the following modules:
the information prompt module: according to the values of alpha and beta, sending maintenance information for a pipe network and a sewage treatment plant, wherein the specific mode is as follows:
when alpha is more than or equal to 80 percent, the information that the pipe network needs routine maintenance is prompted,
when the alpha is more than 60 percent and less than 80 percent, the information that the pipe network needs to carry out the planned maintenance is prompted,
when alpha is less than or equal to 60 percent, the information that the pipe network needs comprehensive maintenance is prompted,
when beta is more than 80 percent, the information that the sewage treatment plant needs to be expanded is indicated,
when beta is more than or equal to 60 percent and less than or equal to 80 percent, prompting the information that the scale of the sewage treatment plant meets the requirement,
when beta is less than 60%, prompting the sewage treatment plant to enlarge the water receiving range and improve the water receiving amount.
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| CN114862640A (en) * | 2022-03-28 | 2022-08-05 | 江苏省环境科学研究院 | Urban area domestic sewage collection rate calculation method |
| CN115186960A (en) * | 2022-05-16 | 2022-10-14 | 江苏省环境工程技术有限公司 | Accounting method and device for effective collection and treatment capacity of urban sewage |
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| CN114862640A (en) * | 2022-03-28 | 2022-08-05 | 江苏省环境科学研究院 | Urban area domestic sewage collection rate calculation method |
| CN115186960A (en) * | 2022-05-16 | 2022-10-14 | 江苏省环境工程技术有限公司 | Accounting method and device for effective collection and treatment capacity of urban sewage |
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