A method for rapid acclimation of sewage plant sludge

Abstract

This invention belongs to the field of wastewater treatment technology and relates to a rapid acclimatization method for wastewater treatment plant sludge. This invention provides a rapid acclimatization method for wastewater treatment plant sludge, comprising the following steps: selecting high-quality seed sludge; and performing COD analysis. hard The acclimatization period was determined by measurement; seed sludge was inoculated, wastewater was added, and acclimatization was carried out to obtain sludge; after acclimatization, wastewater treatment was carried out. The acclimatization method described in this invention can quickly achieve sludge acclimatization, improve the shock resistance and resilience of sludge, and effectively alleviate the shock response problems of wastewater treatment plants.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically relating to a rapid acclimatization method for sludge from wastewater treatment plants. Background Technology

[0002] Currently, the activated sludge process is the most widely used method in wastewater treatment plants in China. However, most wastewater treatment plants only assess sludge activity based on whether the effluent meets standards. When faced with upstream water surges, the sludge system has no better countermeasures than passively "accepting" the influx of sludge and then re-adding and cultivating it. Furthermore, the sludge addition standards for newly built wastewater treatment plants are also uniformly applied: "municipal sludge is sufficient." This hinders the targeted assessment of the sludge system and puts pressure on the stable operation of the water treatment plant. Currently, there is a lack of a faster and more efficient sludge acclimation method to ensure the stable operation of the water treatment plant. Summary of the Invention

[0003] The purpose of this invention is to provide a rapid acclimatization method for sewage treatment plant sludge. The acclimatization method described in this invention can quickly acclimatize sludge, improve its shock resistance and resilience, and effectively alleviate the shock response problems of sewage treatment plants.

[0004] This invention provides a rapid acclimatization method for sewage sludge from wastewater treatment plants, comprising the following steps:

[0005] Select high-quality seed mud; the selection criteria for high-quality seed mud include: total microbial count not less than 650 individuals / mL, protozoan to metazoan ratio not more than 20:1, activity level not less than 70%, proportion of medium and large microorganisms not less than 70%, brown color and compact density of bacterial flocs.

[0006] Perform COD hard The theoretical sludge age and the time required for wastewater to decrease from its original COD value to its minimum COD value are determined by measurement. The sludge deflocculation time and the time required for wastewater to change from organic to inorganic are observed and determined, thereby determining the acclimatization period. The method for determining the acclimatization period includes: the minimum value of the acclimatization period is less than the sludge deflocculation time and less than the time required for wastewater to change from organic to inorganic; the maximum value is less than the theoretical sludge age and less than or equal to the time required for wastewater to decrease from its original COD value to its minimum COD value.

[0007] Inoculate seed mud, add wastewater, and acclimate to obtain sludge; the acclimatization includes gradually increasing the load intensity until the sludge can adapt to 110-120% of the influent load;

[0008] After acclimatization, wastewater treatment is carried out, with the following parameters controlled: 30-minute settling ratio of 35-45%, sludge concentration of 5-5.5 g / L, dissolved oxygen of 1.5-2.5 mg / L, sludge return ratio of 80-100%, and sludge-to-wastewater mixed liquor return ratio of 200-300%.

[0009] Preferably, the acclimatization process also includes microscopic examination, full-process evaluation, feedback, and optimization to ensure that the sludge produced during the acclimatization process meets the selection criteria for high-quality seed mud.

[0010] Preferably, the process control method includes adding sludge and / or increasing the wastewater volume.

[0011] Preferably, after selecting high-quality seed mud, a water mixing test is also conducted; the water mixing test includes mixing the seed mud with the wastewater to be treated, recording the reaction time, water quality and sludge changes, in order to test the adaptability of the sludge.

[0012] Preferably, the acclimatization period is 15 to 26 days.

[0013] Preferably, the acclimatization includes the following stages: sludge inoculation stage, initial system startup stage, sludge acclimatization and load increase stage, and trial operation and acceptance stage.

[0014] Preferably, the sludge inoculation stage lasts for 2 days, the initial system startup stage lasts for 2 days, the sludge acclimatization and load increase stage lasts for 9 to 20 days, and the trial operation and acceptance stage lasts for 2 days.

[0015] Preferably, the gradual increase in load intensity includes: gradually increasing the wastewater volume in increments of 10-20%, ultimately enabling the sludge to adapt to an influent load of 110-120%.

[0016] Preferably, the acclimatization days for each level are 1-2 days, 1-3 days, 2-3 days, 2-5 days, and 3-7 days, respectively.

[0017] Preferably, after acclimatization, the 30-minute settling ratio, sludge concentration, dissolved oxygen, sludge return ratio, and mixed liquor return ratio are measured every 1 to 3 days.

[0018] This invention provides a rapid acclimatization method for sludge from wastewater treatment plants. The acclimatization method of this invention proposes quantitative standards for "how to better and faster acclimatize sludge." By selecting high-quality seed sludge, strengthening the control of the microbial cultivation process, and artificially increasing the "shock" experiments within a controllable range, the sludge can be rapidly acclimatized, and its shock resistance and resilience can be improved, effectively alleviating the shock response problems of wastewater treatment plants. Detailed Implementation

[0019] This invention provides a rapid acclimatization method for sewage sludge from wastewater treatment plants, comprising the following steps:

[0020] Select high-quality seed mud; the selection criteria for high-quality seed mud include: total microbial count not less than 650 individuals / mL, protozoan to metazoan ratio not more than 20:1, activity level not less than 70%, proportion of medium and large microorganisms not less than 70%, brown color and compact density of bacterial flocs.

[0021] Perform COD hard The theoretical sludge age and the time required for wastewater to decrease from its original COD value to its minimum COD value are determined by measurement. The sludge deflocculation time and the time required for wastewater to change from organic to inorganic are observed and determined, thereby determining the acclimatization period. The method for determining the acclimatization period includes: the minimum value of the acclimatization period is less than the sludge deflocculation time and less than the time required for wastewater to change from organic to inorganic; the maximum value is less than the theoretical sludge age and less than or equal to the time required for wastewater to decrease from its original COD value to its minimum COD value.

[0022] Inoculate seed mud, add wastewater, and acclimate to obtain sludge; the acclimatization includes gradually increasing the load intensity until the sludge can adapt to 110-120% of the influent load;

[0023] After acclimatization, wastewater treatment is carried out, with the following parameters controlled: 30-minute settling ratio of 35-45%, sludge concentration of 5-5.5 g / L, dissolved oxygen of 1.5-2.5 mg / L, sludge return ratio of 80-100%, and sludge-to-wastewater mixed liquor return ratio of 200-300%.

[0024] This invention selects high-quality seed mud. The selection criteria for high-quality seed mud include: a total microbial count of not less than 650 individuals / mL, a protozoan to metazoan ratio of not more than 20:1, an activity level of not less than 70%, a proportion of medium and large microorganisms (hereinafter referred to as the "large insect ratio") of not less than 70%, a brown color, and a compact bacterial floc structure. This invention preferably involves microscopic examination of the selected seed mud to observe and quantify each indicator, ensuring that the total microbial count is not less than 650 individuals / mL, the protozoan to metazoan ratio is not more than 20:1, the activity level is not less than 70%, the proportion of medium and large microorganisms is not less than 70%, the color is brown, and the bacterial floc structure is compact. In this invention, the activity level is calculated by visual observation, including but not limited to flagellar pulsation, insect wriggling, swaying, bouncing, swimming, and the proportion of feeding microorganisms in the total microbial count. In this invention, moderate to large microorganisms are preferably determined by visual observation under a microscope. The preferred method for determining moderate to large microorganisms is as follows: using the adult size of a certain microorganism as a benchmark, if the volume of the microorganism is 70-100% of the adult size, it is determined to be a moderate to large microorganism. This invention ensures the activity of the seed sludge through the selection of high-quality seed sludge. Table 1 shows the microscopic examination record of sludge that meets the seed sludge standards of this invention.

[0025] Table 1. Sludge Microscopic Examination Record Sheet

[0026]

[0027]

[0028] After selecting high-quality seed mud, this invention preferably also includes conducting a water mixing test. The water mixing test preferably involves mixing the seed mud with the wastewater to be treated, recording the reaction time, water quality, and sludge changes to verify the sludge's adaptability. The purpose of conducting the water mixing test in this invention is: 1. Conducting a water mixing test before adding the seed mud to the tank reduces the risk of direct addition; 2. Conducting a water mixing test first can identify any potential problems after mixing the seed mud with the wastewater to be treated, such as large-scale microbial death, whether the seed mud floats on the water surface preventing contact between the bottom wastewater and the seed mud, and whether the seed mud can be fully stirred and mixed with the wastewater under aeration; 3. The risk of seed mud caking, clumping, or clogging pipelines and pumps can be predicted in advance. The wastewater to be treated in this invention preferably includes one or more of the following: oil refining wastewater, rubber wastewater, leather wastewater, papermaking wastewater, coal chemical wastewater, and dyeing and printing wastewater. The water mixing test in this invention is preferably conducted in a small-scale test device.

[0029] The present invention preferably involves COD testing of the seed mud to be selected. hardThe theoretical sludge age and the time required for wastewater to decrease from its original COD value to its minimum COD value were determined by measurement. The sludge deflocculation time and the time required for wastewater to transition from organic to inorganic forms were observed and determined, thereby determining the acclimatization period. The method for determining the acclimatization period includes: the minimum acclimatization period is less than the sludge deflocculation time and less than the time required for wastewater to transition from organic to inorganic forms; the maximum acclimatization period is less than the theoretical sludge age and less than or equal to the time required for wastewater to decrease from its original COD value to its minimum COD value. When the wastewater treated by this invention is wastewater from a certain industrial park in Hebei (a mixture of industrial park wastewater and domestic wastewater), specifically, the sludge deflocculation time is 18 days, the time for wastewater to transition from organic to inorganic forms is 22 days, the theoretical sludge age is 36 days, and the time for wastewater to decrease from its original COD value to an extremely low COD value (10 mg / L) is 26 days. Therefore, the acclimatization period is determined to be 15–26 days. When the type of wastewater being treated is different, or the source of the seed sludge is different, the acclimatization period needs to be recalculated.

[0030] After determining the acclimatization period, this invention inoculates seed sludge, adds wastewater, and acclimatizes to obtain sludge. The acclimatization preferably includes gradually increasing the load intensity until the sludge can adapt to an influent load of 110-120%. In this invention, the inoculation amount is preferably 3-5 g / L. This invention preferably determines the MLSS dosage based on the seed sludge selection results, combined with microbial proliferation and metabolism. Specifically: when the microbial count is 650 cells / ml, the original-to-post ratio is 13:1, the activity level is 80%, and the ratio of large microorganisms is 70%, add 5 g / L; when the microbial count is 800 cells / ml, the original-to-post ratio is 10:1, the activity level is 85%, and the ratio of large microorganisms is 75%, add 4 g / L; when the microbial count is 950 cells / ml, the original-to-post ratio is 8:1, the activity level is 90%, and the ratio of large microorganisms is 80%, add 3 g / L. In this invention, the acclimatization preferably includes the following stages: sludge inoculation stage, initial system startup stage, sludge acclimatization and load increase stage, and trial operation and acceptance stage. In this invention, the sludge inoculation stage lasts 2 days, the initial system startup stage lasts 2 days, the sludge acclimatization and load increase stage lasts 9-20 days, and the trial operation and acceptance stage lasts 2 days. In this invention, the gradual increase in load intensity preferably includes: increasing the wastewater volume in increments of 10-20%, ultimately enabling the sludge to adapt to an influent load of 110-120%. In this invention, the acclimatization days for each stage are preferably 1-2 days, 1-3 days, 2-3 days, 2-5 days, and 3-7 days, respectively. In this invention, the trial operation and acceptance stage preferably involves "perfecting system operating parameters and dosage to ensure effluent meets standards. Upon completion of the trial operation, an application for environmental acceptance and environmental sampling monitoring is submitted." In this invention, the acclimatization process preferably also includes microscopic examination, full-process evaluation, feedback, and optimization to ensure process control and guarantee that the sludge during acclimatization meets the selection criteria for high-quality seed sludge. In this invention, the process control method preferably includes sludge replenishment and / or increasing the wastewater volume.

[0031] After acclimatization, the present invention is used for wastewater treatment, controlling the 30-minute settling ratio at 35-45%, the sludge concentration at 5-5.5 g / L, the dissolved oxygen at 1.5-2.5 mg / L, the sludge return ratio at 80-100%, and the mixed liquor return ratio at 200-300%. In the present invention, after acclimatization, it is preferable to measure the 30-minute settling ratio, sludge concentration, dissolved oxygen, sludge return ratio, and mixed liquor return ratio every 1-3 days.

[0032] The operating methods and conditions other than the rapid acclimatization method for sewage sludge in the present invention are not particularly limited, and conventional operations in sewage treatment processes known to those skilled in the art can be used.

[0033] To further illustrate the present invention, the following detailed description of a rapid acclimatization method for sewage treatment plant sludge provided by the present invention is provided in conjunction with embodiments, but these descriptions should not be construed as limiting the scope of protection of the present invention.

[0034] Example 1

[0035] Selecting high-quality seed mud

[0036] The selected seed mud was subjected to sludge microscopic examination using quantitative observation methods.

[0037] Determine the number of microorganisms (the total number of microorganisms per milliliter should not be less than 650);

[0038] Protozoa: Metazoa ratio not exceeding 20:1;

[0039] Activity level (the proportion of active microorganisms is not less than 70%);

[0040] Size (medium and large microorganisms account for no less than 70%);

[0041] Color, as well as appearance indices such as the density and color of the bacterial flocs;

[0042] Table 2 Sludge Microscopic Examination Record Sheet

[0043]

[0044]

[0045] The sludge originated from a water plant in Hebei Province. Through testing, the number of microorganisms, the ratio of primary to secondary microorganisms, their activity, and apparent index all met the selection criteria for seed sludge, thus allowing for subsequent water distribution tests.

[0046] A water mixing test was conducted on the proposed sludge. In a small-scale test device, based on the characteristics of the water to be treated (industrial park wastewater mainly includes food processing (chili, corn) wastewater, dyeing and printing wastewater, etc.), water samples were added (COD peak 800 mg / L, usually below 350 mg / L; ammonia nitrogen peak 50 mg / L, usually around 30 mg / L; TP peak 30 mg / L, usually 12 mg / L; TN peak 70 mg / L, usually 50 mg / L; water flow peak 450 T / h, usually around 300-350 T / h). The reaction time, water quality, and sludge changes were recorded to test the sludge's adaptability. The reaction time was 8 hours, the sludge concentration was controlled at 5 g / L, and DO did not exceed 2 mg / L. Intermittent aeration was used. After 8 hours, the COD removal rate reached 75%, the ammonia nitrogen removal rate was 95%, and the TP and TN removal rates both exceeded 50%. The sludge color, floc density, ratio of large insects, and activity level all meet the above standards, indicating that the seed sludge's adaptability is suitable. The next step, COD testing, can proceed. hard Measurement

[0047] COD of the selected seed mud was tested. hard The acclimatization period was determined by measuring and recording the sludge deflocculation time, the organic-to-inorganic conversion time, the theoretical sludge age, and the minimum COD value. The acclimatization time was 18 days, the organic-to-inorganic conversion time was 22 days, the theoretical sludge age was 36 days, and the time for the COD value to be less than 10 mg / L was 26 days. The final acclimatization period was determined to be 15–26 days. The minimum acclimatization period needed to be less than the sludge deflocculation time and the inorganic conversion time, and the maximum needed to be less than the theoretical sludge age and less than or equal to the time for the COD value to be less than 10 mg / L.

[0048] Process control during the domestication stage

[0049] After selecting the sludge, a sludge acclimation plan is developed based on the characteristics of the water to be treated and the process features. Taking a wastewater treatment plant in a Hebei industrial park as an example (where industrial park wastewater and domestic sewage are mixed), the sludge acclimation process is explained in detail:

[0050] 1. Overview of the Water Plant

[0051] The treatment process adopted by the plant is as follows: coarse-fine screen, vortex grit chamber, equalization tank, primary sedimentation tank, biological treatment tank-secondary sedimentation tank, high-density tank, fiber disc, and ultraviolet disinfection. The effluent is discharged externally, and the sludge is dewatered by plate and frame dewatering and then transported externally.

[0052] 2. Conventional sludge acclimation program

[0053] According to production requirements, the MLSS of biochemicals should be set between 4 and 6 g / L, and the addition time should be completed within 3 to 7 days to ensure the freshness and activity of the seed mud and reduce the deterioration caused by excessive accumulation of seed mud.

[0054] 2.1 System Startup

[0055] After the sludge is added to the biological treatment tank (with the liquid level in the tank not exceeding 1 / 2), monitor the dissolved oxygen level in the tank during aeration. Observe the color of the activated sludge; it should change from black to brown / brown, a process that takes approximately 1-3 days. If it does not change color, continue aeration until the sludge changes color and obvious flocs are formed. Observe the sludge activity under a microscope. After the sludge activity recovers, continue or intermittently inject wastewater into the tank. During this stage, intermittent water intake is generally adopted, with the intake volume determined according to the activity of microorganisms in the system (intake at the minimum load) (the original tank contains 1 / 2 water; add about 20% each time, stop for 6 hours, then add water again until the tank is full). When the secondary sedimentation tank begins to discharge water (overflow from the secondary sedimentation tank), start the sludge scraper in the secondary sedimentation tank to connect the biological treatment tank and the secondary sedimentation tank for circulation, and start the sludge return system to return sludge to the biological treatment tank. In order to supplement nutrients and remove metabolic products harmful to microbial growth, the dilution water volume and nutrient salts should be added at full load.

[0056] Table 3. Conventional methods for acclimatizing sludge

[0057]

[0058]

[0059] 2.2 Sludge Cultivation and Acclimation

[0060] The purpose of sludge cultivation is to allow the added microbial strains to gradually adapt to the characteristics of the wastewater to be treated and to promote the proliferation of microorganisms, thereby achieving the required sludge concentration.

[0061] 1) In the cultivation and acclimatization stage, in order to cultivate microorganisms suitable for the reproduction and growth of this wastewater as soon as possible, add various nutrients according to the nutrient ratio required by microorganisms in sludge BOD:N:P = 100:5:1.

[0062] 2) When the COD removal rate of the effluent from the biological treatment tank reaches 60%, the 30-minute settling ratio of the mixed liquor reaches 10-30%, and the sludge properties of the aeration tank are checked, and the sludge settling performance is good, and a large number of bacterial flocs and sessile ciliates and protozoa are observed under a microscope, it indicates that the cultivation of bacteria is successful and the load increase stage can begin.

[0063] 3) Observation and evaluation of activated sludge

[0064] A. Observation of activated sludge properties: During operation, observe the color and odor of the sludge. Normal activated sludge is generally yellow (brown) brown with a slightly damp earthy smell. When aeration and oxygenation are insufficient, the sludge turns black and smells foul. When aeration and oxygenation are too low or the load is too low, the sludge color will be lighter. Testing and analysis of sludge performance indicators: In the activated sludge treatment system, the sludge concentration, settling ratio, and volume index should be tested and analyzed in a timely manner to determine the operating status.

[0065] B. Observation of the biological phase of activated sludge:

[0066] Observing the biological phase of activated sludge treatment systems is now commonly done through operational status monitoring. This observation helps to understand the types and abundance of microorganisms in the activated sludge, allowing for timely monitoring of changes in the biological phase and assessment of operational status and treatment effectiveness.

[0067] a. Changes in biological species: The types of microorganisms in sludge change with water quality and operational stages. As activated sludge gradually forms and the effluent changes from turbid to clear, the types of microorganisms in the sludge undergo a regular replacement, playing an indicative role in operation. For example, when the sludge is loose, a large increase in motile ciliates is commonly seen. When the effluent is turbid, the number of amoebas and flagellates (protozoa) increases significantly.

[0068] b. The state of microbial activity: When water quality changes, the activity of microorganisms changes, and even the shape of microorganisms changes with the wastewater. Taking Vorticella as an example, one can observe the speed of its ciliary movement, whether a large number of food vacuoles accumulate in its body, the size and contraction of contractile vacuoles, and its reproduction. When the dissolved oxygen in the water is too high or too low, a vacuole can be seen protruding from the "head" of the Vorticella; when there are too many recalcitrant substances in the influent or the temperature is too low, undigested particles can be seen accumulating in the Vorticella and it will be in an inactive state, eventually leading to poisoning and death; when the pH value changes abruptly, the cilia of the Vorticella will stop moving.

[0069] c. Changes in the number of microorganisms: Activated sludge contains many types of microorganisms, but changes in the number of some microorganisms can reflect changes in water quality. The presence of flagellates in activated sludge indicates that the sludge is beginning to grow and reproduce, and a large number of flagellates reflects a decrease in treatment efficiency. The large presence of Vorticella indicates that the activated sludge has matured, at which point the treatment effect is very good, and a small number of rotifers may also appear. If a large number of rotifers appear, it indicates that the sludge is aging or over-oxidized, subsequently leading to sludge disintegration and deterioration of water quality.

[0070] The microorganisms in the activated sludge were observed using an optical microscope. Low magnification was used to observe the state of the sludge flocs; high magnification was used to observe the state of the microorganisms. This process took approximately 10 days.

[0071] Conventional methods merely observe the above indicators without establishing a link between these indicators and seed mud or sludge.

[0072] 2.3 Load Increase

[0073] The daily water treatment capacity is approximately 10,000 m³. 3The load increase should be determined based on actual operating conditions, avoiding excessively rapid increases, while also considering the concentration and total amount of NH3-N. The following points should be noted during the system startup phase:

[0074] The water quality entering the system is monitored more closely to reduce the impact of water quality fluctuations.

[0075] The influent is adjusted according to the biodegradability of the wastewater.

[0076] To create a suitable environment for microbial growth, various nutrients should be added in relative proportions to meet the needs of microbial growth.

[0077] Each load increase is carried out by 30%. After each increase, the system runs stably for 3 to 5 days. When the COD removal rate reaches more than 80%, continue to increase it by 20 to 30% until full load is reached.

[0078] During operation, the sludge return system can be started when SV30 reaches 15-25%. The mixed liquor (sludge and wastewater) return ratio can be adjusted (200-400%) based on the system's ammonia nitrogen removal efficiency. If the load increase is significant, the system can be stabilized or the load reduced to restore operation before further increases.

[0079] Reference indicators for process control during commissioning:

[0080]

[0081] 3. Differences between this invention and conventional sludge acclimation schemes

[0082] 3.1 Based on the results of the seed mud selection, combined with the microbial proliferation and metabolism, the final MLSS dosage was determined, and the specific dosage ratio is as follows: 4 g / L.

[0083] 3.2 Process control of the acclimatization cycle.

[0084] After sludge addition, by controlling the acclimatization period and load intensity (gradually increasing the load in increments of 30%, 50%, 70%, 90%, and 120%), the shock resistance and resilience of the sludge are comprehensively improved, significantly shortening the entire sludge treatment time. Throughout the acclimatization period, quantitative sludge microscopic examination methods are used to evaluate, provide feedback, and optimize the process control (sludge replenishment and increased water volume).

[0085] Table 4. Sludge acclimation method of the present invention

[0086]

[0087] Note: Zone A: a general term for anaerobic zone and hypoxic zone (facultative anaerobic); Zone O: aerobic zone.

[0088] 3.3 Analysis of the effects after domestication

[0089] Process control parameters: Measured every 1-3 days.

[0090] SV30 35-45%

[0091] With MLSS levels of 5–5.5 g / L, it saves on sludge procurement, transportation, and addition costs.

[0092] With a DO concentration of 1.5–2.5 mg / L, excessive airflow consumption is reduced, saving on electricity costs.

[0093] A sludge recirculation ratio of 80-100% lays the foundation for maintaining the sludge's shock resistance;

[0094] A mixed liquor reflux ratio of 200-300% lays the foundation for maintaining the resilience of sludge;

[0095] Table 5 shows a comparison of relevant data on the sludge acclimatization period.

[0096] Table 5 Comparison of the domestication effects of the present invention and conventional methods.

[0097]

[0098] The results show that:

[0099] This invention quantifies the selection criteria for seed mud, laying the foundation for sludge acclimatization;

[0100] This invention enhances the effectiveness of sludge during acclimation through process control, and conducts full-process evaluation, feedback, and optimization.

[0101] By conducting shock adaptation tests within a controlled range, the impact resistance and resilience of the sludge are improved, enhancing its "endurance" and vitality. This invention significantly shortens the sludge acclimatization process.

[0102] Although the above embodiments have provided a detailed description of the present invention, they are only some embodiments of the present invention, and not all embodiments. People can obtain other embodiments based on these embodiments without creative effort, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A rapid acclimatization method for sewage treatment plant sludge, characterized in that, Includes the following steps: Select high-quality seed mud; the selection criteria for high-quality seed mud include: total microbial count not less than 650 individuals / mL, protozoan to metazoan ratio not more than 20:1, activity level not less than 70%, proportion of medium and large microorganisms not less than 70%, brown color and compact density of bacterial flocs. Perform COD hard The theoretical sludge age and the time required for wastewater to decrease from its original COD value to its minimum COD value are determined by measurement. The sludge deflocculation time and the time required for wastewater to change from organic to inorganic are observed and determined, thereby determining the acclimatization period. The method for determining the acclimatization period includes: the minimum value of the acclimatization period is less than the sludge deflocculation time and less than the time required for wastewater to change from organic to inorganic; the maximum value is less than the theoretical sludge age and less than or equal to the time required for wastewater to decrease from its original COD value to its minimum COD value. The process involves inoculating seed sludge, adding wastewater, and acclimatizing the sludge to obtain it. Acclimatization includes gradually increasing the load intensity until the sludge can adapt to an influent load of 110-120%. This gradual increase in load intensity includes gradually increasing the wastewater volume in increments of 10-20%, ultimately enabling the sludge to adapt to an influent load of 110-120%. The acclimatization process also includes microscopic examination, continuous evaluation, feedback, and optimization to ensure the sludge meets the selection criteria for high-quality seed sludge. Process control methods include adding sludge and / or increasing the wastewater volume. The acclimatization process includes the following stages: sludge inoculation stage, initial system startup stage, sludge acclimatization and load increase stage, and trial operation and acceptance stage. After acclimatization, wastewater treatment is carried out, with the following parameters controlled: 30-minute settling ratio of 35-45%, sludge concentration of 5-5.5 g / L, dissolved oxygen of 1.5-2.5 mg / L, sludge return ratio of 80-100%, and sludge-to-wastewater mixed liquor return ratio of 200-300%.

2. The rapid acclimatization method according to claim 1, characterized in that, After selecting high-quality seed mud, a water mixing test is also conducted. The water mixing test involves mixing the seed mud with the wastewater to be treated, recording the reaction time, water quality, and changes in sludge, in order to test the adaptability of the sludge.

3. The rapid acclimatization method according to claim 1, characterized in that, The acclimatization period is 15–26 days.

4. The rapid acclimatization method according to claim 1, characterized in that, The sludge inoculation stage lasts for 2 days, the initial system startup stage lasts for 2 days, the sludge acclimatization and load increase stage lasts for 9 to 20 days, and the trial operation and acceptance stage lasts for 2 days.

5. The rapid acclimatization method according to claim 1, characterized in that, The acclimatization days for each level are 1-2 days, 1-3 days, 2-3 days, 2-5 days, and 3-7 days, respectively.

6. The rapid acclimatization method according to claim 1, characterized in that, After acclimatization, the 30-minute settling ratio, sludge concentration, dissolved oxygen, sludge return ratio, and mixed liquor return ratio were measured every 1 to 3 days.

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