Sewage toxicity detection system and method and electronic equipment

Abstract

The present invention relates to the field of sewage treatment, and provides a sewage toxicity detection system and method, and an electronic device, the system comprises: a data acquisition unit for acquiring a toxicity detection result of to-be-detected sewage, the toxicity detection result comprising photobacterium acute toxicity monitoring data and activated sludge nitrification function inhibition monitoring data; the toxicity evaluation unit is used for evaluating the toxicity of the to-be-detected sewage based on the toxicity detection result and a pre-constructed toxicity evaluation table, and determining the toxicity evaluation grade of the to-be-detected sewage; and the early warning regulation and control unit is used for carrying out early warning based on the toxicity evaluation grade of the sewage to be detected. The invention relates to sewage treatment equipment, in particular to a sewage treatment equipment, which is used for overcoming the defects of complex system, unstable continuous monitoring and large system error of the existing sewage plant inlet water toxicity monitoring equipment. In the scheme of the application, the toxicity in sewage is detected and early warned from two aspects of acute toxicity detection of photogenic bacteria and nitrification function inhibition of activated sludge; the accuracy and the stability of toxicity detection are higher.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a sewage toxicity detection system and method, and electronic equipment. Background Art

[0002] Biochemical treatment is the core link of urban sewage treatment process. The complexity of industrial wastewater composition poses a serious threat to the biochemical system. The large amount of microbial toxic substances that may be contained in it inhibit the normal metabolic process of microorganisms in the biochemical system, impact the biochemical system and even cause the collapse of the entire activated sludge system, resulting in unstable sewage treatment effect and substandard effluent quality. In order to restore the system, time-consuming and laborious re-inoculation, bacterial culture and restart work are often required, which brings great inconvenience to the daily operation and management of sewage treatment plants.

[0003] At present, the toxicity monitoring of sewage plant influent is usually based on the sludge respiration rate method. The respiration rate (Oxygen Uptakerate, referred to as OUR) is the oxygen consumption rate when activated sludge microorganisms aerobically utilize organic matter. It is a theoretical indicator to characterize the activity of activated sludge microorganisms. That is, the change of activated sludge OUR can reflect the degree of inhibition of microorganisms, and then it can be determined whether the influent contains toxic substances of activated sludge microorganisms and the degree of toxicity. However, the equipment based on this principle has problems such as complex system, unstable continuous monitoring, high maintenance requirements, and systematic errors between dual DO electrode equipment. Summary of the invention

[0004] The present invention provides a sewage toxicity detection system and method, and an electronic device, which are used to solve the defects of the existing sewage plant inlet toxicity monitoring equipment, such as complex system, unstable continuous monitoring and large system error. In the scheme of the present application, the toxicity in the sewage is detected and warned from two angles: the acute toxicity detection of luminous bacteria and the inhibition of the nitrification function of activated sludge, and the accuracy and stability of the toxicity detection are higher.

[0005] The present invention provides a sewage toxicity detection system, comprising:

[0006] A data acquisition unit, used to acquire toxicity test results of the wastewater to be tested, wherein the toxicity test results include luminous bacteria acute toxicity monitoring data and activated sludge nitrification function inhibition monitoring data;

[0007] A toxicity evaluation unit, used to evaluate the toxicity of the sewage to be tested based on the toxicity detection result and a pre-constructed toxicity evaluation table, and determine the toxicity evaluation level of the sewage to be tested;

[0008] The early warning control unit is used to issue an early warning based on the toxicity evaluation level of the sewage to be tested.

[0009] According to the sewage toxicity detection system provided by the present invention, the data acquisition unit includes a luminous bacteria acute toxicity monitoring unit and an activated sludge nitrification function inhibition detection unit;

[0010] The luminescent bacteria acute toxicity monitoring unit is used to monitor the luminescent intensity of the luminescent bacteria, and the luminescent bacteria are added to the sewage to be tested by an operator;

[0011] The activated sludge nitrification function inhibition detection unit is used to monitor the ammonia nitrogen concentration value of the mixture, and the mixture includes the activated sludge and the sewage to be tested.

[0012] According to the sewage toxicity detection system provided by the present invention, the toxicity evaluation unit is specifically used for:

[0013] Calculate and determine the luminous bacteria inhibition rate, ammonia nitrogen detection difference and ammonia nitrogen removal rate based on the toxicity test results;

[0014] Determine the acute toxicity level of luminescent bacteria based on the luminescent bacteria inhibition rate, and determine the nitrification function inhibition toxicity level based on the ammonia nitrogen detection difference and the ammonia nitrogen removal rate;

[0015] The toxicity evaluation level of the wastewater to be tested is determined based on the acute toxicity level of the luminescent bacteria and the nitrification function inhibition toxicity level.

[0016] According to the sewage toxicity detection system provided by the present invention, the method of determining the nitrification function inhibition toxicity level based on the ammonia nitrogen detection difference and the ammonia nitrogen removal rate includes:

[0017] If the ammonia nitrogen detection difference is greater than or equal to the first threshold, the nitrification function inhibition toxicity level is determined to be level one; if the ammonia nitrogen detection difference is less than the first threshold, the nitrification function inhibition toxicity level is determined based on the ammonia nitrogen removal rate.

[0018] According to the sewage toxicity detection system provided by the present invention, the toxicity evaluation level is the highest value of the luminescent bacteria acute toxicity level and the nitrification function inhibition toxicity level.

[0019] According to the sewage toxicity detection system provided by the present invention, if the difference between the acute toxicity level of the luminescent bacteria and the nitrification function inhibition toxicity level is greater than a set threshold, the toxicity evaluation level is marked.

[0020] According to the sewage toxicity detection system provided by the present invention, the early warning and control unit is also used for:

[0021] Based on the toxicity evaluation level of the wastewater to be tested, the wastewater to be tested is regulated, and the regulation includes controlling the wastewater to be tested to flow to an emergency accident pool, and the emergency accident pool is used for short-term storage of the wastewater to be tested.

[0022] According to the sewage toxicity detection system provided by the present invention, the amount of the sewage to be tested that is drained into the emergency accident pool is determined based on the available volume of the emergency accident pool and the toxicity evaluation level of the sewage to be tested.

[0023] The present invention also provides a sewage toxicity detection method, comprising:

[0024] Obtaining toxicity test results of the wastewater to be tested, wherein the toxicity test results include luminous bacteria acute toxicity monitoring data and activated sludge nitrification function inhibition monitoring data;

[0025] Based on the toxicity test results and a pre-constructed toxicity evaluation table, the toxicity of the wastewater to be tested is evaluated to determine the toxicity evaluation level of the wastewater to be tested;

[0026] Based on the toxicity evaluation level of the sewage to be tested, an early warning is issued.

[0027] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, any of the above-mentioned wastewater toxicity detection methods is implemented.

[0028] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the computer program implements any of the above-mentioned wastewater toxicity detection methods.

[0029] The present invention also provides a computer program product, including a computer program, which implements any of the above-mentioned sewage toxicity detection methods when executed by a processor.

[0030] In the sewage toxicity detection system provided by the present invention, toxicity detection is performed from two dimensions: acute toxicity detection of luminous bacteria and inhibition of nitrification function of activated sludge. Detection in two directions can improve the comprehensiveness of the sewage detection process, and the detection in two directions can also verify each other to make the final detection result more accurate. Not only that, after obtaining the corresponding data, the toxicity of the sewage to be tested can be evaluated based on a pre-constructed evaluation table. By pre-constructing the evaluation table, the complexity of the evaluation system can be reduced, the time of the toxicity detection process can be shortened, the timeliness of the evaluation result can be improved, and the accuracy of the detection can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 is a schematic diagram of the structure of a sewage toxicity detection system provided by an embodiment of the present invention;

[0033] Figure 2 This is one of the flow charts of the sewage toxicity detection method provided in the embodiment of the present invention;

[0034] Figure 3 This is the second flow chart of the sewage toxicity detection method provided by the embodiment of the present invention;

[0035] Figure 4 It is a schematic diagram of the physical structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0037] Figure 1 It is a schematic diagram of the structure of a sewage toxicity detection system provided in an embodiment of the present invention.

[0038] like Figure 1 As shown, this embodiment provides a sewage toxicity detection system, including:

[0039] The data acquisition unit 101 is used to acquire the toxicity test results of the sewage to be tested, wherein the toxicity test results include the luminous bacteria acute toxicity monitoring data and the activated sludge nitrification function inhibition monitoring data;

[0040] A toxicity evaluation unit 102 is used to evaluate the toxicity of the wastewater to be tested based on the toxicity detection result and a pre-constructed toxicity evaluation table, and determine the toxicity evaluation level of the wastewater to be tested;

[0041] The early warning control unit 103 is used to issue an early warning based on the toxicity evaluation level of the wastewater to be tested.

[0042] The luminous bacteria acute toxicity monitoring data refers to the data obtained by adding luminous bacteria to sewage and then detecting the luminous intensity of the luminous bacteria, wherein luminous bacteria refers to a kind of bacteria that contains luminescent elements such as luciferin, luciferase, ATP, etc., and produces weak fluorescence through intracellular biochemical reactions under aerobic conditions. In this embodiment, luminous bacteria such as Vibrio fischeri can be used for luminous bacteria acute toxicity monitoring.

[0043] The activated sludge nitrification function inhibition monitoring data refers to the data obtained by adding activated sludge to the sewage to be tested and then monitoring the nitrification function of the activated sludge. The nitrification function of the activated sludge can be evaluated from two perspectives: the difference in ammonia nitrogen detection before and after adding sewage and the ammonia nitrogen removal rate.

[0044] In practical applications, the toxicity evaluation table may include the luminous bacteria acute toxicity evaluation table and the activated sludge nitrification function consistency evaluation table. The toxicity of the wastewater to be tested is evaluated separately through the two tables, and then the final toxicity evaluation level is determined by combining the two evaluation results.

[0045] In implementation, the sewage toxicity detection system described in this embodiment can be applied to sewage treatment plants. Therefore, the early warning and control unit can also perform early warning work in the sewage treatment plant based on the toxicity evaluation level of the sewage to be tested. Furthermore, the early warning and control unit can also start the control work at the same time after issuing the early warning signal. Specifically, different control work can be performed based on different toxicity evaluation levels to achieve better treatment of sewage.

[0046] In the sewage toxicity detection system provided in this embodiment, toxicity detection is performed from two dimensions: acute toxicity detection of luminous bacteria and inhibition of nitrification function of activated sludge. Detection in two directions can improve the comprehensiveness of the sewage detection process, and the detection in two directions can also verify each other to make the final detection result more accurate. Not only that, after obtaining the corresponding data, the toxicity of the sewage to be tested can be evaluated based on a pre-constructed evaluation table. By pre-constructing an evaluation table, the complexity of the evaluation system can be reduced, the time of the toxicity detection process can be shortened, the timeliness of the evaluation results can be improved, and the accuracy of the detection can be further improved.

[0047] In an exemplary embodiment, the data acquisition unit includes a luminescent bacteria acute toxicity monitoring unit and an activated sludge nitrification function inhibition detection unit;

[0048] The luminescent bacteria acute toxicity monitoring unit is used to monitor the luminescent intensity of the luminescent bacteria, and the luminescent bacteria are added to the sewage to be tested by an operator;

[0049] The activated sludge nitrification function inhibition detection unit is used to monitor the ammonia nitrogen concentration value of the mixture, and the mixture includes the activated sludge and the sewage to be tested.

[0050] In practical applications, Vibrio fischeri can be used as the indicator luminescent bacteria in the luminescent bacteria acute toxicity monitoring unit, and the detection steps are as follows: (1) bacterial strain resuscitation and preparation of bacterial suspension; (2) preparation of reference solution and treatment of wastewater to be tested; (3) luminescence intensity detection and calculation of inhibition rate.

[0051] The method for resuscitating the strain in (1) is as follows: adding a 2% NaCl solution to the freeze-dried powder of Vibrio fischeri, with the ratio of the freeze-dried powder of Vibrio fischeri to the NaCl solution being 1 mg:1 mL; after fully mixing, placing the mixture at 15°C for 15 minutes to allow the Vibrio fischeri to resume stable luminescence, thereby obtaining a luminescent bacteria resuscitation solution.

[0052] (1) The preparation method of the bacterial suspension is as follows: dilute the luminescent bacteria resuscitation solution with a 2% NaCl solution, mix thoroughly, and then measure the luminescence intensity until a luminescent bacterial suspension with a suitable luminescence intensity is obtained.

[0053] In practical applications, a 2% NaCl solution can be added to the freeze-dried Vibrio fischeri powder, with the ratio of freeze-dried Vibrio fischeri powder to NaCl solution being 1 mg:1 mL. After sufficient mixing, the mixture is placed at 15°C for 15 minutes to allow Vibrio fischeri to recover stable luminescence and obtain a luminescent bacteria resuscitation solution. The luminescent bacteria resuscitation solution is diluted with a 2% NaCl solution, mixed thoroughly, and the luminescence intensity is measured until a luminescent bacterial suspension with a suitable luminescence intensity is obtained.

[0054] (2) The preparation method of the reference solution is as follows: accurately weigh 4.4154 g of zinc sulfate heptahydrate that has been well sealed and stored, transfer it to a 1000 mL volumetric flask, dilute to the mark, and prepare a zinc sulfate heptahydrate mother solution, which is stored at 2 to 5°C for future use. The shelf life is 6 months. Transfer 2 mL of the zinc sulfate heptahydrate mother solution to a 1000 mL volumetric flask, dilute to the mark, and prepare a 2 mg / L zinc sulfate heptahydrate working solution, i.e., a reference solution.

[0055] In practical applications, 4.4154 g of well-sealed zinc sulfate heptahydrate can be accurately weighed and transferred into a 1000 mL volumetric flask, and the volume is adjusted to the mark to prepare a zinc sulfate heptahydrate mother solution, which is stored at 2-5°C for standby use and has a shelf life of 6 months. 2 mL of zinc sulfate heptahydrate mother solution is transferred into a 1000 mL volumetric flask, and the volume is adjusted to the mark to prepare a 2 mg / L zinc sulfate heptahydrate working solution, i.e., a reference solution.

[0056] (2) The method for treating the wastewater to be tested is as follows: the wastewater sample to be tested is filtered using a nitrocellulose membrane or a cellulose acetate membrane with a pore size of 0.45 μm, and the filtrate is used as the subsequent sample to be tested.

[0057] (3) The method for detecting the luminescence intensity is as follows: a reference group and a test group are included. The reference group is prepared by adding the bacterial suspension to each measuring cup, adding the reference solution, mixing, and measuring the luminescence intensity I c0 After reacting at 20℃ for t time, the luminescence intensity I is measured. ct The test group was to add the bacterial suspension to each measuring cup, add the sample to be tested, mix well and measure its luminescence intensity I s0 After reacting at 20℃ for t time, the luminescence intensity I is measured. st. Among them, t is usually 5min, 15min and 30min, and the specific reaction volume can be adjusted.

[0058] The calculation formula of the inhibition rate is:

[0059] The quality of the test is controlled by the quality control parameter CF value representing the performance of the luminescent bacteria during the test, CF = I ct / I c0 When the CF value is within the range of 0.6 to 1.8, it indicates that the performance of the luminescent bacteria is normal.

[0060] In practical applications, the activated sludge nitrification function inhibition detection unit uses activated sludge to simulate aerobic treatment of the wastewater to be tested, detects the ammonia nitrogen concentration before and after the treatment, and evaluates the inhibitory effect of pollutants in the wastewater on the nitrification function through the difference in ammonia nitrogen detection before and after one hour and the ammonia nitrogen removal rate. The detection steps are as follows: (1) The wastewater to be tested is mixed with the sludge and aerated; (2) After the initial mixing is uniform, a sample is taken to detect the ammonia nitrogen concentration value N0; (3) After the aeration is completed, a sample is taken to detect the ammonia nitrogen concentration value Nt; (4) The ammonia nitrogen detection difference ΔN and the ammonia nitrogen removal rate Nr are calculated.

[0061] In practice, the ratio of the sewage to be tested to the sludge can be 7:3, and the sludge comes from the activated sludge in the normally operating biochemical system of the corresponding sewage treatment plant.

[0062] The aeration time after the sewage to be tested is mixed with the sludge is 30-60 minutes. The aeration time can be fixed after preliminary monitoring of a specific sewage treatment plant.

[0063] The water samples were filtered and pre-treated before the ammonia nitrogen concentration was detected.

[0064] The ammonia nitrogen detection difference ΔN=N t -N 0 .

[0065] The ammonia nitrogen removal rate Nr = 1-N t / N 0 .

[0066] In practical applications, when the sewage to be tested is mixed with the sludge and aerated, the dissolved oxygen can be maintained at 2 mg / L.

[0067] In an exemplary embodiment, the toxicity evaluation unit is specifically used for:

[0068] Calculate and determine the luminous bacteria inhibition rate, ammonia nitrogen detection difference and ammonia nitrogen removal rate based on the toxicity test results;

[0069] Determine the acute toxicity level of luminescent bacteria based on the luminescent bacteria inhibition rate, and determine the nitrification function inhibition toxicity level based on the ammonia nitrogen detection difference and the ammonia nitrogen removal rate;

[0070] The toxicity evaluation level of the wastewater to be tested is determined based on the acute toxicity level of the luminescent bacteria and the nitrification function inhibition toxicity level.

[0071] In an exemplary embodiment, the step of determining the nitrification function inhibition toxicity level based on the ammonia nitrogen detection difference and the ammonia nitrogen removal rate includes:

[0072] If the ammonia nitrogen detection difference is greater than or equal to the first threshold, the nitrification function inhibition toxicity level is determined to be level one; if the ammonia nitrogen detection difference is less than the first threshold, the nitrification function inhibition toxicity level is determined based on the ammonia nitrogen removal rate.

[0073] During implementation, the toxicity evaluation unit uses three indicators: luminous bacteria inhibition rate (Lr), ammonia nitrogen detection difference (ΔN), and ammonia nitrogen removal rate (Nr) to evaluate the biological toxicity of the influent from two scales: acute toxicity of luminous bacteria and inhibition of nitrification function of activated sludge.

[0074] Specifically, according to the above embodiments, the toxicity evaluation table may include a luminescent bacteria acute toxicity evaluation table and an activated sludge nitrification function consistency evaluation table.

[0075] As shown in Table 1 below, in the luminescent bacteria acute toxicity evaluation table, according to the inhibition rate from low to high, the toxicity level can be divided into five levels (represented by I, II, III, IV, and V). When the luminescent bacteria inhibition rate is less than 10%, it is regarded as toxicity level I; when the luminescent bacteria inhibition rate is greater than 10% and less than 30%, it is regarded as toxicity level II; when the luminescent bacteria inhibition rate is greater than 30% and less than 50%, it is regarded as toxicity level III; when the luminescent bacteria inhibition rate is greater than 50% and less than 70%, it is regarded as toxicity level IV; when the luminescent bacteria inhibition rate is greater than 70%, it is regarded as toxicity level V. In practical applications, the dividing lines of the above toxicity levels can also be revised based on the monitoring data of the influent of a specific sewage treatment plant for three to six consecutive months.

[0076] In the activated sludge nitrification function consistent evaluation table, the difference in ammonia nitrogen detection (ΔN) and the ammonia nitrogen removal rate (Nr) are used for step-by-step graded evaluation. Specifically, the difference in ammonia nitrogen detection (ΔN) is used as the first step of evaluation. If ΔN ≥ 2 mg / L, it is considered to be nitrification function inhibition toxicity level I; if ΔN < 2 mg / L, it is further divided into five levels of nitrification function inhibition toxicity (represented by I, II, III, IV, and V) according to Nr ≥ 30%, 20%-30%, 10%-20%, 5%-10%, and < 5%. Similarly, the above-mentioned dividing lines can also be revised according to the actual ammonia nitrogen concentration monitoring values ​​of the influent of a specific sewage treatment plant for three to six consecutive months.

[0077] Table 1 Biological toxicity evaluation grade table

[0078]

[0079]

[0080] In an exemplary embodiment, the toxicity evaluation level is the highest value of the luminescent bacteria acute toxicity level and the nitrification function inhibition toxicity level.

[0081] That is, the toxicity evaluation level = MAX {luminescent bacteria acute toxicity level, nitrification function inhibition toxicity level}.

[0082] In an exemplary embodiment, if the difference between the luminescent bacteria acute toxicity level and the nitrification function inhibition toxicity level is greater than a set threshold, the toxicity evaluation level is marked.

[0083] In actual applications, if the acute toxicity level of luminous bacteria - the nitrification function inhibition toxicity level ≥ 2, L will be added after the level; if the nitrification function inhibition toxicity level - the acute toxicity level of luminous bacteria ≥ 2, N will be added after the level.

[0084] For example, when the acute toxicity level of the luminescent bacteria is level V and the nitrification function inhibition toxicity level is level II, the maximum value of the two toxicity levels is level V. Therefore, the toxicity evaluation level of the sewage to be tested can be determined to be level V. Since the acute toxicity level of the luminescent bacteria minus the nitrification function inhibition toxicity level>2, the final toxicity level is VL. Similarly, when the acute toxicity level of the luminescent bacteria is level I and the nitrification function inhibition toxicity level is level IV, the maximum value of the two toxicity levels is level IV. Therefore, the toxicity evaluation level of the sewage to be tested can be determined to be level IV. Since the acute toxicity level of the luminescent bacteria minus the nitrification function inhibition toxicity level>2, the final toxicity level is IV-N.

[0085] In an exemplary embodiment, the early warning control unit is also used for:

[0086] Based on the toxicity evaluation level of the wastewater to be tested, the wastewater to be tested is regulated, and the regulation includes controlling the wastewater to be tested to flow to an emergency accident pool, and the emergency accident pool is used for short-term storage of the wastewater to be tested.

[0087] In an exemplary embodiment, the amount of the test sewage that is drained into the emergency pool is determined based on the available volume of the emergency pool and the toxicity evaluation level of the test sewage.

[0088] The available volume of the emergency pool is the volume that can be used to accommodate sewage.

[0089] In practical applications, some of the control measures of the early warning control unit can be referred to in Table 2 below:

[0090] Table 2 Measurement and control strategy

[0091]

[0092] For example, the sewage toxicity monitoring results of a sewage treatment plant show that the toxicity evaluation level is VL, and the available volume ratio of the emergency accident pool is 37%. According to Table 2 above, it can be determined that the measurement and control strategy is B+Q+mandatory, that is, 60% of the sewage to be tested is intercepted in the emergency accident pool, while reducing the inlet flow rate and intensively monitoring the inlet until the warning is lifted; M2-pay attention to changes in effluent water quality and adjust the strategy in time; S-investigate and cut off abnormal water sources.

[0093] The sewage toxicity detection method provided by the present invention is described below. The sewage toxicity detection method described below and the sewage toxicity detection system described above can be referenced to each other.

[0094] Figure 2 This is one of the flow charts of the sewage toxicity detection method provided in the embodiment of the present invention.

[0095] Figure 3 This is the second flow chart of the sewage toxicity detection method provided in the embodiment of the present invention.

[0096] like Figure 2 and Figure 3 As shown, the sewage toxicity detection method provided in this embodiment includes:

[0097] Step 301, obtaining toxicity test results of the wastewater to be tested, wherein the toxicity test results include luminous bacteria acute toxicity monitoring data and activated sludge nitrification function inhibition monitoring data;

[0098] Step 302, based on the toxicity detection result and the pre-constructed toxicity evaluation table, the toxicity of the wastewater to be tested is evaluated to determine the toxicity evaluation level of the wastewater to be tested;

[0099] Step 303: issuing an early warning based on the toxicity evaluation level of the wastewater to be tested.

[0100] In an exemplary embodiment, the step of obtaining the toxicity test result of the wastewater to be tested includes:

[0101] Adding luminescent bacteria to the wastewater to be tested, and monitoring the luminescence intensity of the luminescent bacteria;

[0102] Mix the sewage to be tested and the activated sludge evenly, and monitor the ammonia nitrogen concentration of the mixture.

[0103] In an exemplary embodiment, the toxicity of the wastewater to be tested is evaluated based on the toxicity detection result and a pre-constructed toxicity evaluation table, and the toxicity evaluation level of the wastewater to be tested is determined, including:

[0104] Calculate and determine the luminous bacteria inhibition rate, ammonia nitrogen detection difference and ammonia nitrogen removal rate based on the toxicity test results;

[0105] Determine the acute toxicity level of luminescent bacteria based on the luminescent bacteria inhibition rate, and determine the nitrification function inhibition toxicity level based on the ammonia nitrogen detection difference and the ammonia nitrogen removal rate;

[0106] The toxicity evaluation level of the wastewater to be tested is determined based on the acute toxicity level of the luminescent bacteria and the nitrification function inhibition toxicity level.

[0107] In an exemplary embodiment, the step of determining the nitrification function inhibition toxicity level based on the ammonia nitrogen detection difference and the ammonia nitrogen removal rate includes:

[0108] If the ammonia nitrogen detection difference is greater than or equal to the first threshold, the nitrification function inhibition toxicity level is determined to be level one; if the ammonia nitrogen detection difference is less than the first threshold, the nitrification function inhibition toxicity level is determined based on the ammonia nitrogen removal rate.

[0109] In an exemplary embodiment, the toxicity evaluation level is the highest value of the luminescent bacteria acute toxicity level and the nitrification function inhibition toxicity level.

[0110] In an exemplary embodiment, the sewage toxicity detection method further includes:

[0111] If the difference between the luminescent bacteria acute toxicity level and the nitrification function inhibition toxicity level is greater than a set threshold, the toxicity evaluation level is marked.

[0112] In an exemplary embodiment, the early warning based on the toxicity evaluation level of the wastewater to be tested includes:

[0113] Based on the toxicity evaluation level of the sewage to be tested, the sewage to be tested is regulated, and the regulation includes draining the sewage to be tested to an emergency accident pool, and the emergency accident pool is used for short-term storage of the sewage to be tested.

[0114] In an exemplary embodiment, the amount of the test sewage that is drained into the emergency pool is determined based on the available volume of the emergency pool and the toxicity evaluation level of the test sewage.

[0115] The specific implementation method of the sewage toxicity detection method provided in this embodiment can be implemented with reference to the above embodiments, which will not be repeated here.

[0116] Several embodiments are used below to illustrate the sewage toxicity detection system and method provided by the solution of the present application.

[0117] Example 1

[0118] At a certain moment, 4L of sewage was continuously collected from the main inlet pipe of a sewage treatment plant (industrial sewage and domestic sewage in the inlet water were 7:3), of which 3.5L was mixed with 0.5L of activated sludge from the biochemical system of the sewage treatment plant. Aeration and stirring were started for one minute, and the initial ammonia nitrogen concentration value N0 was sampled and tested. After aeration was continued for 1 hour, the ammonia nitrogen concentration value N after aerobic treatment was sampled again. 60 . In addition, 10 mL of the 0.5 L sewage sample was filtered for luminous bacteria acute toxicity test, and the rest of the samples were kept for the test of other physical and chemical indicators. After measurement and calculation, the luminous bacteria inhibition rate was 9%, and the difference in ammonia nitrogen detection was 3.2 mg / L. The comprehensive evaluation level of biological toxicity of the sewage plant influent water sample was level I, which was normal influent and no emergency measures were required.

[0119] Example 2

[0120] At a certain moment, 4L of sewage was continuously collected from the main inlet pipe of a sewage treatment plant (industrial sewage and domestic sewage in the inlet water were 7:3), of which 3.5L was mixed with 0.5L of activated sludge from the biochemical system of the sewage treatment plant. Aeration and stirring were started for one minute, and the initial ammonia nitrogen concentration value N0 was sampled and tested. After aeration was continued for 1 hour, the ammonia nitrogen concentration value N after aerobic treatment was sampled again. 60 . In addition, from the 0.5L sewage sample, 10mL was filtered for luminous bacteria acute toxicity detection, and the other samples were retained for the detection of other physical and chemical indicators. After measurement and calculation, the luminous bacteria inhibition rate was 25%, the ammonia nitrogen detection difference was 1.2mg / L, and the ammonia nitrogen removal rate was 30%. The comprehensive evaluation level of biological toxicity of the sewage plant influent water sample was II, which was weakly inhibited influent. At this time, the monitoring results of the emergency accident pool show that the available volume ratio of the accident pool is 50%. The control strategy "C+ must be selected" can be selected, and emergency measures can be taken to divert 30% of the influent to the accident pool. At the same time, the influent monitoring should be intensified until the warning is lifted, and attention should be paid to changes in effluent water quality, and strategies should be adjusted in time to investigate and cut off abnormal water sources.

[0121] Example 3

[0122] At a certain moment, 4L of sewage was continuously collected from the main inlet pipe of a sewage treatment plant (industrial sewage and domestic sewage in the inlet water were 7:3), of which 3.5L was mixed with 0.5L of activated sludge from the biochemical system of the sewage treatment plant. Aeration and stirring were started for one minute, and the initial ammonia nitrogen concentration value N0 was sampled and tested. After aeration was continued for 1 hour, the ammonia nitrogen concentration value N after aerobic treatment was sampled again. 60. In addition, from the 0.5L sewage sample, 10mL was filtered for luminous bacteria acute toxicity detection, and other samples were retained for the detection of other physical and chemical indicators. After measurement and calculation, the inhibition rate of luminous bacteria was 45%, and the difference in ammonia nitrogen detection was 2mg / L. The comprehensive evaluation level of biological toxicity of the sewage plant influent water sample was III-L, which belongs to the acute toxicity of special luminous bacteria that inhibits influent. At this time, the available volume ratio of the emergency accident pool is 25%. The control strategy "C+Q+Required" can be selected, and emergency measures can be taken to reduce the influent flow rate, and 30% of the influent will be diverted to the accident pool. At the same time, the influent monitoring will be intensified until the warning is lifted, and attention will be paid to changes in effluent water quality. Adjust the strategy in time, investigate and cut off abnormal water sources.

[0123] Example 4

[0124] At a certain moment, 4L of sewage was continuously collected from the main inlet pipe of a sewage treatment plant (industrial sewage and domestic sewage in the inlet water were 7:3), of which 3.5L was mixed with 0.5L of activated sludge from the biochemical system of the sewage treatment plant. Aeration and stirring were started for one minute, and the initial ammonia nitrogen concentration value N0 was sampled and tested. After aeration was continued for 1 hour, the ammonia nitrogen concentration value N after aerobic treatment was sampled again. 60 . In addition, from the 0.5L sewage sample, 10mL was taken for filtration for acute toxicity detection of luminous bacteria, and other samples were retained for detection of other physical and chemical indicators. After measurement and calculation, the inhibition rate of luminous bacteria was 45%, the difference in ammonia nitrogen detection was 1.2mg / L, and the ammonia nitrogen removal rate was 15%. The comprehensive evaluation level of biological toxicity of the sewage plant influent water sample was III, which belongs to the inhibition of influent in biological toxicity. At this time, the available volume ratio of the emergency accident pool is 60%, and the control strategy "B+ must be selected" can be selected. Emergency measures should be taken to divert 60% of the influent to the accident pool. At the same time, the influent monitoring should be intensified until the warning is lifted, attention should be paid to changes in effluent water quality, and strategies should be adjusted in time to investigate and cut off abnormal water sources.

[0125] Example 5

[0126] At a certain moment, 4L of sewage was continuously collected from the main inlet pipe of a sewage treatment plant (industrial sewage and domestic sewage in the inlet water were 7:3), of which 3.5L was mixed with 0.5L of activated sludge from the biochemical system of the sewage treatment plant. Aeration and stirring were started for one minute, and the initial ammonia nitrogen concentration value N0 was sampled and tested. After aeration was continued for 1 hour, the ammonia nitrogen concentration value N after aerobic treatment was sampled again. 60. In addition, from the 0.5L sewage sample, 10mL was filtered for luminous bacteria acute toxicity detection, and other samples were retained for the detection of other physical and chemical indicators. After measurement and calculation, the luminous bacteria inhibition rate was 25%, the ammonia nitrogen detection difference was 1.2mg / L, and the ammonia nitrogen removal rate was 8%. The comprehensive evaluation level of biological toxicity of the sewage plant influent water sample was IV-N, which belongs to the special nitrification function with high inhibition of toxic abnormal influent. At this time, the monitoring results of the emergency accident pool show that the available volume ratio of the accident pool is 30%. The control strategy "B+Q+Required" should be selected immediately, and emergency measures should be taken to reduce the influent flow rate, and 60% of the influent should be diverted to the accident pool. At the same time, the influent monitoring should be intensified until the warning is lifted, attention should be paid to changes in the effluent water quality, and the strategy should be adjusted in time to investigate and cut off the abnormal water source.

[0127] Example 6

[0128] At a certain moment, 4L of sewage was continuously collected from the main inlet pipe of a sewage treatment plant (industrial sewage and domestic sewage in the inlet water were 7:3), of which 3.5L was mixed with 0.5L of activated sludge from the biochemical system of the sewage treatment plant. Aeration and stirring were started for one minute, and the initial ammonia nitrogen concentration value N0 was sampled and tested. After aeration was continued for 1 hour, the ammonia nitrogen concentration value N after aerobic treatment was sampled again. 60 . In addition, from the 0.5L sewage sample, 10mL was filtered for luminous bacteria acute toxicity detection, and other samples were retained for the detection of other physical and chemical indicators. After measurement and calculation, the luminous bacteria inhibition rate was 70%, the ammonia nitrogen detection difference was 0.4mg / L, and the ammonia nitrogen removal rate was 3%. The comprehensive evaluation level of biological toxicity of the sewage plant influent water sample was V, which was an abnormal influent with extremely high biological toxicity. At this time, the monitoring results of the emergency accident pool show that the accident pool is empty, that is, the available volume ratio is 100%. The control strategy "A+ must be selected" should be selected immediately, and emergency measures should be taken to intercept all the influent to the accident pool for pretreatment before it can enter the sewage biological treatment system. At the same time, the influent monitoring should be intensified until the warning is lifted, attention should be paid to changes in the effluent water quality, and the strategy should be adjusted in time. The source should be traced and investigated immediately and the abnormal water source should be cut off.

[0129] Example 7

[0130] 4L of sewage was collected from the main inlet pipe of a sewage treatment plant (industrial sewage and domestic sewage in the inlet water were 6:4), of which 3.5L was mixed with 0.5L of activated sludge from the biochemical system of the sewage treatment plant. Aeration and stirring were started for one minute, and the initial ammonia nitrogen concentration value N0 was sampled and tested. After aeration was continued for 1 hour, the ammonia nitrogen concentration value N after aerobic treatment was sampled again. 60 . In addition, 10 mL of the 0.5 L sewage sample was filtered for the acute toxicity test of luminescent bacteria, and the rest of the sample was kept for the test of other physical and chemical indicators. After 3 months of continuous monitoring, the Nr grade division boundary was adjusted as shown in the following table.

[0131]

[0132]

[0133] Figure 4 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 4 As shown, the electronic device may include: a processor 410, a communications interface 420, a memory 430 and a communication bus 440, wherein the processor 410, the communications interface 420 and the memory 430 communicate with each other via the communication bus 440. The processor 410 may call the logic instructions in the memory 430 to execute the sewage toxicity detection method, which includes:

[0134] Obtaining toxicity test results of the wastewater to be tested, wherein the toxicity test results include luminous bacteria acute toxicity monitoring data and activated sludge nitrification function inhibition monitoring data;

[0135] Based on the toxicity test results and a pre-constructed toxicity evaluation table, the toxicity of the wastewater to be tested is evaluated to determine the toxicity evaluation level of the wastewater to be tested;

[0136] Based on the toxicity evaluation level of the sewage to be tested, an early warning is issued.

[0137] In addition, the logic instructions in the above-mentioned memory 430 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, RandomAccess Memory), disk or optical disk, etc. Various media that can store program codes.

[0138] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored in a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the wastewater toxicity detection method provided by the above methods, which includes:

[0139] Obtaining toxicity test results of the wastewater to be tested, wherein the toxicity test results include luminous bacteria acute toxicity monitoring data and activated sludge nitrification function inhibition monitoring data;

[0140] Based on the toxicity test results and a pre-constructed toxicity evaluation table, the toxicity of the wastewater to be tested is evaluated to determine the toxicity evaluation level of the wastewater to be tested;

[0141] Based on the toxicity evaluation level of the sewage to be tested, an early warning is issued.

[0142] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented when the computer program is executed by a processor to perform the wastewater toxicity detection method provided by the above methods, the method comprising:

[0143] Obtaining toxicity test results of the wastewater to be tested, wherein the toxicity test results include luminous bacteria acute toxicity monitoring data and activated sludge nitrification function inhibition monitoring data;

[0144] Based on the toxicity test results and a pre-constructed toxicity evaluation table, the toxicity of the wastewater to be tested is evaluated to determine the toxicity evaluation level of the wastewater to be tested;

[0145] Based on the toxicity evaluation level of the sewage to be tested, an early warning is issued.

[0146] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, i.e., they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0147] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or some parts of the embodiment.

[0148] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Wastewater toxicity detection system, characterized in that: include: A data acquisition unit, used to acquire toxicity test results of the wastewater to be tested, wherein the toxicity test results include luminous bacteria acute toxicity monitoring data and activated sludge nitrification function inhibition monitoring data; A toxicity evaluation unit, used to evaluate the toxicity of the sewage to be tested based on the toxicity detection result and a pre-constructed toxicity evaluation table, and determine the toxicity evaluation level of the sewage to be tested; The early warning control unit is used to issue an early warning based on the toxicity evaluation level of the sewage to be tested.

2. The sewage toxicity detection system according to claim 1, characterized in that: The data acquisition unit includes a luminous bacteria acute toxicity monitoring unit and an activated sludge nitrification function inhibition detection unit; The luminescent bacteria acute toxicity monitoring unit is used to monitor the luminescent intensity of the luminescent bacteria, and the luminescent bacteria are added to the sewage to be tested by an operator; The activated sludge nitrification function inhibition detection unit is used to monitor the ammonia nitrogen concentration value of the mixture, and the mixture includes the activated sludge and the sewage to be tested.

3. The sewage toxicity detection system according to claim 1, characterized in that: The toxicity evaluation unit is specifically used for: Calculate and determine the luminous bacteria inhibition rate, ammonia nitrogen detection difference and ammonia nitrogen removal rate based on the toxicity test results; Determine the acute toxicity level of luminescent bacteria based on the luminescent bacteria inhibition rate, and determine the nitrification function inhibition toxicity level based on the ammonia nitrogen detection difference and the ammonia nitrogen removal rate; The toxicity evaluation level of the wastewater to be tested is determined based on the acute toxicity level of the luminescent bacteria and the nitrification function inhibition toxicity level.

4. The sewage toxicity detection system according to claim 3, characterized in that: The determining of the nitrification function inhibition toxicity level based on the ammonia nitrogen detection difference and the ammonia nitrogen removal rate includes: If the ammonia nitrogen detection difference is greater than or equal to the first threshold, the nitrification function inhibition toxicity level is determined to be level one; if the ammonia nitrogen detection difference is less than the first threshold, the nitrification function inhibition toxicity level is determined based on the ammonia nitrogen removal rate.

5. The sewage toxicity detection system according to claim 3, characterized in that: The toxicity evaluation level is the highest value of the luminescent bacteria acute toxicity level and the nitrification function inhibition toxicity level.

6. The sewage toxicity detection system according to claim 5, characterized in that: If the difference between the luminescent bacteria acute toxicity level and the nitrification function inhibition toxicity level is greater than a set threshold, the toxicity evaluation level is marked.

7. The sewage toxicity detection system according to claim 1, characterized in that: The early warning control unit is also used for: Based on the toxicity evaluation level of the wastewater to be tested, the wastewater to be tested is regulated, and the regulation includes controlling the wastewater to be tested to flow to an emergency accident pool, and the emergency accident pool is used for short-term storage of the wastewater to be tested.

8. The sewage toxicity detection system according to claim 7, characterized in that: The amount of the sewage to be tested that is drained into the emergency pool is determined based on the available volume of the emergency pool and the toxicity evaluation level of the sewage to be tested.

9. A method for detecting wastewater toxicity, characterized in that: include: Obtaining toxicity test results of the wastewater to be tested, wherein the toxicity test results include luminous bacteria acute toxicity monitoring data and activated sludge nitrification function inhibition monitoring data; Based on the toxicity test results and a pre-constructed toxicity evaluation table, the toxicity of the wastewater to be tested is evaluated to determine the toxicity evaluation level of the wastewater to be tested; Based on the toxicity evaluation level of the sewage to be tested, an early warning is issued.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the sewage toxicity detection method as claimed in claim 9 is implemented.

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