Factors Affecting Filtration Speed？

In the filtration process, when the solid particles in the suspension are large and uniformly sized, the pores in the filter cake layer remain more open, allowing the filtrate to pass through at a higher speed. The use of coagulants to aggregate fine particles into larger clusters can help improve filtration speed.

For suspensions where solid particles settle quickly, using a filter that feeds from the top of the filtering medium ensures that the filtration direction aligns with gravity. This allows coarse particles to settle first, reducing clogging of the filtering medium and the filter cake layer. In hard-to-filter suspensions (such as colloids), adding coarser solid particles like diatomaceous earth or expanded perlite can make the filter cake layer more porous. When the filtrate viscosity is high, heating the suspension can reduce viscosity. These measures can all enhance filtration speed.