Wastewater treatment system, method, storage medium and program

Abstract

The present disclosure provides a wastewater treatment system, method, storage medium and program, wherein the wastewater treatment system comprises: a coagulation device, the coagulation device comprises: a coagulation tank, the first end of the coagulation tank is connected with a plant end; a coagulation pipe, the second end of the coagulation tank is connected with the coagulation pipe; a coagulation valve, the coagulation valve is arranged in the coagulation pipe; a deposition device, the first end of the deposition device is connected with the third end of the coagulation tank; a deposition monitoring element, the deposition monitoring element is located in the deposition device and is adapted to monitor the suspended particle concentration of the wastewater in the deposition device; a processor, the processor is coupled with the deposition monitoring element and the coagulation valve, and is adapted to control the coagulation valve to adjust the amount of coagulant provided by the coagulation pipe according to the monitoring signal of the deposition monitoring element; wherein the plant end is adapted to provide wastewater, and the wastewater comprises chemical mechanical polishing wastewater. By using the above technical scheme, the treatment efficiency of the wastewater can be improved.

Description

Technical Field

[0001] This disclosure relates to the field of semiconductor manufacturing technology, and in particular to a wastewater treatment system, method, storage medium, and procedure. Background Technology

[0002] Grinding wastewater is one of the wastewaters generated in the semiconductor manufacturing process. Grinding wastewater has a complex composition, and the particle size of the grinding particles in the wastewater is on the nanometer scale, and the concentration of grinding particles is not high, which makes the treatment of grinding wastewater quite difficult.

[0003] How to treat grinding wastewater is a question worth discussing. Summary of the Invention

[0004] In view of this, the present disclosure provides a wastewater treatment system, method, storage medium, and program that can improve wastewater treatment efficiency.

[0005] To address the aforementioned technical problems, this disclosure provides a wastewater treatment system. The wastewater treatment system includes:

[0006] The coagulation device includes:

[0007] A coagulation tank, the first end of which is connected to the plant maintenance end;

[0008] A coagulation pipe, which is connected to the second end of the coagulation tank;

[0009] A coagulation valve is disposed on the coagulation pipe;

[0010] A sedimentation device, wherein a first end of the sedimentation device is connected to a third end of the coagulation tank;

[0011] A sedimentation monitoring device, located within the sedimentation apparatus, is adapted to monitor the concentration of suspended particles in the wastewater within the sedimentation apparatus;

[0012] A processor, coupled to the deposition monitoring device and the coagulation valve, is adapted to control the coagulation valve to adjust the amount of coagulant supplied by the coagulation pipe according to the monitoring signal of the deposition monitoring device;

[0013] The plant terminal is suitable for providing wastewater, including chemical mechanical grinding wastewater.

[0014] Optionally, the wastewater treatment system further includes:

[0015] Flocculation device, the flocculation device comprising:

[0016] A flocculation tank, the first end of which is connected to the third end of the coagulation tank; the third end of the flocculation tank is connected to the first end of the sedimentation device.

[0017] A flocculation pipe is connected to the second end of the flocculation tank and is used to supply flocculant into the flocculation tank;

[0018] A flocculation valve is provided on the flocculation pipe to adjust the amount of flocculant supplied by the flocculation pipe;

[0019] The processor is coupled to the flocculation valve and is adapted to control the flocculation valve to adjust the amount of flocculant supplied by the flocculation pipe according to the monitoring signal of the deposition monitoring device.

[0020] Optionally, the wastewater treatment system further includes:

[0021] A coagulation agitator is fixedly disposed in the coagulation tank, and the main body of the coagulation agitator is located inside the coagulation tank to agitate the wastewater in the coagulation tank.

[0022] And / or, a flocculation agitator, the flocculation agitator being fixed to the flocculation tank, with the main body of the flocculation agitator located inside the flocculation tank, to agitate the wastewater inside the flocculation tank.

[0023] Optionally, the wastewater treatment system further includes:

[0024] A pH main regulating device, adapted to adjust the pH of wastewater supplied by the plant; wherein, the pH main regulating device includes:

[0025] A pH main regulating tank, the first end of which is connected to the plant end, and the third end of which is connected to the first end of the coagulation tank;

[0026] A pH main regulating pipe is connected to the second end of the pH main regulating tank and is adapted to provide pH main regulating agent into the pH main regulating tank.

[0027] A pH main regulating valve is disposed on the pH main regulating pipe;

[0028] A pH main monitoring device is located inside the pH main regulating tank and is suitable for monitoring the pH value of wastewater in the pH main regulating tank.

[0029] Optionally, the wastewater treatment system further includes:

[0030] A pH adjustment device, adapted to perform secondary pH adjustment on the wastewater supplied by the main pH adjustment device; wherein, the pH adjustment device includes:

[0031] The pH adjustment tank has a first end connected to the third end of the main pH adjustment tank, and the third end of the pH adjustment tank is connected to the first end of the coagulation tank.

[0032] A pH regulating tube is connected to the second end of the pH regulating tank and is adapted to provide a pH regulating agent into the pH regulating tank.

[0033] A pH regulating valve is provided on the pH regulating pipe;

[0034] A pH monitoring device is located inside the pH adjustment tank and is suitable for monitoring the pH value of the wastewater in the pH adjustment tank.

[0035] Optionally, the processor is coupled to the main pH monitoring device and the main pH regulating valve, and is adapted to control the main pH regulating valve to adjust the amount of pH regulating agent provided by the main pH regulating tube according to the monitoring signal of the main pH monitoring device;

[0036] And / or, the processor is coupled to the pH monitoring device and the pH regulating valve, and is adapted to control the pH regulating valve to adjust the amount of pH regulator supplied by the pH regulating tube according to the monitoring signal of the pH monitoring device.

[0037] Optionally, the wastewater treatment system further includes:

[0038] A pH main agitator is fixedly disposed in the pH main regulating tank, and the main body of the pH main agitator is located inside the pH main regulating tank to agitate the wastewater in the pH main regulating tank.

[0039] And / or, pH from a stirring element, the pH from a stirring element being fixed to the pH from a regulating tank, and the main body of the pH from a stirring element being located inside the pH from a regulating tank, so as to stir the wastewater in the pH from a regulating tank.

[0040] Optionally, the wastewater treatment system further includes:

[0041] Neutralization device, wherein the neutralization device is adapted to adjust the pH of the supernatant after the wastewater has been separated into layers; wherein the neutralization device comprises:

[0042] A neutralization tank, the first end of which is connected to the third end of the deposition apparatus;

[0043] A neutralization tube, connected to a second end of the neutralization tank, is adapted to provide a neutralizing agent into the neutralization tank;

[0044] A neutralization valve is disposed on the neutralization pipe;

[0045] A neutralization monitoring device, located inside the neutralization tank, is suitable for monitoring the pH value of the wastewater in the neutralization tank;

[0046] The processor is coupled to the neutralization monitoring device and the neutralization valve, and is adapted to control the neutralization valve to adjust the amount of neutralizing agent supplied by the neutralization tube according to the monitoring signal of the neutralization monitoring device.

[0047] Optionally, the wastewater treatment system further includes:

[0048] A clarification device, wherein the first end of the clarification device is connected to the third end of the sedimentation device, and the third end of the clarification device is connected to the first end of the neutralization tank, is adapted to receive the upper clear liquid after the wastewater has been separated into layers, for secondary sedimentation of the clear liquid.

[0049] Optionally, the wastewater treatment system further includes:

[0050] A compression device, connected to the second end of the sedimentation device, is adapted to receive the lower sediment layer after the wastewater has been stratified, in order to compress the sediment.

[0051] This disclosure also provides a wastewater treatment method. The wastewater treatment method is applied to a wastewater treatment system, which includes a coagulation device and a sedimentation monitoring device. The coagulation device includes a coagulation tank, a coagulation pipe, and a coagulation valve.

[0052] The method includes:

[0053] The monitoring signal emitted by the sedimentation monitoring device is acquired, and the monitoring signal is used to characterize the suspended particulate concentration of the wastewater in the sedimentation device;

[0054] In response to the suspended particle concentration being greater than a first preset concentration, the amount of coagulant provided by the coagulation pipe is increased at a first adjustment rate until the suspended particle concentration is less than or equal to the first preset concentration.

[0055] In response to the suspended particle concentration being less than a first preset concentration, the amount of coagulant supplied by the coagulation pipe is reduced at a second adjustment rate until the suspended particle concentration rises to the first preset concentration;

[0056] The first adjustment rate is greater than the second adjustment rate.

[0057] Optionally, the first adjustment rate is greater than 10 times the second adjustment rate.

[0058] This disclosure also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program that, when executed, performs the steps of the wastewater treatment method described in any of the foregoing embodiments.

[0059] This disclosure also provides a computer program product. The computer program product includes computer instructions that, when executed by a processor, implement the steps of the wastewater treatment method described in any of the foregoing embodiments.

[0060] Compared with the prior art, the technical solution of the present disclosure has the following advantages:

[0061] In the wastewater treatment system provided in this embodiment, wastewater is supplied to the coagulation tank from the plant end, and coagulant is supplied to the coagulation tank through the coagulation pipe to coagulate suspended particles in the wastewater. The coagulated wastewater is then input into a sedimentation device. A coagulation monitoring device monitors the concentration of suspended particles in the wastewater within the sedimentation device and sends the monitoring signal to a processor. The monitoring signal characterizes the concentration of suspended particles in the wastewater within the sedimentation device. Based on the monitoring signal, the processor controls the coagulation valve to adjust the amount of coagulant supplied by the coagulation pipe. This means that the wastewater treatment system can automatically adjust the amount of coagulant supplied by the coagulation pipe according to the monitoring signal of the wastewater within the sedimentation device to match the wastewater supplied from the plant end. Therefore, it can improve the wastewater treatment efficiency while reducing the amount of coagulant used and saving wastewater treatment costs.

[0062] In the wastewater treatment method provided in this embodiment, when the suspended particle concentration of the wastewater in the sedimentation device is greater than a first preset concentration, the amount of coagulant provided by the coagulation pipe is increased by a first adjustment rate. This allows the current dose of coagulant provided by the coagulation pipe to quickly exceed the target dose of the coagulant. While reducing the adjustment time, the suspended particle concentration corresponding to the addition of wastewater exceeding the target dose of coagulant into the sedimentation device is less than the first preset concentration. This means that when wastewater exceeding the target dose of coagulant is added into the sedimentation device and mixed with the wastewater in the previous sedimentation device where the suspended particle concentration exceeded the first preset concentration, the suspended particle concentration of the wastewater in the previous sedimentation device can be reduced, thereby improving the wastewater treatment capacity of the wastewater treatment system. Since the sedimentation monitoring device directly monitors the wastewater in the sedimentation device, rather than the wastewater in the coagulation device, it takes a certain amount of time for the wastewater in the coagulation device to reach the sedimentation device. Therefore, the information represented by the monitoring signal of the sedimentation monitoring device is delayed. When the suspended particle concentration of the wastewater in the sedimentation device is less than the first preset concentration, the amount of coagulant provided by the coagulation pipe is reduced by the second adjustment rate. This can prolong the adjustment time, compensate for the delay in the information represented by the monitoring signal of the sedimentation monitoring device, and reduce the probability that the suspended particle concentration of the wastewater in the sedimentation device will exceed the first preset concentration during the adjustment process. Attached Figure Description

[0063] To more clearly illustrate the technical solutions of the embodiments of this specification, the drawings used in the description of the embodiments of this specification or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0064] Figure 1 This is a schematic diagram of the structure of a wastewater treatment system according to an embodiment of the present disclosure;

[0065] Figure 2 This is a flowchart of the steps of a wastewater treatment method according to an embodiment of the present disclosure.

[0066] Explanation of reference numerals in the attached figures:

[0067] 110 coagulation tank, 120 coagulation pipe, 130 coagulation valve, 140 coagulation mixing component;

[0068] Deposition device 200, deposition monitoring device 210;

[0069] 310 flocculation tank 310, flocculation pipe 320, flocculation valve 330, flocculation agitator 340;

[0070] pH main regulating tank 410, pH main regulating pipe 420, pH main regulating valve 430, pH main stirring component 440, pH main monitoring component 450;

[0071] pH is supplied from the regulating tank 510, pH from the regulating pipe 520, pH from the regulating valve 530, pH from the stirring element 540, and pH from the monitoring element 550.

[0072] Neutralization tank 610, neutralization pipe 620, neutralization valve 630, neutralization stirring component 640, neutralization monitoring component 650;

[0073] Clarification device 700;

[0074] Compression device 800. Detailed Implementation

[0075] As can be seen from the background technology, the grinding wastewater is difficult to treat because the particle size of the grinding particles in the wastewater is on the nanometer scale and the concentration of grinding particles is not high. Therefore, how to treat grinding wastewater is a problem worth discussing.

[0076] In a specific wastewater treatment scenario, the grinding wastewater discharged from the plant undergoes coagulation and sedimentation to form an upper clear liquid and a lower sediment. The upper clear liquid enters the industrial drainage pipeline, while the sediment is discharged into a sediment concentration tank.

[0077] However, the wastewater from the plant is not discharged on a fixed schedule and in a fixed quantity. The dosage of coagulant during the coagulation process is not easy to control. If too much coagulant is added, the treatment cost will increase. If too little coagulant is added, the coagulation treatment will be incomplete, and the concentration of grinding particles in the supernatant formed after sedimentation will exceed the standard.

[0078] To address the aforementioned technical issues, in this embodiment, the plant provides wastewater to the coagulation tank, and the coagulation pipe provides coagulant to the coagulation tank to coagulate suspended particles in the wastewater. The coagulated wastewater is then input into a sedimentation device. A coagulation monitoring device monitors the suspended particles in the wastewater within the sedimentation device and sends the monitoring signal to a processor. The monitoring signal characterizes the concentration of suspended particles in the wastewater within the sedimentation device. Based on the monitoring signal, the processor controls the coagulation valve to adjust the amount of coagulant provided by the coagulation pipe. This means that the wastewater treatment system can automatically adjust the amount of coagulant provided by the coagulation pipe according to the monitoring signal of the wastewater within the sedimentation device to match the wastewater provided by the plant, thereby improving wastewater treatment efficiency and reducing the amount of coagulant used, thus saving wastewater treatment costs.

[0079] To make the above-mentioned objectives, features and beneficial effects of this disclosure more apparent and understandable, specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings.

[0080] Reference Figure 1 , Figure 1 A schematic diagram of a wastewater treatment system according to an embodiment of this disclosure is shown. The wastewater treatment system may include a coagulation device and a sedimentation device 200.

[0081] Specifically, the first end of the coagulation device is connected to the plant end, which is used to supply wastewater to the coagulation device; the second end of the coagulation device is connected to the coagulant supply end, which is used to supply coagulant to the coagulation device; and the third end of the coagulation device is connected to the first end of the sedimentation device 200.

[0082] Specifically, the plant terminal is used to supply wastewater to the coagulation device, and the coagulant supply terminal supplies coagulant to the coagulation device. The wastewater in the coagulation device undergoes coagulation, and the coagulated wastewater enters the sedimentation device 200. After sedimentation in the sedimentation device 200 for a preset time, it separates into layers, forming an upper clear liquid and a lower sediment.

[0083] It should be noted that the preset time can be determined based on the concentration and type of suspended particles in the wastewater and the discharge standards of industrial drainage pipelines.

[0084] It should be noted that the "plant end" refers to the semiconductor processing equipment upstream of the wastewater treatment system, such as grinding machines and etching machines; the "wastewater" refers to the wastewater generated during the production process of the semiconductor processing equipment, such as chemical mechanical grinding wastewater and activated carbon backwashing wastewater.

[0085] In some embodiments, the coagulant may be one of polyaluminum chloride (PAC), potassium aluminum sulfate (PAS), etc.

[0086] In some embodiments, the coagulation device may include a coagulation tank 110, a coagulation pipe 120, and a coagulation valve 130.

[0087] Specifically, the first end of the coagulation tank 110 is connected to the plant end, the third end of the coagulation tank 110 is connected to the sedimentation device 200, one end of the coagulation pipe 120 is connected to the second end of the coagulation tank 110, and the other end is connected to the coagulant supply end; the coagulation valve 130 is provided on the coagulation pipe 120 and is used to adjust the amount of coagulant supplied by the coagulation pipe 120 to the coagulation tank 110.

[0088] It should be noted that the first end of the coagulation device is the first end of the coagulation tank 110, the second end of the coagulation device is the end of the coagulation pipe 120 connected to the coagulant supply end, and the third end of the coagulation device is the third end of the coagulation tank 110.

[0089] In some embodiments, the coagulation valve 130 may be an electrically controlled valve or a manually controlled valve.

[0090] In some embodiments, the wastewater treatment system may further include a sedimentation monitoring element 210, which is disposed on the sedimentation device 200 and the probe of the sedimentation monitoring element 210 is located inside the sedimentation device 200.

[0091] In actual use, the probe of the sedimentation monitoring device 210 is located in the wastewater of the coagulation tank 110, thereby monitoring the concentration of suspended particles in the wastewater of the sedimentation device 200.

[0092] In some embodiments, the deposition monitoring device 210 may be a suspended solids (SS) meter.

[0093] In some embodiments, the coagulation valve 130 is an electrically controlled valve, and the wastewater treatment system may further include a processor (not shown) coupled to the sedimentation monitoring device 210 and the coagulation valve 130 to control the coagulation valve 130 to adjust the amount of coagulant provided by the coagulation pipe 120 according to the monitoring signal of the sedimentation monitoring device 210, wherein the monitoring signal characterizes the concentration of suspended particles in the wastewater within the sedimentation device 200.

[0094] In one specific application scenario, the sedimentation monitoring device 210 sends the suspended particle concentration of the wastewater in the sedimentation device 200 to the processor. The processor processes the monitoring signal from the sedimentation monitoring device 210: when the processor determines that the monitoring signal from the sedimentation monitoring device 210 is within a preset suspended particle concentration range, it controls the coagulation valve 130 not to adjust the amount of coagulant provided by the coagulation pipe 120; when the processor determines that the monitoring signal from the sedimentation monitoring device 210 is lower than the preset suspended particle concentration range, it controls the coagulation valve 130 to reduce the amount of coagulant provided by the coagulation pipe 120, so that the suspended particle concentration of the wastewater subsequently input into the sedimentation device 200 is within the preset suspended particle concentration range, while also saving costs; when the processor determines that the monitoring signal from the sedimentation monitoring device 210 is greater than the preset suspended particle concentration range, it controls the coagulation valve 130 to increase the amount of coagulant provided by the coagulation pipe 120, so that the suspended particle concentration of the wastewater subsequently input into the sedimentation device 200 is within the preset suspended particle concentration range.

[0095] In summary, the wastewater treatment system can automatically adjust the amount of coagulant provided by the coagulation pipe 120 according to the monitoring signal of the wastewater in the sedimentation device 200 to match the wastewater provided by the plant, thereby improving the wastewater treatment efficiency and reducing the amount of coagulant used, thus saving wastewater treatment costs.

[0096] In some embodiments, the wastewater treatment system may further include a coagulation agitator 140, which is fixed to the coagulation tank 110 and the main body of the coagulation agitator 140 is located inside the coagulation tank 110 to agitate the wastewater inside the coagulation tank 110. This allows the coagulant to be fully mixed with the wastewater, thereby improving the efficiency of the coagulant.

[0097] In some embodiments, the wastewater treatment system may further include a flocculation device.

[0098] Specifically, the first end of the flocculation device is connected to the third end of the coagulation tank 110, the second end of the flocculation device is connected to the flocculant supply end, and the third end of the flocculation device is connected to the first end of the sedimentation device 200.

[0099] Specifically, the coagulation device provides coagulated wastewater to the flocculation device, and the flocculant supply end provides flocculant to the flocculation device. The wastewater in the flocculation device undergoes flocculation, and the flocculated wastewater enters the sedimentation device 200. After sedimentation in the sedimentation device 200 for a preset time, it separates into layers, forming an upper clear liquid and a lower sediment.

[0100] It should be noted that flocculation refers to the phenomenon of multiple small clumps of flocculent material agglomerating with each other to form larger flocculent material. Compared with the coagulated material formed by coagulation, the coagulated material formed by further flocculation has a larger volume, which can increase the deposition rate of the coagulated material in the deposition device 200 and reduce the preset deposition time.

[0101] In some embodiments, the flocculant may be one of polyamide (PAA), anionic polyacrylamide polymer (PAM), etc.

[0102] In some embodiments, the flocculation device may include a flocculation tank 310, a flocculation pipe 320, and a flocculation valve 330.

[0103] Specifically, the first end of the flocculation tank 310 is connected to the third end of the coagulation tank 110, the third end of the flocculation tank 310 is connected to the sedimentation device 200, one end of the flocculation pipe 320 is connected to the second end of the flocculation tank 310, and the other end is connected to the flocculant supply end; the flocculation valve 330 is provided on the flocculation pipe 320 and is used to adjust the amount of flocculant supplied by the flocculation pipe 320 to the flocculation tank 310.

[0104] It should be noted that the first end of the flocculation device is the first end of the flocculation tank 310, the second end of the flocculation device is the end of the flocculation pipe 320 connected to the flocculant supply end, and the third end of the flocculation device is the third end of the flocculation tank 310.

[0105] In some embodiments, the flocculation valve 330 may be an electrically controlled valve or a manually controlled valve.

[0106] In some embodiments, the flocculation valve 330 is an electrically controlled valve, and the processor is coupled to the flocculation valve 330 to control the flocculation valve 330 to adjust the amount of flocculant provided by the flocculation pipe 320 according to the monitoring signal of the deposition monitoring device 210.

[0107] In a specific application scenario, the sedimentation monitoring device 210 sends the suspended particle concentration of the wastewater in the sedimentation device 200 to the processor. The processor processes the monitoring signal from the sedimentation monitoring device 210: when the processor determines that the monitoring signal from the sedimentation monitoring device 210 is within a preset suspended particle concentration range, it controls the flocculation valve 330 not to adjust the amount of flocculant provided by the flocculation pipe 320; when the processor determines that the monitoring signal from the sedimentation monitoring device 210 is lower than the preset suspended particle concentration range, it controls the flocculation valve 330 to reduce the amount of flocculant provided by the flocculation pipe 320, so that the suspended particle concentration of the wastewater subsequently input into the sedimentation device 200 is within the preset suspended particle concentration range, while also saving costs; when the processor determines that the monitoring signal from the sedimentation monitoring device 210 is greater than the preset suspended particle concentration range, it controls the flocculation valve 330 to increase the amount of flocculant provided by the flocculation pipe 320, so that the suspended particle concentration of the wastewater subsequently input into the sedimentation device 200 is within the preset suspended particle concentration range.

[0108] In summary, the wastewater treatment system can automatically adjust the amount of flocculant provided by the flocculation pipe 320 according to the monitoring signal of the wastewater in the sedimentation device 200 to match the wastewater provided by the plant, thus improving the wastewater treatment efficiency and reducing the amount of flocculant used, thereby saving wastewater treatment costs.

[0109] In some embodiments, the wastewater treatment system may further include a flocculation agitator 340, which is fixed to the flocculation tank 310 and the main body of the flocculation agitator 340 is located inside the flocculation tank 310 to agitate the wastewater inside the flocculation tank 310. This allows the flocculant to be fully mixed with the wastewater, thereby improving the efficiency of flocculant use.

[0110] In some embodiments, the wastewater treatment system may further include a pH main regulating device.

[0111] Specifically, the first end of the pH main regulating device is connected to the plant service end, which is used to supply wastewater to the pH main regulating device; the second end of the pH main regulating device is connected to the pH main regulating agent supply end, which is used to supply pH main regulating agent to the pH main regulating device; and the third end of the pH main regulating device is connected to the first end of the coagulation device.

[0112] Specifically, the plant terminal is used to supply wastewater to the pH main regulating device, and the pH main regulating agent supply terminal supplies pH main regulating agent to the pH main regulating device to adjust the pH value of the wastewater in the pH main regulating device. The wastewater with adjusted pH value enters the coagulation device for coagulation operation.

[0113] It should be noted that the pH main regulator can be an alkaline liquid such as sodium hydroxide (NaOH) or an acidic liquid such as sulfuric acid (H2SO4). The specific type of the pH main regulator can be determined according to the type of waste liquid, the type of coagulant, and the type of flocculant.

[0114] In one specific application example, the wastewater is crystal back grinding wastewater, the coagulant is PAC, the flocculant is PAM, and the main pH regulator is sodium hydroxide (NaOH) to adjust the pH value of the wastewater to 8 to 9.

[0115] Specifically, the pH value of the wastewater from crystal back grinding is between 2 and 4, and the optimal pH value range for PAC and PAM coagulation environment is between 8 and 9. NaOH, as an alkaline liquid, can improve the utilization efficiency of PAC and PAM and reduce costs by adjusting the pH of the wastewater to 8 to 9. The pH value is acidity or alkalinity.

[0116] In some embodiments, the pH main regulating device may include a pH main regulating tank 410, a pH main regulating pipe 420, and a pH main regulating valve 430.

[0117] Specifically, the first end of the pH main regulating tank 410 is connected to the plant end, the third end of the pH main regulating tank 410 is connected to the coagulation device, one end of the pH main regulating pipe 420 is connected to the second end of the pH main regulating tank 410, and the other end is connected to the pH main regulating agent supply end; the pH main regulating valve 430 is disposed on the pH main regulating pipe 420 and is used to adjust the amount of pH main regulating agent supplied by the pH main regulating pipe 420 to the pH main regulating tank 410.

[0118] It should be noted that the first end of the pH main regulating device is the first end of the pH main regulating tank 410, the second end of the pH main regulating device is the end of the pH main regulating pipe 420 connected to the pH main regulating agent supply end, and the third end of the pH main regulating device is the third end of the pH main regulating tank 410.

[0119] In some embodiments, the pH main regulating valve 430 can be an electrically controlled valve or a manually controlled valve.

[0120] In some embodiments, the wastewater treatment system may further include a pH main monitoring element 450, which is disposed on the pH main regulating tank 410, and the probe of the pH main monitoring element 450 is located inside the pH main regulating tank 410.

[0121] In actual use, the probe of the main pH monitoring component 450 is located in the wastewater of the main pH regulating tank 410, thereby enabling it to monitor the pH value of the wastewater in the main pH regulating tank 410.

[0122] In some embodiments, the pH main monitoring device 450 may be a pH meter.

[0123] In some embodiments, the pH main regulating valve 430 is an electrically controlled valve, and the processor is coupled to the pH main monitoring device 450 and the pH main regulating valve 430 to control the pH main regulating valve 430 to adjust the amount of pH main regulating agent provided by the pH main regulating tube 420 according to the monitoring signal of the pH main monitoring device 450.

[0124] In a specific application scenario, the pH main monitoring device 450 sends the pH value of the wastewater (e.g., crystal back grinding wastewater) in the pH main regulating tank 410 to the processor. The processor processes the monitoring signal from the pH main monitoring device 450: when the processor determines that the monitoring signal from the pH main monitoring device 450 is within a preset pH value range, it controls the pH main regulating valve 430 not to adjust the amount of pH main regulating agent (e.g., NaOH) provided by the pH main regulating pipe 420; when the processor determines that the monitoring signal from the pH main monitoring device 450 is below a certain value range... When the pH value is within the preset range, the main pH regulating valve 430 is controlled to increase the amount of pH regulating agent provided by the main pH regulating pipe 420, so that the pH value of the wastewater subsequently input into the coagulation device is within the preset pH value range; when the processor determines that the monitoring signal of the main pH monitoring device 450 is greater than the preset pH value range, the main pH regulating valve 430 is controlled to decrease the amount of pH regulating agent provided by the main pH regulating pipe 420, so that the pH value of the wastewater subsequently input into the coagulation device is within the preset pH value range, while also saving costs.

[0125] In summary, the wastewater treatment system can automatically adjust the amount of pH regulator provided by the pH main regulating pipe 420 according to the monitoring signal of the wastewater in the pH main regulating tank 410, so as to match the wastewater provided by the plant. Therefore, it can improve the wastewater treatment efficiency and reduce the amount of pH regulator used, thus saving wastewater treatment costs.

[0126] In some embodiments, the wastewater treatment system may further include a pH main agitator 440, which is fixedly disposed in the pH main regulating tank 410, and the main body of the pH main agitator 440 is located inside the pH main regulating tank 410 to agitate the wastewater in the pH main regulating tank 410. This allows the pH main regulator to be fully mixed with the wastewater, thereby improving the utilization efficiency of the pH main regulator.

[0127] In some embodiments, the wastewater treatment system may further include a pH adjustment device.

[0128] Specifically, the first end of the pH regulating device is connected to the third end of the main pH regulating device, the second end of the pH regulating device is connected to the pH regulating agent supply end, and the third end of the pH regulating device is connected to the first end of the coagulation device.

[0129] Specifically, the main pH regulating device provides wastewater with a pre-adjusted pH value to the secondary pH regulating device, the secondary pH regulating agent supplying the secondary pH regulating agent to the secondary pH regulating device, the wastewater in the secondary pH regulating device undergoes secondary pH adjustment, and the secondary pH-adjusted wastewater enters the coagulation device for coagulation operation.

[0130] It should be noted that the pH main regulating device performs preliminary pH adjustment on the wastewater at the plant end. The pH value of the adjusted wastewater deviates to a certain extent from the preset pH value. The pH secondary regulating device can improve the accuracy of the pH value of the wastewater that finally reaches the coagulation device by performing secondary precise adjustment on the pH value of the wastewater provided by the pH main regulating device.

[0131] It should be noted that the pH adjuster can be an alkaline liquid such as sodium hydroxide (NaOH) or an acidic liquid such as sulfuric acid (H2SO4). The specific type of pH adjuster can be determined according to the type of wastewater, the type of coagulant, the type of flocculant, and the pH value of the wastewater provided by the main pH regulating device.

[0132] In one specific application example, the wastewater is crystal back grinding wastewater, the coagulant is PAC, the flocculant is PAM, when the pH value of the wastewater provided by the main pH regulating device is 7, the secondary pH regulator is NaOH to adjust the pH value of the wastewater to 8 to 9; when the pH value of the wastewater provided by the main pH regulating device is 10, the secondary pH regulator is H2SO4 to adjust the pH value of the wastewater to 8 to 9.

[0133] In some embodiments, the pH regulating device may include a pH regulating tank 510, a pH regulating pipe 520, and a pH regulating valve 530.

[0134] Specifically, the first end of the pH regulating tank 510 is connected to the third end of the main pH regulating tank 410, the third end of the pH regulating tank 510 is connected to the coagulation device, the pH regulating pipe 520 is a three-way pipe, the first end of the pH regulating pipe 520 is connected to the second end of the pH regulating tank 510, the second end of the pH regulating pipe 520 is connected to the alkaline liquid supply port of the pH regulating agent supply end, and the third end of the pH regulating pipe 520 is connected to the acidic liquid supply port of the pH regulating agent supply end; the pH regulating valve 530 is a three-way valve, installed on the pH regulating pipe 520, used to adjust the amount of pH regulating agent supplied from the second end of the pH regulating pipe 520 to the first end of the pH regulating pipe 520, and the amount of pH regulating agent supplied from the third end of the pH regulating pipe 520 to the first end of the pH regulating pipe 520.

[0135] It should be noted that the first end of the pH regulating device is the first end of the pH regulating tank 510, the second end of the pH regulating device is the second and third ends of the pH regulating tube 520, and the third end of the pH regulating device is the third end of the pH regulating tank 510.

[0136] In some embodiments, the pH control valve 530 may be an electrically controlled valve or a manually controlled valve.

[0137] In some embodiments, the wastewater treatment system may further include a pH monitoring element 550, which is disposed on the pH adjustment tank 510, and the probe of the pH monitoring element 550 is located inside the pH adjustment tank 510.

[0138] In actual use, the probe of the pH monitoring device 550 is located in the wastewater of the pH adjustment tank 510, thereby enabling the monitoring of the pH value of the wastewater in the pH adjustment tank 510.

[0139] In some embodiments, the pH monitoring element 550 may be a pH meter.

[0140] In some embodiments, the pH regulating valve 530 is an electrically controlled valve, and the processor is coupled to the pH monitoring element 550 and the pH regulating valve 530 to control the pH regulating valve 530 to adjust the type and amount of pH regulator supplied by the pH regulating pipe 520 to the pH regulating tank 510 according to the monitoring signal of the pH monitoring element 550.

[0141] In a specific application scenario, the pH monitoring device 550 sends the pH value of the wastewater (e.g., crystal back grinding wastewater) in the pH adjustment tank 510 to the processor. The processor processes the monitoring signal from the pH monitoring device 550: when the processor determines that the monitoring signal from the pH monitoring device 550 is within a preset pH value range, it controls the pH adjustment valve 530 not to adjust the type and amount of pH adjuster provided by the pH adjustment pipe 520; when the processor determines that the monitoring signal from the pH monitoring device 550 is below the preset pH value range, it controls the pH adjustment valve... 530 connects the first end of the pH regulating pipe 520 to the second end of the regulating pipe (the second end of the regulating pipe is connected to the alkaline liquid end) so that the pH value of the wastewater subsequently input into the coagulation device is within a preset pH value range; when the processor determines that the monitoring signal of the pH monitoring device 550 is greater than the preset pH value range, it controls the pH regulating valve 530 to connect the first end of the pH regulating pipe 520 to the third end of the regulating pipe (the third end of the regulating pipe is connected to the acidic liquid end) so that the pH value of the wastewater subsequently input into the coagulation device is within the preset pH value range.

[0142] In summary, the wastewater treatment system can automatically adjust the amount of pH regulator provided by the pH regulating pipe 520 based on the monitoring signal of the wastewater in the pH regulating tank 510, thereby improving the accuracy of the pH value of the wastewater that finally reaches the coagulation device and thus improving the wastewater treatment efficiency.

[0143] In some embodiments, the wastewater treatment system may further include a pH agitator 540, which is fixed to the pH adjustment tank 510, and the main body of the pH agitator 540 is located inside the pH adjustment tank 510 to agitate the wastewater in the pH adjustment tank 510. This allows the pH regulator to be fully mixed with the wastewater, thereby improving the efficiency of the pH regulator.

[0144] In some embodiments, the wastewater treatment system may further include a neutralization device.

[0145] Specifically, the first end of the neutralization device is connected to the third end of the deposition device 200, the second end of the neutralization device is connected to the neutralizing agent supply end, the neutralizing agent supply end is used to supply neutralizing agent to the neutralization device, and the third end of the neutralization device is connected to the industrial drainage pipeline.

[0146] Specifically, the sedimentation device 200 is used to supply wastewater to the neutralization device, which is the supernatant after sedimentation. The neutralizing agent supply end is used to supply neutralizing agent to the neutralization device to adjust the pH value of the wastewater in the neutralization device to meet the pH value of industrial wastewater discharge standards. The adjusted wastewater is then discharged into the industrial wastewater pipeline.

[0147] It should be noted that the neutralizing agent can be an alkaline liquid such as sodium hydroxide (NaOH) or an acidic liquid such as sulfuric acid (H2SO4), and the specific type of the neutralizing agent can be determined according to the pH value of the waste liquid provided by the deposition device 200.

[0148] In one specific application example, the wastewater provided by the sedimentation device 200 has a pH value of 8 to 9, and the neutralizing agent is H2SO4 to adjust the pH value of the wastewater to 7.

[0149] In some embodiments, the neutralization device may include a neutralization tank 610, a neutralization pipe 620, and a neutralization valve 630.

[0150] Specifically, the first end of the neutralization tank 610 is connected to the deposition device 200, the third end of the neutralization tank 610 is connected to the industrial drainage pipeline, one end of the neutralization pipe 620 is connected to the second end of the neutralization tank 610, and the other end is connected to the neutralizing agent supply end; the neutralization valve 630 is disposed on the neutralization pipe 620 and is used to adjust the amount of neutralizing agent supplied by the neutralization pipe 620 to the neutralization tank 610.

[0151] It should be noted that the first end of the neutralization device is the first end of the neutralization tank 610, the second end of the neutralization device is the end of the neutralization tube 620 connected to the neutralizing agent supply end, and the third end of the neutralization device is the third end of the neutralization tank 610.

[0152] In some embodiments, the neutralization valve 630 may be an electrically controlled valve or a manually operated valve.

[0153] In some embodiments, the wastewater treatment system may further include a neutralization monitoring element 650, which is disposed on the neutralization tank 610 and the probe of the neutralization monitoring element 650 is located inside the neutralization tank 610.

[0154] In actual use, the probe of the neutralization monitoring device 650 is located in the wastewater of the neutralization tank 610, thereby enabling the monitoring of the pH value of the wastewater in the neutralization tank 610.

[0155] In some embodiments, the neutralization monitoring device 650 may be a pH meter.

[0156] In some embodiments, the neutralization valve 630 is an electrically controlled valve, and the processor is coupled to the neutralization monitoring element 650 and the neutralization valve 630 to control the neutralization valve 630 to adjust the amount of neutralizing agent provided by the neutralization tube 620 according to the monitoring signal of the neutralization monitoring element 650.

[0157] In one specific application scenario, the neutralization monitoring device 650 sends the pH value of the wastewater in the neutralization tank 610 to the processor. The processor processes the monitoring signal from the neutralization monitoring device 650: when the processor determines that the monitoring signal from the neutralization monitoring device 650 is within a preset pH range, it controls the neutralization valve 630 not to adjust the amount of neutralizing agent provided by the neutralization pipe 620; when the processor determines that the monitoring signal from the neutralization monitoring device 650 is below the preset pH range, it controls the neutralization valve 630 to increase the amount of neutralizing agent provided by the neutralization pipe 620, so that the pH value of the wastewater subsequently input into the coagulation device is within the preset pH range; when the processor determines that the monitoring signal from the neutralization monitoring device 650 is above the preset pH range, it controls the neutralization valve 630 to decrease the amount of neutralizing agent provided by the neutralization pipe 620, so that the pH value of the wastewater subsequently input into the coagulation device is within the preset pH range, while also saving costs.

[0158] In summary, the wastewater treatment system can automatically adjust the amount of neutralizing agent provided by the neutralization pipe 620 according to the monitoring signal of the wastewater in the neutralization tank 610, so as to match the wastewater provided by the sedimentation device 200. Therefore, it can improve the wastewater treatment efficiency and reduce the amount of neutralizing agent used, thus saving wastewater treatment costs.

[0159] In some embodiments, the wastewater treatment system may further include a neutralizing agitator 640, which is fixed to the neutralizing tank 610 and has its main body located inside the neutralizing tank 610 to agitate the wastewater inside the neutralizing tank 610. This allows the neutralizing agent to be fully mixed with the wastewater, thereby improving the efficiency of the neutralizing agent.

[0160] In some embodiments, the wastewater treatment system may further include a clarification device 700.

[0161] Specifically, the first end of the clarification device 700 is connected to the third end of the sedimentation device 200, and the third end of the clarification device 700 is connected to the first end of the neutralization tank 610, which is suitable for receiving the upper clear liquid after the wastewater is separated into layers, so as to perform secondary sedimentation of the clear liquid.

[0162] In some embodiments, the wastewater treatment system may further include a compression device 800.

[0163] Specifically, the compression device 800 is connected to the second end of the sedimentation device 200 and is adapted to receive the lower sediment layer after the wastewater has been stratified, so as to compress the sediment layer.

[0164] In this embodiment of the disclosure, a wastewater treatment method may also be provided.

[0165] Combined with reference Figure 1 and Figure 2 , Figure 2 A flowchart illustrating the steps of a wastewater treatment method according to an embodiment of this disclosure is shown. The wastewater treatment method is applied to a wastewater treatment system, wherein the wastewater treatment system includes a coagulation device and a sedimentation monitoring device, and the coagulation device includes a coagulation tank, a coagulation pipe, and a coagulation valve;

[0166] The method may include steps S11 to S13:

[0167] Step S11: Obtain the monitoring signal emitted by the deposition monitoring device, the monitoring signal being used to characterize the suspended particulate concentration of the wastewater in the deposition device;

[0168] Step S12: In response to the suspended particle concentration being greater than the first preset concentration, the amount of coagulant provided by the coagulation pipe is increased at a first adjustment rate until the suspended particle concentration is less than or equal to the first preset concentration.

[0169] Step S13: In response to the suspended particle concentration being less than the first preset concentration, the amount of coagulant provided by the coagulation pipe is reduced at a second adjustment rate until the suspended particle concentration rises to the first preset concentration, and the first adjustment rate is greater than the second adjustment rate.

[0170] Specifically, when the suspended particle concentration of the wastewater in the sedimentation device is greater than the first preset concentration, the amount of coagulant provided by the coagulation pipe is increased by a first adjustment rate. This allows the current dosage of the coagulant provided by the coagulation pipe to quickly exceed the target dosage of the coagulant. While reducing the adjustment time, the suspended particle concentration corresponding to the wastewater with an added coagulant exceeding the target dosage entering the sedimentation device is less than the first preset concentration. This means that when wastewater with an added coagulant exceeding the target dosage enters the sedimentation device and mixes with the wastewater in the previous sedimentation device where the suspended particle concentration exceeded the first preset concentration, the suspended particle concentration of the wastewater in the previous sedimentation device can be reduced, thereby improving the wastewater treatment capacity of the wastewater treatment system.

[0171] It should be noted that the sedimentation monitoring device directly monitors the wastewater in the sedimentation device, not the wastewater in the coagulation device. Wastewater in the coagulation device takes a certain amount of time to reach the sedimentation device, therefore the information represented by the monitoring signal of the sedimentation monitoring device is delayed. When the suspended particle concentration of the wastewater in the sedimentation device is less than the first preset concentration, the amount of coagulant provided by the coagulation pipe is reduced using the second adjustment rate. This can extend the adjustment time, compensate for the delay in the information represented by the monitoring signal of the sedimentation monitoring device, and reduce the probability of the suspended particle concentration of the wastewater in the sedimentation device exceeding the first preset concentration during the adjustment process.

[0172] It should be noted that the first preset difference is the concentration difference, and the unit of the first preset difference is the same as the unit of the first preset concentration.

[0173] Optionally, the first adjustment rate is greater than 10 times the second adjustment rate.

[0174] It should be noted that, in order to prevent adjustments from being made too frequently, a minimum adjustment interval can be set, such as 2 seconds.

[0175] This disclosure also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program that, when executed, performs the steps of the wastewater treatment method described in any of the foregoing embodiments. Specific steps can be found in the foregoing embodiments and will not be repeated here.

[0176] In some embodiments, the computer-readable storage medium may be various suitable readable storage media such as optical discs, hard disk drives, and solid-state drives.

[0177] This disclosure also provides a computer program product. The computer program product includes computer instructions, which, when executed by a processor, implement the steps of the wastewater treatment method described in any of the foregoing embodiments. Specific steps can be found in the foregoing embodiments and will not be repeated here.

[0178] It is understandable that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article indicates that the preceding and following related objects have an "or" relationship.

[0179] It is understood that "multiple" in this document refers to two or more. The descriptions of the first, second, third, fourth, etc., appearing in the embodiments of this application are only for illustration and to distinguish the described objects, and have no order, nor do they indicate a special limitation on the number of devices in the embodiments of this application, and cannot constitute any limitation on the embodiments of this application.

[0180] It is understood that the above description provides multiple embodiment solutions, and the optional methods described in each embodiment solution can be combined and cross-referenced with each other without conflict, thereby extending to a variety of possible embodiment solutions, all of which can be considered as the embodiment solutions disclosed in this disclosure.

[0181] While the embodiments disclosed herein are as described above, this disclosure is not limited thereto. Any person skilled in the art can make various alterations and modifications without departing from the spirit and scope of this disclosure; therefore, the scope of protection of this disclosure should be determined by the scope defined in the claims.

Claims

1. A wastewater treatment system, characterized in that, include: The coagulation device includes: A coagulation tank, the first end of which is connected to the plant maintenance end; A coagulation pipe, which is connected to the second end of the coagulation tank; A coagulation valve is disposed on the coagulation pipe; A sedimentation device, wherein a first end of the sedimentation device is connected to a third end of the coagulation tank; A sedimentation monitoring device, located within the sedimentation apparatus, is adapted to monitor the suspended particulate concentration of the chemical mechanical grinding wastewater within the sedimentation apparatus; A processor, coupled to the sedimentation monitoring device and the coagulation valve, is adapted to control the coagulation valve to adjust the amount of coagulant supplied by the coagulation pipe according to the monitoring signal of the sedimentation monitoring device, including: acquiring the monitoring signal emitted by the sedimentation monitoring device, the monitoring signal being used to characterize the suspended particulate concentration of wastewater in the sedimentation device; In response to the suspended particle concentration being greater than a first preset concentration, the amount of coagulant provided by the coagulation pipe is increased at a first adjustment rate until the suspended particle concentration is less than or equal to the first preset concentration. In response to the suspended particle concentration being less than a first preset concentration, the amount of coagulant supplied by the coagulation pipe is reduced at a second adjustment rate until the suspended particle concentration rises to the first preset concentration; The first adjustment rate is greater than 10 times the second adjustment rate; The plant terminal is adapted to provide the chemical mechanical grinding wastewater; The wastewater treatment system further includes: a neutralization device adapted to adjust the pH of the upper clear liquid after the wastewater has been separated into layers; wherein the neutralization device includes: a neutralization tank; a neutralization pipe connected to a second end of the neutralization tank and adapted to provide a neutralizing agent into the neutralization tank; a neutralization valve disposed on the neutralization pipe; and a neutralization monitoring element located within the neutralization tank and adapted to monitor the pH value of the wastewater in the neutralization tank; wherein the processor is coupled to the neutralization monitoring element and the neutralization valve and adapted to control the neutralization valve to adjust the amount of neutralizing agent provided by the neutralization pipe according to the monitoring signal from the neutralization monitoring element. The wastewater treatment system further includes a clarification device, the first end of which is connected to the third end of the sedimentation device, and the third end of which is connected to the first end of the neutralization tank, adapted to receive the upper clear liquid after the wastewater has been separated into layers, for secondary sedimentation of the clear liquid.

2. The wastewater treatment system according to claim 1, characterized in that, Also includes: Flocculation device, the flocculation device comprising: A flocculation tank, the first end of which is connected to the third end of the coagulation tank; the third end of the flocculation tank is connected to the first end of the sedimentation device. A flocculation pipe is connected to the second end of the flocculation tank and is used to supply flocculant into the flocculation tank; A flocculation valve is provided on the flocculation pipe to adjust the amount of flocculant supplied by the flocculation pipe; The processor is coupled to the flocculation valve and is adapted to control the flocculation valve to adjust the amount of flocculant supplied by the flocculation pipe according to the monitoring signal of the deposition monitoring device.

3. The wastewater treatment system according to claim 2, characterized in that, Also includes: A coagulation agitator is fixedly disposed in the coagulation tank, and the main body of the coagulation agitator is located inside the coagulation tank to agitate the wastewater in the coagulation tank. And / or, a flocculation agitator, the flocculation agitator being fixed to the flocculation tank, with the main body of the flocculation agitator located inside the flocculation tank, to agitate the wastewater inside the flocculation tank.

4. The wastewater treatment system according to claim 1, characterized in that, Also includes: A pH main regulating device, adapted to adjust the pH of wastewater supplied by the plant; wherein, the pH main regulating device includes: A pH main regulating tank, the first end of which is connected to the plant end, and the third end of which is connected to the first end of the coagulation tank; A pH main regulating pipe is connected to the second end of the pH main regulating tank and is adapted to provide pH main regulating agent into the pH main regulating tank. A pH main regulating valve is disposed on the pH main regulating pipe; A pH main monitoring device is located inside the pH main regulating tank and is suitable for monitoring the pH value of wastewater in the pH main regulating tank.

5. The wastewater treatment system according to claim 4, characterized in that, Also includes: A pH adjustment device, adapted to perform secondary pH adjustment on the wastewater supplied by the main pH adjustment device; wherein, the pH adjustment device includes: The pH adjustment tank has a first end connected to the third end of the main pH adjustment tank, and the third end of the pH adjustment tank is connected to the first end of the coagulation tank. A pH regulating tube is connected to the second end of the pH regulating tank and is adapted to provide a pH regulating agent into the pH regulating tank. A pH regulating valve is provided on the pH regulating pipe; A pH monitoring device is located inside the pH adjustment tank and is suitable for monitoring the pH value of the wastewater in the pH adjustment tank.

6. The wastewater treatment system according to claim 5, characterized in that, The processor is coupled to the main pH monitoring device and the main pH regulating valve, and is adapted to control the main pH regulating valve to adjust the amount of main pH regulator provided by the main pH regulating tube according to the monitoring signal of the main pH monitoring device; And / or, the processor is coupled to the pH monitoring device and the pH regulating valve, and is adapted to control the pH regulating valve to adjust the type and amount of pH regulator supplied by the pH regulating tube according to the monitoring signal of the pH monitoring device.

7. The wastewater treatment system according to claim 5, characterized in that, Also includes: A pH main agitator is fixedly disposed in the pH main regulating tank, and the main body of the pH main agitator is located inside the pH main regulating tank to agitate the wastewater in the pH main regulating tank. And / or, pH from a stirring element, the pH from a stirring element being fixed to the pH from a regulating tank, and the main body of the pH from a stirring element being located inside the pH from a regulating tank, so as to stir the wastewater in the pH from a regulating tank.

8. The wastewater treatment system according to claim 1, characterized in that, Also includes: A compression device, connected to the second end of the sedimentation device, is adapted to receive the lower sediment layer after the wastewater has been stratified, in order to compress the sediment.

9. A wastewater treatment method, characterized in that, Applied to a wastewater treatment system, the wastewater treatment system includes a coagulation device, a sedimentation device and a sedimentation monitoring device, the coagulation device includes a coagulation tank, a coagulation pipe and a coagulation valve; The method includes: The monitoring signal emitted by the deposition monitoring device is acquired, and the monitoring signal is used to characterize the suspended particulate concentration of the chemical mechanical grinding wastewater in the deposition device; In response to the suspended particle concentration being greater than a first preset concentration, the amount of coagulant provided by the coagulation pipe is increased at a first adjustment rate until the suspended particle concentration is less than or equal to the first preset concentration. In response to the suspended particle concentration being less than a first preset concentration, the amount of coagulant supplied by the coagulation pipe is reduced at a second adjustment rate until the suspended particle concentration rises to the first preset concentration; The first adjustment rate is greater than 10 times the second adjustment rate; The wastewater treatment system further includes: a neutralization device adapted to adjust the pH of the supernatant after the wastewater has been separated into layers; wherein the neutralization device includes: a neutralization tank, a first end of which is connected to a third end of the sedimentation device; a neutralization pipe connected to a second end of the neutralization tank, adapted to provide a neutralizing agent into the neutralization tank; a neutralization valve disposed on the neutralization pipe; and a neutralization monitoring element located within the neutralization tank, adapted to monitor the pH value of the wastewater in the neutralization tank; wherein a processor is coupled to the neutralization monitoring element and the neutralization valve, adapted to control the neutralization valve to adjust the amount of neutralizing agent provided by the neutralization pipe according to the monitoring signal from the neutralization monitoring element. The wastewater treatment system further includes: a clarification device, the first end of which is connected to the third end of the sedimentation device, and the third end of which is connected to the first end of the neutralization tank, adapted to receive the upper clear liquid after the wastewater has been separated into layers, so as to perform secondary sedimentation of the clear liquid; The method further includes: the neutralization monitoring device sending the pH value of the wastewater in the neutralization tank to the processor; the processor processing the monitoring signal from the neutralization monitoring device: when the processor determines that the monitoring signal from the neutralization monitoring device is within a preset pH value range, it controls the neutralization valve not to adjust the amount of neutralizing agent provided by the neutralization pipe; when the processor determines that the monitoring signal from the neutralization monitoring device is below the preset pH value range, it controls the neutralization valve to increase the amount of neutralizing agent provided by the neutralization pipe; when the processor determines that the monitoring signal from the neutralization monitoring device is above the preset pH value range, it controls the neutralization valve to decrease the amount of neutralizing agent provided by the neutralization pipe.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program runs, it performs the steps of the wastewater treatment method as described in claim 9.

11. A computer program product comprising computer instructions, characterized in that, When the computer instructions are executed by the processor, they implement the steps of the wastewater treatment method as described in claim 9.

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