Fish pond aerator is a machine commonly used in fisheries and animal husbandry. Its main function is to increase the oxygen content in the water to ensure that fish in the water do not lack oxygen, while also inhibiting the growth of anaerobic bacteria in the water and preventing the deterioration of the pool water from threatening the living environment of fish. Fish pond aerators generally rely on their built-in air pump to inject air into the water, in order to increase the oxygen content in the water.

Fish pond aerator is a device that drives working components through power sources such as electric motors or diesel engines to quickly transfer "oxygen" from the air to the aquaculture water. It can comprehensively utilize physical, chemical, and biological functions, not only solving the problem of fish floating heads caused by hypoxia in pond aquaculture, but also eliminating harmful gases, promoting water convection and exchange, improving water quality conditions, reducing feed coefficient, increasing fish pond activity and primary productivity, thereby increasing stocking density, increasing feeding intensity of aquaculture objects, promoting growth, and significantly increasing yield per mu, fully achieving the goal of increasing aquaculture income.

There are also many types of fish pond aerators, each with different characteristics and working principles. The aerating effect varies greatly, and the scope of application is also different. Producers can choose the appropriate fish pond aerator according to the dissolved oxygen requirements of different aquaculture systems to achieve good economy.

Main purpose

1. Improvement of pond

When the fish pond lacks oxygen, turning on the fish pond aerator can prevent fish and shrimp from floating. When the upper dissolved oxygen is high on a sunny day, turning on the machine can accelerate the convection of the water, increase the dissolved oxygen in the middle and lower layers of the water, facilitate the rapid growth of fish and shrimp, reduce the feed coefficient, promote the oxidation and decomposition of organic matter, and reduce the occurrence of diseases. In addition, the circulation and flow of water also promote the reproduction and growth of plankton, improving the primary productivity of ponds.

It can be seen that the function of the fish pond aerator is not only to aerate the water body, but also to effectively promote the improvement of primary productivity and self purification capacity of the pond, thereby improving the water quality and ecological environment of the pond. The water cycle flow generated by it is not suitable for the living habits of certain aquaculture objects such as eels and shrimp, but it has a good effect on promoting the health and rapid growth of fish and shrimp.

2. Shrimp farm configuration

The configuration of fish pond aerators is mainly determined by factors such as water source conditions, aquaculture density, and total energy consumption of inflow and outflow.

① Water source condition: whether the water source is abundant and whether the water quality has always been good. If the water quality is good, consider mixing less, otherwise mix more, and only change the water more when the water quality is good.

② Breeding density refers to the yield per mu: high yields result in more breeding, while low yields result in less breeding.

③ Drainage energy consumption situation: If the energy consumption of inflow and outflow is relatively low, the fish pond aerator can be considered to be equipped less. The energy consumption is high, and the configuration should be large.

④ Economic analysis: Consider the relative ratio of electricity and shrimp prices. If the local electricity bill is relatively high and the shrimp price is relatively low, consider reducing the allocation. On the contrary, there are more configurations.

3. Application prospects

China is a major producer of fisheries in the world, with fisheries output consistently ranking among the top in the world for the past 20 years. The total output value of domestic fisheries accounts for 10% of the country's total agricultural output value. China's aquaculture has gradually developed towards high-density and intensive direction, and the total output of aquaculture has been increasing year by year. This is closely related to the gradual mechanization of aquaculture, especially the widespread use of fish pond aerators. It can be said that fish pond aerators are essential basic equipment for China to achieve modernization in the fishing industry.

Working principle

The main performance indicators of the fish pond aerator are defined as aerating capacity and power efficiency. Oxygenation capacity refers to the amount of oxygen added to the water by a fish pond aerator per hour, measured in kilograms per hour. Power efficiency refers to the amount of electricity consumed by a fish pond aerator to aerate water, measured in kilograms per kilowatt hour. If the 1.5-kilowatt water truck fish pond aerator has a power efficiency of 1.7 kg/kWh, it means that the machine consumes 1 kWh of electricity and can add 1.7 kg of oxygen to the water body.

Although the use of fish pond aerators in aquaculture production is becoming increasingly widespread, some fishery practitioners still do not understand their working principles, types, and functions, and exhibit blindness and arbitrariness in practical operations. It is necessary to first understand its working principle here, so that one can master its usage in practice. As is well known, the purpose of using fish pond aerators is to increase dissolved oxygen in the water, which involves the solubility and dissolution rate of oxygen. Solubility includes three factors: water temperature, salt content, and oxygen partial pressure. The dissolution rate includes three factors: the degree of unsaturation of dissolved oxygen, the contact area and mode between water and gas, and the movement of water. The water temperature and salt content are stable conditions of the water body, which are generally unchangeable. The degree of unsaturation of dissolved oxygen is the factor we need to change, and it is also a current condition of the water body. So to achieve oxygenation of water bodies, three factors must be directly or indirectly changed: oxygen partial pressure, contact area and mode between water and gas, and water movement status. In response to this situation, the measures taken when designing a fish pond aerator include:

1. Using mechanical components to stir water bodies, promoting convective exchange and interface renewal.

2. Disperse water into small droplets and spray them into the gas phase to increase the contact area between water and gas.

3. By negative pressure inhalation, the gas is dispersed into microbubbles and pressed into water.

Various types of fish pond aerators are designed and manufactured based on these principles, either by taking a measure to promote oxygen dissolution or by taking two or more measures.

Precautions

Today, in the era of scientific fish farming, many fish farmers lack scientific methods when using pond aerators, which directly affects the effectiveness of their use. Reasonable use of fish pond aerators can effectively increase the dissolved oxygen content in the pond water, accelerate the circulation of substances in the pond water, eliminate harmful substances, and promote the reproduction of plankton. At the same time, it can prevent and reduce fish head floating, prevent flooding, improve pond water quality conditions, increase fish feeding and increase yield per unit area.