| Title |
The Piggery Wastewater Treatment by Trickling Filter and Nitrification Effects |
| Authors |
이찬기 ; 윤주환 ; 권재혁 ( Chan Ki Lee ; Zu Whan Yun ; Jae Hyouk Kwon ) |
| Abstract |
Trickling filter was seldom considered for the piggery wastewater treatment since high suspended solids(SS) and biochemical oxygen demand(BOD) contents could hamper its operation due to the frequent clogging problem. In order to minimize the clogging problem, a pretreatment process using the rice straw column filtration was applied in this study. The filtered effluent was then applied to a two-stage laboratory trickling filter unit which used a crushed stone medium, and the removal of organics and conversion of nitrogenous compounds in the wastewater were observed. The operational results of laboratory trickling filter system showed that piggery wastewater was successfully treated without clogging problems. The trickling filter with effluent recycle improved the effluent quality probably due to the dilution effect. In addition treatment by two stage trickling fitter process could not achieve the full nitirification potential, probably due to the high ammonia-nitrogen concentration. It was also noticed that BOD test were affected by nitrification, especially at low organic concentration. |