Sewage treatment method and system

Abstract

The invention relates to the field of sewage treatment, in particular to a sewage treatment method and system.Circulating flow data of sewage in a primary tank is obtained and analyzed, and solid matter distribution of the sewage is determined, so that pretreatment of the sewage in the primary tank is adjusted; according to the water hardness of reclaimed water produced by the primary tank, the reclaimed water is shunted and conveyed to a plurality of softening tanks; dynamically adjusting the softened water input state of the aeration tank according to the dissolved state of oxygen in the aeration tank, and extracting and outputting oxygenated water from the aeration tank in different regions; and adjusting operation parameters of the reverse osmosis tank according to the change trend of water quality characteristics in the reverse osmosis tank so as to produce purified water. All procedures in the whole sewage treatment process can be comprehensively improved, it is ensured that corresponding types of pollutants can be efficiently purified and removed in each procedure, and the sewage treatment efficiency, the purified water recovery rate and the water quality are improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and more particularly to a wastewater treatment method and system. Background Technology

[0002] With urban and industrial development, wastewater discharge is rapidly increasing. Wastewater treatment has become a crucial means of water resource recycling and preventing the spread of water pollution. Wastewater from different environments has varying compositions, requiring multiple methods to work together for thorough purification. Currently, wastewater treatment methods mainly include sludge filtration, microbial decomposition, and filtration of soluble harmful substances. Wastewater treatment involves numerous steps, and the implementation of these steps directly affects wastewater treatment efficiency and purified water recovery rate. Existing technologies typically optimize and improve single steps, which can only guarantee the purification of certain types of pollutants in the wastewater, failing to achieve complete purification of the entire wastewater system and thus unable to guarantee the quality of the treated water. Therefore, how to coordinate and control all wastewater treatment processes is of great significance for improving wastewater treatment efficiency, purified water recovery rate, and water quality. Summary of the Invention

[0003] Considering that the entire wastewater treatment process involves steps targeting different types of pollutants, adjusting and controlling only some of the processes cannot completely purify and remove all pollutants from the wastewater, reducing wastewater treatment efficiency and failing to improve the quality of the final purified water. To comprehensively improve all steps in the entire wastewater treatment process, ensuring that each step can efficiently purify and remove the corresponding type of pollutants, thereby improving wastewater treatment efficiency, purified water recovery rate, and water quality, this invention provides a wastewater treatment method, which includes the following steps: S100: Acquire and analyze the circulation flow data of wastewater in the primary tank to determine the solid matter distribution of the wastewater; adjust the pretreatment of the wastewater in the primary tank according to the solid matter distribution; S200: Detect the hardness of the water produced in the primary tank, and then distribute the water to several softening tanks; collect at least a portion of the softened water produced in each softening tank according to the actual softening status of the water in each softening tank. S300: Dynamically adjust the input state of softened water to the aeration tank according to the oxygen dissolution state in the aeration tank; extract and output oxygenated water from different areas of the aeration tank according to the spatial distribution of dissolved oxygen in the aeration tank. S400: Obtain the water quality characteristics change trend of the oxygenated water during the reverse osmosis tank treatment, and adjust the operating parameters of the reverse osmosis tank according to the water quality characteristics change trend to produce purified water.

[0004] Preferably, in S100, the circulating flow data of wastewater in the primary tank is acquired and analyzed to determine the solid matter distribution of the wastewater; based on the solid matter distribution, the pretreatment of the wastewater in the primary tank is adjusted, specifically as follows: Visual identification of wastewater in the primary tank yields the spatial distribution of solid particle size within the wastewater; distributed flow detection of wastewater in the primary tank yields the spatial distribution of flow velocity of the wastewater. The spatial distribution of solid particle size and the spatial distribution of flow velocity are fused and mapped onto the internal space of the primary tank to determine the spatial variation trend of solid particles of different sizes in the primary tank; based on the spatial variation trend of the movement space, the wastewater filtration pretreatment in different areas of the primary tank is adjusted; wherein, adjusting the wastewater filtration pretreatment includes changing the filtration pore size of wastewater in different areas.

[0005] Preferably, in step S200, the hardness of the water produced from the primary tank is detected, and the water is then diverted and transported to several softening tanks. Based on the actual softening status of the water in each softening tank, at least a portion of the softened water produced from each softening tank is collected, specifically: The greywater produced by the primary tank is dynamically monitored to obtain the water hardness of the greywater produced by the primary tank in different time intervals; based on the water hardness of the greywater produced in each time interval and the adsorption hardness of the cation exchange resin in each of the several softening tanks, the greywater produced in each time interval is diverted and transported to the corresponding softening tank. Dynamic water hardness testing is performed on the water in each softening tank to obtain the water hardness change trend of the water in each softening tank; based on the water hardness change trend, softened water produced by the softening tank that can complete the water softening treatment within the expected time range is collected.

[0006] Preferably, in S300, the input state of softened water to the aeration tank is dynamically adjusted according to the dissolved oxygen state in the aeration tank; and oxygenated water is extracted and output from different areas of the aeration tank according to the spatial distribution of dissolved oxygen in the aeration tank, specifically as follows: The real-time oxygen input and softened water input in the aeration tank are obtained, and the real-time oxygen input and softened water input are fused and analyzed to estimate the oxygen dissolution efficiency in the aeration tank; wherein, the oxygen dissolution efficiency refers to the volume of oxygen dissolved into the softened water per unit time in the aeration tank; based on the oxygen dissolution efficiency, the softened water input flow rate to the aeration tank is dynamically adjusted. The spatial distribution of dissolved oxygen concentration in the aeration tank is obtained to determine the dissolved oxygen saturation area in the aeration tank; based on the location of the dissolved oxygen saturation area, oxygenated water is extracted and output from the aeration tank in different areas.

[0007] Preferably, in step S400, the water quality characteristics change trend of the oxygenated water during the reverse osmosis tank treatment is obtained, and the operating parameters of the reverse osmosis tank are adjusted according to the water quality characteristics change trend to produce purified water, specifically as follows: The conductivity of the oxygenated water is measured during the reverse osmosis treatment process to obtain the conductivity change trend of the oxygenated water; based on the conductivity change trend, it is determined whether the reverse osmosis tank is in a stable reverse osmosis effluent state. When the reverse osmosis tank is in a stable reverse osmosis effluent state, the operating pressure of the reverse osmosis tank is gradually increased to produce purified water; when the reverse osmosis tank is not in a stable reverse osmosis effluent state, the current operating pressure of the reverse osmosis tank is kept unchanged.

[0008] On the other hand, the present invention provides a wastewater treatment system, the system comprising the following modules: The material distribution identification module is used to acquire and analyze the circulation flow data of wastewater in the primary tank to determine the solid material distribution of the wastewater. A pretreatment adjustment module is used to adjust the pretreatment of the wastewater in the primary tank according to the distribution of the solid matter. The diversion module is used to detect the hardness of the water produced by the primary tank and then divert the water to several softening tanks. The softened water collection module is used to collect at least a portion of the softened water produced by each softening tank based on the actual softening status of the water in each softening tank. The water input adjustment module is used to dynamically adjust the softened water input state to the aeration tank according to the oxygen dissolution state in the aeration tank. The regional extraction module is used to extract and output oxygenated water from different regions of the aeration tank according to the spatial distribution of dissolved oxygen in the aeration tank. The water quality change trend determination module is used to obtain the water quality characteristic change trend of the oxygenated water during the reverse osmosis tank treatment. The reverse osmosis adjustment module is used to adjust the operating parameters of the reverse osmosis tank according to the changing trend of the water quality characteristics, so as to produce purified water.

[0009] Preferably, the material distribution identification module is used to acquire and analyze the circulating flow data of wastewater in the primary tank to determine the solid material distribution of the wastewater, specifically: Visual identification of wastewater in the primary tank yields the spatial distribution of solid particle size within the wastewater; distributed flow detection of wastewater in the primary tank yields the spatial distribution of flow velocity of the wastewater. The spatial distribution of solid particle size and the spatial distribution of flow velocity are fused and mapped onto the internal space of the primary pool to determine the spatial variation trend of solid particles of different sizes in the primary pool. The pretreatment adjustment module is used to adjust the pretreatment of the wastewater in the primary tank according to the distribution of the solid matter, specifically as follows: Based on the changing trend of the movement space, the wastewater filtration pretreatment in different areas of the primary tank is adjusted; wherein, adjusting the wastewater filtration pretreatment includes changing the pore size of the filter for wastewater in different areas.

[0010] Preferably, the diversion module is used to detect the water hardness of the water produced from the primary tank, and thereby diverts the water to several softening tanks, specifically: The greywater produced by the primary tank is dynamically monitored to obtain the water hardness of the greywater produced by the primary tank in different time intervals; based on the water hardness of the greywater produced in each time interval and the adsorption hardness of the cation exchange resin in each of the several softening tanks, the greywater produced in each time interval is diverted and transported to the corresponding softening tank. The softened water collection module is used to collect at least a portion of the softened water produced by each softening tank based on the actual softening status of the water in each softening tank, specifically: Dynamic water hardness testing is performed on the water in each softening tank to obtain the water hardness change trend of the water in each softening tank; based on the water hardness change trend, softened water produced by the softening tank that can complete the water softening treatment within the expected time range is collected.

[0011] Preferably, the water input adjustment module is used to dynamically adjust the softened water input state to the aeration tank according to the oxygen dissolution state in the aeration tank, specifically as follows: The real-time oxygen input and softened water input in the aeration tank are obtained, and the real-time oxygen input and softened water input are fused and analyzed to estimate the oxygen dissolution efficiency in the aeration tank; wherein, the oxygen dissolution efficiency refers to the volume of oxygen dissolved into the softened water per unit time in the aeration tank; based on the oxygen dissolution efficiency, the softened water input flow rate to the aeration tank is dynamically adjusted. The regional extraction module is used to extract and output oxygenated water from different regions of the aeration tank according to the spatial distribution of dissolved oxygen within the aeration tank. Specifically: The spatial distribution of dissolved oxygen concentration in the aeration tank is obtained to determine the dissolved oxygen saturation area in the aeration tank; based on the location of the dissolved oxygen saturation area, oxygenated water is extracted and output from the aeration tank in different areas.

[0012] Preferably, the reverse osmosis adjustment module is used to acquire the water quality characteristic change trend of the oxygenated water during the reverse osmosis tank treatment, and adjust the operating parameters of the reverse osmosis tank according to the water quality characteristic change trend to produce purified water, specifically: The conductivity of the oxygenated water is measured during the reverse osmosis treatment process to obtain the conductivity change trend of the oxygenated water; based on the conductivity change trend, it is determined whether the reverse osmosis tank is in a stable reverse osmosis effluent state. When the reverse osmosis tank is in a stable reverse osmosis effluent state, the operating pressure of the reverse osmosis tank is gradually increased to produce purified water; when the reverse osmosis tank is not in a stable reverse osmosis effluent state, the current operating pressure of the reverse osmosis tank is kept unchanged.

[0013] Compared with the prior art, the present invention has the following beneficial effects: Data on the circulation and flow of wastewater in the primary tank are acquired and analyzed to determine the distribution of solid matter in the wastewater. Based on this solid matter distribution, the pretreatment process in the primary tank is adjusted. Through this process, the primary tank treatment stage comprehensively detects solid pollutants of different particle sizes that may exist in the wastewater, accurately pinpointing the movement and diffusion trends of solid pollutants while the wastewater is in a flowing state. This allows for the selection of a suitable filtration pretreatment method to improve the filtration efficiency of solid pollutants.

[0014] The hardness of the reclaimed water produced from the primary tank is measured, and the reclaimed water is then diverted to several softening tanks. Based on the softening status of the reclaimed water in each softening tank, at least a portion of the softened water produced from each softening tank is collected. Through this process, the hardness of the reclaimed water produced from the primary tank is dynamically differentiated, providing a suitable softening environment for the reclaimed water produced at different times, thus achieving effective softening of all reclaimed water.

[0015] Based on the oxygen dissolution status within the aeration tank, the input of softened water to the aeration tank is dynamically adjusted; based on the spatial distribution of dissolved oxygen within the aeration tank, oxygenated water is extracted and output from different areas of the aeration tank. Through this process, the flow rates of softened water and oxygen input to the aeration tank are coordinated, improving the oxygen dissolution efficiency in the softened water, ensuring sufficient aeration treatment of the softened water, and enhancing the oxidation and decomposition efficiency of organic matter within the softened water.

[0016] The process involves acquiring the changing trends of oxygenated water characteristics during reverse osmosis treatment, and adjusting the operating parameters of the reverse osmosis tank based on these trends to produce purified water. Through this process, the changes in water quality characteristics during reverse osmosis tank operation are dynamically monitored, and the operating parameters are adaptively adjusted to balance reducing the tank's operating power with improving reverse osmosis effluent efficiency and water quality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a flowchart of a wastewater treatment method provided by the present invention.

[0018] Figure 2 It is a diagram of the entire wastewater treatment process.

[0019] Figure 3 It refers to the spatial distribution of solid materials of different particle sizes within the primary pool.

[0020] Figure 4 It shows the trend of water hardness changes in the softening tank.

[0021] Figure 5 This is a structural diagram of an aeration tank.

[0022] Figure 6 It shows the trend of conductivity changes in the oxygenated water within the reverse osmosis tank.

[0023] Figure 7 This is a structural diagram of a wastewater treatment system provided by the present invention. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining the present invention and not for limiting the present invention. Furthermore, it should be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, not all structures. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0025] The terms "comprising" and "having," and any variations thereof, used in this invention are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0026] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] Please see Figure 1 As shown, the present invention provides a wastewater treatment method, which includes the following steps: S100: Acquire and analyze the circulation flow data of wastewater in the primary tank to determine the solid matter distribution of the wastewater; adjust the pretreatment of wastewater in the primary tank according to the solid matter distribution.

[0028] Further, in S100, the circulating flow data of wastewater in the primary tank is acquired and analyzed to determine the solid matter distribution of the wastewater; based on the solid matter distribution, the pretreatment of the wastewater in the primary tank is adjusted, specifically as follows: Visual identification of wastewater in the primary tank yields the spatial distribution of solid particle size within the wastewater; distributed detection of wastewater flow in the primary tank yields the spatial distribution of wastewater flow velocity. The spatial distribution of solid particle size and flow velocity is integrated and mapped onto the internal space of the primary tank to determine the spatial variation trend of solid particles of different sizes in the primary tank. Based on the spatial variation trend, the wastewater filtration pretreatment in different areas of the primary tank is adjusted. The adjustment of wastewater filtration pretreatment includes changing the pore size of the filter for wastewater in different areas.

[0029] Please see Figure 2The wastewater treatment process of this invention mainly includes solid matter filtration, water softening, aeration, and reverse osmosis. These four treatment steps are implemented through a primary tank, a softening tank, an aeration tank, and a reverse osmosis tank, respectively. The primary tank is connected to the wastewater source, and wastewater from the source is transported to the primary tank. The wastewater contains solid matter such as sludge, which moves and diffuses within the primary tank. These solid matter has different particle sizes. If a single-pore size filter or other filtration device is used to filter the wastewater as a whole in the primary tank, smaller particles may not be accurately and thoroughly filtered. To achieve precise solid impurity filtration in different areas of the primary tank, the wastewater is subjected to full-range visual identification to obtain the spatial distribution of solid matter particle sizes within the wastewater (i.e., the spatial distribution of solid matter with different particle sizes across the entire wastewater). Furthermore, the wastewater in the primary tank is in a continuous flow state. This flow causes solid matter to move synchronously, resulting in the diffusion of solid matter with different particle sizes within the primary tank. Solid matter with the same or similar particle sizes tends to concentrate in corresponding areas of the primary tank; for example, larger particles tend to concentrate at the bottom, while smaller particles tend to concentrate at the top. Figure 3 It is evident that the solid particles with larger diameters are concentrated in the region closer to the bottom of the primary tank. Therefore, the spatial distribution of solid particle size and the spatial distribution of flow velocity are integrated and mapped onto the internal space of the primary tank to determine the spatial variation trend of solid particles of different sizes within the primary tank, thereby accurately characterizing the dynamic distribution of solid particles across the entire primary tank. Based on this spatial variation trend, the filtration pore size for different areas of wastewater is adjusted, for example, by using filter screens with different pore sizes in different areas of the primary tank. This achieves precise and efficient solid particle filtration of the wastewater across the entire primary tank, reducing wastewater turbidity.

[0030] S200: Detects the hardness of the water produced in the primary tank and distributes the water to several softening tanks accordingly; collects at least a portion of the softened water produced in each softening tank based on the actual softening status of the water in each softening tank.

[0031] Furthermore, in S200, the hardness of the greywater produced in the primary tank is detected, and the greywater is then diverted to several softening tanks. Based on the actual softening status of the greywater in each softening tank, at least a portion of the softened water produced in each softening tank is collected, specifically: The reclaimed water produced by the primary tank is dynamically monitored to obtain the water hardness of the reclaimed water produced by the primary tank in different time intervals. Based on the water hardness of the reclaimed water produced in each time interval and the adsorption hardness of the cation exchange resin in each softening tank, the reclaimed water produced in each time interval is diverted and transported to the corresponding softening tank. Dynamic water hardness testing was performed on the water in each softening tank to obtain the trend of water hardness change in each softening tank; based on the trend of water hardness change, softened water produced by the softening tank that can complete the water softening treatment within the expected time range was collected.

[0032] Water hardness primarily depends on the concentration of magnesium and / or calcium ions; higher concentrations result in higher hardness. After pre-treatment filtration in the primary tank, wastewater produces greywater containing significant amounts of magnesium and / or calcium ions. The concentrations of magnesium and / or calcium ions in the greywater output from the primary tank vary at different times, leading to variations in water hardness. Weakly acidic cation exchange resins exhibit high adsorption efficiency for both magnesium and calcium ions. This invention reduces the hardness of greywater by using a weakly acidic cation exchange resin within the softening tank to adsorb magnesium and calcium ions from the input greywater. During the adsorption of magnesium and calcium ions in the greywater, the weakly acidic cation exchange resin gradually reaches cation adsorption saturation. Once saturated, it can no longer absorb magnesium and calcium ions from the greywater.

[0033] The above analysis shows that the hardness of the reclaimed water produced from the primary tank varies in different time periods, and that the weakly acidic cation exchange resin itself has an upper limit for the absorption of magnesium and calcium ions. To ensure that the reclaimed water undergoes efficient softening treatment in the softening tank, the hardness of the reclaimed water produced from the primary tank is dynamically monitored in different time periods. Then, based on the adsorption hardness of the cation exchange resin in each softening tank (i.e., the amount of cations already absorbed by the cation exchange resin), the remaining amount of cations that the cation exchange resin in each softening tank can absorb is determined. The hardness of the reclaimed water produced in each time period is then compared with the amount of cations that the cation exchange resin in each softening tank can still absorb. The reclaimed water produced in each time period is then diverted to the corresponding softening tank, ensuring that the reclaimed water with higher hardness produced in the corresponding time period is preferentially diverted to the softening tank containing the cation exchange resin with a higher amount of cations that can still absorb, thus making full use of the cation adsorption capacity of the cation exchange resin in all softening tanks.

[0034] Please see Figure 4As the softening tank continuously receives new reclaimed water, the amount of magnesium and calcium ions adsorbed by the cation exchange resin gradually increases, and the hardness of the reclaimed water in the softening tank gradually decreases. When the hardness of the reclaimed water decreases to a certain threshold, the water softening treatment can be considered complete. At this point, the softened water in the softening tank should be output to the aeration tank for further treatment. To ensure the thoroughness of the water softening treatment in the softening tank, dynamic hardness testing is performed on the reclaimed water in each softening tank to obtain the hardness change trend of the reclaimed water in each softening tank. Based on the hardness change trend, it is determined whether the hardness has decreased to a certain threshold within the expected time range. If so, the softened water in the corresponding softening tank is collected and output to the aeration tank to improve the working efficiency and output of the softening tank.

[0035] S300: Dynamically adjusts the input of softened water to the aeration tank based on the dissolved oxygen state in the aeration tank; extracts and outputs oxygenated water from different areas of the aeration tank based on the spatial distribution of dissolved oxygen in the aeration tank.

[0036] Furthermore, in S300, the input state of softened water to the aeration tank is dynamically adjusted according to the dissolved oxygen state within the aeration tank; and oxygenated water is extracted and output from different areas of the aeration tank according to the spatial distribution of dissolved oxygen within the aeration tank, specifically as follows: The real-time oxygen input and softened water input in the aeration tank are obtained, and the real-time oxygen input and softened water input are fused and analyzed to estimate the oxygen dissolution efficiency in the aeration tank. The oxygen dissolution efficiency refers to the volume of oxygen dissolved into the softened water in the aeration tank per unit time. Based on the oxygen dissolution efficiency, the softened water input flow rate to the aeration tank is dynamically adjusted. Obtain the spatial distribution of dissolved oxygen concentration in the aeration tank to determine the dissolved oxygen saturation zone; based on the location of the dissolved oxygen saturation zone, extract and output oxygenated water from the aeration tank in different zones.

[0037] Please see Figure 5The softened water from the softening tank is pumped to the aeration tank. The aeration pump is connected to an oxygen output head, located at the bottom of the aeration tank, which pumps high-pressure oxygen. Simultaneously, the aeration tank is equipped with a movable pump head and a dissolved oxygen sensor. The pump head can extract oxygenated water from different depths within the aeration tank, and the dissolved oxygen sensor detects the dissolved oxygen concentration at different depths. Both the pump and the dissolved oxygen sensor are connected to a controller. Based on the dissolved oxygen concentration reading from the sensor, the controller determines whether the water at the sensor's current depth is saturated. If so, the controller moves the pump head to the designated depth and drives the pump to extract oxygenated water from different areas of the aeration tank. Furthermore, softened water is continuously fed from the softening tank to the aeration tank. In order to ensure that the newly added softened water can dissolve oxygen in the aeration tank in a timely and sufficient manner, the real-time oxygen input and real-time softened water input in the aeration tank are first obtained. The real-time oxygen input and real-time softened water input are then analyzed to estimate the volume of oxygen dissolved in the softened water per unit time in the aeration tank. Based on this, the flow rate of softened water input to the aeration tank is dynamically adjusted to ensure that there is always sufficient oxygen dissolved in the newly added softened water in the aeration tank.

[0038] S400: Acquires the water quality characteristics change trend of oxygenated water during reverse osmosis treatment, and adjusts the operating parameters of the reverse osmosis tank according to the water quality characteristics change trend to produce purified water.

[0039] Furthermore, in S400, the water quality characteristics change trend of the oxygenated water during the reverse osmosis tank treatment is obtained. Based on the water quality characteristic change trend, the operating parameters of the reverse osmosis tank are adjusted to produce purified water. Specifically: Conductivity of the oxygenated water was measured during the reverse osmosis treatment process to obtain the conductivity trend. Based on the conductivity trend, it was determined whether the reverse osmosis tank was in a stable reverse osmosis effluent state. When the reverse osmosis tank is in a stable reverse osmosis effluent state, the operating pressure of the reverse osmosis tank is gradually increased to produce purified water; when the reverse osmosis tank is not in a stable reverse osmosis effluent state, the current operating pressure of the reverse osmosis tank is kept unchanged.

[0040] Reverse osmosis (RO) tanks treat oxygenated water using reverse osmosis technology, thereby reducing ionic impurities in the oxygenated water. As the concentration of ionic impurities in the oxygenated water decreases, its conductivity also decreases accordingly. The stability of the reverse osmosis effluent state within the RO tank affects the conductivity trend of the oxygenated water. Please refer to [link / reference]. Figure 6If the conductivity of the oxygenated water shows a stable, gradually decreasing trend, then the reverse osmosis tank is determined to be in a stable reverse osmosis effluent state; otherwise, the reverse osmosis tank is determined to be in an unstable reverse osmosis effluent state. When the reverse osmosis tank is in a stable reverse osmosis effluent state, the operating pressure of the reverse osmosis tank is gradually increased to produce purified water; when the reverse osmosis tank is not in a stable reverse osmosis effluent state, the current operating pressure of the reverse osmosis tank is kept constant, which can improve the reverse osmosis effluent efficiency and water quality.

[0041] Please see Figure 7 As shown, the present invention provides a wastewater treatment system, which includes the following modules: The material distribution identification module is used to acquire and analyze the circulation flow data of wastewater in the primary tank to determine the solid material distribution of the wastewater. The pretreatment adjustment module is used to adjust the pretreatment of wastewater in the primary tank according to the distribution of solid matter. The diversion module is used to detect the hardness of the water produced by the primary tank and then divert the water to several softening tanks. The softened water collection module is used to collect at least a portion of the softened water produced by each softening tank based on the actual softening status of the water in each softening tank. The water input adjustment module is used to dynamically adjust the input of softened water to the aeration tank based on the oxygen dissolution status in the aeration tank. The regional extraction module is used to extract and output oxygenated water from different regions of the aeration tank according to the spatial distribution of dissolved oxygen in the aeration tank. The water quality change trend determination module is used to obtain the water quality characteristics change trend of oxygenated water during the reverse osmosis tank treatment. The reverse osmosis adjustment module is used to adjust the operating parameters of the reverse osmosis tank according to the changing trend of water quality characteristics, thereby producing purified water.

[0042] Furthermore, the material distribution identification module is used to acquire and analyze the circulating flow data of wastewater in the primary tank to determine the solid material distribution of the wastewater, specifically: Visual identification of wastewater in the primary tank yields the spatial distribution of solid particle size within the wastewater; distributed detection of wastewater flow in the primary tank yields the spatial distribution of wastewater flow velocity. By integrating and mapping the spatial distribution of solid particle size and flow velocity onto the internal space of the primary pool, the spatial variation trend of solid particles of different sizes in the primary pool can be determined. The pretreatment adjustment module is used to adjust the pretreatment of wastewater in the primary tank according to the distribution of solid matter, specifically: Based on the changing trends of the movement space, the wastewater filtration pretreatment in different areas of the primary tank is adjusted; among which, adjusting the wastewater filtration pretreatment includes changing the pore size of the wastewater in different areas.

[0043] Furthermore, the diversion module is used to detect the hardness of the water produced from the primary tank, thereby diverting the water to several softening tanks, specifically: The reclaimed water produced by the primary tank is dynamically monitored to obtain the water hardness of the reclaimed water produced by the primary tank in different time intervals. Based on the water hardness of the reclaimed water produced in each time interval and the adsorption hardness of the cation exchange resin in each softening tank, the reclaimed water produced in each time interval is diverted and transported to the corresponding softening tank. The softened water collection module is used to collect at least a portion of the softened water produced by each softening tank, based on the actual softening status of the water in each softening tank. Specifically: Dynamic water hardness testing was performed on the water in each softening tank to obtain the trend of water hardness change in each softening tank; based on the trend of water hardness change, softened water produced by the softening tank that can complete the water softening treatment within the expected time range was collected.

[0044] Furthermore, the water input adjustment module is used to dynamically adjust the input of softened water to the aeration tank based on the oxygen dissolution status within the aeration tank, specifically as follows: The real-time oxygen input and softened water input in the aeration tank are obtained, and the real-time oxygen input and softened water input are fused and analyzed to estimate the oxygen dissolution efficiency in the aeration tank. The oxygen dissolution efficiency refers to the volume of oxygen dissolved into the softened water in the aeration tank per unit time. Based on the oxygen dissolution efficiency, the softened water input flow rate to the aeration tank is dynamically adjusted. The zoned extraction module is used to extract and output oxygenated water from different zones within the aeration tank based on the spatial distribution of dissolved oxygen. Specifically: Obtain the spatial distribution of dissolved oxygen concentration in the aeration tank to determine the dissolved oxygen saturation zone; based on the location of the dissolved oxygen saturation zone, extract and output oxygenated water from the aeration tank in different zones.

[0045] Furthermore, the reverse osmosis adjustment module is used to acquire the water quality characteristics change trend of the oxygenated water during the reverse osmosis tank treatment, and adjust the operating parameters of the reverse osmosis tank according to the water quality characteristics change trend, thereby producing purified water, specifically: Conductivity of the oxygenated water was measured during the reverse osmosis treatment process to obtain the conductivity trend. Based on the conductivity trend, it was determined whether the reverse osmosis tank was in a stable reverse osmosis effluent state. When the reverse osmosis tank is in a stable reverse osmosis effluent state, the operating pressure of the reverse osmosis tank is gradually increased to produce purified water; when the reverse osmosis tank is not in a stable reverse osmosis effluent state, the current operating pressure of the reverse osmosis tank is kept unchanged.

[0046] The operation and effects of the wastewater treatment system of the present invention are consistent with those of the wastewater treatment method described above, and the wastewater treatment system will not be described again here.

[0047] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of a necessary general-purpose hardware platform, or by a combination of hardware and software. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a computer product. The present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Other embodiments may also be used. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wastewater treatment method, characterized in that, The method includes the following steps: S100: Acquire and analyze the circulation flow data of wastewater in the primary tank to determine the solid matter distribution of the wastewater; adjust the pretreatment of the wastewater in the primary tank according to the solid matter distribution; S200: Detect the hardness of the water produced in the primary tank, and then distribute the water to several softening tanks; collect at least a portion of the softened water produced in each softening tank according to the actual softening status of the water in each softening tank. S300: Dynamically adjust the input state of softened water to the aeration tank according to the oxygen dissolution state in the aeration tank; extract and output oxygenated water from different areas of the aeration tank according to the spatial distribution of dissolved oxygen in the aeration tank. S400: Obtain the water quality characteristics change trend of the oxygenated water during the reverse osmosis tank treatment, and adjust the operating parameters of the reverse osmosis tank according to the water quality characteristics change trend to produce purified water.

2. The method according to claim 1, characterized in that, In step S100, the circulating flow data of wastewater in the primary tank is acquired and analyzed to determine the solid matter distribution of the wastewater; based on the solid matter distribution, the pretreatment of the wastewater in the primary tank is adjusted, specifically as follows: Visual identification of wastewater in the primary tank yields the spatial distribution of solid particle size within the wastewater; distributed flow detection of wastewater in the primary tank yields the spatial distribution of flow velocity of the wastewater. The spatial distribution of solid particle size and the spatial distribution of flow velocity are fused and mapped onto the internal space of the primary tank to determine the spatial variation trend of solid particles of different sizes in the primary tank; based on the spatial variation trend of the movement space, the wastewater filtration pretreatment in different areas of the primary tank is adjusted; wherein, adjusting the wastewater filtration pretreatment includes changing the filtration pore size of wastewater in different areas.

3. The method according to claim 1, characterized in that, In S200, the hardness of the water produced from the primary tank is detected, and the water is then diverted to several softening tanks. Based on the softening status of the water in each softening tank, at least a portion of the softened water produced from each softening tank is collected, specifically: The greywater produced by the primary tank is dynamically monitored to obtain the water hardness of the greywater produced by the primary tank in different time intervals; based on the water hardness of the greywater produced in each time interval and the adsorption hardness of the cation exchange resin in each of the several softening tanks, the greywater produced in each time interval is diverted and transported to the corresponding softening tank. Dynamic water hardness testing was performed on the water in each softening tank to obtain the trend of water hardness change in each softening tank. Based on the trend of water hardness change, the softened water produced by the softening tank that can complete the water softening treatment within the expected time range is collected.

4. The method according to claim 1, characterized in that, In S300, the input state of softened water to the aeration tank is dynamically adjusted according to the dissolved oxygen state in the aeration tank; and oxygenated water is extracted and output from different areas of the aeration tank according to the spatial distribution of dissolved oxygen in the aeration tank, specifically: The real-time oxygen input and softened water input in the aeration tank are obtained, and the real-time oxygen input and softened water input are fused and analyzed to estimate the oxygen dissolution efficiency in the aeration tank; wherein, the oxygen dissolution efficiency refers to the volume of oxygen dissolved into the softened water per unit time in the aeration tank; based on the oxygen dissolution efficiency, the softened water input flow rate to the aeration tank is dynamically adjusted. The spatial distribution of dissolved oxygen concentration in the aeration tank is obtained to determine the dissolved oxygen saturation area in the aeration tank; based on the location of the dissolved oxygen saturation area, oxygenated water is extracted and output from the aeration tank in different areas.

5. The method according to claim 1, characterized in that, In step S400, the water quality characteristics change trend of the oxygenated water during the reverse osmosis tank treatment is obtained. Based on the water quality characteristics change trend, the operating parameters of the reverse osmosis tank are adjusted to produce purified water. Specifically: The conductivity of the oxygenated water is measured during the reverse osmosis treatment process to obtain the conductivity change trend of the oxygenated water; based on the conductivity change trend, it is determined whether the reverse osmosis tank is in a stable reverse osmosis effluent state. When the reverse osmosis tank is in a stable reverse osmosis effluent state, the operating pressure of the reverse osmosis tank is gradually increased to produce purified water; when the reverse osmosis tank is not in a stable reverse osmosis effluent state, the current operating pressure of the reverse osmosis tank is kept unchanged.

6. A wastewater treatment system, characterized in that, The system includes the following modules: The material distribution identification module is used to acquire and analyze the circulation flow data of wastewater in the primary tank to determine the solid material distribution of the wastewater. A pretreatment adjustment module is used to adjust the pretreatment of the wastewater in the primary tank according to the distribution of the solid matter. The diversion module is used to detect the hardness of the water produced by the primary tank and divert the water to several softening tanks. The softened water collection module is used to collect at least a portion of the softened water produced by each softening tank based on the actual softening status of the water in each softening tank. The water input adjustment module is used to dynamically adjust the softened water input state to the aeration tank according to the oxygen dissolution state in the aeration tank. The regional extraction module is used to extract and output oxygenated water from different regions of the aeration tank according to the spatial distribution of dissolved oxygen in the aeration tank. The water quality change trend determination module is used to obtain the water quality characteristic change trend of the oxygenated water during the reverse osmosis tank treatment. The reverse osmosis adjustment module is used to adjust the operating parameters of the reverse osmosis tank according to the changing trend of the water quality characteristics, so as to produce purified water.

7. The system according to claim 6, characterized in that, The material distribution identification module is used to acquire and analyze the circulating flow data of wastewater in the primary tank to determine the solid material distribution of the wastewater, specifically: Visual identification of wastewater in the primary tank yields the spatial distribution of solid particle size within the wastewater; distributed flow detection of wastewater in the primary tank yields the spatial distribution of flow velocity of the wastewater. The spatial distribution of solid particle size and the spatial distribution of flow velocity are fused and mapped onto the internal space of the primary pool to determine the spatial variation trend of solid particles of different sizes in the primary pool. The pretreatment adjustment module is used to adjust the pretreatment of the wastewater in the primary tank according to the distribution of the solid matter, specifically as follows: Based on the changing trend of the movement space, the wastewater filtration pretreatment in different areas of the primary tank is adjusted; wherein, adjusting the wastewater filtration pretreatment includes changing the pore size of the wastewater in different areas.

8. The system according to claim 6, characterized in that, The diversion module is used to detect the hardness of the water produced from the primary tank, and thereby diverts the water to several softening tanks. Specifically: The greywater produced by the primary tank is dynamically monitored to obtain the water hardness of the greywater produced by the primary tank in different time intervals; based on the water hardness of the greywater produced in each time interval and the adsorption hardness of the cation exchange resin in each of the several softening tanks, the greywater produced in each time interval is diverted and transported to the corresponding softening tank. The softened water collection module is used to collect at least a portion of the softened water produced by each softening tank based on the actual softening status of the water in each softening tank, specifically: Dynamic water hardness testing is performed on the water in each softening tank to obtain the water hardness change trend of the water in each softening tank; based on the water hardness change trend, softened water produced by the softening tank that can complete the water softening treatment within the expected time range is collected.

9. The system according to claim 6, characterized in that, The water input adjustment module is used to dynamically adjust the softened water input to the aeration tank according to the oxygen dissolution state in the aeration tank, specifically: The real-time oxygen input and softened water input in the aeration tank are obtained, and the real-time oxygen input and softened water input are fused and analyzed to estimate the oxygen dissolution efficiency in the aeration tank; wherein, the oxygen dissolution efficiency refers to the volume of oxygen dissolved into the softened water per unit time in the aeration tank; based on the oxygen dissolution efficiency, the softened water input flow rate to the aeration tank is dynamically adjusted. The regional extraction module is used to extract and output oxygenated water from different regions of the aeration tank according to the spatial distribution of dissolved oxygen within the aeration tank. Specifically: The spatial distribution of dissolved oxygen concentration in the aeration tank is obtained to determine the dissolved oxygen saturation area in the aeration tank; based on the location of the dissolved oxygen saturation area, oxygenated water is extracted and output from the aeration tank in different areas.

10. The system according to claim 6, characterized in that, The reverse osmosis adjustment module is used to acquire the water quality characteristic change trend of the oxygenated water during the reverse osmosis tank treatment, and adjust the operating parameters of the reverse osmosis tank according to the water quality characteristic change trend to produce purified water, specifically: The conductivity of the oxygenated water is measured during the reverse osmosis treatment process to obtain the conductivity change trend of the oxygenated water; based on the conductivity change trend, it is determined whether the reverse osmosis tank is in a stable reverse osmosis effluent state. When the reverse osmosis tank is in a stable reverse osmosis effluent state, the operating pressure of the reverse osmosis tank is gradually increased to produce purified water; when the reverse osmosis tank is not in a stable reverse osmosis effluent state, the current operating pressure of the reverse osmosis tank is kept unchanged.

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