There are many models of existing aerators in my country, but the impeller type aerators are mostly used in pond culture and fishery. The main reason for this is that the multiple functions of the impeller aerator, such as water stirring, oxygenation, mixing, and aeration, are more suitable for regulating the water quality of still water ponds, and the oxygenation efficiency is high. The impeller type aerator is currently the most efficient aerator among various domestic aerators, generally reaching 1.29 kilograms per kilowatt hour, and the highest can reach more than 2 kilograms. Each kilowatt of power can meet the oxygenation needs of 4 acres of fish ponds with a yield of 1,000 kilograms. That is to say, every kilowatt of power can provide 4,000 to 5,000 kg of adult fish with the oxygen necessary for survival.

At present, with the development of fish farming, the use of aerators has become very common, and the role of aerators in rescuing the floating heads of fish in ponds, improving water quality, increasing fish yield and breeding economic benefits has been affirmed, but how to scientifically and rationally The use of aerators to give full play to the effectiveness of aerators is not well understood by everyone. This article systematically introduces the use of aerators from the connotation of pond water quality regulation, the changing rules of dissolved oxygen in ponds, and the working principle of impeller aerators.

In the pond ecosystem, the amount of dissolved oxygen in the water is an important indicator of the quality of water quality. In the case of normal fertilization and feeding, the amount of dissolved oxygen in the water will not only directly affect the appetite and digestion and absorption capacity of fish. And dissolved oxygen is related to the growth and reproduction of aerobic bacteria. In the absence of oxygen, the reproduction of aerobic bacteria is inhibited, resulting in the decomposition of organic matter (animal and plant carcasses and residual bait, etc.) deposited at the bottom of the pond by anaerobic bacteria, producing a large number of toxic substances and organic substances that are harmful to fish. acid, which further deteriorates the water quality.

Sufficient dissolved oxygen can accelerate the nitrification of nitrogen-containing substances in water, so that ammonia nitrogen and nitrite nitrogen that are harmful to fish can be converted into harmless nitrate nitrogen, which can be used by phytoplankton. Promote the virtuous cycle of pond materials and play a role in purifying water quality.