The carrier has uniform color and no impurities. At the same time, the specifications and dimensions of common carriers (number of channels, diameter, height, wall thickness, etc.), carrier physical performance parameters (effective specific surface area, stacking bulk density, compression rebound, wear rate, compressive strength, void ratio, carrier density, etc. ), chemical performance parameters of organic biological carriers (calcium ions, acid loss, alkali loss, UV loss, etc.), biological performance parameters of organic biological carriers (biofilm amount, nitrification rate, organic matter removal rate, denitrification rate, heterotrophy, etc.) Respiration rate, autotrophic respiration rate, adenosine triphosphate activity, etc.) are illustrated in tabular form.