How should aquaculture farmers use wave pumps effectively?

Aquaculture experience tells us that aerators should be run for 2-3 hours at midday on sunny days to reduce oxygen debt. Wave pumps and impeller aerators are commonly used aeration machines in pond aquaculture, but how effective are they in sunny weather, what is their impact, and how can they be used most cost-effectively?

In Pond #3 at the Tianmen Chenhu Base in Hubei Province, with a water depth of approximately 2.5 meters, the dissolved oxygen difference between the surface and bottom layers can reach over 15 mg/L under natural conditions on sunny days, as shown in Figure 1. If the surface layer is consistently oversaturated with dissolved oxygen while the bottom layer is deficient, it is both wasteful and potentially harmful. Therefore, aeration or water stirring at the bottom of the pond is of great importance.

To support this point, technicians from Tongwei Co., Ltd.'s testing center conducted a comparative experiment on this pond using a wave pump and an impeller aerator under sunny, windless or light wind conditions. The impeller aerator had a power of 3 kW, and the wave pump had a power of 0.75 kW. The machines were operated from 12:00 PM to 3:30 PM. 

In summary, both impellers and wave generators can eliminate the oxygen difference between the surface and bottom layers, thus achieving the purpose of water agitation. Furthermore, when the surface dissolved oxygen is sufficient, using a wave generator to agitate the water is more energy-efficient.