... it improves the enzymatic catalysis, so it possess excellences of larger specific surface, being easy to multiply biofilm, difficult falling off, ... *12Weight per m3(kg)13014015512595Number of unites per m3666,3401038,0001038,700341,000135,300Specific surface area(m2/m3)>693>845 ... mmEffective Heaping area500 m²/m³Total surface area of each one670 m²/m²Total surface area of 70% filling ratio480 m²/m³ ...