| This experiment was divided into two stages: Membrane-Circulated Moving Carrier Biofilm Reactor (M-CMCBR) was used to treat high-strength organic wastewater; Anoxic-aerobic biological treatment process was used to treat phenol wastewater.M-CMCBR was a new technology which combined biofilm process with membrane separation process. The experiment results showed that, with initial COD of 400～6000 mg/L, volumetric organic loading (NV) in M-CMCBR of 0.7～8.3 kgCOD/m3·d, the average effluent COD was less than 100 mg/L.During the process, the pressure was supplied by the difference of water levels, which saved the power consumption. This low- pressure operation can maintain high membrane flux and extend the operation cycle.In the test, the active sludge concentration was controlled by the value of F/M,which was controlled in 0.2～0.4 kgBOD5/kgMLVSS·d based on the conventional activated sludge process. The hydraulic characteristic and oxygen transfer in the M-CMCBR was tested, and the liquid-moving track was explained according to the liquid in reactor. In the anoxic-aerobic process, the anoxic baffled biofilm reactor (ABBR) was used to exert the function of hydrolytic acidification, after the treatment of ABBR the aerobic biodegradability of phenol wastewater was improved, and the BOD5/COD was slightly higher than 0.50.For phenol wastewater with the initial COD of 3000～5000mg/L, total HRT of 46.2h (19h in ABBR,27.2h in M-CMCBR) , the effluent COD was 30～90mg/L, and the total COD removal efficiency can reach to 98.5%～99.5%.Finally, models of total biomass concentration in M-CMCBR were established in this thesis. The theoretic value was compared with the experimental value, and the cause of discrepancy was analyzed as well as the significance of models was expounded.
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