The use of aerators must be combined with water quality. Only according to the internal laws of water quality changes, combined with the different roles (emphasis) of aerators operating in different situations, and reasonably determining the start-up and operation time, can oxygenation be fully utilized machine performance. They are discussed separately below.
1. Oxygenation
The oxygen-enhancing effect and effect of the aerator can only be manifested at night and in the early morning when the dissolved oxygen in the pond is low. Considering that the oxygen-enhancing value of the aerator is only a little more than 1 kilogram per kilowatt-hour, which is related to the balance of oxygen in the pond. The specific effect is very small, so the boot should be made up before the "floating head" or with an extended time. In production, the floating head of wild fish can be used as an indicator. The machine is turned on before the floating head of domestic fish. After dawn, the dissolved oxygen in the phytoplankton camping photosynthesis pool increases and the phenomenon of floating head disappears, and then the machine is stopped.
2. Aeration
Whether it is turned on at night or in the early morning, or at noon on a sunny day, the agitating and hydraulic action of the aerator accelerates the escape rate of toxic gases (hydrogen sulfide, ammonia, methane, sulfur dioxide, etc.) in the water. Played a role in purifying water.
3. Mix
At noon on a sunny day, due to the strong photosynthesis of phytoplankton in the upper water layer, the dissolved oxygen in the upper water layer can be supersaturated, while the bottom layer is in an oxygen-deficient state. At this time, when the machine is turned on, the pool water can be mixed evenly in a short time. The high oxygen water in the upper layer is sent to the lower layer, which accelerates the mineralization process of the organic matter in the lower layer and the material circulation of the pond; this not only fundamentally improves the oxygen condition of the lower layer water, but also reduces the amount of harmful substances produced by the decomposition of anaerobic bacteria and the oxygen debt. ; And it plays an important role in reducing the floating head in the next morning. For this reason, in the fish growing season, we must seize every sunny day and insist on starting at noon in order to seize the initiative to improve water quality.
However, when the machine is turned on at noon on a sunny day, it also accelerates the escape rate of dissolved oxygen. However, due to the strong use of the aerator to stir the water and the rapid update of the liquid level, the escape amount of this part is not high. The output is only 0.77 kg per kWh. Most of the dissolved oxygen can still diffuse to the lower layer through the stirring and mixing of the aerator. Therefore, booting at noon on a sunny day still has more advantages and fewer disadvantages, and you can start it with confidence.
On cloudy or rainy days, the photosynthesis of phytoplankton is not strong, the oxygen production is not much, and the oxygen consumption factor is not reduced, so that the supply of dissolved oxygen exceeds the demand, resulting in the deterioration of the oxygen conditions in the pond. Especially in cloudy and rainy days, the supplementary amount of dissolved oxygen is less, which can cause fish to float seriously. Therefore, it is necessary to give full play to the oxygen-enhancing effect of the aerator, and turn it on in time before the fish floats to directly improve the low peak value of dissolved oxygen. prevent accidents.
There is a proverb about the optimum startup time and operation time of the aerator, which generally points out the reasonable use of the aerator. It has a certain guiding role in production, which is now introduced as follows:
①Starting time: open at noon on sunny days, open in the early morning on cloudy days, not open in the evening, open before the floating head, open in the middle of the night with continuous cloudy rain, and insist on opening every day in the main growing season of fish.
②Operating time: The startup time in the middle of the night is long, and the startup time at noon is short. Fertilization, hot weather, large load area of ​​aerator, and long startup time, no fertilization, cool weather, small aerator load area, short startup time.