| Title |
Comparison of the Removal Efficiency and the Pollutant Loading by Each Nightsoil Treatment Method |
| Authors |
우스순 ; 방명렬 ; 윤경애 ; 박정희 ; 김영진 ; 최규열 ; 정의호 ( Seung Soon Woo ; Myong Ryul Bang ; Kyong Ae Yoon ; Chung Hee Park ; Yong Jin Kim ; Kyu Yol Choi ; Ui Ho Jeong ) |
| Abstract |
This research was conducted to evaluate the removal efficiency and the pollutant loading in AOD(Aerobic Digestion+Oxidation Ditch)plant, AAS(Aerobic Digestion+Activated Sludge)Plant, ANA(Anaerobic Digestion+Activated Sludge)plant and ACC(Aerdbic Digestion+Chemical Coagulant)plant for nightsoil treatments. The anual collection amount of nightsoil and septage in AOD, AAS, ANA and ACC treatment plants were 6,328.4, 7,418.3, 18,246.5 and 5,106.5 kl/year, and the ratio of nightsoil to septage of these were 12:1, 2:1, 1:1 and 3:1 respectively. The removal efficiency of BOD, SS, TKN and TP in ACC plant were 98.2, 98.4, 65.6 and 98.0% respectively, which was the highest removal efficiency of the four plants. The loading amount of BOD, SS, TKN and TP loaded into the river per the collected nightsoil in ACC treatment plant were 0.06, 0.08, 0.4 and 0.02㎏/㎥/day, and the average loading amount of the other three treatment plants were 0.74, 1.33, 1.20 and 0.27㎏/㎥/day respectively. |