filtratiedoorlaat

Filtratiedoorlaat is a term used in filtration technology and soil science to describe the ease with which filtrate—the liquid that has passed through a filter or membrane—can pass through a filter medium. It reflects the permeability of the medium to the filtrate under a driving force such as hydraulic pressure, concentration gradient, or gravity. In membrane filtration, filtratiedoorlaat is often expressed as flux, J, defined as the volumetric flow rate per unit area, at a given transmembrane pressure, or as a permeability coefficient in Darcy-type formulations. Units vary by field, commonly LMH (liters per square meter per hour) or m/s for permeabilities, and Pa·s/m for certain resistances.

Several factors affect filtratiedoorlaat, including pore size distribution, porosity, tortuosity, surface chemistry, temperature, and fouling. Fabrication quality and aging alter the pore network, changing the through-through capacity. Fouling layers and concentration polarization reduce filtratiedoorlaat over time, requiring cleaning or pretreatment.

Applications cover water and wastewater treatment, food and beverage filtration, pharmaceuticals and bioprocessing, and soil and environmental engineering. In soils, higher filtratiedoorlaat corresponds to faster infiltration and drainage, influencing irrigation efficiency and pollutant transport.

Related concepts include permeability, Darcy's law, selectivity, and fouling. Accurate assessment requires standardised test protocols to distinguish intrinsic material properties from operating conditions.