Recommendations
Atmospheric pressure given altitudeGate and valve adjacent to the filter: recomended dimensionsHead loss in the filter bed during washingHead loss coefficient of a partially open butterfly valveFiltralite filter media: Payback determinationSALUTAR anaerobic filter
Expansion of the filter bed
Default

Input data

Temperature

Effective size

Uniformity coefficient

Specific weigth

Porosity

Length (a)

Width (b)

Diameter (D)

Depth of the filter bed

Washing velocity

Output data

Expanded bed depth

Expansion

Description

Givem the temperature, the dimensions of the filter bed, the physics and granulometric characteristics of its media and the washing water velocity , calculates the percentual expansion of the media ant its expanded depth.

References

  • AMIRTHARAJAH, A; CLEASBY, J. L. Predicting expansion of filters during backwash. Journal AWWA, v. 64, n. 1, p. 52-9, jan. 1972.