抄録
There are the improvement of standard of living and the increase of public awareness of environment. In Korea sewage treatment plant was first introduced in 1970's, and now it is constructed to small towns. Untill now sewage treatment plant has used biological treatment system to remove organics and suspended solids.
But according to the improvement of living standard and the strict restriction of effluent, secondary treatment has had a limit. Technological advances have been achieved in the sewage treatment to remove nitrogen and phosphorus simultaneously. To keep pace with this situation, POSCO E&C developed Bio-SAC BNR Process using fluidized media. In this section the result of operation will be showed at Uljin sewage treatment plant during the winter season.
