Industrial park sewage near-zero discharge monitoring method and system

Abstract

The invention relates to the technical field of sewage treatment, and discloses an industrial park sewage near-zero discharge monitoring method and system, and the method comprises the steps: obtaining corresponding pollution index data of a target region according to the detection data of a monitoring point; acquiring a water pollution absolute threshold according to the historical pollution index data; and carrying out trace secretly-discharging analysis according to the pollution index data and the water pollution absolute threshold value, and judging whether sewage is secretly discharged in the industrial park. The method comprises the following steps: converting detection data of a monitoring point into pollution index data capable of being comprehensively quantified, determining pollution index data, namely a water pollution absolute threshold value, of a target area when no sewage is discharged normally according to historical pollution index data, and performing trace secret discharge analysis by combining the pollution index data and the water pollution absolute threshold value. The situation that sewage treatment standards of park enterprises are reduced and are difficult to discover in time is avoided as much as possible.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a method and system for monitoring near-zero discharge of sewage in an industrial park. Background Art

[0002] Near-zero discharge of industrial wastewater refers to the reuse of wastewater generated in industrial parks through a series of sewage treatment technologies, and the crystallization of salts and pollutants in wastewater through salt separation technology, followed by harmless treatment and resource utilization, ultimately achieving no waste liquid discharged from the factory. The implementation significance of this concept is that it can reduce harm to the environment, save water resources, reduce production costs, and improve economic and social benefits.

[0003] Currently, pollution monitoring of wastewater discharge relies on special equipment and sensors at the monitoring points, which can be compared with preset standard values ​​to determine whether there is any illegal discharge of sewage. However, the preset standard values ​​are difficult to set accurately, and there are also cases where unexpected factors other than pollution emission factors lead to misjudgment, which needs to be solved. Summary of the invention

[0004] The purpose of the present invention is to provide a method and system for monitoring near-zero discharge of sewage in industrial parks to solve the following technical problems:

[0005] How to accurately detect illegal discharges by factories meeting near-zero emission requirements and locate the points of illegal discharges.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A method for monitoring near-zero discharge of sewage in an industrial park, comprising:

[0008] Obtain the corresponding pollution index data of the target area according to the detection data of the monitoring point;

[0009] Obtaining an absolute threshold value of water pollution based on historical pollution index data;

[0010] A trace amount of illegal discharge analysis is conducted based on the pollution index data and the absolute threshold of water pollution to determine whether the industrial park is illegally discharging sewage.

[0011] Through the above technical scheme, the present invention converts the detection data of the monitoring point into comprehensive and quantifiable pollution index data, and then determines the pollution index data when there is no normal sewage discharge in the target area based on the historical pollution index data, that is, the absolute threshold of water pollution. The pollution index data and the absolute threshold of water pollution are combined to analyze the trace illegal discharge, so as to avoid the situation where it is difficult to discover in time that the park enterprises lower the sewage treatment standards, and timely discover and deal with it.

[0012] As a further solution of the present invention: the method for obtaining the corresponding pollution index data of the target area according to the detection data of the monitoring point includes:

[0013]

[0014] Among them, W i (t) represents the pollution index data of the i-th monitoring point at time t, is the preset weight coefficient corresponding to the qth water quality index concentration at the ith monitoring point, WQPI q (t) represents the pollution index corresponding to the concentration of the qth water quality indicator at the ith monitoring point at time t.

[0015] As a further solution of the present invention: the method for obtaining the absolute threshold of water pollution based on the historical pollution index data includes:

[0016] Extracting pollution-free data of the industrial park during the emission stop period Δt from the pollution index data;

[0017] Calculate the water pollution absolute threshold Thr according to the pollution-free data W ;

[0018]

[0019] Where Δt is t A Time to t B The duration of the moment.

[0020] As a further solution of the present invention: the method for analyzing trace amounts of evacuation comprises:

[0021] Select a specified time period T and divide it into m equal segments. The nth time segment T n The duration is Δtp;

[0022]

[0023] Among them, S i (t) is the absolute pollution index of the i-th monitoring point at time t;

[0024]

[0025] in, For the nth time segment T n The evaluation index of the stealing within, t 1n and t 2n The time segments T n The start and end time of ThS Δtp is the preset threshold associated with the duration of Δtp, T0 is the time segment Tn The cumulative duration of the independent zero intervals in The time segment T n The number of independent non-zero intervals in , and are respectively the time segments T n The maximum and minimum values ​​of S(t) within.

[0026] As a further solution of the present invention: the method for analyzing trace amounts of evacuation also includes:

[0027]

[0028] Among them, X iT is the random inspection illegal discharge index corresponding to the i-th monitoring point in the specified time period T;

[0029] If X T (t)>Thr X , start tracing the source of illegal discharge, Thr X The preset sampling threshold.

[0030] As a further solution of the present invention: the tracing of the source of illegal discharge includes:

[0031] Arrange the random inspection illegal discharge indexes of different monitoring points in order from upstream to downstream;

[0032] Conduct source tracing visits to the monitoring points corresponding to the random inspection illegal discharge index that does not meet the descending rule.

[0033] An industrial park sewage near-zero discharge monitoring system, comprising:

[0034] A sampling module is used to obtain the corresponding pollution index data of the target area according to the detection data of the monitoring point;

[0035] A historical analysis module, used for obtaining an absolute threshold of water pollution based on the historical pollution index data;

[0036] The illegal discharge analysis module is used to perform trace illegal discharge analysis based on the pollution index data and the water pollution absolute threshold to determine whether the industrial park is illegally discharging sewage.

[0037] The beneficial effects of the present invention are as follows: the present invention converts the detection data of the monitoring points into pollution index data that can be comprehensively quantified, and then determines the pollution index data when there is no normal sewage discharge in the target area based on the historical pollution index data, that is, the absolute threshold of water pollution, and conducts trace illegal discharge analysis based on the comprehensive pollution index data and the absolute threshold of water pollution, so as to avoid the situation where it is difficult to discover in time that the park enterprises lower the sewage treatment standards, and timely discover and deal with it. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] Figure 1 It is a basic flow chart of the near-zero discharge monitoring method of industrial park wastewater in the present invention. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Near-zero discharge monitoring of industrial wastewater generally includes:

[0042] Sewage collection: A sewage collection system is set up at the sewage outlets of various factories and facilities in the industrial park to collect the sewage together.

[0043] Sewage pretreatment: The collected sewage is pretreated, including the removal of large particles of impurities, oil, suspended matter, etc., for subsequent treatment.

[0044] Deep treatment: The pre-treated sewage is subjected to deep treatment, including microbial treatment, activated carbon adsorption, ion exchange, etc., to further remove pollutants in the sewage.

[0045] Near-zero emissions: After deep treatment, sewage is separated from water and pollutants through evaporation, filtration, reverse osmosis and other technical means to achieve near-zero emissions.

[0046] Monitoring and analysis: At each stage of sewage treatment, water samples are collected for monitoring and analysis, including indicators such as chemical oxygen demand, biochemical oxygen demand, total organic carbon, ammonia nitrogen, phosphorus, etc., to evaluate the effectiveness of sewage treatment.

[0047] The present invention focuses on monitoring and verifying the target areas involved in near-zero emissions, and timely discovering and eliminating the phenomenon of illegal emissions by enterprises to the greatest extent possible.

[0048] See also Figure 1 As shown, the present invention is a method for monitoring near-zero discharge of sewage in an industrial park, comprising:

[0049] Obtain the corresponding pollution index data of the target area according to the detection data of the monitoring point;

[0050] Obtaining an absolute threshold value of water pollution based on historical pollution index data;

[0051] A trace amount of illegal discharge analysis is conducted based on the pollution index data and the absolute threshold of water pollution to determine whether the industrial park is illegally discharging sewage.

[0052] Through the above technical scheme, the present invention converts the detection data of the monitoring point into comprehensive and quantifiable pollution index data, and then determines the pollution index data when there is no normal sewage discharge in the target area based on the historical pollution index data, that is, the absolute threshold of water pollution. The pollution index data and the absolute threshold of water pollution are combined to analyze the trace illegal discharge, so as to avoid the situation where it is difficult to discover in time that the park enterprises lower the sewage treatment standards, and timely discover and deal with it.

[0053] As a further solution of the present invention: the method for obtaining the corresponding pollution index data of the target area according to the detection data of the monitoring point includes:

[0054]

[0055] Among them, W i (t) represents the pollution index data of the i-th monitoring point at time t, is the preset weight coefficient corresponding to the qth water quality index concentration at the ith monitoring point, WQPI q (t) represents the pollution index corresponding to the qth water quality index concentration at the i-th monitoring point at time t. The types of items corresponding to the water quality index concentrations vary according to the actual situation and can be reasonably set according to the specific situation. In the present invention, at least m water quality index concentrations can be set, such as ammonia nitrogen concentration, total phosphorus concentration, COD concentration, and permanganate index concentration.

[0056] As a further solution of the present invention: the method for obtaining the absolute threshold of water pollution based on the historical pollution index data includes:

[0057] Extracting pollution-free data of the industrial park during the emission stop period Δt from the pollution index data;

[0058] Calculate the water pollution absolute threshold Thr according to the pollution-free data W ;

[0059]

[0060] Where Δt is t A Time to t B The duration of the moment.

[0061] As a further solution of the present invention: the method for analyzing trace amounts of evacuation comprises:

[0062] Select a specified time period T and divide it into m equal segments. The nth time segment T n The duration is Δtp;

[0063]

[0064] Among them, S i (t) is the absolute pollution index of the i-th monitoring point at time t;

[0065]

[0066] in, For the nth time segment T n The evaluation index of the stealing within, t 1n and t 2n The time segments T n The start and end time of ThS Δtp is the preset threshold associated with the duration of Δtp, T0 is the time segment T n The cumulative duration of the independent zero intervals in The time segment T n The number of independent non-zero intervals in , and are respectively the time segments T n The maximum and minimum values ​​of S(t) within.

[0067] The trace amount of illegal discharge analysis method in this embodiment converts the pollution index data into S which is always greater than or equal to 0. i (t), S i The curve represented by (t) may exist in the horizontal axis of the corresponding coordinate system, where the straight line segments overlap the horizontal axis and the curved line segments are located above the horizontal axis; the straight line segments and the curved line segments may be arranged alternately, so the independent non-zero interval is the number of curved line segments, and the cumulative duration of the independent zero interval is the sum of the durations involved in the straight line segments;

[0068] If the factory discharges illegally or lowers the pollution treatment standards, S i (t) There is a high probability that there will not be many independent zero intervals, and the overall trend should be relatively flat. If there are short-term fluctuations, it may be caused by unknown foreign objects. Therefore, the trace discharge analysis method in this embodiment has strong anti-disturbance, which improves the monitoring efficiency and reduces the probability of misjudgment.

[0069] As a further solution of the present invention: the method for analyzing trace amounts of evacuation also includes:

[0070]

[0071] Among them, X iT is the random inspection illegal discharge index corresponding to the i-th monitoring point in the specified time period T;

[0072] If X T (t)>ThrX , start tracing the source of illegal discharge, Thr X The preset sampling threshold.

[0073] As a further solution of the present invention: the tracing of the source of illegal discharge includes:

[0074] Arrange the random inspection illegal discharge indexes of different monitoring points in order from upstream to downstream;

[0075] Conduct source tracing visits to the monitoring points corresponding to the random inspection illegal discharge index that does not meet the descending rule.

[0076] An industrial park sewage near-zero discharge monitoring system, comprising:

[0077] A sampling module is used to obtain the corresponding pollution index data of the target area according to the detection data of the monitoring point;

[0078] A historical analysis module, used for obtaining an absolute threshold of water pollution based on the historical pollution index data;

[0079] The illegal discharge analysis module is used to perform trace illegal discharge analysis based on the pollution index data and the water pollution absolute threshold to determine whether the industrial park is illegally discharging sewage.

[0080] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for monitoring near-zero discharge of wastewater in an industrial park, characterized in that: include: Obtain the corresponding pollution index data of the target area according to the detection data of the monitoring point; Obtaining an absolute threshold value of water pollution based on historical pollution index data; A trace amount of illegal discharge analysis is conducted based on the pollution index data and the absolute threshold of water pollution to determine whether the industrial park is illegally discharging sewage.

2. The method for monitoring near-zero discharge of wastewater in industrial parks according to claim 1, characterized in that: The method for obtaining the corresponding pollution index data of the target area according to the detection data of the monitoring point includes: Among them, W i (t) represents the pollution index data of the i-th monitoring point at time t, is the preset weight coefficient corresponding to the qth water quality index concentration at the ith monitoring point, WQPI q (t) represents the pollution index corresponding to the concentration of the qth water quality indicator at the ith monitoring point at time t.

3. The method for monitoring near-zero discharge of wastewater in industrial parks according to claim 2, characterized in that: The method for obtaining the absolute threshold of water pollution based on the historical pollution index data includes: Extracting pollution-free data of the industrial park during the emission stop period Δt from the pollution index data; Calculate the water pollution absolute threshold Thr according to the pollution-free data W ; Where Δt is t A Time to t B The duration of the moment.

4. The method for monitoring near-zero discharge of wastewater in industrial parks according to claim 3 is characterized in that: The method for the micro-amount stealing analysis comprises: Select a specified time period T and divide it into m equal segments. The nth time segment T n The duration is Δtp; Among them, S i (t) is the absolute pollution index of the i-th monitoring point at time t; in, For the nth time segment T n The evaluation index of the stealing within, t 1n and t 2n The time segments T n The start and end time of ThS Δtp is the preset threshold associated with the duration of Δtp, T0 is the time segment T n The cumulative duration of the independent zero intervals in The time segment T n The number of independent non-zero intervals in , and are respectively the time segments T n The maximum and minimum values ​​of S(t) within.

5. The method for monitoring near-zero discharge of wastewater in industrial parks according to claim 4 is characterized in that: The method for micro-amount stealing analysis also includes: Among them, X iT is the random inspection illegal discharge index corresponding to the i-th monitoring point in the specified time period T; If X T (t)>Thr X , start tracing the source of illegal discharge, Thr X The preset sampling threshold.

6. The method for monitoring near-zero discharge of wastewater in industrial parks according to claim 5, characterized in that: The illegal discharge tracing includes: Arrange the random inspection illegal discharge indexes of different monitoring points in order from upstream to downstream; Conduct source tracing visits to the monitoring points corresponding to the random inspection illegal discharge index that does not meet the descending rule.

7. An industrial park sewage near-zero discharge monitoring system, implementing an industrial park sewage near-zero discharge monitoring method as claimed in any one of claims 1 to 6, characterized in that: include: A sampling module is used to obtain the corresponding pollution index data of the target area according to the detection data of the monitoring point; A historical analysis module, used for obtaining an absolute threshold of water pollution based on the historical pollution index data; The illegal discharge analysis module is used to perform trace illegal discharge analysis based on the pollution index data and the water pollution absolute threshold to determine whether the industrial park is illegally discharging sewage.

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