CN114620835B - Nitrogen and phosphorus capturing device and method for sewage treatment - Google Patents
Nitrogen and phosphorus capturing device and method for sewage treatment Download PDFInfo
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- CN114620835B CN114620835B CN202210206534.4A CN202210206534A CN114620835B CN 114620835 B CN114620835 B CN 114620835B CN 202210206534 A CN202210206534 A CN 202210206534A CN 114620835 B CN114620835 B CN 114620835B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/322—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention relates to a nitrogen and phosphorus capturing device and a nitrogen and phosphorus capturing method for sewage treatment, wherein the nitrogen and phosphorus capturing device comprises a sedimentation tank and at least one microalgae treatment tank, and the microalgae treatment tank comprises a transparent tank body, a plurality of layers of microalgae treatment net disks arranged in the transparent tank body, a material conveying pipeline connected with the plurality of layers of microalgae treatment net disks and an inflatable air bag arranged at the edge of the microalgae treatment net disks; the nitrogen and phosphorus capture method comprises the following steps: the material conveying pipeline conveys air and microalgae to a position between the multilayer microalgae treatment net disks to be mixed with the sewage supernatant, and the microalgae captures nitrogen and phosphorus in the sewage supernatant; opening a microalgae concentrated solution feeding channel when the microalgae grows to a certain cell concentration, and discharging the microalgae concentrated solution from a blow-off pipe; and repeating the steps on the blocking of the microalgae concentrated solution blanking channel. The invention utilizes the combination of the multilayer trumpet-shaped microalgae treatment net disc and the inflatable air bag, can realize the replacement of microalgae and the discharge of microalgae concentrated solution and impurities, and has simple and convenient operation.
Description
Technical Field
The invention belongs to the field of sewage treatment, and particularly relates to a nitrogen and phosphorus capturing device and method for sewage treatment.
Background
Nitrogen and phosphorus are important substances causing eutrophication of water bodies and environmental pollution. In China, nitrogen and phosphorus pollution becomes the primary index influencing the water environment quality of surface water. The biochemical sewage treatment technology is a main technology in sewage treatment, and plays an extremely important role in preventing water body pollution and improving water body functions as an economic and effective means.
In China, water resource shortage and water pollution become more and more serious, the problem of eutrophication caused by serious exceeding of nitrogen and phosphorus in main lakes is prominent, red tide phenomenon frequently occurs, water quality is deteriorated due to the eutrophication phenomenon of water bodies, production and life of people are seriously affected, nitrogen and phosphorus are important nutrient substances of water organisms, the problem of eutrophication of the water bodies is solved, and the nitrogen and phosphorus are removed from sewage.
Algae can effectively absorb nutrients such as nitrogen and phosphorus in a water body through photosynthesis, can effectively remove nitrogen and phosphorus while finishing the growth and metabolism of the algae, and in addition, microalgae has high oil content and high growth rate and is considered as a biodiesel raw material with the most development prospect.
However, when nitrogen and phosphorus are removed by using algae, microalgae needs to be replaced regularly to ensure the effect of removing nitrogen and phosphorus, and the existing treatment device, for example, a device for treating nitrogen and phosphorus-rich wastewater by using microalgae disclosed in patent publication No. CN111087126a, has a large difficulty in replacing microalgae and a difficulty in discharging the obtained microalgae concentrated solution, so that a nitrogen and phosphorus capture device and method for sewage treatment, which are more convenient to use, are urgently needed to be designed.
Disclosure of Invention
The invention aims to solve the problems and provide a nitrogen and phosphorus capture device and method for sewage treatment.
The invention achieves the above purpose through the following technical scheme:
a nitrogen and phosphorus capture device for sewage treatment comprises a sedimentation tank and at least one microalgae treatment tank, wherein the microalgae treatment tank comprises:
the bottom of the transparent tank body is provided with a sewage inlet pipe and a sewage discharge pipe, the top of the transparent tank body is provided with a water outlet pipe, and the sewage inlet pipe is connected with the supernatant output end of the sedimentation tank;
the microalgae treatment net plates are arranged in the transparent tank body, microalgae are filled among the microalgae treatment net plates, each microalgae treatment net plate is arranged in a horn shape, a horn mouth of each microalgae treatment net plate is arranged downwards, and a microalgae concentrated solution blanking channel is formed between each microalgae treatment net plate and the transparent tank body;
the material conveying pipeline is connected with the multiple layers of microalgae treatment net disks, and the surface of the material conveying pipeline is provided with an air jet port which is used for supplying air and microalgae between the multiple layers of microalgae treatment net disks;
and the inflatable air bag is arranged at the edge of the microalgae treatment net disc and is used for plugging the microalgae concentrated solution blanking channel in an inflated state.
The whole device utilizes the microalgae to capture nitrogen and phosphorus in the sewage, and the sewage is used for culturing the microalgae, so that the win-win situation can be realized. When microalgae is replaced, the horn-shaped microalgae treatment net disc, the inflatable air bag and the material conveying pipeline for supplying air and microalgae are arranged, so that the microalgae concentrated solution and impurities can be discharged, the microalgae can be replaced, and sewage can be treated intermittently. The device has simple structure, convenient microalgae replacement and high nitrogen and phosphorus capture efficiency in sewage.
As a further optimization scheme of the invention, the microalgae treatment net disk comprises an upper layer of net plate and a lower layer of net plate and a membrane assembly arranged between the two layers of net plates, wherein the upper layer of net plate and the lower layer of net plate are connected in a clamping manner and are detachably connected with a material conveying pipeline through screws. Through set up the membrane module in little algae processing net dish intermediate layer, can filter the impurity in the sewage, also be used for spacing little algae, the mesh diameter of otter board can set up to be less than little algae diameter, and little algae processing net dish sets up to loudspeaker form, and its horn mouth sets up down, also can avoid membrane module and otter board to block up.
As a further optimization scheme of the invention, the inflatable airbag is fixedly embedded at the edge of the bottom of the microalgae treatment net disk, and the gas delivery pipe of the inflatable airbag penetrates through the material delivery pipe and is connected with an external inflation and deflation dual-purpose pump.
As a further optimization scheme of the invention, the air nozzles on the material conveying pipeline are uniformly distributed along the annular side wall of the material conveying pipeline, the air nozzles are arranged close to the microalgae treatment net disk, the top end of the material conveying pipeline is connected with the aeration device through a first pipeline, and the top end of the material conveying pipeline is connected with the microalgae storage tank through a second pipeline. Air and microalgae are conveyed to the space between the multiple layers of microalgae treatment net disks through the material conveying pipeline, so that the feeding is convenient; and the evenly distributed of air jet, it is even to distribute when can making air and little algae feeding, and the air jet is close to little algae processing net dish in addition and sets up, can sweep upper and lower floor's otter board to prevent that the otter board from blockking up, can also blow away little the grease membrane that algae formed, make sewage can upwards spread, realize multistage nitrogen phosphorus and catch, sewage treatment is more high-efficient, also forms flowing water, avoids the firm attached tank inner wall of grease to form thick layer grease.
As a further optimized scheme of the invention, the microalgae treatment tank further comprises a lifting mechanism, and the lifting mechanism is used for driving the multilayer microalgae treatment net disk and the material conveying pipeline to move inside and outside the transparent tank body. The lifting mechanism can be arranged to conveniently clean or replace the microalgae treatment net disk.
As a further optimization scheme of the invention, the lifting mechanism comprises a linear guide rail and an L-shaped support fixedly connected with a nut on the linear guide rail, and the top end of the L-shaped support is fixedly connected with the material conveying pipeline. This kind of elevating system's setting can reduce whole elevating gear at the ascending occupation space of vertical side, and when material pipeline and multilayer little algae were handled the net dish and are in transparent jar internally, whole elevating system's high slightly was greater than whole device height, compares and directly sets up like cylinder or pneumatic cylinder at the device top, and this elevating system saves space more.
As a further optimization scheme of the invention, a sealing cover is fixedly arranged at the top of the microalgae treatment tank, an air outlet is formed in the sealing cover and used for exhausting air and the like to ensure that the pressure in the transparent tank body is normal, and the material conveying pipeline is fixedly connected with the sealing cover and the top end of the material conveying pipeline penetrates through the sealing cover. When elevating system drove material pipeline and shifts up, can drive sealed lid and shift up to this can expose the little algae material pipeline who handles net dish of multilayer and below, conveniently clears up both, and sealed lid need not other operations and dismantles, and it is more convenient to use.
The method for capturing nitrogen and phosphorus by adopting the nitrogen and phosphorus capturing device for sewage treatment comprises the following steps:
s1, extracting the supernatant of the sewage in the sedimentation tank into a microalgae treatment tank through a sewage inlet pipe, conveying air and microalgae to a plurality of layers of microalgae treatment net trays through a material conveying pipeline to be mixed with the sewage, and capturing nitrogen and phosphorus in the supernatant of the sewage by the microalgae;
s2, when the microalgae grow to a certain cell concentration, releasing gas in the inflatable air bag to open a microalgae concentrated solution blanking channel, and allowing the microalgae concentrated solution to flow downwards to the bottom of the transparent tank along the inner wall of the transparent tank and be discharged from a sewage discharge pipe;
and S3, after the microalgae concentrated solution is discharged, inflating the inflatable air bag to block the microalgae concentrated solution blanking channel, and repeating the steps S1 to S3 to realize intermittent nitrogen and phosphorus capture of the sewage.
The invention has the beneficial effects that:
1) According to the invention, the multilayer horn-shaped microalgae treatment net discs and the inflatable air bags are combined for use, and the material conveying pipeline is used for conveying air and microalgae to the multilayer microalgae treatment net discs, so that the microalgae can be replaced, and microalgae concentrated solution and impurities can be discharged, the operation is simple and convenient, and the intermittent nitrogen and phosphorus capture of sewage can be easily realized;
2) According to the invention, the material conveying pipeline is utilized, so that not only can the conveying of air and microalgae be realized, but also the microalgae treatment net disc can be cleaned by blowing, the blocking of the net plate and the membrane assembly can be prevented, and the oil film formed by the microalgae can be blown away, so that sewage can be spread upwards, multi-stage nitrogen and phosphorus capture is realized, the sewage treatment is more efficient, and the oil is prevented from being attached to the inner wall of the tank body;
3) The invention can clean or replace the material conveying pipeline and the multilayer microalgae treatment net disc in the transparent tank body by utilizing the lifting mechanism, and the lifting mechanism does not occupy too much space, thereby being very convenient to use.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic sectional view of a microalgae treatment tank according to the present invention.
FIG. 3 is a schematic sectional view of the multi-layered microalgae treatment net disk of the present invention removed from the microalgae treatment tank.
FIG. 4 is a schematic diagram of a microalgae treatment net disk structure of the invention.
FIG. 5 is a schematic cross-sectional view of a microalgae-processing net disk according to the present invention.
In the figure: 1. a transparent tank body; 11. a sewage inlet pipe; 12. a sewage discharge pipe; 13. a water outlet pipe; 2. a microalgae treatment net disc; 21. a screen plate; 22. a membrane module; 3. a material conveying pipeline; 31. an air jet; 4. an inflatable air bag; 5. a microalgae concentrated solution blanking channel; 6. a dual-purpose pump for inflation and deflation; 7. an aeration device; 8. a microalgae storage tank; 9. a lifting mechanism; 91. a linear guide rail; 92. a nut; 93. an L-shaped bracket; 10. and (7) sealing the cover.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention; in the description of the present invention, the meaning of "plurality" or "a plurality" is two or more unless otherwise specified.
Example 1
As shown in fig. 1 to 5, a nitrogen and phosphorus capturing device for sewage treatment comprises a sedimentation tank and at least one microalgae treatment tank, wherein the microalgae treatment tank comprises:
the bottom of the transparent tank body 1 is provided with a sewage inlet pipe 11 and a sewage discharge pipe 12, the top of the transparent tank body is provided with a water outlet pipe 13, and the sewage inlet pipe 11 is connected with the supernatant output end of the sedimentation tank;
the microalgae treatment net discs are arranged in the transparent tank body 1, microalgae are filled between the microalgae treatment net discs 2, each layer of microalgae treatment net disc 2 is in a horn shape, a horn mouth of each layer of microalgae treatment net disc is arranged downwards, and a microalgae concentrated solution blanking channel 5 is formed between each layer of microalgae treatment net disc 2 and the transparent tank body 1;
the material conveying pipeline 3 is connected with the multilayer microalgae treatment net disks 2, the surface of the material conveying pipeline 3 is provided with an air jet 31, and the air jet 31 is used for supplying air and microalgae between the multilayer microalgae treatment net disks 2; the top end of the material conveying pipeline 3 is connected with an aeration device 7 through a first pipeline, and the top end of the material conveying pipeline 3 is connected with a pump body through a second pipeline and a microalgae storage tank 8;
the inflatable air bag 4 is arranged at the edge of the microalgae treatment net disc 2, and the inflatable air bag 4 in an inflated state is used for plugging the microalgae concentrated solution blanking channel 5; the inflatable air bag 4 is fixedly embedded at the bottom edge of the microalgae treatment net disk 2, and an air delivery pipe of the inflatable air bag penetrates through the material delivery pipeline 3 and is connected with an external inflation and deflation dual-purpose pump 6.
The method for capturing nitrogen and phosphorus by adopting the nitrogen and phosphorus capturing device for sewage treatment comprises the following steps:
s1, extracting supernatant of sewage in a sedimentation tank into a microalgae treatment tank through a sewage inlet pipe 11, starting a pump body connected with an aeration device 7 and a microalgae storage tank 8, so that air and microalgae are conveyed to a plurality of layers of microalgae treatment net discs 2 through a material conveying pipeline 3 to be mixed with the sewage, and capturing nitrogen and phosphorus in the supernatant of the sewage by the microalgae;
s2, when the microalgae grow to a certain cell concentration, starting the gas charging and discharging dual-purpose pump 6, pumping gas in the gas charging air bag 4 to open a microalgae concentrated solution blanking channel 5, and discharging the microalgae concentrated solution from a discharge pipe 12 along the inner wall of the transparent tank body 1 to the bottom of the transparent tank body 1;
and S3, after the microalgae concentrated solution is discharged, starting the charging and discharging dual-purpose pump 6, charging the charging air bag 4 to plug the microalgae concentrated solution blanking channel 5, and repeating the steps S1-S3 to realize intermittent nitrogen and phosphorus capture of the sewage.
The whole device utilizes the microalgae and the transparent tank body 1 to be matched for use, sewage is treated, the microalgae can fix and absorb nitrogen and phosphorus in the sewage, the sewage can culture the growth of the microalgae, and when the microalgae grows to a certain degree, the microalgae can be harvested for other applications, so that a win-win situation is realized;
the whole device is sealed between the multilayer microalgae treatment net disc 2 and the transparent tank body 1 through the inflatable air bag 4, so that the multilayer distribution of microalgae is realized, the multistage capture of nitrogen and phosphorus in sewage is realized, in the process, impurities in the sewage, precipitation of microalgae concentrated solution and the like can be accumulated on the edge of the horn-shaped microalgae treatment net disc 2, the upward movement of the sewage below and the contact of the microalgae floating on the lower surface of the upper layer microalgae treatment net disc 2 are not influenced, and the influence of the sewage impurities on the nitrogen and phosphorus capture efficiency in the microalgae treatment process is overcome;
when microalgae is collected, gas in the inflatable airbag 4 is released, a microalgae concentrated solution discharging channel 5 between the multilayer microalgae treatment net disk 2 and the transparent tank body 1 is opened, at the moment, microalgae concentrated solution, impurities accumulated on the edge of the microalgae treatment net disk 2 and the like can flow downwards along the horn-shaped inclined curved surface and flow downwards along the inner wall of the transparent tank body 1, and the microalgae concentrated solution can be discharged by opening the discharge pipe 12;
after the sewage is discharged, the inflatable air bag 4 is inflated, so that the microalgae concentrated solution blanking channel 5 is closed, the sewage inlet pipe 11 is used for continuously extracting the supernatant in the sedimentation tank into the microalgae treatment tank, the sewage treated at the upper part is discharged from the water outlet pipe 13, and then the microalgae and air are supplied between the multi-layer microalgae treatment net discs 2 through the material conveying pipeline 3, so that the intermittent sewage treatment is realized.
In order to intercept impurities in sewage and limit microalgae, the microalgae treatment net disc 2 is composed of an upper layer of net plate 21 and a lower layer of net plate 21, and a membrane assembly 22 arranged between the two layers of net plates 21. Wherein the membrane module 22 is a microfiltration membrane, can filter impurities in sewage, and also intercepts microalgae in a space between two adjacent layers of microalgae treatment net discs 2, and sewage impurities can be accumulated at the edge of the horn-shaped microalgae treatment net discs 2, when new sewage enters the transparent tank body 1 from the bottom, the membrane module 22 is arranged to reduce the influence of the entering pressure on the sewage treated above, and in addition, the influence of the entering sewage on the sewage treated at the upper layer can be reduced by arranging the height of the transparent tank body 1.
The upper and lower layers of screen plates 21 are connected in a clamping manner and detachably connected with the material conveying pipeline 3 through screws, the upper and lower layers of screen plates are specifically connected with each other through insertion rods and through holes in a clamping manner, and the screws penetrate through the insertion rods and are connected with the material conveying pipeline 3, specifically shown in fig. 5.
For making air and little algae distribution even and evenly sweep about to otter board 21, will jet port 31 on the material conveying pipeline 3 sets up to the annular lateral wall evenly distributed along material conveying pipeline 3, and jet port 31 is close to little algae processing net dish 2 and sets up, and the evenly distributed of jet port 31 can make air and little algae evenly distributed, and jet port 31 is close to little algae processing net dish 2 and sets up in addition, can sweep upper and lower floor's otter board 21 to prevent that otter board 21 from blockking up. In addition, the air jet port 31 can be arranged to be inclined away from the material conveying pipeline 3, namely, the air and microalgae blowing-out path is inclined away from the diameter of the material conveying pipeline 3, so that the air and microalgae blowing-out path can form a cyclone shape, the range of stirring the microalgae and obliquely blowing the net plate 21 is wider, and the influence on impurities accumulated on the edge of the microalgae processing net plate 2 can also be reduced.
In order to enable the multilayer microalgae treatment net disk 2 and the material conveying pipeline 3 to be easily cleaned or replaced, the microalgae treatment tank is further provided with a lifting mechanism 9, and the lifting mechanism 9 is used for driving the multilayer microalgae treatment net disk 2 and the material conveying pipeline 3 to move inside and outside the transparent tank body 1.
Further, the lifting mechanism 9 comprises a linear guide rail 91 and an L-shaped support 93 fixedly connected with a nut 92 on the linear guide rail 91, and the top end of the L-shaped support 93 is fixedly connected with the material conveying pipeline 3.
When the device is used, the linear guide rail 91 is started, and the nut 92 on the linear guide rail can drive the material conveying pipeline 3 and the multilayer microalgae treatment net disk 2 to move up and down through the L-shaped bracket 93, so that the material conveying pipeline 3 and the microalgae treatment net disk 2 can be cleaned or replaced;
and this kind of elevating system 9's setting can reduce the ascending occupation space of whole elevating gear in vertical direction, and when material pipeline 3 and multilayer little algae processing net dish 2 were in transparent jar body 1, whole elevating system 9's height slightly was greater than whole device height, compares and directly sets up like cylinder or pneumatic cylinder at the device top, and this elevating system 9 saves space more.
In order to facilitate sewage treatment, a sealing cover 10 is fixedly arranged at the top of the microalgae treatment tank, and an exhaust port is formed in the sealing cover 10 and used for exhausting air and the like, so that the pressure inside the transparent tank body 1 is normal. In addition, in order to conveniently clear up or change material conveying pipeline 3 and multilayer little algae processing net dish 2, material conveying pipeline 3 runs through sealed lid 10 with sealed 10 fixed connection and top, when elevating system 9 drove material conveying pipeline 3 and moves up, can drive sealed lid 10 and move up to this can expose multilayer little algae processing net dish 2 and the material conveying pipeline 3 of below, conveniently clears up both, sealed lid 10 need not other operations and dismantles, and it is more convenient to use.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (6)
1. The utility model provides a nitrogen phosphorus capture device for sewage treatment, includes sedimentation tank and at least one little algae processing jar, its characterized in that: the microalgae treatment tank comprises:
the bottom of the transparent tank body (1) is provided with a sewage inlet pipe (11) and a sewage discharge pipe (12), the top of the transparent tank body is provided with a water outlet pipe (13), and the sewage inlet pipe (11) is connected with the supernatant output end of the sedimentation tank;
the microalgae treatment net plates (2) are arranged in the transparent tank body (1), microalgae are filled between the microalgae treatment net plates (2), each layer of microalgae treatment net plate (2) is arranged in a horn shape, a horn mouth of each layer of microalgae treatment net plate is arranged downwards, and a microalgae concentrated solution blanking channel (5) is formed between each layer of microalgae treatment net plate (2) and the transparent tank body (1);
the material conveying pipeline (3) is connected with the multiple layers of microalgae treatment net disks (2), the surface of the material conveying pipeline (3) is provided with an air jet (31), and the air jet (31) is used for supplying air and microalgae between the multiple layers of microalgae treatment net disks (2);
the inflatable air bag (4) is arranged at the edge of the microalgae treatment net disc (2), and the inflatable air bag (4) in an inflated state is used for plugging the microalgae concentrated solution blanking channel (5); the inflatable air bag (4) is fixedly embedded at the bottom edge of the microalgae treatment net disc (2), and an air delivery pipe of the inflatable air bag penetrates through the material delivery pipeline (3) and is connected with an external inflation and deflation dual-purpose pump (6);
air jet (31) on material pipeline (3) are along the annular lateral wall evenly distributed of material pipeline (3), and air jet (31) are close to little algae processing net dish (2) and set up, material pipeline (3) top is connected with aeration equipment (7) through a pipeline, material pipeline (3) top is connected with fill and fill dual-purpose pump of gassing (6) and little algae storage tank (8) respectively through No. two pipelines.
2. The nitrogen and phosphorus capturing device for sewage treatment according to claim 1, wherein: the microalgae treating net disc (2) is composed of an upper layer of net plate (21) and a lower layer of net plate (21) and a film assembly (22) arranged between the two layers of net plates (21), and the upper layer of net plate (21) and the lower layer of net plate (21) are connected in a clamping mode and detachably connected with the material conveying pipeline (3) through screws.
3. The nitrogen and phosphorus capturing device for sewage treatment according to claim 1, wherein: the microalgae treatment tank further comprises a lifting mechanism (9), wherein the lifting mechanism (9) is used for driving the multilayer microalgae treatment net disc (2) and the material conveying pipeline (3) to move inside and outside the transparent tank body (1).
4. The nitrogen and phosphorus capturing device for sewage treatment according to claim 3, characterized in that: the lifting mechanism (9) comprises a linear guide rail (91) and an L-shaped support (93) fixedly connected with a nut (92) on the linear guide rail (91), and the top end of the L-shaped support (93) is fixedly connected with the material conveying pipeline (3).
5. The nitrogen and phosphorus capturing device for sewage treatment according to claim 1, wherein: the microalgae treatment tank is characterized in that a sealing cover (10) is fixedly arranged at the top of the microalgae treatment tank, an exhaust port is formed in the sealing cover (10), and the material conveying pipeline (3) is fixedly connected with the sealing cover (10) and the top end of the material conveying pipeline penetrates through the sealing cover (10).
6. The nitrogen and phosphorus capture method of the nitrogen and phosphorus capture device for sewage treatment according to any one of claims 1-5, characterized by comprising the following steps:
s1, extracting supernatant of sewage in a sedimentation tank into a microalgae treatment tank through a sewage inlet pipe (11), conveying air and microalgae to a plurality of layers of microalgae treatment net discs (2) through a material conveying pipeline (3) to be mixed with the sewage, and capturing nitrogen and phosphorus in the supernatant of the sewage by the microalgae;
s2, when the microalgae grow to a certain cell concentration, releasing gas in the inflatable air bag (4) to open a microalgae concentrated solution blanking channel (5), and allowing the microalgae concentrated solution to flow downwards to the bottom of the transparent tank body (1) along the inner wall of the transparent tank body (1) and be discharged from a drain pipe (12);
and S3, after the microalgae concentrated solution is discharged, inflating the inflatable air bag (4) to block the microalgae concentrated solution feeding channel (5), and repeating the steps S1-S3 to realize intermittent nitrogen and phosphorus capture of the sewage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210206534.4A CN114620835B (en) | 2022-03-03 | 2022-03-03 | Nitrogen and phosphorus capturing device and method for sewage treatment |
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| CN202210206534.4A CN114620835B (en) | 2022-03-03 | 2022-03-03 | Nitrogen and phosphorus capturing device and method for sewage treatment |
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| CN114620835A CN114620835A (en) | 2022-06-14 |
| CN114620835B true CN114620835B (en) | 2023-03-31 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111087126B (en) * | 2019-12-17 | 2022-06-07 | 安徽大学 | Device for treating nitrogen and phosphorus-rich wastewater by using microalgae |
| CN111747607B (en) * | 2020-06-10 | 2022-07-05 | 张家港市金帆环保科技有限公司 | Waste water treatment device |
| CN112919641B (en) * | 2021-03-23 | 2024-01-16 | 南京科盛环保技术有限公司 | Method and treatment device for denitrification and dephosphorization by utilizing microalgae |
| CN215828577U (en) * | 2021-08-18 | 2022-02-15 | 南京艺诺特环保科技有限公司 | Tubular membrane aeration membrane bioreactor based on nuclear pore membrane |
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| CN114620835A (en) | 2022-06-14 |
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