A method and system for recycling and reusing pleurotus waste water

Abstract

The application discloses a pleurotus eryngii wastewater regeneration and recycling method and system, belongs to the field of wastewater treatment and resource recycling, and aims at solving the problems of intermittent discharge of pleurotus eryngii production wastewater, pollution load fluctuation and difficulty in stably meeting the health requirements of recycled water. The application realizes the technical effects of stable wastewater treatment, graded water supply and recycling through the following steps: collecting wastewater according to sources, separating coarse and fine solid-liquid, regulating and homogenizing in stages to cut peaks, linking biological treatment loads, deep disinfection, health determination of use and treatment of unqualified water.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment and resource reuse, and in particular to a method and system for the recycling of Pleurotus ostreatus wastewater. Background Technology

[0002] During the production of king oyster mushrooms, the washing of mushroom houses, cleaning of transfer baskets, post-harvest cleaning, and treatment of mushroom residue generate wastewater containing culture medium residue, soluble organic matter, suspended solids, and microorganisms. Existing treatment methods typically involve mixing wastewater from different sources and then using sedimentation, conventional biological treatment, and end-of-pipe disinfection, with the treatment unit operating under fixed conditions.

[0003] Because the production process is intermittent, the flow rate and chemical oxygen demand of wastewater from different sources fluctuate. Single sedimentation is difficult to continuously retain fine suspended solids, which can easily cause load shocks to subsequent biological treatment and lead to increased consumption of reagents and sludge production. At the same time, uniform disinfection without distinguishing uses cannot reliably meet different hygiene requirements such as post-harvest cleaning and turnover basket cleaning, resulting in a low reuse rate of reclaimed water.

[0004] Therefore, there is a need for a method and system for the recycling and reuse of Pleurotus ostreatus wastewater that can overcome the shortcomings of the existing technologies. Summary of the Invention

[0005] One objective of this invention is to propose a method and system for the recycling of king oyster mushroom wastewater. Addressing the problems of complex sources, intermittent drainage, and fluctuating chemical oxygen demand (COD) causing unstable treatment and insufficient sanitation grading of king oyster mushroom production wastewater, this invention proposes a technical solution involving source-based diversion, coarse and fine solid-liquid separation, graded regulation for homogenization and peak shaving, biological treatment load linkage, deep disinfection, and recirculation based on intended use. This achieves smooth treatment load, traceable sanitation assessment, graded supply of reclaimed water according to intended use, and closed-loop recirculation of substandard water.

[0006] This invention provides a method for regenerating and reusing wastewater from king oyster mushroom cultivation, comprising: S1, collecting wastewater from mushroom house rinsing, wastewater from turnover basket washing, post-harvest washing, and wastewater from mushroom residue treatment according to their respective sources, and sequentially performing coarse solid-liquid separation and fine solid-liquid separation on each source of wastewater to obtain separated effluent with source identification; S2, collecting the flow rate, chemical oxygen demand, and suspended solids detection results of the separated effluent, and introducing the separated effluent into the corresponding graded regulation unit for homogenization and peak reduction according to the source identification and detection results to obtain regulated effluent and its treatment load information; S3, adjusting the influent flow rate and treatment parameters of the biological treatment unit according to the treatment load information, and treating the separated effluent... S4. The effluent is adjusted and subjected to biological treatment to obtain biologically treated effluent; S5. The biologically treated effluent is deeply disinfected and the microbial indicators of the disinfected effluent are detected. The microbial indicators are compared with the preset sanitary thresholds corresponding to each reuse purpose to obtain a sanitary judgment result that includes the usable purpose; S6. According to the sanitary judgment result, the disinfected effluent that reaches the corresponding preset sanitary threshold is allocated to the corresponding mushroom house cleaning, turnover basket cleaning, post-harvest cleaning or substrate treatment stage, and the disinfected effluent that does not reach any of the preset sanitary thresholds is returned to the graded adjustment unit or the biological treatment unit to form a closed loop of wastewater treatment, sanitary judgment and recycling.

[0007] Optionally, S1 includes: Set up independent collection pipelines for wastewater from each source and generate source identifiers that include source type, collection period, and cumulative flow. After using a grid or drum screen to trap culture medium residue and bacterial residue, the remaining suspended matter is separated by a micro-sieve or air flotation. The solids obtained from coarse solid-liquid separation and the scum obtained from fine solid-liquid separation are then sent to the bacterial residue treatment stage.

[0008] Optionally, S2 includes: The controller sets chemical oxygen demand (COD) and suspended solids (SSO) boundaries based on the allowable influent load of the biological treatment unit and historical operating records, and compares the detection results of each separated effluent with the boundaries to determine the adjustment level. The separated effluent from different regulation levels is sent to the corresponding regulating tank according to the diversion ratio determined by the controller, and the bypass or the effluent pipeline of the regulating tank is switched according to the liquid level of the regulating tank and the effluent load status, so that the load of the mixed regulated effluent is within the allowable influent load.

[0009] Optionally, S3 includes: The biological treatment unit is sequentially configured with a hydrolysis acidification zone, a carrier biofilm aerobic zone, and a membrane separation zone. The controller adjusts the influent flow rate into the hydrolysis acidification zone, the aeration rate of the carrier biofilm aerobic zone, and the return flow rate of the membrane separation zone based on the flow rate, chemical oxygen demand load, and suspended solids load in the treatment load information, and uses the effluent from the membrane separation zone as the biological treatment effluent.

[0010] Optionally, S4 includes: The biologically treated effluent is sequentially subjected to precision filtration, ultraviolet irradiation, and sodium hypochlorite disinfection. The controller adjusts the ultraviolet irradiation dose and sodium hypochlorite dosage based on the suspended solids detection results of the disinfection influent and the microbial indicators of the disinfection effluent, and records the sampling time, disinfection operation status, microbial detection results and corresponding preset hygiene thresholds.

[0011] Optionally, S5 includes: The controller stores preset hygiene thresholds corresponding to the uses of mushroom house cleaning, turnover basket cleaning, post-harvest cleaning and substrate treatment, and sends the disinfected effluent into the reclaimed water tank and generates a use level label. Open the reuse distribution pipeline that matches the usage level identifier, and allocate the disinfected water that does not reach the preset sanitary threshold corresponding to the target usage but reaches the preset sanitary threshold corresponding to other usages only to the other usages, and isolate and recirculate the disinfected water that does not reach any preset sanitary threshold. Furthermore, the online monitoring unit collects flow rate, chemical oxygen demand, suspended solids and microbial detection data for each collection pipeline and treatment unit according to a preset sampling cycle; The controller generates a water quality change status based on the current detection data and the detection data of the previous sampling period, and adjusts the diversion ratio, influent volume, aeration volume, return flow, ultraviolet irradiation dose and sodium hypochlorite dosage in conjunction with the water quality change status, and writes the reason for the adjustment and the adjusted operating status into the operation record. Furthermore, when any online detection data is missing, exceeds the corresponding sensor range, or the deviation from the periodic retest result exceeds the preset verification boundary, the controller generates an abnormal detection state and triggers a safety interlock, stopping the water supply for post-harvest cleaning and turnover basket cleaning, and keeping the water to be judged in the reclaimed water tank or for return treatment. Once the retest result returns to the preset verification boundary and the hygiene judgment result reaches the corresponding preset hygiene threshold, the safety interlock is released and the corresponding reuse distribution pipeline is restored. Furthermore, the controller determines the water supply sequence based on the level of the reclaimed water tank, the water demand status of each reuse purpose, and the purpose level identification, and performs graded water supply through check valves and electrically controlled valves installed in each reuse distribution pipeline. When the level in the reclaimed water tank does not reach the preset water supply boundary or the application level label is inconsistent with the target application, the corresponding electrically controlled valve is closed and the reason for the supply stoppage is recorded to prevent backflow between pipelines of different applications and to prevent reclaimed water that does not meet the sanitary threshold of the target application from being supplied.

[0012] On the other hand, the present invention also provides a system for the recycling and reuse of king oyster mushroom wastewater, comprising: The diversion and solid-liquid separation module is used to collect wastewater according to its source and perform coarse solid-liquid separation and fine solid-liquid separation; the graded regulation module is used to homogenize and reduce peaks based on source identification and flow rate, chemical oxygen demand and suspended solids detection results; the biological treatment module is used to adjust the influent flow and treatment parameters according to the treatment load information and output biologically treated effluent; the deep disinfection and hygiene judgment module is used to perform deep disinfection on the biologically treated effluent and generate hygiene judgment results including usable uses; the reuse distribution and recirculation module is used to grade and supply disinfected effluent that has reached the corresponding preset hygiene threshold to the corresponding reuse uses and recirculate unqualified disinfected effluent for treatment; and the module includes an online monitoring unit, a controller, a reclaimed water tank, a recirculation pipeline and a reuse distribution pipeline, wherein the controller is communicatively connected to the actuators of each module, the online monitoring unit and each pipeline.

[0013] The beneficial effects of this invention are: 1. By diverting wastewater according to its source and performing coarse and fine solid-liquid separation, combined with the homogenization and peak shaving of the graded adjustment unit, the impact of intermittent drainage and fluctuations in chemical oxygen demand and suspended solids on subsequent treatment is reduced, thereby improving the stability of the treatment operation.

[0014] 2. By adjusting the influent flow, aeration flow and return flow of the biological treatment unit in conjunction with the flow rate, chemical oxygen demand and suspended solids detection results, and with deep disinfection, the consumption of chemicals and sludge caused by excessive fixed operation can be reduced.

[0015] 3. By establishing the relationship between microbial indicators and the sanitary threshold for different uses, reclaimed water is supplied in different grades to different cleaning and substrate treatment stages, and substandard water is returned for treatment, thereby improving the sanitary reliability and reuse rate of reclaimed water. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a flowchart of the method for regenerating and reusing wastewater from king oyster mushrooms according to the present invention.

[0017] Figure 2 This is a flowchart of the S4 deep disinfection and hygiene determination process of the present invention. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0019] refer to Figures 1-2A method for recycling and reusing wastewater from king oyster mushroom cultivation includes: S1, collecting wastewater from mushroom house rinsing, wastewater from turnover basket cleaning, post-harvest cleaning, and wastewater from mushroom residue treatment according to their respective sources, and sequentially performing coarse solid-liquid separation and fine solid-liquid separation on each source wastewater to obtain separated effluent with source identification; S2, collecting the flow rate, chemical oxygen demand, and suspended solids detection results of the separated effluent, and introducing the separated effluent into the corresponding graded regulation unit for homogenization and peak reduction according to the source identification and detection results to obtain regulated effluent and its treatment load information; S3, adjusting the influent flow rate and treatment parameters of the biological treatment unit according to the treatment load information, and adjusting the regulated effluent... S4. The effluent undergoes biological treatment to obtain biologically treated effluent; S5. The biologically treated effluent is deeply disinfected and the microbial indicators of the disinfected effluent are detected. The microbial indicators are compared with the preset sanitary thresholds corresponding to each reuse purpose to obtain a sanitary judgment result that includes the usable purpose; S6. According to the sanitary judgment result, the disinfected effluent that reaches the corresponding preset sanitary threshold is allocated to the corresponding mushroom house cleaning, turnover basket cleaning, post-harvest cleaning or substrate treatment stage, and the disinfected effluent that does not reach any of the preset sanitary thresholds is returned to the graded adjustment unit or the biological treatment unit, forming a closed loop of wastewater treatment, sanitary judgment and recycling.

[0020] In this specific embodiment, S1 includes: Wastewater from four sources—mushroom house rinsing, turnover basket washing, post-harvest washing, and mushroom residue treatment—is collected independently. Each source has its own separate collection pipeline and collection pool. The mushroom house rinsing wastewater enters the mushroom house rinsing collection pool, the turnover basket washing wastewater enters the turnover basket washing collection pool, the post-harvest washing wastewater enters the post-harvest washing collection pool, and the mushroom residue treatment wastewater enters the mushroom residue treatment collection pool. Each collection pipeline is equipped with an inlet electrically controlled valve, a flow meter, a sampling port, and a check valve sequentially along the water flow direction. The controller generates a source identifier for the wastewater source when the corresponding inlet electrically controlled valve is opened. The source identifier includes the source category, collection period, and cumulative flow. The source category is fixed to one of the four wastewater sources: mushroom house rinsing wastewater, turnover basket washing wastewater, post-harvest washing wastewater, and mushroom residue treatment wastewater. The collection period is determined by the start and end times of collection. The cumulative flow is obtained by integrating the instantaneous flow rate collected by the corresponding flow meter within the collection period. The calculation relationship is as follows: ,in, Indicates the source category is The cumulative flow of wastewater during the collection period. Indicates the category of wastewater source, and The values ​​are wastewater from mushroom house rinsing, wastewater from washing turnover baskets, post-harvest washing, or wastewater from mushroom residue treatment. Indicates the start time of collection. Indicates the end time of collection. Indicates the source category is Wastewater at all times Instantaneous flow rate Indicates any sampling time within the collection period; The effluent from each collection tank is pumped into the corresponding coarse solid-liquid separation equipment by a booster pump. The coarse solid-liquid separation equipment uses a drum screen with a screen slit width of 2.0 mm, which is used to intercept the residue of the king oyster mushroom culture medium, mushroom residue particles, mushroom body fragments and other large-diameter solids. The water inlet end of the drum screen is connected to the corresponding collection tank. The liquid under the drum screen enters the fine solid-liquid separation equipment, and the solids over the drum screen are transported to the mushroom residue treatment stage by a closed screw conveyor. The fine solid-liquid separation equipment employs a dissolved air flotation (DAF) device. The underflow from the drum screen enters the DAF contact zone and mixes with dissolved air water. The dissolved air water releases microbubbles that adhere to the remaining suspended solids and fine organic particles, causing them to float and form a scum layer. The scum scraping mechanism of the DAF device scrapes the scum into the scum tank according to the scraping cycle set by the controller. The effluent from the lower part of the DAF clarification zone is discharged as the separated effluent. The dissolved air pressure of the DAF device is set to 0.35 MPa, and the return water volume is set to the amount of water entering the DAF device. This ensures that fine suspended matter has stable conditions for floating and separation; The controller binds the separated water discharged from the air flotation clarification zone to its source identifier and delivers the separated water with the source identifier to the subsequent graded regulation unit. The separated water with the source identifier refers to the data record in the controller's operation record that simultaneously associates the source category, collection period, cumulative flow, and corresponding coarse solid-liquid separation and fine solid-liquid separation operation status. Both the solids obtained from coarse solid-liquid separation and the scum obtained from fine solid-liquid separation enter the mushroom residue treatment stage. The mushroom residue treatment stage includes draining, temporary storage, and mixing with king oyster mushroom residue. The drained liquid is returned to the mushroom residue treatment collection tank, and the solid material enters the subsequent mushroom residue resource utilization process. Thus, before entering the graded regulation unit, the independent collection of wastewater from different sources, source tracing, interception of coarse solids, removal of fine suspended solids, and recovery of solid by-products are completed.

[0021] In this specific embodiment, S2 includes: The system receives separated effluent with source identification. The staged regulation unit includes a primary regulation tank, a secondary regulation tank, a tertiary regulation tank, and a mixing well for the effluent. The effective volumes of the primary, secondary, and tertiary regulation tanks are respectively... and Each regulating tank is equipped with a level gauge, a stirrer, an inlet electric control valve, an outlet electric control valve, and an air drain valve. The regulating outlet mixing well is equipped with a flow meter, an online chemical oxygen demand (COD) analyzer, and an online suspended solids analyzer. The controller reads the source category, collection period and cumulative flow corresponding to each source identifier, and collects the current flow rate, chemical oxygen demand (COD) detection results and suspended solids detection results of the separated water according to a 5-minute sampling cycle. The online COD detector uses dichromate digestion colorimetric detection method, and the online suspended solids detector uses light scattering detection method. The sampling pipeline of the online detector is set at the outlet of the fine solid-liquid separation equipment. The test sample water first passes through a 1.0mm protective filter screen before entering the corresponding detector to prevent residual large particles from clogging the detection channel. The controller stores historical operation records for thirty consecutive production days. These records include the adjusted effluent flow rate into the biological treatment unit, chemical oxygen demand (COD) detection results, suspended solids (SSD) detection results, effluent status of the biological treatment unit, membrane separation differential pressure status, and fault status. The controller considers records where the biological treatment unit has no liquid level exceeding limits, no aeration failures, no membrane separation differential pressure exceeding limits, and the effluent from the biological treatment unit meets the requirements for deep disinfection as stable operation records. Based on these stable operation records and the design allowable influent load of the biological treatment unit, the COD and SSD boundaries are fixed. The design allowable influent flow rate of the biological treatment unit is... The design allows for a chemical oxygen demand concentration of [missing value]. The design allows for a suspended solids concentration of [missing information]. First chemical oxygen demand boundary Set as Second chemical oxygen demand boundary Set as First suspended object boundary Set as Second suspended object boundary Set as ; The controller uses a two-index load grading model to determine the regulation level. This model consists of a chemical oxygen demand (COD) quantum level and a suspended solids (SSD) quantum level, with the higher of the two levels chosen as the regulation level for the current separated effluent. The calculation formula is as follows: ; in, Indicates the source category is The current regulating stage of the separated water, Indicates the source category in the current source identifier, and The values ​​are wastewater from mushroom house rinsing, wastewater from washing turnover baskets, post-harvest washing, or wastewater from mushroom residue treatment. Indicates the source category is The current chemical oxygen demand (COD) test results of the separated water. Indicates the source category is The current suspended solids test results of the separated water, This represents the first chemical oxygen demand boundary. Indicates the second chemical oxygen demand boundary. Indicates the boundary of the first suspended object. Indicates the boundary of the second suspended object. This is an indicator function that takes the value 1 when the condition inside the parentheses is true, and takes the value 0 when the condition inside the parentheses is false. This indicates taking the larger of the two child values ​​within the parentheses; when When this happens, the controller determines the current separated effluent to be low-load separated effluent and directs it into the primary equalization tank. When the controller determines the current separated effluent to be medium-load separated effluent, it will be directed to the secondary equalization tank. At this time, the controller will determine the current separated water as high-load separated water and introduce it into the tertiary equalization tank; The controller determines the diversion ratio entering each equalization tank based on the real-time liquid levels of the primary, secondary, and tertiary equalization tanks. The liquid level in each equalization tank is below the effective liquid level height. Water outflow is prohibited while water inflow is permitted, and the liquid level in each equalization tank is at the effective liquid level height. to Normal water inflow and outflow are permitted, and the liquid level in each equalization tank is higher than the effective liquid level height. When the same-stage separated effluent stops entering the equalization tank, it is temporarily stored in the corresponding collection tank until the liquid level in the equalization tank drops back to the effective liquid level height. Water was then reinstated. The agitators in the primary, secondary, and tertiary equalization tanks operate at liquid levels higher than the effective liquid level. The system continues to operate, homogenizing the separated effluent entering the same equalization tank at different times. The controller combines the effluent from each equalization tank in sequence from the primary equalization tank to the tertiary equalization tank, forming a mixed equalization effluent in the equalization effluent mixing well. When the chemical oxygen demand (COD) detected in the equalization effluent mixing well is not higher than... The suspended solids test result is not higher than And adjust the outflow rate not to exceed At this time, the controller maintains the current opening degree of the electrically controlled valves at the outlet of each regulating tank. When the chemical oxygen demand detected in the mixing well of the regulating effluent is higher than the specified value, the controller will maintain the current opening degree of the electrically controlled valves at the outlet of each regulating tank. Or the suspended matter test result is higher than At that time, the controller closes the effluent control valve of the tertiary regulating tank and reduces the opening of the effluent control valve of the secondary regulating tank to the opening before adjustment. At the same time, the opening degree of the effluent control valve of the primary equalization tank is increased so that the effluent load before entering the biological treatment unit returns to the design allowable influent load. When the low-load separation effluent from the primary equalization tank meets the requirement that the chemical oxygen demand (COD) test result is not higher than [a certain value] for three consecutive sampling cycles. The suspended solids test result is not higher than Furthermore, the chemical oxygen demand (COD) and suspended solids (SSD) test results of the effluent mixing well were both lower than the design allowable values. When the controller opens the primary bypass, the low-load separated water is sent to the regulating effluent mixing well through the primary bypass to participate in the mixing. The primary bypass is not directly connected to the biological treatment unit. When the chemical oxygen demand (COD) or suspended solids (SSO) test results of the effluent mixing well reach the corresponding design allowable values... When this happens, the controller shuts off the primary bypass and switches to the primary equalization tank outlet pipeline to extend the homogenization time of the low-load separated water. The controller generates treatment load information simultaneously with the regulated effluent. This treatment load information includes the regulated effluent flow rate, the regulated effluent chemical oxygen demand (COD) detection result, the regulated effluent suspended solids (SSS) detection result, the COD load, the SSS load, the number of the regulating tanks involved in the effluent, the opening degree of each effluent electrically controlled valve, the bypass opening status, and the composition ratio of the corresponding source identifier. The COD load is obtained by multiplying the regulated effluent flow rate by the regulated effluent COD detection result, and the SSS load is obtained by multiplying the regulated effluent flow rate by the regulated effluent suspended solids (SSS) detection result. This treatment load information is written into the operation record and transmitted to the inlet control terminal of the biological treatment unit, thereby completing the graded regulation, homogenization and peak shaving of the separated effluent, and load stabilization control before it enters the biological treatment unit.

[0022] In this specific embodiment, S3 includes: The biological treatment unit receives information on the effluent and its treatment load. Along the water flow direction, it sequentially comprises a hydrolysis-acidification zone, a carrier biofilm aerobic zone, and a membrane separation zone. The effluent mixing well is connected to the inlet of the hydrolysis-acidification zone via an inlet pump and an inlet electrically controlled valve. The controller reads the effluent flow rate, effluent chemical oxygen demand (COD) detection results, effluent suspended solids (SSD) detection results, COD load, and SSD load from the treatment load information. It then calculates the influent flow rate into the hydrolysis-acidification zone according to a 5-minute control cycle. The influent flow rate limitation model is as follows: ; in, This indicates the influent flow rate into the hydrolysis and acidification zone; HA represents the hydrolysis and acidification zone. This indicates the adjusted effluent flow rate formed in step S2. Indicates adjusting the water output. This indicates the maximum allowable influent flow rate for the biological treatment unit, and , This indicates the upper limit of the chemical oxygen demand (COD) load allowed by the design of the biological treatment unit, and Indicates chemical oxygen demand. This indicates the results of the chemical oxygen demand (COD) test in the effluent. This indicates the upper limit of the suspended solids load allowed by the design of the biological treatment unit, and Indicates suspended matter. This indicates the results of suspended solids testing in the adjusted effluent. Indicates the maximum allowed limit. This means taking the minimum value among the values ​​within the parentheses; 1000 means taking the minimum value among the values ​​within the parentheses. Converted to Unit conversion factor; When calculated When the flow rate is less than the regulated outflow rate, the controller reduces the frequency of the inlet pump and partially closes the inlet electric control valve, so that the regulated outflow that does not enter the biological treatment unit is retained in the primary regulating tank, secondary regulating tank, tertiary regulating tank or regulated outflow mixing well, and is re-involved in the inlet flow calculation in the next control cycle. The effective volume of the hydrolysis acidification zone is set as follows: The hydrolysis acidification zone is equipped with a low-speed submersible agitator, an oxidation-reduction potential detector, a level gauge, and a sludge discharge pipe. No aeration supply pipeline is installed in the hydrolysis acidification zone. The controller maintains the oxidation-reduction potential between -250mV and -50mV. The low-speed submersible agitator operates when the liquid level in the hydrolysis acidification zone is higher than the effective liquid level. After continuous operation, the effluent entering the hydrolysis and acidification zone comes into full contact with the sludge in the zone, so as to convert the large molecular organic matter and particulate organic matter in the effluent into small molecular organic matter that is easy to be degraded by subsequent aerobic processes, and to buffer the impact of the chemical oxygen demand load and suspended solids load of the effluent on the subsequent aerobic zone of the carrier biofilm. The effluent from the hydrolysis and acidification zone flows through an overflow weir into the aerobic zone of the carrier biofilm. The effective volume of the aerobic zone of the carrier biofilm is set to... The loading body packing material is placed in the area. The carrier packing material is a polyethylene suspended biofilm carrier, and the filling rate is set at [value missing]. The specific surface area of ​​the carrier packing is set to Microporous aerators are installed at the bottom of the aerobic zone of the carrier biofilm. The microporous aerators are connected to the variable frequency blower. Dissolved oxygen detectors, temperature detectors and sludge concentration detectors are installed in the aerobic zone of the carrier biofilm. The controller adjusts the aeration rate of the aerobic zone of the carrier biofilm based on the chemical oxygen demand (COD) load after entering the hydrolysis and acidification zone. The COD load after entering the hydrolysis and acidification zone is determined by... and After unit conversion, the chemical oxygen demand (COD) load after entering the hydrolysis and acidification zone is no higher than [the specified value]. At that time, the blower air supply volume is set to When the chemical oxygen demand load after entering the hydrolysis and acidification zone is higher than and not higher than At that time, the blower air supply volume is set to When the chemical oxygen demand load after entering the hydrolysis and acidification zone is higher than and not higher than At that time, the blower air supply volume is set to Simultaneously, the controller uses the dissolved oxygen detection results in the aerobic zone of the carrier biofilm as feedback to maintain the dissolved oxygen level at a certain level. to Between, when dissolved oxygen is below Increase the frequency of the current blower. When dissolved oxygen is higher Reduce the current blower frequency The blower's air supply is always limited to to between; The effluent from the aerobic zone of the carrier biofilm enters the membrane separation zone. The membrane separation zone is equipped with a hollow fiber ultrafiltration membrane module, a membrane effluent pump, membrane zone aeration pipes, a return pump, a return pipeline, a membrane separation differential pressure detector, and a permeate flow meter. The pore size of the hollow fiber ultrafiltration membrane module is set to [value missing]. The total membrane area is set to Membrane flux is controlled at no more than The membrane effluent pump draws permeate water in a cycle of 8 minutes of operation and 2 minutes of rest. The aeration pipes in the membrane area maintain aeration during the operation and rest of the membrane effluent pump to reduce the deposition of pollutants on the membrane surface. The reflux flow rate of the membrane separation zone refers to the flow rate of the mixed liquor at the bottom of the membrane separation zone returning to the inlet of the hydrolysis-acidification zone via the reflux pump and reflux pipeline. The controller adjusts the reflux flow rate of the membrane separation zone according to the suspended solids load after entering the hydrolysis-acidification zone. The suspended solids load after entering the hydrolysis-acidification zone is determined by... and After unit conversion, the suspended solids load after entering the hydrolysis and acidification zone should not exceed [the specified value]. At that time, the return flow rate is set to When the suspended solids load after entering the hydrolysis and acidification zone is higher than and not higher than At that time, the return flow rate is set to When the suspended solids load after entering the hydrolysis and acidification zone is higher than and not higher than At that time, the return flow rate is set to When the membrane separation pressure difference is higher than 35 kPa for two consecutive control cycles, the controller will extend the membrane effluent pump stop time to 5 minutes and maintain membrane zone aeration and current return flow to flush the deposited layer on the membrane surface. After being metered by the permeate flow meter, the effluent from the membrane separation zone enters the subsequent deep disinfection unit as biological treatment effluent. The controller writes the influent flow rate into the hydrolysis acidification zone, the aeration rate of the carrier biofilm aerobic zone, the return flow rate of the membrane separation zone, the dissolved oxygen detection result, the membrane separation pressure difference detection result, the membrane effluent flow rate, and the biological treatment effluent generation time into the operation record. This ensures that the influent flow rate and treatment parameters of the biological treatment unit are linked with the treatment load information in step S2, and obtains biological treatment effluent with stable load and stable solid-liquid retention.

[0023] In this specific embodiment, S4 includes: The biologically treated effluent, along with the deep disinfection and hygiene assessment module, is sequentially arranged with a precision filter, ultraviolet irradiation device, sodium hypochlorite dosing device, disinfection contact tank, and disinfection effluent detection pipeline. The biologically treated effluent first enters the precision filter, which employs a cartridge-type filtration structure with a filtration precision set to [value missing]. This system is used to intercept residual fine suspended solids, detached biofilm fragments, and particulate matter affecting UV transmittance in the effluent from the membrane separation zone. An inlet pressure sensor is installed at the inlet of the precision filter, and an outlet pressure sensor and an online suspended solids detector are installed at the outlet. When the difference between the inlet and outlet pressures reaches 0.08 MPa, the controller stops the precision filter from receiving water and initiates a backwashing procedure. The backwash water is returned to the tertiary equalization tank in step S2. The effluent from the precision filter is used as disinfection feedwater. Disinfection feedwater refers to water that has undergone precision filtration before entering the UV irradiation device. The controller collects suspended solids detection results from the disinfection feedwater at a sampling cycle of 5 minutes. ,in, This indicates the test results for suspended solids in the disinfection influent. Indicates disinfection water intake. The unit is ; The ultraviolet irradiation device employs a closed-loop ultraviolet reactor. The main wavelength of the ultraviolet lamp is 254 nm. The reactor is equipped with an ultraviolet intensity sensor, a quartz sleeve cleaning mechanism, and a flow meter. The controller operates according to... In addition, the ultraviolet irradiation dose was determined based on the microbial indicators of the disinfected effluent from the previous batch. and sodium hypochlorite dosage ,in, This indicates the ultraviolet radiation dose applied to the disinfected influent by the ultraviolet irradiation device, expressed in units of... This indicates the amount of sodium hypochlorite added, expressed as available chlorine, in units of... ; when Furthermore, the total bacterial count of the previous batch was not higher than [the specified value]. When total coliforms are undetectable, the controller will... Set as and will Set as ; If the following Level 3 disinfection triggering conditions are not met, when Or the total bacterial count of the previous batch was higher than But not higher than Or, the total coliform count of the previous batch was higher than that of the undetected batch but not higher than that of the previous batch. At that time, the controller will Set as and will Set as ; when Or the total bacterial count of the previous batch was higher than Or the total coliform count of the previous batch was higher than At that time, the controller will Set as and will Set as ; when At this time, the controller stops the disinfection water from entering the ultraviolet irradiation device, keeps the water output from the precision filter in the disinfection water buffer tank, and initiates backwashing of the precision filter and retesting of the disinfection water. After the retest... Resume ultraviolet irradiation and sodium hypochlorite addition as needed; The sodium hypochlorite dosing device includes a sodium hypochlorite storage tank, a metering pump, a dosing pipeline, a static mixer, and a residual chlorine detector. The effective chlorine mass fraction of the solution in the sodium hypochlorite storage tank is fixed at [value missing]. The metering pump operates according to the settings of the controller. After continuous dosing, the effluent from UV irradiation is mixed with the sodium hypochlorite solution in a static mixer before entering the disinfection contact tank. The effective volume of the disinfection contact tank is set to... The nominal hydraulic retention time is determined by the ratio of the effective water volume to the actual average flow rate. The residual chlorine control range at the effluent outlet of the disinfection contact tank is [range missing]. to When the residual chlorine is lower than At that time, the controller will currently Increase When the residual chlorine is higher than At that time, the controller will currently reduce Adjusted Still limited to to between; The effluent from the disinfection contact tank enters the disinfection effluent testing pipeline as the disinfection effluent. This pipeline is equipped with an automatic sampler, a rapid total bacterial count analyzer, and a rapid total coliform count analyzer. The controller collects disinfection effluent samples in 30-minute batches. The rapid total bacterial count analyzer outputs the total bacterial count using flow cytometry. ,in, This indicates the total number of bacterial colonies in the disinfected effluent. Indicates disinfected water output. The unit is The total coliform rapid detection instrument uses enzyme substrate fluorescence detection to output the total coliform count. ,in, This indicates the total coliform count in the disinfected effluent. The unit is MPN / 100mL; The controller stores preset hygiene thresholds for four reuse applications: mushroom house cleaning, turnover basket cleaning, post-harvest cleaning, and substrate treatment. The total colony count threshold for post-harvest cleaning is [threshold value missing]. And the total coliform threshold is The threshold for total bacterial count in the turnover baskets is 500 CFU / mL and the threshold for total coliform bacteria is 3 MPN / 100mL. The threshold for total bacterial count in the mushroom house is 1000 CFU / mL and the threshold for total coliform bacteria is... The threshold for total bacterial count corresponding to substrate treatment is: And the total coliform threshold is ; The controller uses a dual-indicator hygiene assessment model to generate hygiene assessment results. The dual-indicator hygiene assessment model is as follows: ; in, This indicates that the disinfected effluent is suitable for reuse. The health assessment results This indicates that the disinfected effluent has reached the point of being suitable for reuse. The corresponding preset hygiene threshold, This indicates that the disinfected effluent has not been suitable for reuse. The corresponding preset hygiene threshold, Indicates the purpose of reuse, and The values ​​can be: mushroom house cleaning, turnover basket cleaning, post-harvest cleaning, or substrate treatment. This indicates the total number of bacterial colonies in the disinfected effluent. This indicates the total coliform count in the disinfected effluent. Indicates reuse purpose The corresponding total colony count threshold, Indicates reuse purpose The corresponding total coliform threshold, Indicates the upper limit of the threshold; The controller will The reuse purpose should be written into the list of available uses for this batch, and the sampling time and disinfection influent should be recorded. Ultraviolet radiation dose Sodium hypochlorite dosage Residual chlorine test results, total bacterial count Total coliform bacteria Corresponding to each reuse purpose and The hygiene judgment results obtained from the dual-indicator hygiene judgment model are written into the operation record, thereby forming deep disinfection and hygiene judgment data that can trace the relationship between disinfection operation status, microbial test results and usage hygiene thresholds.

[0024] In this specific embodiment, S5 includes: Upon receiving the disinfected effluent and its hygienic assessment results, the disinfected effluent first enters the assessment area of ​​the reclaimed water tank. The effective volume of the reclaimed water tank is set as follows: The reclaimed water tank is divided into a pending judgment area, a first-level qualified water area, a second-level qualified water area, a third-level qualified water area, a fourth-level qualified water area, and an unqualified isolation area by fixed partitions. The pending judgment area is used to receive disinfected water that has not yet completed the writing of the use level label. The first-level qualified water area is for post-harvest cleaning, the second-level qualified water area is for turnover basket cleaning, the third-level qualified water area is for mushroom house cleaning, and the fourth-level qualified water area is for substrate treatment. The unqualified isolation area is used to temporarily store disinfected water that has not reached any preset hygiene threshold. The controller uses the hygiene determination result from step S4. Generate a usage level identifier, which indicates the highest hygiene level that the disinfected effluent of the currently determined batch can meet. The generation relationship is as follows: ; in, Indicates disinfection water output Usage level label, This indicates the disinfected effluent output from step S4. Indicates the intended use for reuse. Represents the set of reuse uses, and It consists of post-harvest cleaning, turnover basket cleaning, mushroom house cleaning, and substrate treatment. Indicates belonging to, This indicates that the disinfected effluent is suitable for reuse. The health assessment results This indicates that the disinfected effluent has reached the point of being suitable for reuse. The corresponding preset hygiene threshold, This indicates that the disinfected effluent has not been suitable for reuse. The corresponding preset hygiene threshold, This indicates the number of reuses that have reached the preset hygiene threshold. Indicates reuse purpose The hygiene grade number, and (Post-harvest cleaning) , Cleaning of turnover baskets Mushroom house cleaning Base material treatment This indicates that the minimum value among the hygiene grade numbers that satisfy the conditions within the parentheses is selected. This indicates that the subsequent conditions are met, and 0 indicates that the disinfected effluent of the current batch has not reached any preset sanitary threshold. when At that time, the controller will transfer the disinfected effluent of the current batch from the pending judgment area to the first-level qualified water area, and write the list of usable uses as post-harvest cleaning, turnover basket cleaning, mushroom house cleaning and substrate treatment; when At that time, the controller will transfer the disinfected effluent of the current batch from the pending judgment area to the secondary qualified water area, and write the list of usable uses as turnover basket cleaning, mushroom house cleaning and substrate treatment; when At this time, the controller will transfer the disinfected effluent of the current batch from the pending judgment area to the third-level qualified water area, and write the list of usable uses as mushroom house cleaning and substrate treatment; when When the controller is in operation, it will transfer the disinfected effluent of the current batch from the pending assessment area to the fourth-level qualified water area and write the list of usable uses into the base material treatment. when When this happens, the controller will transfer the disinfected effluent of the current batch from the pending assessment area to the unqualified isolation area and prohibit it from entering any reuse distribution pipeline. Level gauges, water pumps, water flow meters, check valves, and electrically controlled valves are respectively installed in the first-level qualified water zone, the second-level qualified water zone, the third-level qualified water zone, and the fourth-level qualified water zone. Each reuse distribution pipeline is connected to the post-harvest cleaning water point, the turnover basket cleaning water point, the mushroom house cleaning water point, and the substrate treatment water point. The check valve is installed after the water pump and before the electrically controlled valve to prevent water in the reuse distribution pipeline from flowing back to the reclaimed water tank. The electrically controlled valve is opened or closed by the controller according to the use level identification, the list of available uses, the level of the reclaimed water tank, and the water demand status of each reuse use. The water demand status of each reuse purpose is determined by the production line water demand signal, the pipeline pressure signal and the corresponding cleaning equipment operation signal. When the production line water demand signal is valid, the corresponding pipeline pressure is lower than the set water supply pressure and the corresponding cleaning equipment is in the water inlet state, the controller determines that the reuse purpose is in the water demand state. When multiple reuse applications are in water demand at the same time, the controller determines the water supply sequence according to the order of post-harvest cleaning, turnover basket cleaning, mushroom house cleaning, and substrate treatment, and only draws water from qualified water areas that have reached the preset sanitary threshold corresponding to the target application. When the intended use is post-harvest cleaning, the controller only allows water to be supplied from the primary qualified water zone to the post-harvest cleaning and reuse distribution pipeline; When the intended use is for cleaning turnover baskets, the controller allows the primary or secondary qualified water zone to supply water to the turnover basket cleaning and reuse distribution pipeline. When the intended use is mushroom house cleaning, the controller allows the primary qualified water zone, the secondary qualified water zone, or the tertiary qualified water zone to supply water to the mushroom house cleaning and reuse distribution pipeline. When the intended use is for substrate treatment, the controller allows the primary qualified water zone, secondary qualified water zone, tertiary qualified water zone or quaternary qualified water zone to supply water to the substrate treatment reuse distribution pipeline; When the disinfected effluent of a certain batch fails to reach the preset sanitary threshold corresponding to the target use but reaches the preset sanitary threshold corresponding to other uses, the controller only opens the reuse distribution pipeline corresponding to the other use and closes the electric control valve corresponding to the target use, thereby preventing reclaimed water with insufficient sanitary grade from being supplied to the target use. The preset water supply boundary for each qualified water zone is set at the effective liquid level height. When the water level in the designated water supply area is lower than the preset water supply boundary, the controller closes the corresponding electric control valve and stops the corresponding water pump, and records the reason for the supply stoppage as insufficient water level. When the intended use level of the qualified water area is inconsistent with the target use, or when the target use is not included in the list of available uses for the current batch of qualified water area, the controller closes the corresponding electrically controlled valve and records the reason for the supply stoppage as mismatch of use level. A return pump and return pipeline are installed at the outlet of the non-compliant isolation zone. The return pipeline is connected to the tertiary equalization tank in step S2 and the inlet of the hydrolysis acidification zone in step S3, respectively. When the suspended solids test result of the disinfection effluent in the non-compliant isolation zone is higher than the required level, the return pump and return pipeline will be installed at the outlet of the non-compliant isolation zone. Or the chemical oxygen demand (COD) test result is higher than When the controller opens the reflux valve leading to the tertiary equalization tank and returns the substandard disinfected effluent to the graded equalization unit, the suspended solids test result of the disinfected effluent in the substandard isolation zone is not higher than the specified value. And the chemical oxygen demand test result is not higher than When the controller opens the reflux valve leading to the inlet of the hydrolysis acidification zone and returns the unqualified disinfected effluent to the biological treatment unit, the disinfected effluent that has not reached any preset sanitary threshold will re-enter the treatment process. The online monitoring unit collects detection data from each collection pipeline and treatment unit according to the preset sampling cycle. The sampling cycle for flow rate, chemical oxygen demand and suspended solids detection data of each collection pipeline, regulating effluent mixing well, inlet of hydrolysis acidification zone, aerobic zone of carrier biofilm, effluent of membrane separation zone and each section of reclaimed water tank is 5 minutes. The sampling cycle for total bacterial count and total coliform count detection data of disinfected effluent is 30 minutes. The controller compares the detection data of the current sampling period with the detection data of the previous sampling period and generates a water quality change status. The water quality change status includes a stable state, an upward trend, a shock state, and a downward trend. The controller assumes that the changes in the current chemical oxygen demand (COD) detection result, suspended solids (SSD) detection result, and flow rate relative to the previous sampling period do not exceed [a certain threshold]. A stable state is formed when the increase in chemical oxygen demand (COD) or suspended solids levels is greater than [a certain value]. and not exceeding When an upward trend is generated, the increase in the chemical oxygen demand (COD) or suspended solids (SSO) test results is greater than [a certain value]. Or the increase in flow rate is greater than A shock state is generated when both the chemical oxygen demand (COD) and suspended solids (SSO) test results decrease by more than [a certain percentage]. A declining state is generated when two consecutive sampling periods maintain a downward trend; During the rising phase, the controller increases the diversion ratio to the higher-level equalization tank, closes the primary bypass, and reduces the influent flow into the hydrolysis acidification zone. Increase the aeration rate of the aerobic zone of the carrier biofilm Increase the reflux flow rate in the membrane separation zone and increase the ultraviolet radiation dose Increased sodium hypochlorite dosage ,in This indicates the influent flow rate into the hydrolysis-acidification zone in step S3; under impact conditions, the controller stops the primary bypass and uses the tertiary equalization tank as the main receiving equalization tank for high-load separated effluent, thus reducing the influent flow rate into the hydrolysis-acidification zone. Adjust the aeration rate of the aerobic zone of the carrier biofilm to Adjust the reflux flow rate of the membrane separation zone to And adjust the ultraviolet irradiation dose to The dosage of sodium hypochlorite was adjusted to... ; In the descending state, the controller restores the judgment conditions of the first-level bypass, recalculates the influent flow rate into the hydrolysis acidification zone according to the influent flow rate limit model in step S3, restores the aeration rate of the carrier biofilm aerobic zone and the return flow rate of the membrane separation zone to the set values ​​corresponding to the current chemical oxygen demand load and suspended solids load, and restores the ultraviolet irradiation dose and sodium hypochlorite dosage to the set values ​​in step S4 corresponding to the suspended solids detection results of the disinfection influent and the microbial indicators of the previous judgment batch; After each linkage adjustment, the controller writes the water quality change status, the detection data that triggered the status, the reason for the adjustment, the diversion ratio before and after the adjustment, the influent volume, aeration volume, return flow, ultraviolet radiation dose, sodium hypochlorite dosage, the opening and closing status of the reuse distribution pipeline, and the control time into the operation record. When any online detection data is missing for two consecutive sampling periods, or when the traffic detection data exceeds... to The sensor's measurement range, or the chemical oxygen demand (COD) detection data exceeds... to The sensor's measurement range, or the suspended matter detection data exceeds... to The sensor's measurement range, or the total colony count detection data, exceeds... to The sensor's measurement range, or the total coliform count data exceeds... to When the sensor reaches its range, the controller generates a detection anomaly status. The online monitoring unit initiates a periodic retest every 4 hours. This periodic retest includes online instrument retesting and manual verification of retained samples. When the deviation between the online chemical oxygen demand (COD) monitoring data and the periodic retest results exceeds [a certain threshold], [further action will be taken]. Or the deviation between the online detection data of suspended solids and the results of periodic retesting exceeds If the deviation between the online detection data of total bacterial count and the periodic retest results exceeds one order of magnitude, or if the deviation between the online detection data of total coliforms and the periodic retest results exceeds one detection gradient, the controller will also generate an abnormal detection status. After the controller generates an abnormal detection status, it immediately triggers a safety interlock. The safety interlock includes closing the electrically controlled valve of the post-harvest cleaning and reuse distribution pipeline, closing the electrically controlled valve of the turnover basket cleaning and reuse distribution pipeline, stopping the external water supply from the primary qualified water zone and the secondary qualified water zone, keeping the disinfected effluent in the pending judgment zone in the pending judgment zone, and returning the disinfected effluent in the unqualified isolation zone to the inlet of the tertiary equalization tank or hydrolysis acidification zone according to its chemical oxygen demand test results and suspended solids test results. It also prohibits the disinfected effluent generated under the abnormal detection status from being used for post-harvest cleaning and turnover basket cleaning purposes. When the periodic retest results return to the corresponding preset verification boundary, and the hygiene judgment results of two consecutive batches show that the post-harvest cleaning or turnover basket cleaning reaches the corresponding preset hygiene threshold, the controller releases the safety interlock, restores the reuse distribution pipeline that matches the corresponding purpose, and writes the release time, retest results, hygiene judgment results and the restored electric control valve number into the operation record. Through the generation of the above-mentioned application level identification, graded water supply, online monitoring and linkage adjustment, abnormal detection safety interlock, check valve to prevent backflow and treatment of unqualified disinfected water return, step S5 supplies disinfected water that has reached the corresponding preset sanitary threshold to the corresponding reuse purpose, and sends disinfected water that has not reached any preset sanitary threshold back into the treatment process, forming a closed loop of wastewater treatment, sanitary determination and recycling.

[0025] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0026] This invention integrates source identification, load detection, graded regulation, biological treatment, disinfection determination, and reuse valve control into the same controller, enabling water quality fluctuations to be homogenized and peaked before entering biological treatment, and ensuring that each batch of reclaimed water has a traceable usage level and hygiene determination result.

[0027] Under different production cycles or water quality conditions, the controller can adjust the diversion ratio, treatment load, disinfection parameters, and reuse threshold in a coordinated manner. When abnormalities are detected or sanitary conditions are not met, the system prioritizes isolation and recirculation treatment, thereby maintaining treatment stability and the safety of graded reuse.

Claims

1. A method for regenerating and reusing wastewater from king oyster mushroom cultivation, characterized in that, include: S1. Collect the wastewater from the mushroom house rinsing, turnover basket washing, post-harvest washing, and mushroom residue treatment separately. Perform coarse solid-liquid separation and fine solid-liquid separation on each source of wastewater to obtain the separated effluent with source identification. S2. Collect the flow rate, chemical oxygen demand (COD), and suspended solids (SSD) of the separated effluent. Based on the source identification and test results, introduce the separated effluent into the corresponding graded regulation unit for homogenization and peak reduction to obtain the regulated effluent and its treatment load information. S3. Adjust the influent flow and treatment parameters of the biological treatment unit according to the treatment load information to perform biological treatment on the regulated effluent to obtain biologically treated effluent. S4. Perform deep disinfection on the biologically treated effluent and test the microbial indicators of the disinfected effluent. Compare the microbial indicators with the preset sanitary thresholds corresponding to each reuse purpose to obtain a sanitary judgment result that includes usable uses. S5. Based on the sanitary judgment result, allocate the disinfected effluent that meets the corresponding preset sanitary threshold to the corresponding mushroom house cleaning, turnover basket cleaning, post-harvest cleaning, or substrate treatment stages. Return the disinfected effluent that does not meet any preset sanitary threshold to the graded regulation unit or biological treatment unit, forming a closed loop of wastewater treatment, sanitary judgment, and recycling.

2. The method for regenerating and reusing Pleurotus ostreatus wastewater according to claim 1, characterized in that, S1 includes: Set up independent collection pipelines for wastewater from each source and generate source identifiers that include source type, collection period, and cumulative flow. After using a grid or drum screen to trap culture medium residue and bacterial residue, the remaining suspended matter is separated by a micro-sieve or air flotation. The solids obtained from coarse solid-liquid separation and the scum obtained from fine solid-liquid separation are then sent to the bacterial residue treatment stage.

3. The method for regenerating and reusing Pleurotus ostreatus wastewater according to claim 1, characterized in that, S2 includes: the controller sets chemical oxygen demand boundaries and suspended solids boundaries based on the allowable influent load of the biological treatment unit and historical operating records; compares the detection results of each separated effluent with the boundaries to determine the regulation level; sends the separated effluent of different regulation levels into the corresponding regulation tank according to the diversion ratio determined by the controller; and switches the bypass or the regulation tank effluent pipeline according to the level of the regulation tank and the effluent load status to ensure that the mixed regulated effluent load is within the allowable influent load.

4. The method for regenerating and reusing Pleurotus ostreatus wastewater according to claim 3, characterized in that, S3 includes: The biological treatment unit is sequentially configured with a hydrolysis acidification zone, a carrier biofilm aerobic zone, and a membrane separation zone. The controller adjusts the influent flow rate into the hydrolysis acidification zone, the aeration rate of the carrier biofilm aerobic zone, and the return flow rate of the membrane separation zone based on the flow rate, chemical oxygen demand load, and suspended solids load in the treatment load information, and uses the effluent from the membrane separation zone as the biological treatment effluent.

5. The method for regenerating and reusing Pleurotus ostreatus wastewater according to claim 4, characterized in that, S4 includes: sequentially performing precision filtration, ultraviolet irradiation, and sodium hypochlorite disinfection on the biologically treated effluent; the controller adjusts the ultraviolet irradiation dose and sodium hypochlorite dosage based on the suspended solids detection results of the disinfection influent and the microbial indicators of the disinfection effluent, and records the sampling time, disinfection operation status, microbial detection results, and corresponding preset sanitary thresholds.

6. The method for regenerating and reusing Pleurotus ostreatus wastewater according to claim 5, characterized in that, S5 includes: the controller stores preset hygiene thresholds corresponding to the uses of mushroom house cleaning, turnover basket cleaning, post-harvest cleaning and substrate treatment respectively; sends the disinfected effluent into the reclaimed water tank and generates a use level identifier; opens the reuse distribution pipeline that matches the use level identifier; distributes the disinfected effluent that does not reach the preset hygiene threshold corresponding to the target use but reaches the preset hygiene threshold corresponding to other uses only to the other uses; and isolates and recirculates the disinfected effluent that does not reach any preset hygiene threshold.

7. The method for regenerating and reusing Pleurotus ostreatus wastewater according to claim 6, characterized in that, The online monitoring unit collects flow rate, chemical oxygen demand, suspended solids and microbial detection data of each collection pipeline and treatment unit according to the preset sampling cycle; the controller generates water quality change status based on the current detection data and the detection data of the previous sampling cycle, and adjusts the diversion ratio, influent volume, aeration volume, return flow, ultraviolet irradiation dose and sodium hypochlorite dosage in conjunction with the water quality change status, and writes the reason for the adjustment and the adjusted operating status into the operation record.

8. The method for regenerating and reusing Pleurotus ostreatus wastewater according to claim 7, characterized in that, When any online detection data is missing, exceeds the range of the corresponding sensor, or deviates from the periodic retest result beyond the preset verification boundary, the controller generates an abnormal detection state and triggers a safety interlock, stops supplying water to post-harvest cleaning and turnover basket cleaning, and keeps the water to be judged in the reclaimed water tank or recirculates it. Once the retest result returns to the preset verification boundary and the hygiene judgment result reaches the corresponding preset hygiene threshold, the safety interlock is released and the corresponding reuse distribution pipeline is restored.

9. The method for regenerating and reusing Pleurotus ostreatus wastewater according to claim 8, characterized in that, The controller determines the water supply sequence based on the reclaimed water tank level, the water demand status of each reuse purpose, and the purpose level label. It then performs tiered water supply through check valves and electrically controlled valves installed in each reuse distribution pipeline. When the reclaimed water tank level does not reach the preset water supply boundary or the purpose level label is inconsistent with the target purpose, the corresponding electrically controlled valve is closed and the reason for the supply stoppage is recorded to prevent backflow between pipelines of different purposes and to prevent reclaimed water that does not meet the sanitary threshold of the target purpose from being supplied.

10. A system for reclaiming and reusing wastewater from *Pleurotus ostreatus* mushrooms, used to execute the method for reclaiming and reusing wastewater from *Pleurotus ostreatus* mushrooms according to any one of claims 1 to 9, characterized in that, include: The diversion and solid-liquid separation module is used to collect wastewater according to its source and perform coarse solid-liquid separation and fine solid-liquid separation. The graded adjustment module is used to homogenize and reduce peaks based on source identification and the detection results of flow rate, chemical oxygen demand and suspended solids. The system includes a biological treatment module for adjusting the influent flow and treatment parameters based on the treatment load information and outputting biologically treated effluent; a deep disinfection and hygiene assessment module for performing deep disinfection on the biologically treated effluent and generating a hygiene assessment result that includes usable uses; a reuse distribution and recirculation module for classifying and supplying disinfected effluent that has reached the corresponding preset hygiene threshold to the corresponding reuse uses and recirculating unqualified disinfected effluent back for treatment; and an online monitoring unit, a controller, a reclaimed water tank, a recirculation pipeline, and a reuse distribution pipeline. The controller is communicatively connected to the actuators of each module, the online monitoring unit, and each pipeline.

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