CN114262659B - Automatic bacteria culturing system for marine domestic sewage treatment device - Google Patents
Automatic bacteria culturing system for marine domestic sewage treatment device Download PDFInfo
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- CN114262659B CN114262659B CN202111467583.5A CN202111467583A CN114262659B CN 114262659 B CN114262659 B CN 114262659B CN 202111467583 A CN202111467583 A CN 202111467583A CN 114262659 B CN114262659 B CN 114262659B
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- anoxic
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- 239000010865 sewage Substances 0.000 title claims abstract description 41
- 241000894006 Bacteria Species 0.000 title claims abstract description 24
- 238000012258 culturing Methods 0.000 title claims abstract description 18
- 230000001105 regulatory effect Effects 0.000 claims abstract description 93
- 238000005273 aeration Methods 0.000 claims abstract description 78
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 239000012528 membrane Substances 0.000 claims abstract description 50
- 239000007788 liquid Substances 0.000 claims abstract description 43
- 238000010992 reflux Methods 0.000 claims abstract description 37
- 239000010802 sludge Substances 0.000 claims abstract description 33
- 238000012544 monitoring process Methods 0.000 claims abstract description 26
- 239000007789 gas Substances 0.000 claims description 38
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 22
- 239000001301 oxygen Substances 0.000 claims description 22
- 229910052760 oxygen Inorganic materials 0.000 claims description 22
- 239000000523 sample Substances 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 14
- 230000002950 deficient Effects 0.000 claims description 4
- 239000003814 drug Substances 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 3
- 230000001580 bacterial effect Effects 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 244000005700 microbiome Species 0.000 description 10
- 206010021143 Hypoxia Diseases 0.000 description 5
- 230000029219 regulation of pH Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 241000235342 Saccharomycetes Species 0.000 description 1
- 241001052560 Thallis Species 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000007954 hypoxia Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Activated Sludge Processes (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention relates to an automatic bacteria culturing system for a ship domestic sewage treatment device, which comprises a regulating cabinet, a conveying pump, an anoxic cabinet, an aerobic cabinet, a membrane cabinet, a suction pump, a clean water cabinet, an electric control system, a temperature control system, an on-line monitoring system, a pH regulating and dosing system, a conveying system, a liquid level sensor, an aeration system and a reflux system, wherein the regulating cabinet is connected with the temperature control and the on-line monitoring system and is provided with a liquid level sensor, the regulating cabinet is connected with the anoxic cabinet through the conveying system, the anoxic cabinet and the aerobic cabinet are connected with the aeration system and the on-line monitoring system, the aerobic cabinet is connected with the pH regulating and dosing system, the membrane cabinet is connected with the aerobic cabinet and a sludge cabinet through the reflux system, the regulating cabinet, the anoxic cabinet, the aerobic cabinet, the membrane cabinet, the clean water cabinet and the sludge cabinet are connected with the discharge system, and the temperature control system, the on-line monitoring system, the pH regulating and dosing system, the conveying system, the liquid level sensor, the aeration system, the reflux system and the discharge system are all connected with the electric control system.
Description
Technical Field
The invention relates to an automatic bacteria culturing system, in particular to a control system suitable for a bacteria culturing stage of a ship domestic sewage treatment device.
Background
At present, a ship domestic sewage treatment device mainly adopts a biochemical treatment and membrane filtration combined treatment mode, and a biochemical section utilizes microorganisms in activated sludge to remove organic pollutants in wastewater. The microorganisms in the activated sludge comprise single-cell or multi-cell organisms such as bacteria, radiological bacteria, mould, saccharomycetes, protozoa and the like, and the microorganisms need nutrition in the continuous metabolism process, namely, under the condition of oxygen, the microorganisms oxidize and decompose organic substances in the wastewater through the action of enzymes, and the organic substances are absorbed and synthesized into thalli. The pollutant removal effect depends on the growth condition of microorganisms in the activated sludge, so that bacteria cultivation is an important link for starting operation of the ship domestic sewage treatment device.
The cultivation stage usually adopts a stuffy aeration mode (namely aeration is performed without sewage) to enable the sludge to rapidly increase to the required concentration, then continuous water inflow operation is started, and typical microorganisms appear in cultivation for about 5 days under the common concentration load. However, in the bacteria culturing process, the sewage state and equipment control are mainly observed, detected and adjusted manually, and the success rate of bacteria culturing is too dependent on the experience level of bacteria culturing personnel. Meanwhile, the domestic sewage treatment device is different according to the running conditions of ships in different running areas, the situation that the device needs to restart bacteria cultivation under a treatment mode after the long-term direct sewage discharging working condition is frequently existed, and the artificial bacteria cultivation caused by working condition switching consumes too much manpower and time because the informatization and intelligent degree of the domestic sewage treatment device of the real ship equipment are not high.
Therefore, an automatic bacteria culturing system suitable for the ship domestic sewage treatment device is needed.
Disclosure of Invention
The invention aims to provide an automatic bacteria culturing system for a ship domestic sewage treatment device, which is used for reducing manual operation of a shipman in a bacteria culturing stage of the device, reducing manpower consumption and time consumption and improving the bacteria culturing success rate.
In order to solve the technical problems, the invention adopts the following technical scheme:
The utility model provides an automatic fungus system of cultivating for boats and ships domestic sewage processing apparatus, includes regulating cabinet, delivery pump, oxygen deficiency cabinet, good oxygen cabinet, membrane cabinet, suction pump, clean water cabinet, electrical control system, temperature control system, on-line monitoring system, pH regulation dosing system, delivery system, level sensor, aeration system, return system, regulating cabinet links to each other with temperature control and on-line monitoring system to be equipped with level sensor, regulating cabinet links to each other with oxygen deficiency cabinet through delivery system, oxygen deficiency cabinet and good oxygen cabinet link to each other with aeration system and on-line monitoring system, good oxygen cabinet links to each other with pH regulation dosing system, membrane cabinet links to each other with good oxygen cabinet and mud cabinet through return system, regulating cabinet, oxygen deficiency cabinet, good oxygen cabinet, membrane cabinet, clean water cabinet link to each other with discharge system, temperature control system, on-line monitoring system, pH regulation dosing system, delivery system, level sensor, aeration system, return system, discharge system all link to each other with electrical control system.
Further, the temperature control system comprises a heater and a temperature controller, the temperature controller comprises a sensor probe and a control element, the temperature range of the temperature controller is 25-30+/-3 ℃, the sensor probe of the temperature controller detects the liquid level temperature in the regulating cabinet every 4 hours, the sewage temperature in the regulating cabinet is detected to be lower than a set value, the heater is automatically started, the temperature of the regulating cabinet detected by the probe reaches the set value, and the heater is automatically stopped.
Further, the online monitoring system comprises a regulating cabinet pH sensor, a regulating cabinet UV254 sensor, an anoxic cabinet pH sensor, an anoxic cabinet DO sensor, an aerobic cabinet pH sensor, an aerobic cabinet DO sensor and an aerobic cabinet UV254 sensor, wherein the regulating cabinet pH sensor and the regulating cabinet UV254 sensor are arranged in the regulating cabinet; the anoxic cabinet pH sensor and the anoxic cabinet DO sensor are arranged in the anoxic cabinet; the pH sensor of the aerobic cabinet, the DO sensor of the aerobic cabinet and the UV254 sensor of the aerobic cabinet are arranged in the aerobic cabinet, and the pH sensor of the aerobic cabinet is connected with the pH adjusting and dosing system.
Further, the pH sensor of the regulating cabinet and the pH sensor of the aerobic cabinet are respectively used for detecting the pH value of sewage in the regulating cabinet and the aerobic cabinet, and the pH sensor of the aerobic cabinet is connected with a pH regulating and dosing system; the regulating cabinet UV254 sensor and the aerobic cabinet UV254 sensor are respectively used for detecting the COD concentration of sewage in the regulating cabinet and the aerobic cabinet, and the detecting time of the regulating cabinet UV254 sensor and the detecting time of the aerobic cabinet UV254 sensor are synchronous; the oxygen-deficient cabinet DO sensor and the aerobic cabinet DO sensor are respectively used for detecting the dissolved oxygen concentration of sewage in the oxygen-deficient cabinet and the aerobic cabinet and are connected with the aeration system through the electrical control system.
Further, the pH adjusting and dosing system comprises a pH adjusting and dosing pump, a pH adjusting and dosing tank and a pipeline, and is connected with a pH sensor of the aerobic cabinet through an electrical control system; when the pH sensor of the aerobic cabinet detects that the pH value of sewage in the aerobic cabinet exceeds a set value, the pH adjusting dosing pump is automatically started, and alkali liquor is added into the aerobic cabinet from the pH adjusting medicine box, so that the pH value of the sewage in the aerobic cabinet reaches a set range, and the pH adjusting dosing pump is automatically stopped.
Further, the aeration system comprises a fan, a gas distributor, a pipeline, an anoxic tank aeration electric valve, an anoxic tank aeration pipe, an aerobic tank aeration adjusting electric valve, an aerobic tank aeration disc, a membrane tank aeration adjusting electric valve and a membrane tank aeration pipe, wherein the gas distributor is connected with the anoxic tank aeration electric valve and the anoxic tank aeration pipe through the pipeline, and the aeration system adjusts the opening of the anoxic tank aeration electric valve to adjust the dissolved oxygen of the anoxic tank within a control range through the detection data of an anoxic tank DO probe; the gas distributor is connected with the aerobic cabinet aeration electric valve and the aerobic cabinet aeration disc through pipelines, and the aeration system adjusts the opening of the aerobic cabinet aeration electric valve through the detection data of the aerobic cabinet DO probe to adjust the dissolved oxygen of the aerobic cabinet in a control range; the gas distributor is connected with the membrane cabinet aeration electric valve and the membrane cabinet aeration pipe through pipelines.
Further, the conveying system is used for connecting the regulating cabinet and the anoxic cabinet and comprises a conveying pump inlet valve, a conveying pump, an electromagnetic flowmeter, a conveying pump outlet electric valve, a conveying pump outlet check valve and a conveying pump reflux valve, and is connected with a liquid level sensor in the regulating cabinet through an electric control system, when sewage in the regulating cabinet reaches the position of the middle liquid level sensor, the conveying pump is automatically started, and when the liquid level is lower than the position of the low liquid level sensor, the conveying pump is automatically stopped.
Further, the output flow of the conveying pump is divided into the water flow entering the anoxic cabinet and the reflux flow; the water inflow of the anoxic cabinet is transmitted to the electrical control system according to the detection flow of the electromagnetic flowmeter, and the water inflow of the anoxic cabinet is regulated and controlled by adjusting the opening of the electric valve of the pump outlet.
Further, a membrane module and a membrane cabinet aeration pipe are arranged in the membrane cabinet, and effluent of the membrane module is conveyed to the clean water cabinet through a suction pump; the high, medium and low liquid level sensors in the clean water cabinet are connected with the discharge system through the electrical control system.
Further, the discharge system is connected with each cabinet chamber of the regulating cabinet, the anoxic cabinet, the aerobic cabinet, the membrane cabinet, the clean water cabinet and the sludge cabinet through a discharge valve and a pipeline; the reflux system comprises a gas distributor, a gas stripping electric valve, a reflux electric valve-aerobic cabinet, a reflux electric valve-sludge cabinet and corresponding pipelines, wherein the gas distributor of the reflux system is connected with the aerobic cabinet through the gas stripping electric valve, a gas stripping pipe and the reflux electric valve-aerobic cabinet, the gas distributor of the reflux system is connected with the sludge cabinet through the gas stripping electric valve, the gas stripping pipe and the reflux electric valve-sludge cabinet, and the upper part of the sludge cabinet is connected with the anoxic cabinet through the pipelines.
The beneficial effects of the invention are as follows:
1. The on-line monitoring system is arranged to monitor the control parameters affecting the growth of the microorganisms in real time, thereby being beneficial to creating a proper growth range for the microorganisms.
2. The temperature control system, the pH adjusting dosing system, the conveying system, the aeration system and the reflux system are arranged, the detection data of the online monitoring system are combined, and the electric control system can control the water temperature, the pH, the inflow and the dissolved oxygen within a set range suitable for the growth of microorganisms, so that the success rate of culturing bacteria is improved.
Drawings
FIG. 1 is an automatic bacteria culturing system and a flow chart for a ship domestic sewage treatment device of the present invention;
In the figure: 1. an electrical control system, a discharge pump, a sludge cabinet, a regulating cabinet, a conveying pump, a hypoxia cabinet, an aerobic cabinet, a membrane cabinet, a clear water cabinet, a fan, a gas distributor, a pH regulating medicine box, a pH regulating medicine adding pump, a suction pump, a sludge cabinet discharge valve, a pH sensor, a regulating cabinet, a UV254 sensor, a high liquid level sensor and a water level sensor. 44, regulator tank level sensor, 45, regulator tank low level sensor, 46, regulator tank drain valve, 47, temperature controller, 48, heater, 51, transfer pump inlet valve, 52, electromagnetic flowmeter, 53, transfer pump outlet electric valve, 54, transfer pump outlet check valve, 55, transfer pump return valve, 61, anoxic tank pH sensor, 62, anoxic tank DO sensor. 63, 64, 65, 71, 72, 73, UV254 74, 75, 76, 81, 82, 83, gas stripping electric valve 84, a membrane tank aeration electric valve, 85, a backflow electric valve-aerobic tank, 86, a backflow electric valve-sludge tank, 87, a membrane tank liquid level sensor, 88, a membrane tank discharge valve, 91, a clean water tank high liquid level sensor, 92, a clean water tank liquid level sensor, 93, a clean water tank low liquid level sensor, 94, a clean water tank discharge valve, 141, a suction pump inlet valve, 142 and a suction pump outlet check valve.
Detailed Description
In order to make the advantages and technical solutions of the present invention clearer and more specific, the present invention will be described in detail with reference to specific embodiments.
As shown in figure 1, the automatic bacteria culturing system for the ship domestic sewage treatment device comprises a ship domestic sewage treatment device, an electric control system 1, a temperature control system, an on-line monitoring system, a pH adjusting and dosing system, a conveying system, a liquid level sensor, an aeration system and a reflux system, wherein the ship domestic sewage treatment device consists of a sludge cabinet 3, an adjusting cabinet 4, a conveying pump 5, an anoxic cabinet 6, an aerobic cabinet 7, a membrane cabinet 8, a suction pump 14 and a clear water cabinet 9.
The regulating cabinet 4 is connected with the temperature control system, the regulating cabinet 4 is connected with the on-line monitoring system, and is provided with a regulating cabinet high liquid level sensor 43, a regulating cabinet middle liquid level sensor 44 and a regulating cabinet low liquid level sensor 45, and the regulating cabinet 4 is provided with three liquid level sensors of high, medium and low for controlling the automatic start and stop of the conveying pump 5. The regulating cabinet 4 is connected with the anoxic cabinet 6 through a conveying system, the anoxic cabinet 6 and the aerobic cabinet 7 are connected with an aeration system and are connected with an on-line monitoring system, the aerobic cabinet 7 is connected with a pH regulating and dosing system, and the membrane cabinet 8 is connected with the aerobic cabinet 7 and the sludge cabinet 3 through a backflow system. The regulating cabinet 4, the anoxic cabinet 6, the aerobic cabinet 7, the membrane cabinet 8, the clean water cabinet 9 and the sludge cabinet 3 are connected with a discharge system. The temperature control system, the on-line monitoring system, the pH adjusting dosing system, the conveying system, the liquid level sensor, the aeration system, the reflux system and the discharge system are all connected with the electrical control system.
The temperature control system includes a heater 48 and a temperature controller 47, the temperature controller 47 containing a sensor probe and control elements. The temperature controller controls the temperature range to be 25-30 (+/-3) DEG C, a sensor probe of the temperature controller detects the liquid level temperature in the regulating cabinet 4 every 4 hours, the sewage temperature in the regulating cabinet 4 is detected to be lower than a set value, the heater 48 is automatically started, the probe detects that the temperature of the regulating cabinet 4 reaches the set value, and the heater 48 is automatically stopped.
The on-line monitoring system comprises an adjusting cabinet pH sensor 41, an adjusting cabinet UV254 sensor 42, an anoxic cabinet pH sensor 61, an anoxic cabinet DO sensor 62, an aerobic cabinet pH sensor 71, an aerobic cabinet DO sensor 72 and an aerobic cabinet UV254 sensor 73. Wherein:
the regulating cabinet pH sensor 41 and the regulating cabinet UV254 sensor 42 are arranged in the regulating cabinet 4 and are connected with a pH regulating and dosing system. The anoxic tank pH sensor 61 and the anoxic tank DO sensor 62 are installed in the anoxic tank 6. The aerobic cabinet pH sensor 71, the aerobic cabinet DO sensor 72 and the aerobic cabinet UV254 sensor 73 are arranged in the aerobic cabinet 7.
The pH sensor is used for detecting the pH value of sewage in the regulating cabinet and the aerobic cabinet (detecting once every 12 hours), the pH sensor 71 of the aerobic cabinet is connected with a pH regulating and dosing system, and the system sets the pH regulating control range to be 7-8 (+ -0.2).
The pH adjusting dosing system comprises a pH adjusting dosing pump 13, a pH adjusting dosing tank 12 and a pipeline, and is connected with the pH sensor 71 of the aerobic cabinet through an electrical control system. According to the detection that the pH value of sewage in the aerobic cabinet exceeds a set value by the pH sensor 71 of the aerobic cabinet, the pH adjusting dosing pump 13 is automatically started, and alkali liquor is added into the aerobic cabinet 7 from the pH adjusting dosing tank 12, so that the pH value of the sewage in the aerobic cabinet 7 reaches a set range, and the pH adjusting dosing pump 13 is automatically stopped.
The UV254 sensor 42 is used for detecting the COD concentration of sewage in the regulating cabinet 4 and the aerobic cabinet 7, and the detection time of the regulating cabinet UV254 sensor 42 and the detection time of the aerobic cabinet UV254 sensor 73 are synchronous, and the detection is carried out every 12 hours.
The DO sensor is used for detecting the concentration of dissolved oxygen in the sewage in the cabinet body (detecting once every 4 hours), the DO sensor is connected with the aeration system through the electrical control system, the system sets the DO control range of the anoxic cabinet to be less than 0.6mg/L, and the DO control range of the aerobic cabinet is 2-5 mg/L.
The aeration system comprises a fan 10, a gas distributor 11, a pipeline, an anoxic tank aeration electric valve 63, an anoxic tank aeration pipe 64, an aerobic tank aeration electric valve 74, an aerobic tank aeration disc 75, a membrane tank aeration electric valve 84 and a membrane tank aeration pipe 82. The gas distributor 11 is connected with the oxygen-free tank aeration electric valve 63 and the oxygen-free tank aeration pipe 64 through pipelines, and the system adjusts the opening of the oxygen-free tank aeration electric valve 63 through oxygen-free tank DO probe detection data to adjust the dissolved oxygen of the oxygen-free tank 6 in a control range. The gas distributor 11 is connected with the aerobic cabinet aeration electric valve 74 and the aerobic cabinet aeration disc 75 through pipelines, and the system adjusts the opening of the aerobic cabinet aeration electric valve 74 through the detection data of the aerobic cabinet DO probe to adjust the dissolved oxygen of the aerobic cabinet 7 in a control range. The gas distributor 11 is connected with the membrane cabinet aeration electric valve 84 and the membrane cabinet aeration pipe 82 through pipelines.
The conveying system is used for connecting the regulating cabinet 4 and the anoxic cabinet 6 and comprises a conveying pump inlet valve 51, a conveying pump 5, an electromagnetic flowmeter 52, a conveying pump outlet electric valve 53, a conveying pump outlet check valve 54 and a conveying pump return valve 55. The conveying system is connected with a liquid level sensor in the regulating cabinet 4 through an electrical control system, sewage in the regulating cabinet 4 reaches the liquid level sensor 44 in the regulating cabinet, the conveying pump 5 is automatically started, the liquid level is lower than the low liquid level sensor 45 of the regulating cabinet, and the conveying pump 5 is automatically stopped.
The output flow of the delivery pump 5 is divided into the water quantity entering the anoxic tank 6 and the reflux flow. The water inflow of the anoxic tank 6 is transmitted to an electrical control system according to the flow detected 52 by the electromagnetic flowmeter, and the water inflow of the anoxic tank 6 is regulated and controlled by regulating the opening of the electric valve 53 at the outlet of the conveying pump.
The membrane module 81 and the membrane cabinet aeration pipe 82 are arranged in the membrane cabinet 8, and the effluent of the membrane module 81 is conveyed to the clean water cabinet 9 through the suction pump 14.
The clean water tank 9 is internally provided with a clean water tank high liquid level sensor 91, a clean water tank middle liquid level sensor 92 and a clean water tank low liquid level sensor 93, and the clean water tank liquid level sensor is connected with a discharge system through an electrical control system.
The discharge system is connected with each cabinet chamber of the regulating cabinet 4, the anoxic cabinet 6, the aerobic cabinet 7, the membrane cabinet 8, the clean water cabinet 9 and the sludge cabinet 3 through discharge valves and pipelines.
The reflux system comprises a gas distributor 11, a gas stripping electric valve 83, a reflux electric valve-aerobic cabinet 85, a reflux electric valve-sludge cabinet 86 and corresponding pipelines. The gas distributor 11 of the reflux system is connected with the aerobic cabinet 7 through the gas stripping electric valve 83, the gas stripping pipe and the reflux electric valve-aerobic cabinet 85, and the gas distributor 11 of the reflux system is connected with the sludge cabinet 3 through the gas stripping electric valve 83, the gas stripping pipe and the reflux electric valve-sludge cabinet 86. The upper part of the sludge cabinet 3 is connected with an anoxic cabinet 6 through a pipeline.
The invention regulates and controls the control factors of water quantity, water temperature, pH and dissolved oxygen parameters affecting the growth of microorganisms through a temperature control system, an on-line monitoring system, a pH regulating dosing system, a conveying system, a liquid level sensor, an aeration system and a reflux system, determines COD removal rate according to the detected COD concentration of water inlet and outlet, and judges a bacterial culturing end point, wherein the bacterial culturing is divided into 4 stages of 'stuffy aeration-30% water inlet-60% water inlet-100% water inlet', and the specific flow is as follows:
1) After the device is started after water is fed, an electric control system utilizes an online detection system to collect pH, temperature and COD parameters of the fed water, and the system automatically selects a preset automatic bacteria culture control program to start bacteria culture.
2) The water level of the regulating cabinet reaches the liquid level sensor in the regulating cabinet, the conveying pump is automatically started, the anoxic cabinet, the aerobic cabinet and the membrane cabinet sequentially enter water until the water level of the membrane cabinet reaches the middle position, the conveying pump is stopped, and the anoxic cabinet, the aerobic cabinet and the membrane cabinet enter the smoldering and exposing stage.
3) Setting the time of the stuffy and aerated stage to be 3 days, starting the aeration system and the online monitoring system, and keeping the reflux system, the conveying system and the discharge system in a closed state. The online monitoring system and the aeration system detect and regulate and control dissolved oxygen in the anoxic tank and the aerobic tank for every 4 hours, so that the DO control range of the anoxic tank is less than 0.6mg/L, the DO control range of the aerobic tank is 2-5 mg/L, and the pH value of the aerobic tank is 7-8 (+ -0.2) after every 12 hours.
4) After the aeration is finished, the opening of the electric valve of the pump outlet of the conveying pump is regulated to enable the water inlet of the anoxic tank to reach 30% of the designed flow, the anoxic tank starts to enter a water inlet stage of 30%, the anoxic tank is opened to return to the aerobic tank system in the aeration stage state, the membrane tank sludge is returned to the aerobic tank, the supernatant liquid is discharged to the clean water tank, the discharge valve at the bottom of the clean water tank is opened, the discharge system is controlled according to the liquid level sensor of the clean water tank, the discharge pump is opened at the middle position, and the pump is stopped at the low position. And 3, controlling the online monitoring system and the aeration system in the same step, detecting the COD concentration of the inflow water and the COD concentration of the aerobic cabinet, and when the COD removal rate of the system reaches 75%, ending the stage and switching to the next stage.
5) After the 30% water inflow is finished, the opening of the electric valve of the pump outlet of the conveying pump is regulated, so that the water inflow of the anaerobic tank reaches 60% of the designed flow, the anaerobic tank starts to flow back to the aerobic tank and flow back to the anaerobic tank in a state of the 30% water inflow stage, 50% of the membrane tank sludge flows back to the aerobic tank, 50% of the membrane tank sludge flows back to the sludge tank, and the supernatant of the sludge tank flows to the anaerobic tank. The membrane assembly is started at this stage, the effluent of the membrane assembly is pumped to the clean water cabinet by the suction pump, the discharge valve at the bottom of the clean water cabinet is opened, the discharge system is controlled according to the liquid level sensor of the clean water cabinet, the discharge pump is started at the middle position, and the pump is stopped at the low position. The online monitoring system and the aeration system are controlled in the same step 3, the COD concentration of the inflow water and the COD concentration of the aerobic cabinet are detected, and when the COD removal rate of the system reaches 75%, the step is ended, and the next step is carried out.
6) After 60% water inlet is finished, the electric valve of the pump outlet of the conveying pump is adjusted to be fully opened, 100% water inlet is realized by the anoxic cabinet, and all control system settings in the stage are consistent with those in the stage of 60% water inlet. And detecting the COD concentration of the inflow water and the COD concentration of the aerobic cabinet, and judging that the bacteria cultivation is finished when the COD removal rate of the system reaches 75%, so that the device can enter the normal treatment working condition.
Claims (2)
1. An automatic bacterial culturing system for a ship domestic sewage treatment device, which is characterized in that: comprises a regulating cabinet, a delivery pump, an anoxic cabinet, an aerobic cabinet, a membrane cabinet, a suction pump, a clean water cabinet, an electrical control system, a temperature control system, an on-line monitoring system, a pH regulating dosing system, a delivery system, a liquid level sensor, an aeration system and a reflux system, wherein the regulating cabinet is connected with the temperature control system and the on-line monitoring system and is provided with the liquid level sensor, the regulating cabinet is connected with the anoxic cabinet through the delivery system, the anoxic cabinet and the aerobic cabinet are connected with the aeration system and the on-line monitoring system, the aerobic cabinet is connected with the pH regulating dosing system, the membrane cabinet is connected with the aerobic cabinet and the sludge cabinet through the reflux system, the temperature control system, the on-line monitoring system, the pH adjusting dosing system, the conveying system, the liquid level sensor, the aeration system, the reflux system and the discharge system are all connected with the electric control system; the online monitoring system comprises a regulating cabinet pH sensor, a regulating cabinet UV254 sensor, an anoxic cabinet pH sensor, an anoxic cabinet DO sensor, an aerobic cabinet pH sensor, an aerobic cabinet DO sensor and an aerobic cabinet UV254 sensor, wherein the regulating cabinet pH sensor and the regulating cabinet UV254 sensor are arranged in the regulating cabinet; the anoxic cabinet pH sensor and the anoxic cabinet DO sensor are arranged in the anoxic cabinet; the pH sensor of the aerobic cabinet, the DO sensor of the aerobic cabinet and the UV254 sensor of the aerobic cabinet are arranged in the aerobic cabinet, and the pH sensor of the aerobic cabinet is connected with the pH adjusting and dosing system; the pH sensor of the regulating cabinet and the pH sensor of the aerobic cabinet are respectively used for detecting the pH value of sewage in the regulating cabinet and the aerobic cabinet, and the pH sensor of the aerobic cabinet is connected with the pH regulating and dosing system; the regulating cabinet UV254 sensor and the aerobic cabinet UV254 sensor are respectively used for detecting the COD concentration of sewage in the regulating cabinet and the aerobic cabinet, and the detecting time of the regulating cabinet UV254 sensor and the detecting time of the aerobic cabinet UV254 sensor are synchronous; the oxygen-deficient cabinet DO sensor and the aerobic cabinet DO sensor are respectively used for detecting the dissolved oxygen concentration of sewage in the oxygen-deficient cabinet and the aerobic cabinet and are connected with the aeration system through the electrical control system; the pH adjusting dosing system comprises a pH adjusting dosing pump, a pH adjusting dosing tank and a pipeline, and is connected with a pH sensor of the aerobic cabinet through an electrical control system; when the pH sensor of the aerobic cabinet detects that the pH value of sewage in the aerobic cabinet exceeds a set value, the pH adjusting dosing pump is automatically started, and alkali liquor is added into the aerobic cabinet from the pH adjusting medicine box, so that the pH value of the sewage in the aerobic cabinet reaches a set range, and the pH adjusting dosing pump is automatically stopped; the conveying system is used for connecting the regulating cabinet and the anoxic cabinet and comprises a conveying pump inlet valve, a conveying pump, an electromagnetic flowmeter, a conveying pump outlet electric valve, a conveying pump outlet check valve and a conveying pump reflux valve, and is connected with a liquid level sensor in the regulating cabinet through an electric control system, when sewage in the regulating cabinet reaches the position of the middle liquid level sensor, the conveying pump is automatically started, and when the liquid level is lower than the position of the low liquid level sensor, the conveying pump is automatically stopped; the output flow of the conveying pump is divided into the water flow entering the anoxic cabinet and the reflux flow; the water inflow of the anoxic cabinet is transmitted to an electrical control system according to the detection flow of the electromagnetic flowmeter, and the water inflow of the anoxic cabinet is regulated and controlled by regulating the opening of the electric valve of the pump outlet of the conveying pump; the discharge system is connected with each cabinet chamber of the regulating cabinet, the anoxic cabinet, the aerobic cabinet, the membrane cabinet, the clean water cabinet and the sludge cabinet through discharge valves and pipelines; the reflux system comprises a gas distributor, a gas stripping electric valve, a reflux electric valve-aerobic cabinet, a reflux electric valve-sludge cabinet and corresponding pipelines, wherein the gas distributor of the reflux system is connected with the aerobic cabinet through the gas stripping electric valve, a gas stripping pipe and the reflux electric valve-aerobic cabinet, the gas distributor of the reflux system is connected with the sludge cabinet through the gas stripping electric valve, the gas stripping pipe and the reflux electric valve-sludge cabinet, and the upper part of the sludge cabinet is connected with the anoxic cabinet through the pipelines; the temperature control system comprises a heater and a temperature controller, wherein the temperature controller comprises a sensor probe and a control element, the temperature controller controls the temperature range to be (25-30) +/-3 ℃, the sensor probe of the temperature controller detects the liquid level temperature in the regulating cabinet every 4 hours, the sewage temperature in the regulating cabinet is detected to be lower than a set value, the heater is automatically started, the probe detects the temperature of the regulating cabinet to reach the set value, and the heater is automatically stopped; the aeration system comprises a fan, a gas distributor, a pipeline, an anoxic tank aeration electric valve, an anoxic tank aeration pipe, an aerobic tank aeration adjustment electric valve, an aerobic tank aeration disc, a membrane tank aeration adjustment electric valve and a membrane tank aeration pipe, wherein the gas distributor is connected with the anoxic tank aeration electric valve and the anoxic tank aeration pipe through the pipeline, and the aeration system adjusts the opening of the anoxic tank aeration electric valve to adjust the oxygen dissolved in a control range through anoxic tank DO probe detection data; the gas distributor is connected with the aerobic cabinet aeration electric valve and the aerobic cabinet aeration disc through pipelines, and the aeration system adjusts the opening of the aerobic cabinet aeration electric valve through the detection data of the aerobic cabinet DO probe to adjust the dissolved oxygen of the aerobic cabinet in a control range; the gas distributor is connected with the membrane cabinet aeration electric valve and the membrane cabinet aeration pipe through pipelines.
2. An automatic bacteria cultivation system for a ship domestic sewage treatment apparatus according to claim 1, wherein: a membrane module and a membrane cabinet aeration pipe are arranged in the membrane cabinet, and effluent of the membrane module is conveyed to the clean water cabinet through a suction pump; the high, medium and low liquid level sensors in the clean water cabinet are connected with the discharge system through the electrical control system.
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