Abstract
It is necessary to take particle sedimentation into account, especially in the case of a gravitational pressure filtration.
The time for filtrating the slurry which has the settling tendency was found to be longer than that without sedimentation, because the filter cake is formed immediately and the maximum cake resistance is attained before the completion of filtration.
The ratio of filtrating duration to the duration necessary for filtrating the instantaneously settled slurry has been defined as τ and the following formula has been obtained to express the general filtrating characteristics, which agree well with the experimental results in the batch constant pressure filtration.
τ=1/φ[1+Ψ+φΨ/φ{exp(φ/1+Ψ·V/VE)-1}-V/VE]
