What is the working principle of Roots blower aerator in aquaculture pond? The fishpond aerator is a kind of machine often used in fishery and aquaculture. Its main function is to increase the content of oxygen elements in the water, so that the fish in the water will not be anoxic, and at the same time, it will inhibit the growth of anaerobic bacteria in the water, prevent the deterioration of the pool water and threaten the living environment of the fish.
1. It starts at 2-3 pm in sunny days. At this time, the surface water layer more than 1 m high temperature, sufficient light, strong photosynthesis, dissolved oxygen reached supersaturation, power on the surface water layer dissolved oxygen mixed in other aquifers. In the water layer below 1 meter, the light will be darker, the temperature will be lower, photosynthesis will be weaker, dissolved oxygen will be less and less, and oxygen debt will be generated in the lower layer. At this time, start the pond aerator, stir the water, break the thermal layer, promote the water convection exchange between the upper and lower layers of the pond, fill the oxygen pool of the lower layer water, and maintain a reasonable dissolved oxygen content in the whole water area. The start-up time depends on how many water surfaces are loaded by the fishpond aerator. For example, the 3kW fishpond aerator load is 3-5 mu, and the water surface is opened for 30 minutes. If the load is 6-10 mu of water surface, please start the machine for 1 hour. After starting up in the afternoon on a sunny day, the storage of water-soluble oxygen in the pond is also increased due to the filling of oxygen in the lower water, and it is usually not necessary to start up again the next morning.
2. Start the machine in cloudy days. Generally, the machine will be started in the morning of the next day on cloudy days to directly stir water to increase oxygen. Due to weak photosynthesis in cloudy days, the water soluble oxygen reserve in the pond is small, and after night consumption, the water soluble oxygen in the pond may decline, leading to hypoxia of fish. Therefore, it is necessary to start the machine at 3~5 a.m., and if the fish are dense, it is necessary to pay for the time to start the machine.
If the rain continues or there is a serious risk of floating head due to fish density, the machine should be started before the fish float up. What we have learned is that when the fish and shrimp in the pond have floating traces, they will be turned on, usually around midnight. At this time, the oxygen content in the pond is very low. When the fish float head is opened again, there is no time to rescue, and the fish are easy to die.
No power on during the rainy season. Photosynthesis is weak in rainy season, and surface water soluble oxygen is not over saturated. At this time, start the machine and mix the supersaturated dissolved oxygen in the surface water at the bottom, which can not achieve the purpose of oxygen enrichment.
3. Generally, the pool water does not lack dissolved oxygen at night, so do not start the machine at night. If it is started, it will promote the convection mixing in the upper and lower waters of the fishing ground in advance, and accelerate the oxygen consumption rate. If the water quality deteriorates, be sure to turn on the machine. Do not shut down the machine again, and prepare to use oxygenator at the same time.
The fishpond aerator is a kind of machine often used in fishery and aquaculture. Its main function is to increase the content of oxygen elements in the water, so that the fish in the water will not be anoxic, and at the same time, it will inhibit the growth of anaerobic bacteria in the water, prevent the deterioration of the pool water and threaten the living environment of the fish.
Working principle of fishpond aerator:
The fishpond aerator is a device that can quickly transfer the "oxygen" in the air to the aquaculture waters by driving the working parts through power sources such as diesel engines or motors, and can comprehensively use physical, chemical, biological and other functions. It can not only solve the problem of fish floating head caused by insufficient oxygen in pond aquaculture, but also eliminate harmful gases, improve fishing ground activities and primary productivity, promote convection exchange in water areas, and improve water quality conditions. There are many types of aerators with different characteristics and working principles, greatly different oxygen increasing effects, and different applications. Producers can select appropriate aerators according to different breeding systems and the demand for dissolved oxygen to obtain good economic benefits.
The application of pond aerator in aquaculture production is more and more extensive, but some fishery practitioners do not understand its working principle, type and function, which is blind and arbitrary in actual operation. Here, only by understanding its working principle can we truly master its use. As is known to all, the purpose of using an aerator is to increase dissolved oxygen in water, which includes the solubility and dissolution rate of oxygen. Solubility includes water temperature, salt content of water and oxygen partial pressure. The dissolution rate includes three factors: the unsaturated degree of dissolved oxygen, the contact area and method of water air, and the movement state of water. The water temperature and salt content of the water are in a stable state of the water body, which cannot be changed generally. The unsaturation of dissolved oxygen is a factor that needs to be changed, and it is also the current state of the water. Therefore, in order to increase oxygen in water, it is necessary to directly or indirectly change the partial pressure of oxygen, the contact area and mode of water breath, and the movement state of water. In this case, the measures taken when designing the aerator are as follows:
1) The water is dispersed into small water droplets to spray the weather, and the water air contact area is increased.
2) Mechanical parts are used to stir the water to promote convection exchange and interface renewal.
3) The gas is dispersed into microbubbles and pushed into water through negative pressure suction.
Aquaculture aerator is designed according to these principles, and measures to promote oxygen dissolution or more than two measures are taken.
