The oxygenator manufacturer introduces the working principle of oxygenators.


Release time:

2022-05-30

The main performance indicators of oxygenators, as introduced by oxygenator manufacturers, are oxygenation capacity and power efficiency. Oxygenation capacity refers to the amount of oxygen added to the water body per hour by a set of oxygenators, measured in kilograms per hour (kg/h). Dynamic efficiency refers to the amount of oxygen produced per unit of electricity consumed by the oxygenator, measured in kg/kWh. For example, a 1.5 kW waterwheel oxygenator has a power efficiency of 1.7 kg/kWh—meaning that for every 1 kWh of electricity consumed, the waterwheel can add 1.7 kg of oxygen to the water body.

   Aerator manufacturer Introduction Aerator The primary performance indicators are oxygenation capacity and power efficiency. Oxygenation capacity refers to the amount of oxygen added to the water body per hour by a set of aerators, measured in kilograms per hour; dynamic efficiency refers to the amount of oxygen produced per unit of electricity consumed by the aerator, measured in kg/kWh. For example, a 1.5 kW waterwheel aerator has a power efficiency of 1.7 kg/kWh, meaning that for every 1 kWh of electricity consumed, the aerator can add 1.7 kg of oxygen to the water body.

   Oxygenator Manufacturer Introduction Although aerators are widely used in aquaculture production, some fishery practitioners still lack a clear understanding of their operating principles, types, and functions, leading to blind and arbitrary practices in actual operations. Therefore, it’s essential to first grasp how these aerators work so that we can master their proper use in practice. As we all know, the primary purpose of using an aerator is to increase the concentration of dissolved oxygen in the water—a process that involves both the solubility and the dissolution rate of oxygen. These factors include oxygen solubility, water temperature, salinity of the water, and oxygen partial pressure. The dissolution rate, in turn, is influenced by three key factors: the degree of oxygen undersaturation, the surface area and method of contact between water and air, and the movement of the water itself. Among these factors, water temperature and salinity are relatively stable conditions of the aquatic environment and generally cannot be altered. The degree of oxygen undersaturation, however, is a factor that we can—and indeed must—actively adjust; it reflects the current state of the water body. Thus, to increase the oxygen content in the water, we need to directly or indirectly modify three critical factors: oxygen partial pressure, the surface area and method of contact between water and air, and the hydrodynamic conditions of the water. In light of this situation, Oxygenator Manufacturer Introduction The measures taken when designing an oxygenator are as follows:

  1) Use mechanical components to agitate the water body, promoting convective exchange and interface renewal;

  2) Disperse water into fine droplets and spray them into the gas phase, thereby increasing the contact area between water and gas.

  3) Use negative pressure to draw in gas, disperse it into microbubbles, and inject it into the water.

  Aerators of various types are designed and manufactured based on these principles. They either employ a single measure to promote oxygen dissolution, or adopt two or more measures.


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The relationship between water convection and dissolved oxygen levels in aquatic bodies: The introduction of an aeration device can effectively regulate dissolved oxygen levels.

Although fish floating to the surface can be caused by a variety of factors, in addition to excessive stocking density, overloading the total fish biomass, and poor water quality, the convective properties of water are also a major factor that cannot be overlooked. Simply put, when water temperature is low, its specific gravity (or density) increases, causing it to sink; conversely, when water temperature is high, its specific gravity (or density) decreases, making it float upward. Understanding and mastering the principles of water convection will greatly facilitate the smooth operation of aquaculture. On warm days, after being heated by the sun during the day, the warmer, lighter water tends to stay on top. As the sun sets and the air temperature begins to drop, the upper layer of water cools down, increasing its density, and gradually starts to sink. If the nighttime temperature remains relatively high, the water cools down slowly, and the upper layer won't reach the bottom of the pond until early morning. This is one of the main reasons why oxygen levels tend to drop sharply from late night into early morning on hot days. However, if a heavy rainstorm occurs in the evening, the situation changes dramatically. The cold, heavy rainwater quickly sinks to the bottom of the pond, stirring up sediment, leftover feed, fecal waste, biological residues, and other organic matter from the pond bottom and bringing them into the middle and upper layers of the water. These harmful organic substances rapidly deplete the dissolved oxygen in the water. Before dawn even breaks, the dissolved oxygen in the water may be completely used up, leaving the fish vulnerable to oxygen depletion and causing them to float to the surface—a phenomenon known as "floating and surfacing." Therefore, sudden heavy rainfall in the evening or at night can also lead to oxygen depletion and fish floating to the surface.

2020-11-12