| Title |
Removal of Nitrogen and Phosphorus in Sewage by Change of Operating Conditions on SBR Process |
| Authors |
한지용(Ji Yong Han),허목(Mock Huh) |
| Abstract |
This study was performed to evaluate the effects of the ratio of aeration/mixing time, the fill tires and the repeat cycle of aeration/mixing, for the removal of organics, nitrogen and phosphorus in sewage by sequencing batch reactor process. The results of this study were summarized as follows; (1) As the ratio of aeration/mixing time was lower and the fill time was longer, the ORP showed a greater potential difference and the pH values was maintained in a more stable state on microbes because the consumption rate of alkalinity was deceased. (2) The organics removal efficiency was increased with increasing the ratio of aeration/mixing time, the fill time and the repeat cycle of aeration/mixing, and it was the highest when the repeat cycle of aeration/mixing was 6 times/cycle. (3) The TSS removal efficiency exceeded 93% and it was not affected by the ratio of aeration/mixing time, the fill time and the repeat cycle of aeration/mixing. (4) The T-N removal efficiency was increased as the ratio of aeration/mixing time was lower and the fill time was longer. Especially, the T-N removal efficiency was the highest when the repeat cycle of aeration/mixing was 6 times/cycle. (5) The T-P removal efficiency showed a great difference in each operating condition, it was influenced greatly by the ratio of aeration/mixing time and the repeat cycle of aeration/mixing among the operating conditions, and it was the highest in the run which the denitrification rate was the highest. |