CN108552095B - Treatment method of water for seedling safety - Google Patents

Treatment method of water for seedling safety Download PDF

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CN108552095B
CN108552095B CN201810213546.3A CN201810213546A CN108552095B CN 108552095 B CN108552095 B CN 108552095B CN 201810213546 A CN201810213546 A CN 201810213546A CN 108552095 B CN108552095 B CN 108552095B
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water
pond
auxiliary
main
ponds
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CN108552095A (en
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张宇飞
郭建林
程海华
顾志敏
高强
陈雪峰
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Zhejiang Institute of Freshwater Fisheries
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Zhejiang Institute of Freshwater Fisheries
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    • 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
    • A01K61/00—Culture of aquatic animals
    • A01K61/50—Culture of aquatic animals of shellfish
    • A01K61/59—Culture of aquatic animals of shellfish of crustaceans, e.g. lobsters or shrimps
    • 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
    • A01K63/003—Aquaria; Terraria
    • 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
    • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
    • 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
    • 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
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/001—Upstream control, i.e. monitoring for predictive control
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/29—Chlorine compounds
    • 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)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Zoology (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Farming Of Fish And Shellfish (AREA)

Abstract

The invention belongs to the field of aquaculture, and particularly relates to a method for treating safe water for seedling culture, which comprises the following steps: firstly, carrying out safety detection on the water quality of an external water intake; secondly, taking water from a water taking port to the auxiliary pond; thirdly, disinfecting the water body after the auxiliary pond is filled with water; fourthly, after the disinfection work is carried out for 2-3 days, opening a bottom oxygen increasing machine and an impeller oxygen increasing machine in the daytime and detecting residual chlorine in the water body, and introducing the water in the auxiliary pond into the main pond for standby when the water body does not contain residual chlorine; fifthly, after the main pond is filled with water, opening the bottom to increase oxygen for 2 hours every noon, uniformly mixing the upper water layer and the lower water layer, and keeping the water activity; sixthly, taking the main pond water and putting a proper amount of larvae into the main pond water for seedling test 3-5 days before the seedling culture work is started and before the main pond water is introduced into a workshop; through the optimized design of the water storage pond, the water storage pond is built into a plurality of ponds which are moderate in area, convenient to manage and detailed in function, so that the disinfection work is carried out efficiently and safely.

Description

Treatment method of water for seedling safety
Technical Field
The invention belongs to the field of aquaculture, and particularly relates to a method for treating safe water for seedling culture.
Background
1. The seedling culture industry occupies a very important position in the whole macrobrachium rosenbergii industry, and high-quality shrimp seedlings have the advantages of fast growth, high survival rate, strong disease resistance and the like, and are one of important factors for determining the success of macrobrachium rosenbergii cultivation, but the seedling culture work has very high requirements on water quality, and poor water quality can cause that larvae are gradually metamorphotic and develop difficultly, diseases are frequent, the emergence rate is low, and even the emergence cannot be realized, so that how to ensure the safety of the water for culturing the macrobrachium rosenbergii seedlings is very important.
2. The traditional reservoir for culturing the seedlings of the macrobrachium rosenbergii integrates water storage and disinfection, has larger area, and is mainly used for storing more high-quality fresh water in winter to be beneficial to the smooth development of the seedling culturing work. However, the larger area causes inconvenience in daily management, such as aging of water due to too long water storage time, unsatisfactory effect due to too early disinfection time, and negative influence on seedling cultivation due to delayed disinfection time without medicine effect.
In recent years, the portable water quality detection technology is rapidly developed in the aspect of aquaculture, for example, the detection of the conventional water quality indexes such as pH, residual chlorine, ammonia nitrogen and nitrite can be rapidly operated at a pond mouth, and convenience is brought to the water quality detection of seedling raising units, but the indexes can only reflect the ice mountain corner of the water quality condition. The comprehensive detection of the water quality needs professional detection personnel and detection instruments, which are not practical for the seedling raising unit, and even if a professional organization is entrusted to detect, the detection time is long, and the actual requirements of the seedling raising unit cannot be met.
Disclosure of Invention
The invention aims to provide a method for treating safe water for breeding macrobrachium rosenbergii, in particular to a method for treating safe water for breeding macrobrachium rosenbergii, which aims at solving the problems, optimizes a disinfection management technology and establishes a set of water quality safety detection technology with strong applicability and high reliability by reasonably modifying a water storage pond, thereby ensuring the safe reliability of the water for breeding the macrobrachium rosenbergii.
The technical purpose of the invention is realized by the following technical scheme:
a treatment method of water for seedling safety comprises the following steps:
the method comprises the steps that a plurality of net cages are arranged in the area from the upstream of a water intake to the vicinity of the water intake, wild shrimps are placed in each net cage, and the detection is carried out by adopting a live shrimp trial culture method;
secondly, taking water from a water taking port to the auxiliary pond;
thirdly, disinfecting the water body after the auxiliary pond is filled with water;
fourthly, after the disinfection work is carried out for 2-3 days, opening a bottom oxygen increasing machine and an impeller oxygen increasing machine in the daytime and detecting residual chlorine in the water body, and introducing the water in the auxiliary pond into the main pond for standby when the water body does not contain residual chlorine;
fifthly, after the main pond is filled with water, opening the bottom to increase oxygen for 2 hours every noon, uniformly mixing the upper water layer and the lower water layer, and keeping the water activity;
sixthly, 3-5 days before the seedling culture work begins and before the main pond water is introduced into the workshop, taking the main pond water, putting a proper amount of larvae into the main pond water for seedling test, and introducing the main pond water into the workshop for normal use after observing that the state of the larvae is normal;
seventhly, after the water disinfected in one auxiliary pond is used up, taking water, disinfecting and detecting according to the steps from one step to four;
the number of the main ponds is one, the number of the auxiliary ponds is three, the auxiliary ponds are arranged around the main ponds, and after all the auxiliary ponds are supplied to the main ponds, other auxiliary ponds are started in sequence.
Preferably, in the first step, 5 net cages with the specification of 1 m × 1 m are arranged in the area from 500 m upstream of the water intake to the vicinity of the water intake, 2-3 local wild shrimps are placed in each net cage, and the health condition of the shrimps in each net cage and the indexes of the pH value, residual chlorine, ammonia nitrogen and nitrite of the water body are checked every day.
Preferably, after continuously observing and detecting for 3-5 days in the step one, determining that the shrimp in each net cage is normal in state and normal in detection indexes that the pH value is 8.0-8.3, the residual chlorine is 0 mg/L, the ammonia nitrogen is less than 0.1 mg/L and the nitrite is less than 0.05 mg/L, and then water can be taken safely.
Preferably, the depth of the main pond and the depth of the auxiliary pond are 3-4 m, the total water storage capacity of the main pond and the auxiliary pond is 7-10 times of the total daily water consumption of a workshop, the main pond is arranged at a centering position on one side close to the seedling raising workshop, and the 3 auxiliary ponds are respectively positioned on three sides of the main pond.
Preferably, the area of the main pond is 10-15 mu, the area of each of the 3 auxiliary ponds is controlled to be 8-9 mu, one nano oxygen increasing disc is placed at each bottom of each of the main pond and the auxiliary ponds every 100 square meters, and an impeller oxygen increasing machine is arranged in the center of each of the main pond and the auxiliary ponds.
Preferably, after 3 auxiliary ponds in the third step are filled with water, the total number of bacteria and the number of coliform groups in the water body are checked, and then 10-20 ppm of special bleaching powder for aquatic products with 30% of available chlorine is used for water body disinfection.
Preferably, in the disinfection work, the bleaching powder solution is uniformly splashed to the water surface of the auxiliary pond by rowing at four o ' clock and half o ' clock to five o ' clock every afternoon every day, the bottom oxygen increasing machine and the impeller oxygen increasing machine are opened for 4-6 hours after the splashing is finished, the water body is uniformly mixed, after the disinfection work is carried out for 2-3 days, the total number of water body bacteria and the number of coliform groups are detected, and the total number of the water body bacteria after the disinfection is controlled to reach 3.0 × 102～6.7×103The cfu/ml range, the coliform bacteria number reaches 0.03-0.09 MPN/ml.
Preferably, 50L of the main pond water seedlings are sampled for 11-13 hours in the sixth step.
Preferably, the water inlets of the auxiliary pond and the main pond are provided with lifting pipes for pumping the fed water and then dropping the water into the pond, the water inlets are provided with lifting frames, and the lifting pipes are arranged on the lifting frames.
Preferably, the riser is arranged in the slant pond from bottom to top, a pipe orifice at the upper end of the riser is arranged upwards in a slant manner, the lifting frame comprises a square frame body, a detachable fixing seat for fixing the pipe orifice of the riser is arranged at the upper end of the square frame body, a blocking net is arranged at the front end of the pipe orifice of the riser at the upper end of the square frame body, the lower end of the blocking net is connected with a guide groove extending downwards to the outer side of the square frame body and the pond edge, the upper part of the guide groove is a flat guide groove, and the.
The design of hoisting frame and riser improves the water of sending into and throws out again and falls into the pond in, thereby can improve the activity of water fast and make the water of whole pond quick even, set up fence and guide slot structure simultaneously, can filter the impurity and the rubbish of doping, and lead the below with debris through the guide slot, above-mentioned specific guide slot structural design can ensure that debris walk downwards along glossy dull and stereotyped guide slot earlier, then filtered the water accumulation through the screen cloth guide slot, thereby avoid piling up at the delivery port, ensure whole filterable work efficiency of sending water, also be convenient for clear up. And the arrangement of the equipment improves the purity of pond water, reduces the workload of workers for cleaning and improves the water utilization efficiency of the whole system.
In conclusion, the invention has the following beneficial effects:
1. by optimally designing the water storage ponds, a plurality of ponds with moderate construction areas, convenient management and detailed functions are built, so that the disinfection work is efficiently and safely carried out, and an effective facility foundation is provided for the safety of the water for raising the seedlings of the macrobrachium rosenbergii. Starting from the general practical situation of the seedling production unit, a set of water quality safety detection technical process which has strong applicability, high guarantee and convenient operation is established, so that the safety and the reliability of the water for culturing the macrobrachium rosenbergii seedlings are ensured.
2. The method is simple, efficient and low in cost.
Drawings
FIG. 1 is a schematic layout of a main pond, an auxiliary pond and a workshop of the application;
fig. 2 is a schematic view of the riser and riser structure of the present application.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
The first embodiment is as follows:
a treatment method of water for seedling safety comprises the following steps:
the method comprises the steps that a plurality of net cages are arranged in the area from the upstream of a water intake to the vicinity of the water intake, wild shrimps are placed in each net cage, and the detection is carried out by adopting a live shrimp trial culture method;
secondly, taking water from a water taking port to the auxiliary pond;
thirdly, disinfecting the water body after the auxiliary pond is filled with water;
fourthly, after the disinfection work is carried out for 2-3 days, opening a bottom oxygen increasing machine and an impeller oxygen increasing machine in the daytime and detecting residual chlorine in the water body, and introducing the water in the auxiliary pond into the main pond for standby when the water body does not contain residual chlorine;
fifthly, after the main pond is filled with water, opening the bottom to increase oxygen for 2 hours every noon, uniformly mixing the upper water layer and the lower water layer, and keeping the water activity;
sixthly, 3-5 days before the seedling culture work begins and before the main pond water is introduced into the workshop, taking the main pond water, putting a proper amount of larvae into the main pond water for seedling test, and introducing the main pond water into the workshop for normal use after observing that the state of the larvae is normal;
seventhly, after the water disinfected in one auxiliary pond is used up, taking water, disinfecting and detecting according to the steps from one step to four;
the number of the main ponds is one, the number of the auxiliary ponds is three, the auxiliary ponds are arranged around the main ponds, and after all the auxiliary ponds are supplied to the main ponds, other auxiliary ponds are started in sequence.
The steps are as follows:
the newly-built impoundment pond comprises 1 main pond and 3 auxiliary ponds, wherein the main pond is used for storing safe water for seedling culture, and the auxiliary ponds are used for disinfecting external water. The main pond is close to the seedling raising workshop, the water for seedling raising production can only be taken from the main pond, and 3 auxiliary ponds are required to surround the main pond (see figure 1). The depth of the main pond and the auxiliary pond is preferably 3-4 meters, the total water storage amount is 7-10 times of the total water consumption of a workshop per day, the area of the main pond is 7.2 mu, and the area of 3 auxiliary ponds is 8.5 mu, 8.6 mu and 9 mu respectively.
A7.5 KW Rotz air blower is arranged between a main pond and an auxiliary pond, a phi 110mm PVC pipe is adopted as a main ventilation pipeline, a phi 75mm PVC pipe is adopted as a branch, all the pipes are buried under the ground by 20 cm, a nano oxygenation disc is arranged at the bottom of each pond every 100 square meters to promote the uniform mixing of upper and lower water bodies, and a 3 KW impeller aerator is arranged in the center of each pond.
After the water storage pond is built, 100 kg/mu of quicklime is used for cleaning and disinfecting the pond, 30 days before the seedling raising work is started, 5 net cages with the specification of 1 m multiplied by 1 m are arranged in the area from 500 m upstream of a water intake to the vicinity of the water intake, 2-3 local wild shrimps are placed in each net cage, the net meshes of the net cages are larger as much as possible so that the shrimps can not escape, a specially-assigned person is responsible for checking the health condition of the shrimps in each net cage and detecting the indexes such as water pH, residual chlorine, ammonia nitrogen and nitrite every day, and after continuous observation and detection are carried out for 3-5 days, the shrimps in each net cage are determined to be normal in state, and the water can be taken safely under the normal indexes of pH being 8.0-8.3, residual chlorine being 0 mg/L, ammonia nitrogen being less than 0.1 mg/L and nitrite being less than 0.05.
3 auxiliary ponds begin to feed water, and 60-80 mesh silk nets are sleeved at water inlets for filtering. After the auxiliary pond is filled with water, an examiner detects the total number of bacteria and the number of coliform groups in the water body, and then 10-20 ppm of special aquatic product bleaching powder with the available chlorine of 30% is used for water body disinfection.
The disinfection work needs to be carried out by rowing to uniformly splash bleaching powder solution to the water surface of the auxiliary pond at 5 pm, the bottom oxygenation and impeller oxygenation machines are opened for 4-6 hours after the splashing is finished to uniformly mix the water body, the bottom oxygenation and impeller oxygenation machines are opened in the daytime after the disinfection work is carried out for 2-3 days, the water of the auxiliary pond can be led into the main pond for standby when the water body does not have residual chlorine, in addition, the total number of bacteria and the number of coliform groups in the water body are detected, the comparison with the non-disinfection work is carried out, the dosage of bleaching powder used during disinfection is adjusted in time, and the total number of bacteria in the water body after disinfection is controlled to be 3.0 × 102～6.7×103The cfu/ml range, the coliform bacteria number reaches 0.03-0.09 MPN/ml.
And in the process of supplying water to the main pond by the auxiliary ponds, after all the water in the auxiliary ponds is supplied to the main pond, starting other auxiliary ponds in sequence, and forbidding two or all the auxiliary ponds to simultaneously supply water to the main pond. After the main pond is fully filled with water, the bottom is opened to increase oxygen for 2 hours every noon, so that the upper water layer and the lower water layer are uniformly mixed, and the water activity is kept.
3-5 days before the seedling culture work begins and before the main pond water is introduced into a workshop, 50L of main pond water is taken and subjected to corresponding water distribution and temperature rise treatment, a proper amount of larvae are put into the pond water to test seedlings for about 12 hours under the conditions of proper temperature and aeration, after the observation that the state of the larvae is normal, the main pond water can be introduced into the workshop for normal use, and a 60-80-mesh sieve silk net is sleeved at a water outlet of the workshop for filtration in the water diversion process.
And after the water sterilized in one of the auxiliary ponds is used up, taking, sterilizing and detecting according to the steps.
And detecting conventional water quality indexes such as pH, residual chlorine, ammonia nitrogen and nitrite in the main pond and the auxiliary pond every day, and recording the conventional water quality indexes to facilitate future tracing.
Example two:
the difference of the embodiment is that the water inlets of the auxiliary pond and the main pond are provided with lift pipes 1 for pumping the fed water and then dropping the water into the pond, the water inlets are provided with lifting frames 2, and the lift pipes are arranged on the lifting frames. The lift pipe is set up by lower supreme slant pool, lift pipe upper end mouth of pipe slant sets up, the hoisting frame includes square support body, and square support body upper end is equipped with the orificial detachable fixing base of fixed lift pipe, square support body upper end is located lift pipe mouth of pipe front end is equipped with block 3, the block lower extreme is connected with the guide slot that extends to the square support body outside and pool limit downwards, guide slot upper portion is dull and stereotyped guide slot 31, and the lower part is screen cloth guide slot 32. The frame foot that square support body is located the pond is longer than the frame foot that is located the pond along, and the barrier net is circular hurdle net, and the guide slot is along the complex arc guide slot with circular hurdle net bottom arc.
The design of hoisting frame and riser improves the water of sending into and throws out again and falls into the pond in, thereby can improve the activity of water fast and make the water of whole pond quick even, set up fence and guide slot structure simultaneously, can filter the impurity and the rubbish of doping, and lead the below with debris through the guide slot, above-mentioned specific guide slot structural design can ensure that debris walk downwards along glossy dull and stereotyped guide slot earlier, then filtered the water accumulation through the screen cloth guide slot, thereby avoid piling up at the delivery port, ensure whole filterable work efficiency of sending water, also be convenient for clear up.
After the steps are carried out, the conventional water quality indexes of the main pond are basically maintained at pH8.0-8.3, residual chlorine is 0 mg/L, and ammonia nitrogen<0.1 mg/L and nitrite<0.05 mg/L, total bacteria in the water before the water of the subsidiary pond is not disinfected of 5.0 × 103～2.2×104The number of cfu/ml and coliform groups is 0.3-1.6 MPN/ml, and the total number of bacteria is basically kept to be 3.0 × 10 after the disinfection treatment2～6.7×103The number of cfu/ml and coliform groups is 0.03-0.09 MPN/ml, and the disinfection and sterilization effect reaches more than 70%.

Claims (10)

1. A treatment method of safe water for seedling culture is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the steps that a plurality of net cages are arranged in the area from the upstream of a water intake to the vicinity of the water intake, wild shrimps are placed in each net cage, and the detection is carried out by adopting a live shrimp trial culture method;
secondly, taking water from a water taking port to the auxiliary pond;
thirdly, disinfecting the water body after the auxiliary pond is filled with water;
fourthly, after the disinfection work is carried out for 2-3 days, opening a bottom oxygen increasing machine and an impeller oxygen increasing machine in the daytime and detecting residual chlorine in the water body, and introducing the water in the auxiliary pond into the main pond for standby when the water body does not contain residual chlorine;
fifthly, after the main pond is filled with water, opening the bottom to increase oxygen for 2 hours every noon, uniformly mixing the upper water layer and the lower water layer, and keeping the water activity;
sixthly, 3-5 days before the seedling culture work begins and before the main pond water is introduced into the workshop, taking the main pond water, putting a proper amount of larvae into the main pond water for seedling test, and introducing the main pond water into the workshop for normal use after observing that the state of the larvae is normal;
seventhly, after the water disinfected in one auxiliary pond is used up, taking water, disinfecting and detecting according to the steps from one step to four;
the number of the main ponds is one, the number of the auxiliary ponds is three, the auxiliary ponds are arranged around the main ponds, and after all the auxiliary ponds are supplied to the main ponds, other auxiliary ponds are started in sequence.
2. The method for treating water for seedling safety according to claim 1, which is characterized in that: in the first step, 5 net cages with the specification of 1 m multiplied by 1 m are arranged in the area from 500 m upstream of the water intake to the vicinity of the water intake, 2-3 local wild shrimps are placed in each net cage, and the health condition of the shrimps in each net cage and the indexes of the pH value, the residual chlorine, the ammonia nitrogen and the nitrite of the water body are checked every day.
3. The method for treating water for seedling safety as claimed in claim 2, wherein: and (3) continuously observing and detecting for 3-5 days in the step one, determining that the state of the shrimps in each net cage is normal, and taking water safely under the normal indexes that the pH value is 8.0-8.3, the residual chlorine is 0 mg/L, the ammonia nitrogen is less than 0.1 mg/L and the nitrite is less than 0.05 mg/L in the detection indexes.
4. The method for treating water for seedling safety according to claim 1, which is characterized in that: the depth of the main pond and the depth of the auxiliary pond are 3-4 m, the total water storage capacity of the main pond and the auxiliary pond is 7-10 times of the total daily water consumption of a workshop, the main pond is arranged at a centering position on one side close to the seedling raising workshop, and the 3 auxiliary ponds are respectively positioned on three sides of the main pond.
5. The method for treating water for seedling safety according to claim 1, which is characterized in that: the area of the main pond is 10-15 mu, the area of each of 3 auxiliary ponds is controlled to be 8-9 mu, one nano oxygen increasing disc is arranged at each bottom of each main pond and each auxiliary pond every 100 square meters, and an impeller oxygen increasing machine is arranged in the center of each main pond and each auxiliary pond.
6. The method for treating water for seedling safety according to claim 1, which is characterized in that: and (3) after the auxiliary ponds in the third step are filled with water, checking the total number of bacteria and the number of coliform groups in the water body, and then disinfecting the water body by using 10-20 ppm of special bleaching powder for aquatic products with 30% of available chlorine.
7. The method for treating water for safety seedling culture according to claim 6, wherein the bleaching powder solution is uniformly sprinkled on the water surface of the secondary pond by rowing at four o ' clock and half o ' clock to five o ' clock in the afternoon every day during disinfection, the bottom aerator and the impeller aerator are opened for 4-6 hours after sprinkling to uniformly mix the water, the total number of water bacteria and the number of coliform bacteria are detected after the disinfection is carried out for 2-3 days, and the total number of the water bacteria after disinfection is controlled to 3.0 × 102～6.7×103The cfu/ml range, the coliform bacteria number reaches 0.03-0.09 MPN/ml.
8. The method for treating water for seedling safety according to claim 6, which is characterized in that: and in the sixth step, 50L of main pond water seedlings are sampled for 11-13 hours.
9. The method for treating water for seedling safety according to claim 1, which is characterized in that: and the water inlets of the auxiliary pond and the main pond are provided with lift pipes (1) for pumping the fed water and then dropping the water into the pond, the water inlets are provided with lift frames (2), and the lift pipes are arranged on the lift frames.
10. The method for treating water for seedling safety according to claim 9, wherein the method comprises the following steps: the lift pipe is set up by lower supreme slant pool, lift pipe upper end mouth of pipe slant sets up, the hoisting frame includes square support body, and square support body upper end is equipped with the orificial detachable fixing base of fixed lift pipe, square support body upper end is located lift pipe mouth of pipe front end is equipped with block net (3), the block net lower extreme is connected with the guide slot that downwardly extends to the square support body outside and pool limit, guide slot upper portion is dull and stereotyped guide slot (31), and the lower part is screen cloth guide slot (32).
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