filtratiecake

Filtratiecake refers to the solid layer that forms on a filter medium during filtration of a slurry or suspension. It consists of the retained particles and the liquid occupying the pore spaces within the cake. The term is used in filtration theory and process engineering to describe the accumulating solids on the filter.

Formation and properties: As filtration proceeds, particles deposit on the filter and pack to form a cake whose thickness grows with time. The cake's porosity, density, and compressibility depend on particle size distribution, shape, solids loading, and filtration pressure. The cake adds hydraulic resistance, causing the filtration rate to decline over time.

Modeling and operation: Filtration rate is determined by the hydraulic resistances of the filter medium and the cake. The specific cake resistance and cake compressibility describe how the cake impedes flow under pressure. In practice, operators can wash, dewater, and dry the cake to achieve desired purity and moisture content. Filtration cycles may alternate between filtration, washing, and cake discharge.

Applications and significance: Filtration cakes are encountered in industrial filtration, including beverage clarification, chemical production, wastewater treatment, and mineral processing. The properties of the cake influence product quality, filtration cost, and energy consumption. Understanding cake formation helps optimize filtration performance, control final dryness, and improve overall process efficiency.