This study was performed to improve an Activated Sludge Processes using a Fixed Biofilm Reactor. Advantages of the process include decrease in the residence time and reduction of the sluge volume. Operating parameters were investigated during long-term performance tests. Among the reaction times of 2.5, 3.5, and 5 hours, 2.5 hours was the most efficient and economical. In the experiments, 9㎎/L, 9㎎/L and 8㎎/L of effluent were obtained, respectively, which showed 90% BOD, 86% COD and 85% SS removal. In comparison with the Activated Sludge Processes, the amount of generated sludge was reduced by 75% and turbidity of effluent was as low as 4NTU. Further studies are needed for applications in large public wastement treatment plants and small business plants, based on this study. |
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