CN111581805B - Response analysis method for pollutant input and water quality of control unit - Google Patents
Response analysis method for pollutant input and water quality of control unit Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 124
- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 76
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 76
- 238000004458 analytical method Methods 0.000 title claims abstract description 27
- 230000004044 response Effects 0.000 title claims abstract description 17
- 230000009467 reduction Effects 0.000 claims abstract description 40
- 239000010865 sewage Substances 0.000 claims abstract description 24
- 230000000750 progressive effect Effects 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000004088 simulation Methods 0.000 claims abstract description 5
- 239000002352 surface water Substances 0.000 claims description 8
- 239000000356 contaminant Substances 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 2
- 101100365883 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) SLG1 gene Proteins 0.000 description 1
- 101100156779 Schizosaccharomyces pombe (strain 972 / ATCC 24843) wsc1 gene Proteins 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The invention discloses a control unit pollutant input and water quality response analysis method, which divides a river basin control unit; and performing simulation analysis on the relation between the pollutant input and the water quality response of the control unit through a water quality model, and according to the water quality target, simulating and calculating the water environment capacity of the control unit and the emission limit value of the point source pollutant. And controlling the total pollutant amount according to the current water quality simulation result. For a control unit reaching the standard of the water body, determining and executing the requirement of the current comprehensive sewage discharge standard on the discharge limit value by the discharge limit value of the pollution source; for a control unit which does not reach the standard of the water body, the prior economic and technical conditions are considered, the influence degree of pollutant emission reduction on the water environment quality is analyzed stepwise in a progressive layer-by-layer manner, the total pollutant amount is controlled, the optimal scheme for comprehensive treatment of point sources and surface sources is provided, the pollution load is reduced, the water quality is improved, and the target requirement of the water quality is met. Compared with the prior art, the method adopts a hierarchical progressive analysis method to analyze the influence degree of the change of each pollutant reduction amount on water quality, and optimizes the pollutant reduction scheme to achieve the water quality management target.
Description
Technical Field
The invention relates to the technical field of total water pollutant control, in particular to a response analysis method for controlling unit pollutant input and water quality.
Background
The water pollution control in China implements a target total control technology, namely, the amount of pollutants which can be discharged is determined according to the allowable limit which can be achieved in management. The target total amount control is based on the pollutant total amount control of the technology by taking administrative areas as a unit, so that the influence degree of regional pollutant emission on river water quality can not be well reflected, and the realization of a water quality target is not facilitated. Although the objective total amount management technique suppresses the trend of deterioration of the basin water quality to some extent, the water quality improvement effect is not obvious enough because the water quality refinement management based on the total amount of the control unit capacity is not realized.
Disclosure of Invention
Aiming at the defects existing in the prior art method, the invention provides a response analysis method for pollutant input and water quality of a control unit, which is based on the total water environment capacity control technology of the control unit, adopts a hierarchical progressive analysis method to analyze the influence degree of the change of the discharge amount of each pollutant on the water quality, and optimizes the pollutant discharge reduction scheme to realize the water quality management target.
In order to achieve the above purpose, the invention is implemented according to the following technical scheme:
an input response analysis method for controlling unit pollutants and water quality, comprising the following steps:
s1, dividing a drainage basin control unit;
s2, performing simulation analysis on the response relation between the pollutant input and the water quality of the control unit through a water quality model, and simulating and calculating the water environment capacity of the control unit according to the water quality target;
s3, analyzing pollutant discharge conditions of a pollution source of the standard water body control unit, performing pollutant discharge according to corresponding discharge standards, and formulating a pollutant discharge limit value;
s4, analyzing the response relation between pollutants discharged by the pollution sources and water quality of the control unit of the water body which does not reach the standard, analyzing the influence degree of pollutant emission reduction of four layers on the water environment quality according to the progressive sequence of layers, and determining the emission limit value.
S5, providing an optimal scheme for comprehensive treatment of point sources and non-point sources, reducing pollution load, improving water quality and meeting the target requirement of water quality.
Specifically, in the step S4, analyzing the influence degree of pollutant emission reduction of four layers on the quality of the water environment according to the progressive sequence of the layers specifically includes:
the first layer is to control the total pollutant emission amount of the direct-discharge enterprises with the emission not reaching the standard. According to the integrated wastewater discharge standard, an in-line enterprise with out-of-standard discharge in a control unit is designed to determine pollution load reduction according to standard value discharge, the influence degree of discharge amount after pollutant reduction on river water quality is analyzed, the section water quality result is checked, and if the water quality reaches the standard, the in-line enterprise discharges to execute the integrated wastewater discharge standard, and a pollutant discharge limit value is formulated; if the section water quality does not reach the standard, performing a second layer of analysis;
the second layer is used for controlling the total pollutant emission amount of the sewage treatment plant. For a sewage plant which does not reach the first-level A emission standard, the sewage treatment plant executes the first-level A emission standard, pollution load reduction is determined, the influence degree of the emission after pollutant reduction on river water quality is analyzed, the cross-section water quality result is checked, if the water quality reaches the standard, the sewage treatment plant executes the first-level A emission standard, and pollutant emission limit values are formulated; if the section water quality does not reach the standard, carrying out third layer analysis;
the third layer is to further control the inline source. All the direct drainage sources are discharged according to the quality standard of the surface water environment, pollution load reduction is calculated, the influence degree of pollutant discharge on river water quality is analyzed, the cross section water quality result is checked, if the water quality reaches the standard, the direct drainage sources execute the quality discharge standard of the surface water environment, and pollutant discharge limit values are formulated; if the section water quality does not reach the standard, performing a fourth layer of analysis;
the fourth layer is to control the total amount of the non-point source pollution load. And analyzing the influence degree of the non-point source pollution load on the water quality after the non-point source pollution load is reduced, determining the emission limit value of the non-point source pollution load, and finally realizing that the cross-section water quality reaches the standard.
Compared with the prior art, the method is based on the total water environment capacity control of the control unit, analyzes the pollutant receiving capacity of the water body, dynamically analyzes the influence degree of pollutant emission change on the water quality in a layered progressive manner according to the current pollutant emission state, the existing economic and technical conditions and the water quality target requirement, determines the emission limit value of pollutants, scientifically and reasonably determines the total pollution load reduction amount, and can better improve the water quality and meet the water quality target requirement.
Drawings
FIG. 1 is a flow chart of the present invention.
FIG. 2 is a graph showing the effect of enterprise pollutant emission reduction on water quality in application example 1 of the invention.
FIG. 3 is a graph showing the effect of pollutant emission reduction on water quality in a sewage plant according to application example 2 of the present invention.
FIG. 4 is a graph showing the effect of the reduction of the emission of the point source pollution load on the water quality in the application example 3 of the invention.
FIG. 5 is a graph showing the influence of non-point source pollution load emission reduction on water quality in application example 4 of the invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. The specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
As shown in fig. 1, a method for analyzing the response of the pollutant input and the water quality of the control unit according to the embodiment includes the following steps:
s1, dividing a drainage basin control unit;
s2, performing simulation analysis on the response relation between the pollutant input and the water quality of the control unit through a water quality model, and simulating and calculating the water environment capacity of the control unit according to the water quality target;
s3, analyzing pollutant discharge conditions of a pollution source of the standard water body control unit, performing pollutant discharge according to corresponding discharge standards, and formulating a pollutant discharge limit value;
s4, analyzing the response relation between pollutants discharged by a pollution source and water quality of a control unit of the water body which does not reach the standard, analyzing the influence degree of pollutant emission reduction of four layers on the water environment quality according to a progressive layer-by-layer sequence, and determining an emission limit value, wherein the method specifically comprises the following steps of:
the first layer is to control the total pollutant emission amount of the direct-discharge enterprises with the emission not reaching the standard. According to the integrated wastewater discharge standard, an in-line enterprise with out-of-standard discharge in a control unit is designed to determine pollution load reduction according to standard value discharge, the influence degree of discharge amount after pollutant reduction on river water quality is analyzed, the section water quality result is checked, and if the water quality reaches the standard, the in-line enterprise discharges to execute the integrated wastewater discharge standard, and a pollutant discharge limit value is formulated; if the section water quality does not reach the standard, performing a second layer of analysis;
the second layer is used for controlling the total pollutant emission amount of the sewage treatment plant. For a sewage plant which does not reach the first-level A emission standard, the sewage treatment plant executes the first-level A emission standard, pollution load reduction is determined, the influence degree of the emission after pollutant reduction on river water quality is analyzed, the cross-section water quality result is checked, if the water quality reaches the standard, the sewage treatment plant executes the first-level A emission standard, and pollutant emission limit values are formulated; if the section water quality does not reach the standard, carrying out third layer analysis;
the third layer is to further control the inline source. All the direct drainage sources are discharged according to the quality standard of the surface water environment, pollution load reduction is calculated, the influence degree of pollutant discharge on river water quality is analyzed, the cross section water quality result is checked, if the water quality reaches the standard, the direct drainage sources execute the quality discharge standard of the surface water environment, and pollutant discharge limit values are formulated; if the section water quality does not reach the standard, performing a fourth layer of analysis;
the fourth layer is to control the total amount of the non-point source pollution load. And analyzing the influence degree of the non-point source pollution load on the water quality after the non-point source pollution load is reduced, determining the emission limit value of the non-point source pollution load, and finally realizing that the cross-section water quality reaches the standard.
To further verify the usability of the present invention, verification is performed by the following specific application example.
S5, providing an optimal scheme for comprehensive treatment of point sources and non-point sources, reducing pollution load, improving water quality and meeting the target requirement of water quality.
Application example 1
Analysis of influence of enterprise pollutant emission reduction on water quality
As can be seen from Table 1 and FIG. 2, the discharge concentration of QY5 chemical oxygen demand exceeds the comprehensive sewage discharge standard, the pollutant COD is required to be reduced by 0.000333t/m, the section concentration after the reduction of the discharge is reduced by 0.00000064mg/L for 5 months, and the section concentration after the reduction of the discharge is reduced by 0.0000024mg/L for 6 months, and the section concentrations of COD are still higher than the IV water quality standard although the section concentrations of COD are designed according to the comprehensive sewage discharge standard.
TABLE 1 Point source COD emission status
Application example 2
Analysis of influence of pollutant emission reduction of sewage plant on water quality
And (5) reducing chemical oxygen demand. As can be seen from table 2 and fig. 3, the COD emission concentration of the three sewage treatment plants is lower than the first-level a standard, and the pollution load reduction of the sewage treatment plants is not considered in the process. River water quality variation is consistent with scheme one.
TABLE 2 Primary A Standard COD discharge from sewage plant
Application example 3
Analysis of influence of point source pollution load further reduced on water quality
As can be seen from table 3 and fig. 4, according to the quality standard of the surface water environment, the COD emission concentration of other sewage plants and enterprises except WSC1 exceeds the class iv water quality standard, and the COD load is reduced: WSC11 cuts 0.017025t/m, WSC10 cuts 1.059411t/m, and QY5 cuts 0.001087t/m. COD in the section after emission reduction for 5 months still exceeds the standard.
TABLE 3 Point source COD emissions according to class IV surface Water Standard
Application example 4
Analysis of influence of non-point source pollution load emission reduction on water quality
The application examples 1-3 are simulated and analyzed, but the cross section still has the exceeding phenomenon with different degrees, so that the reduction of the pollution load of the surface source is considered, the cross section of the river water quality reaches the standard, and the surface source is considered from a water collecting area, so that the main flow and the side flow in the control unit are taken as targets, and the emission reduction potential is analyzed.
As can be seen from Table 4 and FIG. 5, the COD is reduced, the emission of the dry stream chemical oxygen demand is reduced by 187.9t/m and 58.19t/m in 5 and 6 months, the emission of the tributary chemical oxygen demand is reduced by 166.63t/m and 51.6t/m in 5 and 6 months, and the cross section reaches the cross section water quality target.
TABLE 4 surface source COD emission reduction
The application example is a layered progressive standard-reaching scheme formulated for the COD index of the control unit by utilizing an input response relation analysis method of pollutants and water quality, and the main reason that the COD of the control unit exceeds the standard can be analyzed by performing four scene schemes in a layered progressive manner because the emission of the non-standard source pollutants is not standard. The application example can show that the method can present the input response degree of pollutants and water quality, present the dynamic management process and effect of the layered progressive scene scheme, and provide scientific and technological support for formulating the optimal pollutant emission reduction scheme.
The technical scheme of the invention is not limited to the specific embodiment, and all technical modifications made according to the technical scheme of the invention fall within the protection scope of the invention.
Claims (1)
1. A method for controlling a response analysis of a unit's contaminant input and water quality, comprising the steps of:
s1, dividing a drainage basin control unit;
s2, performing simulation analysis on the response relation between the pollutant input and the water quality of the control unit through a water quality model, and simulating and calculating the water environment capacity of the control unit according to the water quality target;
s3, analyzing pollutant discharge conditions of a pollution source of the standard water body control unit, performing pollutant discharge according to corresponding discharge standards, and formulating a pollutant discharge limit value;
s4, analyzing the response relation between pollutants discharged by a pollution source and water quality of a control unit of the water body which does not reach the standard, analyzing the influence degree of pollutant emission reduction of four layers on the water environment quality according to a progressive sequence, and determining an emission limit value;
in the step S4, analyzing the influence degree of pollutant emission reduction of four layers on the quality of the water environment according to the progressive sequence of the layers specifically includes:
the first layer is to discharge total amount control of pollutant in the direct-discharge enterprises which discharge is not up to standard: according to the comprehensive sewage discharge standard, a direct-discharge enterprise with out-of-standard discharge in a control unit is designed to determine pollution load reduction according to standard value discharge, the influence degree of the discharge amount after pollutant reduction on river water quality is analyzed, the cross-section water quality result is checked, and if the water quality reaches the standard, the direct-discharge enterprise discharges sewage to execute the comprehensive sewage discharge standard, and a pollutant discharge limit value is formulated; if the section water quality does not reach the standard, performing a second layer of analysis;
the second layer is used for controlling the total pollutant emission amount of the sewage treatment plant: for a sewage plant which does not reach the first-level A emission standard, the sewage treatment plant executes the first-level A emission standard, pollution load reduction is determined, the influence degree of the emission after pollutant reduction on river water quality is analyzed, the cross-section water quality result is checked, if the water quality reaches the standard, the sewage treatment plant executes the first-level A emission standard, and pollutant emission limit values are formulated; if the section water quality does not reach the standard, carrying out third layer analysis;
the third layer is to further control the inline source: all the direct drainage sources are discharged according to the quality standard of the surface water environment, pollution load reduction is calculated, the influence degree of pollutant discharge on river water quality is analyzed, the cross section water quality result is checked, if the water quality reaches the standard, the direct drainage sources execute the quality discharge standard of the surface water environment, and pollutant discharge limit values are formulated; if the section water quality does not reach the standard, performing a fourth layer of analysis;
the fourth layer is to control the total amount of the non-point source pollution load: analyzing the influence degree of the non-point source pollution load on the water quality after the non-point source pollution load is reduced, determining the emission limit value of the non-point source pollution load, and finally realizing that the water quality of the section reaches the standard;
s5, providing an optimal scheme for comprehensive treatment of point sources and non-point sources, reducing pollution load, improving water quality and meeting the target requirement of water quality.
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| CN108287950A (en) * | 2017-12-27 | 2018-07-17 | 环境保护部环境规划院 | Simulation of water quality method based on control unit quality of water environment objective management |
| CN109389251A (en) * | 2018-10-30 | 2019-02-26 | 江苏省环境科学研究院 | Total amount of pollutant optimizing distribution method based on control section water quality reaching standard |
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| US5646863A (en) * | 1994-03-22 | 1997-07-08 | Morton; Stephen G. | Method and apparatus for detecting and classifying contaminants in water |
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