CN207908494U - A kind of online oxicity analysis system - Google Patents
A kind of online oxicity analysis system Download PDFInfo
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- CN207908494U CN207908494U CN201720961318.5U CN201720961318U CN207908494U CN 207908494 U CN207908494 U CN 207908494U CN 201720961318 U CN201720961318 U CN 201720961318U CN 207908494 U CN207908494 U CN 207908494U
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- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 114
- 239000010865 sewage Substances 0.000 claims abstract description 54
- 231100000419 toxicity Toxicity 0.000 claims abstract description 43
- 230000001988 toxicity Effects 0.000 claims abstract description 43
- 238000005259 measurement Methods 0.000 claims abstract description 25
- 244000005700 microbiome Species 0.000 claims abstract description 25
- 230000036387 respiratory rate Effects 0.000 claims abstract description 18
- 230000002906 microbiologic effect Effects 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 61
- 229910052760 oxygen Inorganic materials 0.000 claims description 61
- 239000001301 oxygen Substances 0.000 claims description 61
- 239000010802 sludge Substances 0.000 claims description 51
- 238000000034 method Methods 0.000 claims description 48
- 239000007789 gas Substances 0.000 claims description 44
- 230000008569 process Effects 0.000 claims description 37
- 239000000523 sample Substances 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 230000000813 microbial effect Effects 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 16
- 239000002351 wastewater Substances 0.000 claims description 13
- 238000005273 aeration Methods 0.000 claims description 11
- 239000002699 waste material Substances 0.000 claims description 11
- 230000000241 respiratory effect Effects 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 7
- 230000005764 inhibitory process Effects 0.000 claims description 7
- 230000003647 oxidation Effects 0.000 claims description 7
- 238000007254 oxidation reaction Methods 0.000 claims description 7
- 235000015097 nutrients Nutrition 0.000 claims description 3
- 238000012258 culturing Methods 0.000 claims description 2
- 231100000086 high toxicity Toxicity 0.000 claims description 2
- 231100000614 poison Toxicity 0.000 abstract description 7
- 230000000875 corresponding effect Effects 0.000 abstract description 5
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
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- 231100000167 toxic agent Toxicity 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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- 238000010521 absorption reaction Methods 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
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- Activated Sludge Processes (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
Abstract
The utility model is related to a kind of online oxicity analysis systems, including active microorganism generator, mixing module and respiration rate measurement instrument, active microorganism generator are used to cultivate the microbiological materials for measurement, are connected to mixing module and are used for the microbiological materials of measurement to its conveying；Mixing module, which is used to introduce the microbiological materials for measuring from active microorganism generator and introduces sewage, forms aggregate sample, is connected to respiration rate measurement instrument and mixes sample to its conveying；Respiration rate measurement instrument is for introducing the aggregate sample from mixing module and detecting its toxicity.Actual sewage treatment plant is can be applied to, if a poisonous substance is leaked in sewage, the respiratory rate reduced suddenly will reflect.If respiratory rate rapidly reduces, it is less than a determining percentage, alarm will be triggered and execute corresponding action.
Description
Technical Field
The utility model relates to a sewage treatment field, concretely relates to online toxicity analysis system.
Background
Without an on-line toxicity detection system, wastewater containing toxic substances is not discovered until it enters a sewage treatment plant and contacts activated sludge and causes damage. The worst case is that the sludge has to be replaced again, during which time the waste water will not be effectively treated, which results in being very expensive. When toxic components in the wastewater are detected before reaching the treatment plant, the activated sludge can be prevented from being damaged, and the function of the system is called as an early warning system.
The respiration rate, also known as oxygen consumption rate, is the amount of oxygen consumed by the microorganisms per unit volume of the mixed liquor per unit time. The measurement of the respiration rate can be divided into two main categories according to the form of oxygen measured: one is to measure the concentration of dissolved oxygen in the liquid phase, called the liquid phase method; one is to measure the volume or concentration of gaseous oxygen in the gas phase, known as the gas phase method. Currently, liquid phase measurement methods are commonly used, which can be divided into two types according to the flow state of the liquid: one is an intermittent measurement method, i.e. the measured liquid is relatively fixed; the other is a continuous measurement method, i.e. the measured liquid is flowing and is continuously updated. The liquid phase measurement method generally comprises a small breathing chamber, which is connected with an aeration tank of an activated sludge system and is used as an oxygen absorption place, and a complete measurement system is formed by the liquid phase measurement method and measurement equipment of the dissolved oxygen concentration.
However, the measurement devices and methods in the prior art cannot realize online, continuous and real-time monitoring, and the loss is inevitable although the result is monitored after abnormality occurs.
SUMMERY OF THE UTILITY MODEL
To above prior art problem, the utility model aims at providing an online toxicity analysis system, degree of automation is high, easy operation, operation interface are friendly directly perceived, can be applied to actual sewage treatment plant, if a poison is revealed in sewage, the respiratory rate who reduces suddenly will reflect. If the breathing rate decreases rapidly, below a certain percentage, an alarm will be triggered and corresponding action performed. The specific technical scheme is as follows:
an on-line toxicity analysis system comprising an active microbial generator for culturing a microbial substance for measurement, a mixing module connected to the mixing module and to which the microbial substance for measurement is delivered, and a respiration rate meter; the mixing module is used for introducing microbial substances for measurement from the active microbial generator and introducing sewage to form a mixed sample, and the mixed sample is connected to the respiration rate tester and is conveyed to the respiration rate tester; the breath rate meter is used to introduce the mixed sample from the mixing module and to detect its toxicity.
Further, the system also comprises an intelligent sampler which is connected to a pipeline for introducing the sewage by the mixing module and is used for reserving the sewage with high toxicity; and/or, the mixing module includes an aeration tank for holding the microbiological materials for measurement and the sewage and continuously aerating to achieve a maximum respiration rate.
Further, the online respiration rate tester comprises a respiration chamber, an inlet, an outlet, a metering pump, a dissolved oxygen electrode/dissolved oxygen tester, a first three-way electromagnetic valve and a second three-way electromagnetic valve, wherein the inlet is connected to the metering pump; or, the online respiration rate tester comprises a respiration chamber, an inlet, an outlet, a metering pump, a dissolved oxygen electrode/dissolved oxygen tester, a first three-way electric valve and a second three-way electric valve, wherein the inlet is connected to the metering pump, the metering pump is respectively connected to the first three-way electric valve and the second three-way electric valve, the first three-way electric valve is connected to the upper end of the respiration chamber, the second three-way electric valve is connected to the lower end of the respiration chamber, and the first three-way electric valve and the second three-way electric valve are both connected; or, online respiration rate apparatus includes the respiratory chamber, and import, export, measuring pump, dissolved oxygen electrode dissolved oxygen apparatus, first and second three-way pneumatic valve, the access connection to measuring pump, the measuring pump is connected to first and second three-way pneumatic valve respectively, and first three-way pneumatic valve is connected to the upper end of respiratory chamber, and second three-way pneumatic valve is connected to the lower extreme of respiratory chamber, and first and second three-way pneumatic valve all are connected to the export.
Further, the dissolved oxygen electrode is arranged at the inlet and/or the outlet of the breathing chamber.
Further, the dissolved oxygen electrode or the probe of the dissolved oxygen meter is as close to the respiratory chamber as possible.
Further, the dissolved oxygen determinator comprises a sampling computer, a dissolved oxygen analyzer and a probe for detection in proximity to the respiratory chamber, which is connected to the dissolved oxygen analyzer, which is connected to the sampling computer for calculating respiration rate and/or other data.
Further, still include mixing module microbiological matter inlet pipe, and/or, mixing module sewage inlet pipe, and/or, mixing module mixing appearance outlet pipe, and/or, overflow pipe, and/or, respiration rate apparatus outlet pipe, wherein, active microbe generator is connected to mixing module through mixing module microbiological matter inlet pipe, sewage passes through mixing module sewage inlet pipe and gets into mixing module, mixing module mixes appearance outlet pipe through mixing module and is connected to respiration rate apparatus, overflow pipe is the overflow pipe of mixing module aeration jar, respiration rate apparatus outlet pipe is the outlet pipe of respiration rate apparatus.
Further, the system is an online toxicity analysis system based on the respiration rate of the activated sludge, the respiration rate determinator is an online respiration rate determinator, and the microbial substance for measurement is microbial sludge;
and/or the presence of a gas in the gas,
the device also comprises a return pipeline and/or a waste liquid pipeline, wherein the outlet pipeline of the overflow pipeline and/or the respiration rate measuring instrument is connected to the return pipeline and/or the waste liquid pipeline, and when the detection result shows that the waste water measured in the outlet pipeline of the overflow pipeline and/or the respiration rate measuring instrument does not contain toxicity, the waste water is guided to enter the return pipeline and flow back to the active microorganism generator to provide nutrient solution, and when the toxicity exceeds a preset value, the waste water is guided to enter the waste liquid pipeline;
and/or the presence of a gas in the gas,
the waste liquid pipeline is connected to the waste liquid pool;
and/or the presence of a gas in the gas,
the sewage treatment system also comprises a sewage pipeline, one end of the sewage pipeline is connected to the water inlet end and/or the water outlet end of the sewage treatment plant, and the other end of the sewage pipeline is connected to the mixing module or directly connected to the aeration tank;
and/or the presence of a gas in the gas,
the device also comprises an alarm module which is connected to the respiration rate tester and is used for alarming immediately when toxicity is detected;
and/or the presence of a gas in the gas,
the respiration rate tester also comprises a single dissolved oxygen sensor and a respiration module, wherein the single dissolved oxygen sensor is used for measuring the dissolved oxygen concentration of a sample in the respiration module, acquiring data in real time and calculating the respiration rate and the toxicity inhibition rate in real time;
and/or the presence of a gas in the gas,
the breathing chamber is in a pipeline shape;
and/or the presence of a gas in the gas,
the active microorganism generator adopts an active sludge process generator, an A/O process generator, an A2/O process generator, an SBR process generator or an oxidation ditch process generator;
and/or the presence of a gas in the gas,
the intelligent sampler is connected to the respiration rate and used for taking a certain amount of detected water to be reserved as a recording water sample and calibrating sampling time when the respiration rate instrument detects that the toxicity in the sewage reaches a critical value;
and/or the presence of a gas in the gas,
the respiratory rate determinator further comprises a toxicity calculation module.
The determination method of the online toxicity analysis system comprises the following steps:
(1) consumption of a first preset value within unit time of dissolved oxygen concentration when microorganisms in the activated sludge normally breathe is preset, and the respiration rate is a second preset value;
(2) toxic sewage enters a system to inhibit the activity of microorganisms, so that the respiratory rate is reduced;
(3) the consumption of dissolved oxygen is reduced, a preset value three is consumed in unit time, and the respiration rate is a preset value four;
(4) monitoring the sludge respiration rate;
(5) when the sludge respiration rate is reduced to a preset value, the system gives an early warning to prevent sewage from flowing into a biochemical treatment system of a sewage plant.
Further, the unit time is set to be 1min, the first preset value is set to be 3mg, the second preset value is set to be 3mg/min, the third preset value is set to be 0.5mg, and the fourth preset value is set to be 0.5 mg/min;
and/or the presence of a gas in the gas,
in the step (1), the activated sludge directly collects the real-time sludge of a sewage treatment plant for culture by adopting an activated microorganism culture system, is continuously input, and has the same or similar pH value, temperature, water sample and sludge;
and/or the presence of a gas in the gas,
in the step (4), a single dissolved oxygen sensor of a respiratory rate determinator is adopted to measure the dissolved oxygen concentration of a sample in a respiratory module, the collected real-time data is continuously and directly used for processing on line, and the respiratory rate and the toxicity inhibition rate are calculated in real time;
and/or the presence of a gas in the gas,
in the step (1), an active microorganism generator is adopted to simulate the growth process of microorganisms according to an on-site treatment process, so that the concentration of the microorganisms is highly similar to the population, and the impact degree of a toxic substance on the existing treatment process are detected;
and/or the presence of a gas in the gas,
in the step (5), the respiration rate determinator continuously detects the detected water sample, and when the respiration rate is rapidly reduced and is lower than a preset percentage, an alarm is triggered and corresponding action is executed;
and/or the presence of a gas in the gas,
the mixing module continuously and automatically fills with microbial sludge from the active microbial generator while introducing sewage and continuously aerating to achieve maximum respiratory rate; the analyzer continuously extracts the mixed sample from the mixing module and sends the mixed sample to the respiration rate measuring module to detect toxicity.
Compared with the prior art, the system continuously collects the inlet water of the urban wastewater treatment plant on line, mixes the inlet water with the activated sludge for testing and the externally added biodegradable carbon source, automatically measures the respiration rate of the mixed liquid, and identifies and evaluates the toxicity and inhibition degree of the inlet water to the activated sludge according to the change of the respiration rate or the specific respiration rate. The system can monitor the water inlet toxicity in real time in an online and high-frequency manner, truly reflects the inhibition of the water inlet on the activated sludge of the plant, has high automation degree, simple operation and friendly and visual operation interface, and can be applied to actual sewage treatment plants. The industrial computer inside the analyzer controls all operations and functions, and if a poison leaks into the effluent, a sudden decrease in the respiration rate is reflected. If the breathing rate decreases rapidly, below a certain percentage, an alarm will be triggered and corresponding action performed.
The system is different from similar imported products in the aspects that the system adopts continuous measurement, a water inlet pump is adopted in a continuous respiration rate measuring method, and samples are not taken at regular intervals like an intermittent respiration rate measuring method. The active microbe generator simulates the growth process of microbes according to the field (mainly sewage plant) treatment process, so that the concentration of the microbes is highly similar to the population, and the impact degree of the toxic substances on the existing treatment process are detected. (2) Because the active microorganism generator provides uninterrupted active bacteria source for the respiration rate instrument, when toxic substances impact a detection sample, the automatic system ensures that the active bacteria source can be independently processed, and the subsequent detection process cannot be influenced. (3) The online respiration rate instrument is continuous to the detected water sample, and if a poison is leaked into the sewage, the suddenly reduced respiration rate can be reflected. If the breathing rate decreases rapidly, below a certain percentage, an alarm will be triggered and corresponding action performed.
Drawings
FIG. 1 is a diagram of the trend of respiration rate
FIG. 2 is a view showing a process structure of activated sludge
FIG. 3 is a view showing the structure of the A/O process
FIG. 4 is A2Structure diagram of/O process
FIG. 5 is a diagram of the SBR process
FIG. 6 is a view showing the structure of the oxidation ditch process
FIG. 7 is a schematic diagram of an on-line respiration rate measuring instrument
FIG. 8 is a schematic view of a probe of a dissolved oxygen measuring apparatus
FIG. 9 is a graph showing the trend of the dissolved oxygen concentration
FIG. 10 is a design diagram of an intelligent sampler
FIG. 11 is an overview of an on-line toxicity analysis system
Detailed Description
The present invention will now be described in detail with reference to the drawings, which are illustrative of preferred embodiments of the invention.
Referring to FIG. 1, the dissolved oxygen concentration of microorganisms in the activated sludge consumed 3mg per unit time (1min) during normal respiration, so the respiration rate was 3 mg/min. When the toxic sewage enters the system, the activity of microorganisms is inhibited, the respiration rate is reduced, the consumption of dissolved oxygen is reduced, and 0.5mg is consumed in unit time, so the respiration rate at the moment is 0.5 mg/min. When the sludge respiration rate is reduced to a certain degree, the system gives an early warning to avoid the sewage from flowing into a biochemical treatment system of a sewage plant to cause irreversible damage to the sludge.
Referring to fig. 2, in the activated sludge process, the operating parameters of the activated sludge process are as follows:
1) BOD sludge load rate (NS): 0.2-0.4 kgBOD/(kgMLSS. d)
2) BOD volume load (NV): 0.3-0.8kgBOD/(m 3. d)
3) Mixed liquor suspended matter concentration (MLSS): 1.5-2.0g/L
4) Sludge age (ts): 2-4d
5) Gas-water ratio: 3-7
6) Aeration time (t): 6 to 8 hours
7) Reflux ratio: 20 to 30 percent
8) Sludge Volume Index (SVI): 60-120L/g
Referring to fig. 3, in the a/O process (anoxic-aerobic process), the operating parameters of the a/O process are as follows:
1) the ammonia nitrogen removal rate is 70 to 80 percent
2) The optimum pH value for nitrification is 8.0-8.4, and the optimum pH value for denitrification is 6.5-7.5
3) The total nitrogen concentration TN of the original sewage is less than 30mg/L
4) The dissolved oxygen control requires that the O section is more than 1 mg/L; the A section is less than 0.5mg/L
5) The sludge concentration is generally required to be more than 3000mg/L
6) Sludge reflux ratio: 30 to 100 percent
7) The sludge age should be above 15 days
Referring to FIG. 4, A2In the/O process (anaerobic-anoxic-aerobic process), the organic matter removal rate of the process is basically the same as that of a common activated sludge method, and the operation parameters of the common urban domestic sewage are as follows:
1) the BOD5 removal rate is 85-95 percent
2) The sludge load is generally 0.1-0.2kgBOD5/kgMLSS d
3) The total retention time is 6-12h, wherein the anaerobic zone is 0.5-1.5h, the anoxic zone is 0.5-1h, and the aerobic zone is 4-8h
4) MLSS is 3000-4000mg/L
5) The sludge reflux ratio is 25-100%.
6) The total nitrogen removal rate is 60-80 percent
7) The phosphorus removal rate is 50-75%, and the phosphorus content in the excess sludge is more than 2.5%
8) The sludge age is generally 5-25 days
Referring to fig. 5, in the SBR process, design parameters of the SBR-activated sludge method must be appropriately determined in consideration of regional characteristics of a treatment plant and design conditions (land area, maintenance management, treatment water quality index, etc.). The design parameters for facility design should be governed by the following values:
1) BOD sludge load (kg BOD/kg MLSS. d): 0.03-0.4
2)MLSS(mg/L)：1500-5000
3) Discharge ratio (1/m): 1/2-1/6
4) Safe height ∈ (cm) (minimum water depth above activated sludge interface): more than 50
Referring to fig. 6, in the oxidation ditch process, the hydraulic retention time of the oxidation ditch is long, the organic load is low, and the oxidation ditch process essentially belongs to a delayed aeration system. The main design parameters of the general oxidation ditch method are as follows:
1) hydraulic retention time: 10-40 hours
2) Sludge age: generally more than 20 days
3) Organic load: 0.05-0.15 kgBOD5/(kgMLSS.d)
4) Volume load: 0.2-0.4kgBOD 5/(m)3.d)
5) Concentration of activated sludge: 2000-6000 mg/l
6) Average flow velocity in the trench: 0.3-0.5 m/s
Referring to fig. 7, the online respiration rate measuring apparatus, a respiration rate measuring method, can be classified into a closed type and an open type according to whether the bioreactor is sealed or not. The closed measurement method is similar to that dissolved oxygen electrodes are respectively arranged at the inlet and the outlet of a breathing chamber, and the respiratory rate is obtained by dividing the measured dissolved oxygen difference value by the sludge retention time. The improved method only uses one dissolved oxygen electrode, and the sludge periodically flows reversely by controlling the two three-way electromagnetic valves, so that the dissolved oxygen concentration of the inlet and the outlet can be measured simultaneously. This greatly reduces the systematic error.
The two three-way electromagnetic valves are alternately switched on and off, and the inflow and the outflow change directions with h as a period. The period h needs to be determined according to the response time of the dissolved oxygen probe, and is generally about 60 s.
The breathing chamber is sealed, and the breathing chamber is designed into a pipeline shape, so that the mixing degree of new and old sewage is reduced, sludge precipitation is reduced, and the measurement accuracy is improved. Measuring the flow rate q of the mixed solution in unit of L/min; and respiratory chamber volume V, in L;
referring to fig. 8, the dissolved oxygen meter probe, which uses as high precision and high quality meter as possible to support long-term continuous measurement, is as close as possible to the respiratory chamber to reduce error, and is connected to a computer at the back end to calculate respiration rate and other data. In the way, A is a probe, B is a dissolved oxygen analyzer, and C is a sampling computer.
Referring to fig. 9, in the calculation process of the respiration rate, since the dissolved oxygen concentration at the inlet and the outlet is alternately measured, the measured change trend of the dissolved oxygen concentration is as follows: and h is a measurement period, and the concentration of the dissolved oxygen at the inlet and the outlet can be measured once within h. The extremely high value is a stable value of the dissolved oxygen concentration at the inlet, and the extremely low value is a stable value of the dissolved oxygen concentration of the mixed liquid in the outlet breathing chamber. Because the calculation formula is complex and is not described herein, the final calculation breathing rate formula is:
rk＝(a(Ck+1+Ck-1)-(a+2/h)(Ck+2+Ck)/2-(a-2/h)(CK-2+Ck)/2)/2
if the dissolved oxygen concentration in the system to be tested does not vary much, the same formula as the original continuous method can be used, i.e.:
rk＝α((Ck+1+Ck-1)/2-Ck)
referring to fig. 10, intelligent sampler comprises sampling tube, support, stays a kind bottle and the inside distribution board for use with the cooperation of respiratory rate appearance, when the respiratory rate appearance detected the toxicity in the sewage and reached the warning line, intelligent sampler will be in step got a certain amount of water that will be detected and is stayed as the record water sample, marks the sample time simultaneously, in order to prepare for manual detection.
Referring to fig. 11, the active microorganism generator is a complex microorganism culture reaction storage device, which is composed of a water collecting tank, an anoxic tank, an aeration tank and a secondary sedimentation tank (different process structures are different), and can ensure that microorganisms are in an optimal state for a long time and provide energy sources for continuously measuring the microorganisms. The measured waste water can flow back to the microbial generator to provide nutrient solution if the waste water does not contain toxicity, and flow into a waste liquid pool to wait for further treatment if the waste water is too toxic.
The mixing module is constantly automatically filled with microbial sludge from the active microbial generator while introducing sewage and continuously aerating to achieve maximum respiration rate. The analyzer continuously extracts the mixed sample from the mixing module and sends the mixed sample to the respiration rate measuring module to detect toxicity. The aerobic rate and the respiratory rate of the activated sludge in the aeration tank are related to the vitality of the activated sludge, so that the toxic effect is reflected. If the respiration rate is only related to toxic compounds in the wastewater under the process conditions, a decrease in the respiration rate is indicative of the effect of the toxic substance. The analyzer can simultaneously measure and display: dissolved oxygen concentration (front), dissolved oxygen concentration (back), respiration rate, toxicity inhibition%.
The intelligent sampler is also controlled by a PLC in the respiratory rate instrument, and the respiratory rate instrument immediately samples when detecting that the toxicity reaches a critical value.
The utility model belongs to the technical field of sewage automatic processing and a toxicity on-line monitoring system who utilizes microorganism respiration rate to change realization sewage is disclosed, include: the system comprises an active microorganism culture system, a mixing module, a respiration rate measurement module, a toxicity calculation module and an intelligent sampling module. The active microorganism culture system directly collects the real-time sludge of the sewage treatment plant for culture, continuously inputs the sludge to keep a fresh state, and has the same pH value, temperature, water sample and sludge. The respiration rate determination module adopts a unique single dissolved oxygen sensor to measure the dissolved oxygen concentration of a sample in the respiration module, and does not use double dissolved oxygen probes to avoid measurement errors caused by performance difference between the probes. The respiration rate measuring module can continuously and directly utilize the collected real-time data for processing on line, and calculate the respiration rate and the toxicity inhibition rate in real time without any retention time. The utility model discloses settle in sewage treatment plant inlet end, once detect out toxicity and report to the police at once, avoid causing the impact to sewage treatment plant treatment process. The utility model discloses need not to use reagent, the maintenance volume is little, can realize unmanned supervision.
Claims (6)
1. An on-line toxicity analysis system, which is characterized by comprising an active microorganism generator, a mixing module and a respiration rate tester, wherein,
the active microbial generator is used for culturing microbial substances for measurement, is connected to the mixing module and conveys the microbial substances for measurement to the mixing module;
the mixing module is used for introducing microbial substances for measurement from the active microbial generator and introducing sewage to form a mixed sample, and the mixed sample is connected to the respiration rate tester and is conveyed to the respiration rate tester;
the respiration rate tester is used for introducing the mixed sample from the mixing module and detecting the toxicity of the mixed sample;
the intelligent sampler is connected to a pipeline for introducing sewage of the mixing module and is used for reserving sewage with high toxicity;
the intelligent sampler is connected to the respiration rate tester and is used for taking a certain amount of detected water to be reserved as a recording water sample and calibrating sampling time when the respiration rate tester detects that the toxicity in the sewage reaches a critical value;
the respiration rate tester also comprises a single dissolved oxygen sensor and a respiration module, wherein the single dissolved oxygen sensor is used for measuring the dissolved oxygen concentration of a sample in the respiration module, acquiring data in real time and calculating the respiration rate and the toxicity inhibition rate in real time;
wherein,
the online respiration rate tester comprises a respiration chamber, an inlet, an outlet, a metering pump, a dissolved oxygen electrode/dissolved oxygen tester and a first three-way electromagnetic valve and a second three-way electromagnetic valve, wherein the inlet is connected to the metering pump, the metering pump is respectively connected to the first three-way electromagnetic valve and the second three-way electromagnetic valve, the first three-way electromagnetic valve is connected to the upper end of the respiration chamber, the second three-way electromagnetic valve is connected to the lower end of the respiration chamber, and the first three-way electromagnetic valve and the second three-way electromagnetic valve are both connected;
or,
the online respiration rate tester comprises a respiration chamber, an inlet, an outlet, a metering pump, a dissolved oxygen electrode/dissolved oxygen tester and a first three-way electric valve and a second three-way electric valve, wherein the inlet is connected to the metering pump, the metering pump is respectively connected to the first three-way electric valve and the second three-way electric valve, the first three-way electric valve is connected to the upper end of the respiration chamber, the second three-way electric valve is connected to the lower end of the respiration chamber, and the first three-way electric valve and the second three-way electric valve are both connected;
or,
the online respiration rate tester comprises a respiration chamber, an inlet, an outlet, a metering pump, a dissolved oxygen electrode/dissolved oxygen tester, a first three-way pneumatic valve and a second three-way pneumatic valve, wherein the inlet is connected to the metering pump, the metering pump is respectively connected to the first three-way pneumatic valve and the second three-way pneumatic valve, the first three-way pneumatic valve is connected to the upper end of the respiration chamber, the second three-way pneumatic valve is connected to the lower end of the respiration chamber, and the first three-way pneumatic valve and the second three-way pneumatic valve are both connected to the outlet.
2. The on-line toxicity analysis system of claim 1, wherein the mixing module comprises an aerated tank,
which is used to contain the microbiological material for measurement as well as the sewage and to continue aeration to achieve the maximum respiration rate.
3. The on-line toxicity analysis system of claim 2, wherein the dissolved oxygen electrode is disposed at the inlet and/or outlet of the breathing chamber.
4. The on-line toxicity analysis system of claim 3, wherein the dissolved oxygen analyzer comprises a sampling computer, a dissolved oxygen analyzer, and a probe for detecting near the respiratory chamber, connected to the dissolved oxygen analyzer, connected to the sampling computer for calculating the respiration rate.
5. The on-line toxicity analysis system of claim 4, further comprising a mixing module microbiological material inlet line, and/or a mixing module sewage inlet line, and/or a mixing module mixed sample outlet line, and/or an overflow line, and/or a respirometer outlet line, wherein,
active microbial generator is connected to the mixing module through mixing module microbiological matter inlet pipe, sewage passes through mixing module sewage inlet pipe and gets into mixing module, mixing module mixes appearance outlet pipe through mixing module and is connected to the respiratory rate apparatus, the overflow pipe is the overflow pipe of mixing module aeration jar, respiratory rate apparatus outlet pipe is the outlet conduit of respiratory rate apparatus.
6. The on-line toxicity analysis system according to claim 5, wherein it is an on-line toxicity analysis system based on the respiration rate of activated sludge, said respiration rate meter is an on-line respiration rate meter, and said microbial substance for measurement is microbial sludge;
and/or the presence of a gas in the gas,
the device also comprises a return pipeline and/or a waste liquid pipeline, wherein the outlet pipeline of the overflow pipeline and/or the respiration rate measuring instrument is connected to the return pipeline and/or the waste liquid pipeline, and when the detection result shows that the waste water measured in the outlet pipeline of the overflow pipeline and/or the respiration rate measuring instrument does not contain toxicity, the waste water is guided to enter the return pipeline and flow back to the active microorganism generator to provide nutrient solution, and when the toxicity exceeds a preset value, the waste water is guided to enter the waste liquid pipeline;
and/or the presence of a gas in the gas,
the waste liquid pipeline is connected to the waste liquid pool;
and/or the presence of a gas in the gas,
the sewage treatment system also comprises a sewage pipeline, one end of the sewage pipeline is connected to the water inlet end and/or the water outlet end of the sewage treatment plant, and the other end of the sewage pipeline is connected to the mixing module or directly connected to the aeration tank;
and/or the presence of a gas in the gas,
the device also comprises an alarm module which is connected to the respiration rate tester and is used for alarming immediately when toxicity is detected;
and/or the presence of a gas in the gas,
the breathing chamber is in a pipeline shape;
and/or the presence of a gas in the gas,
the active microorganism generator adopts an active sludge process generator, an A/O process generator, an A2/O process generator, an SBR process generator or an oxidation ditch process generator;
and/or the presence of a gas in the gas,
the respiratory rate determinator further comprises a toxicity calculation module.
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| CN201720961318.5U CN207908494U (en) | 2017-08-03 | 2017-08-03 | A kind of online oxicity analysis system |
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