Abstract: Synthetic dying wastewater was treated by immobilized biological activated carbon in multistage baffled bioreactor. The water quality of effluent was stable and peptide bond of alkenes was shorted. The COD_Cr removal ratio and BOD5 removal ratio were 96.46% and 99.77%. The removal ratio of total sulfate radical and magnesium ion exceeded 80.37% and 78.66%. Volumetric loading rate of baffled reactor reached 2.8 kg COD/(d•m³). The treatment effect wasn’t impacted after the biological immobilized of activated carbon, further more the service life of activated carbon was prolonged greatly. Immobilized biological activated carbon could afford shock loading and recover soon.

Key words: immobilized biological, activated carbon, dying wastewater