CN114906984A - Tail water treatment method for eel culture - Google Patents
Tail water treatment method for eel culture Download PDFInfo
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- CN114906984A CN114906984A CN202210477088.0A CN202210477088A CN114906984A CN 114906984 A CN114906984 A CN 114906984A CN 202210477088 A CN202210477088 A CN 202210477088A CN 114906984 A CN114906984 A CN 114906984A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 228
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000000746 purification Methods 0.000 claims abstract description 51
- 238000009395 breeding Methods 0.000 claims abstract description 22
- 230000001488 breeding effect Effects 0.000 claims abstract description 22
- 235000013399 edible fruits Nutrition 0.000 claims abstract description 16
- 239000002699 waste material Substances 0.000 claims abstract description 12
- 244000241257 Cucumis melo Species 0.000 claims abstract description 10
- 235000015510 Cucumis melo subsp melo Nutrition 0.000 claims abstract description 8
- 240000008436 Ipomoea aquatica Species 0.000 claims abstract description 8
- 235000007688 Lycopersicon esculentum Nutrition 0.000 claims abstract description 8
- 238000003973 irrigation Methods 0.000 claims abstract description 8
- 230000002262 irrigation Effects 0.000 claims abstract description 8
- 238000005507 spraying Methods 0.000 claims abstract description 3
- 240000003768 Solanum lycopersicum Species 0.000 claims abstract 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 30
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 30
- 229910052791 calcium Inorganic materials 0.000 claims description 30
- 239000011575 calcium Substances 0.000 claims description 30
- 229910052698 phosphorus Inorganic materials 0.000 claims description 30
- 239000011574 phosphorus Substances 0.000 claims description 30
- 241000252073 Anguilliformes Species 0.000 claims description 26
- 230000001681 protective effect Effects 0.000 claims description 25
- 239000013049 sediment Substances 0.000 claims description 20
- 238000005086 pumping Methods 0.000 claims description 16
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- 239000000126 substance Substances 0.000 claims description 9
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- 241000196324 Embryophyta Species 0.000 claims description 7
- 240000000691 Houttuynia cordata Species 0.000 claims description 7
- 235000013719 Houttuynia cordata Nutrition 0.000 claims description 7
- 241000237536 Mytilus edulis Species 0.000 claims description 7
- 235000006140 Raphanus sativus var sativus Nutrition 0.000 claims description 7
- 235000001601 Sabal palmetto Nutrition 0.000 claims description 7
- 230000009286 beneficial effect Effects 0.000 claims description 7
- 238000012258 culturing Methods 0.000 claims description 7
- 235000020638 mussel Nutrition 0.000 claims description 7
- 229920002401 polyacrylamide Polymers 0.000 claims description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 6
- 241000195493 Cryptophyta Species 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000013589 supplement Substances 0.000 claims description 6
- 239000008213 purified water Substances 0.000 claims description 5
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 claims description 3
- 235000012255 calcium oxide Nutrition 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
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- 244000088415 Raphanus sativus Species 0.000 claims 1
- 239000002689 soil Substances 0.000 abstract description 9
- MWKXCSMICWVRGW-UHFFFAOYSA-N calcium;phosphane Chemical compound P.[Ca] MWKXCSMICWVRGW-UHFFFAOYSA-N 0.000 abstract 5
- 240000002791 Brassica napus Species 0.000 abstract 1
- 235000011293 Brassica napus Nutrition 0.000 abstract 1
- 235000000540 Brassica rapa subsp rapa Nutrition 0.000 abstract 1
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- FJJCIZWZNKZHII-UHFFFAOYSA-N [4,6-bis(cyanoamino)-1,3,5-triazin-2-yl]cyanamide Chemical compound N#CNC1=NC(NC#N)=NC(NC#N)=N1 FJJCIZWZNKZHII-UHFFFAOYSA-N 0.000 abstract 1
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- 230000000694 effects Effects 0.000 description 6
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 4
- 238000009360 aquaculture Methods 0.000 description 4
- 244000144974 aquaculture Species 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
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- 244000241235 Citrullus lanatus Species 0.000 description 2
- 235000012828 Citrullus lanatus var citroides Nutrition 0.000 description 2
- 235000009847 Cucumis melo var cantalupensis Nutrition 0.000 description 2
- 238000009372 pisciculture Methods 0.000 description 2
- 241000252229 Carassius auratus Species 0.000 description 1
- 241000252210 Cyprinidae Species 0.000 description 1
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
-
- 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
-
- 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
- A01K63/042—Introducing gases into the water, e.g. aerators, air pumps
-
- 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
- A01K63/045—Filters for aquaria
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/327—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae characterised by animals and plants
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
The invention relates to the technical field of tail water treatment, in particular to a tail water treatment method for eel breeding, which comprises the steps of settling and separating tail water, spraying solid waste on a farmland as waste, purifying the tail water by a primary water purification tank, a deep water purification tank and a biological water purification tank in sequence, and introducing the tail water into the farmland for irrigation. The invention has the advantages that: set up crops such as melon, turnip, tomato, water spinach that the farmland was planted near breeding the pond and all be the great crop to the calcium phosphorus element absorbed volume, can make full use of to the calcium phosphorus element that is rich in the tail water deposit, can promote the growth of crop when avoiding calcium phosphorus element to pollute water soil in the tail water, realized making full use of to the tail water deposit, crops are bigger to the calcium phosphorus element demand 20 to 30 days about in the fruit expanding period and before picking up fruit, direct drainage to the farmland of purification tail water in the degree of depth purification pond is irrigated and can make full use of remaining calcium phosphorus element in the tail water and improve the tail water utilization ratio.
Description
Technical Field
The invention relates to the technical field of tail water treatment, in particular to a tail water treatment method for eel breeding.
Background
Fish farming is important in maintaining food supply, fishing, and expanding fishing areas, and many species are successfully introduced into new areas by fish farming, one of which is raising goldfish and tropical fish as occupational and hobbies, and the other of which includes raising cyprinid carps as baits and raising other fishes in private waters, and many places in the world are raising a large number of fishes and most of which are sold commercially, and eel farming has been explored for decades to develop a mature farming experience.
The existing tail water treatment method for eel culture has the following defects: the tail water and waste materials processed by the existing tail water treatment method for eel cultivation are mostly treated in a discharging or landfill mode and are not fully utilized.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a tail water treatment method for eel culture, and effectively solves the defects of the prior art.
The purpose of the invention is realized by the following technical scheme: a tail water treatment method for eel culture comprises the following steps:
1) thirty percent of tail water is extracted from a pool for culturing eels for treatment;
2) transferring the extracted tail water to a tail water treatment tank, adding a settling agent into the tail water, standing the tail water for settling, and separating the tail water from the sediment;
3) setting a farmland near the eel breeding base, and planting crops such as melons, radishes, tomatoes, swamp cabbage and the like in the farmland;
4) after the tail water is kept stand, the separated sediment is processed and then spread on the surrounding farmland to be used as waste to supplement elements such as calcium, phosphorus and the like for crops;
5) transferring the tail water after the sedimentation is finished into a primary water purifying tank, and finishing primary water purification through multiple filtration;
6) transferring the tail water after the primary water purification to a deep water purification tank for chemical water purification;
7) and transferring the tail water after the advanced treatment to a biological water purification pool for final purification, and storing the tail water after the treatment for irrigating nearby farmlands.
Optionally, the bottom of the pond for breeding the eels in the step 1) is provided with a protective screen, a water pumping port of the pond for breeding the eels in the step 1) is arranged at the bottom of the pond, two ends of the protective screen and the pond are movably connected in the step 1), the caliber of the protective screen for breeding the eels in the step 1) is smaller than the width of the eel fry, the eels are protected by the protective screen arranged at the bottom of the pond for breeding the eels, and the two ends of the protective screen are pulled to enable the protective screen to rise above the water pumping port during water drainage, so that interference of water flow generated when the water pumping port pumps the eels is avoided, the protective screen can be lifted to enable fishing to be more convenient during capturing of the eels, the water pumping port is arranged at the bottom of the pond to bring out a large amount of excrement, residual baits and the like deposited in the breeding water, and the purifying effect of pond water is improved.
Optionally, the settling agent in step 2) is nonionic polyacrylamide, and the settling time of the tail water in step 3) is longer than one hour, the nonionic polyacrylamide can adsorb suspended solid particles in the water, so that large flocculates are formed among the particles, the settling speed of waste materials such as feces residual baits in the tail water is accelerated, and the original suspended matters with smaller weight are gathered to complete settling, so that solid impurities in the tail water are cleaned.
Optionally, the sediment obtained in the step 4) is poured into a solid-liquid separation tank for centrifugal treatment to remove water, and then is dried, the dried sediment is sprayed in a farmland to serve as waste to supplement calcium and phosphorus elements for crops, the crops such as melons, radishes, tomatoes and swamp cabbage planted in the farmland near the culture pond are all crops with large calcium and phosphorus element absorption amount, the calcium and phosphorus elements rich in the sediment of tail water can be fully utilized, the phenomenon that the calcium and phosphorus elements in the tail water pollute water soil can be avoided, meanwhile, the growth of the crops can be promoted, and the full utilization of the sediment of the tail water is realized.
Optionally, three filter screens with gradually-reduced calibers are sequentially arranged in the preliminary purified water in the step 5), active carbon filter layers are arranged at the subordinate stages of the three filter screens, solid substances in the tail water are further filtered through the filter screens, and peculiar smell in the tail water is removed through the active carbon filter layers in a secondary adsorption mode.
Optionally, ozone is continuously poured into the deep water purification tank in the step 6), calcium hypochlorite and quick lime are added into the deep water purification tank, the ozone is added into the tail water, ammonia nitrogen and nitrite accumulated in the tail water can be effectively oxidized, the content of organic carbon and the concentration of chemical oxygen demand are reduced, various reductive pollutants in the tail water are removed, the effects of purifying water quality and optimizing aquaculture environment are achieved, and the ozone water purification efficiency is high, so that secondary pollution to the water body is avoided.
Optionally, mussel, fish, beneficial bacteria algae and aquatic plant are cultivated in the biological water purification tank of step 7), houttuynia cordata is planted at the edge of the biological water purification tank of step 7), mussel, fish, beneficial bacteria algae and aquatic plant can play a purifying role on tail water, and houttuynia cordata can absorb a large amount of calcium and phosphorus elements in the tail water, so that the situation that the biological water purification tank pollutes surrounding soil is avoided.
Optionally, the crops in the farmland in the step 3) are directly guided to flow to the farmland for irrigation in the fruit expansion period and 20 to 30 days before fruit picking, the requirements of the crops on calcium and phosphorus elements are larger in the fruit expansion period and 20 to 30 days before fruit picking, and the purified tail water in the deep purification pond is directly guided to the farmland for irrigation, so that the residual calcium and phosphorus elements in the tail water can be fully utilized, and the utilization rate of the tail water is improved.
The invention has the following advantages:
1. the tail water treatment method for eel culture comprises the steps of protecting eels by arranging the protective net at the bottom of a pool for culturing eels, pulling two ends of the protective net to enable the protective net to rise above a water pumping port during water drainage, so that interference of water flow generated when the water pumping port pumps water to the eels is avoided, the protective net can be lifted during eel catching to enable catching to be more convenient, the water pumping port is arranged at the bottom of the pool to enable a large amount of excrement and residual baits and the like deposited in culture water to be taken out, the purification effect of pool water is improved, nonionic polyacrylamide can adsorb solid particles suspended in water, large flocculates are formed among the particles, the settling speed of waste materials such as the excrement and residual baits in tail water is accelerated, suspended matters with small weight originally are gathered to complete settling, the solid impurities in the tail water are cleaned, melons planted in farmlands, muskmelons, water melons, water and the like are arranged near the pool for culturing the eels, The crops such as radishes, tomatoes and swamp cabbage are crops with large calcium and phosphorus element absorption amount, calcium and phosphorus elements rich in the sediment of the tail water can be fully utilized, the calcium and phosphorus elements in the tail water are prevented from polluting water body soil, the growth of the crops can be promoted, and the full utilization of the sediment of the tail water is realized.
2. The tail water treatment method for eel culture further filters solid matters in tail water through the filter screen, removes peculiar smell in the tail water through the active carbon filter layer by adsorption again, can effectively oxidize ammonia nitrogen and nitrite accumulated in the tail water by adding ozone into the tail water, reduces organic carbon content and chemical oxygen demand concentration, removes various reductive pollutants in the tail water, plays a role in purifying water quality and optimizing aquaculture environment, has high ozone water purification efficiency and does not cause secondary pollution to water, mussel, fish, beneficial bacteria algae and aquatic plants can play a role in purifying the tail water, houttuynia cordata can absorb a large amount of calcium and phosphorus elements in the tail water, avoids the condition that a biological purification tank pollutes surrounding soil is avoided, crops have higher demand on the calcium and phosphorus elements in the fruit expansion period and 20-30 days before fruit picking, purified tail water in a deep purification tank is directly drained to farmlands for irrigation, and can fully utilize residual calcium and phosphorus elements in the tail water The utilization rate of tail water is improved.
Drawings
FIG. 1 is a schematic flow diagram of the process of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following.
As shown in fig. 1, a tail water treatment method for eel farming includes the following steps:
1) thirty percent of tail water is extracted from a pool for culturing eels for treatment;
2) transferring the extracted tail water to a tail water treatment tank, adding a settling agent into the tail water, standing the tail water for settling, and separating the tail water from the sediment;
3) setting a farmland near the eel breeding base, and planting crops such as melons, radishes, tomatoes, swamp cabbage and the like in the farmland;
4) after the tail water is kept stand, the separated sediment is processed and then spread on the peripheral farmland to be used as waste to supplement elements such as calcium, phosphorus and the like for crops;
5) transferring the tail water after the sedimentation is finished into a primary water purifying tank, and finishing primary water purification through multiple filtration;
6) transferring the tail water after the primary water purification to a deep water purification tank for chemical water purification;
7) and transferring the tail water after the advanced treatment to a biological water purification pool for final purification, and storing the tail water after the treatment for irrigating nearby farmlands.
As an optional technical scheme of the invention: the bottom of the pond for breeding the eels in the step 1) is provided with a protective net, a water pumping port of the pond for breeding the eels in the step 1) is arranged at the bottom of the pond, two ends of the protective net of the pond for breeding the eels in the step 1) are movably connected with the pond, the caliber of the protective net of the pond for breeding the eels in the step 1) is smaller than the width of eel fries, the eels are protected by arranging the protective net at the bottom of the pond for breeding the eels, two ends of the protective net are pulled to enable the protective net to rise above the water pumping port during water drainage, so that interference of water flow generated during water pumping of the water pumping port on the eels is avoided, the protective net can be lifted up to enable fishing to be more convenient during capturing of the eels, the water pumping port is arranged at the bottom of the pond to bring out a large amount of excrement, residual baits and the like deposited in the breeding water, and the purifying effect of pond water is improved.
As an optional technical scheme of the invention: the settling agent in the step 2) is nonionic polyacrylamide, the settling and standing time of the tail water in the step 3) is more than one hour, the nonionic polyacrylamide can adsorb suspended solid particles in the water, large flocculate is formed among the particles, the settling speed of waste materials such as excrement and residual baits in the tail water is accelerated, and the original suspended matters with smaller weight are gathered to complete settling, so that solid impurities in the tail water are cleaned.
As an optional technical scheme of the invention: and (3) pouring the sediment obtained in the step 4) into a solid-liquid separation tank, performing centrifugal treatment to remove water, drying, spraying the dried sediment in a farmland as waste to supplement calcium and phosphorus elements for crops, wherein the crops such as melons, radishes, tomatoes, swamp cabbage and the like planted in the farmland near the culture pond are crops with large calcium and phosphorus element absorption amount, the calcium and phosphorus elements rich in the sediment of the tail water can be fully utilized, the calcium and phosphorus elements in the tail water are prevented from polluting water body soil, the growth of the crops can be promoted, and the full utilization of the sediment of the tail water is realized.
As an optional technical scheme of the invention: three filter screens with gradually reduced calibers are sequentially arranged in the preliminary purified water in the step 5), active carbon filter layers are arranged at the lower stages of the three filter screens, solid substances in the tail water are further filtered through the filter screens, and peculiar smell in the tail water is removed through the active carbon filter layers in a secondary adsorption mode.
As an optional technical scheme of the invention: and 6) continuously filling ozone into the deep water purification tank, adding calcium hypochlorite and quick lime into the deep water purification tank, adding the ozone into the tail water to effectively oxidize ammonia nitrogen and nitrite accumulated in the tail water, reducing the content of organic carbon and the concentration of chemical oxygen demand, removing various reductive pollutants in the tail water, purifying the water quality, optimizing the aquaculture environment, and having high ozone water purification efficiency without causing secondary pollution to the water body.
As an optional technical scheme of the invention: freshwater mussels, fishes, beneficial bacteria algae and aquatic plants are cultured in the biological water purification tank in the step 7), houttuynia cordata is planted at the edge of the biological water purification tank in the step 7), the freshwater mussels, the fishes, the beneficial bacteria algae and the aquatic plants can purify tail water, and the houttuynia cordata can absorb a large amount of Chinese calcium and phosphorus elements in the tail water, so that the situation that surrounding soil is polluted by the biological water purification tank is avoided.
As an optional technical scheme of the invention: and 3) directly guiding the deeply purified water in the deep purification tank to the farmland for irrigation in the fruit expansion period and about 20 to 30 days before fruit picking of the crops in the farmland, wherein the requirement on calcium and phosphorus elements of the crops is higher in the fruit expansion period and about 20 to 30 days before fruit picking, and the purified tail water in the deep purification tank is directly guided to the farmland for irrigation, so that the residual calcium and phosphorus elements in the tail water can be fully utilized, and the utilization rate of the tail water is improved.
In summary, the following steps: the tail water treatment method for eel culture comprises the steps of protecting eels by arranging the protective net at the bottom of a pool for culturing eels, pulling two ends of the protective net to enable the protective net to rise above a water pumping port during water drainage, so that interference of water flow generated when the water pumping port pumps water to the eels is avoided, the protective net can be lifted during eel catching to enable catching to be more convenient, the water pumping port is arranged at the bottom of the pool to enable a large amount of excrement and residual baits and the like deposited in culture water to be taken out, the purification effect of pool water is improved, nonionic polyacrylamide can adsorb solid particles suspended in water, large flocculates are formed among the particles, the settling speed of waste materials such as the excrement and residual baits in tail water is accelerated, suspended matters with small weight originally are gathered to complete settling, the solid impurities in the tail water are cleaned, melons planted in farmlands, muskmelons, water melons, water and the like are arranged near the pool for culturing the eels, The crops such as radishes, tomatoes, swamp cabbage and the like have large calcium and phosphorus element absorption amount, and calcium and phosphorus elements rich in the sediment of the tail water can be fully utilized, so that the calcium and phosphorus elements in the tail water are prevented from polluting water body soil, the growth of the crops can be promoted, and the full utilization of the sediment of the tail water is realized; the solid matters in the tail water are further filtered by the filter screen, the peculiar smell in the tail water is removed by absorbing again by the active carbon filter layer, the ammonia nitrogen and the nitrite accumulated in the tail water can be effectively oxidized by adding the ozone into the tail water, the content of the organic carbon and the concentration of the chemical oxygen demand are reduced, a plurality of reductive pollutants in the tail water are removed, the effects of purifying the water quality and optimizing the aquaculture environment are achieved, the ozone water purification efficiency is high, secondary pollution to water is avoided, tail water can be purified by the mussels, the fishes, the beneficial bacteria and the aquatic plants, the houttuynia cordata can absorb a large amount of Chinese calcium and phosphorus elements in the tail water, the situation that surrounding soil is polluted by a biological purification tank is avoided, the crops have greater requirements on calcium and phosphorus elements in the fruit expansion period and 20 to 30 days before fruit picking, and the purified tail water in the deep purification tank is directly drained to a farmland for irrigation, so that the residual calcium and phosphorus elements in the tail water can be fully utilized, and the utilization rate of the tail water is improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A tail water treatment method for eel culture is characterized by comprising the following steps:
1) thirty percent of tail water is extracted from a pool for culturing eels for treatment;
2) transferring the extracted tail water to a tail water treatment tank, adding a settling agent into the tail water, standing the tail water for settling, and separating the tail water from the sediment;
3) setting a farmland near the eel breeding base, and planting crops such as melons, radishes, tomatoes, swamp cabbage and the like in the farmland;
4) after the tail water is kept stand, the separated sediment is processed and then spread on the surrounding farmland to be used as waste to supplement elements such as calcium, phosphorus and the like for crops;
5) transferring the tail water after the sedimentation is finished into a primary water purifying tank, and finishing primary water purification through multiple filtration;
6) transferring the tail water after the primary water purification to a deep water purification tank for chemical water purification;
7) and transferring the tail water after advanced treatment to a biological water purification tank for final purification, and storing the tail water after treatment for irrigating nearby farmlands.
2. The tail water treatment method for eel farming according to claim 1, wherein: the eel breeding pond comprises a step 1) and is characterized in that a protective net is arranged at the bottom of the eel breeding pond in the step 1), a water pumping port of the eel breeding pond in the step 1) is arranged at the bottom of the pond, two ends of the protective net in the eel breeding pond in the step 1) are movably connected with the pond, and the caliber of the protective net in the eel breeding pond in the step 1) is smaller than the width of eel fries.
3. The tail water treatment method for eel farming according to claim 1, wherein: the settling agent in the step 2) is nonionic polyacrylamide, and the settling and standing time for tail water in the step 3) is more than one hour.
4. The tail water treatment method for eel farming according to claim 1, wherein: and (3) pouring the sediment obtained in the step 4) into a solid-liquid separation tank, carrying out centrifugal treatment to remove water, drying, and spraying the dried sediment in a farmland as waste to supplement calcium and phosphorus elements for crops.
5. The tail water treatment method for eel farming according to claim 1, wherein: three filter screens with gradually-reduced calibers are sequentially arranged in the preliminary purified water in the step 5), and an activated carbon filter layer is arranged at the lower stage of the three filter screens.
6. The tail water treatment method for eel farming according to claim 1, wherein: and continuously filling ozone into the deep water purification tank in the step 6), and adding calcium hypochlorite and quicklime into the deep water purification tank.
7. The tail water treatment method for eel farming according to claim 1, wherein: freshwater mussels, fishes, beneficial bacteria, algae and aquatic plants are cultured in the biological water purification tank in the step 7), and houttuynia cordata is planted at the edge of the biological water purification tank in the step 7).
8. The tail water treatment method for eel farming according to claim 1, wherein: and 3) directly guiding the deeply purified water in the deep purification pool to the farmland for irrigation in the fruit expansion period and 20-30 days before fruit picking of the crops in the farmland in the step 3).
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| CN109721210A (en) * | 2018-12-19 | 2019-05-07 | 广州润泽科技发展有限公司 | A kind of cultivation tail water three-level filter system |
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| CN113620542A (en) * | 2021-09-09 | 2021-11-09 | 浙江清湖控股集团有限公司 | Eel culture tail water treatment method and system |
| CN113728968A (en) * | 2021-10-14 | 2021-12-03 | 深圳市澳华集团股份有限公司 | Circulating water aquaculture system for freshwater fishery and aquaculture method of system |
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| JP2019068772A (en) * | 2017-10-10 | 2019-05-09 | オルガノ株式会社 | Water treatment device and water treatment method |
| CN109721210A (en) * | 2018-12-19 | 2019-05-07 | 广州润泽科技发展有限公司 | A kind of cultivation tail water three-level filter system |
| CN113429022A (en) * | 2021-07-01 | 2021-09-24 | 江西省科学院微生物研究所 | Modular rapid culture biogas slurry wastewater treatment system and operation method thereof |
| CN113620542A (en) * | 2021-09-09 | 2021-11-09 | 浙江清湖控股集团有限公司 | Eel culture tail water treatment method and system |
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