Kinetic analysis on rotating biological contactor treatment of organic matter

This paper adopts a 3-stage rotating biological contactor (RBC), studies kinetic analysis on RBC treatment of organic matter.Water temperature 25 degrees C and hydraulic retention time (HRT) 5h, COD concentration of influent varies from about 400 to 700mg / L, the average COD removal rate is 85%. According to Monod and Michaelis-Menten formula, organic matter removal kinetics equation in the first stage of RBC can be catched. When DO >= 2mg/L, organic matter removal kinetic equation: U-1=7.02S(1)/(S-1+640.70), DO<2mg/L, organic matter removal kinetic equation: U-2=35.97S(2)/(S-2+4848.92). Where U is substrate removal rate of unit area of disc, S is the organic matter concentration of substrate. Some reference values of the equation are very useful for practical application of RBC.