CN213623716U - Ecological clean system of tail water breeds - Google Patents
Ecological clean system of tail water breeds Download PDFInfo
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- CN213623716U CN213623716U CN202021202275.0U CN202021202275U CN213623716U CN 213623716 U CN213623716 U CN 213623716U CN 202021202275 U CN202021202275 U CN 202021202275U CN 213623716 U CN213623716 U CN 213623716U
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Abstract
An ecological purification system for aquaculture tail water adopts a fish-vegetable symbiotic technology to decompose ammonia nitrogen in the aquaculture tail water into fertilizers which can be absorbed by plants in a tide filter bed, and simultaneously improves the oxygen content of a water body; the tail water rich in inorganic salt is absorbed and purified by plants in the tidal filter bed, the planting floating bed in the buffer pool and the artificial wetland and then is discharged to the natural environment, thereby solving the problems of recycling of the breeding tail water and the like. The device comprises a sedimentation tank, a brush cabin, a tide filtering bed, a buffer tank, an artificial wetland, a clean water tank, a separation wall, a lifting pump, a drainage pump, a reflux pump, a sludge pump, aquatic plants, aquatic animals and the like; the culture tail water is subjected to precipitation, suspended matter filtration, ammonia nitrogen and nitrite decomposition, particulate matter filtration and aquatic animal and aquatic plant purification, and then is used in the natural environment. The invention adopts the grading and layering multi-echelon to repeatedly filter, decompose and purify the culture tail water, and the system basically realizes zero pollution discharge of the culture tail water.
Description
Technical Field
The invention belongs to the field of fish and vegetable symbiosis application, and particularly relates to a culture tail water ecological purification system.
Background
With the rapid development of industrialization and urbanization, a large amount of pollutants are discharged to lakes and reservoirs, and meanwhile, lands suitable for planting vegetables and crops are gradually reduced. With the increasing water pollution and the gradual reduction of the land suitable for planting crops, how to break the contradiction between the cultivation wastewater and the water environment protection, the green cultivation and the high-quality planting development are urgently started. Therefore, the applicant has conducted beneficial research and research, and combined with the fish-vegetable symbiosis concept and technology, found a solution to the above problems, and the technical solutions to be described below were created in this context.
Disclosure of Invention
The invention aims to develop an ecological purification system for aquaculture tail water, which decomposes ammonia nitrogen in the aquaculture tail water into fertilizers capable of being absorbed by plants in a tide filter bed by adopting a fish-vegetable symbiotic technology and simultaneously improves the oxygen content of a water body; the tail water rich in inorganic salt is absorbed and purified by plants in the tidal filter bed, the planting floating bed in the buffer pool and the artificial wetland and then is discharged to the natural environment, thereby solving the problems of recycling of the breeding tail water and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
an ecological purification system for culture tail water comprises a sedimentation tank, a brush cabin, a tidal filter bed, a buffer tank, an artificial wetland, a clean water tank, an isolation wall, a lifting pump, a drainage pump, a reflux pump, a sludge pump, aquatic plants and aquatic animals;
an ecological purification system for culture tail water is arranged on the ground;
the ecological purification system for the culture tail water is characterized in that a sedimentation tank, a brush cabin, a fluidized bed biological reaction tank, a tide filtering bed, a buffer tank, an artificial wetland and a water cleaning tank are separated by partition walls of all parts;
in the environment that the concentration of organic matters in the culture tail water does not exceed the limit value, the culture tail water of an external sewage disposal ditch is led into a sedimentation tank through a lifting pump; the sedimentation tank is connected with the brush bin through a separation wall, and sewage in the sedimentation tank is precipitated and then is led into the brush bin through the separation wall between the sedimentation tank and the brush bin along a drain hole; the brush cabin is connected with the tide filtering bed through a separation wall, and sewage in the brush cabin is led into the tide filtering bed along a drain hole through the separation wall between the brush cabin and the tide filtering bed; the tide filtering bed is separated from the buffer tank by a separation wall, and sewage is filtered by the tide filtering bed and then is introduced into the buffer tank by a drainage pump; the buffer tank is connected with the artificial wetland through a partition wall, and sewage purified by the buffer tank is introduced into the artificial wetland along an overflow port through the partition wall between the buffer tank and the artificial wetland; the buffer tank is connected with the tidal filter bed through a reflux pump, and part of sewage purified by the buffer tank is introduced into the tidal filter bed for the second time through the reflux pump for filtering; the artificial wetland is connected with the water cleaning pool through a separation wall, and water purified by the artificial wetland is introduced into the water cleaning pool through the separation wall between the artificial wetland and the water cleaning pool; the clean water tank discharges water into an external river channel through an overflow port of the clean water tank;
the sedimentation tank is positioned at the front end of the ecological purification system of the culture tail water and is used for primary sedimentation of the culture tail water, and the culture tail water after sedimentation is introduced into the brush cabin through the partition wall along the drain hole;
the hairbrush is arranged in the hairbrush bin, the culture tail water flow is divided into a plurality of thin flows under the separation of hairbrush in the hairbrush bin, the water flows for a long time, suspended matters are gradually adsorbed on the hairbrush, and the filtered sewage is introduced into the tide filtering bed along the drain hole on the isolation wall;
the tidal filter bed is used for decomposing and filtering ammonia nitrogen and nitrite in input sewage, and the filtered sewage is introduced into the buffer tank from the tidal filter bed through the drainage pump;
the buffer tank is used for buffering and primary purification of filtered sewage, and the sewage after delayed purification is discharged to the artificial wetland through the overflow port; the buffer pool is provided with a reflux pump and is used for pumping part of filtered sewage stored in the buffer pool back to the tidal filter bed or the brush cabin through the reflux pump for secondary decomposition and filtration; the buffer pool is provided with filter-feeding aquatic animals and aquatic plants for purifying water;
the artificial wetland is a main purification area of the system, and aquatic plants and aquatic animals are placed in the artificial wetland and used for mixing and purifying the filtered and purified sewage again, and the purified water flows into the clean water tank;
the clean water pool is used for storing and using purified water, and the residual tail water is discharged to an external river channel through an overflow port of the clean water pool to be used in a natural environment;
the sludge pump is used for regularly pumping sludge generated in the sedimentation tank and the hairbrush tank to the tidal filter bed.
The culture tail water ecological purification system also comprises a fluidized bed biological reaction tank; when the concentration of organic matters in the culture tail water exceeds a limit value, the fluidized bed biological reaction tank is additionally arranged between the tide filtering bed and the brush cabin; the water treated by the brush cabin is introduced into the fluidized bed biological reaction tank between the fluidized bed biological reaction tank and the brush cabin through the partition wall;
the biological filler is placed in the fluidized bed biological reaction tank, the aeration disc is arranged at the bottom of the bed, and the biological filler is rolled into a fluidized state through aeration so as to complete the nitration reaction.
Breed ecological clean system of tail water, when breeding tail water organic matter concentration and surpassing the limit value, the backwash pump that sets up next door in the buffer pool draws back sewage and introduces the brush storehouse.
The tidal filter bed is divided into an upper river sand layer and a bottom stone layer; planting green vegetables with different roots on the river sand layer; the river sand layer consists of sand with the diameter of 0.5mm-1.5mm, the thickness of the river sand layer is 40CM, and the river sand layer is used for filtering small particles of foreign matters in input sewage; the stone layer consists of stones with different sizes and is used for filtering large particles in sewage; the river sand layer is used for filtering small particle foreign matters in the sewage;
the tide filtering bed adopts a sewage filtering mode that the sewage overflows upwards from the bottom of the bed, and a drainage pump is started to drain the water in the filtering bed after the water level reaches a set height.
Aquatic animals including one or more of spotted silver carp and river snail are placed in the buffer tank for water body purification;
the buffer pool adopts a floating bed mode to plant plants, and the plants comprise one or more of celery, cress, lettuce, pakchoi, spinach, leaf lettuce, cabbage, cauliflower, broccoli, crowndaisy chrysanthemum and water spinach.
Preferably, the aquatic plants planted in the artificial wetland comprise one or more of the watermifoil, the cress and the lotus seeds, and the aquatic plants absorb nutrient substances in the tail water to thoroughly purify the tail water;
preferably, the aquatic animals thrown into the artificial wetland comprise one or more of river snails, finless eels and loaches and are used for purifying the wetland water body.
The invention adopting the technical scheme has the following advantages:
(1) the invention utilizes common filter materials and realizes high-efficiency filtration and decomposition through ingenious design, thereby the scheme has low construction cost.
(2) The invention adopts an integrated engineering design, the lower earth volume is less, and the construction speed is high.
(3) The system equipment has low operation and maintenance cost.
(4) The invention adopts the fish-vegetable symbiotic technology, all organic matters in the culture tail water finally become organic fertilizers which are absorbed by plants in the system, and the organic fertilizers are carried away from water bodies, thereby realizing zero pollution and emission.
(5) The invention not only brings additional income to the farm, but also can produce high-quality agricultural products such as ecological organic vegetables, lotus seeds and the like.
(6) The invention adopts grading, layering and multi-echelon to repeatedly filter, decompose and purify the culture tail water, and the system basically realizes zero pollution discharge of the culture tail water; meanwhile, all organic matters in the tail water finally become organic fertilizers which are absorbed by plants in the system and are carried away from the water body; the tail water is discharged to the natural environment after meeting the discharge conditions.
(7) The system has long service life, and the river sand in the system can be used for a long time.
Drawings
FIG. 1 is a system block diagram of the present invention.
FIG. 2 is a system configuration diagram of the present invention when the organic concentration exceeds a limit.
Figure 3 is a block diagram of a tidal filtration bed of the present invention.
Description of the drawings: in fig. 1 and 2, 101 is a sedimentation tank, 102 is a brush cabin, 103 is a tidal filter bed, 104 is a buffer tank, 105 is an artificial wetland, 106 is a clean water tank, 107 is a drainage pump, 108 is a return pump, 109 is a lift pump, 110 is a fluidized bed biological reaction tank, 111 is a separation wall (1), 113 is a separation wall (2), 114 is a separation wall (3), 115 is a separation wall (4), 116 is a separation wall (5), 112 is a separation wall (6), 117 is an external sewage drainage ditch, and 118 is an external river ditch; in fig. 3, 201 is a green root vegetable, 202 is a river sand layer, 203 is a stone layer, and 204 is a partition wall.
Detailed Description
The following detailed description of embodiments of the invention is provided in connection with the accompanying drawings. The present invention is not limited to only these examples.
Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".
In the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1, the ecological purification system for the aquaculture tail water is arranged on the ground and comprises a sedimentation tank 101, a brush cabin 102, a tidal filter bed 103, a buffer tank 104, an artificial wetland 105, a water cleaning tank 106, a lift pump 109, a drainage pump 107, a reflux pump 108, a separation wall (1)111, a separation wall (2)113, a separation wall (3)114, a separation wall (4)115, a separation wall (5) 116, a sludge pump, aquatic plants and aquatic animals; wherein, the sedimentation tank 101, the brush cabin 102, the tidal filter bed 103, the buffer tank 104, the artificial wetland 105 and the clean water tank 106 are separated by the isolation enclosing walls of each part;
an ecological purification system for culture tail water is characterized in that culture tail water in an external sewage drainage ditch 117 is introduced into a sedimentation tank 101 through a lift pump 109; sewage in the sedimentation tank 101 is introduced into the brush cabin 102 through a drain hole on the upper edge of a separation wall (1)111 between the sedimentation tank 101 and the brush cabin 102; the sewage in the brush cabin 102 is led into the tidal filter bed 103 through a drain hole on the upper edge of a separation wall (2)113 between the brush cabin 102 and the tidal filter bed 103; the filtered sewage is introduced into the buffer tank 104 between the tidal filter bed 103 and the buffer tank 104 through a drainage pump 107, and the tidal filter bed 103 and the buffer tank 104 are separated through a separation wall (3) 114; the sewage purified by the buffer pool 104 is introduced into the buffer pool 105 between the buffer pool 104 and the buffer pool 105 through the partition wall (4)115 along the overflow port (1); the sewage purified by the buffer tank 104 is introduced into the tidal filtration bed 103 for the second time between the buffer tank 104 and the tidal filtration bed 103 through a reflux pump; the buffer pool 105 and the clean water pool 106 are respectively connected through the upper edge of the separation wall (5) to lead the water purified by the buffer pool 105 into the clean water pool 106; the clean water basin 106 discharges water into an external river channel through a clean water basin overflow port;
the working process of the ecological purification system of the culture tail water comprises the following steps: after the culture tail water is discharged to a sewage discharge ditch 117 from a culture workshop, an automatic lifting pump 109 is arranged beside the sewage discharge ditch, and when the sewage discharge amount reaches a set value, the lifting pump 109 works to pump and discharge the sewage to the sedimentation tank 101; the sewage enters a brush bin 102 after being primarily precipitated in a sedimentation tank 101, and a brush is arranged in the brush to filter suspended matters in the water; the tail water passing through the brush cabin 102 enters a tidal filter bed 103; most of the organic matter in the wastewater is decomposed by bacteria in the tidal filter bed 103; plants are planted on the tidal filter bed 103, nutrition supplementing plants in the sewage are absorbed, and relatively clean tail water is injected into the buffer tank 104 through the drainage pump 107; aquatic plants are planted in the buffer tank 104 to absorb and purify nutrient substances in the tail water; a reflux pump 108 is arranged in the buffer tank 104 and can pump water back to the filter bed for cyclic decomposition; an overflow port (1) is arranged at the water outlet end of the buffer pool 104, and tail water subjected to nitration decomposition is discharged to the artificial wetland 105 through the overflow port (1); the artificial wetland 105 is planted with watery plants such as watermifoil, cress, lotus seeds and the like, absorbs nutrient substances in the tail water, and thoroughly purifies the tail water; the purified water flows into a clean water tank 106, and the clean water tank 106 is provided with a clean water tank overflow port; the water in the clean water tank 106 can be used as circulating water, and the residual tail water is discharged to an external river channel through an overflow port of the clean water tank.
The hairbrush is arranged in the hairbrush bin, water flow is divided into a plurality of thin flows under the barrier of the hairbrush, and suspended matters are gradually adsorbed on the hairbrush after the water flows for a long time, so that the filtering effect is achieved; and the filtered sewage is sent into a tidal filter bed after secondary sedimentation.
As shown in fig. 1, a large amount of sludge is generated in the sedimentation tank 101 and the brush tank after the system is operated for a period of time, and the sludge in the sedimentation tank 101 and the brush tank is periodically pumped out to the tidal filtration bed 103 by a sludge pump manually.
As shown in fig. 2, when the organic matter concentration of the culture tail water exceeds the limit value, a fluidized bed biological reaction tank 110 is additionally arranged at the front end of the tidal filter bed 103; biological fillers are placed in the fluidized bed biological reaction tank 110, an aeration disc is arranged at the bottom of the bed, and the biological fillers are rolled into a fluidized state through aeration so as to complete the nitration reaction.
As shown in fig. 3, the tidal filtration bed 103 is used for decomposing ammonia nitrogen and nitrite in sewage; the tidal filter bed is divided into an upper river sand layer 202 and a bottom river sand layer 203; sewage entering the tidal filtration bed 103 is filtered by a river sand layer 203 and a sand river layer and then is discharged to the buffer tank 104 through the clean water tank 106; different rhizome green vegetables are planted on the river sand layer 202;
the river sand layer 202 adopts river sand as a filter medium; preferably, the layer of river sand 202 is 40CM thick; in order to meet the requirements of the tidal filter bed 103 on water permeability and filter effect, sand with the diameter of 0.5mm-1.5mm is selected; the river sand has the advantages of stable chemical performance, large specific surface area, easy acquisition, low cost and the like.
The tidal filter bed 103 adopts a tidal filtering mode, and the flow direction of sewage is repeatedly changed; the sewage overflows upwards from the bottom of the bed, the water cleaning pool 106 is started to discharge the water in the filter bed after the water level reaches a set height, and at the moment, the water flows upwards and downwards in the filter bed in a reverse direction to take away larger particles which are just intercepted; the particles adsorbed on the sand surface are quickly decomposed under the action of bacteria, so that the water permeability of river sand is ensured; in the tidal process, when water in the bed is emptied, air is sucked into the gaps of river sand to provide an oxygen-rich environment for bacteria and accelerate the process of nitrification and decomposition; due to the tidal mode, the pollutants are decomposed quickly and efficiently.
Vegetables are planted on the tidal filter bed 103 to absorb nutrient substances in water and purify water; tests prove that the vegetables planted on the sandy filter bed are not limited by the variety, and have high yield and good quality; meanwhile, due to the fact that planting varieties are various, the phosphorus and nitrogen removal effect in the tail water is superior to that of floating plate planting of single-planting leaf vegetables.
The buffer tank 104 is used for buffering and primary purification of filtered sewage, and the sewage after delayed purification is discharged to the artificial wetland 105 through an overflow port; the buffer tank 104 is provided with a return pump 108 and is used for pumping part of the filtered sewage stored in the buffer tank 104 back to the tidal filter bed 103 or the brush cabin 102 through the return pump 108 for secondary decomposition and filtration; the buffer pool 104 is provided with filter feeding aquatic animals and plants for water purification.
Preferably, the buffer tank 104 is used for placing one or more aquatic animals including spotted silver carp and river snail for water body purification;
the buffer pool 104 is used for planting plants in a floating bed mode, the plants can be planted all the year round, and the planted plants comprise one or more of green-leaf vegetables such as celery, cress, lettuce, pakchoi, spinach, leaf lettuce, cabbage, cauliflower, broccoli, crowndaisy chrysanthemum, water spinach and the like, and cabbage vegetables;
the artificial wetland 105 is a main purification area of the system, aquatic plants and aquatic animals are placed in the artificial wetland, and the artificial wetland is used for mixing and purifying the filtered and purified sewage again, and the purified water flows into the clean water tank 106;
preferably, the aquatic plants planted in the artificial wetland 105 comprise one or more of watermifoil, cress and lotus seeds, and the aquatic plants absorb nutrient substances in the tail water to thoroughly purify the tail water; the watermifoil is a perennial submerged plant, can quickly remove eutrophication elements such as nitrogen, phosphorus and the like in a water body, and is a plant for strongly purifying the water body; the Foliutailed algae can also be used as feed for fish, pig, duck, etc.; the calamus is a perennial herb, and the stems and leaves of the calamus can be used as a medicine and can also be used for disease control of the soft-shelled turtles;
preferably, the aquatic animals thrown into the artificial wetland 105 comprise one or more of river snails, finless eels and loaches and are used for purifying the wetland water body.
The clean water tank 106 is used for storing and using purified water, and the residual tail water is discharged to an external river channel through an overflow port;
as shown in FIG. 2, in the ecological purification system for aquaculture tail water, when the concentration of organic matters in aquaculture tail water exceeds a limit value, sewage in the buffer tank 104 is pumped back to the brush cabin 102 through the return pump 108.
The invention utilizes common filter materials and realizes high-efficiency filtration and decomposition through ingenious design, thereby the scheme has low construction cost.
The invention adopts an integrated engineering design, the lower earth volume is less, and the construction speed is high.
The system equipment has low operation and maintenance cost.
The invention adopts the fish-vegetable symbiotic technology, all organic matters in the culture tail water finally become organic fertilizers which are absorbed by plants in the system, and the organic fertilizers are carried away from water bodies, thereby realizing zero pollution and emission.
The invention not only brings additional income to the farm, but also can produce high-quality agricultural products such as ecological organic vegetables, lotus seeds and the like.
The invention adopts grading, layering and multi-echelon to repeatedly filter, decompose and purify the culture tail water, and the system basically realizes zero pollution discharge of the culture tail water; all organic matters in the tail water finally become organic fertilizers which are absorbed by plants in the system and are carried away from the water body; the tail water is discharged to the natural environment after meeting the discharge conditions.
The system has long service life, and the river sand in the system can be used for a long time.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An ecological purification system for culture tail water is characterized by comprising a sedimentation tank, a brush cabin, a tide filter bed, a buffer tank, an artificial wetland, a clean water tank, a separation wall, a lifting pump, a drainage pump, a reflux pump, a sludge pump, aquatic plants and aquatic animals; for the environment that the concentration of organic matters in the culture tail water exceeds the limit value, a fluidized bed biological reaction tank is additionally arranged at the front end of the tidal filter bed, and water treated by the brush cabin is introduced into the fluidized bed biological reaction tank between the fluidized bed biological reaction tank and the brush cabin through the edge of the isolation wall;
an ecological purification system for culture tail water is arranged on the ground;
the ecological purification system for the culture tail water is characterized in that a sedimentation tank, a brush cabin, a fluidized bed biological reaction tank, a tide filtering bed, a buffer tank, an artificial wetland and a water cleaning tank are separated by partition walls of all parts;
in the environment that the concentration of organic matters in the culture tail water does not exceed the limit value, the culture tail water of an external sewage disposal ditch is led into a sedimentation tank through a lifting pump; the sedimentation tank is connected with the brush bin through a separation wall, and sewage in the sedimentation tank is precipitated and then is led into the brush bin through the separation wall between the sedimentation tank and the brush bin along a drain hole; the brush cabin is connected with the tide filtering bed through a separation wall, and sewage in the brush cabin is led into the tide filtering bed along a drain hole through the separation wall between the brush cabin and the tide filtering bed; the tide filtering bed is separated from the buffer tank by a separation wall, and sewage is filtered by the tide filtering bed and then is introduced into the buffer tank by a drainage pump; the buffer tank is connected with the artificial wetland through a partition wall, and sewage purified by the buffer tank is introduced into the artificial wetland along an overflow port through the partition wall between the buffer tank and the artificial wetland; the buffer tank is connected with the tidal filter bed through a reflux pump, and part of sewage purified by the buffer tank is introduced into the tidal filter bed for the second time through the reflux pump for filtering; the artificial wetland is connected with the water cleaning pool through a separation wall, and water purified by the artificial wetland is introduced into the water cleaning pool through the separation wall between the artificial wetland and the water cleaning pool; the clean water tank discharges water into an external river channel through an overflow port of the clean water tank;
the sedimentation tank is positioned at the front end of the ecological purification system of the culture tail water and is used for primary sedimentation of the culture tail water, and the culture tail water after sedimentation is introduced into the brush cabin through the partition wall along the drain hole;
the hairbrush is placed in the hairbrush bin, the culture tail water flow is divided into a plurality of thin flows under the separation of the hairbrush, and the water flows for a long time, so that suspended matters are gradually adsorbed on the hairbrush and then are sent to the tide filtering bed;
the tide filtering bed is used for decomposing ammonia nitrogen and nitrite in the sewage, and the filtered aquaculture tail water is discharged to the buffer tank through the drainage pump;
the buffer tank is used for buffering and primary purification of filtered sewage, and the sewage after delayed purification is discharged to the artificial wetland through the overflow port; a reflux pump is arranged beside the buffer pool and is used for pumping the part of the filtered sewage stored in the buffer pool back to the tidal filter bed or the brush cabin for secondary decomposition and filtration; the buffer pool is provided with filter feeding aquatic animals and plants for purifying water;
the artificial wetland is a main purification area of the system, and aquatic plants and aquatic animals are placed in the artificial wetland and used for mixing and purifying the filtered and purified sewage again, and the purified water flows into the clean water tank;
the clean water tank is used for storing and using purified water, and the residual tail water is discharged to an external river channel through an overflow port;
the sludge pump is used for regularly pumping sludge generated in the sedimentation tank and the hairbrush tank to the tidal filter bed.
2. The ecological purification system of aquaculture tail water as claimed in claim 1, wherein the fluidized bed biological reaction tank is filled with biological fillers, the aeration plate is arranged at the bottom of the fluidized bed, and the biological fillers are tumbled into a fluidized state by aeration to complete nitration reaction.
3. The ecological purification system of aquaculture tail water as claimed in claim 1, wherein when the concentration of organic matters in aquaculture tail water exceeds a limit value, a return pump arranged beside the buffer tank pumps back sewage and introduces the sewage into the brush cabin.
4. The ecological purification system of aquaculture tail water as claimed in claim 1, wherein the tidal filtration bed is divided into an upper river sand layer and a bottom stone layer; planting green vegetables with different roots on the river sand layer; the river sand layer consists of sand with the diameter of 0.5mm-1.5mm, the thickness of the river sand layer is 40CM, and the river sand layer is used for filtering small particles of foreign matters in input sewage; the stone layer consists of stones with different sizes and is used for filtering large particles in sewage; the river sand layer is used for filtering small particle foreign matters in the sewage;
the tide filtering bed adopts a sewage filtering mode that the sewage overflows upwards from the bottom of the bed, and a drainage pump is started to drain the water in the filtering bed after the water level reaches a set height.
5. The ecological purification system of aquaculture tail water as claimed in claim 1, wherein the buffer tank is used for holding aquatic animals including one or more of spotted silver carp and river snail for water body purification.
6. The ecological purification system of aquaculture tail water as claimed in claim 1, wherein the buffer tank is used for planting plants in floating bed mode, and the planted plants comprise one or more of celery, cress, lettuce, pakchoi, spinach, lettuce, cabbage, cauliflower, broccoli, crowndaisy chrysanthemum and water spinach.
7. The ecological purification system for aquaculture tail water as claimed in claim 1, wherein the aquatic plants planted in the artificial wetland comprise one or more of watermifoil, cress and lotus seeds, and the aquatic plants absorb nutrient substances in the tail water to thoroughly purify the tail water.
8. The ecological purification system of aquaculture tail water as claimed in claim 1, wherein the aquatic animals thrown into the artificial wetland comprise one or more of river snails, finless eels and loaches and are used for wetland water body purification.
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| CN114212889A (en) * | 2021-11-10 | 2022-03-22 | 上海勘测设计研究院有限公司 | Ecological purification island of tidal river and backflushing sludge discharge method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114212889A (en) * | 2021-11-10 | 2022-03-22 | 上海勘测设计研究院有限公司 | Ecological purification island of tidal river and backflushing sludge discharge method thereof |
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