... the enzymatic catalysis, so it possess excellences of larger specific surface, being easy to multiply biofilm, unease to fall off, high ... ²Effective area of 70% filling ratio350 m²/m³Total heaping surface area690 m²/m³Void ratio84.4 %Process Principal:The waste ... media of MBBR reactor, form the biological membrane on the surface of the media gradually, with the action of the microbial ...