A multi-gas parameter detection device and detection method for sewage treatment

Abstract

The invention discloses a multi-gas parameter detection device and method for sewage treatment, comprising a gas analyzer and an OTE operation module; the gas analyzer comprises a filter chamber, a heating chamber, a parameter detection chamber and a sampling pump respectively connected to a control system; the filter chamber comprises an air inlet, a sample gas inlet, a channel solenoid valve, a cavity and a filter screen; the filter chamber forms a vacuum through the sampling pump, opens the channel solenoid valve, sucks in the air or the sample gas escaping from the biochemical pool, and introduces the gas into the heating chamber through the filter screen; the heating chamber comprises a heating resistor and a one-way damping channel; the gas passes through the heating chamber and then enters the parameter detection chamber; the parameter detection chamber comprises an oxygen content detection sensor, a carbon dioxide content detection sensor, a temperature and humidity detection sensor, a gas pressure sensor and a flow sensor; the invention collects and analyzes the gas escaping from the biochemical pool, gives OTE parameters, and improves the aeration efficiency through the evaluation of OTE to achieve energy saving effect.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a sewage treatment multi-gas parameter detection device and a detection method. Background Art

[0002] At present, the monitoring of the working conditions of sewage treatment systems mostly adopts relatively single detectors of various types. Most detectors can only intuitively measure the saturation concentration of dissolved oxygen in the sewage pool, but cannot know whether the current aeration volume is appropriate. There is a large lag in adjusting the aeration equivalent, which makes the sewage treatment plant inefficient and wastes energy. Summary of the invention

[0003] The invention provides a sewage treatment multi-gas parameter detection device and detection method, which can solve the above technical problems.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A sewage treatment multi-gas parameter detection device, comprising a gas analyzer and an OTE operation module;

[0006] The gas analyzer comprises a filtering chamber, a heating chamber, a parameter detection chamber and a sampling pump which are respectively connected to the control system;

[0007] The filter chamber comprises an air inlet, a sample gas inlet, a channel solenoid valve, a cavity and a filter screen; the air inlet and the sample gas inlet are respectively provided with an on-off solenoid valve, and the solenoid valve controls the air inlet selection, so that the air and the sample gas enter the filter chamber at different times;

[0008] The filter chamber forms a vacuum through the sampling pump, opens the channel solenoid valve, sucks in the air or sample gas escaping from the biochemical pool, and the gas is introduced into the heating chamber through the filter screen;

[0009] The heating chamber includes a heating resistor and a one-way damping channel; the gas passes through the heating chamber and then to the parameter detection chamber;

[0010] The parameter detection chamber includes an oxygen content detection sensor, a carbon dioxide content detection sensor, a temperature and humidity detection sensor, a gas pressure sensor, and a flow sensor;

[0011] The control system is used to control the pump and valve actions of the entire gas analyzer, the start and stop of the heating resistor, and the communication of each sensor;

[0012] The control system is communicatively connected with the OTE operation module.

[0013] Further, the filtering chamber is arranged at the front end, the heating chamber is arranged in the middle, the parameter detection chamber is arranged at the rear end, the sampling pump is arranged at the end, and the control system is embedded inside;

[0014] The filtering chamber, heating chamber, parameter detection chamber, sampling pump and control system are integrated into one by using epoxy resin waterproof electronic potting glue packaging and curing technology.

[0015] Furthermore, the filter screen is made of a stainless steel mesh, and the mesh size is between 50 and 100 meshes.

[0016] Furthermore, blocking plates are arranged in the one-way damping channel, and the blocking plates are cross-arranged at a certain angle to allow the gas to pass through the heating chamber in an orderly manner.

[0017] Furthermore, the parameter detection chamber is divided into an O2 parameter detection chamber and a CO2 parameter detection chamber. The O2 parameter detection chamber is provided with a temperature and humidity detection sensor, a gas pressure sensor, an O2 content detection sensor, a flow sensor and an air outlet; the CO2 parameter detection chamber is provided with a temperature and humidity detection sensor, a gas pressure sensor, an O2 content detection sensor, a flow sensor and an air outlet.

[0018] Further, the OTE operation module includes a touch screen, which is used to display the data obtained and calculated by the device, the operation and fault status of the device, and display historical data and curves;

[0019] At the same time, the parameters required for the operation of the device can be set.

[0020] Furthermore, a cloud platform is also included, so the cloud platform is communicatively connected with the OTE computing module;

[0021] The cloud platform includes a front-end display module and a back-end processing module, and is provided with a remote access platform for big data analysis.

[0022] On the other hand, the present invention also discloses a method for detecting multiple gas parameters in sewage treatment, based on the above-mentioned multiple gas parameter detection device for sewage treatment, comprising the following steps:

[0023] First, open the air inlet solenoid valve, and draw air through the sampling pump to allow air to enter the filter chamber. After filtering out impurities, the gas enters the heating chamber. Under the control of the control system, the gas is heated to a suitable temperature and humidity. Then, it enters the O2 content parameter detection chamber and the CO2 content parameter detection chamber through the one-way damping channel respectively. In the parameter detection chamber, the O2 content parameter, CO2 content parameter and temperature and humidity parameters of the air are measured, and the measured data are screened, the deviation data are eliminated, and the remaining data are averaged. After that, close the air inlet solenoid valve, open the sample gas inlet solenoid valve, draw through the sampling pump, allow the sample gas to enter the filter chamber, filter out impurities, and then enter the heating chamber. Under the control of the control system, the sample gas is heated to a set temperature and humidity. Then, it enters the O2 content parameter detection chamber and the CO2 content parameter detection chamber through the one-way damping channel respectively. In the parameter detection chamber, the O2 content parameter, CO2 content parameter and temperature and humidity parameters of the sample gas are measured, and the measured data are screened, the deviation data are eliminated, and the remaining data are averaged.

[0024] Furthermore, the oxygen transfer efficiency calculation is performed in the OTE calculation module, and the calculation formula is as follows:

[0025]

[0026] in:

[0027] Ye = O2 content in the sample gas escaping from the water surface during the sewage aeration treatment process;

[0028] Yi = O2 content in the ambient air around the sewage treatment plant;

[0029] Ycde = CO2 content in the gas released from the water surface during the sewage aeration treatment process;

[0030] Ycdi = CO2 content in the ambient air around the sewage treatment plant;

[0031] Yrhe = humidity data of the gas escaping from the surface of the water body in the sewage aeration treatment process;

[0032] Yrhi = humidity data in the ambient air around the sewage treatment plant;

[0033] Yte = Temperature data of the gas escaping from the surface of the water body in the sewage aeration treatment process;

[0034] Yti = Temperature data of ambient air gas around the sewage treatment plant.

[0035] It can be seen from the above technical scheme that the present invention provides a performance detection device and detection method required for aeration in a sewage treatment process. Air or sample gas is sucked in by a sampling pump and sucked into a filter chamber in time periods. The filtered gas passes through a heating chamber and controls the temperature of a heating resistor to make the temperature and humidity of the air or sample gas reach certain requirements. Then the gas enters a parameter detection chamber. By controlling the speed of the sampling pump, the pressure and flow rate entering the parameter detection chamber are within the required range. At the same time, parameters such as O2 content, CO2 content, temperature and humidity are obtained through an O2 content detection sensor, a CO2 content detection sensor and a temperature and humidity detection sensor. After the control system obtains the above parameters, they are sent to the OTE operation module, and function operations are performed in the OTE operation module to obtain OTE.

[0036] The present invention provides a new detection device for sewage treatment process, which has high automation and is easy to operate. Specifically, after aeration, the biochemical pool in sewage treatment will release different gases. By collecting and detecting the released gases, the oxygen transfer efficiency in the aeration process is obtained through analysis and calculation, which provides a novel evaluation index for sewage treatment conditions. The present invention can collect and analyze the escaped gas from the biochemical pool, give the oxygen transfer efficiency (OTE) parameter, and improve the aeration efficiency through the evaluation of OTE to achieve energy saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a system configuration diagram of the present invention;

[0038] Figure 2 It is a structural diagram of a gas analyzer of the present invention;

[0039] Figure 3 It is a flow chart of the working principle of the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0041] Reference Figure 1 The sewage treatment multi-gas parameter detection device shown includes a gas analyzer 1, an OTE operation module 2 and a cloud platform 3. The gas analyzer 1 communicates with the OTE operation module 2 for data exchange, and the OTE operation module 2 communicates with the cloud platform 3 over the network.

[0042] Reference Figure 2As shown, the gas analyzer 1 comprises a filter chamber 11 at the front end of the device, a heating chamber 12 in the middle of the device, parameter detection chambers 13 and 14 at the rear end of the device, sampling pumps 15 and 16 at the end of the device, and a control system 17 embedded in the device. The above components are integrated by using epoxy resin waterproof electronic potting glue encapsulation and curing technology.

[0043] Reference Figure 2 As shown, the filter chamber 11 includes: an air inlet 111 and a sample gas inlet 112; the above inlets are respectively provided with on-off solenoid valves 113 and 114. The solenoid valves 113 and 114 control the air inlet selection, so that the air and the sample gas enter the filter chamber at different times.

[0044] A stainless steel filter screen 115 is arranged between the filter chamber 11 and the heating chamber 12. The stainless steel filter screen is composed of a stainless steel mesh with a mesh size between 50 and 100. The purpose is to prevent foreign matter and dust from entering the subsequent cavity, protect the sensor, and prevent the cavity from being blocked.

[0045] The filter chamber comprises a sample gas inlet, a channel solenoid valve, a cavity and a filter screen. The filter chamber forms a vacuum through a sampling pump, opens the channel solenoid valve, sucks in sample gas escaping from the air or the biochemical pool, and the gas is introduced into the heating chamber through the filter screen.

[0046] The heating chamber includes a chamber, a heating resistor, and a one-way damping channel. The heating resistor is a heating element. By controlling the heating resistor, the temperature and humidity of the gas in the chamber can reach the specified requirements. The one-way damping channel is provided with a blocking sheet on the basis of an ordinary channel. The blocking sheets are arranged crosswise at a certain angle so that the gas can pass through the heating chamber in an orderly manner. Since the blocking sheets are arranged at an angle, the gas backflow is prevented. Specifically, referring to Figure 2 As shown, the heating chamber 12 is provided with a heating resistor 121, and one-way damping channels 122 and 123. The one-way damping channels 122 and 123 are respectively the channels for gas to enter the O2 content parameter detection chamber 13 and the CO2 content parameter detection chamber 14. At the same time, the one-way damping channel can prevent the O2 content parameter detection chamber 13 and the CO2 content parameter detection chamber 14 from interfering with each other and affecting the test results.

[0047] Reference Figure 2 As shown, the parameter detection chamber is divided into an O2 parameter detection chamber 13 and a CO2 parameter detection chamber 14. The O2 parameter detection chamber 13 is provided with a temperature and humidity detection sensor 131, a gas pressure sensor 132, an O2 content detection sensor 133, a flow sensor 134 and an air outlet 135; the CO2 parameter detection chamber 14 is provided with a temperature and humidity detection sensor 141, a gas pressure sensor 142, an O2 content detection sensor 143, a flow sensor 144 and a chamber air outlet 145.

[0048] The O2 content parameter detection chamber gas outlet 135 and the CO2 content parameter detection chamber gas outlet 145 are connected to the sampling pump 15 and the sampling pump 16 respectively.

[0049] The O2 content detection sensor is used to detect the O2 content of the air or sample gas entering the chamber. The CO2 content detection sensor is used to detect the CO2 component content of the air or sample gas entering the chamber. The temperature and humidity detection sensor is used to detect the temperature and humidity of the air or sample gas entering the chamber. The gas pressure sensor is used to detect the gauge pressure of the air or sample gas entering the chamber. The flow sensor is used to detect the gas flow of the air or sample gas entering the chamber.

[0050] After the air or sample gas enters the O2 parameter detection chamber 13, the gas pressure sensor 132 and the flow sensor 134 measure the gauge pressure and real-time flow of the air or sample gas, and transmit the parameters to the control system 17; similarly, after the air or sample gas enters the CO2 parameter detection chamber 14, the gas pressure sensor 142 and the flow sensor 144 detect the gauge pressure and real-time flow of the air or sample gas in the detection chamber 14, and also transmit the parameters to the control system 17.

[0051] The control system 17 controls the pressure and flow rate in the chamber 13 by controlling the rotation speed of the sampling pump 15, so that the pressure is controlled within ±10% of the atmospheric pressure and the flow rate data is positive.

[0052] In the chamber 13, the O2 content detection sensor 133 detects the O2 content concentration data of the air or sample gas and transmits it to the control system 17, and the temperature and humidity detection sensor 132 detects the temperature and humidity data of the air or sample gas and transmits it to the control system 17. Similarly, the operation principle of the CO2 content parameter detection chamber 14 is the same as that of the O2 content detection chamber 13, and finally obtains the CO2 content concentration data and temperature and humidity data of the air or sample gas and stores them in the control system 17.

[0053] At this point, the parameters obtained by the control system 17 are sent to the OTE operation module 2, which performs data processing and comprehensive operations to obtain the OTE results. In combination with the cloud platform 3 storing massive OTE data, the cloud platform 3 can perform big data analysis on the existing OTE data and obtain more optimized diagnostic results and send them back to the OTE operation module 2.

[0054] The control system is a single-chip circuit system, which has switch input and output functions, analog input and output functions, pulse equivalent input and output functions, I2C communication functions, UART communication functions, and programming functions. The control system is used to control the pump and valve actions of the entire gas analyzer, the start and stop of the heating resistor, and the communication of each sensor. By using analog signals or I 2 The data can be read by the integrated circuit bus of C or UART serial data communication, all sensors can be read by the same method, or a combination of the three reading methods can be used. The present invention is not limited to a specific data reading method.

[0055] The control system processes the different data read, converts them into a unified data format, and stores them in the storage space set by the system. At the same time, the control system sends the status and data of the gas analyzer to the oxygen transfer efficiency (OTE) calculation module, and receives the adjustment feedback of the system from the OTE calculation module.

[0056] The oxygen transfer efficiency (OTE) calculation module includes a communication unit, a calculation unit, a network unit, and a touch screen. The oxygen transfer efficiency (OTE) calculation module is used to calculate the data obtained by the gas analyzer, calculate the OTE and other performance parameters and store them. At the same time, human-computer interaction is performed through the touch screen, and the obtained data can also be transmitted to the cloud platform.

[0057] The communication unit communicates with the control system of the gas analyzer to exchange data, that is, obtains all data from the control system of the gas analyzer and sends commands and data to the control system of the gas analyzer.

[0058] The operation unit operates the obtained data according to the gas phase mass conservation principle, stores the data of each operation, performs big data analysis based on historical data, and gives OTE results.

[0059] The network unit performs network communication with the cloud platform.

[0060] The touch screen is used to display the data obtained and calculated by the device, as well as the device operation and fault status. It can also display historical data and curves, and at the same time, it can set the parameters required for the device operation, which is convenient for parameter adjustment and device debugging.

[0061] The cloud platform consists of front-end display, back-end processing, and a remote access platform for big data analysis. The front-end display, by using web technology, can access the data of the device and browse the operating status through a web page at any place and at any time through a networked computer or mobile terminal. The back-end processing stores and manages data through a network cloud server and provides database services for the device. The stored data is used for front-end display, big data analysis and OTE calculations.

[0062] The size and structure of the device of the embodiment of the present invention are not subject to the above limitations.

[0063] Reference Figure 3 As shown in the figure, when a sewage treatment biochemical pool needs to conduct oxygen transfer efficiency (OTE) detection, the air inlet solenoid valve is first opened, and the air is drawn by the sampling pump to allow air to enter the filter chamber. After the impurities are filtered out, the gas enters the heating chamber. Under the control of the control system, the gas is heated to a suitable temperature and humidity, and then enters the O2 content parameter detection chamber and the CO2 content parameter detection chamber respectively through the one-way damping channel. The O2 content parameters, CO2 content parameters and temperature and humidity parameters of the air are measured in the parameter detection chamber, and the measured data are effectively screened, the deviation data are eliminated, and the remaining data are averaged. Algorithm, then, close the air inlet solenoid valve, open the sample gas inlet solenoid valve, and let the sample gas enter the filter chamber through the extraction of the sampling pump. After filtering out impurities, it enters the heating chamber, and heats the sample gas to a suitable temperature and humidity under the control of the control system. Then, it passes through the one-way damping channel to enter the O2 content parameter detection chamber and the CO2 content parameter detection chamber respectively. In the parameter detection chamber, the O2 content parameters, CO2 content parameters and temperature and humidity parameters of the sample gas are measured, and the measured data are effectively deleted, the deviation data are eliminated, and the remaining data are averaged.

[0064] The data obtained in the above steps are sent to the OTE calculation module, and the oxygen transfer efficiency OTE calculation is performed in the OTE calculation module. The calculation formula is as follows:

[0065]

[0066] in:

[0067] Ye = O2 content in the sample gas escaping from the water surface during the sewage aeration treatment process;

[0068] Yi = O2 content in the ambient air around the sewage treatment plant;

[0069] Ycde = CO2 content in the gas released from the water surface during the sewage aeration treatment process;

[0070] Ycdi = CO2 content in the ambient air around the sewage treatment plant;

[0071] Yrhe = humidity data of the gas escaping from the surface of the water body in the sewage aeration treatment process;

[0072] Yrhi = humidity data in the ambient air around the sewage treatment plant;

[0073] Yte = Temperature data of the gas escaping from the surface of the water body in the sewage aeration treatment process;

[0074] Yti = temperature data of ambient air around the sewage treatment plant;

[0075] The experimental data is shown in Table 1:

[0076] Ye Yi YcD Yj Yrhe Yrhi Yte Y OTE(%) 0.19985 0.20036 0.00104 0.00104 0.2797 0.2781 51.91 52.17 0.313％ 0.19634 0.20036 0.00099 0.00104 0.2797 0.2781 51.64 52.17 2.520％ 0.19235 0.20036 0.00096 0.00104 0.2797 0.2781 60.00 52.17 4.615％ 0.18754 0.20036 0.00091 0.00104 0.2797 0.2781 61.78 52.17 7.495％ 0.18490 0.20036 0.00094 0.00104 0.2797 0.2781 65.52 52.17 8.939％

[0077] Table 1

[0078] As shown in Table 1, when OTE is 8.939%, it means that the current oxygen transfer efficiency is high, when OTE is 4.615%, it means that the current oxygen transfer efficiency is medium, and when OTE is 0.313%, it means that the current oxygen transfer efficiency is low. The specific data can be used for sewage treatment plant process operation calculations.

[0079] This process is repeated to measure the real-time data of oxygen transfer efficiency (OTE) in each cycle, and the data is displayed on the touch screen. At the same time, the data is sent to the cloud platform for use by deeper systems.

[0080] From the above, it can be seen that the present invention realizes the detection function of aeration performance in sewage treatment process, can be used for sewage treatment plant process operation control and regulation or sewage treatment plant equipment operation effect detection, and helps analyze energy consumption. The device of the present invention is small in size, automated in procedure, and automatically records data. It is easy to carry and install, and is easy to install and use in sewage treatment plants.

[0081] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. 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. A multi-gas parameter detection device for sewage treatment, comprising a gas analyzer, characterized in that: It also includes OTE operation module; The gas analyzer comprises a filtering chamber, a heating chamber, a parameter detection chamber and a sampling pump which are respectively connected to the control system; The filter chamber comprises an air inlet, a sample gas inlet, a channel solenoid valve, a cavity and a filter screen; the air inlet and the sample gas inlet are respectively provided with an on-off solenoid valve, and the solenoid valve controls the air inlet selection, so that the air and the sample gas enter the filter chamber at different times; The filter chamber forms a vacuum through the sampling pump, opens the channel solenoid valve, sucks in the air or sample gas escaping from the biochemical pool, and the gas is introduced into the heating chamber through the filter screen; The heating chamber includes a heating resistor and a one-way damping channel; the gas passes through the heating chamber and then to the parameter detection chamber; The parameter detection chamber includes an oxygen content detection sensor, a carbon dioxide content detection sensor, a temperature and humidity detection sensor, a gas pressure sensor, and a flow sensor; The control system is used to control the pump and valve actions of the entire gas analyzer, the start and stop of the heating resistor, and the communication of each sensor; The control system is communicatively connected with the OTE operation module.

2. The multi-gas parameter detection device for sewage treatment according to claim 1 is characterized in that: The filter chamber is arranged at the front end, the heating chamber is arranged in the middle, the parameter detection chamber is arranged at the rear end, the sampling pump is arranged at the end, and the control system is embedded inside; The filtering chamber, heating chamber, parameter detection chamber, sampling pump and control system are integrated into one by using epoxy resin waterproof electronic potting glue packaging and curing technology.

3. The multi-gas parameter detection device for sewage treatment according to claim 1 is characterized in that: The filter screen is made of a stainless steel mesh, and the mesh number is between 50 meshes and 100 meshes.

4. The multi-gas parameter detection device for sewage treatment according to claim 1, characterized in that: Blocking plates are arranged in the one-way damping channel, and the blocking plates are cross-arranged at a certain angle so that the gas can pass through the heating chamber in an orderly manner.

5. The multi-gas parameter detection device for sewage treatment according to claim 1 is characterized in that: The parameter detection chamber is divided into an O2 parameter detection chamber and a CO2 parameter detection chamber. The O2 parameter detection chamber is provided with a temperature and humidity detection sensor, a gas pressure sensor, an O2 content detection sensor, a flow sensor and an air outlet; the CO2 parameter detection chamber is provided with a temperature and humidity detection sensor, a gas pressure sensor, an O2 content detection sensor, a flow sensor and an air outlet.

6. The multi-gas parameter detection device for sewage treatment according to claim 1, characterized in that: The OTE operation module includes a touch screen, which is used to display the data obtained and calculated by the device, the device operation and fault status, and display historical data and curves; At the same time, the parameters required for the operation of the device can be set.

7. The multi-gas parameter detection device for sewage treatment according to claim 1, characterized in that: It also includes a cloud platform, so the cloud platform is connected to the OTE computing module for communication; The cloud platform includes a front-end display module and a back-end processing module, and is provided with a remote access platform for big data analysis.

8. A method for detecting multiple gas parameters in sewage treatment, based on the multiple gas parameter detection device for sewage treatment according to any one of claims 1 to 7, characterized in that: The following steps are included: First, open the air inlet solenoid valve, and draw air through the sampling pump to allow air to enter the filter chamber. After filtering out impurities, the gas enters the heating chamber. Under the control of the control system, the gas is heated to a suitable temperature and humidity. Then, it enters the O2 content parameter detection chamber and the CO2 content parameter detection chamber through the one-way damping channel respectively. In the parameter detection chamber, the O2 content parameter, CO2 content parameter and temperature and humidity parameters of the air are measured, and the measured data are screened, the deviation data are eliminated, and the remaining data are averaged. After that, close the air inlet solenoid valve, open the sample gas inlet solenoid valve, draw through the sampling pump, allow the sample gas to enter the filter chamber, filter out impurities, and then enter the heating chamber. Under the control of the control system, the sample gas is heated to a set temperature and humidity. Then, it enters the O2 content parameter detection chamber and the CO2 content parameter detection chamber through the one-way damping channel respectively. In the parameter detection chamber, the O2 content parameter, CO2 content parameter and temperature and humidity parameters of the sample gas are measured, and the measured data are screened, the deviation data are eliminated, and the remaining data are averaged. It also includes oxygen transfer efficiency calculation in the OTE calculation module, and the calculation formula is as follows: in: Ye = O2 content in the sample gas escaping from the water surface during the sewage aeration treatment process; Yi = O2 content in the ambient air around the sewage treatment plant; Ycde = CO2 content in the gas released from the water surface during the sewage aeration treatment process; Ycdi = CO2 content in the ambient air around the sewage treatment plant; Yrhe = humidity data of the gas escaping from the surface of the water body in the sewage aeration treatment process; Yrhi = humidity data in the ambient air around the sewage treatment plant; Yte = temperature data of the gas escaping from the water surface in the sewage aeration treatment process; Yti = Temperature data of ambient air gas around the sewage treatment plant.

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