A petrochemical enterprise total wastewater toxicity monitoring equipment

Abstract

The utility model discloses a kind of petrochemical enterprise total drainage toxicity monitoring equipment, belong to industrial wastewater treatment and online monitoring technical field;The utility model includes pre-reaction simulation device, sludge activity detection system, and pre-reaction simulation device outer wall is equipped with water inlet, sludge inlet and sludge outlet.The utility model has realized the online monitoring of sewage toxicity, without purchasing strain, cultivation recovery, reduce the monitoring cost of sewage biological toxicity detection, and improve the detection accuracy of sewage comprehensive biological toxicity;Biochemical pond sludge simulation reaction is used, based on the inhibition of microbial activity to early warning water quality toxicity, it is a kind of direct determination comprehensive toxicity in sewage method, high accuracy.The utility model is applied to wastewater treatment system of chemical industry etc., and the comprehensive toxicity effect of pollutant in sewage can be detected online.

Description

Technical Field

[0001] This utility model belongs to the field of industrial wastewater treatment and online monitoring technology, specifically relating to a total toxicity monitoring device for petrochemical enterprises. Background Technology

[0002] The rapid development of modern industry has led to a continuous increase in the discharge of industrial wastewater. Most petrochemical wastewater contains biotoxic substances, which can severely impact wastewater biological treatment systems and the microorganisms in the ecosystem after being discharged into rivers. Activated sludge, as the main component in the secondary biological treatment process of wastewater treatment plants, has its biological activity closely related to the effluent quality. During daily operation, if trace amounts of toxic or harmful substances are introduced into the influent, causing fluctuations in water quality, the biological activity of the activated sludge will be damaged, resulting in effluent quality failing to meet standards. This could even lead to the collapse of the biological treatment system, seriously affecting the normal operation of the wastewater treatment plant. Therefore, the detection and early warning of wastewater biotoxicity is an indispensable part of water environment quality monitoring.

[0003] Biological and chemical methods are the two main methods for detecting biotoxicity in water quality: Chemical detection methods include connecting online instruments for COD, ammonia nitrogen, total nitrogen, total phosphorus, and pH at the influent, or conducting offline laboratory physicochemical analysis after manual sampling. Even if all types of pollutants can be measured, predicting the true toxicity of wastewater based solely on concentration data of different pollutants is extremely difficult due to the combined effects of antagonistic, additive, and synergistic interactions between them. Therefore, chemical analysis data of water bodies cannot reflect the overall quality of the water or the impact of pollutants on various organisms and the ecological environment.

[0004] Common biotoxicity detection methods include: acute toxicity detection of luminescent bacteria, algal cell growth inhibition detection, acute toxicity detection of daphnia and zebrafish juveniles, community-level toxicity tests, and SOS / umu genotoxicity detection. Because the acute toxicity detection of luminescent bacteria has the advantages of being rapid, economical, and yielding reliable results in a smaller experimental space compared to other biotoxicity detection methods, it is the primary method used in existing toxicity detection equipment. However, using model organisms to determine biotoxicity presents several problems: model organisms have not been acclimatized to daily influent water and may react significantly to fluctuations in influent water quality within the normal range, leading to misjudgments by operators and affecting the normal operation of wastewater treatment plants. Furthermore, model organisms have demanding survival conditions and short activity periods, making them difficult to apply to continuous biotoxicity monitoring of domestic wastewater. Additionally, model organisms generally need to be purchased externally, requiring specialized culture media for resuscitation, which increases the economic cost of wastewater treatment plant operation. Current mainstream detection methods for industrial wastewater have significant limitations. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a total wastewater toxicity monitoring device for petrochemical enterprises. The device primarily comprises a pre-reaction simulation unit and a sludge activity detection system. Wastewater and activated sludge are mixed and cultured in the pre-reaction simulation unit, and the sludge activity detection system is used to measure the specific oxygen consumption rate of the sludge online. The toxicity of the wastewater is then determined based on the metabolic activity of the microorganisms in the sludge. This invention enables online monitoring of wastewater toxicity, reduces the monitoring cost of wastewater biotoxicity testing, and improves the accuracy of comprehensive wastewater biotoxicity detection.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A toxicity monitoring device for total wastewater from a petrochemical enterprise includes: a pre-reaction simulation device, a sludge activity detection system, a main inlet water pipeline, a sludge inlet pipeline, a sludge outlet pipeline, and a sludge detection inlet pipeline; the sludge activity detection system is connected to the pre-reaction simulation device via the sludge detection inlet pipeline; wherein... The pre-reaction simulation device is a closed, corrosion-resistant container with an inlet, a sludge inlet, and a sludge outlet on its outer wall, located at different positions on the side wall of the device. Inside, there is a stirrer to ensure that the water to be tested is thoroughly mixed with the activated sludge. At the bottom, there is an aeration pipe to supply oxygen to the inside of the container. Inlet: Located on the side wall of the device near the top, used to connect the wastewater to be tested through the main water supply pipe; Sludge inlet: Located in the middle of the side wall of the device, it is used to connect activated sludge from the biochemical system through the sludge sampling pipeline; Sludge outlet: Located at the bottom of the side wall of the device, it is connected to the sludge outlet pipeline and the sludge testing and sampling pipeline respectively through a tee fitting.

[0007] Preferably, one end of the main water inlet pipeline is connected to the petrochemical enterprise's main wastewater pipeline, and the other end is connected to the inlet of the pre-reaction simulation device. The pipeline is equipped with an inlet solenoid valve. One end of the sludge testing sampling pipeline is connected to the sludge storage tank of the biochemical system, and the other end is connected to the sludge inlet of the pre-reaction simulation device. The pipeline is equipped with a sludge sampling solenoid valve and a metering pump. The sludge outlet pipe is connected to one interface of the tee fitting to discharge the remaining sludge into the sludge recovery container; The sludge testing sample inlet pipeline is connected to another interface of the tee fitting to transport the reacted sludge to the sludge activity testing system. The pipeline is equipped with a testing sample inlet solenoid valve and a metering pump.

[0008] Preferably, the main water inlet pipe is made of high-pressure resistant rubber hose, and the inlet is equipped with a filter screen to intercept large particulate impurities in the sewage.

[0009] Preferably, the solenoid valves and metering pumps on the sludge outlet pipeline and the sludge testing inlet pipeline are all remotely controlled by the control system, enabling independent control of opening and closing and flow regulation.

[0010] Preferably, the agitator is a ribbon agitator, including a motor, a stirring shaft, and a spiral ribbon blade; the motor is located at the top of the device and is connected to the stirring shaft that extends vertically into the device via a coupling, and the spiral ribbon blade is installed on the stirring shaft.

[0011] Preferably, the sludge activity detection system includes an online microbial activity detector, a pH meter, a COD meter, a conductivity meter, and a data processing unit; wherein, The online microbial activity detector is connected to the pre-reaction simulation device via a sludge testing and sampling pipeline. It includes an active microbial biomass detection module and a dissolved oxygen content detection module; it is used to determine the amount of active microorganisms and the specific oxygen consumption rate. pH meter is used to monitor the acidity and alkalinity of wastewater and sludge in the pre-reaction simulation device or entering the detection system in real time. COD analyzers are used to measure the amount of oxygen consumed when organic pollutants in water are oxidized by chemical oxidants. A conductivity meter is used to measure the conductivity of a water sample. The data processing unit is used to receive the detection signal from the online microbial activity detector, calculate the amount of active microorganisms and the specific oxygen consumption rate data from the detection signal, and transmit them to the biochemical intelligent control system in real time via industrial Ethernet.

[0012] Preferably, the online microbial activity detector is equipped with an ultrasonic cleaning module for cleaning the detection probe against contamination. The ultrasonic cleaning module can achieve self-cleaning of the probe using high-frequency ultrasonic waves without the use of water or air.

[0013] Preferably, the pre-reaction simulation device is made of stainless steel and the inner wall is smoothed to reduce water flow resistance and sludge adhesion.

[0014] The beneficial technical effects of this utility model are as follows: This invention provides a total wastewater toxicity monitoring device for petrochemical enterprises, including a pre-reaction simulation device and a sludge activity detection system. The pre-reaction simulation device has an inlet, a sludge inlet, and a sludge outlet on its outer wall. Water from the main pipeline is supplied to the total wastewater toxicity detection device through the inlet. Activated sludge from the biochemical system enters through the sludge inlet, and the sludge outlet is connected to the sludge outlet and the sludge activity detection system via a T-fitting. The pre-reaction simulation device mixes and cultivates wastewater and activated sludge, and uses the sludge activity detection system to measure wastewater toxicity online. The sludge activity detection system is connected to the biochemical process intelligent control system to transmit wastewater toxicity data, enabling the biochemical intelligent control system to determine whether to trigger an alarm and adjust the biochemical process operating parameters based on the toxicity data.

[0015] This invention enables online monitoring of wastewater toxicity, eliminating the need for purchasing and cultivating bacterial strains, thus reducing the monitoring cost of wastewater biotoxicity testing and improving the accuracy of comprehensive wastewater biotoxicity detection. It employs a biochemical tank sludge-simulated reaction, using the inhibition of microbial activity to predict water toxicity, providing a direct and highly accurate method for determining the comprehensive toxicity of wastewater. This invention can be applied to wastewater treatment systems in industries such as chemical engineering, enabling online detection of the comprehensive toxic effects of pollutants in wastewater. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the monitoring equipment of this utility model. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: This invention aims to overcome the shortcomings of existing technologies and focuses on solving key problems in industrial wastewater toxicity monitoring: First, chemical detection methods, including online instruments for COD, ammonia nitrogen, total nitrogen, total phosphorus, and pH connected to the influent end, cannot accurately reflect the true toxicity level of wastewater on sludge microorganisms; second, in biological detection methods, the unaccurate response of untrained model organisms fluctuates greatly, affecting the interpretation of results; and third, the survival conditions of model organisms used in biological detection methods are harsh, their activity is short-lived, their cost is high, and their maintenance is difficult.

[0018] This invention aims to achieve rapid, accurate, and low-maintenance continuous monitoring of wastewater toxicity.

[0019] like Figure 1 As shown, a toxicity monitoring device for total wastewater from a petrochemical enterprise includes a pre-reaction simulation device, a sludge activity detection system, a main water inlet pipeline, a sludge inlet pipeline, a sludge outlet pipeline, and a sludge testing inlet pipeline. The sludge activity detection system is connected to the pre-reaction simulation device via the sludge testing inlet pipeline.

[0020] The pre-reaction simulation device is a closed container made of corrosion-resistant stainless steel with a smooth inner wall to reduce water flow resistance and sludge adhesion. Inside the device is a ribbon agitator, consisting of a motor, a mixing shaft, and impellers. The motor is mounted at the top of the device and connected to the mixing shaft via a coupling. The mixing shaft extends vertically into the device, and spiral ribbon impellers are mounted on it. The agitator speed is adjustable to ensure thorough mixing of the water and activated sludge. The outer wall of the device has an inlet, a sludge inlet, and a sludge outlet, each with a flange for easy connection to external pipelines. Aeration ducts are installed at the bottom of the device.

[0021] Inlet: Located on the side wall of the device near the top, it is connected to the main sewage pipe of the petrochemical enterprise through a high-pressure resistant rubber hose. A filter screen is installed inside the inlet to intercept larger particulate impurities in the sewage and protect the internal structure of the device.

[0022] Sludge inlet: Located in the middle of the side wall of the device, it is connected to the sludge storage tank of the biological system through a pipe. The pipe is equipped with an electromagnetic valve, which can be remotely controlled by the control system to precisely adjust the inflow of activated sludge.

[0023] Sludge outlet: Located at the bottom of the side wall of the unit, a tee fitting is installed, with a solenoid valve installed on each interface pipe, which can be independently controlled to open and close. One interface of the tee fitting is a straight outlet for discharging sludge into the sludge recovery container, preventing it from flowing back to the sludge tank of the biological system; the second interface is connected to the sludge activity detection system through a pipe, which is equipped with a metering pump to accurately control the amount of reacted sludge pumped into the sludge activity detection system.

[0024] The sludge activity detection system includes an online microbial activity detector and a data processing unit. The online microbial activity detector is connected to the pre-reaction simulation device via a sludge sampling pipeline. The pre-reacted water-containing sludge is transported from the pipeline to the online microbial activity detector for biological activity detection.

[0025] The sludge activity detection system includes an online microbial activity detector, a pH meter, a COD meter, a conductivity meter, and a data processing unit. The sensors of the online microbial activity detector are connected to the pre-reaction simulation device through a sludge sampling pipeline. The pre-reacted water-containing sludge is transported from the pipeline to the online microbial activity detector for biotoxicity testing.

[0026] The online microbial activity detector is equipped with an ultrasonic module, which can prevent the probe from becoming contaminated and achieve high-precision measurement through ultrasonic action without the need for water and air.

[0027] The data processing unit is connected to the biochemical process intelligent control system via industrial Ethernet. It calculates the amount of active microorganisms and specific oxygen consumption rate in the sludge based on sensor detection signals and transmits the data to the biochemical intelligent control system in real time.

[0028] In a specific embodiment, during implementation, wastewater from the main drainage pipe enters the pre-reaction simulation device of the monitoring equipment via the main water inlet pipe. First, the operator issues a command through the control system to open the solenoid valve at the inlet. Under the pressure of the petrochemical plant's main wastewater pipe, the wastewater rapidly flows into the pre-reaction simulation device along the high-pressure resistant rubber hose. During this process, the filter screen inside the inlet continuously functions to prevent large particles of impurities from entering the device. Simultaneously, the control system, based on pre-set sludge quantity parameters, controls the opening and closing of the solenoid valve at the sludge inlet and the operation of the metering pump, delivering a certain volume of activated biochemical sludge from the sludge storage tank of the biochemical system to the pre-reaction simulation device through the sludge sampling pipeline.

[0029] After the wastewater and activated sludge are transported, the control system immediately closes the corresponding valves at the inlet and sludge inlet to prevent material leakage and the entry of external impurities. Then, the agitator and aeration ducts are started. The agitator begins operating at the preset speed, and the spiral-shaped blades, driven by the agitator shaft, thoroughly mix the water to be tested and the activated sludge within the pre-reaction simulation device. During the mixing process, the axial and radial water flow generated by the blades evenly disperses the activated sludge in the wastewater, promoting contact and reaction between the two. Simultaneously, air is introduced into the device through the aeration ducts. The air enters the wastewater and sludge mixture in the form of microbubbles through evenly distributed small holes in the aeration ducts, providing sufficient oxygen to the microorganisms in the activated sludge, maintaining their normal metabolic activities, and thus promoting the biochemical reaction between the wastewater and activated sludge.

[0030] After the preset reaction time is reached, the reaction is complete. At this point, the control system opens the solenoid valve on the sludge sampling pipeline and starts the metering pump connecting the sludge outlet and the sludge activity detection system. The metering pump delivers a quantitative amount of the reacted sludge to the biological activity detection system according to the set flow rate. After the sludge delivery is completed, the control system closes the solenoid valve to prevent any remaining sludge from flowing into the detection system. The online microbial activity detector then begins to perform online detection of pH, COD, conductivity, active microbial mass, and specific oxygen consumption rate on the sludge sample. The active microbial mass detection module uses the ATP assay to determine the active microbial mass; the dissolved oxygen content detection module monitors the dissolved oxygen concentration in the sludge sample in real time using a polarographic dissolved oxygen electrode sensor and calculates the specific oxygen consumption rate based on the detection data.

[0031] While the online microbial activity detector is testing the sludge sample, the control system opens the solenoid valve at the sludge outlet of the pre-reaction simulation device, discharging all remaining sludge from the pre-reaction device into the sludge recovery container. To ensure complete sludge discharge, the agitator can be activated briefly during the discharge process to ensure that sludge adhering to the inner wall and bottom of the device is also discharged smoothly. After sludge discharge is complete, the agitator and aeration device are turned off, and the operation of the pre-reaction simulation device is stopped.

[0032] After detection, the online microbial activity detector transmits the detected signals to the data processing unit. The high-performance data processing chip and complex algorithms within the data processing unit rapidly process and analyze the signals, calculating the amount of active microorganisms and specific oxygen consumption rate in the sludge. After calculation, the data processing unit transmits the data in real-time to the intelligent biochemical process control system via industrial Ethernet, following a reliable communication protocol. Upon receiving the data, the intelligent biochemical control system assesses the biotoxicity of the wastewater based on preset judgment criteria and models. If high toxicity is detected, the system immediately issues a warning signal and automatically takes a series of countermeasures, such as increasing aeration to provide more oxygen to the microorganisms and enhance their ability to decompose toxic substances; increasing the sludge return ratio to supplement more activated sludge for the reaction, reducing the concentration of toxic substances in the wastewater. If low toxicity is detected, the current process parameters are maintained or appropriately optimized based on actual conditions. If excessive toxicity is detected, the system immediately issues a warning signal and stops discharging wastewater into the biochemical system to prevent system collapse.

[0033] Simultaneously, the ultrasonic cleaning module in the online microbial activity detector is activated. This module generates high-frequency ultrasonic waves to clean the surface of the sensor probe. The vibration of the high-frequency ultrasound effectively removes contaminants such as sludge particles and microbial metabolites adhering to the probe surface, ensuring its cleanliness and preparing it for the next measurement. During the cleaning process, the ultrasonic module's operating parameters, such as ultrasonic frequency, power, and cleaning time, are automatically adjusted according to the degree of probe contamination to achieve optimal cleaning results.

[0034] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A toxicity monitoring device for total wastewater from a petrochemical enterprise, characterized in that, include: Pre-reaction simulation device, sludge activity detection system, main water inlet pipeline, sludge inlet pipeline, sludge outlet pipeline, and sludge detection inlet pipeline; The sludge activity detection system is connected to the pre-reaction simulation device via a sludge detection inlet pipeline; among which, The pre-reaction simulation device is a closed, corrosion-resistant container with an inlet, a sludge inlet, and a sludge outlet on its outer wall, located at different positions on the side wall of the device. Inside, there is a stirrer to ensure that the water to be tested is thoroughly mixed with the activated sludge. At the bottom, there is an aeration pipe to supply oxygen to the inside of the container. Inlet: Located on the side wall of the device near the top, used to connect the wastewater to be tested through the main water supply pipe; Sludge inlet: Located in the middle of the side wall of the device, it is used to connect activated sludge from the biochemical system through the sludge sampling pipeline; Sludge outlet: Located at the bottom of the side wall of the device, it is connected to the sludge outlet pipeline and the sludge testing and sampling pipeline respectively through a tee fitting.

2. The petrochemical enterprise total wastewater toxicity monitoring equipment according to claim 1, characterized in that, One end of the main water supply pipeline is connected to the main sewage pipeline of the petrochemical enterprise, and the other end is connected to the inlet of the pre-reaction simulation device. An inlet solenoid valve is installed on this pipeline. One end of the sludge testing sampling pipeline is connected to the sludge storage tank of the biochemical system, and the other end is connected to the sludge inlet of the pre-reaction simulation device. The pipeline is equipped with a sludge sampling solenoid valve and a metering pump. The sludge outlet pipe is connected to one interface of the tee fitting to discharge the remaining sludge into the sludge recovery container; The sludge testing sample inlet pipeline is connected to another interface of the tee fitting to transport the reacted sludge to the sludge activity testing system. The pipeline is equipped with a testing sample inlet solenoid valve and a metering pump.

3. The petrochemical enterprise total wastewater toxicity monitoring equipment according to claim 2, characterized in that, The main water inlet pipe uses a high-pressure resistant rubber hose, and the inlet is equipped with a filter screen to intercept large particulate impurities in the sewage.

4. The petrochemical enterprise total wastewater toxicity monitoring equipment according to claim 2, characterized in that, The solenoid valves and metering pumps on the sludge outlet pipeline and the sludge testing inlet pipeline are all remotely controlled by the control system, which can independently control their opening and closing and flow rate adjustment.

5. The petrochemical enterprise total wastewater toxicity monitoring equipment according to claim 1, characterized in that, The agitator is a ribbon agitator, which includes a motor, a stirring shaft and a spiral ribbon blade; the motor is located at the top of the device and is connected to the stirring shaft that extends vertically into the device through a coupling, and the spiral ribbon blade is installed on the stirring shaft.

6. The petrochemical enterprise total wastewater toxicity monitoring equipment according to claim 1, characterized in that, The sludge activity detection system includes an online microbial activity detector, a pH meter, a COD meter, a conductivity meter, and a data processing unit; wherein, The online microbial activity detector is connected to the pre-reaction simulation device via a sludge testing and sampling pipeline. It includes an active microbial biomass detection module and a dissolved oxygen content detection module; it is used to determine the amount of active microorganisms and the specific oxygen consumption rate. pH meter is used to monitor the acidity and alkalinity of wastewater and sludge in the pre-reaction simulation device or entering the detection system in real time. COD analyzers are used to measure the amount of oxygen consumed when organic pollutants in water are oxidized by chemical oxidants. A conductivity meter is used to measure the conductivity of a water sample. The data processing unit is used to receive the detection signal from the online microbial activity detector, calculate the amount of active microorganisms and the specific oxygen consumption rate data from the detection signal, and transmit them to the biochemical intelligent control system in real time via industrial Ethernet.

7. The petrochemical enterprise total wastewater toxicity monitoring equipment according to claim 1, characterized in that, The online microbial activity detector is equipped with an ultrasonic cleaning module for cleaning the detection probe to prevent contamination. The ultrasonic cleaning module can achieve self-cleaning of the probe through high-frequency ultrasonic waves without the use of water and air.

8. The petrochemical enterprise total wastewater toxicity monitoring equipment according to claim 1, characterized in that, The pre-reaction simulation device is made of stainless steel, and the inner wall is smoothed to reduce water flow resistance and sludge adhesion.

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