CN113620516B - Purifying farmland water-returning treatment device - Google Patents

Purifying farmland water-returning treatment device Download PDF

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Publication number
CN113620516B
CN113620516B CN202110886283.4A CN202110886283A CN113620516B CN 113620516 B CN113620516 B CN 113620516B CN 202110886283 A CN202110886283 A CN 202110886283A CN 113620516 B CN113620516 B CN 113620516B
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water
reaction tank
microalgae
fiber membrane
biological reaction
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CN113620516A (en
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崔益斌
陈捷
丁程成
钱进
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Hohai University HHU
Nanjing Institute of Environmental Sciences MEE
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Hohai University HHU
Nanjing Institute of Environmental Sciences MEE
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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
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/009—Apparatus with independent power supply, e.g. solar cells, windpower, fuel cells
    • 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
    • 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

Abstract

The invention relates to the field of environmental water treatment protection, and provides a treatment device for purifying farmland water withdrawal, which comprises a regulating tank, a filter tank and a microalgae biological reaction tank which are sequentially connected, wherein farmland water withdrawal firstly enters the regulating tank, then is lifted by a water suction pump and enters the filter tank, filter tank filler mainly consists of active carbon and zeolite, most of toxicity of pesticides in farmland water withdrawal is removed, and then the filtered water enters the microalgae biological reaction tank, and nitrogen and phosphorus in water are removed by absorption of chlorella. The invention effectively avoids the defect of low treatment effect of farmland water-withdrawal COD low-activity sludge method and biomembrane method.

Description

Purifying farmland water-returning treatment device
Technical Field
The invention belongs to the technical field of environmental water treatment protection, and particularly relates to a treatment device for purifying farmland water withdrawal.
Background
The farmland water-withdrawal surface source pollution has replaced point source pollution to become the most important source of river water environmental pollution in irrigation areas, the carried pollutant has complex components, various pollution output ways and serious threat to river water health.
The current centralized farmland water-removing treatment process mainly comprises activated sludge, artificial wetland and other processes, but because of the characteristics of high nitrogen and phosphorus content and poor biodegradability of farmland water-removing, the process needs enough carbon sources to normally operate, so that in the farmland water-removing treatment process, enough carbon sources are also added simultaneously to maintain the normal operation of the whole process flow, such as a carbon-supplementing type farmland drainage ditch tail water high-efficiency denitrification ecological purification tank with the patent publication number of CN110482700A, and a carbon source release tank is additionally arranged in a normal aerobic and anaerobic tank, and certain denitrification efficiency is ensured through the release of the carbon sources. However, this not only increases the floor space of the treatment facility, but also increases the loss of economic benefits due to carbon source addition, and the process does not take into consideration the damage of microorganisms treating sewage caused by the toxicity of the residual pesticide in the farmland wastewater.
Disclosure of Invention
The invention provides a treatment device for purifying farmland water, which aims to overcome the defects in the prior art, has more remarkable denitrification effect on farmland water, and has the advantages of simple structure, convenient use, easy production, installation and upgrading replacement.
The invention realizes the above purpose through the following technical scheme:
a treatment device for purifying farmland water withdrawal, comprising:
the regulating tank is used for buffering the inflow amount of the farmland water return;
the filter tank is used for filtering impurities in farmland water which is buffered by the regulating tank and absorbing and removing toxicity of pesticide residues in farmland water;
and a microalgae biological reaction tank for removing nitrogen and phosphorus in farmland water which is treated by the filter tank, wherein:
the microalgae biological reaction tank is internally provided with a hollow fiber membrane for separating microalgae from farmland water which is removed with nitrogen and phosphorus, and the hollow fiber membrane is rotated to separate the microalgae from the hollow fiber membrane.
As a further optimization scheme of the invention, the regulating tank, the filtering tank and the microalgae biological reaction tank are connected in sequence;
the farmland water return enters the regulating tank through the water inlet pipe, and the buffered farmland water return is output to the filtering tank through the water outlet pump and the water outlet pipeline;
the farmland water which is treated by the filter tank flows into the microalgae biological reaction tank through a water inlet on one side wall of the microalgae biological reaction tank;
the microalgae biological reaction tank discharges farmland water which is removed with nitrogen and phosphorus in the hollow fiber membrane to the outside of the device through a second water outlet pipeline and a second water outlet pump.
As a further optimization scheme of the invention, the water inlet pipe is provided with a valve, so that sequencing batch water inlet is realized.
As a further optimization scheme of the invention, the filter tank comprises a filter tank body, and a partition wall, a zeolite layer and an active carbon layer which are arranged in the tank body, wherein the zeolite layer is arranged at the bottom of the filter tank body, the partition wall is arranged in the middle of the upper part of the filter tank body, the partition wall is fixedly connected with the filter tank body, and the active carbon layer is distributed in the filter tank body at two sides of the partition wall, and the bottom of the active carbon layer is communicated with the zeolite layer; and farmland water which is buffered by the regulating tank flows through the active carbon layer and the zeolite layer from top to bottom, then flows into the active carbon layer by the zeolite layer and finally enters the microalgae biological reaction tank.
As a further optimization scheme of the invention, the hollow fiber membrane is arranged in a cylinder shape, the top end and the bottom end of the hollow fiber membrane are connected with a rotating device, and the hollow fiber membrane is driven to rotate when farmland water which is removed of nitrogen and phosphorus is discharged from the microalgae biological reaction tank.
As a further optimization scheme of the invention, the rotating device comprises a hollow tube, a rotating shaft and a bearing;
the top end of the hollow fiber membrane is connected with the top of the inner cavity of the microalgae biological reaction tank through a hollow tube and a bearing, the hollow tube is communicated with the inner cavity of the hollow fiber membrane, the bottom end of the hollow fiber membrane is connected with the bottom of the inner cavity of the microalgae biological reaction tank through a rotating shaft and the bearing, the bearing at the top end of the hollow tube is connected with a second water outlet pipeline through a flange, and under the action of the second water outlet pump, the hollow tube extracts farmland water which is subjected to solid-liquid separation and nitrogen and phosphorus removal in the hollow fiber membrane and is discharged out of the microalgae biological reaction tank through the second water outlet pipeline;
the bottom end of the hollow tube extends to the inner cavity of the hollow fiber membrane and is inclined, and inclined force is generated in the hollow fiber membrane when the inclined hollow tube extracts farmland tail water, and the hollow fiber membrane is driven to rotate under the action of the inclined force.
As a further optimization scheme of the invention, the microalgae biological reaction tank comprises a reaction tank body and microalgae arranged in the reaction tank body, wherein the microalgae is chlorella cultured by adopting BG11 culture solution and inoculated in the reaction tank body.
As a further optimization scheme of the invention, the microalgae biological reaction tank further comprises an aeration pipe, an air pump and an air outlet pipe, wherein the aeration pipe is arranged on the front side wall and the rear side wall of the bottom of the tank body of the reaction tank and is connected with the air pump, the air outlet pipe is arranged at the top of the tank body of the reaction tank, the aeration head on the aeration pipe adopts a microporous aeration head, the aperture is smaller than the minimum particle size of the chlorella, the chlorella is prevented from blocking the aeration head, and the air pump supplies carbon dioxide into the microalgae biological reaction tank through the aeration pipe and the aeration head for photosynthesis of the chlorella.
As a further optimization scheme of the invention, the microalgae biological reaction tank also comprises fluorescent lamps, wherein the fluorescent lamps are arranged on two side walls of the inner cavity of the reaction tank body and are used for enhancing the early-stage viability of the chlorella.
As a further optimized scheme of the invention, the processing device further comprises a solar panel, wherein the solar panel is connected with the storage battery through a solar controller and is used for converting solar energy into electric energy to be stored in the storage battery for power consumption of the fluorescent lamp and the air pump.
The invention has the beneficial effects that:
1) The invention is provided with the filter tank, the filler is activated carbon and zeolite, and the treated water body can remove the toxicity of pesticide residues in the water through the adsorption of the activated carbon, the zeolite and the activated carbon, so as to avoid the damage to microorganisms, bacteria and the like in the biological reaction tank;
2) The invention finally removes nitrogen and phosphorus in the treated water body by utilizing the absorption effect of microalgae, thereby avoiding the condition of low treatment effect of farmland water withdrawal caused by insufficient carbon source and poor biodegradability;
3) The microalgae is adopted as a single chlorella species, so that the method has higher economic value, has wide commercial prospect in biodiesel and medicine health care, can bring certain economic benefit to the harvesting of the chlorella at the later stage, and reduces the operation and maintenance cost of the device;
4) According to the invention, the hollow fiber membrane is arranged in the biological reaction tank, so that solid-liquid separation of microalgae and the treated water body is realized, sufficient microalgae concentration in the reaction tank is ensured, and the rotating devices are arranged at the two ends of the hollow fiber membrane, so that the microalgae are prevented from being attached to the membrane, and the operation of the system is further influenced;
5) The solar panel is arranged, so that power support is provided for partial equipment in the device, and the overall energy consumption cost of the equipment is reduced;
6) The water inlet mode is sequencing batch water inlet, so that the residence time of the treated water body is ensured, and the treatment effect of the final water outlet quality is further ensured.
Drawings
FIG. 1 is a top view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a schematic cross-sectional view of a turning apparatus according to the present invention;
in the figure: 1. an adjusting tank; 11. a water inlet pipe; 12. a first water outlet pump; 13. a first water outlet pipeline; 2. a filtering tank; 21. a partition wall; 22. a zeolite layer; 23. an activated carbon layer; 3. a microalgae biological reaction tank; 31. a hollow fiber membrane; 32. a second water outlet pipeline; 33. a second water outlet pump; 34. an aeration pipe; 35. an air pump; 36. an air outlet pipe; 37. a fluorescent lamp; 4. a rotating device; 41. a hollow tube; 42. a rotating shaft; 43. a bearing; 5. a solar cell panel.
Detailed Description
The following detailed description of the present application is provided in conjunction with the accompanying drawings, and it is to be understood that the following detailed description is merely illustrative of the application and is not to be construed as limiting the scope of the application, since numerous insubstantial modifications and adaptations of the application will be to those skilled in the art in light of the foregoing disclosure.
Example 1
As shown in figures 1-3, the treatment device for purifying farmland water withdrawal comprises a regulating tank 1, a filtering tank 2 and a microalgae biological reaction tank 3 which are sequentially connected, wherein the whole device can be composed of reinforced concrete, and the material selection is convenient and easy to obtain and is easy to combine with an ecological ditch.
The regulating tank 1 is used for buffering the inflow of farmland water withdrawal; be provided with inlet tube 11, a water pump 12 and a water outlet pipe way 13 in equalizing basin 1, farmland water withdrawal gets into equalizing basin 1 through inlet tube 11, and the farmland water withdrawal after the buffering promotes to filtering ponds 2 through a water pump 12 and a water outlet pipe way 13, and the setting of a water pump 12 can give moisturizing at regular time and quantity under central control system's control, and is provided with the valve on inlet tube 11, realizes the sequencing batch formula and intakes, guarantees filtering filler, microalgae in filtering ponds 2, microalgae biological reaction pond 3 and water have sufficient contact time.
The filter tank 2 is used for filtering impurities in farmland water which is buffered by the regulating tank 1, absorbing and removing toxicity of pesticide residues in the farmland water which is treated by the filter tank 2, and flowing the farmland water which is treated by the filter tank 2 into the microalgae biological reaction tank 3 through a water inlet on one side wall of the microalgae biological reaction tank 3;
the filter tank 2 comprises a filter tank body, a partition wall 21, a zeolite layer 22 and an active carbon layer 23, wherein the partition wall 21, the zeolite layer 22 and the active carbon layer 23 are arranged in the tank body, the zeolite layer 22 is arranged at the bottom of the filter tank body, the partition wall 21 is arranged in the middle of the upper part of the filter tank body, the partition wall 21 is fixedly connected with the filter tank body, and the active carbon layer 23 is distributed in the filter tank body at two sides of the partition wall 21, and the bottom of the active carbon layer is communicated with the zeolite layer 22; the farmland water which is buffered by the regulating tank 1 flows through the active carbon layer 23 and the zeolite layer 22 from top to bottom, then flows into the active carbon layer 23 from the zeolite layer 22, finally enters the microalgae biological reaction tank 3, and the filler is active carbon and zeolite, so that the adsorption filter tank 2 not only filters impurities in water, but also can adsorb and remove most of pesticide residue toxicity, and the influence of the residue toxicity on the subsequent microalgae growth is avoided.
The microalgae biological reaction tank 3 comprises a reaction tank body and microalgae arranged in the reaction tank body, wherein the microalgae is chlorella cultured to 100mg/L by adopting BG11 culture solution and inoculated in the reaction tank body, the chlorella has higher economic value, has wide commercial prospect in biodiesel and medicine health care, can bring certain economic benefit to the harvesting of the chlorella in the later period, and reduces the operation and maintenance cost of the device; through the absorption effect of microalgae, the microalgae remove nitrogen and phosphorus in farmland water after being treated by the filter tank 2, and the microalgae biological reaction tank 3 discharges the farmland water after removing nitrogen and phosphorus in the hollow fiber membrane 31 to the outside of the device through a second water outlet pipeline 32 and a second water outlet pump 33; wherein:
the microalgae biological reaction tank 3 is internally provided with a hollow fiber membrane 31 for separating microalgae from farmland water which is removed with nitrogen and phosphorus, and the hollow fiber membrane 31 ensures a certain microalgae concentration in the reaction tank body, so that the treatment effect can be ensured; rotating the hollow fiber membrane 31 to separate microalgae from the hollow fiber membrane 31, thereby avoiding attachment of microalgae to the hollow fiber membrane 31;
the hollow fiber membrane 31 is arranged in a cylinder shape, the top end and the bottom end of the hollow fiber membrane are connected with the rotating device 4, when the farmland water which is removed with nitrogen and phosphorus is discharged from the microalgae biological reaction tank 3, the hollow fiber membrane 31 is driven to rotate, and the rotating device 4 comprises a hollow tube 41, a rotating shaft 42 and a bearing 43;
the top end of the hollow fiber membrane 31 is connected with the top of the inner cavity of the microalgae biological reaction tank 3 through a hollow tube 41 and a bearing 43, the hollow tube 41 is communicated with the inner cavity of the hollow fiber membrane 31, the bottom end of the hollow fiber membrane 31 is connected with the bottom of the inner cavity of the microalgae biological reaction tank 3 through a rotating shaft 42 and the bearing 43, and the bearing 43 at the top end of the hollow tube 41 is connected with the second water outlet pipeline 32 through a flange; the bottom end of the hollow tube 41 extends to the inner cavity of the hollow fiber membrane 31 and is inclined, when the inclined hollow tube 41 extracts farmland tail water, an inclined force is generated in the hollow fiber membrane 31, and the hollow fiber membrane 31 is driven to rotate under the action of the inclined force.
Under the action of the second water outlet pump 33, the hollow tube 41 extracts the farmland water which is subjected to solid-liquid separation and nitrogen and phosphorus removal in the hollow fiber membrane 31, and is discharged out of the microalgae biological reaction tank 3 through the second water outlet pipeline 32, meanwhile, as the bottom end of the hollow tube 41 extends to the inner cavity of the hollow fiber membrane 31 and is inclined, when the hollow tube is used for extracting water, an inclined force is generated in the hollow fiber membrane 31, namely, when external water enters the hollow fiber membrane 31, the force generated by uneven distribution can drive the hollow fiber membrane 31 to slightly rotate under the action of the inclined force, the top end of the hollow tube 41 is connected with the bearing 43 and communicated with the inner cavity of the bearing 43, and the second water outlet pipeline is connected with the bearing 43 through a flange and communicated with the inner cavity of the bearing 43, so that the hollow tube 41 rotates and the extraction of the water in the hollow fiber membrane 31 is not influenced, and microalgae in the water are filtered by the hollow fiber membrane 31, and the microalgae concentration is ensured;
in addition, a gear set can be further arranged outside the hollow tube 41, the gear set comprises two gears meshed with each other, one gear is fixed on the outer wall of the hollow tube 41, the other gear is in transmission connection with the motor output shaft, and the hollow fiber membrane 31 can be controlled to rotate by electric power.
The microalgae biological reaction tank 3 further comprises an aeration pipe 34, an air pump 35 and an air outlet pipe 36, wherein the aeration pipe 34 is arranged on the front side wall and the rear side wall of the bottom of the inner cavity of the reaction tank body and is connected with the air pump 35, the air outlet pipe 36 is arranged at the top of the reaction tank body, the aeration head on the aeration pipe 34 is a microporous aeration head, the aperture of the aeration head is smaller than the minimum particle size of the chlorella, the chlorella is prevented from blocking the aeration head, and the air pump 35 supplies carbon dioxide into the microalgae biological reaction tank 3 through the aeration pipe 34 and the aeration head so as to enable the chlorella to carry out photosynthesis.
The microalgae biological reaction tank 3 further comprises fluorescent lamps 37, wherein the fluorescent lamps 37 are arranged on two side walls of the inner cavity of the reaction tank body and are used for enhancing the early-stage viability of the chlorella.
The processing device further comprises a solar panel 5, wherein the solar panel 5 is connected with a storage battery through a solar controller and is used for converting solar energy into electric energy to be stored in the storage battery for power consumption of the fluorescent lamp 37 and the air pump 35, so that the overall energy consumption cost of the equipment is reduced.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.

Claims (7)

1. A treatment device for purifying farmland water, comprising:
the regulating tank (1) is used for buffering the inflow of farmland water withdrawal;
the filter tank (2) is used for filtering impurities in farmland water return buffered by the regulating tank (1) and absorbing and removing toxicity of pesticide residues in the farmland water return;
a microalgae biological reaction tank (3) for removing nitrogen and phosphorus in farmland wastewater treated by the filter tank (2), wherein:
a hollow fiber membrane (31) for separating microalgae from farmland water which is removed with nitrogen and phosphorus is arranged in the microalgae biological reaction tank (3), and the hollow fiber membrane (31) is rotated to separate the microalgae from the hollow fiber membrane (31);
the regulating tank (1), the filtering tank (2) and the microalgae biological reaction tank (3) are connected in sequence;
a water inlet pipe (11), a water outlet pump (12) and a water outlet pipeline (13) are arranged in the regulating tank (1), farmland water which is drained enters the regulating tank (1) through the water inlet pipe (11), and the buffered farmland water which is drained is output to the filter tank (2) through the water outlet pump (12) and the water outlet pipeline (13);
the farmland water which is treated by the filter tank (2) flows into the microalgae biological reaction tank (3) through a water inlet on one side wall of the microalgae biological reaction tank (3);
the microalgae biological reaction tank (3) discharges farmland water which is removed with nitrogen and phosphorus in the hollow fiber membrane (31) to the outside of the device through a second water outlet pipeline (32) and a second water outlet pump (33);
the hollow fiber membrane (31) is arranged in a cylinder shape, the top end and the bottom end of the hollow fiber membrane are connected with the rotating device (4), and when the farmland water return after nitrogen and phosphorus removal is discharged from the microalgae biological reaction tank (3), the hollow fiber membrane (31) is driven to rotate;
the rotating device (4) comprises a hollow tube (41), a rotating shaft (42) and a bearing (43);
the top end of the hollow fiber membrane (31) is connected with the top of the inner cavity of the microalgae biological reaction tank (3) through a hollow tube (41) and a bearing (43), the hollow tube (41) is communicated with the inner cavity of the hollow fiber membrane (31), the bottom end of the hollow fiber membrane (31) is connected with the bottom of the inner cavity of the microalgae biological reaction tank (3) through a rotating shaft (42) and the bearing (43), and the bearing (43) at the top end of the hollow tube (41) is connected with a second water outlet pipeline (32) through a flange;
the bottom end of the hollow tube (41) extends to the inner cavity of the hollow fiber membrane (31) and is inclined, and when the inclined hollow tube (41) extracts farmland tail water, an inclined force is generated in the hollow fiber membrane (31) and drives the hollow fiber membrane (31) to rotate under the action of the inclined force.
2. The apparatus for purifying farmland water according to claim 1, wherein: the water inlet pipe (11) is provided with a valve to realize sequencing batch water inlet.
3. The apparatus for purifying farmland water according to claim 1, wherein: the filter tank (2) comprises a filter tank body, and a partition wall (21), a zeolite layer (22) and an active carbon layer (23) which are arranged in the tank body, wherein the zeolite layer (22) is arranged at the bottom of the filter tank body, the partition wall (21) is arranged in the middle of the upper part of the filter tank body, the partition wall (21) is fixedly connected with the filter tank body, and the active carbon layer (23) is distributed in the filter tank body at two sides of the partition wall (21) and the bottom of the partition wall is communicated with the zeolite layer (22); the farmland water which is buffered by the regulating tank (1) flows through the active carbon layer (23) and the zeolite layer (22) from top to bottom, then flows into the active carbon layer (23) from the zeolite layer (22), and finally enters the microalgae biological reaction tank (3).
4. The apparatus for purifying farmland water according to claim 1, wherein: the microalgae biological reaction tank (3) comprises a reaction tank body and microalgae arranged in the reaction tank body, wherein the microalgae is chlorella.
5. The apparatus for purifying farmland water according to claim 4, wherein: the microalgae biological reaction tank (3) further comprises an aeration pipe (34), an air pump (35) and an air outlet pipe (36), wherein the aeration pipe (34) is arranged on the front side wall and the rear side wall of the bottom of the inner cavity of the reaction tank and is connected with the air pump (35), the air outlet pipe (36) is arranged at the top of the reaction tank body, the aeration head on the aeration pipe (34) adopts a microporous aeration head, the aperture is smaller than the minimum particle size of the chlorella, and the air pump (35) supplies carbon dioxide into the microalgae biological reaction tank (3) through the aeration pipe (34) and the aeration head so as to carry out photosynthesis on the chlorella.
6. The apparatus for purifying farmland water according to claim 5, wherein: the microalgae biological reaction tank (3) further comprises fluorescent lamps (37), wherein the fluorescent lamps (37) are arranged on two side walls of the inner cavity of the reaction tank body and are used for enhancing the early survival ability of the chlorella.
7. The apparatus for purifying farmland water according to claim 6, wherein: the processing device further comprises a solar panel (5), wherein the solar panel (5) is connected with a storage battery through a solar controller and used for converting solar energy into electric energy to be stored in the storage battery for power consumption of the fluorescent lamp (37) and the air pump (35).
CN202110886283.4A 2021-08-03 2021-08-03 Purifying farmland water-returning treatment device Active CN113620516B (en)

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CN114775506A (en) * 2022-01-27 2022-07-22 华能西藏雅鲁藏布江水电开发投资有限公司 Farmland water return circulation system based on ridge transformation

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CN102336498B (en) * 2011-06-28 2013-03-13 蔡志武 Nitrogen-phosphorus wastewater treating method by sequencing batch reactor coupled photobioreactor
CN104560637A (en) * 2015-01-06 2015-04-29 南昌大学 Rotatable film-forming type microalgae photosynthetic reactor
CN112295406A (en) * 2020-10-22 2021-02-02 海瑞膜科技南通有限公司 Hollow fiber ultrafiltration membrane filter
CN112830641A (en) * 2021-03-10 2021-05-25 同济大学 High-density microalgae biofilm reactor based on membrane aeration and membrane concentration and algae culture method thereof

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