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Calculation of Oxygen Demand in Aquaculture Water

เขียนโดย wateraerator
Theoretical requirements: fish need about 1 kg of oxygen to digest 1 kg of feed.
Oxygen production efficiency: 1 kWh of electricity   Water Jet Aerator manufacturecan produce about 3.6 kg of oxygen.
Natural productivity: Under the condition of no oxygen-enhancing equipment, the maximum fish-carrying capacity of the water body is 300 kilograms per mu. In fact, under extreme weather conditions, 150 kg of fish per mu will also lack oxygen.
Oxygen required for high-yield mode: (estimated yield per mu - natural fish load) x bait coefficient x 1 kg of oxygen. For example: the preset yield is 1000 kg per mu, the feeding rate is 3%, 21 kg of oxygen needs to be supplemented every day, the power consumption is about 5.8 degrees, 1.5 kilowatts (kw, the same below), and the aerator needs to work for 3.8 hours.
Oxygenation to save fish and maintain high yield: It is determined that per kilowatt of impeller aerator can add more than 1.8 kg of oxygen to the water per hour, which is enough for several tons of fish to breathe for 1 hour, and can solve the lack of oxygen in pond fish in time.
5. The effect of dissolved oxygen on aquatic animals
(1) When the dissolved oxygen content is ≤ (less than or equal to, the same below) 2 mg/L, the water body is easy to age, stink, float and suffocate. The critical oxygen for fish in ponds in my country is mostly between 1-2 mg/L.
(2) When the dissolved oxygen content is between 2-5 mg/L, although aquatic animals can survive normally, their growth is inhibited and it is not easy to produce high yields.
(3) When the dissolved oxygen is ≥ (greater than or equal to, the same below) 5-7 mg/L, the normal survival, reproduction and full growth of fish and related organisms can be ensured. When the dissolved oxygen is lower than the optimum range for a long time, aquatic animals' exercise ability decreases, food intake decreases, bait coefficient increases, resistance decreases, diseases increase, reproduction is hindered, etc., which have many adverse effects on organisms.
6. Principle of oxygen dissolution of aerator
The aerator itself cannot produce any oxygen. Its basic principle is to make the still water move, so that the water dissolves the oxygen in the air, and finally achieves the effect of increasing the oxygen content. The aerator is just a physical oxygenation method. I believe that many people with fish farming experience have encountered this situation. Sometimes the weather is hot and the fish will float up and become uneasy. As long as the aerator is turned on at this time, The poor condition of the fish will be significantly improved.