Multimedia (Sand) Filtration Calculator

Multimedia (Sand) Filtration Calculator

Multimedia (Sand) Filtration Calculation
Parameter Value Unit
Surface Area, A:
Diameter, D: m
Backwash Flow Rate: m³/h
Backwash Duration: min
Bed Expansion: %
Headloss: kPa
Filtration Efficiency: %
Media Lifespan: years
Vessel Height: m
Media Sizing:  
Design Guidelines:
Maintenance and Monitoring:

Warning: iBottling cannot be held responsible for errors in the calculation, the program itself or the explanation. For questions or remarks, please contact our friendly iBottling support team.

How to Use the Multimedia (Sand) Filtration Calculator

  1. Input the Flow Rate: The first step is to enter the flow rate (q) of the water that needs to be filtered, in cubic meters per hour (m³/h). This is the key parameter that will determine the size and design of the multimedia filtration system. 14
  2. Input the Filter Bed Speed: The next input is the desired filter bed speed (v), which is typically between 10 m/h and 30 m/h, depending on the quality of the water being treated. Higher suspended solids or turbidity in the water will require a slower filter bed speed to ensure effective filtration. 134
  3. Input the Media Depth: The calculator will also ask you to enter the depth (L) of the multimedia filter bed, in meters (m). This is an important parameter as it affects the headloss and filtration efficiency of the system. 345
  4. Input the Media Effective Size: You will need to specify the effective size (d) of the filter media, in millimeters (mm). The recommended range is typically between 0.3 mm and 1.2 mm, with different media types (sand, anthracite, garnet) performing better within specific size ranges. 345
  5. Input the Media Porosity: The calculator will also require you to provide the porosity (ε) of the filter media, which is usually around 0.4 for multimedia filters. This parameter is crucial for determining the headloss across the filter bed. 34
  6. Input the Fluid Viscosity and Density: Finally, you will need to enter the viscosity (μ) of the fluid being filtered, in Pascal-seconds (Pa·s), and the density (ρ) of the fluid, in kilograms per cubic meter (kg/m³). These properties of the water being treated will affect the headloss and filtration efficiency calculations. 34

Once you have entered all the required information, the calculator will provide the following key design parameters:

  • Surface Area (A): The required surface area of the multimedia filter, in square meters (m²).
  • Diameter (D): The recommended diameter of the multimedia filter, in meters (m).
  • Backwash Flow Rate: The suggested backwash flow rate, in cubic meters per hour (m³/h).
  • Backwash Duration: The recommended backwash duration, in minutes.
  • Bed Expansion: The expected bed expansion during the backwash process, as a percentage.
  • Headloss: The estimated pressure drop across the multimedia filter, in kilopascals (kPa).
  • Filtration Efficiency: The expected filtration efficiency of the multimedia filter, as a percentage.
  • Media Lifespan: The estimated lifespan of the filter media, in years.
  • Vessel Height: The recommended height of the filter vessel, in meters (m).
  • Media Sizing Recommendation: Guidance on the appropriate media size and type to use.
  • Design Guidelines: References to industry standards and best practices for multimedia filtration systems.
  • Maintenance and Monitoring Recommendations: Suggestions for proper maintenance and monitoring of the multimedia filter.

By using this comprehensive Multimedia (Sand) Filtration Calculator, you can ensure that your filtration system is designed and sized correctly, optimizing its performance and efficiency. The detailed results and recommendations provided by the tool can help you make informed decisions about the selection, installation, and operation of your multimedia filtration system.

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Warning: iBottling cannot be held responsible for errors in the calculation, the program itself or the explanation. For questions or remarks, please contact our friendly iBottling support team.

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