All aquaculture professionals know that if there is not enough oxygen, the aquatic product species are susceptible to disease or even death. In the high-density culture of fish and shrimp, the amount of dissolved oxygen in the water determines the density of the organisms in the water. Even with good water quality, low dissolved oxygen will appear in the reservoir due to the large amount of nutrients and organic substances brought by feed and animal excreta. . Therefore, oxygenation is particularly important. The use of aerators can effectively supplement the dissolved oxygen in the pond. In the pond of the tanker type aerator, the upper water body lacks oxygen, but it is difficult to provide enough oxygen at the bottom of the pool, so the lack of oxygen is at the bottom of the pond. Oxygenation technology at the bottom of the pond utilizes the pipeline laid at the bottom of the pond to directly transport oxygen-containing air to the bottom of the pond. The oxygen from the bottom of the pond is added to the water to supplement the oxygen, so that the dissolved oxygen is maintained at the bottom of the water, preventing the lack of the bottom layer. Oxygen-induced water sub-hypoxia. The working principle of the bottom aeration system is through the Roots blower. The air is fed into the pond water through an aeration tube, the bubbles burst, and oxygen is diffused into the water to achieve oxygenation effect. The aeration action allows the water body to move up and down vertically. The rich dissolved oxygen produced by the surface photosynthesis of the water body is input to the bottom layer of the pond, and the dissolved oxygen level of the bottom water body is rapidly increased. The increase of dissolved oxygen level is conducive to the oxidation reaction of ponds, accelerate the decomposition of organic matter at the bottom of the pool, and effectively reduce the concentration of toxic and harmful substances such as sulfides, nitrites, ammonia nitrogen, etc. to achieve the effect of disease prevention and three-dimensional utilization of aquaculture waters. The growth effect of the bottom-living living animals such as prawns, crabs, river crabs, and shellfish and soft-shelled turtles. Due to the full use of energy for photosynthesis, the energy consumption of mechanical oxygenation is reduced and the effect of energy conservation is achieved.
1. Pond requirements
Farms should have appropriate electrical facilities or matching power equipment. The pond area of ​​South American white prawn should be 4.5-30 acres, square or rectangular (aspect ratio 2:1), water depth 1.5-2.5 meters, flat at the bottom. Breeding pond crab pond area 15 acres -30 acres, water depth 1.2 meters -2 meters, rectangular (3:1 aspect ratio). Other aquaculture object ponds can be implemented by reference.
2. Equipment requirements
Equipment includes blowers, power facilities (motors or diesel engines), galvanized steel pipes, micropipes or plastic (PVC) pipes, valve timing switches, etc., and should be equipped with water quality testing equipment.
(1) Blower: Roots blower or stacked blower should be selected. The quality of the Roots blower should meet the requirements of HJ/T225-2006, and the outlet air pressure should not be lower than 3500-5000 mm H2O.
(2) Pipeline: The main pipe is made of galvanized steel pipe or PVC pipe. The diameter of the main pipe is matched with the outlet diameter of the blower, generally 75 mm to 100 mm. Inflatable pipe selection micro air pipe or PVC pipe, inflatable tube diameter 10 mm -15 mm.
(3) Power configuration: The form of oxygenation is preferably in the form of a combination of oxygenation of micro-holes and water-wheeling oxygenation. The total power required for the aquaculture ponds of the South American white prawn pond is 0.35 kilowatts per mu, of which the microporous aeration facility is equipped with a power of 0.25 kilowatts per mu; the waterwheel aerator is equipped with a power of 0.1 kilowatts per mu; Oxygen facilities with a power of 0.1 kilowatts/mu or more are mainly based on microporous pipe oxygenation. Other aquaculture object ponds can be implemented by reference.
3. Equipment pipeline installation
(1) Blower installation. Install a gas distributor at the outlet of the blower or install an exhaust valve on the main pipe of the near blower.
Keywords---Fish Curd, Side Dish, Sauce, Pot, Boil
Ingredients:
Fish Curd, Side Dish(Dried Day Lily, Rice Noodle), Tomato Sauce
Directions:
1. Add 500ml of water along with tomato sauce pouch into a pot to boil.
2. Add the side dish into the pot and wait for 2-3 minutes
3. Add the fish curd into the boiling soup until they float(1-2minutes). Then pour the soup and the fish curd into a bowl before serving
Fish Beancurd,Frozen Fish Tofu,Chinese Fish Tofu,Chinese Fish And Tofu Recipe
Guangzhou Luxe Seafood Enterprises Ltd. , https://www.seafoodluxe.com