Artificial clay biological ceramsite filter media is a granular material produced through a series of processes including ingredient selection, pelletization, high-temperature firing, crushing, and screening, using carefully selected high-quality clay as the primary raw material. In terms of physical microstructure, ceramsite filter media exhibits a rough surface with numerous micropores, making it particularly suitable for microbial growth and reproduction on its surface. Modern water treatment processes leverage these characteristics, making it an ideal filter medium for water treatment—especially for biological pretreatment of sewage and micro-polluted water sources, as well as drinking water filtration technology. Additionally, its moderate density, high strength, abrasion resistance, stable physicochemical properties, and non-release of toxic or harmful substances into water bodies make it the preferred filter medium in water treatment engineering.