修正A/O-生物膜시스템을 利用한 N, P 同時除去

Abstract

The rapid development of human activity has resulted in large amounts of nutrients flowing from wastewater into rivers and lakes. Consequently, the water environment has deteriorated. To improve water quality, it is very important to remove nutrients such as nitrogen and phosphorus from wastewater. In this study, for solving these problems, the simultaneous removal of N and P of wastewater using modified A/O-Biofilm process with media coated microorganism as support carrier in pilot plant was investigated. The findings are as follows:

1. The average removal efficiency of BOD was 90.54%. The average concentration of SS in effluent was ranged from 7.00 to 19.00？r/L.

2. The average removal efficiency of T-N in plant was 60.71%. In the case of average specific efficiencies of nitrification and denitrification, they were 72.14 and 97.5？rN/gMLVSS․day, respectively.

3. The average removal efficiency of T-P in pilot plant was 72.76%. In the case of PO4-P, it was 66.4%. The consumption of T-P in the oxic area were 32.42？rP/gMLVSS․day. Especially, about 62.8% of T-P was removed in the oxic area ？T.

4. The average removal efficiencies of SS, BOD and T-P in the modified A/O-Biofilm process were similar to those of the conventional A/O process. However, in the case of COD and T-N, they were increased by about 7.4 % and 24.3 %, respectively.