keramikpellets

Keramikpellets, or ceramic pellets, are small, fired ceramic particles used as media in filtration, catalysis, and related processes. They are typically produced from aluminosilicate clays, silica, or alumina and formed into beads or single pellets before being fired to high temperatures. The resulting bodies are rigid, chemically inert, and highly porous, with rough surfaces that provide extensive internal surface area.

Common applications include water and wastewater treatment, where the pellets act as biofilm carriers in fixed-bed or moving-bed reactors, enabling beneficial bacteria to colonize and oxidize pollutants such as ammonia and nitrite. In aquaculture, they are used to maintain water quality by supporting microbial communities. In chemical engineering, ceramic pellets serve as catalyst supports and packing materials in packed-bed reactors and adsorption columns, thanks to their stability under harsh conditions and ability to withstand high temperatures and wide pH ranges.

Key properties include high mechanical strength, thermal stability, chemical inertness, and large surface area relative to volume. They can be glazed or unglazed, and sizes vary from a few millimeters to several centimeters, depending on the application. Porosity and surface texture can be tailored during production by adjusting raw materials and sintering conditions.

Limitations include higher cost compared with plastic media and potential brittleness, which requires careful handling and avoidance of mechanical shock. Small fines can shed during use, necessitating periodic cleaning or replacement. Proper selection depends on the specific process, including flow rates, chemical environment, and whether backwashing or regeneration is needed.