How can aquaculture oxygen production and oxygenation machines solve the problem of "fish deaths due to lack of oxygen" in high-density aquaculture?
Publish Time: 2025-10-23
In modern aquaculture, the pursuit of high yields and high efficiency has become the norm. High-density aquaculture is widely used for high-value species such as shrimp, grouper, California bass, and eels. However, as the stocking density per unit water body increases, the rate of dissolved oxygen depletion in the water accelerates, making the serious problem of "fish deaths due to lack of oxygen" highly likely. Especially at night, on rainy days, during hot weather, or during peak feeding periods, dissolved oxygen levels can plummet in a short period of time, causing fish to float, experience stress, weaken their immune system, and even die from mass suffocation, resulting in significant economic losses for fish farmers. Traditional impeller-type or waterwheel-type aerators rely on the diffusion of oxygen from the air, resulting in limited efficiency and unable to meet the oxygen supply requirements of high-density aquaculture. Aquaculture oxygen production and oxygenation machines, particularly integrated oxygen production and aeration systems, are becoming a key technological solution to this problem.
1. The Root Cause of Hypoxia in High-Density Aquaculture
In high-density aquaculture environments, dissolved oxygen in the water is primarily consumed by processes such as respiration by aquaculture organisms, decomposition of feed residues, and fermentation of organic matter in sediments. During the day, algal photosynthesis can partially replenish oxygen, but at night, photosynthesis ceases while respiration continues, causing dissolved oxygen to reach its lowest point in the early morning hours. Once dissolved oxygen falls below a critical value, it can cause flopping and even death. Traditional aeration equipment simply agitates the water surface to slowly dissolve oxygen from the air. Its oxygenation efficiency is significantly affected by air pressure, water temperature, and salinity, and its upper limit on oxygen concentration is limited, making it difficult to rapidly increase dissolved oxygen levels.
2. Pure Oxygen Supply: Breaking the Concentration Bottleneck of Air Aeration
The core advantage of aquaculture oxygen production and oxygenation machines lies in their "on-site oxygen generation + efficient oxygenation." The equipment utilizes molecular sieve pressure swing adsorption technology to separate high-concentration oxygen with a purity exceeding 90% from the air. This pure oxygen is then injected directly into the aquaculture water via microporous aeration tubes, nanotubes, or injectors. Compared to air aeration, this system improves oxygen dissolution efficiency per unit volume by 3–5 times, rapidly raising dissolved oxygen levels to a safe range of 6–8 mg/L in a short period of time, effectively addressing sudden hypoxia crises. Even on rainy days when algae are not producing oxygen, this system provides a continuous and stable oxygen supply, completely breaking the passive situation of relying on the weather for support.
Oxygen production systems are typically equipped with microporous nano-aerators, which evenly release pure oxygen into the water's bottom layer in the form of extremely fine bubbles. These small bubbles rise slowly, remain in contact with the water for a long time, and achieve an oxygen dissolution rate exceeding 85%. Furthermore, these bubbles drive upward and downward convection in the water, breaking down the thermocline, improving the hypoxic environment at the bottom, and suppressing the accumulation of harmful gases such as hydrogen sulfide and ammonia nitrogen, thereby improving water quality and reducing the risk of disease.
4. Intelligent Control: Achieving precise, efficient, and energy-saving operation
Aquaculture oxygen production and oxygenation machines integrate dissolved oxygen sensors and intelligent control systems for real-time monitoring of dissolved oxygen levels in the water. When dissolved oxygen falls below a set threshold, the system automatically activates oxygen production and aeration. Once the target value is reached, the system automatically shuts down, avoiding energy waste caused by excessive oxygen supply. Farmers can remotely monitor dissolved oxygen data, equipment status, and operating records via a mobile app, enabling scientific and refined management. Some systems also feature power outage warnings and backup power supply switches to ensure safe farming in extreme situations.
5. Improved Farming Efficiency and Reduced Risk Costs
Using an aquaculture oxygen production and oxygenation machine stabilizes water dissolved oxygen, promoting vigorous fish feeding, accelerating growth, improving feed conversion rates, and shortening the farming cycle. Furthermore, a high dissolved oxygen environment enhances aquatic animal immunity, reduces disease incidence, and reduces medication costs. Most importantly, it effectively prevents mass mortality due to hypoxia, ensuring stable farming returns.
The aquaculture oxygen production and oxygenation machine utilizes three core technologies: high-purity oxygen supply, efficient dissolved oxygen, and intelligent control. It fundamentally addresses the inefficiency and slow response of traditional aeration methods. It serves not only as a "safety valve" for emergency fish rescue but also as a "power engine" for high-yield, efficient, and healthy aquaculture. With the development of smart fisheries, oxygen production and oxygen enrichment technology will become standard equipment in modern farms, injecting strong impetus into the sustainable development of the aquaculture industry.
