Intelligent sewage treatment device based on SERS technology and treatment method thereof

Abstract

The invention discloses an intelligent sewage treatment device based on an SERS (Surface Enhanced Raman Scattering) technology, an SERS detector and a peristaltic pump are mounted on a cabinet body of the intelligent sewage treatment device, an inlet end of the peristaltic pump is connected to a purification cabinet, an outlet end of the peristaltic pump is led to the SERS detector, and the SERS detector and the peristaltic pump are electrically connected with an intelligent controller; the cabinet body is provided with medicine storage tanks and a dosing pump, and each medicine storage tank is led to the purification cabinet through the dosing pump; each dosing pump is electrically connected with the intelligent controller; a membrane cabinet aerator is arranged in the membrane cabinet, the membrane cabinet aerator comprises an aeration box, an elastic air bag is arranged in the aeration box, the aeration box is further communicated with a plurality of air guide cups, and blowing and jumping balls are movably placed in the air guide cups. The invention also discloses a sewage treatment process method. According to the invention, the treatment parameters can be adjusted according to the transient water quality, the water quality treatment index can be stabilized, and the normal working time of the membrane module is effectively prolonged.

Description

Technical Field

[0001] The present invention relates to a treatment device for treating domestic sewage of ships, and in particular to an intelligent sewage treatment device using SERS technology and closed-loop control. The present invention also relates to a method for purifying domestic sewage of ships using the sewage treatment device. Background Art

[0002] As people pay more attention to marine environmental pollution, the International Maritime Organization (IMO) has continuously improved the standards for domestic sewage discharge from ships. In terms of domestic sewage discharge control, IMO has not only increased the requirements for sewage discharge indicators such as TSS, COD and BOD, but also increased multiple indicators such as pH value, ammonia nitrogen and total phosphorus. Since ship sewage treatment devices are affected by specific factors such as small equipment space and large fluctuations in sewage flow, ship sewage treatment devices often need to have higher sewage treatment efficiency.

[0003] At present, the more mature domestic sewage treatment devices for ships mostly include process devices such as biological treatment cabinets, electrocoagulation cabinets and membrane bioreactors (MBR). Through the combined application of these multiple processes to strengthen the sewage treatment effect, the biological treatment and electrocoagulation treatment effects are effectively improved. However, the treatment process and treatment process parameters of most ship sewage treatment devices are fixed and unchanged, and the treatment parameters cannot be adjusted and controlled in time according to the components and pollution degree of sewage pollutants. The results of this treatment method lead to some adverse consequences. When the pollution degree of the incoming water is high, it is difficult to ensure the discharge purification standard requirements of the treated discharge water. When the pollution degree of the incoming water is relatively low, the redundancy of the treatment parameters will be formed, which will waste energy and reduce the treatment efficiency. In addition, these existing treatment devices need to be staffed during operation, which increases the operation and treatment costs.

[0004] The "domestic sewage closed-loop control treatment device" applied for and authorized by the applicant on January 15, 2021, this patented technical solution sets a turbidity sensor in its turbidity cabinet and is connected to a TOC meter. At the same time, a conductivity sensor and a pH sensor are set at the water outlet of the vacuum pump. According to the sewage pollution index values ​​transmitted by each sensor, the closed-loop control module controls the air supply time of the blower and the electric flocculation current density to automatically control the timely treatment parameters of the sorting system, thereby greatly improving the sewage treatment efficiency and realizing unattended automatic operation. However, the technical solution of this patent still shows some shortcomings after actual operation: First, the actual effect of the electric flocculation device including positive and negative electrodes is very stable, especially after a period of use, the dirt attached to the electrode plate directly affects the electric field strength between the two plates, causing the flocculation effect to decrease or even lose, thereby affecting the treatment efficiency of the entire treatment system; secondly, the filter membrane assembly in the membrane cabinet is easy to adsorb pollutants, causing the filter membrane assembly to be contaminated, the extraction water pass rate to deteriorate, the water filtration rate to decrease, the extraction negative pressure to increase, the system energy consumption to increase, the extraction resistance to increase, and the efficiency to be greatly reduced. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide an intelligent sewage treatment device based on SERS technology, which can not only adjust its treatment parameters according to transient water quality, but also stabilize water quality treatment indicators and effectively extend the normal working time of the membrane assembly. The present invention also provides a method for sewage treatment using the sewage treatment device.

[0006] In order to solve the above technical problems, the intelligent sewage treatment device based on SERS technology of the present invention comprises a cabinet body, in which an anaerobic cabinet, a contact oxidation cabinet, a purification cabinet and a membrane cabinet are separated; a turbidity sensor is arranged in the anaerobic cabinet, an aerator of the contact oxidation cabinet is arranged in the contact oxidation cabinet, and a filter membrane group is arranged in the membrane cabinet, and the water outlet end of the filter membrane group is connected to a shoulder vacuum pump, and a conductivity sensor and / or a pH sensor is arranged at the water outlet position of the vacuum pump; the turbidity sensor, the conductivity sensor and the pH sensor are electrically connected to the intelligent controller, and a SERS detector and a peristaltic pump are installed on the cabinet body, and the inlet end of the peristaltic pump is connected to the purification cabinet, and the outlet end of the peristaltic pump leads to the SE The RS detector, the SERS detector and the peristaltic pump are electrically connected to the intelligent controller; a medicine storage tank 1 and a medicine dosing pump 1 are installed on the cabinet, and the medicine storage tank 1 is connected to the purification cabinet via the medicine dosing pump 1; a medicine storage tank 2 and a medicine dosing pump 2 are installed on the cabinet, and the medicine storage tank 2 is connected to the purification cabinet via the medicine dosing pump 2; a medicine storage tank 3 and a medicine dosing pump 3 are installed on the cabinet, and the medicine storage tank 3 is connected to the purification cabinet via the medicine dosing pump 3; the medicine dosing pump 1, the medicine dosing pump 2 and the medicine dosing pump 3 are electrically connected to the intelligent controller; a membrane cabinet aerator is arranged in the membrane cabinet, and the membrane cabinet aerator includes an aeration box, in which an elastic air bag is arranged, and the aeration box is also connected to a plurality of air guide cups, in which a blowing and jumping ball is movably placed.

[0007] Preferably, the membrane cabinet aerator is located below the filter membrane group, the membrane cabinet fan is connected to the aeration box cavity of the membrane cabinet aerator through the membrane cabinet air supply valve, and the membrane cabinet fan is electrically connected to the intelligent controller.

[0008] Preferably, the lower section of the wind guide cup is cylindrical, the upper section of the wind guide cup is inverted conical, and the cone angle α of the inverted conical tube is 20°-30°; the diameter of the blowing and jumping ball is larger than the diameter of the cylindrical section of the wind guide cup, and the blowing and jumping ball is a stainless steel ball.

[0009] Preferably, an agitator is installed on the cabinet, a stirring paddle of the agitator extends into the purification cabinet, and a stirring drive motor of the agitator is electrically connected to the intelligent controller.

[0010] Preferably, the medicine storage tank 1, medicine storage tank 2 and medicine storage tank 3 are respectively filled with flocculants, pH regulators and disinfectants; the medicine dosing pump 1, medicine dosing pump 2 and medicine dosing pump 3 are electronic micro-injection pumps, and each electronic micro-injection pump is electrically connected to the intelligent controller.

[0011] Preferably, the biological cabinet fan is connected to the contact oxidation cabinet aerator through the biological cabinet air supply valve, and the driving motor of the biological cabinet fan is electrically connected to the intelligent controller.

[0012] Preferably, the turbidity sensor, SERS detector, peristaltic pump, conductivity sensor and pH sensor are electrically connected to the intelligent controller.

[0013] The present invention uses the above-mentioned sewage treatment device to treat sewage, and the treatment method comprises the following steps:

[0014] (1) Domestic sewage is transported to an anaerobic tank, and the turbidity sensor in the anaerobic tank transmits the sewage turbidity value to the intelligent controller, which calculates the sewage treatment strategy including aeration time and aeration stop time according to the turbidity value;

[0015] (2) After the sewage is placed in the hypobaric oxygen tank for 10 to 20 minutes, it is transported to the contact oxidation tank. The intelligent controller starts the biological tank fan according to the sewage turbidity value to oxygenate and aerate the sewage in the contact oxidation tank for 10 to 30 minutes, so that the activated sludge can digest the organic matter in the sewage;

[0016] (3) 15 to 25 minutes after the aeration in the contact oxidation cabinet is stopped, the supernatant located at the upper layer after sedimentation separation in the contact oxidation cabinet is transported to the purification cabinet;

[0017] (4) When the supernatant wastewater in the purification cabinet reaches a high liquid level, the peristaltic pump takes a wastewater sample from the purification cabinet and sends it to the SERS detector. The SERS detector detects the TSS value, BOD, COD, pH value, and total nitrogen content of the wastewater, and transmits the detection data to the intelligent controller; the intelligent controller calculates the amount of flocculant injection based on the detection values;

[0018] (5) According to the above-mentioned flocculant injection amount, the intelligent controller instructs to start the dosing pump 1, and the dosing pump 1 pumps the flocculant from the storage tank 1 and injects it into the purification cabinet;

[0019] (6) The agitator in the purification cabinet starts to work for 5 to 10 minutes, and after standing for 10 to 15 minutes, the peristaltic pump starts again to pump the sewage sample from the purification cabinet to the SERS detector. The SERS detector calculates the injection amount of the pH regulator and the disinfectant based on the detection value;

[0020] (7) Start dosing pump 2 and dosing pump 3. The intelligent controller instructs dosing pump 2 and dosing pump 3 to pump corresponding medicines from medicine storage tank 2 and medicine storage tank 3 respectively and inject them into the purification cabinet; medicine storage tank 2 contains pH regulator; medicine storage tank 3 contains disinfectant;

[0021] (8) The agitator in the purification cabinet is restarted. After the agitator works for 5-10 minutes, it is allowed to stand for 10-15 minutes, and then the standing sewage is transported to the membrane cabinet;

[0022] (9) The membrane cabinet fan starts to start, and the membrane cabinet fan supplies air to the membrane cabinet aerator through the membrane cabinet air supply valve. The membrane cabinet aerator forms a gap stirring sewage flow while performing oxygen aeration; after the membrane cabinet fan works for 20-30 minutes, the aeration is stopped for 10-30 minutes;

[0023] (10) Start the vacuum pump to extract clean water from the membrane group. When the water level in the membrane cabinet reaches the set low level, the vacuum pump stops working and the static sewage in the purification cabinet is transported to the membrane cabinet again;

[0024] (11) While the vacuum pump is working, the conductivity sensor and the pH sensor detect the corresponding values ​​in the extracted water and transmit the detected values ​​to the intelligent controller;

[0025] (12) The intelligent controller calculates the oxygen aeration time of the contact oxidation cabinet based on the measured conductivity value and pH value and combined with the turbidity sensor value correction calculation;

[0026] (13) The above treatment procedure is repeated in a cycle to discharge the extracted water from the membrane cabinet out of the cabinet.

[0027] Furthermore, the SERS detector includes a SERS sensor and a SERS substrate; and the intelligent controller is a PLC controller.

[0028] Furthermore, the flocculant is an organic flocculant, the pH adjuster is sodium carbonate or sodium bicarbonate; and the disinfectant is hydrogen peroxide.

[0029] Compared with the prior art problems, the present invention has the following technical advantages:

[0030] Since the SERS detector used in the above technical solution can timely detect the transient indicators of sewage purification treatment in the purification cabinet, and the SERS signal intensity of the pollutant molecules is closely related to the electromagnetic and chemical enhancement capabilities of the SERS substrate and the depth of the pollutant molecules, the SERS detector can quickly, accurately and sensitively obtain the components and concentrations of pollutants in the sewage, and the SERS detector transmits the transient pollutant information in the sewage to the intelligent controller in real time, and the intelligent controller adjusts and controls the aeration time and time point of the contact oxidation cabinet according to the set value and the control program, as well as the injection time and injection amount of various reagents in the purification cabinet to ensure the purification effect of sewage treatment. In addition, since a turbidity sensor is provided in the anaerobic cabinet, and a conductivity sensor and a PH sensor are provided at the water outlet of the vacuum pump, the detection data of the two are also transmitted to the intelligent controller, and the intelligent controller instructs each aeration device and the reagent injection device to accurately control the sewage treatment with accurate time points, accurate aeration amounts and accurate reagent injection amounts, which not only has high treatment efficiency and stable purification and drainage indicators, but also is conducive to energy saving and consumption reduction, and reduces water treatment costs. Also, because three groups of dosing tanks and their corresponding dosing pumps are connected to the purification cabinet, the dosing tanks and dosing pumps can dosing according to the dosage of the medicine accurately calculated by the intelligent controller, not only the dosage is accurate, the dosing time is accurate, but also the automatic intelligent dosing operation is realized, ensuring that the purified water quality meets the treatment requirements. Also, because a membrane cabinet aerator is arranged below the membrane cabinet filter group, the elastic airbag and the blowing ball in the membrane cabinet aerator enable the aerator to generate intermittent impact airflow and flushing water flow, so that while achieving aeration, it can produce a flushing and cleaning effect on the filter membrane group, achieving the self-cleaning function of the membrane cabinet filter membrane group, greatly extending the normal and efficient operation time of the filter membrane group, and ensuring the extraction efficiency and water quality requirements of the filter membrane group. The treatment method of the present invention is adopted, and the operation effect and sewage treatment capacity of the treatment device are guaranteed, forming a stable sewage treatment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] Figure 1 It is a structural schematic diagram of a specific implementation mode of the present invention;

[0033] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of the middle membrane cabinet aerator.

[0034] In the figure, 1 is a cabinet, 2 is a membrane cabinet aerator, 3 is a partition three, 4 is an agitator, 5 is a partition two, 6 is a contact oxidation cabinet aerator, 7 is a soft filler, 8 is an anaerobic cabinet, 9 is a partition one, 10 is a turbidity sensor, 11 is a contact oxidation cabinet, 12 is a sewage inlet, 13 is a biological cabinet air supply valve, 14 is a biological cabinet fan, 15 is an intelligent controller, 16 is a SERS detector, 17 is a peristaltic pump, 18 is a drug storage tank one, 19 is a drug dosing pump one, 20 is a drug storage tank two, 21 is a drug dosing pump two, 22 is an agitator drive motor, 23 is a drug dosing pump three, 24 is a drug storage tank three, 25 is a membrane cabinet fan, 26 is a membrane cabinet air supply valve, 27 is a purification cabinet, 28 is a membrane cabinet, 29 is a vacuum pump, 30 is a conductivity sensor, 31 is a pH sensor, and 32 is a filter membrane group. DETAILED DESCRIPTION

[0035] like Figure 1 The intelligent sewage treatment device based on SERS technology shown in the figure includes a cabinet 1 welded from carbon steel plates, and the cabinet 1 is in the shape of a regular hexahedron. The cabinet 1 is divided into an anaerobic cabinet 8, a contact oxidation cabinet 11, a purification cabinet 27 and a membrane cabinet 28 by partitions 1 9, 2 5 and 3 3 in turn. A turbidity sensor 10 is arranged in the anaerobic cabinet 8, and the turbidity reflects the amount of suspended matter and the degree of turbidity in the sewage; the turbidity sensor 10 is electrically connected to the intelligent controller 15, and the intelligent controller 15 is a PLC controller. The turbidity sensor 10 converts the sewage turbidity into an electrical signal and transmits it to the intelligent controller 15. A sewage input port 12 is installed in the cabinet 1, and the sewage input port 12 leads to the anaerobic cabinet 8.

[0036] A soft filler 7 and a contact oxidation cabinet aerator 6 are provided in the contact oxidation cabinet 11. Both the soft filler 7 and the contact oxidation cabinet aerator 6 are made of common materials and common structures of marine sewage treatment devices. The soft filler 7 is located below the contact oxidation cabinet aerator 6. A biological cabinet fan 14 installed on the cabinet body 1 leads to the contact oxidation cabinet aerator 6 through a biological cabinet air supply valve 13. The biological cabinet fan 14 is a centrifugal blower, and the biological cabinet air supply valve 13 is a stop valve. The driving motor of the biological cabinet fan 14 is electrically connected to the intelligent controller 15, and the intelligent controller 15 controls the start and stop of the biological cabinet fan 14. A SERS detector 16 and a peristaltic pump 17 are also installed on the top of the cabinet 1. The SERS detector 16 includes a SERS sensor and a SERS substrate. The inlet end of the peristaltic pump 17 is connected to the purification cabinet 27 through a water intake pipe, and the outlet end of the peristaltic pump 17 is connected to the SERS detector 16, so that the sewage sample in the purification cabinet 27 can be pumped to the SERS detector 16. The SERS detector 16 is electrically connected to the intelligent controller 15. The SERS detector 16 transmits the detection data of the sewage sample to the intelligent controller 15. The intelligent controller 15 is electrically connected to the peristaltic pump 17 and instructs the peristaltic pump 17 to start and stop.

[0037] The cabinet 1 is also fixedly installed with a medicine storage tank 18 and a medicine dosing pump 19. The medicine storage tank 18 contains a flocculant, which is an organic flocculant. The medicine dosing pump 19 is an electronic micro-injection pump. The medicine dosing pump 19 is electrically connected to the intelligent controller 15, and the intelligent controller 15 controls the operation and shutdown of the medicine dosing pump 19. The medicine storage tank 18 leads to the purification cabinet 27 through the medicine dosing pump 19, so as to pump an appropriate amount of flocculant into the purification cabinet 27.

[0038] A medicine storage tank 20 and a medicine dosing pump 21 are also fixedly installed on the cabinet 1. The medicine storage tank 20 contains a pH regulator, which is sodium carbonate or sodium bicarbonate. The medicine dosing pump 21 is an electronic micro-injection pump. The medicine dosing pump 21 is electrically connected to the intelligent controller 15, and the intelligent controller 15 controls the operation and shutdown of the medicine dosing pump 21. The medicine storage tank 20 leads to the purification cabinet 27 through the medicine dosing pump 21, so as to pump an appropriate amount of pH regulator into the purification cabinet 27.

[0039] A medicine storage tank 3 24 and a medicine dosing pump 3 23 are also fixedly installed on the cabinet 1. The medicine storage tank 3 24 contains a disinfectant, which is hydrogen peroxide. The medicine dosing pump 3 23 is an electronic micro-injection pump. The medicine dosing pump 3 23 is electrically connected to the intelligent controller 15, and the intelligent controller 15 controls the operation and shutdown of the medicine dosing pump 3 23. The medicine storage tank 3 24 leads to the purification cabinet 27 through the medicine dosing pump 3 23, so as to pump an appropriate amount of disinfectant into the purification cabinet 27.

[0040] An agitator 4 is fixedly mounted on the cabinet 1, and an agitator drive motor 22 of the agitator 4 is electrically connected to the intelligent controller 15. The agitator drive motor 22 adopts a multi-layer stirring blade structure, and its stirring blades extend into the purification cabinet 27 so that the sewage and the medicine can be fully and evenly mixed by stirring.

[0041] A membrane group 32 and a membrane cabinet aerator 2 are provided in the membrane cabinet 28. The membrane cabinet aerator 2 is located below the membrane group 32. The membrane cabinet fan 25 is connected to the membrane cabinet aerator 2 through the membrane cabinet air supply valve 26. The membrane cabinet fan 25 is a centrifugal blower, and the membrane cabinet air supply valve 26 is a stop valve. The driving motor of the membrane cabinet fan 25 is electrically connected to the intelligent controller 15. The intelligent controller 15 controls the start-up and shutdown of the membrane cabinet fan 25 to realize oxygenation aeration or stop aeration of the membrane cabinet.

[0042] The outlet water end of the filter membrane group 32 is connected to the vacuum pump 29. The water outlet of the vacuum pump 29 is installed with a conductivity sensor 30 and a pH sensor 31. The conductivity sensor 30 and the pH sensor 31 transmit the detection value of the discharged water to the intelligent controller 15 electrically connected thereto, so that the intelligent controller 15 can calculate the control data.

[0043] like Figure 2As shown, the membrane cabinet aerator 2 includes an aeration box 201, and the air inlet 203 of the aeration box 201 is connected to the membrane cabinet fan 25. A plurality of elastic air bags 202 are arranged in the aeration box 201, and the elastic air bags 202 are rubber balls filled with nitrogen and have an energy storage function. A plurality of air guide cups 204 are also fixedly installed vertically upward on the aeration box 201. The air guide cups 204 are made of nylon material. The lower section of the air guide cups 204 is in the shape of a circular tube, and the upper section of the air guide cups 204 is in the shape of an inverted cone tube. The cone angle α of the cone tube is controlled within the range of 20°-30°. A blowing and jumping ball 205 is movably placed in the air guide cups 204. The blowing and jumping ball 205 is a stainless steel ball. The ball diameter of the blowing and jumping ball 205 is larger than the diameter of the straight tube section at the lower section of the air guide cups 204, and the ball diameter of the blowing and jumping ball 205 is smaller than the diameter of the pipe mouth of the cone tube at the upper section of the air guide cups 204, so that the blowing and jumping ball 205 can move in the cone tube of the air guide cups 204.

[0044] The intelligent sewage treatment device of the present invention is controlled by the instruction of the intelligent controller, and the sewage treatment method thereof comprises the following steps:

[0045] (1) Domestic sewage is transported to an anaerobic tank. The turbidity sensor in the anaerobic tank transmits the turbidity value of the sewage to the intelligent controller. The intelligent controller calculates the sewage treatment strategy including aeration time and aeration stop time according to the turbidity value.

[0046] (2) After the sewage is kept in the oxygen-deficient tank for 10 to 20 minutes, it is transported to the contact oxidation tank. The intelligent controller starts the biological tank fan according to the sewage turbidity value to oxygenate and aerate the sewage in the contact oxidation tank for 10 to 30 minutes, so that the activated sludge can decompose the organic matter in the sewage.

[0047] (3) 15 to 25 minutes after the aeration in the contact oxidation cabinet stops, the supernatant located at the upper layer after sedimentation separation in the contact oxidation cabinet is transported to the purification cabinet.

[0048] (4) When the supernatant wastewater in the purification cabinet reaches a high liquid level, the peristaltic pump pumps a wastewater sample in the purification cabinet and sends it to the SERS detector. The SERS detector detects the TSS value, BOD, COD, pH value, total nitrogen content and other values ​​of the wastewater, and transmits the detection data to the intelligent controller; the intelligent controller calculates the amount of flocculant injection based on the detection values; the SERS detector includes a SERS sensor and a SERS substrate; the intelligent controller is a PLC controller.

[0049] (5) According to the above-mentioned flocculant injection amount, the intelligent controller instructs to start the dosing pump 1, and the dosing pump 1 pumps the flocculant from the storage tank 1 and injects it into the purification cabinet; the flocculant is an organic flocculant.

[0050] (6) The agitator in the purification cabinet starts to work for 5 to 10 minutes, and then stands for 10 to 15 minutes. The peristaltic pump starts again to pump the sewage sample from the purification cabinet to the SERS detector. The SERS detector calculates the injection amount of the pH regulator and disinfectant based on the detection value.

[0051] (7) Start dosing pump 2 and dosing pump 3. The intelligent controller instructs dosing pump 2 and dosing pump 3 to pump corresponding reagents from storage tank 2 and storage tank 3 respectively and inject them into the purification cabinet; storage tank 2 contains a pH adjuster; storage tank 3 contains a disinfectant; the pH adjuster is sodium carbonate or sodium bicarbonate; the disinfectant is hydrogen peroxide.

[0052] (8) The agitator in the purification cabinet is restarted. After the agitator works for 5-10 minutes, it is allowed to stand for 10-15 minutes, and then the standing sewage is transported to the membrane cabinet.

[0053] (9) The membrane cabinet fan starts to start, and the membrane cabinet fan supplies air to the membrane cabinet aerator through the membrane cabinet air supply valve. The membrane cabinet aerator forms an intermittent stirring sewage flow while performing oxygenation and aeration. After the membrane cabinet fan works for 20-30 minutes, the aeration is stopped for 10-30 minutes.

[0054] (10) Start the vacuum pump to extract clean water from the membrane group. When the water level in the membrane cabinet reaches the set low level, the vacuum pump stops working and the static sewage in the purification cabinet is transported to the membrane cabinet again.

[0055] (11) While the vacuum pump is working, the conductivity sensor and the pH sensor detect the corresponding values ​​in the extracted water and transmit the detection values ​​to the intelligent controller.

[0056] (12) The intelligent controller calculates the oxygen aeration time of the contact oxidation cabinet based on the measured conductivity value and pH value and combined with the turbidity sensor value correction calculation.

[0057] (13) The above treatment procedure is repeated in a cycle to discharge the extracted water from the membrane cabinet out of the cabinet.

Claims

1. An intelligent sewage treatment device based on SERS technology, comprising a cabinet (1), wherein the cabinet (1) is divided into an anaerobic cabinet (8), a contact oxidation cabinet (11), a purification cabinet (27) and a membrane cabinet (28); a turbidity sensor (10) is arranged in the anaerobic cabinet (8), a contact oxidation cabinet aerator (6) is arranged in the contact oxidation cabinet (11), and a filter membrane group (32) is arranged in the membrane cabinet (28), wherein the water outlet end of the filter membrane group (32) is connected to a shoulder vacuum pump (29), and a conductivity sensor (30) and / or a pH sensor (31) are arranged at the water outlet position of the vacuum pump (29); the turbidity sensor (10), the conductivity sensor (30) and the pH sensor (31) are electrically connected to an intelligent controller (15), characterized in that: The cabinet (1) is provided with a SERS detector (16) and a peristaltic pump (17), the inlet end of the peristaltic pump (17) is connected to the purification cabinet (27), the outlet end of the peristaltic pump (17) is connected to the SERS detector (16), and the SERS detector (16) and the peristaltic pump (17) are electrically connected to the intelligent controller (15); the cabinet (1) is provided with a drug storage tank (18) and a drug dosing pump (19), the drug storage tank (18) is connected to the purification cabinet (27) via the drug dosing pump (19); the cabinet (1) is provided with a drug storage tank (20) and a drug dosing pump (21), the drug storage tank (20) is connected to the purification cabinet (27) via the drug dosing pump (21); cabinet (27); a medicine storage tank (23) and a medicine dosing pump (24) are installed on the cabinet body (1), and the medicine storage tank (23) is connected to the purification cabinet (27) through the medicine dosing pump (24); the medicine dosing pump (19), the medicine dosing pump (21) and the medicine dosing pump (24) are electrically connected to the intelligent controller (15); a membrane cabinet aerator (2) is arranged in the membrane cabinet (28), and the membrane cabinet aerator (2) includes an aeration box (201), an elastic air bag (202) is arranged in the aeration box (201), and the aeration box (201) is also connected to a plurality of air guide cups (204), and a blowing and jumping ball (205) is movably placed in the air guide cup (204).

2. The intelligent sewage treatment device based on SERS technology according to claim 1 is characterized in that: The membrane cabinet aerator (2) is located below the filter membrane group (32), and the membrane cabinet fan (25) is connected to the aeration box (201) chamber of the membrane cabinet aerator (2) through the membrane cabinet air supply valve (26). The membrane cabinet fan (25) is electrically connected to the intelligent controller (15).

3. The intelligent sewage treatment device based on SERS technology according to claim 1 or 2, characterized in that: The lower section of the wind guide cup (204) is in the shape of a cylindrical tube, and the upper section of the wind guide cup (204) is in the shape of an inverted cone tube, wherein the cone angle α of the inverted cone tube is 20°-30°; the ball diameter of the blowing and jumping ball (205) is larger than the tube diameter of the cylindrical tube section of the wind guide cup (204), and the blowing and jumping ball (205) is a stainless steel ball.

4. The intelligent sewage treatment device based on SERS technology according to claim 1 is characterized in that: The cabinet (1) is provided with an agitator (4), a stirring paddle of the agitator (4) extends into the purification cabinet (27), and a stirring drive motor (22) of the agitator (4) is electrically connected to the intelligent controller (15).

5. The intelligent sewage treatment device based on SERS technology according to claim 1 is characterized in that: The drug storage tank 1 (18), drug storage tank 2 (20) and drug storage tank 3 (24) are respectively filled with flocculants, pH value regulators and disinfectants; the drug dosing pump 1 (19), drug dosing pump 2 (21) and drug dosing pump 3 (23) are electronic micro-injection pumps, and each electronic micro-injection pump is electrically connected to the intelligent controller (15).

6. The intelligent sewage treatment device based on SERS technology according to claim 1 is characterized in that: The biological cabinet fan (14) is connected to the contact oxidation cabinet aerator (6) through the biological cabinet air supply valve (13), and the driving motor of the biological cabinet fan (14) is electrically connected to the intelligent controller (15).

7. The intelligent sewage treatment device based on SERS technology according to claim 1 is characterized in that: The turbidity sensor (10), the SERS detector (16), the peristaltic pump (17), the conductivity sensor (30) and the pH sensor (31) are electrically connected to the intelligent controller (15).

8. A method for treating sewage using the sewage treatment device according to claim 1, characterized in that: The processing method comprises the following steps: (1) Domestic sewage is transported to an anaerobic tank, and the turbidity sensor in the anaerobic tank transmits the sewage turbidity value to the intelligent controller, which calculates the sewage treatment strategy including aeration time and aeration stop time according to the turbidity value; (2) After the sewage is placed in the hypobaric oxygen tank for 10 to 20 minutes, it is transported to the contact oxidation tank. The intelligent controller starts the biological tank fan according to the sewage turbidity value to oxygenate and aerate the sewage in the contact oxidation tank for 10 to 30 minutes, so that the activated sludge can digest the organic matter in the sewage; (3) 15 to 25 minutes after the aeration in the contact oxidation cabinet is stopped, the supernatant located at the upper layer after sedimentation separation in the contact oxidation cabinet is transported to the purification cabinet; (4) When the supernatant wastewater in the purification cabinet reaches a high liquid level, the peristaltic pump takes a wastewater sample from the purification cabinet and sends it to the SERS detector. The SERS detector detects the TSS value, BOD, COD, pH value, and total nitrogen content of the wastewater, and transmits the detection data to the intelligent controller; the intelligent controller calculates the amount of flocculant injection based on the detection values; (5) According to the above-mentioned flocculant injection amount, the intelligent controller instructs to start the dosing pump 1, and the dosing pump 1 pumps the flocculant from the storage tank 1 and injects it into the purification cabinet; (6) The agitator in the purification cabinet starts to work for 5 to 10 minutes, and after standing for 10 to 15 minutes, the peristaltic pump starts again to pump the sewage sample from the purification cabinet to the SERS detector. The SERS detector calculates the injection amount of the pH regulator and the disinfectant based on the detection value; (7) Start dosing pump 2 and dosing pump 3. The intelligent controller instructs dosing pump 2 and dosing pump 3 to pump corresponding medicines from medicine storage tank 2 and medicine storage tank 3 respectively and inject them into the purification cabinet; medicine storage tank 2 contains pH regulator; medicine storage tank 3 contains disinfectant; (8) The agitator in the purification cabinet is restarted. After the agitator works for 5-10 minutes, it is allowed to stand for 10-15 minutes, and then the standing sewage is transported to the membrane cabinet; (9) The membrane cabinet fan starts to start, and the membrane cabinet fan supplies air to the membrane cabinet aerator through the membrane cabinet air supply valve. The membrane cabinet aerator forms a gap stirring sewage flow while performing oxygen aeration; after the membrane cabinet fan works for 20-30 minutes, the aeration is stopped for 10-30 minutes; (10) Start the vacuum pump to extract clean water from the membrane group. When the water level in the membrane cabinet reaches the set low level, the vacuum pump stops working and the static sewage in the purification cabinet is transported to the membrane cabinet again; (11) While the vacuum pump is working, the conductivity sensor and the pH sensor detect the corresponding values ​​in the extracted water and transmit the detected values ​​to the intelligent controller; (12) The intelligent controller calculates the oxygen aeration time of the contact oxidation cabinet based on the measured conductivity value and pH value and combined with the turbidity sensor value correction calculation; (13) The above treatment procedure is repeated in a cycle to discharge the extracted water from the membrane cabinet out of the cabinet.

9. The sewage treatment method according to claim 8, characterized in that: The SERS detector comprises a SERS sensor and a SERS substrate; and the intelligent controller is a PLC controller.

10. The sewage treatment method according to claim 1, characterized in that: The flocculant is an organic flocculant, the pH value adjuster is sodium carbonate or sodium bicarbonate; and the disinfectant is hydrogen peroxide.

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