Unpowered high-efficiency sewage treatment system

Abstract

The invention relates to the technical field of sewage treatment equipment, in particular to an unpowered high-efficiency sewage treatment system which comprises a filter unit, an anaerobic unit, an anoxic unit, an aerobic unit, a sludge sedimentation tank and a clean water tank, comprising an image acquisition unit used for acquiring a sewage gray value, a nitrogen concentration detection unit used for acquiring sewage nitrogen concentration, a dissolved oxygen concentration detection unit used for acquiring dissolved oxygen concentration, and a transmittance detection unit used for acquiring water transmittance of the aerobic unit; the control module is used for judging whether the filtration of the sewage reaches the standard or not according to the average gray value of the sewage, judging whether the anaerobic treatment of the sewage reaches the standard or not according to the nitrogen concentration of the water body and judging whether the aerobic treatment of the sewage reaches the standard or not according to the dissolved oxygen concentration, so that the sewage treatment efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment equipment, and particularly to a high-efficiency sewage treatment system based on non-powered Background Technique

[0002] Non-powered sewage treatment is an environmental protection technology that relies on non-mechanical driving methods such as natural gravity and water flow power to achieve sewage purification. The core of this technology lies in using natural physical and biological processes, such as precipitation, filtration, adsorption, and microbial degradation, to treat sewage without additional energy input. Non-powered sewage treatment systems usually include components such as grids, sedimentation tanks, and biological filters. Through the coordinated action of these structures, pollutants such as suspended solids, organic matter, nitrogen, and phosphorus in sewage are removed.

[0003] In a non-powered sewage treatment system, sewage first passes through a grid to remove large particulate impurities, and then enters a sedimentation tank. The heavy particulate matter such as sediment is separated by gravity. After that, the sewage flows into the sedimentation tank. The whole process does not require external power, which not only reduces the operation cost but also reduces the secondary pollution to the environment.

[0004] Due to its economy, environmental protection, and sustainability, non-powered sewage treatment technology is particularly suitable for rural areas, small communities, and remote areas lacking power supply, and is one of the important ways to achieve ecological sewage treatment.

[0005] Chinese Patent Application Publication No.: CN113620506A, discloses a non-powered rapid oxygenation rural domestic sewage treatment device and treatment method, including an anaerobic unit and an oxygenation aerobic unit. The oxygenation aerobic unit includes a gravity aeration system and an aerobic reaction system. The gravity aeration system includes a tiltable water bucket, a piston assembly, an air suction pipe, a guide pipe, and an aeration head. The sewage discharged from the anaerobic unit is discharged into the tiltable water bucket from above the tiltable water bucket. The tiltable water bucket, the air suction pipe, and the guide pipe are respectively connected to the piston assembly. The aeration head is connected to the guide pipe, and the aeration head is located in the aerobic reaction system. Before the water storage volume in the tiltable water bucket reaches the preset water volume, the piston is squeezed to discharge air. When the water storage volume in the tiltable water bucket reaches the preset water volume, it tilts to discharge the stored sewage, and the piston returns to its original position.

[0006] It can be seen that the above technical solution does not consider the influence of the aeration volume on the sewage treatment effect and does not consider the different requirements of the sewage treatment process for the differences in sewage quality characteristics, resulting in the problem of low sewage treatment efficiency. Summary of the Invention

[0007] To this end, the present invention provides a high-efficiency sewage treatment system based on non-power, which is used to overcome the problems in the prior art that the influence of aeration volume on the sewage treatment effect is not considered and the different requirements of sewage treatment processes due to the differences in sewage quality characteristics are not considered, resulting in low sewage treatment efficiency.

[0008] To achieve the above object, the present invention provides a high-efficiency sewage treatment system based on non-power, comprising:

[0009] A filtration unit, which is used to filter sewage, including a grille installed inside at a preset inclination angle and a water inlet opened on the side wall;

[0010] An anaerobic unit, which is connected to the filtration unit through a first water pipe and is used to anaerobically treat sewage;

[0011] An anoxic unit, which is arranged below the anaerobic unit, is connected to the filtration unit through a second water pipe arranged on the side wall, and is connected to the anaerobic unit through a third water pipe arranged on the top, and is used to anoxically treat sewage;

[0012] An aerobic unit, which is connected to the anaerobic unit through a fourth water pipe and is connected to the anoxic unit through a fifth water pipe, and is used to aerobically treat sewage;

[0013] A sludge sedimentation tank, which is connected to the aerobic unit through a sixth water pipe, and an overflow port is arranged on the side wall of the sludge sedimentation tank;

[0014] A clear water tank, which is connected to the sludge sedimentation tank through a seventh water pipe and is used to store clear water, wherein the seventh water pipe communicates with the overflow port;

[0015] A data acquisition module, which includes an image acquisition unit arranged at the inlet of the first water pipe to obtain the gray value of sewage, a nitrogen concentration detection unit arranged in the anaerobic unit to obtain the nitrogen concentration of sewage, a dissolved oxygen concentration detection unit arranged at the inlet of the sixth water pipe to obtain the dissolved oxygen concentration, and a light transmittance detection unit arranged at the top of the aerobic unit to obtain the water body light transmittance of the aerobic unit;

[0016] A control module, which is respectively connected to the data acquisition module and several solenoid valves, and is used to trigger a grille blockage warning according to the comparison result between the average gray value of sewage and the preset gray value or transport the filtered sewage to the anaerobic unit, determine whether to transport the anaerobically treated sewage to the aerobic unit or the anoxic unit according to the nitrogen concentration in the water body, and determine whether the aerobic treatment of sewage meets the preset standard according to the dissolved oxygen concentration.

[0017] Further, the height of the first water delivery pipe is not higher than the height of the water inlet, the height of the fourth water delivery pipe is not higher than the height of the first water delivery pipe, and the height of the fifth water delivery pipe is not higher than the height of the second water delivery pipe. Among them, electromagnetic valves are respectively arranged on the first water delivery pipe, the second water delivery pipe, the third water delivery pipe, the fourth water delivery pipe, and the sixth water delivery pipe.

[0018] Further, the control module determines whether the filtration of the sewage meets the preset standard according to the average gray value of the sewage. Among them,

[0019] If the average gray value is less than the first preset gray value, it is determined that the filtration of the sewage does not meet the preset standard, the grid is determined to be blocked and a warning is issued;

[0020] If the average gray value is greater than or equal to the first preset gray value and less than the second preset gray value, it is determined that the filtration of the sewage does not meet the preset standard, and whether the filtration of the sewage meets the preset standard is re-determined according to the filtration evaluation value of the sewage;

[0021] If the average gray value is greater than or equal to the second preset gray value, it is determined that the filtration of the sewage meets the preset standard, and the electromagnetic valve on the second water delivery pipe is opened to convey the filtered sewage to the anoxic unit;

[0022] The average gray value is the arithmetic mean of the gray values of all pixels in the image of the sewage.

[0023] Further, the control module conveys the filtered sewage to the anaerobic unit according to the comparison result between the filtration evaluation value and the preset filtration evaluation value, or reduces the grid bar spacing of the next batch;

[0024] The filtration evaluation value is the variance of the sewage gray value.

[0025] Further, the reduction amplitude of the grid bar spacing is positively correlated with the filtration difference, where the filtration difference is the difference between the filtration evaluation value and the preset filtration evaluation value.

[0026] Further, the control module conveys the sewage after anaerobic treatment to the aerobic unit according to the comparison result between the nitrogen concentration in the water body and the preset nitrogen concentration in the water body, or conveys the sewage after anaerobic treatment to the anoxic unit;

[0027] The nitrogen concentration in the water body is obtained by the nitrogen concentration detection unit.

[0028] Further, the control module determines that the aerobic treatment of the sewage does not meet the preset standard according to the comparison result that the dissolved oxygen concentration is less than the first preset dissolved oxygen concentration, and reduces the valve opening of the electromagnetic valve on the fourth water pipe according to the difference between the first preset dissolved oxygen concentration and the dissolved oxygen concentration;

[0029] Moreover, the control module determines that the aerobic treatment of the sewage does not meet the preset standard according to the comparison result that the dissolved oxygen concentration is greater than or equal to the first preset dissolved oxygen concentration and less than the second preset dissolved oxygen concentration, and determines the adjustment strategy according to the water body purification evaluation value;

[0030] The dissolved oxygen concentration is obtained by a dissolved oxygen concentration detection unit.

[0031] Furthermore, in response to the dissolved oxygen concentration being greater than or equal to the second preset dissolved oxygen concentration, the control module determines that the aerobic treatment of the sewage meets the preset standard, and opens the solenoid valve on the sixth water delivery pipe to convey the sewage after aerobic treatment to the sludge sedimentation tank.

[0032] Furthermore, the control module is provided with several opening reduction methods for reducing the opening of the solenoid valve on the fourth water pipe, and each opening reduction method has a different reduction amplitude for the valve opening.

[0033] Furthermore, the control module determines the adjustment strategy according to the water body purification evaluation value, where

[0034] if the water body purification evaluation value is less than the first preset water body purification threshold, the filler content of the aerobic unit is reduced according to the difference between the water body purification evaluation value and the first preset water body purification threshold;

[0035] if the water body purification evaluation value is greater than or equal to the first preset water body purification threshold and less than the second preset water body purification threshold, the temperature of the aerobic treatment is increased according to the difference between the water body purification evaluation value and the second preset water body purification threshold;

[0036] if the water body purification evaluation value is greater than or equal to the second preset water body purification threshold, the duration of the aerobic treatment is increased according to the difference between the water body purification evaluation value and the second preset water body purification threshold;

[0037] The water body purification evaluation value is the ratio between the water body light transmittance and the preset light transmittance.

[0038] Compared with the prior art, the beneficial effects of the present invention are that the present invention effectively removes large particulate impurities in the sewage through a grille with a preset inclination angle, reduces the burden on subsequent treatment units, is provided with an anaerobic unit, an anoxic unit and an aerobic unit, effectively removes organic matter and nitrogen in the sewage, sets a sludge sedimentation tank to separate sludge from clear water, and conveys the clear water to the clear water tank through an overflow port; during the sewage treatment process, the grille state is determined by double judgment of the grayscale value and variance, and the bar spacing is actively adjusted to avoid the decline in treatment capacity caused by blockage of large particulate matter; the anaerobic treatment effect of the sewage is inspected through the water body nitrogen concentration; through the dissolved oxygen concentration and the water body purification evaluation value, the aerobic treatment process of the sewage is monitored in real time, and the valve opening, filler content, treatment temperature and treatment duration are dynamically adjusted, thereby improving the sewage treatment efficiency.

[0039] Furthermore, the present invention obtains the gray value of the sewage through an industrial camera, evaluates the filtration effect of the sewage in real time, and the control module determines whether the filtration meets the preset standard according to the gray value, and dynamically adjusts the grid spacing and valve opening degree, thereby improving the sewage filtration efficiency.

[0040] Furthermore, the present invention automatically switches the sewage flow direction through the filtration evaluation value and the nitrogen concentration in the water body. The intelligent switching of the anaerobic, anoxic, and aerobic units enables the sewage to enter the corresponding treatment unit according to different treatment requirements, achieving precise diversion, thereby improving the sewage treatment efficiency.

[0041] Furthermore, the present invention reduces the valve opening degree of the solenoid valve on the fourth water pipe according to the difference between the first preset dissolved oxygen concentration and the dissolved oxygen concentration, reducing the amount of sewage entering the aerobic unit, thereby increasing the dissolved oxygen concentration in the sewage per unit volume.

[0042] Furthermore, the control module of the present invention is provided with several opening degree reduction methods for reducing the valve opening degree, and each opening degree reduction method has a different reduction amplitude for the valve opening degree, thereby realizing precise control of the valve opening degree.

[0043] Furthermore, the control module of the present invention determines the adjustment strategy according to the water body purification evaluation value, including reducing the packing content of the aerobic unit, increasing the temperature of the aerobic treatment, or increasing the duration of the aerobic treatment, optimizing the sewage treatment parameters, thereby improving the resource utilization rate.

[0044] Furthermore, the present invention increases the duration of the aerobic treatment according to the difference between the water body purification evaluation value and the second preset water body purification threshold, realizing precise control of the increase amplitude of the duration of the aerobic treatment.

[0045] Furthermore, the present invention realizes the gravity flow design by setting the height of the first water pipe not higher than the height of the water inlet, the height of the fourth water pipe not higher than the height of the first water pipe, and the height of the fifth water pipe not higher than the height of the second water pipe. Combined with the precise opening and closing control of the solenoid valve, it ensures that the system can still maintain stable operation under the condition of no external power. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic structural diagram of the high-efficiency sewage treatment system based on no power according to the embodiment of the present invention;

[0047] Figure 2 It is a schematic diagram of the module connection of the high-efficiency sewage treatment system based on no power according to the embodiment of the present invention;

[0048] Figure 3It is a flowchart for determining whether the filtration of sewage in the embodiments of the present invention meets the preset standards;

[0049] Figure 4 It is a flowchart for determining the transportation strategy of the sewage after anaerobic treatment in the embodiments of the present invention;

[0050] In the figure, 1 is the filtration unit; 11 is the grille; 2 is the anaerobic unit; 21 is the first water delivery pipe; 3 is the anoxic unit; 31 is the second water delivery pipe; 32 is the third water delivery pipe; 4 is the aerobic unit; 41 is the fourth water delivery pipe; 42 is the fifth water delivery pipe; 43 is the air intake pipe; 5 is the sludge sedimentation tank; 51 is the sixth water delivery pipe; 6 is the clear water tank; 61 is the seventh water delivery pipe; 7 is the solenoid valve. Detailed implementation manners

[0051] In order to make the objectives and advantages of the present invention more clear, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0052] The preferred implementation manners of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principles of the present invention and do not limit the protection scope of the present invention.

[0053] It should be noted that the data in this embodiment are obtained through comprehensive analysis and evaluation of the historical detection data and corresponding historical detection results of the present invention in the three months before this detection. Those skilled in the art can understand that the determination method of the present invention for a single above-mentioned parameter can be to select the value with the highest proportion according to the data distribution as the preset standard parameter, use weighted summation to obtain the value as the preset standard parameter, substitute each historical data into a specific formula and use the value obtained by this formula as the preset standard parameter or other selection methods, as long as it meets that the method of the present invention can clearly define different specific situations in the single determination process through the obtained values.

[0054] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 as shown, which are respectively the structural schematic diagram of the energy-efficient sewage treatment system based on non-power in the embodiments of the present invention; the module connection schematic diagram of the energy-efficient sewage treatment system based on non-power in the embodiments of the present invention; the flowchart for determining whether the filtration of sewage in the embodiments of the present invention meets the preset standards; the flowchart for determining the transportation strategy of the sewage after anaerobic treatment in the embodiments of the present invention.

[0055] The embodiments of the present invention provide an energy-efficient sewage treatment system based on non-power, including:

[0056] Please refer toFigure 1 , a filtering unit 1 for filtering sewage, including a grille 11 installed inside at a preset inclination angle of 60° and a water inlet opened on the side wall;

[0057] An anaerobic unit 2, which is connected to the filtering unit 1 through a first water pipe 21 for anaerobic treatment of sewage;

[0058] An anoxic unit 3, which is arranged below the anaerobic unit 2, is connected to the filtering unit 1 through a second water pipe 31 arranged on the side wall, and is connected to the anaerobic unit 2 through a third water pipe 32 arranged on the top for anoxic treatment of sewage;

[0059] An aerobic unit 4, which is connected to the anaerobic unit 2 through a fourth water pipe 41 and is connected to the anoxic unit 3 through a fifth water pipe 42. An air inlet pipe 43 is arranged on the top of the aerobic unit 4 for aerobic treatment of sewage;

[0060] A sludge sedimentation tank 5, which is connected to the aerobic unit 4 through a sixth water pipe 51, and an overflow port is arranged on the side wall of the sludge sedimentation tank 5;

[0061] A clear water tank 6, which is connected to the sludge sedimentation tank 5 through a seventh water pipe 61 for storing clear water. Among them, the seventh water pipe 61 communicates with the overflow port and is connected to the overflow port. Among them, electromagnetic valves 7 are arranged on the first water pipe 21, the second water pipe 31, the third water pipe 32, the sixth water pipe 51 and the fourth water pipe 41;

[0062] A data acquisition module, which includes an image acquisition unit arranged at the inlet of the first water pipe 21 for obtaining the gray value of sewage, a nitrogen concentration detection unit arranged in the anaerobic unit 2 for obtaining the nitrogen concentration of sewage, a dissolved oxygen concentration detection unit arranged at the inlet of the sixth water pipe 51 for obtaining the dissolved oxygen concentration, and a light transmittance detection unit arranged on the top of the aerobic unit 4 for obtaining the water body light transmittance of the aerobic unit 4;

[0063] A control module, which is respectively connected to the data acquisition module and several electromagnetic valves, for triggering a grille blockage warning according to the comparison result between the average gray value of sewage and the preset gray value or conveying the filtered sewage to the anaerobic unit, for determining whether to transfer the anaerobically treated sewage to the aerobic unit or the anoxic unit according to the nitrogen concentration in the water body, and for determining whether the aerobic treatment of sewage meets the preset standard according to the dissolved oxygen concentration.

[0064] Specifically, the specific structure of the control module is not limited. It itself and each unit therein can be composed of logic components, and the logic components include field programmable components, computers or microprocessors in computers.

[0065] Specifically, the height of the first water delivery pipe 21 is not higher than the height of the water inlet, the height of the fourth water delivery pipe 41 is not higher than the height of the first water delivery pipe 21, and the height of the fifth water delivery pipe 42 is not higher than the height of the second water delivery pipe 31. Among them, electromagnetic valves are respectively arranged on the first water delivery pipe, the second water delivery pipe, the third water delivery pipe, the fourth water delivery pipe and the sixth water delivery pipe.

[0066] Please refer to Figure 3 , specifically, the control module determines whether the filtration of the sewage meets the preset standard according to the average gray value of the sewage. Among them,

[0067] If the average gray value is less than the first preset gray value 80, it is determined that the filtration of the sewage does not meet the preset standard, and it is determined that the grille 11 is blocked and a warning is issued;

[0068] If the average gray value is greater than or equal to the first preset gray value and less than the second preset gray value 120, it is determined that the filtration of the sewage does not meet the preset standard, and whether the filtration of the sewage meets the preset standard is determined again according to the filtration evaluation value of the sewage;

[0069] If the average gray value is greater than or equal to the second preset gray value, it is determined that the filtration of the sewage meets the preset standard, and the electromagnetic valve 7 on the second water delivery pipe 31 is opened to convey the filtered sewage to the anoxic unit 3;

[0070] The gray value is obtained by the image acquisition unit. The image acquisition unit can be an industrial camera, and specific limitations are not made, as long as the gray value acquisition requirement is met.

[0071] After obtaining the image of the sewage through the image acquisition unit, calculate the arithmetic mean of the gray values of all pixels in the image, which is recorded as the average gray value;

[0072] In this embodiment, the value range of the first preset gray value is (65, 95), and the value range of the second preset gray value is (105, 135). The lower the gray value of the sewage, the more impurities and darker color in the sewage. Preferably, the first preset gray value is selected as 80 and the second preset gray value is selected as 120. However, the above values are not limited to this, and those skilled in the art can also adjust the values according to actual needs.

[0073] Specifically, the control module determines whether the filtration of the sewage meets the preset standard again according to the filtration evaluation value. Among them,

[0074] If the filtration evaluation value is less than the preset filtration evaluation value 15, it is determined that the filtration of the sewage meets the preset standard, and the electromagnetic valve 7 on the first water delivery pipe 21 is opened to convey the filtered sewage to the anaerobic unit 2;

[0075] If the filtering evaluation value is greater than or equal to the preset filtering evaluation value, it is determined that the filtering of the sewage does not meet the preset standard, and the grid bar spacing of the next batch is reduced according to the difference between the filtering evaluation value and the preset filtering evaluation value;

[0076] The filtering evaluation value is the variance of the sewage gray value.

[0077] In this embodiment, the value range of the preset filtering evaluation value is (10, 20), and the filtering evaluation value is used to characterize the sewage filtering effect; a smaller variance indicates that the gray value distribution of the sewage image is relatively uniform and the impurity distribution is relatively uniform; a larger variance indicates that the gray value distribution of the sewage image is not uniform and there may be more impurities or pollutants agglomerated.

[0078] In this embodiment, the preset filtering evaluation value is taken as 15, but the above value is not limited to this, and those skilled in the art can also adjust this value according to actual needs.

[0079] Specifically, the reduction amplitude of the grid bar spacing is positively correlated with the filtering difference. Among them, the positive correlation is, for example, a linear positive correlation or a non-linear positive correlation. The linear slope of the linear positive correlation is not specifically limited. It can be understood that the greater the filtering difference, the greater the reduction amplitude of the grid bar spacing; the filtering difference is the difference between the filtering evaluation value and the preset filtering evaluation value.

[0080] Please refer to Figure 4 , specifically, the control module determines the transportation strategy of the sewage after anaerobic treatment according to the nitrogen concentration in the water body. Among them,

[0081] If the nitrogen concentration in the water body is less than the preset nitrogen concentration in the water body of 8.6 mg / L, the control module controls the solenoid valve 7 on the fourth water delivery pipe 41 to be opened, and transports the sewage after anaerobic treatment to the aerobic unit 4;

[0082] If the nitrogen concentration in the water body is greater than or equal to the preset nitrogen concentration in the water body, the control module controls the solenoid valve 7 on the third water delivery pipe 32 to be opened, and transports the sewage after anaerobic treatment to the anoxic unit 3;

[0083] The nitrogen concentration in the water body is obtained through a nitrogen concentration detection unit. The nitrogen concentration detection unit can be an ammonia nitrogen analyzer, which is not specifically limited, as long as it meets the nitrogen concentration detection requirements.

[0084] In this embodiment, the preset nitrogen concentration in the water body is taken as 8.6 mg / L, but the above value is not limited to this, and those skilled in the art can also adjust this value according to actual needs.

[0085] Specifically, the main purpose of anaerobic treatment is to degrade organic matter; if the ammonia nitrogen concentration after anaerobic treatment is lower than the preset value and the nitrogen concentration of the sewage is low, it indicates that the sewage can directly enter the aerobic unit 4 for treatment; if the concentration is higher than or equal to the preset value, it means that the nitrogen concentration of the sewage is high, and denitrification needs to be carried out through the anoxic unit 3 and then aerobic treatment, thereby improving the sewage treatment efficiency.

[0086] Specifically, the control module determines that the aerobic treatment of the sewage does not meet the preset standard according to the comparison result that the dissolved oxygen concentration is less than the first preset dissolved oxygen concentration of 2 mg / L, and reduces the valve opening of the solenoid valve 7 on the fourth water pipe according to the difference between the first preset dissolved oxygen concentration and the dissolved oxygen concentration.

[0087] In addition, the control module determines that the aerobic treatment of the sewage does not meet the preset standard according to the comparison result that the dissolved oxygen concentration is greater than or equal to the first preset dissolved oxygen concentration and less than the second preset dissolved oxygen concentration of 5 mg / L, and determines the adjustment strategy according to the water body purification evaluation value.

[0088] The dissolved oxygen concentration is obtained by the dissolved oxygen concentration detection unit, and the dissolved oxygen concentration detection unit is a dissolved oxygen meter.

[0089] In this embodiment, the control module determines that the aerobic treatment of the sewage does not meet the preset standard according to the comparison result that the dissolved oxygen concentration is less than the first preset dissolved oxygen concentration of 2 mg / L, indicating that the amount of sewage entering per unit time exceeds the oxygen supply capacity of the aeration system. Reducing the valve opening and restricting the influent flow can make the oxygen supply amount of the intake pipe 43 match the pollutant load.

[0090] Specifically, the control module responds to the dissolved oxygen concentration being greater than or equal to the second preset dissolved oxygen concentration, determines that the aerobic treatment of the sewage meets the preset standard, and opens the solenoid valve 7 on the sixth water pipe 51 to convey the sewage to the sludge sedimentation tank 5.

[0091] In this embodiment, the first preset dissolved oxygen concentration is 2 mg / L, and the second preset dissolved oxygen concentration is 4 mg / L.

[0092] Specifically, the control module is provided with several ways to reduce the valve opening, among which,

[0093] If the dissolved oxygen concentration difference is less than the first preset concentration difference of 1.5 mg / L, the first adjustment coefficient of 0.98 is used to reduce the valve opening to the corresponding value;

[0094] If the dissolved oxygen concentration difference is greater than or equal to the first preset concentration difference and less than the second preset concentration difference of 2.6 mg / L, the second adjustment coefficient of 0.96 is used to reduce the valve opening to the corresponding value;

[0095] If the difference in dissolved oxygen concentration is greater than or equal to the second preset concentration difference, the valve opening is reduced to the corresponding value using the third adjustment coefficient of 0.94;

[0096] The difference in dissolved oxygen concentration is the difference between the first preset dissolved oxygen concentration and the dissolved oxygen concentration.

[0097] Specifically, the control module determines an adjustment strategy based on the water purification evaluation value, where

[0098] If the water purification evaluation value is less than the first preset water purification threshold of 0.55, the packing content of the aerobic unit 4 is reduced according to the difference between the water purification evaluation value and the first preset water purification threshold;

[0099] If the water purification evaluation value is greater than or equal to the first preset water purification threshold and less than the second preset water purification threshold of 0.95, the temperature of the aerobic treatment is increased according to the difference between the water purification evaluation value and the second preset water purification threshold;

[0100] If the water purification evaluation value is greater than or equal to the second preset water purification threshold, the duration of the aerobic treatment is increased according to the difference between the water purification evaluation value and the second preset water purification threshold.

[0101] The water purification evaluation value is the ratio of the water transmittance to the preset transmittance of 85%.

[0102] The water transmittance is obtained by a transmittance detection unit, and the transmittance detection unit is an optical transmittance meter.

[0103] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

[0104] The above are only the preferred embodiments of the present invention and are not used to limit the present invention; for those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An energy-efficient sewage treatment system based on power-off, characterized in that Comprising: A filtering unit for filtering sewage, including a grille installed inside at a preset inclination angle and a water inlet opened on the side wall; An anaerobic unit, which is communicated with the filtering unit through a first water pipe for anaerobic treatment of sewage; An anoxic unit, which is arranged below the anaerobic unit, communicated with the filtering unit through a second water pipe arranged on the side wall, and communicated with the anaerobic unit through a third water pipe arranged on the top for anoxic treatment of sewage; An aerobic unit, which is communicated with the anaerobic unit through a fourth water pipe and communicated with the anoxic unit through a fifth water pipe for aerobic treatment of sewage; A sludge sedimentation tank, which is communicated with the aerobic unit through a sixth water pipe, and an overflow port is arranged on the side wall of the sludge sedimentation tank; A clear water tank, which is communicated with the sludge sedimentation tank through a seventh water pipe for storing clear water, wherein the seventh water pipe is communicated with the overflow port; A data acquisition module, which includes an image acquisition unit arranged at the inlet of the first water pipe to obtain the gray value of sewage, a nitrogen concentration detection unit arranged in the anaerobic unit to obtain the nitrogen concentration of sewage, a dissolved oxygen concentration detection unit arranged at the inlet of the sixth water pipe to obtain the dissolved oxygen concentration, and a light transmittance detection unit arranged on the top of the aerobic unit to obtain the water body light transmittance of the aerobic unit; A control module, which is respectively connected with the data acquisition module and several solenoid valves, and is used to trigger a grille blockage warning or convey the filtered sewage to the anaerobic unit according to the comparison result between the average gray value of the sewage and the preset gray value, to determine whether to convey the anaerobically treated sewage to the aerobic unit or the anoxic unit according to the nitrogen concentration in the water body, and to determine whether the aerobic treatment of the sewage meets the preset standard according to the dissolved oxygen concentration.

2. The high-efficiency sewage treatment system based on power-off according to claim 1, characterized in that, The height of the first water pipe is not higher than the height of the water inlet, the height of the fourth water pipe is not higher than the height of the first water pipe, and the height of the fifth water pipe is not higher than the height of the second water pipe. Among them, solenoid valves are respectively arranged on the first water pipe, the second water pipe, the third water pipe, the fourth water pipe and the sixth water pipe.

3. The high-efficiency sewage treatment system based on non-powered according to claim 2, characterized in that, The control module determines whether the filtration of the sewage meets the preset standard according to the average gray value of the sewage, where If the average gray value is less than the first preset gray value, it is determined that the filtration of the sewage does not meet the preset standard, the grille is determined to be blocked and a warning is issued; If the average gray value is greater than or equal to the first preset gray value and less than the second preset gray value, it is determined that the filtration of the sewage does not meet the preset standard, and the filtration of the sewage is re-determined according to the filtration evaluation value of the sewage whether it meets the preset standard; If the average gray value is greater than or equal to the second preset gray value, it is determined that the filtration of the sewage meets the preset standard, and the solenoid valve on the second water pipe is opened to convey the filtered sewage to the anoxic unit; The average gray value is the arithmetic mean of the gray values of all pixels in the image of the sewage.

4. The high-efficiency sewage treatment system based on power-off according to claim 3, characterized in that, The control module conveys the filtered sewage to the anaerobic unit according to the comparison result between the filtration evaluation value and the preset filtration evaluation value, or reduces the grid bar spacing of the next batch. The filtering evaluation value is the variance of the sewage gray value.

5. The high-efficiency sewage treatment system based on power-free according to claim 4, wherein, The decreasing amplitude of the grid bar spacing is positively correlated with the filtering difference value, where the filtering difference value is the difference between the filtering evaluation value and the preset filtering evaluation value.

6. The high-efficiency sewage treatment system based on power-free according to claim 5, characterized in that, The control module conveys the anaerobically treated sewage to the aerobic unit or conveys the anaerobically treated sewage to the anoxic unit according to the comparison result of the nitrogen concentration in the water body and the preset nitrogen concentration in the water body; The nitrogen concentration in the water body is obtained by the nitrogen concentration detection unit.

7. The high-efficiency sewage treatment system based on power-free according to claim 6, characterized in that The control module determines that the aerobic treatment of the sewage does not meet the preset standard according to the comparison result that the dissolved oxygen concentration is less than the first preset dissolved oxygen concentration, and reduces the valve opening of the solenoid valve on the fourth water pipe according to the difference between the first preset dissolved oxygen concentration and the dissolved oxygen concentration; Moreover, the control module determines that the aerobic treatment of the sewage does not meet the preset standard according to the comparison result that the dissolved oxygen concentration is greater than or equal to the first preset dissolved oxygen concentration and less than the second preset dissolved oxygen concentration, and determines the adjustment strategy according to the water body purification evaluation value; The dissolved oxygen concentration is obtained by the dissolved oxygen concentration detection unit.

8. The high-efficiency sewage treatment system based on power-off according to claim 7, characterized in that, The control module responds to the dissolved oxygen concentration being greater than or equal to the second preset dissolved oxygen concentration, determines that the aerobic treatment of the sewage meets the preset standard, and opens the solenoid valve on the sixth water pipe to convey the aerobically treated sewage to the sludge sedimentation tank.

9. The high-efficiency sewage treatment system based on power-off according to claim 8, wherein The control module is provided with several valve opening reduction methods for reducing the valve opening of the solenoid valve on the fourth water pipe, and each valve opening reduction method has a different reduction amplitude for the valve opening.

10. The high-efficiency sewage treatment system based on power-free according to claim 9, characterized in that, The control module determines the adjustment strategy according to the water body purification evaluation value, where if the water body purification evaluation value is less than the first preset water body purification threshold, the filler content of the aerobic unit is reduced according to the difference between the water body purification evaluation value and the first preset water body purification threshold; if the water body purification evaluation value is greater than or equal to the first preset water body purification threshold and less than the second preset water body purification threshold, the temperature of the aerobic treatment is increased according to the difference between the water body purification evaluation value and the second preset water body purification threshold; if the water body purification evaluation value is greater than or equal to the second preset water body purification threshold, the duration of the aerobic treatment is increased according to the difference between the water body purification evaluation value and the second preset water body purification threshold; The water body purification evaluation value is the ratio of the water body light transmittance to the preset light transmittance.

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