A New Method of Increasing Oxygen in Fish Culture--Micropore Tube Oxygen Enrichment
The aeration at the bottom of the micropore pipeline in the pond can effectively improve the dissolved oxygen in the pond, the dissolved oxygen distribution is uniform, and the aeration range is wide, and is especially suitable for benthic aquatic animals such as river crabs, prawns, fish and the like. Micropore pipeline oxygenation technology can appropriately increase pond culture density, increase culture yield and increase economic benefits.
1. The principle of micropore oxygenation uses Roots blower to send air into the gas transmission pipeline, the gas transmission pipeline sends air into the micropore pipe, the micropore pipe disperses the air into the water in the form of microbubbles, the microbubbles float upward from the bottom of the tank, the bubbles fully dissolve oxygen into the water under the action of high oxygen partial pressure of the gas, and can also cause the water flow to rotate and flow up and down, the up and down flow of the water flow brings the water rich in oxygen from the upper layer into the bottom layer, and the rotating flow of the water flow diffuses the water rich in oxygen around the micropore pipe outward, thus realizing uniform oxygenation of the pool water.
2. Micropore oxygenation facilities of microporous pipeline structure mainly consist of main machine (motor), Roots blower (rotating speed 1400 rpm), gas storage buffer device, main pipe (PVC plastic pipe), branch pipe (PVC plastic pipe or rubber hose), aeration pipe (microporous nano aeration pipe), etc.
3. The microporous pipeline is equipped with a main machine belt to drive a Roots blower, which is connected with a gas storage buffer device, which is connected with a main pipe, which is connected with a branch pipe, and the branch pipe is connected with an aeration pipe. Each 667 square meters is equipped with a blower with a power of 0.1 kilowatts. The total length of aeration pipes is about 60 meters, and the pipe spacing is about 10 meters. The height difference is not more than 10 centimeters. After fixing, the aeration pipes are 10-15 centimeters from the bottom of the tank.
4. The use method of micropore oxygenation determines the time and period of starting oxygenation according to the change rule of dissolved oxygen in water. Generally from April to May, the machine will start in the middle of the night on rainy days. In the afternoon of June to October, the system will be switched on for 2 to 3 hours, one hour before sunrise for 2 to 3 hours, in continuous rainy or low-pressure weather, the system will be switched on at 9 o'clock at night until noon on the second day; Start the machine frequently at the later stage of aquaculture to promote the growth of aquaculture objects. Dissolved oxygen detection shall be carried out conditionally, and the machine shall be turned on timely to ensure that dissolved oxygen in the water body is 6-8 mg per liter.
5. Micropore oxygenation has the first characteristic, silence and no interference. The rising process of microbubbles in the underwater micropore aeration pipe is slow, and the tortuous passage with tiny openings in the pipe wall is an air micropore pipe with slow speed, small resistance, dense holes, basically no sound on the water surface, and no interference to the normal activities of fish, shrimp and crabs. Second, the oxygenation effect is good.
Microbubbles in microporous tubes increase oxygen. Microbubbles can rapidly increase the oxygen content in water, so the oxygen enrichment efficiency is high and the effect is good. Especially for high-density cultivation in rainy days, the adoption of micropore oxygenation can immediately solve the phenomenon of anoxia floating head of fish schools and achieve the effect difficult to achieve by aeration of water surface impellers.
Third, the cost of energy consumption is low. Due to the adoption of the micropore aeration oxygenation device, the oxygen transmission efficiency is extremely high, so that the dissolved oxygen in a unit water body can quickly reach about 4.5 milligrams/liter, the energy consumption is less than 1/4 of that of a water wheel or an impeller, and the electricity cost of farmers can be greatly saved.
Microporous pipelines can not only rapidly and uniformly supply dissolved oxygen to every corner of the pond, but also restore the self-purification function of the water body.
Aquaculture water body is mainly anoxic at the bottom of the water body, and refractory organic matters such as fertilizer mud, organic excrement and residual deteriorated bait deposited at the bottom of the water body will consume a large amount of oxygen, and sufficient micropore aeration and oxygenation will convert it into organic matters dissolved and decomposed by microorganisms, thus stabilizing and restoring the water quality of the water body, creating a suitable growth environment for fish, shrimp and crabs, reducing the generation of stress and other diseases, improving the survival rate, and increasing appetite and growth speed.
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