CN211078607U - Self-cleaning large-scale cultivation control device by utilizing immobilized microorganism water body - Google Patents
Self-cleaning large-scale cultivation control device by utilizing immobilized microorganism water body Download PDFInfo
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- CN211078607U CN211078607U CN201921830652.2U CN201921830652U CN211078607U CN 211078607 U CN211078607 U CN 211078607U CN 201921830652 U CN201921830652 U CN 201921830652U CN 211078607 U CN211078607 U CN 211078607U
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Abstract
The utility model relates to an utilize immobilization microorganism water automatically cleaning scale breeding control device. The device consists of a microprocessor, a nutrient source supplementing system, a self-cleaning system, an oxygenation system, an ammonia nitrogen and nitrite nitrogen monitoring system, a chemical and biochemical oxygen demand monitoring system and a controller; wherein the microprocessor contains a memory and an analog-to-digital converter; the microprocessor is respectively connected with the nutrient source supplementing system, the self-cleaning system, the ammonia nitrogen and nitrite nitrogen monitoring system and the chemical and biochemical oxygen demand monitoring system, the controller receives data monitored by the ammonia nitrogen and nitrite nitrogen monitoring system and the chemical and biochemical oxygen demand monitoring system, and the microprocessor determines whether to start a nutrient source input pump in the nutrient source supplementing system and a sewage pump in the sewage system according to the obtained data. By adopting the technical scheme, the water quality condition can be monitored in real time, the material of the immobilized filler has the capability of reducing the concentration of ammonia nitrogen in the water body, and the immobilized filler can be reused for many times after being cleaned.
Description
Technical Field
The utility model relates to a breed water treatment field, concretely relates to utilize immobilization microorganism water automatically cleaning scale cultivation controlling means.
Background
The current treatment technology of aquaculture sewage is mainly realized by changing water, filtering or culturing water-purifying microorganisms. Water resource is greatly wasted by water changing, and simultaneously, discharged sewage causes more pollution to the environment, which is not beneficial to the current policy of the era. The filtering method can effectively remove solid pollutants, and needs more careful filter membrane and energy consumption to filter the pollutants dissolved in water, and the cost is too high. The microorganism purification technology is suitable for the culture sewage treatment, but the microorganisms suspend in the water after growth and reproduction, the influence on the color and luster or the clarity of the water is great, the suspended microorganisms are enriched on the surface of the filler through the immobilized filler through the microorganism immobilization technology, the population advantages of the microorganisms can be exerted, the water quality can be purified, a certain amount of microorganism concentration can be kept, the water quality purification effect can be optimized compared with the microorganism flocs suspending in the water, the immobilized microorganism filler can adsorb impurities and microorganism cells in the water, the water quality is clearer, the microorganism purification technology is applied to a large-scale culture system, the labor cost is reduced, the survival rate is improved, and the economic benefit is higher.
Disclosure of Invention
To the condition of prior art, the utility model aims to provide a resources are saved, the operation is stable, one kind of effective performance automatically cleaning effect utilizes the microorganism scale aquaculture water automatically cleaning controlling means of immobilization.
In order to realize the technical purpose, the utility model discloses a technical scheme does:
a self-cleaning large-scale aquaculture control device utilizing immobilized water-purifying microorganisms is characterized in that the large-scale aquaculture control device is composed of a microprocessor, a nutrient source supplementing system, a self-cleaning system, an oxygenation system, an ammonia nitrogen and nitrite nitrogen monitoring system, a chemical and biochemical oxygen demand monitoring system and a controller; the microprocessor internally comprises a memory and an analog-to-digital converter, or the memory and the analog-to-digital converter are expanded outside the microprocessor according to requirements; the microprocessor is respectively connected with the nutrient source supplementing system, the self-cleaning system, the ammonia nitrogen and nitrite nitrogen monitoring system and the chemical and biochemical oxygen demand monitoring system, the controller receives ammonia nitrogen concentration, nitrite nitrogen concentration, BOD (biochemical oxygen demand) and COD (chemical oxygen demand) data monitored by the ammonia nitrogen and nitrite nitrogen monitoring system and the chemical and biochemical oxygen demand monitoring system, and simultaneously the microprocessor determines whether to start a nutrient source input pump in the nutrient source supplementing system and a sewage pump in the sewage system according to the obtained data.
The nutrient source supplementing system is composed of a nutrient solution storage tank, a nutrient solution input pump and a nutrient solution transmission pipe, wherein the nutrient solution storage tank and the nutrient solution input pump are arranged beside the culture pond, the nutrient solution transmission pipe connects the nutrient solution storage tank and the nutrient solution input pump, and the other end of the nutrient solution transmission pipe penetrates through a bottom center circular hole of the culture pond and the immobilized filler porous carrier and is opened in a water body.
The nutrient source input pump adopts a water pump controlled by an electromagnetic valve.
The nutrient solution storage tank is internally provided with a prepared nutrient solution, and the nutrient solution is formed by mixing a carbon source, a nitrogen source and a phosphorus source. The nutrient solution comprises the following components in percentage by mass: 10-15: 1-2.
The ammonia nitrogen and nitrite nitrogen monitoring system is composed of an ammonia nitrogen concentration sensor and a nitrite nitrogen concentration sensor, wherein the sensors are positioned in a water body on the inner side wall of the culture pond and connected with the microprocessor through signal transmission wires, and the concentration data are sent to the microprocessor in real time.
The chemical and biochemical oxygen demand monitoring system consists of Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD) sensors, wherein the COD sensors and the Biochemical Oxygen Demand (BOD) sensors are positioned in the water body on the inner side wall of the culture pond and are connected with the microprocessor through signal transmission wires, and the COD and BOD data are sent to the microprocessor in real time.
The oxygenation system consists of an air pump and an air pipe, the air pump is connected with the microprocessor, and the air outlet end of the air pipe is arranged in the culture pond.
The air pump is an electromagnetic air pump.
The self-cleaning system is formed by sequentially connecting an immobilized filler porous carrier, a sewage discharge pipe and a sewage discharge pump.
The immobilized filler porous carrier is formed by pressing and firing volcanic rock or zeolite materials, is hollow, adsorbs active microorganisms of algae fungi in an immobilized manner on the surface and in micropores, and is placed in a water body.
The sewage pump is arranged beside the culture pond; the water inlet end of the sewage discharge pipe penetrates through a circular hole in the center of the bottom surface of the culture pond, and the opening is formed in the hollow interior of the immobilized filler porous carrier; the water outlet end of the sewage discharge pipe is arranged outside the culture pond, and the sewage discharge pump is electrically connected with and controlled by the microprocessor.
The sewage pump is a sludge pump.
The active microorganism of the phycomycetes is compounded by bacillus, nitrobacteria, denitrifying bacteria, photosynthetic bacteria, chlorella, scenedesmus and spirulina. The immobilized filler adsorbs microorganisms in the filler by various forces including van der waals force, hydrogen bond, covalent bond, and ionic bond between the living body and the carrier, and acts in a sustained manner.
The active microorganisms of the phycomycetes are compounded according to the mass percentage: 3-5% of bacillus, 1-5% of nitrobacteria, 3-5% of denitrifying bacteria, 5-10% of photosynthetic bacteria, 15-20% of chlorella, 10-20% of scenedesmus, 15-20% of spirulina and the balance of clear water.
When the microprocessor judges that the BOD value is larger than 15mg/l, the microprocessor sends an instruction, the air pump is started, air is blown into the water body through the air delivery pipe, and the dissolved oxygen of the water body is improved.
When the microprocessor judges that the COD value is more than 20mg/l, the microprocessor sends an instruction, the sewage discharge pump is started, a small amount of precipitated microorganism phycomycete flocs, residues and part of wastewater rich in organic matters at the water inlet end of the sewage discharge pipe are pumped out, and the COD value in the water body is reduced.
When the ammonia nitrogen concentration value is more than or equal to 0.04 mg/L or the nitrite nitrogen concentration value is more than or equal to 0.02 mg/L, the microprocessor sends an instruction, the nutrient solution input pump is started, and nutrient solution is input into the water body through the nutrient solution input pipe, so that the content of the nutrient solution in the water body is improved.
Use an utilize immobilization microorganism water automatically cleaning scale aquaculture controlling means for the automatically cleaning of aquaculture process quality of water, use it to include following step:
(1) the microprocessor and the sewage pump are powered on, and the ammonia nitrogen concentration sensor, the nitrite nitrogen concentration sensor and the nutrient source input pump are powered on to enter a working state;
(2) after the culture pond is filled with water, adding nutrient solution into the water around the immobilized filler porous carrier through a nutrient solution infusion pump to form an active microorganism culture medium for the algae; the adding amount of the nutrient solution is 2-5% of the volume of the water body of the culture pond;
(3) after the oxygenation system stops working and stands for 30 minutes, a sewage discharge pump is manually started, a small amount of deposited microorganism phycomycete flocs and residues in the culture pond are pumped out of the culture pond, and an equivalent water source is supplemented, so that the water body and the microorganism biomass in the culture pond are maintained in dynamic balance;
(4) when the microprocessor receives data that the content of ammonia nitrogen is more than or equal to 0.04 mg/L and the content of nitrite nitrogen is more than or equal to 0.02 mg/L in the culture process, the microprocessor sends a command for supplementing a nutrient source to a nutrient source input pump, the nutrient source input pump is started to add the nutrient source into the water body, the adding amount of the nutrient source is 2-3% of the volume of the water body self-cleaning aquaculture pond, the time interval from each start to the next start is 6 hours, and the microprocessor sends a command for stopping the operation of the nutrient source input pump until the content of ammonia nitrogen in a culture area is less than 0.04 mg/L and the content of nitrite nitrogen is less than 0.02 mg/L;
(5) when the microprocessor receives a BOD value in the water body which is more than 15mg/l in the culture process, the microprocessor sends an instruction of supplementing oxygen, the air pump is started, air is blown into the water body through the air delivery pipe, and the dissolved oxygen of the water body is improved;
(6) when the microprocessor receives that the COD value is more than 20mg/L in the culture process, the microprocessor firstly sends an instruction to a nutrient source input pump in the self-cleaning system, the nutrient source input pump starts to add a nutrient source into the water body, the adding amount of the nutrient source is 2-3% of the volume of the water body self-cleaning aquaculture pond, the interval is 10 minutes after the addition is finished, the microprocessor sends an instruction to a sewage pump in the sewage system, the sewage pump starts, a small amount of deposited microorganism phycomycete flocs, residues and part of wastewater rich in organic matters at the water inlet end of the sewage system are pumped out, and the COD value in the water body is reduced.
The active microorganisms of the algae adsorbed by the immobilized filler are cultured in advance, wherein the bacillus, the nitrobacteria, the denitrifying bacteria and the photosynthetic bacteria are cultured in L B culture medium, the chlorella and the scenedesmus are cultured in BG11 culture medium, the spirulina is cultured in Zarrouk culture medium, the water temperature is controlled to be 25-30 ℃, the oxygen content is 1.5-2 mg/l, and the bacteria and the algae are matched according to the proportion of 1: 10-15 before adsorption to form mixed microorganism liquid.
Preparing immobilized biological filler with adsorbed microorganism, selecting specific surface area greater than 2000m2/m3The materials such as zeolite, volcanic materials and the like are used as fillers, the contact area between microorganisms and the materials is enlarged, the fillers can be firstly acidified by 5% lactic acid solution, so that the van der Waals force and ionic bonds between the fillers and the microorganisms are enhanced, the adsorption efficiency is improved, the materials are shaped and then placed in the mixed microbial liquid for 12 hours, the fillers are soaked in 1.5-2% sodium alginate solution after adsorption is completed, calcium chloride solution is added to form embedding on the surface, the fixing effect is enhanced, and finally the materials are transferred to a culture device for use.
Adopt foretell technical scheme, the beneficial effects of the utility model are that: the ammonia nitrogen and nitrite nitrogen sensors and the COD and BOD concentration sensors arranged in the culture pond effectively monitor the water quality condition in the culture water body in real time. In addition, the material of the immobilized filler has the capability of reducing the ammonia nitrogen concentration in the water body, and the activated microorganisms for adsorbing the algae can be repeatedly used for many times after being cleaned.
Drawings
FIG. 1 is a distribution diagram of the self-cleaning large-scale cultivation control device for the immobilized microorganism water body of the utility model;
FIG. 2 is a schematic diagram of the control process of the self-cleaning large-scale cultivation control system for the immobilized microorganism water body of the present invention;
FIG. 3 is a schematic view of the control principle of the self-cleaning large-scale cultivation control device for the immobilized microorganism water body of the present invention;
FIG. 4 is a top view of a culture pond supported by the self-cleaning large-scale culture control system for the immobilized microorganism water body.
Detailed Description
For a better understanding of the present invention, the present invention will be further explained by way of examples with reference to the accompanying drawings.
In fig. 1, 1 is a large-scale culture pond; 2 is a culture water body; 3, firing the volcanic rock to form an immobilized filler porous carrier; 4 is a nutrient solution infusion tube; 5 is a nutrient solution storage pool; 6 air pump of oxygenation system; 7 is a sewage discharge pipe of the self-cleaning system; 8 is a slope surface with the bottom of the culture pond inclined; 9 is a nutrient infusion pump; 10 is a sewage pump of the self-cleaning system; 11 is ammonia nitrogen concentration sensor; 12 is a nitrite nitrogen concentration sensor; 13 is a COD concentration sensor; 14 is a BOD concentration sensor.
In fig. 2, the microprocessor is connected with a nutrient source supplementing system, a self-cleaning system, an oxygenation system, an ammonia nitrogen and nitrite nitrogen monitoring system and a chemical and biochemical oxygen demand monitoring system respectively.
In fig. 3, the microprocessor receives data detected by the ammonia nitrogen concentration sensor (11), the nitrite nitrogen concentration sensor (12), the COD concentration sensor (13) and the BOD concentration sensor (14), determines whether the data exceeds a predetermined value, and determines whether to issue an operation command after the determination.
In fig. 4, 1 is a large-scale culture pond; 3, firing the volcanic rock to form an immobilized filler porous carrier; 4 is a nutrient solution infusion tube; 6 is a gas pipe of the oxygenation system; 8 is a slope surface with the bottom of the culture pond inclined.
Example 1
1. Structure of large-scale aquaculture control system
The large-scale culture control system consists of a microprocessor, an oxygenation system, a nutrient source supplementing system, a self-cleaning system, an ammonia nitrogen and nitrite nitrogen monitoring system, a chemical and biochemical oxygen demand monitoring system and a controller. The culture pond is of a square pond body structure, the self-cleaning system is located at the bottom of the system, the oxygenation system is fixed at the periphery of the system, air is conveyed into a water body (2) of the culture pond (1) through a gas conveying pipe (6) of the oxygenation system, and the self-cleaning system water quality monitoring and sensing system is fixed on the left inner side wall of the culture pond.
The large-scale culture pond (1) is made of cement bricks, has a cuboid pond-shaped structure with the specification of 12M × 8M × 3M, is divided into three areas by an inclined slope surface at the bottom of the pond, and is provided with 3 sets of volcanic rocks which are fired to form an immobilized filler porous carrier (3), 3 sets of nutrient solution input pipes (4) and 2 sets of gas conveying pipes of an oxygenation system.
The immobilized filler porous carrier (3) in the self-cleaning system is formed by firing volcanic rocks and is in an elongated annular shape. The immobilized filler porous carrier (3) is of a hollow cylindrical structure with the height of 1m, the outer diameter of 0.5m and the thickness of 0.3m, is provided with sparse gaps, has an irregular bottom surface, and is arranged in the culture pond (1) to leave empty gaps, thereby being beneficial to extracting microbial algal bacteria flocs and residues.
2. Preparation of nutrient solution
Respectively taking a bag of weighed nutrient solution containing a carbon source (bag A), a nitrogen source (bag B) and a phosphorus source (bag C), mixing the nutrient solution and the nutrient solution in a nutrient solution storage pool (6), and adding 2t of clear water. The carbon source (bag A), the nitrogen source (bag B) and the phosphorus source (bag C) are prepared by mixing the following carbon source, nitrogen source and phosphorus source according to the mass ratio of 100: 10: 1, was weighed and prepackaged, with a total mass of 25 kg.
3. Applications of
(1) The power supply to the control system comprises an ammonia nitrogen concentration sensor (11), a nitrite nitrogen concentration sensor (12), a COD concentration sensor (13) and BOD5The concentration sensor (14) and the nutrient solution infusion pump (9) enter working states;
(2) after the culture pond (1) is filled with water, the microprocessor firstly pumps the water into the water body (2) around the immobilized filler porous carrier (3) through a nutrient solution input pump (9) to form a phycomycete culture medium; the adding amount of the nutrient solution is 3-5% of the water volume of the self-cleaning large-scale cultivation control system of the water body (2), and the nutrient solution is automatically controlled by the microprocessor;
(3) after the oxygenation system is closed and stands for 30 minutes, the microprocessor starts a sewage discharge pump (10), a small amount of deposited microorganism phycomycete flocs and residues in the culture area are conveyed out of the culture system, and an equivalent water source is supplemented, so that the water body (2) and the microorganism amount in the culture system are maintained in dynamic balance;
(4) when the microprocessor receives data that the content of ammonia nitrogen is more than or equal to 0.04 mg/L and the content of nitrite nitrogen is more than or equal to 0.02 mg/L in the culture process, the microprocessor sends a command of supplementing a nutrient source to a nutrient source input pump (8), the nutrient source input pump (9) is started to add the nutrient source into the water body (2), the adding amount of the nutrient source is 2-3% of the volume of the water body (2) of the self-cleaning aquaculture pond, the time interval from each start to the next start is 6 hours, and the microprocessor sends a command of stopping the operation of the nutrient source input pump (9) until the content of ammonia nitrogen in the aquaculture pond is less than 0.04 mg/L or the content of nitrite nitrogen is less than 0.02 mg/L;
(5) when the microprocessor receives data that the oxygen content in the water body (2) is lower than or equal to the range of 1.5 to 2mg/l or the BOD value reaches more than 15mg/l in the culture process, the microprocessor sends an instruction of supplementing oxygen, the air pump (6) is started, air is blown into the water body through the air delivery pipe, and the dissolved oxygen of the water body is improved;
(6) when the microprocessor receives data that the COD concentration content is higher than or equal to 20mg/L in the culture process, the microprocessor firstly sends an instruction to a nutrient source input pump (9) in the self-cleaning system, the nutrient source input pump (9) is started to add a nutrient source into a water body, the adding amount of the nutrient source is 2-3% of the volume of the water body self-cleaning aquaculture pond, after the addition is finished, the interval is 10 minutes, the microprocessor then sends an instruction to a sewage pump (10) in the sewage system, the sewage pump (10) is started, a small amount of precipitated microorganism phycomycete floc, residues and part of wastewater rich in organic matters are pumped out of the culture system through a sewage pipe, and the COD value in the water body is reduced, the process is carried out in a circulating mode, and the interval is 6 hours every time until the COD value.
While particular embodiments of the present invention have been described, it will be understood by those skilled in the art that this is by way of example only, including the particular dimensions of the habitat and the like, and that various changes or modifications may be made to this embodiment by those skilled in the art without departing from the principles and spirit of the invention, and such changes and modifications are intended to be within the scope of the invention.
Claims (7)
1. A self-cleaning large-scale aquaculture control device utilizing immobilized water-purifying microorganisms is characterized in that the large-scale aquaculture control device is composed of a microprocessor, a nutrient source supplementing system, a self-cleaning system, an oxygenation system, an ammonia nitrogen and nitrite nitrogen monitoring system, a chemical and biochemical oxygen demand monitoring system and a controller; the microprocessor internally comprises a memory and an analog-to-digital converter, or the memory and the analog-to-digital converter are expanded outside the microprocessor according to requirements; the microprocessor is respectively connected with the nutrient source supplementing system, the self-cleaning system, the ammonia nitrogen and nitrite nitrogen monitoring system and the chemical and biochemical oxygen demand monitoring system, the controller receives ammonia nitrogen concentration, nitrite nitrogen concentration, BOD (biochemical oxygen demand) and COD (chemical oxygen demand) data monitored by the ammonia nitrogen and nitrite nitrogen monitoring system and the chemical and biochemical oxygen demand monitoring system, and simultaneously the microprocessor determines whether to start a nutrient source input pump in the nutrient source supplementing system and a sewage pump in the sewage system according to the obtained data.
2. The device for controlling aquaculture in large scale according to claim 1, wherein the nutrient source supplementing system comprises a nutrient solution storage tank, a nutrient solution input pump and a nutrient solution transmission pipe, the nutrient solution storage tank and the nutrient solution input pump are arranged beside the culture pond, the nutrient solution transmission pipe connects the nutrient solution storage tank and the nutrient solution input pump, and the other end of the nutrient solution transmission pipe passes through a bottom central circular hole of the culture pond and the porous carrier of the immobilized filler and is opened in the water body.
3. The device for controlling aquaculture in scale by self-cleaning of immobilized water-purifying microorganisms in water body according to claim 2, wherein the nutrient source input pump is a water pump controlled by an electromagnetic valve.
4. The device for controlling the large-scale aquaculture by utilizing the self-cleaning of the water body of the immobilized water-purifying microorganisms as claimed in claim 1, wherein the ammonia nitrogen and nitrite nitrogen monitoring system is composed of an ammonia nitrogen concentration sensor and a nitrite nitrogen concentration sensor, the sensors are positioned in the water body on the inner side wall of the culture pond and connected with the microprocessor through signal transmission wires, and the sensors send concentration data to the microprocessor in real time.
5. The device for self-cleaning large-scale aquaculture control by utilizing immobilized water-purifying microorganisms as claimed in claim 1, wherein the chemical and biochemical oxygen demand monitoring system comprises Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD) sensors, the Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD) sensors are positioned in the water body on the inner side wall of the culture pond and are connected with the microprocessor through signal transmission wires, and the COD and BOD data are sent to the microprocessor in real time.
6. The device for controlling aquaculture in scale in self-cleaning manner by utilizing immobilized water-purifying microorganisms as claimed in claim 1, wherein the oxygenation system comprises an air pump and an air pipe, the air pump is connected with the microprocessor, and the air outlet end of the air pipe is arranged in the culture pond; the air pump is an electromagnetic air pump.
7. The device for controlling the large-scale aquaculture by utilizing the self-cleaning of the water body of the immobilized water-purifying microorganisms as claimed in claim 1, wherein the self-cleaning system is formed by sequentially connecting an immobilized filler porous carrier, a sewage discharge pipe and a sewage discharge pump; the immobilized filler porous carrier is formed by pressing and firing volcanic rock or zeolite material, is hollow, adsorbs water purifying active microorganisms in an immobilized manner on the surface and in micropores, and is placed in a water body; the sewage pump is arranged beside the culture pond; the water inlet end of the sewage discharge pipe penetrates through a circular hole in the center of the bottom surface of the culture pond, and the opening is formed in the hollow interior of the immobilized filler porous carrier; the water outlet end of the sewage discharge pipe is arranged outside the culture pond, and the sewage discharge pump is electrically connected with and controlled by the microprocessor; the sewage pump is a sludge pump.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110734144A (en) * | 2019-10-29 | 2020-01-31 | 福建师范大学 | self-cleaning large-scale cultivation control system utilizing immobilized microorganism water body |
| CN116216874A (en) * | 2023-03-23 | 2023-06-06 | 重庆大学 | Water body restoration agent for controlling cyanobacteria bloom, preparation method and application |
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2019
- 2019-10-29 CN CN201921830652.2U patent/CN211078607U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110734144A (en) * | 2019-10-29 | 2020-01-31 | 福建师范大学 | self-cleaning large-scale cultivation control system utilizing immobilized microorganism water body |
| CN116216874A (en) * | 2023-03-23 | 2023-06-06 | 重庆大学 | Water body restoration agent for controlling cyanobacteria bloom, preparation method and application |
| CN116216874B (en) * | 2023-03-23 | 2024-04-30 | 重庆大学 | Water body restoration agent for controlling cyanobacteria bloom, preparation method and application |
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Effective date of registration: 20230512 Address after: Room 304-2, Floor 3, South Building, Medical Technology Building, No. 26-1, Wulongjiang South Avenue, Nanyu Town, Minhou County, Fuzhou City, Fujian Province, 350109 Patentee after: Fuzhou Wenze Biotechnology Co.,Ltd. Address before: 350108 science and technology office, Fujian Normal University, Minhou Town, Minhou Town, Fujian Patentee before: Fujian Normal University |