CN108203161B - Aquaculture water treatment and recycling device and treatment method - Google Patents
Aquaculture water treatment and recycling device and treatment method Download PDFInfo
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- CN108203161B CN108203161B CN201810149792.7A CN201810149792A CN108203161B CN 108203161 B CN108203161 B CN 108203161B CN 201810149792 A CN201810149792 A CN 201810149792A CN 108203161 B CN108203161 B CN 108203161B
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
-
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Water Supply & Treatment (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
- Farming Of Fish And Shellfish (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention relates to the technical field of sewage advanced treatment and recycling, in particular to an aquaculture water treatment and recycling device and a treatment method. The device comprises a baffling deep bed filter system and a fault seepage reoxygenation nitrification bed, wherein a water outlet of the baffling deep bed filter system is connected with a water inlet of the fault seepage reoxygenation nitrification bed through a pipeline, the baffling deep bed filter system is composed of at least one independent baffling deep bed filter, and a water inlet and a water outlet are respectively arranged at the same height on two sides of the baffling deep bed filter system. After the treatment by the device, the water quality index is monitored, the pH is controlled within the range of 7.8-8.2, the ammonia nitrogen content is less than 0.3mg/L, the nitrite content is less than 0.1mg/L, and the dissolved oxygen content is more than 4.0mg/L, so that the growth requirements of aquaculture animals are met, and further, the deep treatment and the cyclic utilization of aquaculture water are realized.
Description
Technical Field
The invention relates to the technical field of sewage advanced treatment and recycling, in particular to an aquaculture water treatment and recycling device and a treatment method.
Background
Factory breeding is an important mode of modern fishery breeding. The development of the aquaculture industry in China is seriously troubled by the problems of water environment pollution, frequent aquatic diseases and the like caused by large-scale industrial aquaculture. At present, the main mode of industrial culture is an extensive water taking-culture-direct discharging culture mode, and large-scale extensive industrial culture causes water environment pollution and frequent aquatic product diseases. The reason for this is that the increasing serious offshore pollution causes great threat and harm to mariculture, which increases the cost of treating industrial aquaculture water sources, and meanwhile, the large amount of aquaculture wastewater discharged has great influence on the water quality of offshore aquaculture water areas. In addition, a large amount of underground water needs to be extracted from an industrial culture base taking underground salt water resources as a water source, seawater further invades an underground aquifer, and new salt is brought by discharging high-salinity culture tail water into coastal soil, so that the process of soil salinization is accelerated. As a technology-intensive industrial culture mode, the circulating water culture system has the advantages of high culture density, controllable culture environment, small damage to ecological environment, quick growth of cultured organisms and the like, can reduce tail water discharge, protect offshore ecological environment, and obtain high-yield and high-quality aquatic products. Therefore, the treatment and recycling of aquaculture water is a key development direction in the field of aquaculture. The recirculating aquaculture is the inevitable choice for sustainable development of land-based mariculture in China, but the prior art for water treatment and recycling of aquaculture systems has the disadvantages of less technology, higher treatment cost and general nitrogen removal effect, and greatly limits the popularization and application of the recirculating aquaculture technology. Therefore, the development of the aquaculture water treatment and recycling technology with low cost and simple operation has important significance and practical application value.
Compared with advanced sewage treatment processes such as a membrane bioreactor, a biological fluidized bed and the like, the deep-bed filter system has the advantages of small occupied area, adjustable operation mode, low construction cost, low operation cost and the like, and has obvious effect of removing low-concentration pollutants in water bodies, particularly tail water. Through the literature search of the prior art, Wangqing et al mention that the deep bed filter is adopted to treat the tail water of the sewage treatment plant in the 'deep denitrification treatment of the effluent of the Dongkong sewage plant by adopting the deep bed filter' (industrial water treatment, 2014,28(11): 66-68); zhang Song et al in "activated carbon floating filter for removing organic matter from high algae-laden raw water" mentioned that deep bed filters can be used for treating source water (China Water supply and drainage, 2004,20(5): 47-49). The deep-bed filter has a deep filter body, the laying thickness of the filter material is more than 1.8 meters, and the thickness of the filter material in the deep-bed filter reaches 4 meters or more under special conditions, so that when the deep-bed filter is applied to a sewage treatment plant with poor geological conditions, the problems of difficult maintenance of a deep foundation pit and the like can be caused, the civil engineering investment is far higher than that of a common filter, and the defect limits the wide application of the deep-bed filter technology in the field of water treatment. At present, no report on the application of a deep bed filter technology in aquaculture water treatment and recycling exists.
Disclosure of Invention
The invention aims to provide a device and a method for treating and recycling aquaculture water, aiming at the defects of the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides an aquaculture water treatment and cyclic utilization device, the device includes baffling deep bed filter tank system and fault seepage flow reoxygenation nitration bed, and the delivery port of baffling deep bed filter tank system passes through the pipeline and links to each other with fault seepage flow reoxygenation nitration bed water inlet, and baffling deep bed filter tank system comprises at least one independent baffling deep bed filter tank, and the same height in baffling deep bed filter tank system both sides is equipped with water inlet and delivery port respectively.
The deep baffling bed filter system is characterized in that a plurality of independent deep baffling bed filters are sequentially communicated in series through pipelines to form a series multi-stage deep baffling bed filter system, and a baffle is inserted into each independent deep baffling bed filter;
or the baffling deep bed filter system is formed by an independent baffling deep bed filter and a plurality of baffles inserted in the deep bed filter to form a partition plate type multi-stage baffling deep bed filter system.
The baffle inserted in the deep baffling bed filter system and the wall of the deep baffling bed filter or the baffle and the baffle form water flow passages, and all the water flow passages are communicated in sequence, wherein the first water flow passage and the last water flow passage of the deep baffling bed filter system are open at the top ends, and the top ends of the other water flow passages are closed; the water flow directions of the two sides of the baffle plate are opposite in the two construction modes, so that the baffling is formed.
Laying modified filter materials in each filter of the baffling deep bed filter system; the serial multistage baffling deep bed filter tank system has independent baffling deep bed filter tanks as one stage, and the modified filtering material laid in each stage may be the same or different.
A bed body support is arranged in the fault seepage reoxygenation nitrification bed, more than one drip pipe is arranged at the uppermost support of the bed body, and modified filter materials are respectively paved on the rest supports and are further staggered and divided into an air fault reoxygenation area and a filter material filling seepage denitrification area between the filter materials; the laying thickness of each layer of modified filter material is 5-10 cm, and the distance between each layer and the top is 5-10 cm. The height of the bed body is the same as that of the upstream baffling deep bed filter.
The modified filter material is formed by coating chitosan-starch-acetic acid mixed membrane liquid on the surface of the filter material; wherein the mixed membrane solution is prepared by dissolving chitosan and water-soluble starch powder in 1-5% glacial acetic acid solution and mixing polyethylene glycol, and the concentrations of the chitosan, the starch and the polyethylene glycol are all 1-5%.
The particle size of the filter material is 2-40 mm, and the filter material is common filter material for water treatment, such as fluidized bed filter material, ceramsite, fiber ball filter material, granular activated carbon, gravel, cobblestone and the like.
The method for treating and circulating aquaculture water by adopting the device comprises the following steps:
1) domestication treatment of a baffling deep bed filter tank system: sprinkling a mixed solution of excrement and residual bait of the culture pond into the baffling deep bed filter system; then sequentially inoculating anaerobic ammonium oxidation bacteria, nitrifying bacteria and aerobic denitrifying microorganisms, and culturing for 1-5 d; adding polyacrylamide and common antibiotics for aquaculture into the filter tank, and then domesticating for 3-14 days to form a stable-running and impact-resistant nitrification-aerobic denitrification biological membrane on the surface of the modified filter material;
2) fault seepage reoxygenation nitrifying bed domestication: preparing nitrobacteria and aerobic denitrification microorganism suspension in advance, culturing for 1-5 days, spraying the microorganism suspension into the nitrification bed every day through a dripping pipe, culturing for 3-14 days, and further forming a nitrification-aerobic denitrification biological membrane which is stable in operation and resistant to impact on the surface of the modified filter material;
3) the culture water flows into each closed one-way water flow passage in the system through a water inlet of the baffling deep bed filter system, the water flow passes through multi-stage baffling, the total flow reaches 3-15 m, and the total hydraulic retention time is 2-24 h, so that organic matters, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen in the water can be removed. Then, the outlet water of the baffling deep bed filter tank flows into a water inlet of a fault seepage reoxygenation nitrification bed through a pipeline, and is subjected to the alternate action of an air fault reoxygenation area and a filter material filling seepage denitrification area among a plurality of layers of filter materials in the bed body, so that the dissolved oxygen in water is increased, organic matters, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen are further removed, and then the obtained regenerated culture water is sent to a culture pond.
The water quality index in the culture pond is monitored, the pH is controlled within the range of 7.8-8.2, the ammonia nitrogen content is less than 0.3mg/L, the nitrite content is less than 0.1mg/L, and the dissolved oxygen content is more than 4.0mg/L, so that the growth requirement of aquaculture animals is met, and further the advanced treatment and recycling of aquaculture water are realized. The bait adding amount is increased in the later period of cultivation, the water quality of the pond water is deteriorated, the water quality index does not reach the standard for a long time, the total hydraulic retention time is increased by 1-2 times, and the circulating water treatment effect is improved.
The culture water conveyed into the culture pond can be introduced into the device again, sequentially flows through the baffling deep bed filter system and the fault seepage reoxygenation nitrification bed, and is subjected to strengthening treatment again, so that the culture water can be recycled.
And (3) controlling the content of suspended solids in the fish manure residual bait suspension splashed in the step 1) to be 1-10 g/L.
The anammox bacteria belongs to the phylum of Aphyllophorales, and comprises one or more of Brocadia, Kuenenia, Jettenia, Anamoxoglobus and Scalindua; the nitrifying bacteria are nitrifying bacteria or nitric acid bacteria, wherein the nitrifying bacteria comprise nitrosomonas, nitrosococcus, nitrosospira and the like, and the nitric acid bacteria comprise nitrifying bacteria, nitrococcus, nitrocystis and the like; the aerobic denitrifying microorganism is one or more of Alcaligenes, Paracoccus and Pseudomonas; the concentration of the bacterial liquid is 0.2-1.0 g/L.
Wherein, the inoculation amount of the anaerobic ammonium oxidation bacteria, the nitrifying bacteria and the aerobic denitrification microorganisms in the step 1) is 1.0g/m3(ii) a The inoculation amount of the nitrifying bacteria and the aerobic denitrifying microorganisms in the step 2) is 1.0g/m3。
In the step 1), the content of suspended solids in the fish manure residual bait suspension liquid splashed in the initial stage of starting the baffling deep bed filter tank is controlled to be 1-10 g/L.
In the step 1), the addition concentration of polyacrylamide is 0.01-10 ppm, and the addition concentration of antibiotics is 10-100 mug/L; wherein, the common antibiotics for aquaculture are sulfadiazine, oxytetracycline, florfenicol or ofloxacin.
The aquaculture animals are one or more of fish, shrimp, shellfish, sea cucumber, etc.
The invention has the advantages that:
1) the device effectively overcomes various technical problems of the traditional deep bed filter tank technology for treating the culture water body. The construction of the baffling deep-bed filter tank can overcome the problems of high construction cost and high difficulty caused by the deep tank body of the common deep-bed filter tank, and can ensure that the water flow is baffled to bypass on the premise of ensuring the depth of a small tank, thereby effectively promoting the total flow path of the water body and improving the quality of the outlet water. The investment capital cost is low, the circulating water treatment system can be quickly and emergently erected according to actual conditions, the problem of lack of high-quality water sources in coastal areas can be effectively solved, the problem of serious pollution caused by discharge of aquaculture tail water can be solved, stable and abundant reclaimed water is obtained, and the high-quality tail water is recycled for an industrial aquaculture system.
2) The construction stage of the nitrification-denitrification biological membrane on the modified filter material of the baffling deep bed filter tank increases a polyacrylamide coagulation membrane promotion link and an antibiotic resistance domestication link, and improves the running stability and the impact resistance of the biological membrane on the surface of the modified filter material.
3) Aiming at the characteristic of oxygen enrichment in aquaculture water, nitrogen pollutants are directly removed through aerobic denitrification under the condition of oxygen enrichment in water, the defect that the prior step of removing oxygen in advance is required by denitrification is overcome, and when treated tail water subsequently enters a culture pond again, manual aeration reoxygenation is not required, so that the energy consumption is greatly reduced, the operation cost is reduced, and the simple operability of water treatment is ensured.
Drawings
Fig. 1 shows a series baffled deep bed filter system (fig. 1-a shows downflow influent and upflow effluent, and fig. 1-b shows upflow influent and downflow effluent) according to an embodiment of the present invention. Wherein (1) is the wall of the filter tank; (2) a modified filter material is attached with a nitrification-denitrification biological membrane; (3) is a baffling clapboard; (4) the seal is formed.
Fig. 2 shows a baffle single filter system (fig. 2-a shows downflow inflow and upflow outflow, and fig. 2-b shows upflow inflow and downflow outflow) according to an embodiment of the present invention. Wherein (1) is the wall of the filter tank; (2) a modified filter material is attached with a nitrification-denitrification biological membrane; (3) is a baffling clapboard; (4) the seal is formed.
FIG. 3 is a fault percolation reoxygenation nitrifying bed provided by an embodiment of the invention. Wherein (5) is a dripping pipe; (6) is an air fault reoxygenation area between filter materials; (7) filling a seepage denitrification area for the modified filter material, and attaching a nitrification-denitrification biological membrane to the modified filter material; (8) is a bed body bracket; (9) is regenerated water.
Detailed Description
The present invention is further illustrated by the following examples, which, however, are not intended to limit the scope of the invention.
The invention relates to a device for constructing a culture pond, which comprises a baffling deep bed filter and a fault seepage reoxygenation nitrification bed. Laying chitosan-starch-acetic acid modified filter materials in the baffled deep bed filter, sequentially inoculating anaerobic ammonium oxidation bacteria, nitrobacteria and aerobic denitrifying microorganisms, and then adding polyacrylamide and antibiotics for domestication to promote the formation of a nitrification-denitrification biological membrane. Laying chitosan-starch-acetic acid modified filter material in the fault seepage reoxygenation nitrification bed, spraying nitrobacteria and aerobic denitrification microorganism suspension to construct a nitrification-denitrification biological membrane. After the biofilm formation is finished, the effluent of the culture pond is subjected to enhanced treatment in a baffling deep bed filter to remove ammonia nitrogen and organic matters, the effluent of the baffling deep bed filter flows into a fault seepage reoxygenation nitrification bed for further advanced treatment to remove ammonia nitrogen and nitrite nitrogen, and the effluent is reoxygenated and then conveyed to the culture pond. Then, new water in the culture pond is introduced again, passes through the baffling deep bed filter and the fault seepage reoxygenation nitrification bed, and is continuously and repeatedly circularly treated. The water quality index is monitored, the pH is controlled within the range of 7.8-8.2, the ammonia nitrogen content is less than 0.3mg/L, the nitrite content is less than 0.1mg/L, and the dissolved oxygen content is more than 4.0mg/L, so that the growth requirement of aquaculture animals is met, and further the advanced treatment and recycling of aquaculture water are realized.
Example 1
And carrying out deep treatment and recycling of tail water in the prawn culture base in the yellow river delta region.
Referring to fig. 1-a, the device comprises a deep baffling bed filter system and a fault seepage reoxygenation nitrification bed, wherein a water outlet of the deep baffling bed filter system is connected with a water inlet of the fault seepage reoxygenation nitrification bed through a pipeline, the deep baffling bed filter system is formed by connecting a plurality of independent deep baffling bed filters (provided with 3 independent deep baffling bed filters in the embodiment) in series to form a multistage deep baffling bed filter system, a baffle is inserted into each independent deep baffling bed filter, and the upper ends of the two sides of the deep baffling bed filter system are respectively provided with a water inlet and a water outlet.
The baffle that inserts and establish in every independent baffling deep bed filter in the deep bed filter system of baffling and the pool wall of this baffling deep bed filter form the rivers passageway, and each rivers passageway communicates in proper order, and wherein the first rivers passageway of deep bed filter system of baffling and tail rivers passageway are open for the top, and all the other rivers passageway tops are closed (this embodiment forms 6 altogether, and the head and the tail top is open, and all the other each rivers passageway tops are closed, form closed one-way rivers passageway).
Furthermore, modified filter materials are paved in the multistage serial baffling deep bed filter; the method comprises the steps of paving chitosan-starch-acetic acid modified fluidized bed plastic light filter materials (with the particle size of 10-30 mm) in a first-stage baffling deep bed filter, paving chitosan-starch-acetic acid modified ceramsite (with the particle size of 2-5 mm) in a second-stage baffling deep bed filter, paving chitosan-starch-acetic acid modified volcanic rock filter materials (with the particle size of 3-5 mm) in a third-stage baffling deep bed filter, wherein the paving thickness of each filter material is 1.0m, enabling water flow to flow through 6 baffling sections, and enabling the total flow to be 6 m. The water inlet at the water inlet end of the baffling deep bed filter tank is of a down-flow type, the water outlet at the water outlet end is of an up-flow type, and the hydraulic retention time is 6 hours.
Referring to fig. 3, a bed body support is arranged in the fault seepage reoxygenation nitrification bed, more than one drip pipe is arranged on the support at the uppermost end of the bed body, and modified filter materials are respectively paved on the rest supports and are further staggered and divided into an air fault reoxygenation area among the filter materials and a filter material filling seepage denitrification area.
Furthermore, the height of the fault seepage reoxygenation nitrification bed is 1.0m, which is the same as the laying height of the filter material of the upstream baffling deep bed filter tank, the chitosan-starch-acetic acid modified fluidized bed plastic light filter material (with the particle size of 10-30 mm) is laid on the nitrification bed body, the filter material laying adopts a fault mode, the laying thickness of each layer of filter material is 5cm, and the distance between each layer and the upper layer is 5 cm.
The chitosan-starch-acetic acid modified filter material comprises the following components: (1) dissolving chitosan and water-soluble starch powder with 1% glacial acetic acid solution, mixing polyethylene glycol, and dispersing into uniform clear membrane solution, wherein the concentrations of chitosan, starch and polyethylene glycol are all 1%; (2) and (3) uniformly coating the membrane liquid on a filter material, rinsing the filter material to be neutral by using distilled water, and drying the filter material for later use. The filter material adopted in the embodiment comprises a fluidized bed plastic light filter material, ceramsite and volcanic rock.
The water treatment method and the recycling:
1) domestication treatment of a baffling deep bed filter tank system: sprinkling a fish manure and residual bait mixed solution in the culture pond into the baffling deep-bed filter tank system; then sequentially inoculating anaerobic ammonium oxidation bacteria, nitrifying bacteria and aerobic denitrifying microorganisms, and culturing for 1-5 d; adding polyacrylamide and common antibiotics for aquaculture into the filter tank, and then domesticating for 3-14 days to form a stable-running and impact-resistant nitrification-aerobic denitrification biological membrane on the surface of the modified filter material;
2) fault seepage reoxygenation nitrifying bed domestication: preparing nitrobacteria and aerobic denitrification microorganism suspension in advance, culturing for 1-5 days, spraying the microorganism suspension into the nitrification bed every day through a dripping pipe, culturing for 3-14 days, and further forming a nitrification-aerobic denitrification biological membrane which is stable in operation and resistant to impact on the surface of the modified filter material;
3) the culture water flows into each closed one-way water flow passage in the system through a water inlet of the baffling deep bed filter system, the water flow passes through multi-stage baffling, the total flow reaches 6m, the total hydraulic retention time is 6h, and organic matters, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen in the water are removed. Then, the outlet water of the baffling deep bed filter tank flows into a water inlet of a fault seepage reoxygenation nitrification bed through a pipeline, and is subjected to the alternate action of an air fault reoxygenation area and a filter material filling seepage denitrification area among a plurality of layers of filter materials in the bed body, so that the dissolved oxygen in water is increased, organic matters, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen are further removed, and then the obtained regenerated culture water is sent to a culture pond.
The pH value is controlled within the range of 7.8-8.2 when the feed is conveyed into a culture pond, the ammonia nitrogen content is less than 0.3mg/L, the nitrite content is less than 0.1mg/L, and the dissolved oxygen content is more than 4.0mg/L, so that the growth requirement of aquaculture animals is met. After the bait adding amount is increased in the later period of cultivation, the water quality of the pond water is deteriorated, and the water quality index does not meet the standard for a long time, the cultivation water is introduced into the device again, flows through the baffling deep bed filter system and the fault seepage reoxygenation nitrification bed in sequence, and is subjected to strengthening treatment again, so that the cultivation water can be recycled; meanwhile, the total hydraulic retention time is increased by 1-2 times, and the circulating water treatment effect is improved.
The content of suspended solids in the feces residual bait suspension of the culture pond splashed in the step 1) is controlled to be 5.0 g/L.
The nitrifying-aerobic denitrifying bacteria are bacillus, serratia, alcaligenes and acinetobacter, the bacillus, serratia, alcaligenes and acinetobacter are re-suspended by using a phosphate buffer solution (pH 7.0) with the concentration of 0.2mol/L, and the contents of the bacillus, serratia, alcaligenes and acinetobacter in the re-suspension are all 0.25g/L, so that nitrifying-aerobic denitrifying bacteria liquid is obtained.
Wherein, the inoculation amount of the anaerobic ammonium oxidation bacteria, the nitrifying bacteria and the aerobic denitrification microorganisms in the step 1) is 1.0g/m3(ii) a The inoculation amount of the nitrifying bacteria and the aerobic denitrifying microorganisms in the step 2) is 1.0g/m3。
In the step 1), the adding concentration of polyacrylamide is 2.0ppm, and the adding concentration of antibiotics is 20.0 mug/L; wherein, common antibiotics for aquaculture are sulfadiazine, oxytetracycline, florfenicol and ofloxacin.
Example 2
And carrying out advanced treatment and recycling on tail water in a certain tilapia culture pond.
Referring to fig. 2-a, the device comprises a baffling deep bed filter system and a fault seepage reoxygenation nitrification bed, wherein a water outlet of the baffling deep bed filter system is connected with a water inlet of the fault seepage reoxygenation nitrification bed through a pipeline, the baffling deep bed filter system is composed of an independent baffling deep bed filter, a plurality of baffles (5 baffles are arranged in the embodiment) are inserted into the filter, the baffles are equidistantly laid in the middle of a water inlet section and a water outlet section of a single filter system to form a baffle type multi-stage baffling deep bed filter system, and the upper ends of two sides of the baffling deep bed filter system are respectively provided with a water inlet and a water outlet.
The baffle baffling single filter tank is inserted between the pool wall of two baffles of head and the tail and deep bed baffling filtering pond of establishing in, and form the rivers passageway between two adjacent baffles, and each rivers passageway feeds through in proper order, wherein the first rivers passageway of deep bed filtering pond system of baffling is open for the top with tail rivers passageway, all the other rivers passageway tops are sealed (this embodiment forms 6 altogether, head and the tail top is open, all the other each rivers passageway tops are sealed, form and seal one-way rivers passageway, the baffle top of even number is equipped with the passageway that can make the water flow through simultaneously).
Furthermore, chitosan-starch-acetic acid modified ceramsite filter materials (with the particle size of 2-5 mm) are laid in the baffle single-filter tank, the laying thickness of each filter material is 0.5m, water flows through 6 baffle sections, and the total flow is 3 m. The water inlet at the water inlet end of the baffling deep bed filter tank is of a down-flow type, the water outlet at the water outlet end is of an up-flow type, and the hydraulic retention time is 2 hours.
Referring to fig. 3, the fault seepage reoxygenation nitrification bed is fixedly supported by a bed body support, a weeping pipe is arranged at the upper end and consists of an air fault reoxygenation area among filter materials and a filter material filling seepage denitrification area, and modified filter materials are laid in the filter material filling seepage denitrification area.
Furthermore, the height of the fault seepage reoxygenation nitrification bed is 0.5m, which is the same as the laying height of the filter material of the upstream baffling deep bed filter tank, the chitosan-starch-acetic acid modified fluidized bed plastic light filter material (with the particle size of 10-30 mm) is laid on the nitrification bed body, the filter material laying adopts a fault mode, the laying thickness of each layer of filter material is 5cm, and the distance between each layer and the upper layer is 5 cm.
The chitosan-starch-acetic acid modified filter material comprises the following components: (1) dissolving chitosan and water soluble starch powder with 1.0% glacial acetic acid solution, mixing polyethylene glycol, and dispersing into uniform clear membrane solution, wherein the concentrations of chitosan, starch and polyethylene glycol are all 2.0%; (2) and (3) uniformly coating the membrane liquid on a filter material, rinsing the filter material to be neutral by using distilled water, and drying the filter material for later use. The filter material used in this embodiment includes a fluidized bed plastic lightweight filter material and ceramsite.
The water treatment method and the recycling:
1) domestication treatment of a baffling deep bed filter tank system: sprinkling a fish manure and residual bait mixed solution in the culture pond into the baffling deep-bed filter tank system; then sequentially inoculating anaerobic ammonium oxidation bacteria, nitrifying bacteria and aerobic denitrifying microorganisms, and culturing for 1-5 d; adding polyacrylamide and common antibiotics for aquaculture into the filter tank, and then domesticating for 3-14 days to form a stable-running and impact-resistant nitrification-aerobic denitrification biological membrane on the surface of the modified filter material;
2) fault seepage reoxygenation nitrifying bed domestication: preparing nitrobacteria and aerobic denitrification microorganism suspension in advance, culturing for 1-5 days, spraying the microorganism suspension into the nitrification bed every day through a dripping pipe, culturing for 3-14 days, and further forming a nitrification-aerobic denitrification biological membrane which is stable in operation and resistant to impact on the surface of the modified filter material;
3) the culture water flows into each closed one-way water flow passage in the system through a water inlet of the baffling deep bed filter system, the water flow passes through multi-stage baffling, the total flow reaches 3m, the total hydraulic retention time is 2h, and organic matters, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen in the water are removed. Then, the outlet water of the baffling deep bed filter tank flows into a water inlet of a fault seepage reoxygenation nitrification bed through a pipeline, and is subjected to the alternate action of an air fault reoxygenation area and a filter material filling seepage denitrification area among a plurality of layers of filter materials in the bed body, so that the dissolved oxygen in water is increased, organic matters, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen are further removed, and then the obtained regenerated culture water is sent to a culture pond.
The pH value is controlled within the range of 7.8-8.2 when the feed is conveyed into a culture pond, the ammonia nitrogen content is less than 0.3mg/L, the nitrite content is less than 0.1mg/L, and the dissolved oxygen content is more than 4.0mg/L, so that the growth requirement of aquaculture animals is met. After the bait adding amount is increased in the later period of cultivation, the water quality of the pond water is deteriorated, and the water quality index does not meet the standard for a long time, the cultivation water is introduced into the device again, flows through the baffling deep bed filter system and the fault seepage reoxygenation nitrification bed in sequence, and is subjected to strengthening treatment again, so that the cultivation water can be recycled; meanwhile, the total hydraulic retention time is increased by 1-2 times, and the circulating water treatment effect is improved.
The content of suspended solids in the fish manure residual bait suspension splashed in the step 1) in the culture pond is controlled to be 2.0 g/L.
The nitrifying-aerobic denitrifying bacteria are bacillus, serratia, alcaligenes and acinetobacter, the bacillus, serratia, alcaligenes and acinetobacter are re-suspended by using a phosphate buffer solution (pH 7.0) with the concentration of 0.2mol/L, and the contents of the bacillus, serratia, alcaligenes and acinetobacter in the re-suspension are all 0.25g/L, so that nitrifying-aerobic denitrifying bacteria liquid is obtained.
Wherein, the inoculation amount of the anaerobic ammonium oxidation bacteria, the nitrifying bacteria and the aerobic denitrification microorganisms in the step 1) is 1.0g/m3(ii) a The inoculation amount of the nitrifying bacteria and the aerobic denitrifying microorganisms in the step 2) is 1.0g/m3。
In the step 1), the adding concentration of polyacrylamide is 0.5ppm, and the adding concentration of antibiotics is 10.0 mug/L; wherein, common antibiotics for aquaculture are sulfadiazine, oxytetracycline, florfenicol and ofloxacin.
Example 3
And carrying out advanced treatment and recycling on tail water of a certain shrimp and shellfish polyculture pond system.
Referring to fig. 2-b, the device comprises a baffling deep bed filter system and a fault seepage reoxygenation nitrification bed, wherein a water outlet of the baffling deep bed filter system is connected with a water inlet of the fault seepage reoxygenation nitrification bed through a pipeline, the baffling deep bed filter system is composed of an independent baffling deep bed filter, a plurality of baffles (5 baffles are arranged in the embodiment) are inserted into the filter, and the baffles are laid in the middle of a water inlet section and a water outlet section of the single filter system at equal intervals to form a baffle type multi-stage baffling deep bed filter system; the lower ends of the two sides of the baffling deep bed filter system are respectively provided with a water inlet and a water outlet.
The baffle baffling single filter tank is inserted between the pool wall of two baffles of head and the tail and deep bed baffling filtering pond of establishing in, and form the rivers passageway between two adjacent baffles, and each rivers passageway feeds through in proper order, wherein the first rivers passageway of deep bed filtering pond system of baffling is open for the top with tail rivers passageway, all the other rivers passageway tops are sealed (this embodiment forms 6 altogether, head and the tail top is open, all the other each rivers passageway tops are sealed, form and seal one-way rivers passageway, the baffle top of even number is equipped with the passageway that can make the water flow through simultaneously).
Furthermore, chitosan-starch-acetic acid modified volcanic filter materials (with the particle size of 3-5 mm) are laid in the baffle single-filter tank, the laying thickness of each filter material is 1.0m, water flows through 6 baffle sections, and the total flow is 6 m. The water inlet at the water inlet end of the baffling deep bed filter tank is of an up-flow type, the water outlet at the water outlet end is of a down-flow type, and the hydraulic retention time is 5 hours.
Referring to fig. 3, the fault seepage reoxygenation nitrification bed is fixedly supported by a bed body support, a weeping pipe is arranged at the upper end and consists of an air fault reoxygenation area among filter materials and a filter material filling seepage denitrification area, and modified filter materials are laid in the filter material filling seepage denitrification area.
Furthermore, the height of the fault seepage reoxygenation nitrification bed is 1.0m, which is the same as the laying height of the filter material of the upstream baffling deep bed filter tank, the bed body of the nitrification bed is laid with chitosan-starch-acetic acid modified ceramsite filter material (with the particle size of 2-5 mm), the filter material laying adopts a fault mode, the laying thickness of each layer of filter material is 5cm, and the distance between each layer of filter material and the upper layer of filter material is 5 cm.
The preparation of the chitosan-starch-acetic acid modified filter material comprises the following steps: (1) dissolving chitosan and water soluble starch powder with 1.0% glacial acetic acid solution, mixing polyethylene glycol, and dispersing into uniform clear membrane solution, wherein the concentrations of chitosan, starch and polyethylene glycol are all 2.0%; (2) and (3) uniformly coating the membrane liquid on a filter material, rinsing the filter material to be neutral by using distilled water, and drying the filter material for later use. The filter material used in this embodiment includes volcanic rock and ceramsite.
The water treatment method and the recycling:
1) domestication treatment of a baffling deep bed filter tank system: sprinkling a mixed solution of excrement and residual bait of the culture pond into the baffling deep bed filter system; then sequentially inoculating anaerobic ammonium oxidation bacteria, nitrifying bacteria and aerobic denitrifying microorganisms, and culturing for 1-5 d; adding polyacrylamide and common antibiotics for aquaculture into the filter tank, and then domesticating for 3-14 days to form a stable-running and impact-resistant nitrification-aerobic denitrification biological membrane on the surface of the modified filter material;
2) fault seepage reoxygenation nitrifying bed domestication: preparing nitrobacteria and aerobic denitrification microorganism suspension in advance, culturing for 1-5 days, spraying the microorganism suspension into the nitrification bed every day through a dripping pipe, culturing for 3-14 days, and further forming a nitrification-aerobic denitrification biological membrane which is stable in operation and resistant to impact on the surface of the modified filter material;
3) the culture water flows into each closed one-way water flow passage in the system through a water inlet of the baffling deep bed filter system, the water flow passes through multi-stage baffling, the total flow reaches 6m, and the total hydraulic retention time is 5h, so that organic matters, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen in the water can be removed. Then, the outlet water of the baffling deep bed filter tank flows into a water inlet of a fault seepage reoxygenation nitrification bed through a pipeline, and is subjected to the alternate action of an air fault reoxygenation area and a filter material filling seepage denitrification area among a plurality of layers of filter materials in the bed body, so that the dissolved oxygen in water is increased, organic matters, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen are further removed, and then the obtained regenerated culture water is sent to a culture pond.
The pH value is controlled within the range of 7.8-8.2 when the feed is conveyed into a culture pond, the ammonia nitrogen content is less than 0.3mg/L, the nitrite content is less than 0.1mg/L, and the dissolved oxygen content is more than 4.0mg/L, so that the growth requirement of aquaculture animals is met. After the bait adding amount is increased in the later period of cultivation, the water quality of the pond water is deteriorated, and the water quality index does not meet the standard for a long time, the cultivation water is introduced into the device again, flows through the baffling deep bed filter system and the fault seepage reoxygenation nitrification bed in sequence, and is subjected to strengthening treatment again, so that the cultivation water can be recycled; meanwhile, the total hydraulic retention time is increased by 1-2 times, and the circulating water treatment effect is improved.
The content of suspended solids in the fish manure residual bait suspension splashed in the step 1) in the culture pond is controlled to be 1.0 g/L.
The nitrifying-aerobic denitrifying bacteria are bacillus, serratia, alcaligenes and acinetobacter, the bacillus, serratia, alcaligenes and acinetobacter are re-suspended by using a phosphate buffer solution (pH 7.0) with the concentration of 0.2mol/L, and the contents of the bacillus, serratia, alcaligenes and acinetobacter in the re-suspension are all 1.0g/L, so that nitrifying-aerobic denitrifying bacteria liquid is obtained.
Wherein, the inoculation amount of the anaerobic ammonium oxidation bacteria, the nitrifying bacteria and the aerobic denitrification microorganisms in the step 1) is 1.0g/m3(ii) a The inoculation amount of the nitrifying bacteria and the aerobic denitrifying microorganisms in the step 2) is 1.0g/m3。
In the step 1), the adding concentration of polyacrylamide is 1.0ppm, and the adding concentration of antibiotics is 10.0 mug/L; wherein, common antibiotics for aquaculture are sulfadiazine, oxytetracycline, florfenicol and ofloxacin.
Example 4
Deep treatment and recycling of tail water of a mariculture base in the Bohai sea area of the Bohai.
Referring to fig. 2-a, the device comprises a baffling deep bed filter system and a fault seepage reoxygenation nitrification bed, wherein a water outlet of the baffling deep bed filter system is connected with a water inlet of the fault seepage reoxygenation nitrification bed through a pipeline, the baffling deep bed filter system is composed of an independent baffling deep bed filter, a plurality of baffles (5 baffles are arranged in the embodiment) are inserted into the filter, and the baffles are laid in the middle of a water inlet section and a water outlet section of a single filter system at equal intervals to form a baffle type multi-stage baffling deep bed filter system; the lower ends of the two sides of the baffling deep bed filter system are respectively provided with a water inlet and a water outlet.
The baffle baffling single filter tank is inserted between the pool wall of two baffles of head and the tail and deep bed baffling filtering pond of establishing in, and form the rivers passageway between two adjacent baffles, and each rivers passageway feeds through in proper order, wherein the first rivers passageway of deep bed filtering pond system of baffling is open for the top with tail rivers passageway, all the other rivers passageway tops are sealed (this embodiment forms 6 altogether, head and the tail top is open, all the other each rivers passageway tops are sealed, form and seal one-way rivers passageway, the baffle top of even number is equipped with the passageway that can make the water flow through simultaneously).
Furthermore, chitosan-starch-acetic acid modified fiber ball filter materials (with the particle size of 20-40 mm) are laid in the baffle single filter, the laying thickness of each filter material is 2.5m, water flows through 6 baffle sections, and the total flow is 15 m. The water inlet at the water inlet end of the baffling deep bed filter tank is of a down-flow type, the water outlet at the water outlet end is of an up-flow type, and the hydraulic retention time is 24 hours.
Referring to fig. 3, the fault seepage reoxygenation nitrification bed is fixedly supported by a bed body support, a weeping pipe is arranged at the upper end and consists of an air fault reoxygenation area among filter materials and a filter material filling seepage denitrification area, and modified filter materials are laid in the filter material filling seepage denitrification area.
Furthermore, the height of the fault seepage reoxygenation nitrification bed is 1.0m, which is the same as the laying height of the filter material of the upstream baffling deep bed filter tank, the bed body of the nitrification bed is laid with the polysaccharide-starch-acetic acid modified fiber ball filter material (with the particle size of 20-40 mm), the filter material laying adopts a fault mode, the laying thickness of each layer of filter material is 5cm, and the distance between each layer and the upper layer is 5 cm.
The preparation of the chitosan-starch-acetic acid modified filter material comprises the following steps: (1) dissolving chitosan and water soluble starch powder with 1.0% glacial acetic acid solution, mixing polyethylene glycol, and dispersing into uniform clear membrane solution, wherein the concentrations of chitosan, starch and polyethylene glycol are all 3.0%; (2) and (3) uniformly coating the membrane liquid on a filter material, rinsing the filter material to be neutral by using distilled water, and drying the filter material for later use. The filter material adopted in the embodiment is a fiber ball filter material.
The water treatment method and the recycling:
1) domestication treatment of a baffling deep bed filter tank system: sprinkling a fish manure and residual bait mixed solution in the culture pond into the baffling deep-bed filter tank system; then sequentially inoculating anaerobic ammonium oxidation bacteria, nitrifying bacteria and aerobic denitrifying microorganisms, and culturing for 1-5 d; adding polyacrylamide and common antibiotics for aquaculture into the filter tank, and then domesticating for 3-14 days to form a stable-running and impact-resistant nitrification-aerobic denitrification biological membrane on the surface of the modified filter material;
2) fault seepage reoxygenation nitrifying bed domestication: preparing nitrobacteria and aerobic denitrification microorganism suspension in advance, culturing for 1-5 days, spraying the microorganism suspension into the nitrification bed every day through a dripping pipe, culturing for 3-14 days, and further forming a nitrification-aerobic denitrification biological membrane which is stable in operation and resistant to impact on the surface of the modified filter material;
3) the culture water flows into each closed one-way water flow passage in the system through a water inlet of the baffling deep bed filter system, the water flow passes through multi-stage baffling, the total flow reaches 15m, the total hydraulic retention time is 24h, and organic matters, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen in the water are removed. Then, the outlet water of the baffling deep bed filter tank flows into a water inlet of a fault seepage reoxygenation nitrification bed through a pipeline, and is subjected to the alternate action of an air fault reoxygenation area and a filter material filling seepage denitrification area among a plurality of layers of filter materials in the bed body, so that the dissolved oxygen in water is increased, organic matters, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen are further removed, and then the obtained regenerated culture water is sent to a culture pond.
The pH value is controlled within the range of 7.8-8.2 when the feed is conveyed into a culture pond, the ammonia nitrogen content is less than 0.3mg/L, the nitrite content is less than 0.1mg/L, and the dissolved oxygen content is more than 4.0mg/L, so that the growth requirement of aquaculture animals is met. After the bait adding amount is increased in the later period of cultivation, the water quality of the pond water is deteriorated, and the water quality index does not meet the standard for a long time, the cultivation water is introduced into the device again, flows through the baffling deep bed filter system and the fault seepage reoxygenation nitrification bed in sequence, and is subjected to strengthening treatment again, so that the cultivation water can be recycled; meanwhile, the total hydraulic retention time is increased by 1-2 times, and the circulating water treatment effect is improved.
The content of suspended solids in the fish manure residual bait suspension splashed in the step 1) is controlled to be 10.0 g/L.
The nitrifying-aerobic denitrifying bacteria are bacillus, serratia, alcaligenes and acinetobacter, the bacillus, serratia, alcaligenes and acinetobacter are re-suspended by using a phosphate buffer solution (pH 7.0) with the concentration of 0.2mol/L, and the contents of the bacillus, serratia, alcaligenes and acinetobacter in the re-suspension are all 1.0g/L, so that nitrifying-aerobic denitrifying bacteria liquid is obtained.
Wherein, the inoculation amount of the anaerobic ammonium oxidation bacteria, the nitrifying bacteria and the aerobic denitrification microorganisms in the step 1) is 1.0g/m3(ii) a The inoculation amount of the nitrifying bacteria and the aerobic denitrifying microorganisms in the step 2) is 1.0g/m3。
In the step 1), the adding concentration of polyacrylamide is 4.0ppm, and the adding concentration of antibiotics is 20.0 mug/L; wherein, common antibiotics for aquaculture are sulfadiazine, oxytetracycline, florfenicol and ofloxacin.
Claims (6)
1. An aquaculture water treatment and cyclic utilization device which characterized in that: the device comprises a baffling deep bed filter system and a fault seepage reoxygenation nitrification bed, wherein a water outlet of the baffling deep bed filter system is connected with a water inlet of the fault seepage reoxygenation nitrification bed through a pipeline, the baffling deep bed filter system consists of at least one independent baffling deep bed filter, and a water inlet and a water outlet are respectively arranged at the same height on two sides of the baffling deep bed filter system;
the deep baffling bed filter system is characterized in that a plurality of independent deep baffling bed filters are sequentially communicated in series through pipelines to form a series multi-stage deep baffling bed filter system, and a baffle is inserted into each independent deep baffling bed filter;
or the baffling deep bed filter system is an independent baffling deep bed filter, and a plurality of baffles are inserted in the deep bed filter system to form a baffle type multi-stage baffling deep bed filter system;
a baffle inserted in the deep baffling bed filter system and the wall of the deep baffling bed filter or between the baffle and the baffle form a water flow passage, and all the water flow passages are sequentially communicated, wherein the first water flow passage and the last water flow passage of the deep baffling bed filter system are open at the top ends, the top ends of the other water flow passages are closed, and modified filter materials are laid in each filter of the deep baffling bed filter system;
the modified filter material is formed by coating chitosan-starch-acetic acid mixed membrane liquid on the surface of the filter material; wherein the mixed membrane solution is prepared by dissolving chitosan and water-soluble starch powder in 1-5% glacial acetic acid solution and mixing polyethylene glycol, and the concentrations of the chitosan, the starch and the polyethylene glycol are all 1-5%.
2. The aquaculture water treatment and recycling device of claim 1, wherein: a bed body support is arranged in the fault seepage reoxygenation nitrification bed, more than one drip pipe is arranged at the uppermost support of the bed body, and modified filter materials are respectively paved on the rest supports and are further staggered and divided into an air fault reoxygenation area and a filter material filling seepage denitrification area between the filter materials; the laying thickness of each layer of modified filter material is 5-10 cm, and the distance between each layer and the top is 5-10 cm.
3. A method of treating and circulating aquaculture water using the apparatus of claim 1, wherein said method comprises the steps of:
1) domestication treatment of a baffling deep bed filter tank system: sprinkling a mixed solution of excrement and residual bait of the culture pond into the baffling deep bed filter system; then sequentially inoculating anaerobic ammonium oxidation bacteria, nitrifying bacteria and aerobic denitrifying microorganisms, and culturing for 1-5 d; adding polyacrylamide and common antibiotics for aquaculture into the filter tank, and then domesticating for 3-14 days to form a stable-running and impact-resistant nitrification-aerobic denitrification biological membrane on the surface of the modified filter material;
2) fault seepage reoxygenation nitrifying bed domestication: preparing nitrobacteria and aerobic denitrification microorganism suspension in advance, culturing for 1-5 days, spraying the microorganism suspension into the nitrification bed every day through a dripping pipe, culturing for 3-14 days, and further forming a nitrification-aerobic denitrification biological membrane which is stable in operation and resistant to impact on the surface of the modified filter material;
3) aquaculture water flows into each closed one-way water flow passage in the system through a water inlet of a baffling deep bed filter system, water flows through multi-stage baffling, the total flow path reaches 3-15 m, the total hydraulic retention time is 2-24 h, so that organic matters, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen in the aquaculture water are removed, then, the outlet water of the baffling deep bed filter enters from a water inlet of a cross-flow seepage flow reoxygenation bed through a pipeline, dissolved oxygen in the aquaculture water is increased through the alternating action of an air cross-flow reoxygenation region and a filter material filling seepage denitrification region among a plurality of layers of filter materials in a bed body, so that the organic matters, the ammonia nitrogen, the nitrite nitrogen and the nitrate nitrogen are further removed, the obtained regenerated aquaculture water is sent into the aquaculture tank, the aquaculture water is introduced into the device again, sequentially flows through the baffling deep bed filter system and the cross-flow seepage reoxygenation bed, and the aquaculture water is, so that the waste water can be recycled.
4. A method for treating and recycling aquaculture water using a device according to claim 3, wherein said device comprises: and (3) controlling the content of suspended solids in the fish manure residual bait suspension splashed in the step 1) to be 1-10 g/L.
5. The method for treating and recycling aquaculture water using the apparatus of claim 4, wherein said apparatus further comprises: wherein, the stepsThe inoculation amount of the anaerobic ammonium oxidation bacteria, the nitrifying bacteria and the aerobic denitrification microorganisms in the step 1) is 1.0g/m3(ii) a The inoculation amount of the nitrifying bacteria and the aerobic denitrifying microorganisms in the step 2) is 1.0g/m3。
6. The method for treating and recycling aquaculture water using the apparatus of claim 5, wherein said apparatus further comprises: in the step 1), the addition concentration of polyacrylamide is 0.01-10 ppm, and the addition concentration of antibiotics is 10-100 mug/L; wherein, the common antibiotics for aquaculture are sulfadiazine, oxytetracycline, florfenicol or ofloxacin.
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