Filtratklarhet
Filtratklarhet, literally 'filtrate clarity' in Swedish, is a measure of how clear or transparent the liquid is after it has passed through a filtration process. It reflects the removal of suspended solids and colloidal material and is an important quality parameter in water treatment, pharmaceuticals, and food processing.
Measurement: Clarity is typically quantified by turbidity using nephelometric methods expressed in NTU; visual inspection is
Influencing factors: pore size and type of filtration media; filtration method (gravity, pressure-driven, cross-flow); upstream fouling;
Improvement: proper pretreatment, coagulation and flocculation, selecting appropriate filtration step and media, controlling filtration rate, regular
Applications and standards: in drinking water and wastewater treatment, a low turbidity is typically required; in
Limitations: turbidity measures suspended particles, not dissolved substances or color; visual assessment is subjective; correct sampling