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The impeller aerator can meet the needs of large-area ponds, and the vertical depth of oxygen supply can meet the survival of waterfowls under 6 meters.
In the 1970s, due to technical limitations, the increase in the yield of pond fish farming encountered a bottleneck, mainly due to the lack of oxygen in the pond water, and the conventional aeration equipment at that time could not meet the demand, and it was impossible to crack the large number of fish caused by the high-yield floating head hypoxia The puzzle of death. Against this background, the Fishery Machinery and Instrument Research Institute of the Chinese Academy of Fishery Sciences (hereinafter referred to as the "Fishing Machinery Institute") undertook the subject of hypoxia in breeding ponds. After research and investigation, it was found that the oxygen content in the water can be increased by improving the aerator. And by simplifying the aerator, changing the fixed installation of the aerator to a floating type, changing the adjusted water level to a fixed water level, changing the speed regulation to a fixed speed, and eliminating the complicated water level adjustment device and speed regulation system, the oxygen addition can be further reduced The cost of the machine.
Many companies have cooperated with the Fishing Machinery Institute to develop the second and third generation impeller aerators, that is, the widely used three-island buoys in fish pond culture today, using gear reducers to drive the water shovel impeller. Among them, the 3kw and 1.5kw impeller type aerators are all popular general models, and the main force of the aquatic aeration machine in the past 30 years.