Analysis of the use of aerators
Aerators are a common Machines used in fish farming. Its main function is to increase the oxygen content in the water to ensure that the fish in the water will not be hypoxic, and at the same time, it can inhibit the growth of anaerobic bacteria in the water, and prevent the deterioration of the pool water from threatening the living environment of the fish. The aerator generally relies on its own air pump to drive air into the water to achieve the purpose of increasing the oxygen content in the water.
Analysis of the use of aerators:
Improvement to the pond
Main performance In:
When the fish pond is deficient in oxygen, turn on the aerator to prevent the fish and shrimp from “floating head”. When the upper layer of dissolved oxygen is high on sunny days, it can accelerate the convection of the water body, increase the dissolved oxygen in the middle and lower layers of the water body, which is conducive to the rapid growth of fish and shrimp, reduces the bait coefficient, promotes the oxidative decomposition of organic matter, and reduces the occurrence of diseases. In addition, the circulating flow of the water body also promotes the reproduction and growth of plankton and improves the primary productivity of the pond.
It can be seen that the function of the aerator is not only to increase the oxygenation of the water body, but also to effectively promote the improvement of the primary productivity and self-purification ability of the pond, thereby improving the water quality and ecological environment of the pond. The water circulation flow produced by it is not suitable for the living habits of some aquaculture objects such as eels and shrimps, but it has a good effect on promoting the health and rapid growth of fish and shrimp.
Shrimp farm configuration
The configuration of the aerator mainly depends on the water source condition, the breeding density, and the total energy consumption of water intake and drainage.
Water source status: Whether the water source is abundant, and whether the water quality has been kept good;
Breeding density is the yield per mu: if it is high, it will be used more, and if it is low, it will be less.
Drainage energy consumption: If the energy consumption of water intake and drainage is low, the oxygen aerator can be considered to be configured less;
Economic analysis: Consider the relative ratio of electricity bill and shrimp price. If the local electricity bill is relatively high and the price of shrimp is relatively low, consider less allocation; otherwise, allocate more.
Apply Foreground
China is a major fishery producer in the world. For the past 20 years, its fishery output has been in the forefront of all countries in the world. The total output value of domestic fishery has accounted for 10% of the country’s total agricultural output value. China’s aquaculture has gradually developed in the direction of high density and intensification, and the total output of aquaculture is increasing year by year, which is inseparable from the gradual realization of mechanization in the aquaculture industry, especially the widespread use of aerators. It can be said that the aerator is an indispensable basic equipment for China to realize the modernization of fishery.
Principles of use
⑴Turn on the aerator for 1-2 hours at noon on a sunny day, give full play to the aerator’s water stirring effect, and increase the dissolved oxygen in the pool water. And accelerate the pond material circulation, improve water quality, reduce the occurrence of floating heads. Be sure to avoid turning on the machine in the evening on sunny days, which will cause the upper and lower water layers to convection in advance, increase the oxygen-consuming water layer and oxygen consumption, and easily cause fish to float.
⑵In cloudy and rainy days, the photosynthesis of phytoplankton is weak, and the dissolved oxygen in the pool water is insufficient, which is easy to cause floating heads. At this time, it is necessary to give full play to the mechanical oxygenation effect of the aerator, and start the aerator early at night to directly improve the dissolved oxygen in the pool water, so as to prevent and rescue the floating head of the fish. Avoid turning on the machine at noon on cloudy and rainy days. Turning on at this time will not only increase the dissolved oxygen in the lower water, but also increase the consumption of dissolved oxygen in the pond, which will easily cause fish to float.
⑶ In summer and autumn, the water temperature is high during the day, the biological activity is large, and the oxygen consumption is high. Generally, it can be turned on properly at dawn to increase the dissolved oxygen. If there is a warning of floating head, turn on the machine for emergency, and cannot stop until after sunrise, when there are no fish on the water.
⑷ When the water quality is too fertilized after a large amount of fertilization, a combination of starting at noon on a sunny day and starting at early morning should be used to improve the dissolved oxygen conditions in the pool water and prevent floating heads. The use of aerators is not only related to the above weather, water temperature, and water quality, but also should be combined with the specific conditions of fish farming, according to the changing rules of dissolved oxygen in the pool water, and flexibly grasp the startup method and startup time, so as to achieve rational use, increase efficiency and increase production. .
In short, the principle of using the aerator: open at noon on sunny days, open in the morning on cloudy days, open in the middle of the night on continuous rainy days, not open in the evening, not open during the day on cloudy days, and open the floating head early; The weather is cool and the startup time is short, the startup time in the middle of the night is long, the startup time at noon is short, the startup time is long when the load area is large, and the startup time is short when the load area is small, ensuring timely oxygenation.
Notes:
In today’s scientific fish farming, The use of pond aerators by many fish farmers lacks science, which directly affects the use of aerators. The rational use of aerators can effectively increase the amount of dissolved oxygen in the pond water, accelerate the circulation of pond water, eliminate harmful substances, and promote the reproduction of plankton. At the same time, it can prevent and reduce fish floating, prevent flooding and improve the water quality of ponds, increase fish food intake and increase yield per unit area. So here are some things to pay attention to when using the aerator correctly.
1. How to determine the type
Determine the loading load in general Consider water depth, area and pool shape. The waterwheel type is the best for rectangular ponds, and the impeller type is better for square or circular ponds; the impeller type aerator can basically meet the oxygenation needs of 3.8 mu of adult fish ponds per kilowatt of power, and the installation of fish ponds above 4.5 mu should be considered. More than two aerators.
2. Installation location
The aerator should be installed In the center of the pond or on the windward position. Generally, it is more than 5 m away from the pond embankment, and is fixed by inserting rods or anchoring. When installing the impeller aerator, it should be ensured that the water flow generated by the aerator during operation will not stir up the sludge at the bottom of the pool. In addition, pay attention to safe use of electricity during installation, take protective measures for safe use, and check and maintain frequently.
3. Start and run time
Aerator It must be operated under safe conditions, and combined with the stocking density of fish in the pond, the growing season, the water quality conditions of the pond, weather changes, and the working principle, main function, aerobic performance, aerator load, etc. of the aerator Factors to determine run time so that it works without wasting. To correctly grasp the boot time, it is necessary to achieve “six open and three no open”. That is, “six-open”: 1) Turn on in the afternoon when it is sunny; 2) Turn on the next morning when it is cloudy; 3) Turn on in the middle of the night when it is rainy; 4) Turn on in the middle of the night when it rains heavily; Turn on at any time under special circumstances. “Three off”: 1) Do not turn on after sunrise in the morning; 2) Do not turn on in the evening; 3) Do not turn on during the day on cloudy and rainy days.
In the event of sudden changes in weather or fish floating heads due to water and fat fish, you can flexibly control the boot time to prevent floating heads or flooding.
4. Periodic Inspection
For safe operation, it is necessary to Regular maintenance of the aerator. The motor, gear box, impeller and float should be overhauled. The junction box that has been corroded by water should be replaced in time. At the same time, the overhauled parts should be placed in a ventilated and dry place, and then installed as a complete machine when necessary. .
