Abstract: Beer wastewater treatment using threephase biofluidized bed has been studied by experiments, and the effects of aeration quantity and hydraulic stay time on treatment efficiency have also been discussed. The result shows that the optimal aeration quantity is 0.25 m³/h, and the optimal hydraulic stay time is 1.5 h. Under the selected experimental condition, the average removal ratio of COD_cr could reach more than 85% and the biological concentration could also reach 28.31 mg/L. The experimental result also indicates that the biomembrane is active and the reactor has strong capability to resist impact load.

Key words: threephase biofluidized bed, beer wastewater treatment, resistance to impact load, biological concentration