CN105645572A - Low-cost method for treating ammonia nitrogen and nitrites in pond culture water body - Google Patents
Low-cost method for treating ammonia nitrogen and nitrites in pond culture water body Download PDFInfo
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- CN105645572A CN105645572A CN201610015164.0A CN201610015164A CN105645572A CN 105645572 A CN105645572 A CN 105645572A CN 201610015164 A CN201610015164 A CN 201610015164A CN 105645572 A CN105645572 A CN 105645572A
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- filter material
- net cage
- ammonia nitrogen
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- nitrite
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 42
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 26
- 150000002826 nitrites Chemical class 0.000 title abstract 2
- 239000000463 material Substances 0.000 claims abstract description 63
- 238000005273 aeration Methods 0.000 claims abstract description 23
- -1 polyethylene Polymers 0.000 claims abstract description 17
- 229920000573 polyethylene Polymers 0.000 claims abstract description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000001301 oxygen Substances 0.000 claims abstract description 12
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 12
- 239000004698 Polyethylene Substances 0.000 claims abstract description 9
- 239000004743 Polypropylene Substances 0.000 claims abstract description 8
- 229920001155 polypropylene Polymers 0.000 claims abstract description 6
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 18
- 239000000706 filtrate Substances 0.000 claims description 7
- 238000005276 aerator Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000004880 explosion Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 10
- 238000009360 aquaculture Methods 0.000 abstract description 3
- 241000238557 Decapoda Species 0.000 description 15
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 12
- 241000251468 Actinopterygii Species 0.000 description 10
- 238000009395 breeding Methods 0.000 description 10
- 230000001488 breeding effect Effects 0.000 description 10
- 241001465754 Metazoa Species 0.000 description 7
- 241000108664 Nitrobacteria Species 0.000 description 6
- 229910021529 ammonia Inorganic materials 0.000 description 6
- 108090000623 proteins and genes Proteins 0.000 description 6
- 102000004169 proteins and genes Human genes 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- 230000001546 nitrifying effect Effects 0.000 description 5
- 229910002651 NO3 Inorganic materials 0.000 description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 4
- 230000002354 daily effect Effects 0.000 description 4
- 229920001903 high density polyethylene Polymers 0.000 description 4
- 229940063583 high-density polyethylene Drugs 0.000 description 4
- 239000004700 high-density polyethylene Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 241000238553 Litopenaeus vannamei Species 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 244000144974 aquaculture Species 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 238000012258 culturing Methods 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 231100000518 lethal Toxicity 0.000 description 2
- 230000001665 lethal effect Effects 0.000 description 2
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 241000283690 Bos taurus Species 0.000 description 1
- 235000019750 Crude protein Nutrition 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 108090000913 Nitrate Reductases Proteins 0.000 description 1
- 241001494479 Pecora Species 0.000 description 1
- 241001417871 Silurus asotus Species 0.000 description 1
- 208000036142 Viral infection Diseases 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 241001148470 aerobic bacillus Species 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 231100000739 chronic poisoning Toxicity 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 230000001079 digestive effect Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 210000001035 gastrointestinal tract Anatomy 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000000968 intestinal effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 231100000636 lethal dose Toxicity 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007102 metabolic function Effects 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- 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
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
-
- 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
- C02F3/02—Aerobic processes
-
- 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
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Microbiology (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
The invention relates to a method for removing ammonia nitrogen and nitrites in a pond culture water body in a nitrification process, belonging to the technical field of aquiculture. A filter material mesh cage is put in the pond, the periphery of the filter material mesh cage is enclosed by polyethylene meshes, a polypropylene filter material is put in the filter material mesh cage, the bottom of the filter material mesh cage is provided with an aeration tray, and the filter material mesh cage is fixed to the bottom of the pond through piles. The simple method of putting the filter material in the culture pond culture water is adopted, thereby saving the external building cost and water circulation cost. The inside of the mesh cage is moderately aerated, thereby keeping the sufficient communication between the filter material and water, and increasing the dissolved oxygen in the culture water body.
Description
Technical field
The present invention relates to technical field of aquaculture, specifically, be that a kind of nitrifying process of applying removes the mode of ammonia nitrogen and nitrite in Aquacultural water.
Background technology
The digestive tract of fish (shrimp) is comparatively short, and the intestinal of such as Silurus asotus fish and the ratio of body length are 2.0-2.5, and cattle and sheep is 20-30 times, and people's is 3-4 times. So, food residence time in fish body is comparatively short, and the abilities of digestive and absorption of fish is relatively low. Separately, the protein content 60-70% of fish body itself, fish consumes protein and produces energy, and mostly other animal is to consume carbohydrate and fat, fish body demand 2-3 times of other animal to protein. Therefore, the aquatic feeds of high protein content (25-40%) that need to throw something and feed in actual production, but only the protein of throwing something and feeding of about 20-30% is converted adult fish and obtains thing, and major part can not be utilized and be present in breeding water body. In protein, nitrogen content is about 6.25%. Ammonia nitrogen is the final metabolite of protein. In breeding process, the nitrogen in the protein in unemployed bait eventually changes into ammonia nitrogen. The excretion of cultivated animals also can produce ammonia nitrogen. Therefore, breeding water body often there will be the accumulation of ammonia nitrogen. The existence of ammonia nitrogen adds fish and shrimp to the consumption of oxygen in breeding water body, the ability destroying gill tissue, reduction blood conveying oxygen. That we record typically by Na Shi method or salicylic acid method is total ammonia nitrogen (Totalammoniumnitrogen, TAN), wraps ion ammonia and non-ionic ammonia, and wherein that cultivated animals is virose is non-ionic ammonia. In China's water quality standard for fishery, the concentration of non-ionic ammonia must not exceed 1mg/L, and the lethal dose of many animals is even also low. Even if being all likely to far below lethal limit amount produce strong influence. The ratio that non-ionic ammonia accounts in total ammonia nitrogen is affected by conditions such as the temperature in water body, pH and salinity. Ammonia nitrogen concentration is the water quality index needing strict control in breeding process.
The main source one of culturing pool nitrite is that ammonia nitrogen in water produces through " Nitrosomas " biological oxidation, and two is that nitrate in water produces through the biological reducing effect of " nitrate reductase bacterium ". The nitrite of low concentration often can make fish and shrimp resistance reduce, and makes the oxygen carrying capacity of blood lose gradually and causes chronic poisoning, and the metabolic function making some organ is inconspicuous, causes organisms force failure. Additionally containing nitrite in water body, the lethasl concentration of ammonia can be made to reduce. Nitrous acid concentration is also the water quality index needing strict control in breeding process.
Ammonia nitrogen and nitrite in Aquacultural water can be finally converted into nitrate by nitrifying process.Nitrate is relatively low to the toxicity of cultivated animals. The antibacterial participating in nitrifying process is referred to as nitrobacteria. Nitrobacteria is when attachment, and the efficiency of Nitrification is higher than floating state. Therefore, in order to strengthen nitrifying process, adherance can be provided for the growth of nitrobacteria in actual process, be also called biofiltration material (abbreviation filter material). Zeolite, limestone etc. can provide attachment basal plane for nitrobacteria. High density polyethylene (HDPE) (HighDensityPolyethylene, referred to as " HDPE ") it is a kind of degree of crystallinity thermoplastic resin high, nonpolar, the biological filter material made has the advantages such as proportion is little, plasticity strong, unit volume adherance area is big.
For the problems referred to above, the mode that the present invention proposes a kind of Aquacultural water ammonia nitrogen, nitrite is removed, emphasis solves the accumulation problem of the ammonia nitrogen in pond culture and nitrite.
Summary of the invention
It is an object of the invention to for deficiency of the prior art, it is provided that a kind of nitrifying process of applying removes the mode of ammonia nitrogen and nitrite in Aquacultural water.
For achieving the above object, the present invention adopts the technical scheme that: a kind of remove the method for ammonia nitrogen and nitrite in Aquacultural water, described pond is put into filter material net cage, the surrounding of filter material net cage is surrounded by polyethylene mesh sheet, polypropylene filter material is put in filter material net cage, being provided with gas explosion dish bottom filter material net cage, filter material net cage is fixed on pond bottom by stake.
Described pond configures 4m according to every mu3Filtrate.
Described filter material net cage polythene strip surrounds the net cage of long 2.5m, wide 2.5m, high 1.2m, and polythene strip is 4 orders.
In described filter material net cage, the filling rate of filtrate is 53%.
The external diameter of described polypropylene filter material is 5-7cm, and specific surface area is more than 300m2/m3, porosity is more than 95%, and proportion is less than 1.0.
Described filter material net cage both sides are placed with drives the waterwheel aerator that flow path direction is contrary, it is ensured that in water body, dissolved oxygen is more than 6mg/L.
Filter material is carried out aeration in 15 days by described filter material net cage before manufacture in advance.
Described pond is the standardization cultivating pool of long 40m, wide 150m, pond is placed 9 filter material net cages, the long 2.5m of filter material net cage, wide 2.5m, high 1.2m, the surrounding of filter material net cage is surrounded by the polythene strip of 4 orders, and putting into particle diameter in filter material net cage be 7cm, proportion is 1.2g/cm, specific surface area 350m2/m3Polypropylene filter material, filter material filling rate is 53%, and being provided with power bottom filter material net cage is 2-2.5KW/ha aeration plate, four angles of filter material net cage by stainless steel insert pond bottom fix.
The invention has the advantages that:
The present invention adopts very succinct method to be put in cultivating pool aquaculture water by filter material, has saved cost and the water cycle cost of external structures; Appropriateness aeration can keep fully exchanging of filter material and water in net cage, it is possible to the dissolved oxygen in increase breeding water body.
Accompanying drawing explanation
Accompanying drawing 1 is cultivating pool plane figure.
Accompanying drawing 2 is cultivating pool filter material net cage plane graph.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention provided by the invention is elaborated.
The accompanying drawing labelling related in accompanying drawing and ingredient are as follows:
1 filter material net cage
2 waterwheel aerators
11 aeration plates
12 filter materials
13
14 polyethylene mesh sheet
Before actual production, cultivating pool configures 4m according to every mu3Filtrate. Concrete fixed form is: surround the net cage of 2.5m (length) �� 2.5m (width) �� 1.2m (height) by polyethylene mesh sheet, surrounding binds, and four angles can be inserted pond bottom with stainless steel and be fixed.Filtrate filling rate is 53%. 4 order mesh sheet (aperture 4.8mm), it is simple to stop that filtrate is scattered to outside net cage. At the bottom of patch pond, mesh sheet lower end. Mesh sheet bottom center puts an aeration plate, and aeration power is 2-2.5KW/ha, so that plastics filter bulb suspends. Aeration plate is supplied by Roots blower, selects the Roots blower of different capacity according to pond size. Waterwheel aerator is put in net cage both sides, drives flow path direction contrary, and number of units is fixed according to power and the cultivating pool water surface of aerator, it is ensured that in water body, dissolved oxygen is at more than 6mg/L.
The filter material external diameter 5-7cm adopted in the present invention, more than polyethylene mesh sheet mesh (4.8mm), eats by mistake without by cultivation object, and specific surface area (surface area per unit volume) is more than 300m2/m3, porosity more than 95%, proportion is less than 1.0 (being easy to suspend). Polyethylene mesh sheet and the equal buyable of polyethylene filter material.
In actual production process, about the 15 days filter material aerations to placing in polyethylene net cage should be shifted to an earlier date, to cultivate nitrobacteria. The present invention adopts intermittent aeration, i.e. aeration 30 minutes, stops aeration 2 hours. Because nitrobacteria is amphimicrobian aerobic bacteria, in water body, dissolved oxygen concentration is the suitableeest for 2-3mg/L. If but long-term not aeration, anaerobic state can be produced and be easily caused hydrogen sulfide and produce. Aquatic animal is had high lethal by hydrogen sulfide. We practice have shown that, this aeration mode ensure that in water body, dissolved oxygen is at more than 2mg/L.
Present invention could apply to the pond culture of fish, shrimp, the whole culture-cycle all can use.
Embodiment 1
Placing 9 net cages (2.5m �� 2.5m �� 1.2m, 4 orders) in a standardization cultivating pool (long * width=40m*150m), filter material adopts 7cm particle diameter polypropylene filter material, and proportion is 1.2g/cm, specific surface area 350m2/m3. The comparison pool is done in the pond of alternative similarity condition. The comparison pool adopts conventional cultivation pattern. The test pool: net cage filter material oxygenation, aeration quantity 2KW/ha are cultivated middle and late stage in first 15 days by bait throwing in, and aeration quantity increases to 2.5KW/ha. Net cage aeration adopts aeration 30 minutes, stops aeration 120 minutes, the aeration intermittent aeration mode of 30 minutes. The paddle aerator of 4 1.5kW is all placed on the experiment pool and the comparison pool, drives flow path direction contrary.
Seed adopts the SPF first generation shrimp seedling of Penaeus vannamei that high-quality is healthy, after 15d desalination mark is thick, puts Seedling and enters pond, test pool breeding density 60000PL/667m2(shrimp Seedling, specification 2.0cm), comparison pool breeding density: breeding density 60000PL/667m2(shrimp Seedling, specification 2.0cm). Every day uniformly throws something and feeds once along the side of a pond sooner or later for one week, and each feeding volume respectively accounts for the 50% of whole day feeding volume, and feeding volume controls as eating up (checking after bait throwing in 2h whether material platform has residual bait) in 2h. Feedstuff selects sea, Guangdong litopenaeus vannamei compound feed, crude protein content>=41%. Body length<during 2-5cm, the 9-10% of daily ration, feeding quantity percentage of liveweight; Body length<during 6-10cm, the 6-7% of daily ration, feeding quantity percentage of liveweight; Body length>10cm time, the 3-5% of daily ration, feeding quantity percentage of liveweight. Daily ration, feeding quantity suitably adjusts according to shrimp situation of ingesting. Day feeding volume ingest according to pond water quality, shrimp Seedling and the same day situation such as weather grasp flexibly. Continuous charge in 24 hours, dissolved oxygen concentration maintains more than 6mg/L.
During cultivation, every 7d, from the test pool and comparison pool water sampling, tests pH, total ammonia nitrogen (TAN), nitrous acid (NO respectively2-N), nitrate (NO3-N), dissolved oxygen (DO). Specification according to pond Prawn and load shrimp amount, carry out wheel in time and catch work, record each amount of fishing. Within 90th day, drain culturing pool results prawn, measure prawn yield and body weight, calculate prawn survival rate and specific rate of increase.
Practice result shows, test pool water quality situation is better than the comparison pool, and yield is apparently higher than the comparison pool.
Table 1 is tested the pool and compares pool water-quality ratio relatively
Note: with column data subscript difference letter representation significant difference (P < 0.05, n=100)
The pool tested by table 2 and comparison pool shrimp growing state compares
Note: with column data subscript difference letter representation significant difference (P < 0.05, n=100)
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the inventive method; can also making some improvement and supplement, these improve and supplement and also should be regarded as protection scope of the present invention.
Claims (8)
1. remove the method for ammonia nitrogen and nitrite in Aquacultural water for one kind, it is characterized in that, described pond is put into filter material net cage, the surrounding of filter material net cage is surrounded by polyethylene mesh sheet, polypropylene filter material is put in filter material net cage, being provided with gas explosion dish bottom filter material net cage, filter material net cage is fixed on pond bottom by stake.
2. the method for ammonia nitrogen and nitrite in removal Aquacultural water according to claim 1, it is characterised in that configure 4m according to every mu in described pond3Filtrate.
3. the method for ammonia nitrogen and nitrite in removal Aquacultural water according to claim 1, it is characterised in that described filter material net cage polythene strip surrounds the net cage of long 2.5m, wide 2.5m, high 1.2m, and polythene strip is 4 orders.
4. the method for ammonia nitrogen and nitrite in removal Aquacultural water according to claim 1, it is characterised in that in described filter material net cage, the filling rate of filtrate is 53%.
5. the method for ammonia nitrogen and nitrite in removal Aquacultural water according to claim 1, it is characterised in that the external diameter of described polypropylene filter material is 5-7cm, and specific surface area is more than 300m2/m3, porosity is more than 95%, and proportion is less than 1.0.
6. the method for ammonia nitrogen and nitrite in removal Aquacultural water according to claim 1, it is characterised in that described filter material net cage both sides are placed with drives the waterwheel aerator that flow path direction is contrary, it is ensured that in water body, dissolved oxygen is more than 6mg/L.
7. the method for ammonia nitrogen and nitrite in removal Aquacultural water according to claim 1, it is characterised in that filter material is carried out aeration in 15 days by described filter material net cage before manufacture in advance.
8. the method for ammonia nitrogen and nitrite in removal Aquacultural water according to claim 1, it is characterized in that, described pond is the standardization cultivating pool of long 40m, wide 150m, pond is placed 9 filter material net cages, the long 2.5m of filter material net cage, wide 2.5m, high 1.2m, the surrounding of filter material net cage is surrounded by the polythene strip of 4 orders, and putting into particle diameter in filter material net cage be 7cm, proportion is 1.2g/cm, specific surface area 350m2/m3Polypropylene filter material, filter material filling rate is 53%, and being provided with power bottom filter material net cage is 2-2.5KW/ha aeration plate, four angles of filter material net cage by stainless steel insert pond bottom fix.
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| CN201610015164.0A CN105645572A (en) | 2016-01-11 | 2016-01-11 | Low-cost method for treating ammonia nitrogen and nitrites in pond culture water body |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106689001A (en) * | 2016-12-08 | 2017-05-24 | 青岛理工大学 | Self-circulation prawn aquaculture method |
| CN106719248A (en) * | 2016-12-08 | 2017-05-31 | 青岛理工大学 | A kind of self-circulation type shrimp ecosystem |
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2016
- 2016-01-11 CN CN201610015164.0A patent/CN105645572A/en active Pending
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|---|---|---|---|---|
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