With the rapid development of my country's aquaculture industry, the promotion and application of industrial closed-loop aquaculture equipment in actual production, the production conditions of high-density and small water bodies have stricter requirements on water quality. If there is a lack of oxygen, these toxic substances can easily reach the level of harm. According to measurements, when the dissolved oxygen in water increases from 1.54mg/L to 2.2mg/L, the ammonia content drops from 0.4mg/L to 0.2mg/L, and the nitrite can drop from 0.04mg/L to 0.01mg/L. It can be seen that the importance of dissolved oxygen to water quality and the decisiveness of production cannot be ignored. How to choose a suitable aerator is very important. Traditional waterwheel-type, impeller-type and surface mechanical aerators are often limited to the surface or upper layer of water flow, with high energy consumption and low oxygenation efficiency. Each kilowatt of energy consumption can only produce less than two kilograms of dissolved oxygen. The aeration volume of the perforated pipe aeration is too small, the dissolved oxygen is low, and the return water volume is large, which is easy to block and often burn out the motor. The installation of the aeration plate is cumbersome, which affects the operation in the water and the fishing of the net during use. In addition, most products have a short service life, are not corrosion-resistant and aging-resistant, and are easy to block. We focus on the field of aquaculture oxygenation machinery and equipment. For many years, we have focused on the research and development of practical application effects, continuously improved the shortcomings of products in practical applications, and launched high-efficiency bubble oxygenation generators based on user feedback and needs. Features of high-efficiency bubble generators: Large specific surface area. Compared with 10-micron bubbles and 1-mm bubbles, the specific surface area of the former is theoretically 100 times that of the latter under a certain volume. The contact area between air and water has increased by 100 times, and the speed of various reactions has also increased by 100 times. The rise in pressure during the gradual shrinkage of the bubbles will increase the dissolution rate of the gas. With the increase in specific surface area, the shrinkage rate of the bubbles will become faster and faster, and finally dissolve into the water, and finally disappear and dissolve into the water, which can greatly increase the solubility of oxygen in water. Practice has proved that high-density intensive breeding and reasonable use of aerators have the following seven benefits: 1. Improve the oxygen conditions in the water of the general pond, especially the oxygen conditions in the lower layer of water The favorable factors of the depth of the intensive breeding pond can be fully utilized to truly play the role of "one inch of water, one inch of fish". 2. Prevent or reduce the floating of fish and shrimp When the fish and shrimp are seriously floating, the effect of the aerator is much faster, and it is not easy to cause dead fish and shrimp in the pond. 3. Accelerate the circulation of pond materials Due to the replenishment of dissolved oxygen in the lower layer of pond water, the aerobic bacteria in the lower layer of water and silt are rapidly multiplied, thereby accelerating the inorganicization process of organic matter in the lower layer of water and silt, and the increase of inorganic salts in the water. The organicization process of inorganic matter is inevitably accelerated to form new organisms. 4. Purify the water body Due to the accelerated circulation of materials in the pond, organic matter (including excrement, animal carcasses, etc.) that affects the life of fish and shrimp is converted into inorganic salts, creating a good living environment for fish and shrimp. 5. Stabilize water quality Due to the increase of dissolved oxygen in the water, the material circulation in the pond is fast, and the continuous replenishment of nutrients is accelerated, which creates good conditions for the reproduction of plankton, promotes the rapid exchange of plankton generations, and keeps the water quality "fat, active, tender and refreshing". 6. Create good conditions for increasing the amount of feeding and fertilization Due to the improvement of dissolved oxygen conditions in pond water, the speed of material circulation is accelerated, thereby further improving the effect of fertilization, promoting the metabolism of fish, and is beneficial to the growth of fish and shrimp, and improving the utilization rate of bait. 7. It is beneficial to prevent and control fish and shrimp diseases Due to the increase of dissolved oxygen in pond water, the physique of fish and shrimp is good and the growth is fast, which will inevitably enhance the resistance of fish and shrimp to diseases, and the incidence rate will also decrease accordingly.
