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The plan area of a sedimentation tank, often referred to as the surface area or settling area, is a crucial parameter in the design and operation of the tank. It determines the tank's capacity to allow particles to settle based on their settling velocity and the flow rate.
The calculator uses the formula:
Where:
Explanation: The formula calculates the required surface area for effective sedimentation based on flow rate and particle settling characteristics.
Details: Accurate area calculation is essential for designing efficient sedimentation tanks that effectively remove suspended particles from water treatment systems and industrial processes.
Tips: Enter discharge in m³/s and settling velocity in m/s. Both values must be positive numbers greater than zero for accurate calculation.
Q1: Why is the factor 70/100 used in the formula?
A: The 70/100 factor represents the efficiency coefficient that accounts for practical sedimentation tank performance and safety margins in design.
Q2: What is settling velocity?
A: Settling velocity is defined as the terminal velocity of a particle in still fluid, which depends on particle size, density, and fluid properties.
Q3: How does area affect sedimentation efficiency?
A: Larger surface area allows more time for particles to settle, improving sedimentation efficiency and removal rates.
Q4: What are typical values for settling velocity?
A: Settling velocity varies widely (0.0001-0.1 m/s) depending on particle size and density, from fine silt to coarse sand.
Q5: Can this formula be used for all types of sedimentation tanks?
A: This formula is generally applicable for primary sedimentation tanks, but specialized tanks may require additional considerations.