Calculations
Recommendations
SALUTAR anaerobic filterSodium hypochlorite generator (ACQUANOX®)Filter balance: one weir per filterHead loss in stratified clean filter bedHead loss in the filter bed during washingFilters: washing volumeWell-rounded inletExpansion of the filter bed
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.
Filter bed
References
- AMIRTHARAJAH, A; CLEASBY, J. L. Predicting expansion of filters during backwash. Journal AWWA, v. 64, n. 1, p. 52-9, jan. 1972.