이때 M I과 M II에 각각 2 g의 하수 슬러지 활성탄을 주입하였고, 150rpm에서 5분간 교반 후 침강성을 비교하였다.
At this time, 2 g of sewage sludge activated carbon was injected into M I and M II, respectively, and the precipitation was compared after stirring at 150 RPM for 5 minutes.