하수슬러지의 공정 중 최종 산물인 탈수케익 형태의 슬러지가 아닌 침사지를 거친 슬러지를 이용하여 실험을 진행하였다.
The experiment was conducted using sludge that had gone through the sand basin not the sludge in the form of dewatered cake, the final product out of the process of sewage sludge.