| Title |
Removal of Nitrogen and Phosphorus Using Reactors Packed with Sulfur/Seashell and Slag |
| Authors |
김창운 ( Chang Woon Kim ) ; 조광명 ( Kwang Myeung Cho ) |
| Abstract |
Ths study was performed to investigate the nitrogen and phosphorus removal capability of the reactors packed with sulfur/seashell and slag, The results of the experiment using slag showed that the smaller the size of the slag particle, the better the alkali supply and the phosphorus removal capacities of the slag. When the influent PO_4^3--P concentration was maintained at 10 mg/L and the NO_3^--N concentration was increased, the denitrification efficiency of the reactors packed with sulfur/seashell and slag was above 90% up to the loading rate of 116 g NO_3^--N/m^3-day, but deteriorated to 57% at the loading rate of 170 g NO_3^--N/m^3-day. The effluent PO_4^3--P concentration of the slag-packed reactor was above 1.0 mg/L, but was below 1.0 mg/L when the effluent of the sulfur/seashell packed reactor was fed into the slag-packed reactor after filtration. The average SO_4^2- generation rate was 7.0 g SO_4^2-/g NO_3^--N removed, which was less than the theoretical value of 7.54 g SO_4^2-/g NO_3^--N, The pH and alkalinity of the final effluent was kept higher than the influent due to supplement of alkalinity by the seashell and slag. |