CN110950436A - Seawater pond culture tail water treatment system and method - Google Patents
Seawater pond culture tail water treatment system and method Download PDFInfo
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Abstract
The application discloses seawater pond culture tail water treatment system and treatment method, include through I level sedimentation tank, II level sedimentation tank, filter feeding animal purification tank, microorganism purification tank, marine alga purification tank that communicate in proper order purifies the tail water, this system selection suitable shellfish, microorganism, the advantage complementation in the alga variety forms purifying effect, realized the comprehensive high-efficient purification to breeding the tail water, its equipment is simple, high durability and convenient use, can effectively solve organic matter in the south seawater pond culture tail water, ammonia nitrogen, suspended solid, COD etc. to the poisonous harmful substance of sea area ecological environment influence.
Description
Technical Field
The application relates to the technical field of mariculture, in particular to a seawater pond culture tail water treatment system and method.
Background
With the rapid development of the mariculture industry, the excretion of culture objects, the decomposition and decomposition of residual baits and the poor water flow condition lead to the continuous accumulation of nutrient salts in the culture water body and seriously threaten the offshore ecological environment. The water quality and ecological environment of the aquaculture water body are deteriorated due to the fact that the aquatic animals are fed with quota and feed containing high protein and excrement and residual bait of the aquatic animals are deposited in the water, once the water quality is deteriorated, the ingestion and growth of the aquatic animals are seriously influenced, and even poisoning, diseases and death are caused. Meanwhile, aquaculture needs to discharge a large amount of aquaculture tail water, and the aquaculture tail water has high nitrogen and phosphorus contents, so that direct discharge easily causes eutrophication of surrounding water bodies, damages water sources and pollutes offshore environments.
The treatment of the tail water of aquaculture mostly adopts a static precipitation method, the effect is not ideal, and the time is long. In the prior art, for example, the chinese patent application CN102910789A discloses a seawater culture water composite circulation purification system, which is connected in series with a primary precipitation unit, a contact oxidation unit, a shellfish ecological pond unit and a plug-flow artificial wetland unit in sequence. However, the treatment of the tail water from aquaculture is less, which is also one of the problems of offshore pollution.
In the prior art, chinese patent application CN 105645685a discloses a method and equipment for treating wastewater discharged from seawater culture, which is characterized in that the method and equipment for treating wastewater discharged from seawater culture comprise a biochemical pond, a biological filter bed, a sieve bend, an electrocatalytic oxidation device and a filter pond. According to the method for treating the seawater culture wastewater, the organic matters, ammonia nitrogen and nitrite nitrogen in the seawater wastewater are decomposed through electrocatalytic oxidation to carry out a purification mode, so that the purification effect is insufficient. The Chinese patent application CN 10592469A discloses an integrated treatment method for aquaculture wastewater, which comprises a sedimentation tank, a biochemical tank, a plant absorption tank and the like, wherein a flocculating agent is added in the purification mode, aerobic denitrifying bacteria or heterotrophic nitrifying bacteria are added, and the purification mode purifies the wastewater by planting hybrid sixteen-numbered cress on a multi-channel baffled cress surface flow wetland, so that the operation is troublesome.
The technical problem to be solved in the field is to provide a simple, efficient and environment-friendly culture tail water treatment system and method.
Disclosure of Invention
The invention provides a seawater pond culture tail water treatment system, which comprises a filter feeding animal purification tank, a microorganism purification tank and a seaweed purification tank which are sequentially communicated;
filter feeding shellfish is cultured in the filter feeding purification pond, and the eutrophication degree of the water body is reduced by utilizing the filter feeding effect of the filter feeding shellfish;
the water in the microbial purification tank comprises nitrifying bacteria, denitrifying bacteria, bacillus, rhodopseudomonas and/or lactobacillus acidophilus, and a nitrifying system can be quickly established by the nitrifying bacteria and the rhodopseudomonas, so that the biochemical ammonia nitrogen removal efficiency is improved; the denitrifying bacteria have high treatment efficiency on nitrate and nitrite; the bacillus and the lactobacillus acidophilus can efficiently degrade residual feed, excrement and other organic matters in water and reduce bottom sediment.
The Gracilaria verrucosa is planted in the seaweed purifying pond.
Further, the seawater pond culture tail water treatment system further comprises one or more of the following 1) to 3):
1) when the amount of particles in the tail water to be treated is large and the water quality is muddy and unclear to be high-sewage tail water, the treatment system also comprises a first-stage sedimentation tank and a second-stage sedimentation tank which are sequentially communicated, wherein the second-stage sedimentation tank is communicated with the filter feeding animal purification tank;
removing most of particulate matters in the I-stage sedimentation tank through natural sedimentation;
the second-stage sedimentation tank comprises an ozone generating device and an ozone stirring device, and further eliminates particulate matters and organic matters through strong oxidation and flocculation of ozone, and effectively disinfects a water body;
2) selecting oyster of river-like river as filter-feeding shellfish;
3) a floating bed is arranged in the microbial purification tank, a flowerpot is arranged on the floating bed, and a filler ball and a heavy object are sequentially hung below the flowerpot; the filler balls are filled with black small sponge blocks, and can adsorb functional microorganisms and amplify the microorganisms in the filler balls.
Further, the seawater pond culture tail water treatment system further comprises one or more of the following 1) to 5):
1) the ozone stirring device comprises a water inlet pipe, a water pump and a water outlet pipe, and the ozone generating device is communicated with the water inlet pipe or the water outlet pipe; the sewage to be treated in the II-stage sedimentation tank enters the water inlet pipe under the suction action of the water pump, is mixed with the ozone prepared by the ozone generating device and then is discharged from the water outlet pipe, and then returns to the II-stage sedimentation tank again.
2) A floating bed is arranged on the water surface of the filter feeding animal purification tank, flowerpots are arranged on the floating bed, and oysters are hung and cultured under each flowerpot;
3) the spacing between the filler balls is 5 cm;
4) the seaweed purifying pool is internally provided with seaweed floating beds, each seaweed floating bed is formed by connecting a plurality of seaweed frames in series, and the heterocladia gracilaria is planted in the seaweed frames;
5) the seaweed purifying pool is also provided with a waterwheel type aerator which can increase the water mobility and promote the Gracilaria heteroclita to better absorb nitrogen and phosphorus.
Further, the seawater pond culture tail water treatment system is characterized in that U-shaped hidden pipes are arranged on the wall of each two adjacent ponds, and when the liquid level is higher than the U-shaped hidden pipes, waste liquid flows into the next pond through the hidden pipes. The height of the water inlet and outlet of the U-shaped concealed pipe in the former pool is higher than that of the water inlet and outlet of the U-shaped concealed pipe in the latter pool in sequence.
The invention also provides a seawater pond culture tail water treatment method, and the seawater pond culture tail water treatment system is adopted to treat the seawater culture tail water.
The method specifically comprises the following steps:
(1) and (3) discharging the culture tail water into a filter feeding animal purification pond, culturing the ostrea rivularis in the filter feeding animal purification pond, purifying for more than 6 hours by adopting the ostrea rivularis to obtain a good purification effect, and carrying out next treatment. Transferring the tail water treated by the ostrea rivularis into a microbial purification pool for treatment;
(2) nitrifying bacteria, denitrifying bacteria, bacillus, rhodopseudomonas and lactobacillus acidophilus are put into the water of the microbial purification pool, the putting amount of various microbes can be adjusted according to different water quality conditions, good purification effect can be obtained by adopting microbial purification treatment for more than 6 hours, the next treatment can be carried out, and the tail water treated by the microbial purification pool is transferred into an algae purification pool for treatment;
(3) the Gracilaria heterocladia is planted in the algae purification pond, and the algae purification treatment is adopted for more than 6 hours, so that the Gracilaria can be safely discharged.
Further, the method for treating tail water of seawater pond culture further comprises one or more of the following 1) to 5):
1) when the tail water to be treated is high-sewage tail water, the tail water is firstly discharged into a first-stage sedimentation tank, most of particulate matters are removed through natural sedimentation of the first-stage sedimentation tank, then the tail water is discharged into a second-stage sedimentation tank, an ozone generating device and an ozone stirring device of the second-stage sedimentation tank are started, the particulate matters and organic matters are further eliminated through strong oxidation and flocculation of ozone, meanwhile, the water body is effectively disinfected, and then the tail water is discharged into a filter feeding animal purification tank for treatment;
2) a floating bed is arranged in the microbial purification tank, a flowerpot is arranged on the floating bed, and a filler ball and a heavy object are sequentially hung below the flowerpot;
3) arranging seaweed floating beds in the seaweed purification pool, wherein each seaweed floating bed is formed by connecting a plurality of seaweed frames in series, and planting the heterocladia gracilaria in the seaweed frames;
4) a waterwheel type aerator is arranged in the seaweed purifying tank.
Further, the method for treating tail water of seawater pond culture further comprises one or more of the following steps 1) to 3):
1) in the filter feeding animal purification pond, 4 flowerpots are arranged on the water surface per square meter, and oysters near rivers are hung and cultured under each flowerpot;
2) 4 flowerpots are arranged on the water surface of each square meter in the microbial purification pool, and 5 filler balls and 1 weight are sequentially hung under each flowerpot; the spacing between the filler balls is 5 cm;
3) in the algae purifying pond, 1 algae frame is put on each square meter of water surface, 2.5kg of fresh and alive gracilaria heterochoriformis is put in each algae frame, and when 80% of the gracilaria heterochoriformis in the algae frame is rotten due to weather reasons, new gracilaria heterochoriformis needs to be supplemented in time; when the isocorychophragmus within the seaweed frame is overgrown with the seaweed frame, the seaweed is picked in time, and 50% of the seaweed can be picked.
The beneficial effects of the invention include:
(1) the tail water treatment system disclosed by the invention has the advantages that the treatment difficulty of the second-level sedimentation tank is reduced through simple sedimentation of the first-level sedimentation tank; the aquatic animals in the filter feeding animal purification tank are provided with a proper living environment through the treatment of the II-level sedimentation tank; the microbial purification tank efficiently reduces inorganic nitrogen and inorganic phosphorus in the water body, and prepares for the standard-reaching lifting of the water quality of the seaweed purification tank. Through the cooperation of several purification ponds that set gradually, realized the high-efficient purification to mariculture tail water.
(2) The shellfish, microorganism and algae varieties selected by the invention are all high temperature resistant varieties, the purification efficiency is high, the advantages on the purification effect are mutually complemented, and the comprehensive and efficient purification of the culture tail water is realized. Shellfish culture and algae planting are used as auxiliary value-added products generated by system operation, shellfish culture can be obtained once every 6 months in the system, and the additional income is increased by about 2 ten thousand yuan/mu; the algae can be harvested once in the system for 3 months, and the additional income is increased by about 1 ten thousand yuan/mu.
(3) The seawater pond culture tail water treatment system is low in construction cost, stable in treatment effect and strong in technology reproducibility; the device is simple, the use is convenient, the toxic and harmful substances which influence the ecological environment of the sea area such as organic matters, ammonia nitrogen, suspended matters, COD and the like in the tail water of the southern seawater pond culture can be effectively solved, and the purified tail water of the culture reaches the discharge standard of seawater culture water discharge requirement (SC/T9103-2007).
Drawings
FIG. 1 is a top view of a seawater pond culture tail water treatment system according to embodiment 1 of the present invention;
FIG. 2 is a sectional view of a seawater pond culture tail water treatment system according to embodiment 1 of the present invention;
FIG. 3 is a schematic flow chart of the method for treating tail water of seawater pond culture according to the invention.
In the figure, a sedimentation tank 1, a sedimentation tank 2 II, a filter feeding animal purification tank 3, a microorganism purification tank 4, a seaweed purification tank 5, a hidden pipe water outlet 6U, a hidden pipe water inlet 7U, a floating bed 8, a seaweed frame 9, a ostrea rivularis 10, a filler ball 11, an equipment room 12, an ozone generating device 13, a breeding tail water inlet pipe 14 and a treated water outlet pipe 15.
Detailed Description
The experimental procedures used in the following examples are all conventional procedures unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
Examples 1,
As shown in figures 1-2, a seawater pond culture tail water treatment system comprises a first-stage sedimentation tank 1, a second-stage sedimentation tank 2, a filter feeding animal purification tank 3, a microorganism purification tank 4 and a seaweed purification tank 5 which are sequentially communicated.
The stage I sedimentation tank 1 removes most of particulate matters through natural sedimentation.
The second-stage sedimentation tank 2 comprises an ozone generating device 13 and an ozone stirring device (not shown in the figure), the ozone stirring device comprises a water inlet pipe, a water pump and a water outlet pipe, and the ozone generating device is communicated with the water inlet pipe or the water outlet pipe; the sewage to be treated in the II-stage sedimentation tank 2 enters the water inlet pipe under the suction action of the water pump, is mixed with the ozone prepared by the ozone generating device 13 and then is discharged from the water outlet pipe, and then returns to the II-stage sedimentation tank again. Through the strong oxidation and flocculation of ozone, further eliminate particulate matter, organic matter, carry out effective disinfection to the water simultaneously.
A floating bed 8 is arranged on the water surface of the filter feeding animal purification pool 3, flowerpots are arranged on the floating bed 8, 4 flowerpots are arranged on the water surface per square meter, and 20 ostrea rivularis 10 are hung and cultured under each flowerpot; plankton and small-particle organic matters can be absorbed by the crassostrea rivularis 10.
Set up in the microbial purification pond 4 and float bed 8, be provided with the flowerpot on floating bed 8, be provided with 4 flowerpots on every square meter surface of water, hang 5 filler balls 11 and 1 heavy object under every flowerpot in proper order, 11 intervals 5cm of filler balls. Nitrifying bacteria, denitrifying bacteria, bacillus, rhodopseudomonas and lactobacillus acidophilus are put into the pool water; 1-6 g of microorganisms are used for each cubic meter of water, and the adding amount of various microorganisms can be adjusted according to the change of water quality conditions; the putting times of various microorganisms can be adjusted according to the film hanging effect of the sponge in the filler ball; the nitrifying bacteria and the rhodopseudomonas can quickly establish a nitrifying system, so that the biochemical ammonia nitrogen removal efficiency is improved; the denitrifying bacteria have high treatment efficiency on nitrate and nitrite; the bacillus and the lactobacillus acidophilus can efficiently degrade residual feed, excrement and other organic matters in water and reduce bottom sediment.
The seaweed purifying pool 5 is provided with seaweed floating beds, each seaweed floating bed is formed by connecting a plurality of seaweed frames 9 of 0.7m multiplied by 0.3m in series, 1 seaweed frame 9 is thrown on the water surface of each square meter, and 2.5kg of Gracilaria heterophylla is thrown in each seaweed frame 9; the algae purifying pond 5 is provided with a waterwheel type aerator, which can increase the water mobility and promote the Gracilaria heterocladia to better absorb nitrogen and phosphorus.
And when the liquid level is higher than the concealed pipes, the waste liquid flows into the next tank through the concealed pipes. The height of the water inlet and outlet of the U-shaped concealed pipe in the former pool is higher than that of the water inlet and outlet of the U-shaped concealed pipe in the latter pool in sequence.
The treatment system of the embodiment is suitable for treating the highly polluted tail water.
Examples 2,
A seawater pond culture tail water treatment system comprises a filter feeding animal purification tank, a microorganism purification tank and a seaweed purification tank which are sequentially communicated.
A floating bed is arranged on the water surface of the filter feeding animal purification tank, flowerpots are arranged on the floating bed, 4 flowerpots are arranged on the water surface per square meter, and 20 ostrea rivularis are hung and cultured under each flowerpot; plankton and small-particle organic matters can be absorbed by the crassostrea rivularis. Set up the floating bed in the microbial purification pond, be provided with the flowerpot on the floating bed, be provided with 4 flowerpots on every square meter surface of water, hang 5 filler balls and 1 heavy object under every flowerpot in proper order, filler ball interval 5 cm. Nitrifying bacteria, denitrifying bacteria, bacillus, rhodopseudomonas and lactobacillus acidophilus are put into the pool water; 1-6 g of microorganisms are used for each cubic meter of water, and the adding amount of various microorganisms can be adjusted according to the change of water quality conditions; the putting times of various microorganisms can be adjusted according to the film hanging effect of the sponge in the filler ball; the nitrifying bacteria and the rhodopseudomonas can quickly establish a nitrifying system, so that the biochemical ammonia nitrogen removal efficiency is improved; the denitrifying bacteria have high treatment efficiency on nitrate and nitrite; the bacillus and the lactobacillus acidophilus can efficiently degrade residual feed, excrement and other organic matters in water and reduce bottom sediment.
The seaweed purifying pool is internally provided with seaweed floating beds, each seaweed floating bed is formed by connecting a plurality of seaweed frames of 0.7m multiplied by 0.3m in series, 1 seaweed frame is put on each square meter of water surface, and 2.5kg of heterocladia are put in each seaweed frame; the seaweed purifying pool is provided with a waterwheel type aerator, which can increase the water mobility and promote the Gracilaria heterocladia to better absorb nitrogen and phosphorus.
The liquid level difference is kept between two adjacent ponds, U-shaped hidden pipes are arranged on the walls of the two adjacent ponds, the tops of the U-shaped hidden pipes are respectively positioned at two sides of the middle upper part of the pond wall, and when the liquid level is higher than the hidden pipes, the waste liquid flows into the next pond through the hidden pipes. The height of the water inlet and outlet of the U-shaped concealed pipe in the former pool is higher than that of the water inlet and outlet of the U-shaped concealed pipe in the latter pool in sequence.
The treatment system of the embodiment is suitable for treating the low-pollution tail water.
Examples 3,
The tail water to be treated comes from a certain culturing farm in Hainan, the content of particulate matters in the water body is high, the water body is turbid and is high-pollution tail water, and the content of original pollutants is shown in data before treatment in the following table 1.
TABLE 1 pollutant content before and after treatment of the cultivation Tail Water
The treatment system of embodiment 1 is adopted for treatment, and the specific treatment method comprises the following steps:
(1) will breed the tail waterDischarging into I-stage sedimentation tank via flow channel, and controlling flow rate at 20-25m3And h, removing most of particulate matters through natural sedimentation, and enabling the settled tail water to flow into a II-stage sedimentation tank through a U-shaped concealed pipe arranged on the tank wall.
(2) The water pump of the ozone generating device (ozone machine) and the ozone stirring device is started, sewage to be treated in the second-level sedimentation tank enters the water inlet pipe under the suction effect of the water pump, is discharged from the water outlet pipe after being mixed with ozone prepared by the ozone generating device, returns to the second-level sedimentation tank again, further eliminates granular substances and organic substances through the strong oxidation and flocculation effect of the ozone, and effectively disinfects the water body. The tail water treated by the ozone flows into the filter feeding animal purifying pool through a U-shaped concealed pipe arranged on the pool wall.
(3) A floating bed is arranged on the water surface of the filter feeding animal purification tank, flowerpots are arranged on the floating bed, 4 flowerpots are arranged on the water surface per square meter, and 20 ostrea rivularis are hung and cultured under each flowerpot; plankton and small-particle organic matters can be absorbed by the crassostrea rivularis. The tail water treated by the filter feeding animals flows into the microorganism purification tank through a U-shaped concealed pipe arranged on the tank wall. If the death rate of oysters is more than 50%, the oysters need to be supplemented.
(4) Set up the floating bed in the microbial purification pond, be provided with the flowerpot on the floating bed, be provided with 4 flowerpots on every square meter surface of water, hang 5 filler balls and 1 heavy object under every flowerpot in proper order, filler ball interval 5 cm. Nitrifying bacteria, denitrifying bacteria, bacillus, rhodopseudomonas and lactobacillus acidophilus are put into the pool water; 1-6 g of microorganisms are used for each cubic meter of water, and the adding amount of various microorganisms can be adjusted according to the change of water quality conditions; the putting times of various microorganisms can be adjusted according to the film hanging effect of the sponge in the filler ball; the nitrifying bacteria and the rhodopseudomonas can quickly establish a nitrifying system, so that the biochemical ammonia nitrogen removal efficiency is improved; the denitrifying bacteria have high treatment efficiency on nitrate and nitrite; the bacillus and the lactobacillus acidophilus can efficiently degrade residual feed, excrement and other organic matters in water and reduce bottom sediment.
(5) The seaweed purifying tank is provided with seaweed floating beds, each seaweed floating bed is formed by connecting a plurality of seaweed frames of 0.7m multiplied by 0.3m in series,putting 1 seaweed frame on the water surface per square meter, and putting 2.5kg of fresh and alive Gracilaria verrucosa without other miscellaneous algae in each seaweed frame; a waterwheel type aerator is arranged in the seaweed purifying tank, the power of the waterwheel type aerator is 1.5KW, and the aeration capacity is more than or equal to 3.5 (O)2) The effective area of the application is 8 mu, so that the water fluidity is increased, and the Gracilaria divaricata is promoted to better absorb nitrogen and phosphorus.
When 80% of the Gracilaria verrucosa in the seaweed frame is rotten due to weather reasons and the like, new Gracilaria verrucosa needs to be supplemented in time; when the seaweed frame is too full, the Gracilaria heterochoriformis in the seaweed frame is picked in time and can be picked by 50 percent.
As shown in the data after the treatment in Table 1, the tail water treated by the treatment method of the embodiment meets the discharge standard of the marine culture water discharge requirement (SC/T9103-2007), and can be safely discharged.
Examples 4,
The treated culture tail water comes from a certain culture farm in Hainan, the content of particulate matters in the water body is less, and the water body is cleaner and is low-pollution tail water.
The processing system of embodiment 2 is adopted for processing, and the specific processing method comprises the following steps:
(1) discharging the culture tail water into a filter feeding animal purification tank through a flow passage, and controlling the flow speed to be 20-25m3H is used as the reference value. A floating bed is arranged on the water surface of the filter feeding animal purification tank, flowerpots are arranged on the floating bed, 4 flowerpots are arranged on the water surface per square meter, and 20 ostrea rivularis are hung and cultured under each flowerpot; absorbing plankton and small-particle organic matters through the crassostrea rivularis. The tail water treated by the filter feeding animals flows into the microorganism purification tank through a U-shaped concealed pipe arranged on the tank wall. If the death rate of the oysters is found to exceed 50 percent, the oysters need to be supplemented; oysters were not fed otherwise because the tail water nutrient was sufficient.
(2) Set up the floating bed in the microbial purification pond, be provided with the flowerpot on the floating bed, be provided with 4 flowerpots on every square meter surface of water, hang 5 filler balls and 1 heavy object under every flowerpot in proper order, filler ball interval 5 cm. Nitrifying bacteria, denitrifying bacteria, bacillus, rhodopseudomonas and lactobacillus acidophilus are put into the pool water; 1-6 g of microorganisms are used for each cubic meter of water, and the adding amount of various microorganisms can be adjusted according to the change of water quality conditions; the putting times of various microorganisms can be adjusted according to the film hanging effect of the sponge in the filler ball; the nitrifying bacteria and the rhodopseudomonas can quickly establish a nitrifying system, so that the biochemical ammonia nitrogen removal efficiency is improved; the denitrifying bacteria have high treatment efficiency on nitrate and nitrite; the bacillus and the lactobacillus acidophilus can efficiently degrade residual feed, excrement and other organic matters in water and reduce bottom sediment.
(5) The seaweed purifying pool is internally provided with seaweed floating beds, each seaweed floating bed is formed by connecting a plurality of seaweed frames of 0.7m multiplied by 0.3m in series, 1 seaweed frame is put on each square meter of water surface, and 2.5kg of fresh and alive Gracilaria verrucosa without other miscellaneous algae is put in each seaweed frame; a waterwheel type aerator is arranged in the seaweed purifying tank, the power of the waterwheel type aerator is 1.5KW, and the aeration capacity is more than or equal to 3.5 (O)2) The effective area of the application is 8 mu, so that the water fluidity is increased, and the Gracilaria divaricata is promoted to better absorb nitrogen and phosphorus.
When 80% of the Gracilaria verrucosa in the seaweed frame is rotten due to weather reasons and the like, new Gracilaria verrucosa needs to be supplemented in time; when the seaweed frame is too full, 50% of the Gracilaria heterochoriformis can be harvested in time.
The tail water treated by the treatment method of the embodiment can enter the culture environment for recycling after being disinfected.
Claims (8)
1. A seawater pond culture tail water treatment system is characterized by comprising a filter feeding animal purification tank, a microorganism purification tank and a seaweed purification tank which are sequentially communicated;
the filter feeding shellfish is cultured in the filter feeding purification pond, and the eutrophication degree of the water body is reduced by utilizing the filter feeding effect of the filter feeding shellfish;
a floating bed is arranged in the microbial purification tank, and the tank water comprises nitrifying bacteria, denitrifying bacteria, rhodopseudomonas and/or lactobacillus;
the seaweed purifying pond is used for planting the Gracilaria heterolophylla.
2. The seawater pond culture tail water treatment system according to claim 1, which comprises one or more of the following 1) -3):
1) the treatment system also comprises a first-stage sedimentation tank and a second-stage sedimentation tank which are sequentially communicated, wherein the second-stage sedimentation tank is communicated with the filter feeding animal purification tank;
most of particulate matters are removed by natural sedimentation in the I-stage sedimentation tank;
the second-stage sedimentation tank comprises an ozone generating device and an ozone stirring device, and through strong oxidation and flocculation of ozone, particulate matters and organic matters are further eliminated, and meanwhile, water is effectively disinfected;
2) selecting ostrea rivularis from the filter feeding shellfish;
3) the microbial purification tank is characterized in that a floating bed is arranged in the microbial purification tank, a flowerpot is arranged on the floating bed, and a filler ball and a heavy object are sequentially hung under the flowerpot.
3. The seawater pond culture tail water treatment system according to claim 2, which comprises one or more of the following 1) to 5):
1) the ozone stirring device comprises a water inlet pipe, a water pump and a water outlet pipe, and the ozone generating device is communicated with the water inlet pipe or the water outlet pipe;
2) a floating bed is arranged on the water surface of the filter feeding animal purification tank, a flowerpot is arranged on the floating bed, and oysters are hung and cultured under the flowerpot;
3) the spacing between the filler balls is 5 cm;
4) the seaweed purifying pool is internally provided with seaweed floating beds, each seaweed floating bed is formed by connecting a plurality of seaweed frames in series, and the heterocladia gracilaria is planted in the seaweed frames;
5) a waterwheel type aerator is also arranged in the seaweed purifying tank.
4. A seawater pond culture tail water treatment system according to any one of claims 1 to 3, wherein the walls of two adjacent ponds are provided with U-shaped hidden pipes, and when the liquid level is higher than the U-shaped hidden pipes, the waste liquid flows into the next pond through the hidden pipes.
5. A seawater pond culture tail water treatment method, characterized in that the seawater pond culture tail water treatment system of any one of claims 1 to 4 is adopted to treat the seawater pond culture tail water.
6. The method for treating tail water from seawater pond culture according to claim 5, comprising the steps of:
(1) discharging the culture tail water into a filter feeding animal purification pool, culturing the ostrea rivularis in the filter feeding animal purification pool, and transferring the tail water treated by the ostrea rivularis into a microbial purification pool for treatment;
(2) arranging a floating bed in the microbial purification pool, putting nitrobacteria, denitrifying bacteria, rhodopseudomonas and/or lactobacillus into pool water, and transferring tail water treated by the microbial purification pool into an algae purification pool for treatment;
(3) planting the Gracilaria heterolophylla in the seaweed purifying pond.
7. The method for treating tail water of seawater pond culture according to claim 6, which comprises one or more of the following 1) to 4):
1) when the tail water to be treated is high-sewage tail water, the tail water is firstly discharged into a first-stage sedimentation tank, most of particulate matters are removed through natural sedimentation of the first-stage sedimentation tank, then the tail water is discharged into a second-stage sedimentation tank, an ozone generating device and an ozone stirring device of the second-stage sedimentation tank are started, the particulate matters and organic matters are further eliminated through strong oxidation and flocculation of ozone, meanwhile, the water body is effectively disinfected, and then the tail water is discharged into a filter feeding animal purification tank for treatment;
2) a floating bed is arranged in the microbial purification tank, a flowerpot is arranged on the floating bed, and a filler ball and a heavy object are sequentially hung below the flowerpot;
3) arranging seaweed floating beds in the seaweed purification pool, wherein each seaweed floating bed is formed by connecting a plurality of seaweed frames in series, and planting the heterocladia gracilaria in the seaweed frames;
4) a waterwheel type aerator is arranged in the seaweed purifying tank.
8. The method for treating tail water of seawater pond culture according to claim 7, which comprises one or more of the following 1) to 3):
1) in the filter feeding animal purification pond, 4 flowerpots are arranged on the water surface of each square meter, and the ostrea rivularis is cultured in a hanging mode under each flowerpot;
2) 4 flowerpots are arranged on the water surface of each square meter in the microbial purification pool, and 5 filler balls and 1 weight are sequentially hung under each flowerpot; the spacing between the filler balls is 5 cm;
3) in the algae purifying pond, 1 algae frame is put on the water surface of each square meter, and 2.5kg of fresh and alive gracilaria heterophylla is put in each algae frame.
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