Method and system for treating cream wastewater

Abstract

The invention relates to the technical field of dairy product wastewater treatment, and discloses a method and system for treating cream wastewater, and the method comprises the following steps: removing precipitates and suspended solids in the cream wastewater by using a screen to obtain wastewater I; combining the wastewater I with micro-nano bubbles through a dissolved air pump, a gas-liquid separation tank and a micro-nano bubble spray head, floating the wastewater I and the micro-nano bubbles in a water treatment pond to form foams, and removing the foams to obtain wastewater II; combining the temperature-sensitive microgel with the wastewater II to obtain a wastewater material composite system, carrying out multi-action and self-learning updating time ultrasonic treatment on the composite system through an ultrasonic treatment tank, and obtaining wastewater III with reduced particle size, enhanced solubility and stability and reduced viscosity after a termination condition is reached; carrying out multi-stage filtration on the wastewater III, and finally obtaining a concentrated solution and a permeate III meeting the discharge standard; and drying the concentrated solution for recycling. The device is free of secondary pollution and good in water treatment effect, the working efficiency is improved, and the cost is saved.

Description

Technical Field

[0001] This invention relates to the field of dairy wastewater treatment technology, and more specifically, to a method and system for treating butter wastewater. Background Technology

[0002] The production and processing of cream generates a large amount of wastewater. Cream wastewater primarily originates from dairy processing (such as butter and cream production), as well as process cleaning, equipment rinsing, and production waste. This type of wastewater has a complex composition, rich in functional substances such as fats, proteins, and polysaccharides, and exhibits significant "three highs": high chemical oxygen demand (CODcr), high fat content, and high suspended solids (SS). Specifically, its pollutants mainly include milk proteins, lactose, fats, various food additives (such as stabilizers and emulsifiers), and large amounts of insoluble fats and particulate matter.

[0003] Because butter is an oil-in-water emulsion, the oil in its wastewater exists mostly in a stable emulsion state, making oil-water separation extremely difficult. If butter wastewater is discharged directly without effective treatment, it not only wastes resources but also clogs urban sewer systems, severely impacting the subsequent biological treatment systems of urban wastewater treatment plants, leading to decreased treatment efficiency or even system collapse.

[0004] Currently, most treatments for butter wastewater employ a conventional combination of pretreatment and biological treatment processes, but these methods present numerous problems in actual operation:

[0005] (1) Low efficiency and poor stability in the pretreatment stage. Conventional oil separators can only remove floating oil, and their effect on treating emulsified oil in butter wastewater is negligible. Although coagulation and flotation are commonly used demulsification and oil removal methods, they have problems such as large dosage, high operating costs, and sensitivity to pH and temperature, due to the highly stable emulsification characteristics of butter wastewater. Incomplete demulsification will lead to a large number of fine oil droplets and colloidal substances entering subsequent units, creating hidden dangers for biological treatment. Solid particles in wastewater are prone to deposit in equalization tanks and pipelines, causing blockages. Physical interception facilities such as bar screens need to be cleaned frequently, and the intercepted waste residue has a high oil content, making it difficult to treat and dispose of, and easily causing putrefaction and secondary pollution.

[0006] (2) The biochemical treatment stage has weak resistance to shock loads and unstable efficiency. Residual oils entering the biochemical system in wastewater will coat the surface of microbial flocs, hindering the transfer of oxygen and nutrients and inhibiting microbial activity. More seriously, the oils are hydrolyzed into long-chain fatty acids in an anaerobic environment, which have a strong toxic effect on anaerobic microorganisms such as methanogens, leading to a decrease in the efficiency of the anaerobic reactor or even failure. In the aerobic stage, oils will cause the activated sludge to become hydrophobic and deteriorate in settling performance, resulting in serious sludge floating and loss. The production and processing of butter is intermittent and batch-based, resulting in large fluctuations in wastewater volume and quality. Traditional biochemical processes such as activated sludge processes are poorly adapted to such shock loads, which can easily cause system instability and make it difficult to consistently meet the effluent quality standards. Butter wastewater is usually very high in carbon sources (as COD) and relatively deficient in nutrients such as nitrogen and phosphorus, resulting in an imbalance in the carbon, nitrogen, and phosphorus ratio. If no external addition is made to adjust the ratio, it will seriously affect the normal metabolism and proliferation of microorganisms.

[0007] (3) If the particle size of the emulsified oil droplets is not effectively reduced and the dispersion stability is not improved, the fine oil droplets will re-aggregate in the biochemical system, forming a floating oil layer or adhering to the packing / membrane surface, inducing scaling and clogging in the anaerobic section and foaming and sludge expansion in the aerobic section; for enhanced processes such as membrane bioreactors, it will also accelerate membrane fouling, leading to an increase in transmembrane pressure difference, an increase in cleaning frequency and a shortening of the operating cycle.

[0008] (4) High overall operating costs and low resource utilization. Existing treatment processes generally suffer from high reagent consumption, high energy consumption (especially in the flotation and aeration stages), and expensive treatment costs for oily sludge. At the same time, existing technologies mainly focus on the "removal" of pollutants, while not giving sufficient consideration to the recovery and utilization of organic matter (such as oils and proteins) and energy contained in wastewater, thus failing to achieve the resource utilization goal of turning waste into treasure.

[0009] There are currently no effective solutions to the problems in the relevant technologies. Summary of the Invention

[0010] In view of the problems in the related technologies, the present invention proposes a method and system for treating butter wastewater to overcome the above-mentioned technical problems existing in the existing related technologies.

[0011] Therefore, the specific technical solution adopted by the present invention is as follows:

[0012] According to a first aspect of the present invention, a method for treating butter wastewater is provided, comprising:

[0013] S1. Use a sieve to remove sediment and suspended solids from the cream wastewater to obtain wastewater I;

[0014] S2. Wastewater I is combined with micro-nano bubbles through a dissolved air pump, a gas-liquid separation tank and a micro-nano bubble nozzle, and the bubbles float to the surface in the water treatment tank to form foam. After removing the foam, wastewater II is obtained.

[0015] S3. Combine the temperature-sensitive microgel with wastewater II to obtain a wastewater material composite system. Perform ultrasonic treatment on the composite system with multiple actions and self-learning update time through an ultrasonic treatment tank. After reaching the termination condition, wastewater III with reduced particle size, enhanced solubility and stability, and decreased viscosity is obtained.

[0016] S4. Wastewater III is subjected to multi-stage filtration to finally obtain concentrated liquid and permeate III that meets the discharge standards;

[0017] S5. The concentrate is dried and then recycled.

[0018] Furthermore, through a dissolved air pump, a gas-liquid separation tank, and micro / nano bubble nozzles, wastewater I is combined with micro / nano bubbles and floats to the surface in the water treatment tank to form foam. After removing the foam, wastewater II is obtained, which includes:

[0019] Wastewater I enters the water treatment tank and the dissolved air pump is started to draw wastewater I into the dissolved air pump. After mixing with the wastewater I by drawing in air, it enters the gas-liquid separation tank and is discharged into the water treatment tank through micro-nano bubble nozzles.

[0020] The substances in wastewater I combine with micro-nano bubbles and float to the surface to form foam. The foam is scraped off by a foam scraping device and collected in a foam collection tank. After the foam is scraped off, wastewater II is obtained.

[0021] Furthermore, the temperature-sensitive microgel was combined with wastewater II to obtain a wastewater material composite system. The composite system was then subjected to multi-action ultrasonic treatment with a self-learning update time in an ultrasonic treatment tank. After reaching the termination condition, wastewater III with reduced particle size, enhanced solubility and stability, and decreased viscosity was obtained, including:

[0022] Wastewater II is introduced into an ultrasonic treatment tank, and a thermosensitive microgel with a lower critical dissolution temperature is stirred evenly with wastewater II, so that the thermosensitive microgel forms a dispersed phase in the aqueous phase that can provide steric stability, and a wastewater material composite system is obtained.

[0023] The ultrasonic treatment tank is equipped with Action 1 and Action 2. Action 1 is a first-power pulse ultrasound, used to mix and rearrange the interface of the wastewater material composite system. Action 2 is a second-power pulse ultrasound, used to cavitation breakup and depolymerization of the wastewater material composite system. At the same time, an upper temperature limit constraint is configured.

[0024] The wastewater material composite system is subjected to the second power pulse ultrasound action. Under the condition that the temperature does not exceed the upper limit of the temperature, the fat droplets and protein aggregates are broken by cavitation micro-jet and the temperature-sensitive microgel clusters are depolymerized until the median particle size of the volume distribution of the wastewater material composite system decreases to the target threshold, and a finely dispersed composite system with a reduced median particle size of the volume distribution is obtained.

[0025] The action of performing first-power pulsed ultrasound on the finely dispersed composite system causes the thermosensitive microgel and whey protein to complete adsorption and rearrangement at the new interface and establish a sterically hindered stable layer, resulting in a low-particle-size composite system with enhanced stability and apparent solubility.

[0026] The shear apparent viscosity of the low particle size composite system is measured. When the shear apparent viscosity decreases to the threshold and the particle size, turbidity, and Zeta potential are all kept within the target range, the ultrasonic treatment is terminated. Otherwise, the correction cycle is performed in the order of action two plus action one. Finally, wastewater III with reduced particle size, enhanced solubility and stability, and decreased viscosity is obtained.

[0027] The system records the cumulative time of Action 2, the cumulative time of Action 1, the validity label, and the safety constraint label for each batch, and uses a self-learning update algorithm to update the initial duration of Action 2 and the initial duration of Action 1 for the next batch.

[0028] Furthermore, the cumulative time of Action 2, the cumulative time of Action 1, the validity label, and the safety constraint label are recorded for each batch. A self-learning update algorithm is then used to update the initial duration of Action 2 and the initial duration of Action 1 for the next batch, including:

[0029] Record the cumulative time of Action 2 and Action 1 for the current batch, as well as the current batch's compliance flag and whether the current batch's temperature has reached the upper limit flag;

[0030] Use the standard-compliance mark as an effectiveness label, and the temperature limit mark as a safety constraint label;

[0031] When the validity label is met, the cumulative time of action 2 and the cumulative time of action 1 are used as the observation values ​​for the required time of action 2 and action 1 in the next batch; when the validity label is not met, the cumulative time of action 2 and the cumulative time of action 1 are used as the lower bound reference value for the required time of action 2 in the next batch and the infeasible reference value for the required time of action 1.

[0032] When the target is met, the initial duration setting value of the next batch of action 2 and the initial duration setting value of the next batch of action 1 are updated by exponential weighted moving average to obtain the initial duration of action 2 and the initial duration of action 1 of the next batch after self-learning update.

[0033] If the target is not met, a preset conservative increment is applied to the initial duration setting value of the next batch of action 2, while the initial duration setting value of the next batch of action 1 remains unchanged, resulting in the initial duration of action 2 and the initial duration of action 1 of the next batch after being updated according to the conservative rule for not meeting the target.

[0034] Based on safety constraints and boundary conditions, the initial duration of Action 2 in the next batch is modified and checked against the initial duration of Action 1 to obtain the executable initial duration of Action 2 in the next batch and the initial duration of Action 1.

[0035] Furthermore, based on safety constraints and boundary conditions, the initial duration of Action 2 in the next batch is corrected and checked against the initial duration of Action 1, including:

[0036] When the temperature reaches the upper limit mark, the initial duration of the second action in the next batch is reduced to decrease the cavitation heat load, and the reduction correction amount is transferred to the initial duration of the first action in the next batch according to a preset ratio, so as to obtain the initial duration of the second action and the initial duration of the first action in the next batch that meet the upper limit temperature constraint.

[0037] A boundary check is performed on the initial duration of Action 2 for the next batch that meets the upper temperature limit constraint, compared with the initial duration of Action 1, to ensure that the minimum pulse duration and maximum continuous operation duration allowed by the ultrasonic treatment tank are met.

[0038] Furthermore, upon achieving the target, the initial duration settings for the next batch of actions (Action 2) and the initial duration settings for the next batch of actions (Action 1) are updated using an exponentially weighted moving average, including:

[0039] Read the cumulative time of Action 2 and the cumulative time of Action 1 in this batch, as well as the old initial setting value used for the next batch;

[0040] Configure weighting coefficients, combine the cumulative time of action 2, the cumulative time of action 1, and the old initial setting value used for the next batch, and calculate the initial duration of action 2 and the initial duration of action 1 for the next batch.

[0041] According to a second aspect of the present invention, a system for treating butter wastewater is also provided, comprising:

[0042] The primary treatment module is used to remove sediment and suspended solids from the cream wastewater using a screen, resulting in Wastewater I;

[0043] The secondary treatment module is used to combine wastewater I with micro-nano bubbles and form foam by floating in the water treatment tank. After removing the foam, wastewater II is obtained.

[0044] The three-stage treatment module is used to combine the temperature-sensitive microgel with wastewater II to obtain a wastewater material composite system. The composite system is subjected to ultrasonic treatment with multiple actions and self-learning update time through an ultrasonic treatment tank. After reaching the termination condition, wastewater III with reduced particle size, enhanced solubility and stability, and decreased viscosity is obtained.

[0045] The four-stage treatment module is used to perform multi-stage filtration on wastewater III, and finally obtain concentrated liquid and permeate III that meets the discharge standards.

[0046] The recovery module is used to dry and recycle the concentrate.

[0047] Furthermore, the secondary treatment module includes a water treatment tank, with a dissolved air pump and a gas-liquid separator installed at the bottom of the water treatment tank, a micro-nano bubble nozzle installed above the gas-liquid separator, and a foam scraping device installed above the micro-nano bubble nozzle.

[0048] A foam collection tank is connected to one side of the water treatment tank, and a water pump II is installed between the water treatment tank and the tertiary treatment module.

[0049] Furthermore, the third-level processing module includes an ultrasonic processing tank, which is equipped with a power ultrasonic device and a stirrer. A water pump III is installed between the ultrasonic processing tank and the fourth-level processing module.

[0050] Furthermore, the four-stage treatment module includes vibrating membrane device I, vibrating membrane device II, and vibrating membrane device III, wherein the membrane pack of vibrating membrane device I is an ultrafiltration membrane pack, the membrane pack of vibrating membrane device II is a nanofiltration membrane pack, and the membrane pack of vibrating membrane device III is a reverse osmosis membrane pack.

[0051] According to a third aspect of the present invention, a computer device is provided.

[0052] The computer device includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps of the above method.

[0053] According to a fourth aspect of the present invention, a computer-readable storage medium is provided.

[0054] The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the above method.

[0055] The beneficial effects of this invention are as follows:

[0056] (1) The present invention uses a physical method throughout the entire process, without adding chemicals and causing no secondary pollution. It fully recovers and utilizes the organic matter (such as oils and proteins) contained in the wastewater, achieving the goal of turning waste into treasure.

[0057] (2) The method for treating cream wastewater provided by the present invention first removes suspended solids and precipitates from the cream wastewater through a screen for primary treatment, and then performs secondary treatment (micro-nano bubble treatment) through a secondary treatment module, so that denatured whey protein, some casein micelles, fat globules and fat globule membrane substances in the wastewater are separated as foam. Then, it performs tertiary treatment through a tertiary treatment module, so that the substances in the wastewater react. After primary treatment, secondary treatment and tertiary treatment, the fat content of the wastewater is reduced, the particle size of the substances in the water is reduced, the solubility and stability of the substances are enhanced, and the viscosity of the water is reduced, which greatly reduces the difficulty of quaternary treatment (vibrating membrane filtration). The present invention can greatly reduce the BOD value, COD value, SS value and ammonia nitrogen value of the cream processing wastewater, realize the recycling of cream wastewater resources, and has the advantages of simple and feasible operation, low energy consumption and good water treatment effect.

[0058] (3) The secondary treatment of this invention uses micro-nano bubble treatment instead of the traditional air flotation process. Micro-nano bubbles have different characteristics from ordinary bubbles. Due to their smaller particle size and huge surface area, they improve the mass transfer efficiency of gas in water, providing a huge interface for chemical reactions, gas dissolution, and pollutant adsorption. They also achieve long-term retention of gas in liquid, avoiding the rapid escape of ordinary large bubbles, so that the gas can be fully and effectively utilized. At the same time, the active oxygen generated by the interface contraction effect and collapse can non-selectively degrade organic pollutants in water and kill bacteria and viruses. Compared with the traditional bubble air flotation process, the micro-nano bubble process reduces the treatment load of subsequent treatment processes and has the advantages of convenient operation and management, low operating cost, and no secondary pollution.

[0059] (4) Decouple action 2 from action 1 and execute them in a closed loop in the order of first breaking and then stabilizing. Under the constraint of the upper limit of temperature, both particle size reduction and interface restabilization are taken into account, so as to avoid overheating, re-aggregation or irreversible degradation of protein structure caused by single strong ultrasound.

[0060] (5) Improved water treatment efficiency: The strong shear force generated on the membrane by the vibrating membrane device can prolong the membrane clogging time, effectively prevent the deposition of particulate pollutants on the membrane surface, improve working efficiency, and save costs. Attached Figure Description

[0061] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0062] Figure 1 This is a flowchart of a method for treating butter wastewater according to an embodiment of the present invention;

[0063] Figure 2 This is a system module diagram for treating butter wastewater according to an embodiment of the present invention;

[0064] Figure 3 This is a schematic diagram of a system for treating butter wastewater according to an embodiment of the present invention;

[0065] Figure 4 This is a flowchart of the cream wastewater treatment process according to an embodiment of the present invention;

[0066] Figure 5 This is a schematic diagram of the structure of a computer device according to an embodiment of the present invention.

[0067] In the picture:

[0068] 1. Primary Processing Module; 11. Screen; 12. Temporary Storage Tank I; 13. Water Pump I; 2. Secondary Processing Module; 21. Dissolved Air Pump; 22. Gas-Liquid Separator; 23. Micro / Nano Bubble Nozzle; 24. Foam Scraping Device; 25. Water Treatment Tank; 26. Foam Collection Tank; 27. Water Pump II; 3. Tertiary Processing Module; 31. Power Ultrasonic Device; 32. Stirrer; 33. Ultrasonic Treatment Tank; 34. Water Pump III; 4. Quaternary Processing Module; 41. Temporary Storage Tank II; 42. Water Pump IV; 43. Vibrating Membrane Device I; 44. Temporary Storage Tank III; 45. Water Pump V; 46. Vibrating Membrane Device II; 47. Temporary Storage Tank IV; 48. Water Pump VI; 49. Vibrating Membrane Device III; 410. Temporary Storage Tank V; 5. Recovery Module. Detailed Implementation

[0069] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0070] According to an embodiment of the present invention, a method and system for treating butter wastewater are provided.

[0071] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1 As shown, according to one embodiment of the present invention, a method for treating butter wastewater is provided, comprising:

[0072] S1. Use screen 11 to remove sediment and suspended solids from the cream wastewater to obtain wastewater I.

[0073] S2. Wastewater I is combined with micro-nano bubbles through dissolved air pump 21, gas-liquid separation tank 22 and micro-nano bubble nozzle 23 and floats to the surface in the water treatment tank to form foam. After removing the foam, wastewater II is obtained.

[0074] S3. The temperature-sensitive microgel is combined with wastewater II to obtain a wastewater material composite system. The composite system is subjected to ultrasonic treatment with multiple actions and self-learning update time through ultrasonic treatment tank 33. After reaching the termination condition, wastewater III with reduced particle size, enhanced solubility and stability, and decreased viscosity is obtained.

[0075] S4. The wastewater III is subjected to multi-stage filtration, and finally a concentrated liquid and a permeate III that meets the discharge standards are obtained.

[0076] S5. The concentrate is dried and then recycled.

[0077] In one embodiment, wastewater I is combined with micro-nano bubbles via a dissolved air pump 21, a gas-liquid separator 22, and a micro-nano bubble nozzle 23, and the bubbles float to the surface in a water treatment tank 25 to form foam. After removing the foam, wastewater II is obtained, comprising:

[0078] Wastewater I enters the water treatment tank 25 and the dissolved air pump 21 is started to draw wastewater I into the dissolved air pump 21. After mixing with the wastewater I by drawing in air, it enters the gas-liquid separator 22 and is discharged into the water treatment tank 25 through the micro-nano bubble nozzle 23. The substances in wastewater I combine with the micro-nano bubbles and float to the surface to form foam. The foam is scraped off by the foam scraping device 24 and collected in the foam collection tank 26. After the foam is scraped off, wastewater II is obtained.

[0079] In one embodiment, temperature-sensitive microgels are combined with wastewater II to obtain a wastewater material composite system. The composite system is subjected to multi-action ultrasonic treatment with a self-learning update time in an ultrasonic treatment tank 33. After reaching the termination condition, wastewater III with reduced particle size, enhanced solubility and stability, and decreased viscosity is obtained, including:

[0080] Wastewater II is introduced into ultrasonic treatment tank 33, and a thermosensitive microgel with a lower critical dissolution temperature is stirred evenly with wastewater II, allowing the thermosensitive microgel to form a sterically stable dispersed phase in the aqueous phase, thus obtaining a wastewater material composite system. Ultrasonic treatment tank 33 is configured with two actions: Action 1 is a first-power pulsed ultrasound used to mix and rearrange the interface of the wastewater material composite system; Action 2 is a second-power pulsed ultrasound used to cavitation breakup and depolymerization of the wastewater material composite system. A temperature upper limit constraint is also configured. Action 2 of the second-power pulsed ultrasound is performed on the wastewater material composite system, using cavitation microjets to break up fat droplets and protein aggregates and depolymerize the thermosensitive microgel clusters, under the condition that the temperature does not exceed the upper limit, until the median particle size of the wastewater material composite system decreases to the target threshold or the rate of decrease approaches zero. A finely dispersed composite system with a reduced median particle size was obtained. Action one, using a first-power pulse ultrasound, was performed on the finely dispersed composite system to induce the thermosensitive microgel and whey protein to complete adsorption rearrangement at the new interface and establish a sterically hindered stable layer, resulting in a low-particle-size composite system with enhanced stability and apparent solubility. The shear apparent viscosity of the low-particle-size composite system was measured. Ultrasonic treatment was terminated when the shear apparent viscosity decreased to a threshold and the particle size, turbidity, and Zeta potential remained within the target range; otherwise, a correction cycle was performed in the order of Action two plus Action one, ultimately yielding wastewater III with reduced particle size, enhanced solubility and stability, and decreased viscosity. The cumulative time of Action two, the cumulative time of Action one, the validity label, and the safety constraint label for each batch were recorded, and a self-learning update algorithm was used to update the initial duration of Action two and Action one for the next batch.

[0081] In one embodiment, the cumulative time of action 2, the cumulative time of action 1, the validity label, and the safety constraint label for each batch are recorded, and the initial duration of action 2 and the initial duration of action 1 for the next batch are updated using a self-learning update algorithm, including:

[0082] Record the cumulative time of Action 2 and Action 1 for the current batch, as well as the current batch's compliance flag and whether the current batch's temperature has reached its upper limit flag. Use the cumulative time of Action 2 and Action 1 as the control consumption for this batch, the compliance flag as a validity label, and the temperature upper limit flag as a safety constraint label, integrating them to obtain a batch control record with validity and safety constraint labels. When the validity label is compliant, use the cumulative time of Action 2 and Action 1 as the observation values ​​for the required duration of Action 2 and Action 1 in the next batch. When the validity label is non-compliant, use the cumulative time of Action 2 and Action 1 as the lower bound reference value for the required duration of Action 2 in the next batch and the infeasible reference value for the required duration of Action 1. When compliance is achieved, for the next batch of actions... The initial duration settings for the second batch of actions and the initial duration settings for the next batch of actions are updated using exponentially weighted moving averages to obtain the initial durations for the second batch of actions and the first batch of actions after self-learning updates. If the target is not met, a preset conservative increment is applied to the initial duration settings for the second batch of actions to ensure the exploration of stronger fragmentation intensity. The initial duration settings for the first batch of actions are kept unchanged or only slightly adjusted to avoid excessive pursuit of interface rearrangement before solving the problem of excessively large particles. This results in the initial durations for the second batch of actions and the first batch of actions updated according to the conservative rule for not meeting the target. Based on safety constraints and boundary conditions, the initial durations for the second batch of actions and the first batch of actions are corrected and checked to obtain the executable initial durations for the second batch of actions and the first batch of actions.

[0083] In one embodiment, the correction and check of the initial duration of action two in the next batch compared with the initial duration of action one, based on safety constraints and boundary conditions, includes:

[0084] When the temperature reaches the upper limit, the initial duration of the second action in the next batch is reduced to decrease the cavitation heat load, and the reduction amount is transferred to the initial duration of the first action in the next batch according to a preset ratio, so as to obtain the initial duration of the second action and the initial duration of the first action in the next batch that meet the upper limit temperature constraint. Boundary checks are performed on the initial duration of the second action and the initial duration of the first action in the next batch that meet the upper limit temperature constraint to meet the minimum pulse duration and maximum continuous operation duration allowed by the ultrasonic treatment tank.

[0085] In one embodiment, upon achieving the target, performing an exponentially weighted moving average update on the initial duration setting value for the next batch of action two and the initial duration setting value for the next batch of action one includes:

[0086] Read the cumulative time of Action 2 and the cumulative time of Action 1 in this batch, as well as the old initial setting value currently used for the next batch; configure the weighting coefficient, and combine the cumulative time of Action 2, the cumulative time of Action 1, and the old initial setting value currently used for the next batch to calculate the initial duration of Action 2 and the initial duration of Action 1 in the next batch.

[0087] like Figure 2 and Figure 3 As shown, according to another embodiment of the present invention, a system for treating butter wastewater is also provided, comprising:

[0088] The primary treatment module 1 is used to remove sediment and suspended solids from the cream wastewater using a screen 11 to obtain wastewater I.

[0089] Secondary treatment module 2 is used to combine wastewater I with micro-nano bubbles and form foam by floating in water treatment tank 25. After removing the foam, wastewater II is obtained.

[0090] The third-level treatment module 3 is used to combine the temperature-sensitive microgel with wastewater II to obtain a wastewater material composite system. The composite system is subjected to ultrasonic treatment with multiple actions and self-learning update time through ultrasonic treatment tank 33. After reaching the termination condition, wastewater III with reduced particle size, enhanced solubility and stability, and decreased viscosity is obtained.

[0091] The fourth-stage treatment module 4 is used to perform multi-stage filtration on wastewater III, and finally obtain concentrated liquid and permeate III that meets the emission standards.

[0092] The recycling module 5 is used to dry and recycle the concentrate.

[0093] In one embodiment, the secondary processing module 2 includes a water treatment tank 25, with a dissolved air pump 21 and a gas-liquid separator 22 disposed at the bottom of the water treatment tank 25. A micro-nano bubble nozzle 23 is disposed above the gas-liquid separator 22, and a foam scraping device 24 is disposed above the micro-nano bubble nozzle 23. A foam collection tank 26 is connected to one side of the water treatment tank 25, and a water pump II is disposed between the water treatment tank 25 and the tertiary processing module 3.

[0094] In one embodiment, the third-level processing module 3 includes an ultrasonic processing tank 33, which is equipped with a power ultrasonic device 31 and a stirrer 32. A water pump Ⅲ 34 is provided between the ultrasonic processing tank 33 and the fourth-level processing module 4.

[0095] In one embodiment, the four-stage processing module 4 includes vibrating membrane device I 43, vibrating membrane device II 46, and vibrating membrane device III 49, wherein the membrane pack of vibrating membrane device I 43 is an ultrafiltration membrane pack, the membrane pack of vibrating membrane device II 46 is a nanofiltration membrane pack, and the membrane pack of vibrating membrane device III 49 is a reverse osmosis membrane pack.

[0096] To facilitate understanding of the above technical solutions of the present invention, the working principle of the present invention in actual process will be described in detail below.

[0097] Targeting the characteristics of butter wastewater, a highly efficient, stable, low-cost treatment technology and integrated system with resource recovery potential have been developed. Through purely physical methods, this system achieves efficient demulsification and oil removal, enhances pretreatment effects, and recovers energy and resources as much as possible.

[0098] Along the wastewater flow direction, the system includes a primary treatment module 1, a secondary treatment module, a tertiary treatment module 3, and a quaternary treatment module 4 connected in sequence. Wastewater treated by the primary treatment module 1 enters the secondary treatment module 2, then the tertiary treatment module 3, and finally the quaternary treatment module 4. Wastewater treated by the quaternary treatment module 4 is either recycled or directly discharged. Specifically, the inlet of the primary treatment module 1 is connected to the outlet of the cream wastewater, the outlet of the primary treatment module 1 is connected to the inlet of the secondary treatment module 2, the outlet of the secondary treatment module 2 is connected to the inlet of the tertiary treatment module 3, the outlet of the tertiary treatment module 3 is connected to the inlet of the quaternary treatment module 4, and the outlet of the quaternary treatment module 4 is connected to the outside.

[0099] The primary treatment module 1 removes suspended solids and sediments from the cream wastewater through filtration. The secondary treatment module 2 uses micro-nano bubbles with a large specific surface area, long residence time, and high surface activity as the core carrier. Through hydrophobic and electrostatic interactions, these bubbles actively "capture" surface-active substances such as fats and proteins in the water. Under the synergistic modification of bubble collapse, these substances form stable aggregates that float and accumulate to form a stable, dense foam layer that is easy to remove. The tertiary treatment module 3 uses high-power ultrasound to reduce the particle size, increase the solubility and stability, and decrease the viscosity of substances in the wastewater. The quaternary treatment module 4 separates as much water as possible from the wastewater and concentrates it to obtain a recyclable concentrate.

[0100] The primary treatment module 1 includes a screen 11, a temporary storage tank I 12, and a water pump I 13. Cream wastewater enters the primary treatment module 1 from the cream wastewater discharge outlet. Under gravity, the cream wastewater passes directly through the screen 11 into the temporary storage tank I 12. The screen 11 removes sediment and suspended solids from the cream wastewater, resulting in wastewater I in the temporary storage tank I 12 and filter residue retained on the screen 11. Wastewater I is then pumped from the outlet at the bottom of the temporary storage tank I 12 to the inlet of the secondary treatment module 2 via the water pump I 13. The bottom of the temporary storage tank I 12 is a smooth spherical surface, and the outlet is located at the lowest point of the bottom to prevent residue of wastewater I.

[0101] The secondary treatment module 2 includes a dissolved air pump 21, a gas-liquid separator 22, a micro-nano bubble nozzle 23, a foam scraping device 24, a water treatment tank 25, a foam collection tank 26, and a water pump II 27. Wastewater I enters the water treatment tank 25 from the primary treatment module 1 under the action of water pump I 13. The dissolved air pump 21 is started to draw wastewater I from the water treatment tank 25 into the dissolved air pump 21. By drawing in air and mixing it with wastewater I, it then enters the gas-liquid separator 22 and finally enters the water treatment tank 25 again through the micro-nano bubble nozzle 23. The above process is repeated to form a large number of micro-nano bubbles in the water treatment tank 25. Denatured whey protein, some casein micelles, fat globules, and fat globule membranes in wastewater I combine with the micro-nano bubbles and slowly float to the surface to form foam. The foam is scraped off the surface of the water by the foam scraping device 24 and collected in the foam collection tank 26. The wastewater remaining after the foam is scraped off is wastewater II. Wastewater II is pumped from the outlet at the bottom of water treatment tank 25 to the inlet of tertiary treatment module 3 via water pump II 27. The bottom of water treatment tank 25 has a smooth arc surface, and the outlet is located at the lowest point of the bottom to avoid the residue of wastewater II.

[0102] The dissolved air pump 21 has an inlet valve and a vacuum gauge at its inlet, a gas flow meter and a gas fine-tuning valve at its air inlet, an automatic exhaust valve at the top of the gas-liquid separator 22, and a pressure gauge and a pressure valve at its outlet.

[0103] The tertiary treatment module 3 includes a power ultrasonic device 31, a stirrer 32, an ultrasonic treatment tank 33, and a water pump 34. Wastewater II is pumped from the outlet at the bottom of the water treatment tank 25 by water pump 27 to the ultrasonic treatment tank 33 of the tertiary treatment module 3. The stirrer 32 is started to make wastewater II flow in the ultrasonic treatment tank 33, and then the power ultrasonic device 31 is started to perform ultrasonic treatment. Under the action of power ultrasound, the particle size of the substances in wastewater II decreases, the solubility and stability increase, and the viscosity decreases, resulting in wastewater III. Wastewater III is pumped from the outlet at the bottom of the ultrasonic treatment tank 33 by water pump 34 to the inlet of the tertiary treatment module 4. The bottom of the ultrasonic treatment tank 33 is a smooth spherical surface, and the outlet is located at the lowest point of the bottom to avoid the residue of wastewater III.

[0104] The fourth-stage treatment module 4 includes a temporary storage tank II 41, a water pump IV 42, a vibrating membrane device I 43, a temporary storage tank III 44, a water pump V 45, a vibrating membrane device II 46, a temporary storage tank IV 47, a water pump VI 48, a vibrating membrane device III 49, and a temporary storage tank V 410. Wastewater III is pumped from the outlet at the bottom of the ultrasonic treatment tank 33 to the temporary storage tank II 41 of the fourth-stage treatment module 4 via water pump III 34. The outlet of the temporary storage tank II 41 is connected to the inlet of the vibrating membrane device I 43. Water pump IV 42 pumps the wastewater III in the temporary storage tank II 41 to the membrane of the vibrating membrane device I 43. The outlet of the permeate from the vibrating membrane device I 43 is connected to the inlet of the temporary storage tank III 44. The return pipe of the vibrating membrane device I 43 re-enters the temporary storage tank II 41. The outlet of the temporary storage tank III 44 is connected to the inlet of the vibrating membrane device II 46. Water pump V 45 pumps the wastewater III from the temporary storage tank II 41 to the membrane of the vibrating membrane device II 46. Wastewater from storage tank Ⅲ44 is pumped to the membrane package of vibrating membrane device Ⅱ46. The outlet of the permeate from vibrating membrane device Ⅱ46 is connected to the inlet of temporary storage tank Ⅳ47. The return pipe of vibrating membrane device Ⅱ46 re-enters temporary storage tank Ⅲ44. The outlet of temporary storage tank Ⅳ47 is connected to the inlet of vibrating membrane device Ⅲ49. Wastewater from temporary storage tank Ⅳ47 is pumped to the membrane package of vibrating membrane device Ⅲ49 by water pump Ⅵ48. The outlet of the permeate from vibrating membrane device Ⅲ49 is connected to the inlet of temporary storage tank Ⅴ410. The return pipe of vibrating membrane device Ⅲ49 re-enters temporary storage tank Ⅴ410.

[0105] The membrane package installed in the vibrating membrane device I 43 is an ultrafiltration membrane package. Wastewater III is treated by the vibrating membrane device I 43. The wastewater that passes through the membrane package is the permeate I, and the wastewater that does not pass through the membrane package and flows back to the temporary storage tank II 41 is the concentrate I.

[0106] The membrane pack installed in the vibrating membrane device II 46 is a nanofiltration membrane pack. Permeate I is treated by the vibrating membrane device II 46, the wastewater that passes through the membrane pack is permeate II, and the wastewater that does not pass through the membrane pack and flows back to the temporary storage tank III 44 is concentrate II.

[0107] The membrane pack installed in the vibrating membrane unit Ⅲ49 is a reverse osmosis membrane pack. Permeate II is treated by the vibrating membrane unit Ⅲ49. The wastewater that passes through the membrane pack is permeate III, and the wastewater that does not pass through the membrane pack and flows back to the temporary storage tank Ⅳ47 is concentrate III.

[0108] Concentrates I, II, and III are collected and mixed to obtain a concentrated solution. This concentrated solution contains high levels of protein, lactose, vitamins, and minerals, and after drying, it can be used as a high-quality feed or food ingredient. Permeate III meets emission standards and can be used as water for cleaning equipment or discharged directly.

[0109] Cream wastewater contains substances such as oils, proteins, milk fat globule membranes, lactose, and somatic cells. The treatment method combines primary treatment module 1, secondary treatment module 3, and quaternary treatment module 4 to treat the cream wastewater. Through filtration (primary treatment), micro-nano bubble technology (secondary treatment), high-power ultrasonic treatment (tertiary treatment), and multi-stage vibrating membrane filtration (quaternary treatment), the organic matter in the cream wastewater is fully recovered and utilized, achieving the goal of turning waste into treasure.

[0110] like Figure 4 As shown, the processing flow includes:

[0111] I. Primary Treatment: The cream wastewater is filtered in primary treatment module 1 to obtain wastewater I and filter residue. The primary treatment module is a filtration device composed of screens with different mesh sizes. Suspended solids and precipitates in the cream wastewater are intercepted on the surface of the screens as filter residue. In other words, the cream wastewater undergoes solid-liquid separation through the screens to obtain wastewater I and filter residue. The suspended solids and precipitates in the cream wastewater are removed by sieving.

[0112] Secondary Treatment: Wastewater I is combined with micro-nano bubbles in secondary treatment module 2 to obtain Wastewater II and foam. The secondary treatment module is a micro-nano bubble device. Denatured whey protein, some casein micelles, fat globules, and fat globule membrane substances in Wastewater I are separated as foam. Lactose, minerals, vitamins, some whey protein, and a small amount of fat in Wastewater I are retained in Wastewater II. Suspended solids and organic pollutants in the cream wastewater are further reduced. In other words, Wastewater I is treated by the micro-nano bubble device to obtain Wastewater II and foam. The denatured whey protein, some casein micelles, fat globules, and fat globule membrane substances in Wastewater I are removed by being encapsulated in the foam.

[0113] III. Tertiary Treatment: Wastewater II undergoes ultrasonic treatment in tertiary treatment module 3 to obtain wastewater III. The tertiary treatment module is a power ultrasonic device. The particle size of the substances in wastewater III decreases, the solubility and stability increase, and the viscosity decreases. That is, after wastewater II is treated with power ultrasonication, wastewater III is obtained. The substances in wastewater III have smaller particle sizes, increased solubility and stability, and lower viscosity compared to the substances in wastewater II.

[0114] Specifically, a temperature-sensitive microgel with a lower critical dissolution temperature is added to wastewater II and stirred until homogeneous, forming a dispersed phase in the aqueous phase. This dispersed phase can act as a steric stabilizer during subsequent interface formation. Pulsed ultrasound is performed in ultrasonic treatment tank 33 in the order of action two → action one: action two (second power pulse, i.e., high power pulse) provides strong cavitation, and the cavitation microjets and shears break down and deagglomerate fat droplets, protein aggregates, and microgel clusters, causing the median particle size of the system to continuously decrease. When the particle size drops to the target threshold or the rate of decrease approaches zero, it indicates that the large breakable particles / agglomerates have been basically broken down, resulting in a finely dispersed composite system.

[0115] After the particle size has been significantly reduced, Action 1 (the first power pulse, i.e., the low-power pulse) is executed. Its intensity is low and it is biased towards mixing and interfacial rearrangement, which promotes the adsorption and rearrangement of temperature-sensitive microgels and whey proteins on the newly formed fat / protein interface, forming a continuous steric stabilizing layer, thereby inhibiting re-agglomeration and improving dispersion stability and apparent solubility. The termination condition is not only based on particle size, but also on the decrease in shear apparent viscosity as the main indicator, while requiring particle size, turbidity, and Zeta potential to be within the target range: when the viscosity decreases to the threshold and the above stability indicators do not deteriorate, it indicates that the three factors of crushing, rearrangement, and stabilization have reached a balance, and the system changes from coarse dispersion and easy agglomeration to low particle size and high stability, thus obtaining wastewater III with smaller particle size, stronger stability / solubility, and lower viscosity; if it is not satisfied, the correction cycle of Action 2 to strengthen crushing and Action 1 to compensate for rearrangement continues to approach the target.

[0116] Self-learning update algorithm: To ensure stable compliance across different batches under raw material fluctuations and temperature rise constraints, the cumulative time of Action 2, the cumulative time of Action 1, and whether the standard is met / temperature upper limit is reached are recorded as tagged control experience. This is then used to update the initial duration setting for the next batch using self-learning. When the standard is met, the time taken for this batch is used as an observation, and the setting for the next batch is updated using an exponentially weighted moving average, gradually converging the duration to a usable economic point. When the standard is not met, the time taken for this batch is considered the lower bound, and a conservative increment is applied to Action 2, prioritizing an increase in crushing intensity. Action 1 is maintained or only slightly adjusted to avoid excessive pursuit of interface rearrangement before the particle size issue is resolved. If the temperature upper limit is reached, Action 2 is reduced to decrease cavitation heat load, and a portion of the duration is proportionally transferred to Action 1. Boundary checks are performed between the minimum pulse duration and the maximum continuous running duration. Through an adaptive strategy driven by effectiveness and corrected by safety constraints, ultrasonic processing automatically iterates to a more stable and time-efficient processing cycle while ensuring temperature safety.

[0117] Among them, the first is set The cumulative duration observed in the batch under the compliant conditions was , , No. The old initial settings used for the next batch at the end of the batch are , The formula for updating the exponentially weighted moving average is:

[0118] ;

[0119] ;

[0120] In the formula, , The updated results are used for the first The new initial duration setting for the batch; For different weighting coefficients, perform iterative exponentially weighted moving average updates in batches:

[0121] Initialization: Given initial settings: This can be set using small-scale testing / initial experience / conservative values. For example, Take a conservatively achievable duration. Take the minimum available time to complete the interface rearrangement or give it based on experience.

[0122] Running the Batch: Starts with initial settings, goes through several cycles of Action 2 → Action 1 correction, and finally, if the target is met, the cumulative time observation is obtained. .

[0123] Update if criteria are met: Update using an exponentially weighted moving average. Combined into the next batch, obtained If the target is not met / temperature is exceeded, the exponentially weighted moving average update will not be used; instead, conservative incremental updates, load reduction and boundary checks will be employed. The process will then be iterated over.

[0124] Action 2 is more affected by raw material fluctuations, so a slightly larger value should be used for faster tracking; Action 1 is more focused on stability tuning, so a slightly smaller value can be used for smoother adjustments. ; .

[0125] This invention decouples strong cavitation fragmentation (Action 2) from gentle interface rearrangement stabilization (Action 1) and executes them in a closed loop in the order of fragmentation followed by stabilization. Under the constraint of the upper temperature limit, it takes into account both particle size reduction and interface restabilization, avoiding overheating, re-agglomeration, or irreversible degradation of protein structure caused by strong ultrasound alone. Using multiple indicators such as particle size, viscosity, turbidity, and Zeta potential as termination criteria, it can improve the processing target from seemingly finer to a truly usable state that is easier to disperse, less prone to re-agglomeration, and lower viscosity. Batch-level self-learning uses compliance / non-compliance + temperature-touch tags to update the ultrasound duration of the next batch, making the system adaptive to fluctuations in raw material concentration, oil ratio, and protein aggregation degree, gradually reducing over-processing, improving compliance rate and energy / time efficiency, and enhancing long-term consistency and traceability.

[0126] IV. Qualitative Treatment: Wastewater III undergoes multi-stage vibrating membrane filtration in the quadrature treatment module 4, ultimately yielding concentrated liquid and permeate III. Permeate III is clean water that has had pollutants removed from wastewater III and meets discharge standards, while the concentrated liquid is a liquid with most of the water removed but a higher nutrient content. In other words, wastewater III is treated by a multi-stage vibrating membrane filtration system to ultimately obtain permeate that meets discharge standards and concentrated liquid containing high nutrients that can be recycled.

[0127] The screen is composed of multiple screens with different mesh sizes; the filter residue after screening can be dried and used as feed; the foam generated after treatment by the micro-nano bubble device can be dried and used as feed; wastewater III is treated by vibrating membrane ultrafiltration to obtain concentrate I and permeate I; permeate I is treated by vibrating membrane nanofiltration to obtain concentrate II and permeate II; permeate II is treated by vibrating membrane reverse osmosis to obtain concentrate III and permeate III; concentrate I, concentrate II, and concentrate III are collected and mixed to obtain concentrate; the concentrate contains high levels of protein, lactose, vitamins, and minerals, and can be used as a high-quality feed and food ingredient after drying; permeate III meets the discharge standards and can be used as water for cleaning equipment or discharged directly.

[0128] Example 1

[0129] The influent water quality indicators of the cream wastewater are shown in Table 1 below:

[0130] Table 1. Water quality indicators of influent to cream wastewater

[0131] The method of the present invention was used to treat cream wastewater. The experimental data of each treatment module are shown in Table 2.

[0132] Table 2 Experimental data for each processing module

[0133] After multi-stage treatment, the permeate (III) fully meets the integrated wastewater discharge standards, such as the Class I discharge standard in GB8978-1996.

[0134] This invention provides a method and system for treating cream processing wastewater. The system employs a primary treatment module 1 to remove some suspended solids and sediments from the wastewater. A secondary treatment module 2 (using micro-nano bubble technology) removes some whey protein, casein micelles, fat globules, and fat globule membranes encapsulated in foam. A tertiary treatment module 3 (using power ultrasonic technology) reduces particle size, enhances solubility and stability, and lowers viscosity. A quaternary treatment module 4 separates nutrients from the wastewater. Through these primary, secondary, and tertiary treatments, some organic matter is removed, and the viscosity of the wastewater is reduced, significantly lowering the processing load and difficulty of the quaternary treatment stage. Valuable nutrients are recovered. This multi-stage treatment method significantly reduces the COD, suspended solids, and ammonia nitrogen levels in cream processing wastewater, enabling resource recovery and utilization. It offers advantages such as stable operation, low energy consumption, and excellent water treatment results.

[0135] This invention provides a computer device, which may be a server, and its internal structure diagram may be as follows: Figure 5 As shown, the computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The database stores static and dynamic information data. The network interface communicates with external terminals via a network connection. When the computer program is executed by the processor, it implements the steps in the above method embodiments.

[0136] Those skilled in the art will understand that Figure 5 The structure shown is merely a block diagram of a portion of the structure related to the present invention and does not constitute a limitation on the computer device to which the present invention is applied. A specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0137] In addition, the present invention also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments.

[0138] In addition, the present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps in the above method embodiments.

[0139] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided by this invention can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0140] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for treating butter wastewater, characterized in that, include: S1. Use a sieve to remove sediment and suspended solids from the cream wastewater to obtain wastewater I; S2. Wastewater I is combined with micro-nano bubbles through a dissolved air pump, a gas-liquid separation tank and a micro-nano bubble nozzle, and the bubbles float to the surface in the water treatment tank to form foam. After removing the foam, wastewater II is obtained. S3. Combine the temperature-sensitive microgel with wastewater II to obtain a wastewater material composite system. Perform ultrasonic treatment on the composite system with multiple actions and self-learning update time through an ultrasonic treatment tank. After reaching the termination condition, wastewater III with reduced particle size, enhanced solubility and stability, and decreased viscosity is obtained. S4. Wastewater III is subjected to multi-stage filtration to finally obtain concentrated liquid and permeate III that meets the discharge standards; S5. The concentrate is dried and then recycled.

2. The method for treating butter wastewater according to claim 1, characterized in that, The process involves using a dissolved air pump, a gas-liquid separation tank, and micro / nano bubble nozzles to combine wastewater I with micro / nano bubbles, which then float to the surface in the water treatment tank to form foam. After removing the foam, wastewater II is obtained, comprising: Wastewater I enters the water treatment tank and the dissolved air pump is started to draw wastewater I into the dissolved air pump. After mixing with the wastewater I by drawing in air, it enters the gas-liquid separation tank and is discharged into the water treatment tank through micro-nano bubble nozzles. The substances in wastewater I combine with micro-nano bubbles and float to the surface to form foam. The foam is scraped off by a foam scraping device and collected in a foam collection tank. After the foam is scraped off, wastewater II is obtained.

3. The method for treating butter wastewater according to claim 1, characterized in that, The process of combining temperature-sensitive microgels with wastewater II to obtain a wastewater material composite system involves subjecting the composite system to multi-action ultrasonic treatment with a self-learning update time in an ultrasonic treatment tank. Upon reaching the termination condition, wastewater III with reduced particle size, enhanced solubility and stability, and decreased viscosity is obtained, comprising: Wastewater II is introduced into an ultrasonic treatment tank, and a thermosensitive microgel with a lower critical dissolution temperature is stirred evenly with wastewater II, so that the thermosensitive microgel forms a dispersed phase in the aqueous phase that can provide steric stability, and a wastewater material composite system is obtained. The ultrasonic treatment tank is equipped with Action 1 and Action 2. Action 1 is a first-power pulse ultrasound, used to mix and rearrange the interface of the wastewater material composite system. Action 2 is a second-power pulse ultrasound, used to cavitation breakup and depolymerization of the wastewater material composite system. At the same time, an upper temperature limit constraint is configured. The wastewater material composite system is subjected to the second power pulse ultrasound action. Under the condition that the temperature does not exceed the upper limit of the temperature, the fat droplets and protein aggregates are broken by cavitation micro-jet and the temperature-sensitive microgel clusters are depolymerized until the median particle size of the volume distribution of the wastewater material composite system decreases to the target threshold, and a finely dispersed composite system with a reduced median particle size of the volume distribution is obtained. The action of performing first-power pulsed ultrasound on the finely dispersed composite system causes the thermosensitive microgel and whey protein to complete adsorption and rearrangement at the new interface and establish a sterically hindered stable layer, resulting in a low-particle-size composite system with enhanced stability and apparent solubility. The shear apparent viscosity of the low particle size composite system is measured. When the shear apparent viscosity decreases to the threshold and the particle size, turbidity, and Zeta potential are all kept within the target range, the ultrasonic treatment is terminated. Otherwise, the correction cycle is performed in the order of action two plus action one. Finally, wastewater III with reduced particle size, enhanced solubility and stability, and decreased viscosity is obtained. The system records the cumulative time of Action 2, the cumulative time of Action 1, the validity label, and the safety constraint label for each batch, and uses a self-learning update algorithm to update the initial duration of Action 2 and the initial duration of Action 1 for the next batch.

4. The method for treating butter wastewater according to claim 3, characterized in that, The process of recording the cumulative time of Action 2, the cumulative time of Action 1, the validity label, and the safety constraint label for each batch, and updating the initial duration of Action 2 and the initial duration of Action 1 for the next batch using a self-learning update algorithm, includes: Record the cumulative time of Action 2 and the cumulative time of Action 1 for the current batch, as well as the current batch's compliance flag and whether the current batch's temperature has reached the upper limit flag; Use the standard-compliance mark as an validity label, and the temperature limit mark as a safety constraint label; When the validity label is met, the cumulative time of action 2 and the cumulative time of action 1 are used as the observation values ​​for the required time of action 2 and action 1 in the next batch; when the validity label is not met, the cumulative time of action 2 and the cumulative time of action 1 are used as the lower bound reference value for the required time of action 2 in the next batch and the infeasible reference value for the required time of action 1. When the target is met, the initial duration setting value of the next batch of action 2 and the initial duration setting value of the next batch of action 1 are updated by exponential weighted moving average to obtain the initial duration of action 2 and the initial duration of action 1 of the next batch after self-learning update. If the target is not met, a preset conservative increment is applied to the initial duration setting value of the next batch of action 2, while the initial duration setting value of the next batch of action 1 remains unchanged, resulting in the initial duration of action 2 and the initial duration of action 1 of the next batch after being updated according to the conservative rule for not meeting the target. Based on safety constraints and boundary conditions, the initial duration of Action 2 in the next batch is modified and checked against the initial duration of Action 1 to obtain the executable initial duration of Action 2 in the next batch and the initial duration of Action 1.

5. The method for treating butter wastewater according to claim 4, characterized in that, The process of correcting and checking the initial duration of Action 2 and Action 1 in the next batch based on safety constraints and boundary conditions includes: When the temperature reaches the upper limit mark, the initial duration of the second action in the next batch is reduced to decrease the cavitation heat load, and the reduction correction amount is transferred to the initial duration of the first action in the next batch according to a preset ratio, so as to obtain the initial duration of the second action and the initial duration of the first action in the next batch that meet the upper limit temperature constraint. The initial duration of Action 2 for the next batch that meets the upper temperature limit constraint is checked against the initial duration of Action 1 to ensure that the minimum pulse duration and maximum continuous operation duration allowed by the ultrasonic treatment tank are met.

6. The method for treating butter wastewater according to claim 4, characterized in that, The step of updating the initial duration setting value for the next batch of actions (action 2) and the initial duration setting value for the next batch of actions (action 1) by performing an exponentially weighted moving average upon achieving the target includes: Read the cumulative time of Action 2 and the cumulative time of Action 1 in this batch, as well as the old initial setting value used for the next batch; Configure weighting coefficients, combine the cumulative time of action 2, the cumulative time of action 1, and the old initial setting value used for the next batch, and calculate the initial duration of action 2 and the initial duration of action 1 for the next batch.

7. A system for treating butter wastewater, used to implement the method for treating butter wastewater according to any one of claims 1-6, characterized in that, include: The primary treatment module is used to remove sediment and suspended solids from the cream wastewater using a screen, resulting in Wastewater I; The secondary treatment module is used to combine wastewater I with micro-nano bubbles and form foam by floating in the water treatment tank. After removing the foam, wastewater II is obtained. The three-stage treatment module is used to combine the temperature-sensitive microgel with wastewater II to obtain a wastewater material composite system. The composite system is subjected to ultrasonic treatment with multiple actions and self-learning update time through an ultrasonic treatment tank. After reaching the termination condition, wastewater III with reduced particle size, enhanced solubility and stability, and decreased viscosity is obtained. The four-stage treatment module is used to perform multi-stage filtration on wastewater III, and finally obtain concentrated liquid and permeate III that meets the discharge standards. The recovery module is used to dry and recycle the concentrate.

8. A system for treating butter wastewater according to claim 7, characterized in that, The secondary processing module includes a water treatment tank, a dissolved air pump and a gas-liquid separator are installed at the bottom of the water treatment tank, a micro-nano bubble nozzle is installed above the gas-liquid separator, and a foam scraping device is installed above the micro-nano bubble nozzle. A foam collection tank is connected to one side of the water treatment tank, and a water pump II is installed between the water treatment tank and the tertiary treatment module.

9. A system for treating butter wastewater according to claim 7, characterized in that, The third-level processing module includes an ultrasonic processing tank, which is equipped with a power ultrasonic device and a stirrer. A water pump III is installed between the ultrasonic processing tank and the fourth-level processing module.

10. A system for treating butter wastewater according to claim 7, characterized in that, The four-stage processing module includes vibrating membrane device I, vibrating membrane device II, and vibrating membrane device III. The membrane pack of vibrating membrane device I is an ultrafiltration membrane pack, the membrane pack of vibrating membrane device II is a nanofiltration membrane pack, and the membrane pack of vibrating membrane device III is a reverse osmosis membrane pack.

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