Start / Livestock and aquaculture / Fish farming
See how much oxygen the biomass consumes per day and the aerator power that meets this demand.
Pre-sizing and estimating tool: the results do not replace a design, calculation, or report signed by a qualified professional, nor verification against the applicable standards.
Technical responsibility. This calculator is under verification. The reference values and examples are hypothetical, to illustrate the calculation, and are not technical references. The user is responsible for the data entered, the choice of parameters, and the use of the results, and must validate them with a qualified professional before any decision, purchase, application, or construction work.
Aerator power for biomass of 500 to 3,000 kg, with the rate and efficiency you entered; the highlighted bar is yours.
Power for rates of 200 to 600 mg O₂/kg/h; the dot is your rate.
Drag the controls to simulate data different from what you entered (from 30% less to 30% more) and watch the result change instantly.
Aerator power, in kW, for different biomass levels and efficiencies, with the oxygen consumption rate you entered.
The calculation done in steps, with the values you entered.
The calculation memo gathers this page's inputs, results, equations, assumptions, and references, with fields for project, responsible person, and review. The full report also includes the charts and interpretations, in color. In the print window, choose Save as PDF.
Enter the pond's total biomass, the species' oxygen consumption rate (in mg O₂ per kilo per hour), the aerator efficiency (in kg of O₂ per kWh, given by the manufacturer), and the operating hours. The calculator shows the oxygen demand and the power.
Biomass of 2,000 kg, rate of 300 mg O₂/kg/h, aerator of 1.2 kg O₂/kWh and 12 hours of operation.
O₂ per day = 2,000 × 300 × 24 ÷ 1,000,000 = 14.4 kg/day. Per hour = 0.60 kg/h. Power = 0.60 ÷ 1.2 = 0.50 kW. Energy = 0.50 × 12 = 6 kWh per day.
It depends on the species, the weight, the temperature, and the feeding level. Use the species' literature values and confirm with oxygen measurements in the pond.
Because the manufacturer measures in clean water under standard conditions. In real water, oxygen transfer is lower, and the actual power must be higher.
No. Measure dissolved oxygen, especially at dawn and on cloudy days, which are the times of greatest risk.
It depends on the area, the depth, and how the oxygen is distributed. The calculation gives the total power; splitting it among aerators is a separate design task.
Important notice: the Agrocalcs tools make estimates and preliminary sizing based on the data entered and on published engineering methods. They do not replace a design, a calculation report or a report signed by a qualified professional (CREA/ART), nor verification against the applicable technical standards and legislation, such as the Regulatory Standards of the Ministry of Labor. Material and fuel properties vary: check with the manufacturer or with analyses of your process before deciding. By using the site, you agree to the Terms of Use.
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